Volute structure of centrifugal fan

Abstract

The utility model discloses a centrifugal fan volute structure which comprises a volute, an air inlet is formed in the side face of the volute, the volute is communicated with a first air outlet pipe, and the first air outlet pipe is communicated with a second air outlet pipe through a rotating pipe. The rotating pipe is arranged on the first air outlet pipe and the second air outlet pipe, so that the rotating pipe can rotate on the first air outlet pipe and the second air outlet pipe, the rotating pipe is communicated with a third air outlet pipe, and a cover plate is detachably arranged at a port of the second air outlet pipe and a port of the third air outlet pipe; the volute solves the problems that an air outlet pipe of a volute in the prior art is generally of an integrally-formed structure with the volute, the direction of the air outlet pipe is not easy to change, adjustment cannot be conducted according to specific application scenes, and installation and arrangement of a conveying air pipe on the air outlet pipe are not facilitated.

Description

Technical Field

[0001] This utility model relates to centrifugal fans, specifically to a centrifugal fan volute structure. Background Technology

[0002] The volute is a crucial component of a centrifugal fan, with an air inlet and an air outlet formed on it. For example, Chinese patent CN202122075327.3 provides a fan volute including an air outlet and a rear side plate. A rear air inlet is formed in the rear side plate, and the rear air inlet is eccentrically positioned on the side furthest from the air outlet, forming a single-sided distribution. The rear side plate is closed on the side closest to the air outlet. This invention distributes the rear air inlet only on the side furthest from the air outlet, while omitting the closed rear air inlet on the side closest to the air outlet, creating an eccentric design for the rear air inlet distribution. This avoids fan pressure loss due to the air outlet and effectively increases fan pressure when using the same power fan motor. In existing volutes like the one described above, the air outlet is generally integrally formed with the volute, making it difficult to change the direction of the air outlet and adjust it according to specific application scenarios, which is detrimental to the installation and arrangement of the conveying air duct on the air outlet. Utility Model Content

[0003] The purpose of this utility model is to provide a centrifugal fan volute structure that solves the problem that in the prior art, the air outlet pipe is generally integrally formed with the volute, which makes it difficult to change the direction of the air outlet pipe, cannot be adjusted according to specific application scenarios, and is not conducive to the installation and arrangement of the conveying air pipe on the air outlet pipe.

[0004] To achieve the above objectives, this utility model provides a centrifugal fan volute structure, which includes a volute, an air inlet formed on the side of the volute, a first air outlet pipe connected to the volute, the first air outlet pipe being connected to a second air outlet pipe via a rotating pipe, such that the rotating pipe can rotate on the first and second air outlet pipes, a third air outlet pipe connected to the rotating pipe, and detachably provided cover plates at the ports of the second and third air outlet pipes.

[0005] Preferably, the surfaces of the first air outlet pipe and the second air outlet pipe are formed with annular protrusions, and the inner wall of the rotating pipe is formed with annular grooves that cooperate with the annular protrusions.

[0006] Preferably, a sealing ring is wrapped around the annular protrusion structure.

[0007] Preferably, a ring is coaxially arranged on the rotating tube, and a plurality of slots are spaced apart on the ring;

[0008] A hinge seat is fixed to the surface of the first air outlet duct, and a locking pin is provided on the hinge seat so that the locking pin can be engaged in the slot.

[0009] Preferably, the locking pin is a screw rod, and locking nuts are screwed onto the screw rod at intervals.

[0010] Preferably, a mounting base is connected to the lower end of the volute.

[0011] Beneficial Effects: This utility model provides a centrifugal fan volute structure, which includes a volute with an air inlet on its side. A first air outlet pipe is connected to the volute, and the first air outlet pipe is connected to a second air outlet pipe via a rotating pipe, allowing the rotating pipe to rotate on both the first and second air outlet pipes. A third air outlet pipe is connected to the rotating pipe, and the ends of the second and third air outlet pipes are detachably equipped with cover plates. During installation, the cover plate at the end of the second air outlet pipe can be removed, and an air supply pipe can be installed. Alternatively, the angle of the rotating pipe can be adjusted as needed to remove the cover plate on the third air outlet pipe and install an air supply pipe. The volute structure provided by this utility model facilitates the installation of air supply pipes on the air outlet pipes, improving its applicability, depending on the specific application scenario.

[0012] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the following detailed description to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0014] Figure 1 This is a structural diagram of the centrifugal fan volute structure provided by this utility model;

[0015] Figure 2 yes Figure 1 Enlarged view of section A.

[0016] Explanation of reference numerals in the attached figures

[0017] 1-Volume; 2-Air inlet; 3-Mounting base; 4-First air outlet pipe; 5-Second air outlet pipe; 6-Rotating pipe; 7-Third air outlet pipe; 8-Cover plate; 9-Ring; 10-Slot; 11-Hinge base; 12-Locking pin; 13-Locking nut. Detailed Implementation

[0018] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0019] like Figure 1 and 2 As shown: This utility model provides a centrifugal fan volute structure, which includes a volute 1. An air inlet 2 is formed on the side of the volute 1. A first air outlet duct 4 is connected to the volute 1. The first air outlet duct 4 is connected to a second air outlet duct 5 via a rotating tube 6, allowing the rotating tube 6 to rotate on both the first and second air outlet ducts 4 and 5. A third air outlet duct 7 is connected to the rotating tube 6. Cover plates 8 are detachably provided at the ends of the second and third air outlet ducts. During installation, the cover plate at the end of the second air outlet duct can be removed, and an air supply duct can be installed. Alternatively, the angle of the rotating tube can be adjusted as needed to remove the cover plate on the third air outlet duct and install an air supply duct. The volute structure provided by this utility model facilitates the installation of air supply ducts on the air outlet ducts, improving its applicability, depending on the specific application scenario.

[0020] In a preferred embodiment of this utility model, in order to enable the rotating tube to rotate effectively on the surfaces of the first air outlet pipe and the second air outlet pipe and prevent it from falling off, the surfaces of the first air outlet pipe 4 and the second air outlet pipe 5 are formed with annular protrusions, and the inner wall of the rotating tube 6 is formed with annular grooves that cooperate with the annular protrusions.

[0021] In a preferred embodiment of this utility model, in order to improve the sealing performance between the rotating pipe and the first and second air outlet pipes, a sealing rubber ring is wrapped around the annular protrusion structure.

[0022] In a preferred embodiment of this utility model, in order to fix and limit the rotating tube and prevent it from rotating during normal operation, a ring 9 is coaxially provided on the rotating tube 6, and a plurality of slots 10 are provided on the ring 9 at intervals.

[0023] The first air outlet duct 4 has a hinge seat 11 fixed on its surface, and a locking pin 12 is provided on the hinge seat 11 so that the locking pin 12 can be engaged in the slot 10.

[0024] In a preferred embodiment of this utility model, in order to press the locking pin into the slot, the locking pin 12 is a screw, and locking nuts 13 are screwed onto the screw at intervals.

[0025] In a preferred embodiment of this utility model, in order to facilitate the installation of the volute, the lower end of the volute 1 is connected to a mounting base 3.

[0026] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0027] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

[0028] Furthermore, various different embodiments of this utility model can be combined in any way, as long as they do not violate the spirit of this utility model, they should also be regarded as the content disclosed by this utility model.

Claims

1. A centrifugal fan volute structure, characterized in that, The centrifugal fan casing structure includes a casing (1), an air inlet (2) is formed on the side of the casing (1), a first air outlet pipe (4) is connected to the casing (1), the first air outlet pipe (4) is connected to a second air outlet pipe (5) through a rotating pipe (6), so that the rotating pipe (6) can rotate on the first air outlet pipe (4) and the second air outlet pipe (5), a third air outlet pipe (7) is connected to the rotating pipe (6), and the ports of the second air outlet pipe (5) and the third air outlet pipe (7) are detachably provided with cover plates (8).

2. The centrifugal fan volute structure according to claim 1, characterized in that, The surfaces of the first air outlet pipe (4) and the second air outlet pipe (5) are formed with annular protrusions, and the inner wall of the rotating pipe (6) is formed with annular grooves that cooperate with the annular protrusions.

3. The centrifugal fan volute structure according to claim 2, characterized in that, The annular protrusion structure is wrapped with a sealing ring.

4. The centrifugal fan volute structure according to claim 3, characterized in that, A ring (9) is coaxially arranged on the rotating tube (6), and a plurality of slots (10) are spaced apart on the ring (9); The first air outlet pipe (4) has a hinge seat (11) fixed on its surface. The hinge seat (11) is provided with a locking pin (12) so that the locking pin (12) can be engaged in the slot (10).

5. The centrifugal fan volute structure according to claim 4, characterized in that, The locking pin (12) is a screw rod, and locking nuts (13) are screwed onto the screw rod at intervals.

6. The centrifugal fan volute structure according to claim 5, characterized in that, The lower end of the volute (1) is connected to a mounting base (3).

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