Induced draft fan with convertible air ducts
By introducing air duct conversion components and cooling components into the induced fan, the problems of air outlet pipe blockage and cooling in the dust environment of the induced fan are solved, automatic exhaust and gas cooling are achieved, equipment damage and water return, and equipment Reliability and environmental protection performance.
Patent Information
- Application Number
- CN202421099902.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-20
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-05-20
AI Technical Summary
The existing induced air blower is likely to cause the air outlet pipe to be blocked when used in a dusty environment, resulting in the inability to discharge and damage to the gas, and lacks effective cooling and return protection measures.
A induced air fan with a convertible air duct is designed, including a duct conversion assembly and a cooling assembly. The air duct conversion assembly automatically exhausts the valve plate and sub-pipe through the motor drive to clean the inner wall of the air pipe; the cooling assembly cools down through the spray pipe and the check plate, and passes through the filter to prevent foreign matter from flowing back.
It realizes automatic air duct conversion when the outlet pipe is blocked, avoids damage to the fan, and effectively cools the gas, prevents cooling water from flowing back, improving the reliability of the equipment and environmental protection performance.
Smart Images
Figure CN222228925U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of induced draft fans, and in particular relates to an induced draft fan with a switchable air duct. Background Art
[0002] At present, the air outlets of most induced draft fans are rectangular. If they are to be connected to external pipes with different shapes (such as round), adapters (i.e. conversion interfaces) must be installed.
[0003] After checking, the disclosure (announcement) number: CN210769534U discloses a induced draft fan conversion interface and an induced draft fan and fan system using the same. This technology discloses "an induced draft fan conversion interface and an induced draft fan and fan system using the same, the conversion interface includes an assembly section, a transition section and an outlet section, the assembly section and the outlet section are respectively located at the two ends of the transition section, the assembly section includes an inner ring and an outer ring, the top of the outer ring is connected to the transition section, the ends of the inner ring and the outer ring are provided with a connecting plate connection and other technical contents, and discloses the induced draft fan conversion interface and the induced draft fan and fan system using the same, when the conversion interface is installed at the air outlet, the inner wall surface of the inner ring is closely matched with the outer surface of the exhaust duct, simplifying the installation structure, reducing parts, reducing costs, and making the installation simpler and more efficient and other technical effects";
[0004] Existing induced draft fans are mainly used for smoke emission and dusty environments, and can improve the indoor environment. However, when the induced draft fan is used in a dusty environment, it is easy to cause the air outlet pipe of the induced draft fan to be blocked. After the air duct is blocked, the air pressure on the inner wall of the air outlet pipe is easy to rise, and the gas cannot be discharged, which is easy to damage the induced draft fan.
[0005] In order to solve the above problems, the present application proposes an induced draft fan with a switchable air duct. Utility Model Content
[0006] To solve the problems raised in the above background technology, the utility model provides an induced draft fan with a switchable air duct, which can automatically open the auxiliary pipe to exhaust air when the air outlet pipe is blocked, thereby avoiding damage to the induced draft fan, and can cool the hot gas without causing cooling water to reflux.
[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an induced draft fan with a switchable air duct, comprising a fan body, and also comprising an air duct switching assembly installed at an air outlet of the fan body;
[0008] The air duct conversion assembly includes an outlet pipe, a sub-pipe installed in an L-shaped structure on the outer surface of the outlet pipe, and a motor installed on the outer surface of the outlet pipe. The output end of the motor passes through the outlet pipe and extends into the outlet pipe, and is connected to a valve plate 1 rotatably connected in the outlet pipe. A valve plate 2 is rotatably connected in the sub-pipe. The valve plate 2 and a rotating shaft on one side of the valve plate pass through the sub-pipe and the outlet pipe respectively, and are respectively connected to two pulleys arranged under the outlet pipe and the sub-pipe. The two pulleys are connected by belts.
[0009] As a preferred induced draft fan with a switchable air duct of the utility model, a pull rod with a T-shaped structure is rotatably connected in a groove opened on one surface of the valve plate, one end of the pull rod is rotatably connected to a cross bar, and a scraper ring is installed on the outer surface of the cross bar.
[0010] As a preferred embodiment of the induced draft fan with a switchable air duct of the utility model, a pressure gauge is installed on the outer surface of the air outlet pipe.
[0011] As a preferred embodiment of the induced draft fan with a switchable air duct of the utility model, the valve plate 1 and the valve plate 2 are parallel.
[0012] As a preferred induced draft fan with a convertible air duct of the utility model, it also includes a cooling assembly installed at the air inlet of the fan body, the cooling assembly includes a connecting box installed at the air inlet of the fan body, a spray pipe installed in the connecting box, and an air inlet pipe installed on the bottom surface of the connecting box by bolts, and two obliquely arranged check plates are installed in the connecting box, and the two check plates are in opposite directions.
[0013] As a preferred embodiment of the induced draft fan with a switchable air duct of the utility model, a filter is installed in the water outlet groove opened on the outer surface of the connection box.
[0014] Compared with the prior art, the beneficial effects of the utility model are:
[0015] 1. On this basis, an air duct conversion component is added. When the fan body discharges dust or smoke into the outlet pipe, if the outlet pipe is blocked, the motor on the outlet pipe drives valve plate 1 to close, and at the same time, valve plate 1 drives valve plate 2 through the pulley, so that valve plate 2 can open, and then the gas is discharged through the auxiliary pipe, which will not cause damage to the fan body. At the same time, valve plate 1 can drive the pull rod when rotating, so that the pull rod pulls the scraper ring through the cross bar to clean the inner wall of the outlet pipe;
[0016] 2. At the same time, a cooling component is added on this basis. When the fan body takes in air, the gas takes in air from the air inlet pipe of the connection box and is guided by two check plates to prevent gas backflow. The gas is then cooled by the spray pipe. In order to prevent water vapor from condensing and falling back into the pipe, the water is guided by two check plates to be discharged outside the connection box, and a filter is used to prevent foreign matter from entering the connection box. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:
[0018] Figure 1 It is a structural schematic diagram of the utility model;
[0019] Figure 2 This is a schematic diagram of the structure of the air duct conversion assembly in the utility model;
[0020] Figure 3 For the utility model Figure 2 A cross-sectional view of
[0021] Figure 4 It is a schematic diagram of the structure of the cooling component in the utility model.
[0022] In the figure:
[0023] 1. Fan body;
[0024] 2. Air duct conversion assembly; 201. Air outlet pipe; 202. Auxiliary pipe; 203. Motor; 204. Valve plate 1; 205. Valve plate 2; 206. Pulley; 207. Pull rod; 208. Cross bar; 209. Scraper ring; 210. Pressure gauge;
[0025] 3. Cooling assembly; 301. Connection box; 302. Spray pipe; 303. Air intake pipe; 304. Check plate; 305. Filter. DETAILED DESCRIPTION
[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0027] Example 1
[0028] like Figure 1-Figure 4 As shown;
[0029] A draft fan with a switchable air duct comprises a fan body 1.
[0030] In this embodiment: after checking the public (announcement) number: CN210769534U discloses a induced draft fan conversion interface and an induced draft fan and fan system using the same, and this technology discloses "an induced draft fan conversion interface and an induced draft fan and fan system using the same, the conversion interface includes an assembly section, a transition section and an outlet section, the assembly section and the outlet section are respectively located at the two ends of the transition section, the assembly section includes an inner ring and an outer ring, the top of the outer ring is connected to the transition section, the ends of the inner ring and the outer ring are provided with a connecting plate connection and other technical contents, and discloses the induced draft fan conversion interface and the induced draft fan and fan system using the same, when the conversion interface is installed at the air outlet, the inner wall surface of the inner ring is closely matched with the outer surface of the exhaust duct, simplifying the installation structure, reducing parts, reducing costs, and installing more simply and efficiently and other technical effects";
[0031] Existing induced draft fans are mainly used for smoke emission and dusty environments, and can improve the indoor environment. However, when the induced draft fan is in use, it is easy to cause the air outlet pipe of the induced draft fan to be blocked when used in a dusty environment. After the air duct is blocked, the air pressure on the inner wall of the air outlet pipe is easily increased, and the gas cannot be discharged, which is easy to damage the induced draft fan. In terms of actual use, this problem is obviously a real problem that is difficult to solve. In view of this, in order to solve this technical problem, an air duct conversion component 2 and a cooling component 3 are added to the present application document.
[0032] According to the above content, in order to be able to automatically switch the air duct when the air outlet pipe 201 is blocked and avoid damage to the fan and the main body caused by blockage of a single air duct, it also includes an air duct conversion component 2 installed at the air outlet of the fan main body 1; the air duct conversion component 2 includes an outlet pipe 201 and an L-shaped structure installed on the outer surface of the outlet pipe 201, and a motor 203 installed on the outer surface of the outlet pipe 201, the output end of the motor 203 passes through the outlet pipe 201 and extends into the outlet pipe 201, and is connected to a valve plate 1 204 rotatably connected in the outlet pipe 201, a valve plate 205 is rotatably connected in the auxiliary pipe 202, the rotating shafts of the valve plate 205 and the valve plate 1 204 side respectively pass through the auxiliary pipe 202 and the outlet pipe 201, and are respectively connected to two pulleys 206 arranged below the outlet pipe 201 and the auxiliary pipe 202, and the two pulleys 206 are connected by belts.
[0033] In this embodiment: after the fan body 1 discharges dust or smoke into the outlet pipe 201, the outlet pipe 201 is blocked, and the motor 203 on the outlet pipe 201 drives the valve plate 1 204 to close, and at the same time, the valve plate 1 204 drives the valve plate 2 205 through the pulley 206, so that the valve plate 2 205 can be opened, and then the gas is discharged through the auxiliary pipe 202, and will not cause damage to the fan body 1.
[0034] In an optional embodiment: a T-shaped pull rod 207 is rotatably connected in a groove formed on the surface of the valve plate 1 204 , one end of the pull rod 207 is rotatably connected to a cross bar 208 , and a scraper ring 209 is installed on the outer surface of the cross bar 208 .
[0035] In this embodiment, the valve plate 204 can drive the pull rod 207 when rotating, so that the pull rod 207 pulls the scraper ring 209 through the cross bar 208 to clean the inner wall of the air outlet pipe 201.
[0036] In an optional embodiment, a pressure gauge 210 is installed on the outer surface of the air outlet pipe 201 .
[0037] In this embodiment, the pressure in the air outlet pipe 201 is monitored by a pressure gauge 210 .
[0038] In an optional embodiment, valve plate 1 204 and valve plate 2 205 are parallel.
[0039] In this embodiment, when the valve plate 1 204 and the air outlet pipe 201 are closed, the valve plate 2 205 is in an open state, and vice versa.
[0040] According to the above content, in order to be able to automatically switch the air duct when the air outlet pipe 201 is blocked and avoid damage to the fan and the main body due to blockage of a single air duct, it also includes a cooling assembly 3 installed at the air inlet of the fan main body 1. The cooling assembly 3 includes a connecting box 301 installed at the air inlet of the fan main body 1, a spray pipe 302 installed in the connecting box 301, and an air inlet pipe installed on the bottom surface of the connecting box 301 by bolts. Two inclined check plates 304 are installed in the connecting box 301, and the two check plates 304 are in opposite directions.
[0041] In this implementation scheme: when the fan body 1 takes in air, the gas takes in from the air inlet pipe 303 of the connecting box 301, and is guided by two check plates 304 to prevent gas backflow, and then the gas is cooled by the spray pipe 302. At the same time, in order to prevent water vapor from condensing and falling back into the pipeline, water is guided by two check plates 304 to be discharged outside the connecting box 301.
[0042] In an optional embodiment: a filter screen 305 is installed in the water outlet groove opened on the outer surface of the connection box 301.
[0043] In this embodiment, the filter screen 305 is used to prevent foreign matter from entering the connection box 301 .
[0044] The working principle and use process of the utility model are as follows: when the fan body 1 discharges dust or smoke into the outlet pipe 201, after the outlet pipe 201 is blocked, the motor 203 on the outlet pipe 201 drives the valve plate 1 204 to close, and at the same time, the valve plate 1 204 drives the valve plate 2 205 through the pulley 206, so that the valve plate 205 can be opened, and then the gas is discharged through the auxiliary pipe 202, which will not cause damage to the fan body 1. At the same time, a pull rod 207 with a T-shaped structure is rotatably connected in the groove opened on the surface of the valve plate 1 204, and one end of the pull rod 207 is rotatably connected to a cross bar 208, and the cross bar 20 A scraper 209 is installed on the outer surface of 8 to clean the inner wall of the outlet pipe 201. The pressure in the outlet pipe 201 is monitored by a pressure gauge 210. When the fan body 1 takes in air, the gas takes in from the air inlet pipe 303 of the connection box 301, and the gas is guided by two check plates 304 to prevent gas reflux. The gas is then cooled by the spray pipe 302. In order to prevent water vapor from condensing and falling back into the pipeline, water is guided by two check plates 304 to be discharged outside the connection box 301, and foreign matter is prevented from entering the connection box 301 through the filter screen 305.
[0045] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. An induced draft fan with a switchable air duct, comprising a fan body (1), characterized in that: It also includes an air duct conversion assembly (2) installed at the air outlet of the fan body (1); The air duct conversion assembly (2) comprises an air outlet pipe (201) installed thereon, an auxiliary pipe (202) with an L-shaped structure installed on the outer surface of the air outlet pipe (201), and a motor (203) installed on the outer surface of the air outlet pipe (201); the output end of the motor (203) passes through the air outlet pipe (201) and extends into the air outlet pipe (201), and is connected to a valve plate 1 (204) rotatably connected to the air outlet pipe (201); a valve plate 2 (205) is rotatably connected to the auxiliary pipe (202); the rotating shafts on the side of the valve plate 2 (205) and the valve plate 1 (204) respectively pass through the auxiliary pipe (202) and the air outlet pipe (201), and are respectively connected to two pulleys (206) arranged below the air outlet pipe (201) and the auxiliary pipe (202); the two pulleys (206) are connected by belts.
2. The induced draft fan with a switchable air duct according to claim 1, characterized in that: A T-shaped pull rod (207) is rotatably connected in a groove formed on the surface of the valve plate (204), one end of the pull rod (207) is rotatably connected to a cross rod (208), and a scraper ring (209) is installed on the outer surface of the cross rod (208).
3. The induced draft fan with a switchable air duct according to claim 1, characterized in that: A pressure gauge (210) is installed on the outer surface of the air outlet pipe (201).
4. The induced draft fan with a switchable air duct according to claim 1, characterized in that: The valve plate 1 (204) and the valve plate 2 (205) are parallel.
5. The induced draft fan with a switchable air duct according to claim 1, characterized in that: It also includes a cooling assembly (3) installed at the air inlet of the fan body (1), the cooling assembly (3) including a connection box (301) installed at the air inlet of the fan body (1), a spray pipe (302) installed in the connection box (301), and an air inlet pipe installed on the bottom surface of the connection box (301) by bolts, and two tilted check plates (304) are installed in the connection box (301), and the two check plates (304) are in opposite directions.
6. The induced draft fan with a switchable air duct according to claim 5, characterized in that: A filter screen (305) is installed in the water outlet groove provided on the outer surface of the connection box (301).