Wear-resistant centrifugal fan

Abstract

The utility model provides an anti-abrasion centrifugal fan which comprises a volute and an exhaust port formed in the upper end of the volute. The auxiliary device is arranged between the volute and the exhaust port, is used for shielding the exhaust port when the centrifugal fan is not used so as to prevent sundries from entering the volute through the exhaust port, and does not shield the exhaust port before the centrifugal fan is used so as to exhaust airflow; the auxiliary device comprises an auxiliary cover which is rotatably arranged on the exhaust port and used for rotating to shield the exhaust port when the centrifugal fan is not used so as to prevent sundries from entering the volute through the exhaust port and rotating to be perpendicular to the exhaust port before the centrifugal fan is used so that airflow can be conveniently exhausted. When the centrifugal fan is not used, the exhaust port can be shielded, so that sundries can be prevented from entering the volute through the exhaust port, the exhaust port can not be shielded before the centrifugal fan is used, airflow can be discharged conveniently, and use of the centrifugal fan is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal fans, in particular to a wear-resistant centrifugal fan. Background Art

[0002] A centrifugal fan is a supporting device that utilizes input mechanical energy to increase gas pressure and discharge gas. Centrifugal fans are used for ventilation, dust removal and cooling. With the continuous development of science and technology, people have higher and higher requirements for the manufacturing process of centrifugal fans.

[0003] A wear-resistant centrifugal fan disclosed in Chinese patent application number CN202222082153.8 comprises a base, one side of the upper end surface of the base is fixedly connected with a volute, the other side of the upper end surface of the base is fixedly connected with a mounting frame, a motor is fixedly arranged on the upper end of the mounting frame, a rotating shaft is rotatably arranged inside the volute through a bearing seat, one end of the rotating shaft is fixedly connected with an impeller, and blades are fixedly arranged on one side of the impeller; an air intake port is fixedly arranged on one side of the volute, a connecting pipe port is fixedly connected to the outer side of the air intake port, an air inlet pipe is arranged at one end close to the connecting pipe port, two connecting half-sleeves are sleeved between the connecting pipe port and the air inlet pipe, convex cavities are fixedly arranged on the two connecting half-sleeves, and filters are arranged inside the two convex cavities; the volute comprises a metal shell and a sound-absorbing layer, and the sound-absorbing layer is fixedly coated on the inner surface of the metal shell.

[0004] Although the above patents can solve the corresponding technical problems, there are still certain defects in the use process:

[0005] When the centrifugal fan is not in use, the exhaust port cannot be shielded, thereby failing to prevent debris from entering the interior of the volute through the exhaust port, which is not conducive to the use of the centrifugal fan. Utility Model Content

[0006] The utility model aims to provide a wear-resistant centrifugal fan in view of the defects and shortcomings of the prior art.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] An anti-wear centrifugal fan comprises a volute, an exhaust port arranged at the upper end of the volute, and an auxiliary device arranged between the volute and the exhaust port for shielding the exhaust port when the centrifugal fan is not in use to prevent debris from entering the volute through the exhaust port and for not shielding the exhaust port before the centrifugal fan is used to facilitate airflow discharge;

[0009] The auxiliary device includes an auxiliary cover rotatably arranged on the exhaust port, which is used to rotate to cover the exhaust port when the centrifugal fan is not in use to prevent debris from entering the volute through the exhaust port and to rotate to a vertical position with the exhaust port before using the centrifugal fan to facilitate airflow discharge, and a driving member arranged on the volute and connected to the auxiliary cover for driving the auxiliary cover to move.

[0010] A further improvement is that the driving member includes an extension seat arranged on the volute at one side of the exhaust port and extending upward to a predetermined position, a low-speed motor arranged on the extension seat, two limit plates arranged on the rotating shaft of the low-speed motor and arranged along the length direction of the rotating shaft of the low-speed motor, a driving rope with one end arranged on the auxiliary cover and the other end arranged on the rotating shaft of the low-speed motor, located between the two limit plates, a stop limit seat arranged on the extension seat and between the low-speed motor and the exhaust port for abutting the auxiliary cover to limit the auxiliary cover when the auxiliary cover is rotated to a vertical state with respect to the exhaust port, and a movable slot opened through the stop limit seat for the driving rope to pass through and move on the stop limit seat.

[0011] A further improvement is that the end face of the auxiliary cover close to the exhaust port is provided with a first auxiliary pad for preventing the auxiliary cover from directly hitting the exhaust port when the driving member drives the auxiliary cover to cover the exhaust port and improving the sealing between the auxiliary cover and the exhaust port.

[0012] A further improvement is that: the end surface of the abutting and limiting seat close to the auxiliary cover is provided with a second auxiliary pad for preventing the auxiliary cover from directly hitting the abutting and limiting seat when the abutting and limiting seat abuts against the auxiliary cover.

[0013] A further improvement is that the auxiliary cover is connected to the exhaust port via at least one hinge.

[0014] A further improvement is that the auxiliary cover is connected to one end of the driving rope via a connecting seat, and the connecting seat is arranged at a predetermined position on the auxiliary cover so that when the auxiliary cover is rotated to be vertical to the exhaust port, the connecting seat is located below the top limit seat and the top of the auxiliary cover.

[0015] After adopting the above technical scheme, the beneficial effects of the utility model are as follows: the exhaust port can be shielded when the centrifugal fan is not in use, thereby preventing debris from entering the volute through the exhaust port, and the exhaust port no longer needs to be shielded before the centrifugal fan is used to facilitate airflow discharge, which is beneficial to the use of the centrifugal fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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 or the description of the prior art 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 labor.

[0017] Figure 1 This is a schematic diagram of the structure of the utility model when the auxiliary cover is rotated to cover the exhaust port;

[0018] Figure 2 It corresponds to Figure 1 A magnified view of part A;

[0019] Figure 3 It is a schematic diagram of the structure of the utility model when the auxiliary cover is rotated to be perpendicular to the exhaust port;

[0020] Figure 4 It corresponds to Figure 3 A magnified view of part B;

[0021] Figure 5 It is a structural schematic diagram of the medium and low speed motor and the limit plate of the utility model;

[0022] Figure 6 It is a structural schematic diagram of a top stopper, a movable slot and a second auxiliary pad in the utility model.

[0023] Explanation of the reference numerals: volute 1, exhaust port 2, auxiliary cover 3, extension seat 4, low-speed motor 5, limit plate 6, drive rope 7, top limit seat 8, movable slot 9, first auxiliary pad 10, second auxiliary pad 11, hinge 12, connecting seat 13. DETAILED DESCRIPTION

[0024] The utility model is now further described in conjunction with the accompanying drawings and specific embodiments.

[0025] See also Figures 1 to 6 As shown, the technical solution adopted in this specific implementation is:

[0026] A wear-resistant centrifugal fan comprises a volute 1, an exhaust port 2 arranged at the upper end of the volute 1, and an auxiliary device arranged between the volute 1 and the exhaust port 2 for shielding the exhaust port 2 when the centrifugal fan is not in use to prevent debris from entering the interior of the volute 1 through the exhaust port 2 and for not shielding the exhaust port 2 before the centrifugal fan is used to facilitate airflow discharge; the auxiliary device comprises an auxiliary cover 3 rotatably arranged on the exhaust port 2 for rotating to shield the exhaust port 2 when the centrifugal fan is not in use to prevent debris from entering the interior of the volute 1 through the exhaust port 2 and for rotating to a vertical state with the exhaust port 2 before the centrifugal fan is used to facilitate airflow discharge, and a driving member arranged on the volute 1 and connected to the auxiliary cover 3 for driving the auxiliary cover 3 to move, and a driving member for driving the auxiliary cover 3 to move. The moving parts include an extension seat 4 arranged on the volute 1 at one side of the exhaust port 2 and extending upward to a predetermined position, a low-speed motor 5 arranged on the extension seat 4, two limit plates 6 arranged on the rotating shaft of the low-speed motor 5 and arranged along the length direction of the rotating shaft of the low-speed motor 5, a driving rope 7 with one end arranged on the auxiliary cover 3 and the other end arranged on the rotating shaft of the low-speed motor 5 and located between the two limit plates 6, a stop-stop seat 8 arranged on the extension seat 4 and between the low-speed motor 5 and the exhaust port 2 for stopping the auxiliary cover 3 when the auxiliary cover 3 is rotated to a vertical state with respect to the exhaust port 2 to limit the auxiliary cover 3, and a movable slot 9 opened through the stop-stop seat 8 for the driving rope 7 to pass through and move on the stop-stop seat 8.

[0027] The end surface of the auxiliary cover 3 close to the exhaust port 2 is provided with a first auxiliary pad 10 for preventing the auxiliary cover 3 from directly hitting the exhaust port 2 when the driving member drives the auxiliary cover 3 to cover the exhaust port 2 and improving the sealing between the auxiliary cover 3 after covering the exhaust port 2; the end surface of the stop limit seat 9 close to the auxiliary cover 3 is provided with a second auxiliary pad 11 for preventing the auxiliary cover 3 from directly hitting the stop limit seat 8 when the stop limit seat 8 hits the auxiliary cover 3.

[0028] The auxiliary cover 3 is connected to the exhaust port 2 by at least one hinge 12, and the auxiliary cover 3 is connected to one end of the driving rope 7 by a connecting seat 13. The connecting seat 13 is arranged at a predetermined position on the auxiliary cover 3 so that when the auxiliary cover 3 is rotated to a vertical state with the exhaust port 2, the connecting seat 13 is located below the top stop seat 8 and the auxiliary cover 3.

[0029] The low-speed motor has the characteristics of low noise and maintenance-free. The speed range is 0.83r / min-300r / min. The top limit seat is in the shape of 7. The first auxiliary pad and the second auxiliary pad are both EPDM rubber auxiliary pads.

[0030] The working principle of the utility model is as follows: when the centrifugal fan is not in use, the low-speed motor 5 is driven to rotate, the rotating shaft of the low-speed motor 5 unwinds the driving rope 7, the auxiliary cover 3 is rotated to cover the exhaust port 2 to prevent debris from entering the volute 1 through the exhaust port 2; before the centrifugal fan is used, the low-speed motor 5 is driven to rotate, the rotating shaft of the low-speed motor 5 rewinds the driving rope 7, the auxiliary cover 3 is rotated to be perpendicular to the exhaust port 2 to facilitate airflow discharge, and when the auxiliary cover 3 is rotated to be perpendicular to the exhaust port 2, the limit seat 8 is pressed against the auxiliary cover 3. The cover 3 is used to limit the auxiliary cover 3, the movable slot 9 is used to drive the rope 7 to pass through and move on the top limit seat 8, the two limit plates 6 play a limiting role when driving the rotating shaft of the low-speed motor 5 to unwind or reel the drive rope 7, the first auxiliary pad 10 prevents the auxiliary cover 3 from directly hitting the exhaust port 2 when the driving part drives the auxiliary cover 3 to cover the exhaust port 2 and improves the sealing between the auxiliary cover 3 after covering the exhaust port 2, the second auxiliary pad 11 prevents the auxiliary cover 3 from directly hitting the top limit seat 8 when the top limit seat 8 hits the auxiliary cover 3.

[0031] The contents not described in detail in the utility model specification belong to the prior art known to those skilled in the art. The utility model is to protect the structure of the product, and the model of each component is not the content of the utility model protection, which is also the prior art known to those skilled in the art. Any component on the market that can achieve the above functions of the utility model can be selected and applied.

[0032] The basic principles, main features and advantages of the utility model are shown and described above. Those skilled in the art should understand that the utility model is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which shall fall within the scope of the utility model to be protected. The scope of protection of the utility model shall be defined by the attached claims and their equivalents.

Claims

1. A wear-resistant centrifugal fan, comprising a volute and an exhaust port disposed at the upper end of the volute, characterized in that: It also includes an auxiliary device disposed between the volute and the exhaust port for shielding the exhaust port when the centrifugal fan is not in use to prevent debris from entering the interior of the volute through the exhaust port and for not shielding the exhaust port before the centrifugal fan is used to facilitate airflow discharge; The auxiliary device includes an auxiliary cover rotatably arranged on the exhaust port, which is used to rotate to cover the exhaust port when the centrifugal fan is not in use to prevent debris from entering the volute through the exhaust port, and rotate to a vertical state with the exhaust port before the centrifugal fan is used to facilitate airflow discharge, and a driving member arranged on the volute and connected to the auxiliary cover for driving the auxiliary cover to move; The driving member includes an extension seat arranged on the volute at one side of the exhaust port and extending upward to a predetermined position, a low-speed motor arranged on the extension seat, two limit plates arranged on the rotating shaft of the low-speed motor and arranged along the length direction of the rotating shaft of the low-speed motor, a driving rope with one end arranged on the auxiliary cover and the other end arranged on the rotating shaft of the low-speed motor and located between the two limit plates, a stop-stop seat arranged on the extension seat and between the low-speed motor and the exhaust port for stopping the auxiliary cover when the auxiliary cover is rotated to a state perpendicular to the exhaust port to limit the auxiliary cover, and a movable slot opened through the stop-stop seat for the driving rope to pass through and move on the stop-stop seat.

2. The wear-resistant centrifugal fan according to claim 1, characterized in that: The end surface of the auxiliary cover close to the exhaust port is provided with a first auxiliary pad for preventing the auxiliary cover from directly hitting the exhaust port when the driving member drives the auxiliary cover to cover the exhaust port and improving the sealing between the auxiliary cover and the exhaust port.

3. The wear-resistant centrifugal fan according to claim 1, characterized in that: The end surface of the abutting and limiting seat close to the auxiliary cover is provided with a second auxiliary pad for preventing the auxiliary cover from directly hitting the abutting and limiting seat when the abutting and limiting seat abuts against the auxiliary cover.

4. The wear-resistant centrifugal fan according to claim 1, characterized in that: The auxiliary cover is connected to the exhaust port via at least one hinge.

5. The wear-resistant centrifugal fan according to claim 1, characterized in that: The auxiliary cover is connected to one end of the driving rope through a connecting seat, and the connecting seat is arranged at a predetermined position on the auxiliary cover so that when the auxiliary cover is rotated to be vertical to the exhaust port, the connecting seat is located below the top limit seat and the top of the auxiliary cover.

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