Centrifugal fan for heating furnace

Abstract

The centrifugal fan for the heating furnace comprises a fan unit, the fan unit comprises a volute fixedly installed on the outer side of the side wall of the heating furnace and a fan driving source fixedly installed on the outer side of the volute and used for driving the fan, and the upper side wall of the volute is fixedly communicated with an air outlet pipe; the air outlet cooling unit comprises a cooling box fixedly arranged on one side of the volute, the interior of the cooling box is divided into a cooling cavity and a cold source cavity which are arranged in parallel through a partition plate, a coil pipe is arranged in the cooling cavity, one end of the coil pipe is communicated with the air outlet pipe through a ventilation pipe, and the other end of the coil pipe is fixedly communicated with an exhaust pipe; the lower portion of an inner cavity of the cold source cavity communicates with the cooling cavity through a circulating pipe, and a circulating pump communicating with the circulating pipe is fixedly installed on the outer side wall of the cooling box. According to the utility model, the cooled gas is exhausted to the outside through the exhaust pipe, so that the defect that the gas containing heat is directly exhausted to the outside to easily form thermal pollution is effectively overcome.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal fans, in particular to a centrifugal fan for a heating furnace. Background Art

[0002] A centrifugal fan is a mechanical device that uses centrifugal force to move air or gas from the center of the fan toward the periphery. The rotating impeller accelerates the gas, which is then expelled outward through the fan casing under the action of centrifugal force. Centrifugal fans are commonly used in ventilation, air conditioning, industrial exhaust, and gas transportation, and are often found in heating furnaces.

[0003] The centrifugal fans currently used in heating furnaces contain a certain amount of heat in the air discharged from their exhaust ports during actual use, and are often directly discharged to the outside, which easily causes thermal pollution. Utility Model Content

[0004] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and in the abstract and title of the utility model to avoid obscuring the purpose of this section, the abstract and the title of the utility model, and such simplifications or omissions shall not be used to limit the scope of the present invention.

[0005] In view of the above problems existing in the existing centrifugal fan for a heating furnace, the present utility model is proposed.

[0006] Therefore, the purpose of the present invention is to provide a centrifugal fan for a heating furnace, which is suitable for solving the problem in the prior art that the air discharged from the exhaust port contains a certain amount of heat and is often directly discharged to the outside, which easily causes thermal pollution.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a centrifugal fan for a heating furnace, comprising:

[0008] A fan unit includes a volute fixedly mounted on the outside of the side wall of the heating furnace and a fan driving source fixedly mounted on the outside of the volute for driving the fan, wherein the upper side wall of the volute is fixedly connected to an air outlet pipe;

[0009] The air outlet cooling unit includes a cooling box fixedly arranged on one side of the volute, the cooling box is divided into a cooling chamber and a cold source chamber arranged in parallel by a partition plate, a coil is arranged in the cooling chamber, one end of the coil is connected to the air outlet pipe through a ventilation pipe, and the other end of the coil is fixedly connected to the exhaust pipe, the lower part of the cold source chamber is connected to the cooling chamber through a circulation pipe, and a circulation pump connected to the circulation pipe is fixedly installed on the outer wall of the cooling box, the cooling chamber and the cold source chamber are also connected through a one-way valve, and the one-way valve is arranged away from the circulation pipe, and sufficient water is stored in both the cold source chamber and the cooling chamber.

[0010] As a preferred solution of the centrifugal fan for a heating furnace described in the utility model, the top end of the air outlet pipe and the end of the ventilation pipe away from the coil are fixedly connected with docking ears, and the two docking ears are fastened together by multiple groups of evenly distributed fastening screws.

[0011] As a preferred solution of a centrifugal fan for a heating furnace described in the utility model, wherein: the side of the volute away from the fan driving source is fixedly connected to a docking flange through a docking cover, and an induced draft hood connected to the volute is fixedly installed on the docking flange. The centrifugal fan also includes an anti-loosening fastening unit, which includes a plurality of evenly distributed fastening bolts, and the plurality of fastening bolts are used to fasten the docking cover and the docking flange. A plurality of evenly distributed hexagonal positioning grooves are provided on the side of the docking flange away from the docking cover, and a hexagonal positioning block matching the hexagonal positioning groove is frictionally and slidingly connected to the fastening bolt.

[0012] As a preferred solution of the centrifugal fan for a heating furnace described in the utility model, each of the fastening bolts is provided with a plurality of symmetrically positioned friction grooves, and the hexagonal positioning block is provided with a friction slider matching the friction grooves.

[0013] As a preferred solution of the centrifugal fan for a heating furnace described in the utility model, the coil is configured to be multi-stage bent and is made of copper alloy.

[0014] As a preferred solution of the centrifugal fan for a heating furnace described in the utility model, the volume of the cooling chamber is less than one twentieth of the volume of the cold source chamber, and the cooling box is made of aluminum alloy material.

[0015] The beneficial effects of the utility model are as follows: the hot air transported by the centrifugal fan enters the coil through the ventilation pipe, the heat carried in the gas is transferred to the cold water in the cooling chamber through the side wall of the coil, the circulation pump is started, and the cold water in the cold source chamber is continuously transported into the cooling chamber through the circulation pipe, the water in the cooling chamber that has absorbed the heat flows back into the cold source chamber through the one-way valve, and the gas that has been cooled is discharged to the outside through the exhaust pipe, which effectively solves the defect that the gas containing heat is directly discharged to the outside and easily causes thermal pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. Among them:

[0017] Figure 1 This is a schematic diagram of the overall structure of a centrifugal fan for a heating furnace proposed in the present invention;

[0018] Figure 2 This is a schematic structural diagram of an air outlet cooling unit of a centrifugal fan for a heating furnace proposed in the present invention;

[0019] Figure 3 This is a schematic structural diagram of an anti-loosening and fastening unit for a centrifugal fan for a heating furnace proposed by the utility model.

[0020] Description of the drawings: 100 fan unit, 101 heating furnace side wall, 102 volute, 103 air outlet pipe, 104 fan drive source, 105 docking cover, 106 docking flange, 107 induced draft hood, 200 air outlet cooling unit, 201 docking ear, 202 fastening screw, 203 ventilation pipe, 204 cooling box, 205 partition plate, 206 coil, 207 exhaust pipe, 208 circulation pipe, 209 circulation pump, 210 one-way valve, 300 anti-loosening fastening unit, 301 fastening bolt, 302 hexagonal positioning groove, 303 hexagonal positioning block, 304 friction slider. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0022] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0023] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0024] Furthermore, the present invention is described in detail with reference to schematic diagrams. For ease of illustration, when describing embodiments of the present invention, cross-sectional views of device structures may be partially enlarged and not to scale. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, three-dimensional dimensions, including length, width, and depth, should be included.

[0025] Example

[0026] Reference Figure 1-Figure 3, which is an embodiment of the present invention, provides a centrifugal fan for a heating furnace, including: a fan unit 100, an air outlet cooling unit 200 and an anti-loosening and fastening unit 300.

[0027] The fan unit 100 includes a volute 102 fixedly mounted on the outside of the side wall 101 of the heating furnace and a fan drive source 104 fixedly mounted on the outside of the volute 102 for driving the fan. An air outlet 103 is fixedly connected to the upper side wall of the volute 102. A centrifugal fan impeller for conveying gas is provided in the volute 102. In the present invention, the volute 102 and the centrifugal fan impeller are inherent components of the centrifugal fan, and their working principle and specific structure are not described in detail here.

[0028] Secondly, the air outlet cooling unit 200 includes a cooling box 204 fixedly arranged on one side of the volute 102. The cooling box 204 is divided into a cooling chamber and a cold source chamber arranged in parallel by a partition plate 205. The volume of the cooling chamber is less than one twentieth of the volume of the cold source chamber, ensuring that there is sufficient cold water circulation to meet the use requirements of cooling the hot air discharged by the fan. The cooling box 204 is made of aluminum alloy. The cooling box made of aluminum alloy has a good heat dissipation effect and can quickly diffuse the heat inside it to the outside. A coil 206 is arranged in the cooling chamber. The coil 206 is set to a multi-stage bending type, and the coil 206 is made of copper alloy, which increases the contact area between the coil 206 and the cold water. The coil 206 made of aluminum alloy has good thermal conductivity, which improves the cooling effect of the cooling box 204 on the exhaust gas of the fan. As a result, one end of the coil 206 is connected to the air outlet pipe 103 through the ventilation pipe 203, and the top of the air outlet pipe 103 and the end of the ventilation pipe 203 away from the coil 206 are fixedly connected with a docking ear 201, and the two docking ears 201 are fastened together by multiple groups of evenly distributed fastening screws 202. This arrangement allows the air outlet cooling unit 200 to be removed from the volute, making it easy to inspect and replace the various components of the centrifugal fan, and the other end of the coil 206 is fixedly connected with an exhaust pipe 207, and the lower part of the cold source cavity is connected to the cooling cavity through a circulation pipe 208, and a circulation pump 209 connected to the circulation pipe 208 is fixedly installed on the outer wall of the cooling box 204. The cooling cavity and the cold source cavity are also connected through a one-way valve 210, and the one-way valve 210 is arranged away from the circulation pipe 208. Sufficient water is stored in both the cold source cavity and the cooling cavity.

[0029] Secondly, the side of the volute 102 away from the fan driving source 104 is fixedly connected to a docking flange 106 through a docking cover 105, and an air induced hood 107 connected to the volute 102 is fixedly mounted on the docking flange 106;

[0030] Finally, the anti-loosening fastening unit 300 includes a plurality of evenly distributed fastening bolts 301, which are used to fasten the docking cover 105 and the docking flange 106. A plurality of evenly distributed hexagonal positioning grooves 302 are provided on the side of the docking flange 106 away from the docking cover 105, and a hexagonal positioning block 303 matching the hexagonal positioning groove 302 is frictionally and slidingly connected on the fastening bolt 301. A plurality of symmetrical friction grooves are provided on each fastening bolt 301, and a friction slider 304 matching the friction groove is provided on the hexagonal positioning block 303. This arrangement increases the static friction between the friction slider 304 and the fastening bolt 301, ensuring that the hexagonal positioning block 303 will not slip out of the hexagonal positioning groove 302 when the fan is in use.

[0031] During use, the hot air transported by the centrifugal fan enters the coil 206 through the ventilation pipe 203, and the heat carried by the gas is transferred to the cold water in the cooling chamber through the side wall of the coil 206. The circulation pump 209 is started, and the cold water in the cold source chamber is continuously transported into the cooling chamber through the circulation pipe 208. The water in the cooling chamber that has absorbed the heat flows back into the cold source chamber through the one-way valve 210. The gas that has been cooled is discharged to the outside through the exhaust pipe 207, which effectively solves the problem of heat pollution caused by directly discharging the gas containing heat to the outside.

[0032] After fastening the docking flange 106 and the docking cover 105 with a plurality of fastening bolts 301, the hexagonal positioning blocks 303 are pushed into the corresponding hexagonal positioning grooves 302 in sequence. The hexagonal positioning blocks 303 firmly position the fastening bolts 301, effectively solving the defect that the vibration generated by the operation of the centrifugal fan easily causes the fastening bolts 301 to loosen.

[0033] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, and all of these should be included in the scope of the claims of the present invention.

Claims

1. A centrifugal fan for a heating furnace, characterized in that: include: A fan unit (100) includes a volute (102) fixedly mounted on the outside of a heating furnace side wall (101) and a fan driving source (104) fixedly mounted on the outside of the volute (102) for driving the fan, wherein an air outlet pipe (103) is fixedly connected to the upper side wall of the volute (102); The air outlet cooling unit (200) comprises a cooling box (204) fixedly arranged on one side of a volute (102); the cooling box (204) is divided into a cooling chamber and a cold source chamber arranged in parallel by a partition plate (205); a coil (206) is arranged in the cooling chamber; one end of the coil (206) is connected to the air outlet pipe (103) through a ventilation pipe (203), and the other end of the coil (206) is fixedly connected to an exhaust pipe (207); the lower part of the cold source chamber is connected to the cooling chamber through a circulation pipe (208), and a circulation pump (209) connected to the circulation pipe (208) is fixedly installed on the outer wall of the cooling box (204); the cooling chamber and the cold source chamber are also connected through a one-way valve (210), and the one-way valve (210) is arranged away from the circulation pipe (208); and sufficient water is stored in both the cold source chamber and the cooling chamber.

2. A centrifugal fan for a heating furnace according to claim 1, characterized in that: The top end of the air outlet pipe (103) and the end of the ventilation pipe (203) away from the coil (206) are both fixedly connected with docking ears (201), and the two docking ears (201) are fastened and connected by multiple groups of evenly distributed fastening screws (202).

3. The centrifugal fan for a heating furnace according to claim 1, characterized in that: The side of the volute (102) away from the fan driving source (104) is fixedly connected to a docking flange (106) through a docking cover (105), and an air induced draft cover (107) connected to the volute (102) is fixedly mounted on the docking flange (106). The centrifugal fan also includes an anti-loosening fastening unit (300), which includes a plurality of evenly distributed fastening bolts (301). The plurality of fastening bolts (301) are used to fasten the docking cover (105) and the docking flange (106). The side of the docking flange (106) away from the docking cover (105) is provided with a plurality of evenly distributed hexagonal positioning grooves (302), and the fastening bolts (301) are frictionally and slidably connected to a hexagonal positioning block (303) matching the hexagonal positioning groove (302).

4. A centrifugal fan for a heating furnace according to claim 3, characterized in that: Each of the fastening bolts (301) is provided with a plurality of symmetrically positioned friction grooves, and the hexagonal positioning block (303) is provided with a friction sliding block (304) matching the friction grooves.

5. The centrifugal fan for a heating furnace according to claim 1, characterized in that: The coil (206) is configured to be multi-stage bent, and the coil (206) is made of copper alloy.

6. The centrifugal fan for a heating furnace according to claim 1, characterized in that: The volume of the cooling cavity is less than one twentieth of the volume of the cold source cavity, and the cooling box (204) is made of aluminum alloy material.

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