Centrifugal fan that can be easily disassembled

Abstract

The utility model discloses a centrifugal fan which is easy to disassemble, including a fan casing. The middle part of the fan casing is designed as a hollow structure. Internal threaded parts are arranged inside both sides of the hollow groove of the fan casing, and external fixing rings are arranged on both sides of the fan casing. The external fixing ring is fixedly installed with an internal threaded ring close to the inner wall of one side of the fan casing. The internal threaded ring and the internal threaded part are threadedly connected. No less than four groups of first-level positioning holes are opened on the outer walls of both sides of the fan casing. The first-level positioning holes are distributed in a circle with equal spacing. First-level fixing holes matched with the first-level positioning holes are opened on the outer wall of the external fixing ring. The utility model only needs to remove the bolts in the triangular guard frame first, and then remove the external fixing ring. The utility model has the use characteristic of quick disassembly, which greatly improves the maintenance efficiency and saves time and labor costs. The centrifugal fan of the utility model has the technical effects of quick installation and quick disassembly when actually used, and the overall structure is simple, the manufacturing and maintenance costs are low, and it is suitable for popularization and use.

Description

Technical Field

[0001] The utility model relates to a centrifugal fan, in particular to a centrifugal fan which is convenient to disassemble, and belongs to the technical field of centrifugal fans. Background Art

[0002] Centrifugal fans are machines that rely on input mechanical energy to increase gas pressure and discharge gas. They are driven fluid machines. Centrifugal fans are widely used in ventilation, dust removal and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings; ventilation and air intake of boilers and industrial furnaces; cooling and ventilation in air conditioning equipment and household appliances; drying and selection of grains; inflation and propulsion of wind tunnel wind sources and hovercraft, etc.

[0003] Centrifugal fans are based on the principle of converting kinetic energy into potential energy. They use a high-speed rotating impeller to accelerate the gas, then decelerate and change the flow direction, so that the kinetic energy is converted into potential energy (pressure). In a single-stage centrifugal fan, the gas enters the impeller axially, changes to radial direction when passing through the impeller, and then enters the diffuser. In the diffuser, the gas changes its flow direction and the cross-sectional area of ​​the pipe increases, which slows down the airflow. This deceleration effect converts kinetic energy into pressure energy. The pressure increase mainly occurs in the impeller, and secondly in the expansion process. In multi-stage centrifugal fans, a recirculator is used to allow the airflow to enter the next impeller, generating higher pressure;

[0004] The existing centrifugal fan is not convenient to be disassembled quickly during use, so when the internal structure fails, it cannot be disassembled and repaired in time, which wastes manpower and time. There is a problem of inconvenient disassembly. Therefore, the utility model proposes a centrifugal fan that is easy to disassemble. Utility Model Content

[0005] The utility model provides a centrifugal fan which is convenient to disassemble, and is used to solve the problems raised in the background technology.

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

[0007] The utility model provides a centrifugal fan which is easy to disassemble, comprising a fan casing, the middle portion of the fan casing being of a hollow structure design, internal threaded portions being arranged inside both sides of the hollow groove of the fan casing, external fixing rings being arranged on both sides of the fan casing, an internal threaded ring being fixedly installed on an inner wall of one side of the external fixing ring close to the fan casing, the internal threaded ring being threadedly connected to the internal threaded portion, no less than four groups of primary positioning holes being provided on the outer walls on both sides of the fan casing, the primary positioning holes being equidistantly distributed circumferentially, primary fixing holes being provided on the outer wall of the external fixing ring which are matched with the primary positioning holes, the primary positioning holes being aligned with the primary fixing holes in pairs, and an external air permeable baffle being fixedly installed inside the external fixing ring by welding.

[0008] Furthermore, in order to ensure the air permeability of air circulation, the outer air permeable baffle is designed as a circular structure, and a plurality of evenly distributed air holes are opened on the outer air permeable baffle.

[0009] Furthermore, in order to improve the external protection effect of the fan housing, a triangular protective frame is provided on the outer wall of the outer fixing ring away from the fan housing, and positioning columns are fixedly installed at the top triangular parts of the triangular protective frame.

[0010] Furthermore, in order to position and install the triangular guard frame, a secondary fixing hole is provided in each of the positioning columns.

[0011] Furthermore, in order to improve the positioning and matching installation effect, a secondary positioning hole matched with the secondary fixing hole is opened on the outer wall of the fan housing.

[0012] Furthermore, in order to ensure the normal use of the fan housing, an air outlet channel is integrally connected to the outer wall of one side of the fan housing, and an air outlet is fixedly installed at the top of the air outlet channel.

[0013] Compared with the prior art, the utility model provides the following beneficial effects:

[0014] The utility model can effectively block and protect the outer sides of the fan casing by setting the triangular guard, thereby effectively avoiding collision damage of large objects, having a certain impact resistance protection effect, having good safety in use and structural strength, and when disassembly is required, it is only necessary to first remove the bolts in the triangular guard and then remove the outer fixing ring. It has the use characteristic of quick disassembly, greatly improving the maintenance efficiency, saving time and labor costs. The centrifugal fan of the utility model has the technical effects of quick installation and quick disassembly when actually used, and has a simple overall structure, low manufacturing and maintenance costs, and is suitable for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 This is a schematic diagram of the overall disassembly structure of the centrifugal fan of the utility model;

[0017] Figure 2 It is a schematic diagram of the structure of the internal thread portion of the fan housing of the utility model;

[0018] Figure 3This is a schematic diagram of the structure of the outer fixing ring assembly of the utility model;

[0019] Figure 4 It is a schematic diagram of the triangular guard structure of the utility model.

[0020] In the figure: 1. Fan housing; 2. Internal threaded portion; 3. External fixing ring; 4. Internal threaded ring; 5. Primary positioning hole; 6. Primary fixing hole; 7. External air baffle; 8. Air hole; 9. Triangular guard; 10. Positioning column; 11. Secondary positioning hole; 12. Secondary fixing hole; 13. Air outlet channel; 14. Air outlet. DETAILED DESCRIPTION

[0021] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments. They can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementation methods and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0022] According to an embodiment of the utility model, a centrifugal fan that is easy to disassemble is provided.

[0023] The present invention is now further described in conjunction with the accompanying drawings and specific implementation methods. Figure 1-4 As shown, a centrifugal fan that is easy to disassemble according to an embodiment of the utility model includes a fan casing 1, the middle part of the fan casing 1 is a hollow structure design, internal threaded parts 2 are arranged inside both sides of the hollow groove of the fan casing 1, external fixing rings 3 are arranged on both sides of the fan casing 1, an internal thread ring 4 is fixedly installed on the inner wall of the external fixing ring 3 close to one side of the fan casing 1, and the internal thread ring 4 is threadedly connected to the internal threaded part 2, and no less than four groups of primary positioning holes 5 are opened on the outer walls of both sides of the fan casing 1, and the primary positioning holes 5 are equidistantly distributed around the circumference, and primary fixing holes 6 that are compatible with the primary positioning holes 5 are opened on the outer wall of the external fixing ring 3, and the primary positioning holes 5 are aligned with the primary fixing holes 6 in pairs, and an outer air permeable baffle 7 is fixedly installed inside the external fixing ring 3 by welding.

[0024] In one embodiment, the outer air permeable baffle 7 is designed as a circular structure, and a plurality of evenly distributed air permeable holes 8 are formed on the outer air permeable baffle 7 .

[0025] In one embodiment, a triangular guard frame 9 is provided on the outer wall of the outer fixing ring 3 away from the fan housing 1 , and positioning columns 10 are fixedly installed at the top triangular parts of the triangular guard frame 9 .

[0026] In one embodiment, each positioning column 10 is provided with a secondary fixing hole 12 .

[0027] In one embodiment, a secondary positioning hole 11 matched with the secondary fixing hole 12 is opened on the outer wall of the fan housing 1 .

[0028] In one embodiment, an air outlet channel 13 is integrally connected to an outer wall of one side of the fan housing 1 , and an air outlet 14 is fixedly installed at the top of the air outlet channel 13 .

[0029] Working principle: When the centrifugal fan of the utility model needs to be assembled, the internal thread ring 4 of the outer fixing ring 3 can be rotatably installed on the internal thread portion 2 of the fan housing 1, thereby completing the preliminary thread connection work between the outer fixing ring 3 and the fan housing 1;

[0030] When the outer fixing ring 3 is screwed into the inner thread portion 2 of the fan housing 1, the primary positioning hole 5 on the fan housing 1 will be aligned with the primary fixing hole 6 on the outer fixing ring 3. At this time, a bolt for fixing can be installed between the primary positioning 5 and the primary fixing hole 6, thereby completing the fixed connection between the outer fixing ring 3 and the fan housing 1.

[0031] When the outer fixing ring 3 is assembled with the fan housing 1, the three positioning posts 10 of the triangular guard 9 can be manually aligned with the three secondary positioning holes 11 of the fan housing 1. After alignment, fixing bolts can be installed in the secondary positioning holes 11 between the positioning posts 10 and the fan housing 1, thereby completing the overall installation of the triangular guard;

[0032] The utility model can effectively block and protect the outer sides of the fan casing 1 by setting the triangular guard 9, thereby effectively avoiding collision damage of large objects, having a certain impact resistance protection effect, having good safety in use and structural strength, and when disassembly is required, it is only necessary to first remove the bolts in the triangular guard 9, and then remove the outer fixing ring 3. It has the use characteristic of quick disassembly, greatly improving the maintenance efficiency, saving time and labor costs. The centrifugal fan of the utility model has the technical effects of quick installation and quick disassembly when actually used, and has a simple overall structure, low manufacturing and maintenance costs, and is suitable for popularization and use.

[0033] To sum up, with the help of the above-mentioned technical solution of the utility model, the technical problem in the background technology that "the existing centrifugal fan is not convenient to be disassembled quickly during use, which leads to the inability to disassemble and repair it in time when the internal structure fails, wasting manpower and time, and causing inconvenience in disassembly" is solved.

[0034] In the present utility model, unless otherwise clearly specified and limited, the terms "installation", "setting", "connection", "fixation", "screwing" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly limited, ordinary technicians in this field can understand the specific meanings of the above terms in the present utility model according to the specific circumstances. The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. The centrifugal fan is easy to disassemble, characterized in that: The fan housing (1) comprises a fan housing (1), wherein the middle part of the fan housing (1) is designed as a hollow structure, and internal threaded parts (2) are arranged inside both sides of the hollow groove of the fan housing (1), and external fixing rings (3) are arranged on both sides of the fan housing (1), and an internal thread ring (4) is fixedly installed on the inner wall of the external fixing ring (3) close to the side of the fan housing (1), and the internal thread ring (4) is threadedly connected to the internal threaded part (2), and no less than four groups of primary positioning holes (5) are opened on the outer walls of both sides of the fan housing (1), and the primary positioning holes (5) are distributed circumferentially at equal intervals, and primary fixing holes (6) matched with the primary positioning holes (5) are opened on the outer wall of the external fixing ring (3), and the primary positioning holes (5) and the primary fixing holes (6) are aligned with each other, and an external air permeable baffle (7) is fixedly installed inside the external fixing ring (3) by welding.

2. The centrifugal fan that is easy to disassemble according to claim 1 is characterized in that: The outer air permeable baffle (7) is designed as a circular structure, and is provided with a plurality of evenly distributed air permeable holes (8).

3. The conveniently disassembled centrifugal fan according to claim 1, characterized in that: A triangular guard frame (9) is provided on the outer wall of the outer fixing ring (3) away from the fan housing (1), and positioning columns (10) are fixedly installed at the top triangular parts of the triangular guard frame (9).

4. The conveniently disassembled centrifugal fan according to claim 3 is characterized in that: Each positioning column (10) is provided with a secondary fixing hole (12).

5. The conveniently disassembled centrifugal fan according to claim 1, characterized in that: A secondary positioning hole (11) matching the secondary fixing hole (12) is provided on the outer wall of the fan housing (1).

6. The conveniently disassembled centrifugal fan according to claim 1, characterized in that: An air outlet channel (13) is integrally connected to an outer wall of one side of the fan housing (1), and an air outlet (14) is fixedly mounted at the top of the air outlet channel (13).

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