Framework structure and negative pressure fan

Abstract

The utility model discloses a framework structure which is used for a negative pressure fan and comprises an air gathering barrel and a plurality of supports. The air gathering barrel comprises an air guide cover, a middle barrel and an air duct barrel; the wind scooper has a streamline structure; one side of the wind scooper is spliced with one side of the middle cylinder, and the other side of the middle cylinder is spliced with one side of the air duct cylinder; the support is provided with a wing-shaped structure, and the tail end of the support is connected with the middle cylinder. The air gathering barrel is assembled in a splicing mode, installation convenience is improved, the support is provided with a wing-shaped structure, resistance in the fan starting process can be reduced, the working efficiency of the negative pressure fan is improved, and the service life is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to negative pressure fan technical field, more particularly is a framework structure. BACKGROUND

[0002] The negative pressure fan is a kind of machine that can improve any ventilation problem, and the cooling and ventilation effect can reach 90%-97%, by the natural suction of fresh air through the opposite door or window of installation site, the hot air in the room is forced to discharge outside.

[0003] The framework structure of the prior art has some drawbacks, as shown in the Chinese utility model patent No.CN214742228U, a high negative pressure fan with butterfly valve for pig farm, including high negative pressure fan body, the high negative pressure fan body center position is equipped with motor, motor one end is equipped with blade, its characterized in that: the high negative pressure fan body is close to the one end of blade and is equipped with the wind collecting barrel, the wind collecting barrel is equipped with protective net away from the one end of high negative pressure fan body, high negative pressure fan body and wind collecting barrel between are equipped with butterfly valve, the butterfly valve includes butterfly valve body, baffle, first reinforcing plate, first valve leaf, second valve leaf, first stainless steel bolt hinge, second stainless steel bolt hinge, pin shaft, bushing and U-shaped rod, butterfly valve body is approximately circular, the center position of butterfly valve body is installed with baffle, baffle and butterfly valve body are fixedly connected by welding, baffle is installed with first valve leaf and second valve leaf away from high negative pressure fan body side, first valve leaf and second valve leaf are semicircular, first valve leaf and second valve leaf are symmetrically distributed with baffle center as the center of symmetry, first valve leaf and second valve leaf are installed with first reinforcing plate on the side close to baffle, first valve leaf and second valve leaf are fixedly connected with first reinforcing plate by welding, first valve leaf is installed with first stainless steel bolt hinge on the side away from high negative pressure fan body, first stainless steel bolt hinge has two and is located at the position close to baffle both ends respectively, second valve leaf is installed with second stainless steel bolt hinge on the position corresponding to first stainless steel bolt hinge, first stainless steel bolt hinge and second stainless steel bolt hinge are fixedly connected with first valve leaf and second valve leaf by bolt, first stainless steel bolt hinge and second stainless steel bolt hinge are installed with pin shaft, baffle is fixedly installed with bushing on the position corresponding to pin shaft, bushing is respectively sleeved on one end of pin shaft, bushing is rotatably connected with pin shaft, the other end of pin shaft is connected through U-shaped rod.

[0004] The applicant found that the framework structure of the patent has some drawbacks. Specifically, the existing framework structure design section encounters a large obstacle when air passes through, which generates a large wind resistance, thereby affecting the working efficiency of the fan. UTILITY MODEL CONTENTS

[0005] In order to overcome the above technical defects, the utility model provides a framework structure.

[0006] In order to solve the above problems, the utility model discloses the following technical scheme:

[0007] A framework structure for negative pressure fan, comprising: wind collecting cylinder and several supports,

[0008] The wind collecting cylinder comprises a wind deflector, a middle cylinder and a wind channel cylinder.

[0009] The wind deflector has a streamline structure, the middle cylinder is a hollow cylindrical structure, one end of the middle cylinder is open and spliced with the wind deflector, and the other end of the middle cylinder is open and spliced with the wind channel cylinder.

[0010] The support is provided with an airfoil structure, and the support is connected with the inner wall of the middle cylinder.

[0011] Preferably, the airfoil structure comprises a U-shaped plate, a flat cover plate and a wing-shaped cover plate.

[0012] One side of the U-shaped plate is connected with a motor, and the other side of the U-shaped plate is connected with the inner wall of the middle cylinder.

[0013] The inner surface of the flat cover plate is attached to the U-shaped plate.

[0014] Both sides of the wing-shaped cover plate are provided with clamping channels matched with both sides of the flat cover plate.

[0015] The wing-shaped cover plate covers the flat cover plate, and the U-shaped plate and the wing-shaped cover plate are connected to form a cavity.

[0016] Preferably, the wind channel cylinder comprises several H-shaped rods and several arc-shaped plates.

[0017] One end of the H-shaped rod is connected with the middle cylinder, and the other end is connected with a second protective net.

[0018] The H-shaped rods are spliced into the wind channel cylinder between the arc-shaped plates.

[0019] The wind channel cylinder is trumpet-shaped, and the small-diameter end of the wind channel cylinder is spliced with the middle cylinder.

[0020] Preferably, the second protective net is provided with a regularly arranged grid structure, and the H-shaped rod, the arc-shaped plate and the second protective net are made of stainless steel.

[0021] Preferably, a protective fence is arranged on the outer wall of the middle cylinder, and the protective fence is made of stainless steel.

[0022] Preferably, a first protective net is arranged on the wind deflector, and the first protective net is made of stainless steel.

[0023] Preferably, the bracket is made of stainless steel.

[0024] The second aspect of the utility model provides a kind of negative pressure fan, it is characterized in that, the kind of negative pressure fan includes the framework structure described in the first aspect of the utility model embodiment.

[0025] The motor is arranged in the negative pressure fan, and the motor is connected with a plurality of fan blades.

[0026] The fan blade is provided with a bionic structure.

[0027] Compared with the prior art, the utility model has the beneficial effects that:

[0028] A framework structure for a negative pressure fan, comprising: a wind collecting barrel and a plurality of brackets.

[0029] The wind collecting barrel comprises a wind guide cover, a middle barrel and an air duct barrel; the wind guide cover is provided with a streamline structure; one side of the wind guide cover is spliced with one side of the middle barrel, and the other side of the middle barrel is spliced with one side of the air duct barrel; the bracket is provided with an airfoil structure, and the end of the bracket is connected with the middle barrel.

[0030] The wind collecting barrel is assembled by splicing, which improves the convenience of installation; the bracket is provided with an airfoil structure, which can reduce the resistance during the starting process of the fan, improve the working efficiency of the negative pressure fan, and prolong the service life. BRIEF DESCRIPTION OF DRAWINGS

[0031] The specific embodiments of the utility model will be described in further detail below with reference to the drawings, wherein:

[0032] Figure 1 is a structural schematic view of a framework structure of the utility model;

[0033] Figure 2 is another perspective structural schematic view of a framework structure of the utility model;

[0034] Figure 3 is a structural schematic view of a wind collecting barrel in the framework structure of the utility model;

[0035] Figure 4 is a front view and sectional view structural schematic view of a wind guide cover in the framework structure of the utility model;

[0036] Figure 5 is a structural schematic view of a bracket in the framework structure of the utility model;

[0037] Figure 6 is a parts schematic view of a bracket in the framework structure of the utility model;

[0038] Figure 7It is a horn-shaped structure schematic view of the air duct cylinder in the framework structure.

[0039] Figure 8 It is a structure schematic view of the air duct cylinder in the framework structure.

[0040] Figure 9 It is Figure 8 The enlarged schematic view of the middle A part.

[0041] Figure 10 It is a combined structure schematic view of the motor and the fan blade in the negative pressure fan.

[0042] Figure 11 It is a structure schematic view of three fan blades in the negative pressure fan.

[0043] Figure 12 It is a structure schematic view of six fan blades in the negative pressure fan.

[0044] In the figure: 1 - air collecting cylinder, 10 - air guide cover, 11 - first protective net, 20 - middle cylinder, 21 - protective fence, 30 - air duct cylinder, 31 - H-shaped rod, 32 - arc-shaped plate, 33 - second protective net, 2 - support, 201 - U-shaped plate, 202 - flat cover plate, 203 - wing-shaped cover plate, 3 - motor, 4 - fan blade, 401 - sawtooth groove, 402 - center column. DETAILED DESCRIPTION

[0045] The preferred embodiments of the utility model are described below in combination with the drawings, and it should be understood that the preferred embodiments described here are only used for explaining and interpreting the utility model, and are not used for limiting the utility model.

[0046] As Figures 1-9 shown, the framework structure of the utility model is used for negative pressure fan, including: air collecting cylinder 1 and a plurality of supports 2;The air collecting cylinder 1 includes air guide cover 10, middle cylinder 20 and air duct cylinder 30;The air guide cover 10 has streamline structure;One side of the air guide cover 10 is spliced with one side of the middle cylinder 20, and the other side of the middle cylinder 20 is spliced with one side of the air duct cylinder 30;The support 2 is provided with wing structure, and the end of the support 2 is connected with the middle cylinder 20.

[0047] It can be understood that, as Figures 1-2 shown, one side of the air guide cover 10 is spliced with one side of the middle cylinder 20, and the other side of the middle cylinder 20 is spliced with one side of the air duct cylinder 30, in the process of installing the fan, the fan is facilitated to be assembled, subsequent repair and maintenance are facilitated, and production efficiency is improved.

[0048] As Figures 1-4As shown, the air deflector 10 is provided with a streamlined structure, and the outer shape of the streamlined structure presents a smooth curve. Further as shown Figure 4 As shown, the cross-sectional profile of the air deflector 10 is arc-shaped, and the surface is free of protruding edges and tips, which can better contact with the gas and reduce the resistance. One side of the air deflector 10 is spliced with one side of the middle cylinder 20, and in the process of starting the negative pressure fan, the gas enters the inside along the smooth outer curve of the streamlined structure of the air deflector 10. The fluid mechanics performance of the streamlined structure is extremely high, which can reduce the resistance of air flow and improve the efficiency of the fan.

[0049] Optionally, as shown Figures 5-6 As shown, the airfoil-shaped structure includes a U-shaped plate 201, a flat cover plate 202, and an airfoil cover plate 203; one side of the U-shaped plate 201 is connected with the motor 3, and the other side of the U-shaped plate 201 is connected with the inner wall of the middle cylinder 20; the inner surface of the flat cover plate 202 is attached to the U-shaped plate 201; the airfoil cover plate 203 is provided with a clamping channel 204 on both sides which is adapted to the two sides of the flat cover plate 202; the airfoil cover plate 203 covers the flat cover plate 202; the U-shaped plate 201 and the airfoil cover plate 203 are connected to form a cavity. The bracket 2 is made of stainless steel.

[0050] In order to optimize the air flow and improve the working efficiency of the fan, in the utility model, specifically, the airfoil-shaped structure is used to improve the air flow efficiency of the fan. The specific structure includes a U-shaped plate 201, a flat cover plate 202, and an airfoil cover plate 203, and the specific configuration is as follows:

[0051] The U-shaped plate 201 is a metal plate with a U-shaped cross section, and one side of the U-shaped plate 201 is connected with the motor 3. The motor 3 is fixedly connected in the negative pressure fan through the U-shaped plate 201, and is used to drive the negative pressure fan to work. The other side of the U-shaped plate 201 is fixedly connected with the inner wall of the middle cylinder 20 to form a support structure, which ensures the overall stability of the airfoil-shaped structure.

[0052] The inner surface of the flat cover plate 202 is attached to the upper surface of the U-shaped plate 201, which plays a sealing role and reduces the cross-sectional area of the bracket 2 as a whole, so that the air flow is smoother when the fan starts, and the air flow resistance is reduced.

[0053] The airfoil cover plate 203 has a streamlined shape, which can more effectively guide the air flow to reduce air resistance and thus improve the overall efficiency of the fan.

[0054] The airfoil cover plate 203 is provided with a clamping channel 204 on both sides which is adapted to the two sides of the flat cover plate 202, and the clamping channel 204 is designed to adapt and fix the connection between the airfoil cover plate 203 and the flat cover plate 202, so as to ensure the stability of the structure and prevent loosening.

[0055] The airfoil cover 203 covers the flat cover 202 and forms a cavity structure through its connection with the U-shaped plate 201. This cavity can hide the cable of the motor 3, providing dustproof, waterproof, and low wind resistance protection, while also protecting the cable of the motor 3 and extending the service life of the fan.

[0056] The bracket 2 features an airfoil structure to achieve low wind resistance. Made of stainless steel, bracket 2 offers high strength and corrosion resistance. The entire bracket 2 is bolted together for easy installation and maintenance. Bracket 2 serves to prevent dust and water damage and reduces wind resistance, while also protecting the cables and extending the fan's lifespan.

[0057] Optional, such as Figure 2 As shown, a protective railing 21 is provided on the outer wall of the middle cylinder 20, and the protective railing is made of stainless steel.

[0058] Understandably, installing a stainless steel protective railing 21 around the outer wall of the middle cylinder 20 provides further protection for the middle cylinder 20, making its structure more stable, effectively preventing external damage from affecting the use of the equipment inside the middle cylinder 20, and extending the service life of the fan.

[0059] Optional, such as Figure 1 As shown, the air guide cover 10 is provided with a first protective net 11, which is made of stainless steel.

[0060] Understandably, the first protective net 11 is made of stainless steel, which has good corrosion resistance, heat resistance, low-temperature strength, and mechanical properties; it also has good hot workability such as stamping and bending, and does not exhibit heat treatment hardening. In one embodiment, the first protective net 11 is made of stainless steel. It serves a safety protection function; the first protective net 11 installed on the air guide shroud 10 can prevent external objects, impurities, or animals from entering the fan, avoiding damage to the fan blades 4, motor 3, or other components, and protecting the safe operation of the fan.

[0061] Optionally, the air duct 30 includes several H-shaped rods 31 and several arc-shaped plates 32; one end of the H-shaped rod 31 is connected to the middle cylinder 20, and the other end is connected to the second protective net 33; the several arc-shaped plates 32 are spliced ​​together by the H-shaped rods 31 to form the air duct 30; the air duct 30 is trumpet-shaped, and the end of the air duct 30 with the smaller diameter is spliced ​​to the middle cylinder 20.

[0062] Understandably, such as Figures 7-9As shown, several arc-shaped plates 32 are spliced into the air duct cylinder 30 through the H-shaped rods 31, in an embodiment, the two sides of the H-shaped rod 31 are provided with notches, one side of the first arc-shaped plate 32 is embedded into one notch of the H-shaped rod 31, one side of the second arc-shaped plate 32 is embedded into the other notch of the H-shaped rod 31, the other end of the second arc-shaped plate 32 is embedded into the side notch of the second H-shaped rod 31, until the arc-shaped plates 32 and the H-shaped rods 31 are spliced into the air duct cylinder 30, the H-shaped rods 31 and the arc-shaped plates 32 are fixed by rivets. The air duct cylinder 30 is trumpet-shaped, and the end with a small caliber of the air duct cylinder 30 is spliced with the middle cylinder 20. The trumpet-shaped air duct cylinder 30 is beneficial to the efficient exhaust of the fan, and the fan can more effectively concentrate and discharge air, thereby improving the efficiency of the fan. Compared with the traditional fan, the air duct cylinder 30 can make the noise generated by the fan during operation lower.

[0063] The second protective net 33 is provided with a regularly arranged grid structure, and the H-shaped rods 31, the arc-shaped plates 32 and the second protective net 33 are made of stainless steel.

[0064] It can be understood that stainless steel has good corrosion resistance, heat resistance, low temperature strength and mechanical properties; and good hot workability such as stamping and bending, and no hardening phenomenon after heat treatment. In an embodiment, the H-shaped rods 31 and the arc-shaped plates 32 are made of stainless steel, so that the structure of the air duct cylinder 30 is more stable and is not easy to be deformed due to external force. The second protective net 33 made of stainless steel is provided with a regularly arranged grid structure and is installed at the air outlet of the air duct cylinder 30, which can play a role of double-layer safety protection for the internal structure of the negative pressure fan. The structure is more stable, and the service life of the fan is prolonged.

[0065] The second aspect embodiment of the utility model provides a kind of negative pressure fan, it is characterized in that, the negative pressure fan include the framework structure of the first aspect of the utility model embodiment.

[0066] Optionally, as shown in Figures 10-11 As shown, the motor 3 is arranged in the negative pressure fan, and the motor 3 is connected to a plurality of fan blades 4; the fan blade 4 is provided with a bionic structure.

[0067] It can be understood that, as shown in Figure 11 As shown, the fan blade 4 is provided with a bionic structure, which simulates the wing tail of birds. The fan blade 4 is provided with a plurality of sawtooth grooves 401 at the tail. The sawtooth grooves 401 are arranged at equal distances according to the shape of the fan blade. The equidistant sawteeth cut and comb the large vortex generated at the air outlet into countless small vortexes, effectively separate and guide the viscous airflow generated at the root of the fan blade 4, so that it becomes ideal airflow. The fan blade 4 is made of a circular arc thin plate, and the outer shape of the fan blade 4 is a sickle-shaped with a wide outer diameter and a narrow inner diameter, and a three-dimensional twisted shape. The fan blade makes full use of the characteristics of large circumferential speed at the outer diameter to improve the work capacity of the fan blade, and reduces the noise during use of the fan.

[0068] In one embodiment, the motor 3 is connected to three fan blades 4. The fan with three fan blades 4 has low noise and low motor load during operation.

[0069] In another embodiment, such as Figure 12 As shown, motor 3 is connected to six fan blades 4. The six fan blades 4 output greater air force and have a wider air delivery range. The fan blades 4 cut the air into smaller pieces, resulting in a much gentler airflow and a larger air delivery range.

[0070] like Figure 11 As shown, a central column 402 is provided at the center of the fan blade 4. The central column 402 is bullet-shaped. The bullet-shaped central column 402 can reduce air resistance. The fan blade 4 is located at the front end of the motor 3, close to the air guide shroud 10, which reduces dynamic pressure loss and improves the performance of the fan.

[0071] The working principle of the skeleton structure described in this utility model is as follows:

[0072] One side of the air guide shroud 10 is spliced ​​to one side of the middle cylinder 20, and the other side of the middle cylinder 20 is spliced ​​to one side of the air duct 30. This facilitates fan assembly during installation, subsequent repair and maintenance, and improves production efficiency. The air guide shroud 10 has a streamlined structure with excellent hydrodynamic performance, which reduces airflow resistance and improves fan efficiency.

[0073] The first protective net 11 installed on the air guide cover 10 can prevent external objects, impurities or animals from entering the fan, avoid damaging the fan blades 4 and motor 3 or other components, and protect the safe operation of the fan.

[0074] In the support structure 2, the motor 3 is bolted to one side of the U-shaped plate 201, and the other side of the U-shaped plate 201 is bolted to the inner wall of the middle cylinder 20, facilitating installation and maintenance. The inner surface of the flat cover plate 202 is riveted to one side of the U-shaped plate 201. The airfoil cover plate 203 has slots 204 on both sides that fit the flat cover plate 202, allowing the airfoil cover plate 203 to cover the flat cover plate 202, thus connecting the U-shaped plate 201 and the airfoil cover plate 203 to form a cavity. The airfoil structure of the support 2 enables the fan to achieve low wind resistance. With stainless steel as the frame, the airfoil cover plate 203 wraps around the flat cover plate 202, achieving a corrosion-resistant and high-strength support 2 while reducing wind resistance. Simultaneously, the cables can be hidden within the cavity of the support 2, providing dust and water protection and low wind resistance, while also protecting the cables and extending the fan's service life.

[0075] A circle of stainless steel guard rail 21 is arranged on the outer wall of the middle cylinder 20, which further protects the middle cylinder 20, and makes the structure of the middle cylinder 20 more stable, and effectively prevents external damage from affecting the use of the equipment inside the middle cylinder 20.

[0076] The arc-shaped plates 32 and the H-shaped rods 31 are spliced together to form the air duct cylinder 30, and the H-shaped rods 31 and the arc-shaped plates 32 are fixed by rivets. The air duct cylinder 30 is trumpet-shaped, and the end with a small caliber is spliced with the middle cylinder 20. The trumpet-shaped air duct cylinder 30 is beneficial to the efficient exhaust of the fan, and the fan can more effectively concentrate and discharge air, thereby improving the efficiency of the fan. Compared with the traditional fan, the air duct cylinder 30 can make the noise generated by the fan during operation lower.

[0077] The air duct 1 is assembled by splicing, which improves the convenience of installation and the production efficiency. The support 2 is provided with a wing-shaped structure, which can protect the cable and reduce the resistance during the starting process of the fan, improve the efficiency of the fan, and prolong the service life.

[0078] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Any modification, equivalent change and modification of the above embodiment according to the technical essence of the present application, which does not deviate from the technical solution content of the present application, still belongs to the scope of the technical solution of the present application.

Claims

1. A skeleton structure for a negative pressure fan, characterized by, The skeleton structure comprises: a wind funnel (1) comprising a wind guide cover (10), a middle cylinder (20) and a wind channel cylinder (30); the wind guide cover (10) has a streamlined structure; the middle cylinder (20) is a hollow cylindrical structure, one end of the middle cylinder (20) is open and spliced with the wind guide cover (10), and the other end of the middle cylinder (20) is open and spliced with the wind channel cylinder (30); a plurality of supports (2) provided with a wing-shaped structure, the supports (2) are connected with the inner wall of the middle cylinder (20).

2. The framework structure of claim 1, wherein, the wing-shaped structure comprises: a U-shaped plate (201), one side of the U-shaped plate (201) is connected with a motor (3), and the other side of the U-shaped plate (201) is connected with the inner wall of the middle cylinder (20); a flat cover plate (202), the inner surface of the flat cover plate (202) is attached to the U-shaped plate (201); a wing-shaped cover plate (203), both sides of the wing-shaped cover plate (203) are provided with clamping channels (204) matched with both sides of the flat cover plate (202); wherein the wing-shaped cover plate (203) covers the flat cover plate (202), and the U-shaped plate (201) and the wing-shaped cover plate (203) are connected to form a cavity.

3. The framework structure of claim 1, wherein, the wind channel cylinder (30) comprises: a plurality of H-shaped rods (31), one end of each of the H-shaped rods (31) is connected with the middle cylinder (20), and the other end of each of the H-shaped rods (31) is connected with a second protective net (33); a plurality of arc-shaped plates (32), the H-shaped rods (31) are spliced between the arc-shaped plates (32) to form the wind channel cylinder (30); wherein the wind channel cylinder (30) has a horn shape, and the end of the wind channel cylinder (30) with a small caliber is spliced with the middle cylinder (20).

4. The skeleton structure according to claim 3, wherein the second protective net (33) is provided with a regularly arranged grid structure, and the H-shaped rods (31), the arc-shaped plates (32) and the second protective net are made of stainless steel.

5. The skeleton structure according to claim 1, wherein a protective fence (21) is arranged on the outer wall of the middle cylinder (20), and the protective fence (21) is made of stainless steel.

6. The skeleton structure according to claim 1, wherein a first protective net (11) is arranged on the wind guide cover (10), and the first protective net (11) is made of stainless steel.

7. The skeleton structure according to claim 1, wherein the support (2) is made of stainless steel.

8. A negative pressure fan characterized by The skeleton structure of any one of claims 1-7; the motor (3) is arranged in the negative pressure fan, and the motor (3) is connected with a plurality of fan blades (4); the fan blades (4) are provided with a bionic structure.

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