High-temperature flue gas high-efficiency flow guiding and conveying fan

Abstract

The utility model relates to fluid machinery technical field discloses high temperature flue gas high -efficient flow guide delivery fan, include: composite protection component, air inlet pipe, air outlet pipe and motor, the composite protection component sets up from outside to inside as steel base layer, heat insulating layer and heat -resistant layer, heat insulating layer fixedly connected in the inside of steel base layer, heat -resistant layer sticks in the inside of heat insulating layer, and, the end of air inlet pipe and air outlet pipe still respectively is provided with sealing assembly. The utility model sets up multilayer composite protection component, utilizes heat insulating layer and heat -resistant layer to effectively block the high temperature to motor, bearing etc. key components conduction, has improved the high temperature resistance and service life of equipment significantly, simultaneously, through setting up the special sealing assembly containing flange block and I -shaped sealing ring, has guaranteed the air -tightness of fan and external pipeline under high temperature and high pressure connection, has effectively prevented the poisonous flue gas leakage.

Description

Technical Field

[0001] This utility model relates to the field of fluid machinery technology, and in particular to a high-efficiency guide and conveying fan for high-temperature flue gas. Background Technology

[0002] Fans are widely used fluid machinery in industrial production, especially in industries such as metallurgy, chemical industry, and power industry, where fans are often needed to transport high-temperature flue gas generated during the production process.

[0003] Existing conventional fans are primarily designed for ambient or medium-temperature gases. When used to directly transport high-temperature flue gas of several hundred degrees Celsius, they reveal serious technical flaws. The high-temperature flue gas comes into direct contact with the fan casing, which is typically a single-layer metal structure with extremely poor thermal insulation.

[0004] A large amount of heat is rapidly conducted through the casing to the critical functional components of the fan, especially the motor and its drive bearings located at the rear. This causes the bearing grease to leak or fail at high temperatures, accelerating wear; at the same time, the motor also overheats due to continuous baking, which can easily lead to aging or even burnout of the coil insulation.

[0005] Therefore, existing fans generally suffer from problems such as easy component damage, short service life, unstable operation and high maintenance costs when operating in high-temperature flue gas environments, making it difficult to meet the needs of modern industry for long-term and high-reliability operation of equipment.

[0006] Therefore, this utility model proposes a high-efficiency high-temperature flue gas guiding and conveying fan to overcome the shortcomings of the existing technology. Utility Model Content

[0007] In view of the problems existing in high-temperature flue gas high-efficiency guiding and conveying fans, such as poor shell insulation performance leading to easy overheating and damage of core components such as motors and bearings, and unreliable sealing at the connection between the fan and the pipeline at high temperatures leading to leakage of toxic high-temperature flue gas, this utility model aims to provide a high-temperature flue gas high-efficiency guiding and conveying fan with an improved structure that can effectively solve the above problems.

[0008] This utility model provides a high-efficiency high-temperature flue gas guiding and conveying fan, comprising: a composite protection component; an air inlet pipe fixedly connected to the front of the composite protection component; an air outlet pipe fixedly connected to one side of the composite protection component; and a motor installed at the rear of the composite protection component.

[0009] The composite protection component consists of a steel base layer, a heat insulation layer, and a heat-resistant layer. The steel base layer is located on the outermost side, the heat insulation layer is fixedly connected to the inner side of the steel base layer, and the heat-resistant layer is adhered to the inner side of the heat insulation layer.

[0010] Furthermore, the high-temperature flue gas high-efficiency guiding and conveying fan also includes sealing components respectively disposed at the ends of the inlet pipe and the outlet pipe.

[0011] The sealing assembly includes: a first flange block fixedly connected to the end of the air inlet pipe or the air outlet pipe; a second flange block for mating with the first flange block; and an I-shaped sealing ring sandwiched between the first flange block and the second flange block.

[0012] Preferably, both the first flange block and the second flange block are provided with mutually matching sealing grooves, and the I-shaped sealing ring is accommodated in the sealing groove.

[0013] Preferably, the sealing assembly further includes bolts that pass through the first flange block and the second flange block and press them together, the bolts being configured to apply preload pressure to the I-shaped sealing ring to ensure reliable sealing.

[0014] Preferably, the interior of the sealing groove is coated with high-temperature resistant grease. This high-temperature resistant grease not only facilitates the installation of the I-shaped sealing ring, but also fills the microscopic gaps on the metal surface, further improving the sealing performance.

[0015] Preferably, the steel base layer is a carbon steel plate, which provides the basic mechanical strength and structural support required for the fan casing.

[0016] Preferably, the insulation layer is made of ceramic fiber, which has an extremely low thermal conductivity and is key to achieving efficient insulation and protecting core components.

[0017] Preferably, the heat-resistant layer is a modified silane coating, which is in direct contact with the high-temperature flue gas to protect the heat insulation layer from erosion and corrosion, and to help block heat.

[0018] Preferably, the high-temperature flue gas high-efficiency guide and conveying fan also includes a base, which is fixedly connected to the bottom of the motor and is used to stably install the entire fan device on a foundation or support.

[0019] This utility model has the following beneficial effects:

[0020] 1. This utility model solves the problems of poor heat insulation performance of the fan casing and easy damage to core components such as motor and bearings by high-temperature flue gas in the prior art by setting a multi-layer composite protection component consisting of a steel base layer, a heat insulation layer and a heat-resistant layer. It achieves excellent heat insulation and high-temperature resistance, and significantly extends the service life and operational stability of the fan under high-temperature conditions.

[0021] 2. This utility model solves the problem of easy deformation and unreliable sealing at high temperatures at the connection between the fan and the pipeline, which leads to leakage of toxic high-temperature flue gas, by setting a sealing component at the end of the inlet and outlet air ducts. It utilizes the cooperation of the first flange block, the second flange block, the I-shaped sealing ring and the sealing groove, and is supplemented with high-temperature resistant grease. It achieves a high-temperature sealing effect with stable structure and high airtightness, ensuring production safety and environmental protection requirements.

[0022] 3. This utility model solves the comprehensive problem that traditional fans cannot operate reliably for a long time in high-temperature and corrosive flue gas environments by combining high-temperature resistant composite protection components with high-sealing sealing components. It achieves the effects of simple structure, comprehensive protection, and easy installation and maintenance, enabling it to efficiently and safely transport high-temperature flue gas. Attached Figure Description

[0023] Figure 1 This is a three-dimensional schematic diagram of the high-temperature flue gas high-efficiency guiding and conveying fan proposed in this utility model;

[0024] Figure 2 This is a schematic diagram of the sealing assembly of the high-temperature flue gas high-efficiency guide and conveyor fan proposed in this utility model;

[0025] Figure 3 This is a schematic diagram of the composite protection component of the high-temperature flue gas high-efficiency guiding and conveying fan proposed in this utility model;

[0026] Figure 4 This is a schematic diagram of the base of the high-temperature flue gas high-efficiency guiding and conveying fan proposed in this utility model.

[0027] Legend:

[0028] 1. Composite protection components; 101. Steel base layer; 102. Heat insulation layer; 103. Heat-resistant layer; 2. Air inlet duct; 3. Air outlet duct; 4. Motor; 5. Sealing components; 501. First flange block; 502. Second flange block; 503. Sealing groove; 504. I-shaped sealing ring; 505. Bolt; 6. Base. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0030] Example:

[0031] Please refer to Figures 1 to 4 This utility model provides a high-efficiency high-temperature flue gas guiding and conveying fan, which aims to solve the problems in the prior art where the fan casing has insufficient high-temperature resistance, which easily leads to overheating failure of core components, and the poor sealing performance at the connection between the fan and the pipeline, which easily leads to leakage of toxic high-temperature flue gas.

[0032] like Figure 1 , Figure 3 and Figure 4 As shown, the high-temperature flue gas high-efficiency guiding and conveying fan includes a composite protection component 1, an inlet pipe 2 fixedly connected to the front of the composite protection component 1, an outlet pipe 3 fixedly connected to one side of the composite protection component 1, and a motor 4 installed behind the composite protection component 1. The composite protection component 1 serves as the main shell structure of the fan to accommodate the fan impeller and form an airflow channel. At the same time, it achieves heat insulation and protection for the internal high-temperature flue gas through a multi-layer composite structure. The inlet pipe 2 is used to connect with the external flue gas inlet pipe and draw the high-temperature flue gas into the composite protection component 1. The outlet pipe 3 is used to guide the pressurized flue gas to the external flue gas exhaust pipe. The motor 4 is used to generate rotational torque to drive the impeller located inside the composite protection component 1 to rotate, thereby providing a power source for flue gas conveying. A base 6 is fixedly connected to the bottom of the motor 4. The base 6 is used to stably support and fix the motor 4 and the entire fan device on the working ground or bracket.

[0033] To achieve excellent high-temperature resistance, the composite protection component 1 comprises, from the outside in, a steel base layer 101, a heat insulation layer 102, and a heat-resistant layer 103. These three components combine to form an organic, high-temperature resistant protective whole. The steel base layer 101, located on the outermost side of the composite protection component 1, is made of carbon steel plate and provides overall mechanical strength and shape support to prevent shell deformation. The heat insulation layer 102, fixedly connected to the inner surface of the steel base layer 101, is made of ceramic fiber with extremely low thermal conductivity and effectively blocks the heat from the high-temperature flue gas from being conducted to the outer steel base layer 101 and the motor 4 behind it. To protect precision components such as bearings from high-temperature damage, the heat-resistant layer 103 is coated on the inner surface of the heat insulation layer 102 and comes into direct contact with the high-temperature flue gas. The material is a modified silane coating. The heat-resistant layer 103 serves two purposes: firstly, to prevent the heat insulation layer 102 from being abraded by dust particles or corroded by chemical components when exposed to flue gas; secondly, to further block residual heat and improve the anti-fouling performance of the inner wall of the shell, facilitating subsequent cleaning and maintenance. In addition, sealing components 5 are provided at the ends of the air inlet pipe 2 and the air outlet pipe 3. The sealing components 5 are used to provide a tight seal in high-temperature environments when the fan is connected to external pipes, preventing flue gas from overflowing.

[0034] To solve the above-mentioned technical problems, the core of the technical solution of this embodiment lies in the setting of the sealing component 5. Furthermore, the sealing component 5 forms a specific structural fit and connection relationship with the aforementioned air inlet pipe 2 and air outlet pipe 3, thereby achieving a reliable leak-proof connection in a high-temperature flue gas environment.

[0035] Please refer to the following carefully. Figure 2 The structure of the sealing assembly 5 is described in detail below: The sealing assembly 5 includes a first flange block 501 fixedly connected to the end of the air inlet pipe 2 or the air outlet pipe 3, a second flange block 502 for mating with the first flange block 501, an I-shaped sealing ring 504 sandwiched between the first flange block 501 and the second flange block 502, and bolts 505 passing through the first flange block 501 and the second flange block 502. The second flange block 502 is used to be fixedly connected to the external smoke inlet pipe or smoke outlet pipe, thereby connecting the fan to the external piping system.

[0036] To ensure a sealing effect, sealing grooves 503 are provided on the opposing end faces of the first flange block 501 and the second flange block 502. The shape of the sealing groove 503 is adapted to the cross-section of the I-shaped sealing ring 504. In the assembled state, the I-shaped sealing ring 504 is accommodated inside the cavity formed by the two sealing grooves 503. Due to its special I-shaped shape, the I-shaped sealing ring 504 increases the contact area with the inner wall of the sealing groove 503.

[0037] During installation, by tightening the bolts 505, the first flange block 501 and the second flange block 502 are pulled closer and pressed against each other. This pressing force acts on the I-shaped sealing ring 504, causing it to undergo elastic deformation, thereby tightly filling the sealing groove 503 and the tiny gap between the flange blocks. This sealing structure, which applies pre-tightening force through the bolts 505 and squeezes the I-shaped sealing ring 504, ensures that the connection still has extremely high airtightness under high temperature flue gas pressure, effectively preventing flue gas leakage.

[0038] To further assist in installation and improve sealing performance, high-temperature grease is applied inside the sealing groove 503 before the I-shaped sealing ring 504 is installed. The high-temperature grease facilitates the installation and positioning of the I-shaped sealing ring 504, and at the same time fills the more microscopic gaps that may exist on the metal surface, thus achieving double sealing protection.

[0039] Based on the above embodiments, the present invention may further include the following preferred technical solutions:

[0040] As a preferred embodiment, to provide sufficient structural strength and foundation support, the steel base layer 101 is made of carbon steel plate.

[0041] As another preferred embodiment, in order to achieve efficient heat insulation, the heat insulation layer 102 is made of ceramic fiber.

[0042] As another preferred embodiment, in order to protect the heat insulation layer 102 and further block heat, the heat-resistant layer 103 is a modified silane coating.

[0043] As another preferred embodiment, in order to facilitate the installation and support of the entire device, the fan also includes a base 6, which is fixedly connected to the bottom of the motor 4.

[0044] The working principle of this high-temperature flue gas high-efficiency guiding and conveying fan is as follows:

[0045] When motor 4 starts, it is installed behind the composite protection component 1. Its output shaft (not shown) drives the fan impeller inside the composite protection component 1 to rotate, thereby doing work on the flue gas. Driven by the impeller, the high-temperature flue gas is drawn into the fan through the inlet pipe 2, flows through the flow channel formed inside the composite protection component 1 and is pressurized, and finally discharged from the outlet pipe 3, realizing the guidance and transportation of flue gas. During this process, the base 6 fixedly connected to the bottom of motor 4 provides stable and reliable installation support for the entire device.

[0046] During the process of the fan transporting high-temperature flue gas, the multi-layer composite structure of the composite protection component 1 plays a core role in heat insulation and protection. The flue gas first comes into contact with the heat-resistant layer 103 coated on the inner side of the heat insulation layer 102. The modified silane coating of the heat-resistant layer 103 protects the inner heat insulation layer 102 from the wear of dust particles and the corrosion of chemical components in the flue gas, and blocks some heat. When the main heat of the high-temperature flue gas tries to be conducted outward, it encounters the heat insulation layer 102 fixedly connected to the inner side of the steel base layer 101. The ceramic fiber material of the heat insulation layer 102 has an extremely low thermal conductivity, forming the main heat barrier. Most of the heat is blocked in the heat insulation layer 102 and cannot be effectively transferred to the outermost steel base layer 101, let alone threaten the motor 4 and its transmission bearings and other key components behind it. This ensures that the fan can still operate stably for a long time under high-temperature conditions and solves the problem of insufficient high-temperature resistance of the shell.

[0047] Meanwhile, at the connection points of the fan's inlet pipe 2 and outlet pipe 3 with the external pipeline, the sealing assembly 5 provides reliable leak-proof protection. During installation, the first flange block 501 fixed on the fan pipeline and the second flange block 502 fixed on the external pipeline are aligned. The I-shaped sealing ring 504 is clamped and accommodated in the sealing groove 503 that matches the two flange blocks. The high-temperature resistant grease applied to the sealing groove 503 assists in installation and sealing. When the bolts 505 passing through the two flange blocks are tightened, the strong clamping force acts on the I-shaped sealing ring 504, causing it to deform elastically, thereby tightly filling all potential gaps between the sealing groove 503 and the flange blocks. This structure can maintain high airtightness even under the pressure and thermal expansion of high-temperature flue gas, completely solving the safety hazard of toxic high-temperature flue gas leaking from the connection.

[0048] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. High-temperature flue gas high-efficiency guiding and conveying fan, including: Composite protection component (1); The air inlet pipe (2) is fixedly connected to the front of the composite protection component (1); An air outlet pipe (3) is fixedly connected to one side of the composite protection component (1); The motor (4) is installed behind the composite protection component (1); The composite protective component (1) is characterized in that it is composed of a steel base layer (101), a heat insulation layer (102) and a heat-resistant layer (103), wherein the steel base layer (101) is located on the outermost side, the heat insulation layer (102) is fixedly connected to the inner side of the steel base layer (101), and the heat-resistant layer (103) is coated on the inner side of the heat insulation layer (102); The fan also includes sealing components (5) respectively disposed at the ends of the air inlet pipe (2) and the air outlet pipe (3); The sealing assembly (5) includes: a first flange block (501) fixedly connected to the end of the air inlet pipe (2) or the air outlet pipe (3); a second flange block (502) for mating with the first flange block (501); and an I-shaped sealing ring (504) sandwiched between the first flange block (501) and the second flange block (502).

2. The high-temperature flue gas high-efficiency guiding and conveying fan according to claim 1, characterized in that, Both the first flange block (501) and the second flange block (502) are provided with mutually cooperating sealing grooves (503), and the I-shaped sealing ring (504) is accommodated in the sealing groove (503).

3. The high-temperature flue gas high-efficiency guiding and conveying fan according to claim 2, characterized in that, The sealing assembly (5) also includes bolts (505) that pass through the first flange block (501) and the second flange block (502) and press them together.

4. The high-temperature flue gas high-efficiency guiding and conveying fan according to claim 2, characterized in that, The interior of the sealing groove (503) is coated with high-temperature resistant grease.

5. The high-temperature flue gas high-efficiency guiding and conveying fan according to claim 1, characterized in that, The steel base layer (101) is a carbon steel plate.

6. The high-temperature flue gas high-efficiency guiding and conveying fan according to claim 1, characterized in that, The heat insulation layer (102) is made of ceramic fiber.

7. The high-temperature flue gas high-efficiency guiding and conveying fan according to claim 1, characterized in that, The heat-resistant layer (103) is a modified silane coating.

8. The high-temperature flue gas high-efficiency guiding and conveying fan according to claim 1, characterized in that, The fan also includes a base (6), which is fixedly connected to the bottom of the motor (4).

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