Flat centrifugal jet fan

Abstract

The utility model provides a flat centrifugal jet fan, which relates to the technical field of fans and comprises a mounting pipeline, a fan component is mounted at the bottom of the mounting pipeline, and a rectangular air outlet pipe is fixedly connected to one side of the mounting pipeline. The motor works to drive the fan impeller to rotate, airflow enters the rectangular air inlet pipe through the flow equalizing filter screen and then enters the flat type mounting box through the right side of the mounting pipeline, so that the airflow enters the flat type mounting box at a uniform flow rate, and the airflow is conveyed to the left side of the inner cavity of the mounting pipeline through the fan impeller. The whole device is flattened, a plurality of centrifugal jet fans are arranged side by side, airflow distribution is uniform, the jet range is far, noise is low, pollutants can be rapidly discharged, the air quality in a tunnel is ensured, two sets of fixing bolts are disassembled, the working end of a special tunnel mounting vehicle is operated to descend, and a flat mounting box is moved out of a mounting groove. And then cleaning and maintaining are carried out.

Description

Technical Field

[0001] This utility model relates to the field of fan technology, and in particular to a flat centrifugal jet fan. Background Technology

[0002] To ensure air circulation, safety, and environmental comfort within the tunnel, fans are typically suspended from the top of the tunnel walls. These fans are used to maintain airflow within the spiral tunnel, for fire smoke extraction and emergency ventilation, and to dilute pollutants. Some flat tunnels require the installation of flat centrifugal jet fans.

[0003] However, in existing technologies, the jet fan is usually directly suspended from the top of the tunnel wall by steel cables and rods. This results in a short range and high noise. Furthermore, directly suspending the jet fan with steel cables and rods makes disassembly difficult and maintenance and cleaning inconvenient. Utility Model Content

[0004] The purpose of this invention is to solve the problems existing in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a flat centrifugal jet fan, comprising: an installation pipe, a fan assembly installed at the bottom of the installation pipe, a rectangular air outlet pipe fixedly connected to one side of the installation pipe, a rectangular air inlet pipe fixedly connected to the other side of the installation pipe, a flow equalization filter screen installed at one end of the inner cavity of the rectangular air inlet pipe, and a porous aluminum foam board fixedly attached to the inner walls of the installation pipe, the fan assembly, the rectangular air outlet pipe, and the rectangular air inlet pipe.

[0006] In a preferred embodiment, an installation groove is provided through the center of the bottom of the installation pipe, and a set of threaded grooves are provided on both sides of the bottom of the installation pipe, with the two sets of threaded grooves located on both sides of the installation groove.

[0007] In a preferred embodiment, the fan assembly includes a flat mounting box that is movably embedded inside a mounting groove. The top of the flat mounting box is fitted with the top of the inner cavity of the mounting groove, the two sides of the flat mounting box are tightly fitted with the two sides of the inner cavity of the mounting groove, and the other two ends of the flat mounting box are tightly fitted with the other two ends of the inner cavity of the mounting groove.

[0008] In a preferred embodiment, the flat mounting box has a through opening on one side and multiple air inlets on the other side. The multiple air inlets are divided into groups of two, and a motor is fixedly installed in the middle between the opposite sides of two adjacent groups of air inlets. The output ends of the multiple motors are fixedly connected to fan impellers.

[0009] In a preferred embodiment, the trailing edges of the blades of the plurality of wind turbine impellers are provided with serrated grooves.

[0010] In a preferred embodiment, the bottom of both sides of the flat mounting box is fixedly connected with a fixing inclined plate. A set of fixing bolts is threaded through the bottom of each of the two fixing inclined plates. The tops of the two fixing inclined plates are respectively attached to the two sides of the bottom of the mounting pipe. The other ends of the two sets of fixing bolts are respectively movably embedded in the two sets of threaded grooves.

[0011] In a preferred embodiment, a limiting plate is fixedly connected around one end of the inner cavity of the rectangular air intake pipe, and one side of the flow equalization filter is in contact with one side of the limiting plate.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0013] 1. In this utility model, the motor drives the fan impeller to rotate. At this time, the sawtooth groove disrupts the uniformity of the vortex and disperses the noise energy, thereby reducing the noise of the airflow. The airflow enters the interior of the rectangular air inlet pipe through the flow equalization filter, and then enters the interior of the flat installation box through the right side of the installation pipe, so that the gas flow rate is uniform. The airflow is transported to the left side of the inner cavity of the installation pipe by the working of the fan impeller, and then discharged through the rectangular air outlet pipe. The device is flat overall, with multiple centrifugal jet fans arranged side by side, the airflow organization is uniform, the range is long, the noise is low, and pollutants can be quickly discharged to ensure the air quality in the tunnel.

[0014] 2. When the device needs to be disassembled and maintained, a tunnel-specific installation vehicle is used to push the bottom of the flat installation box, then the two sets of fixing bolts are removed, the working end of the tunnel-specific installation vehicle is lowered, the flat installation box is moved out of the installation slot, and then cleaning and maintenance work can be carried out. Attached Figure Description

[0015] Figure 1 A three-dimensional structural diagram of a flat centrifugal jet fan provided by this utility model;

[0016] Figure 2 A side view of a flat centrifugal jet fan provided by this utility model;

[0017] Figure 3 A schematic diagram of the internal structure of a fan assembly for a flat centrifugal jet fan provided by this utility model;

[0018] Figure 4 Side view of the internal structure of the fan assembly of a flat centrifugal jet fan provided by this utility model;

[0019] Figure 5Side view of the internal structure of the air inlet pipe of a flat centrifugal jet fan provided by this utility model;

[0020] Figure 6 A schematic diagram of the flow equalization filter structure of a flat centrifugal jet fan provided by this utility model.

[0021] Legend:

[0022] 1. Installation pipe; 101. Installation groove; 102. Threaded groove; 2. Fan assembly; 201. Flat mounting box; 202. Through port; 203. Air inlet window; 204. Motor; 205. Fan impeller; 206. Serrated groove; 207. Fixing inclined plate; 208. Fixing bolt; 3. Rectangular air outlet pipe; 4. Rectangular air inlet pipe; 401. Limiting plate; 5. Flow equalization filter. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-6 This utility model provides a technical solution: a flat centrifugal jet fan, comprising: an installation pipe 1, a fan assembly 2 installed at the bottom of the installation pipe 1, a rectangular air outlet pipe 3 fixedly connected to one side of the installation pipe 1, a rectangular air inlet pipe 4 fixedly connected to the other side of the installation pipe 1, a flow equalization filter 5 installed at one end of the inner cavity of the rectangular air inlet pipe 4, and a porous foam aluminum plate (not shown in the attached drawings) fixedly attached to the inner walls of the installation pipe 1, the fan assembly 2, the rectangular air outlet pipe 3, and the rectangular air inlet pipe 4.

[0025] Specifically: The device connects to an external power supply via a line to provide power to the internal electrical components. The left side of the installation duct 1 has an inclination of about 5-15 degrees and is designed as a flat, gradually expanding tube. By increasing the cross-sectional area, the high-speed airflow is slowed down, and some dynamic pressure is converted into static pressure, preventing the high-speed airflow from directly impacting the duct. At the same time, the internal porous aluminum foam board is used to reduce noise and vibration. The rectangular air outlet pipe 3 is used to increase the length of the left side of the installation duct 1, making the air delivery more stable. The left side of the installation duct 1 has an inclination of about 20-30 degrees and is designed as a flat, gradually narrowing tube, which increases the air intake speed and enhances the negative pressure suction capacity. The rectangular air inlet pipe 4 is used to increase the length of the right side of the installation duct 1. Together with the flow equalization filter 5, it delivers air evenly to the right side of the inner cavity of the installation duct 1, so that the gas flow rate is uniform, increasing the wind speed, enhancing the suction capacity, and concentrating the airflow. At the same time, the flow equalization filter 5 is used to reduce airflow noise and filter out large, lightweight objects carried in the airflow.

[0026] In one embodiment, an installation groove 101 is provided through the center of the bottom of the installation pipe 1, and a set of threaded grooves 102 are provided on both sides of the bottom of the installation pipe 1, with the two sets of threaded grooves 102 located on both sides of the installation groove 101.

[0027] Specifically: the mounting groove 101 is used to limit the installation of the fan assembly 2, and the threaded groove 102 is used to connect and fix the flat mounting box 201 with the fixing bolt 208.

[0028] In one embodiment, the fan assembly 2 includes a flat mounting box 201, which is movably embedded inside the mounting groove 101. The top of the flat mounting box 201 is in contact with the top of the inner cavity of the mounting groove 101, the two sides of the flat mounting box 201 are in close contact with the two sides of the inner cavity of the mounting groove 101, and the other two ends of the flat mounting box 201 are in close contact with the other two ends of the inner cavity of the mounting groove 101.

[0029] Specifically: the flat mounting box 201 forms the middle section of the duct through which airflow passes, and is also used to install and fix the motor 204 and the fan impeller 205.

[0030] In one embodiment, a through opening 202 is provided on one side of the flat mounting box 201, and multiple air inlets 203 are provided on the other side of the flat mounting box 201. The multiple air inlets 203 are divided into groups of two, and a motor 204 is fixedly installed in the middle between the opposite sides of two adjacent groups of air inlets 203. The output ends of the multiple motors 204 are fixedly connected to fan impellers 205.

[0031] Specifically: the air inlet 203 is used for air intake, the outlet 202 is used for exhaust, the motor 204 drives the fan impeller 205 to rotate at high speed, draws airflow from the right side of the installation pipe 1 and then discharges it from the left side of the installation pipe 1.

[0032] In one embodiment, the trailing edges of the blades of multiple wind turbine impellers 205 are provided with serrated grooves 206.

[0033] Specifically: the motor 204 drives the fan impeller 205 to rotate at high speed to generate centrifugal force for ventilation and air delivery. The serrated groove 206 is used to disrupt the consistency of the vortex and disperse noise energy, thereby reducing the noise of airflow.

[0034] In one embodiment, the bottom of both sides of the flat mounting box 201 is fixedly connected with a fixing inclined plate 207. The bottom of the two fixing inclined plates 207 is threaded through and embedded with a set of fixing bolts 208. The top of the two fixing inclined plates 207 is respectively attached to the two sides of the bottom of the mounting pipe 1. The other ends of the two sets of fixing bolts 208 are respectively movably embedded in the interior of the two sets of threaded grooves 102.

[0035] Specifically: the other end of the fixing bolt 208 is not embedded inside the installation pipe 1, and the fixing bolt 208 fixes the flat installation box 201 inside the installation groove 101 through the fixing inclined plate 207.

[0036] In one embodiment, one end of the inner cavity of the rectangular air intake pipe 4 is fixedly connected to a limiting plate 401, and one side of the flow equalization filter 5 is attached to one side of the limiting plate 401.

[0037] Specifically: On the other hand, the flow equalization filter 5 is used to improve airflow uniformity, reduce turbulence and eddies, thereby improving system performance and stability.

[0038] Working principle: The top of the installation pipe 1, rectangular air outlet pipe 3, and rectangular air inlet pipe 4 are suspended from the top of the tunnel using external steel cables and rods. Then, the device is connected to an external power source. At this time, the motor 204 drives the fan impeller 205 to rotate. At this time, the sawtooth groove 206 disrupts the uniformity of eddy currents and disperses noise energy, thereby reducing the noise of airflow. The airflow enters the interior of the rectangular air inlet pipe 4 through the flow equalization filter 5, and then enters the interior of the flat installation box 201 through the right side of the installation pipe 1, so that the gas flow rate is uniform, increasing the wind speed, enhancing the suction capacity, and concentrating the airflow. At the same time, the flow equalization filter 5 reduces turbulence and eddy currents, thereby improving the system performance and stability and reducing airflow noise.

[0039] The airflow is delivered to the left side of the inner cavity of the installation pipe 1 by the working impeller 205 of the fan, and then discharged through the rectangular air outlet pipe 3. At this time, the airflow is guided and diffused through the inner cavity of the left side of the installation pipe 1, which slows down the high-speed airflow and converts part of the dynamic pressure into static pressure, avoiding the high-speed airflow from directly impacting the pipe. At the same time, the porous foam aluminum plate inside reduces noise and vibration. At this time, the rectangular air outlet pipe 3 increases the length of the left side of the installation pipe 1, making the air delivery more stable.

[0040] With this setup, the device is flattened as a whole, and multiple centrifugal jet fans are arranged side by side, resulting in uniform airflow, long range, low noise, and rapid removal of pollutants, ensuring air quality inside the tunnel.

[0041] When the device needs to be disassembled and maintained, use a tunnel-specific installation vehicle to push up the bottom of the flat installation box 201, then remove the two sets of fixing bolts 208, operate the working end of the tunnel-specific installation vehicle to lower, and move the flat installation box 201 out of the installation slot 101, and then carry out cleaning and maintenance work.

[0042] This setup allows for quick disassembly of the fan module, and its simple design makes maintenance and cleaning easy.

[0043] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A flat centrifugal jet fan, characterized by, The utility model relates to a kind of air supply device, including: The bottom of installation pipeline (1) is provided with fan assembly (2) installed, one side of installation pipeline (1) is fixedly connected with rectangular air outlet pipe (3), the other side of installation pipeline (1) is fixedly connected with rectangular air inlet pipe (4), the inner chamber of rectangular air inlet pipe (4) one end is provided with uniform flow filter screen (5) installed, the inner wall of installation pipeline (1), fan assembly (2), rectangular air outlet pipe (3), rectangular air inlet pipe (4) is all fixedly connected with porous aluminum foam plate.

2. A flat centrifugal jet fan according to claim 1, characterized in that: The center of the bottom of installation pipeline (1) is throughly provided with installation groove (101), the both sides of installation pipeline (1) bottom are all provided with a group of thread grooves (102), and two groups of thread grooves (102) are located at the both sides of installation groove (101) respectively.

3. A flat centrifugal jet fan according to claim 2, characterized in that: The fan assembly (2) includes a flat mounting box (201), which is movably embedded in the inner part of the installation groove (101). The top of the flat mounting box (201) is tightly fitted with the top of the inner chamber of the installation groove (101). The both sides of the flat mounting box (201) are tightly fitted with the both sides of the inner chamber of the installation groove (101). The other two ends of the flat mounting box (201) are tightly fitted with the other two ends of the inner chamber of the installation groove (101).

4. A flat centrifugal jet fan according to claim 3, characterized in that: The one side of the flat mounting box (201) is throughly provided with a through opening (202), and the other side of the flat mounting box (201) is provided with a plurality of air inlet windows (203). Every two of the plurality of air inlet windows (203) are divided into a group. The middle part between the opposite sides of the adjacent two groups of air inlet windows (203) is fixedly installed with a motor (204). The output end of the plurality of motors (204) is fixedly connected with a fan impeller (205).

5. A flat centrifugal jet fan according to claim 4, characterized in that: The blade tail edge of the plurality of fan impellers (205) is provided with a sawtooth groove (206).

6. A flat centrifugal jet fan according to claim 4, characterized in that: The bottom of the both sides of the flat mounting box (201) is fixedly connected with a fixed inclined plate (207). The bottom of the two fixed inclined plates (207) is threadedly penetrated and embedded with a group of fixed bolts (208). The top of the two fixed inclined plates (207) is respectively fitted with the both sides of the bottom of the installation pipeline (1). The other end of the two groups of fixed bolts (208) is respectively movably embedded in the inner part of the two groups of thread grooves (102).

7. A flat centrifugal jet fan according to claim 1, characterized in that: The inner chamber of the rectangular air inlet pipe (4) is fixedly connected with a limiting plate (401) at one end. The one side of the uniform flow filter screen (5) is fitted with the one side of the limiting plate (401).

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