Industrial centrifugal fan air inlet with protection structure

Abstract

The utility model provides an industrial centrifugal fan air inlet with a protection structure, which comprises an air inlet body, and the air inlet side of the air inlet body is connected with a protection net; a plurality of buckles distributed at intervals in the circumferential direction are fixed to the end of the air inlet side of the air inlet body, a clamping groove is formed in the outer end of each buckle, and limiting switches corresponding to the multiple buckles one to one are fixed to the inner wall of the air inlet side of the air inlet body. The trigger end of each limiting switch movably penetrates through the air inlet body and the buckling pieces and then extends into the clamping groove in the corresponding position, clamping strips corresponding to the buckling pieces one to one are fixed to the outer edge of the protective net, and each clamping strip is clamped into the clamping groove in the corresponding position and used for triggering the trigger end of the limiting switch in the corresponding position. All the limit switches are connected in series in a power line of the industrial centrifugal fan; after the internal protective net is detached, the industrial centrifugal fan connected with the air inlet of the industrial centrifugal fan can be prevented from being accidentally started.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial centrifugal fan accessories, in particular to an industrial centrifugal fan air inlet with a protective structure. Background Art

[0002] The air inlet of an industrial centrifugal fan is a component used to be fixed on the air inlet end of the industrial centrifugal fan. The air inlet of an industrial centrifugal fan currently on the market includes an air inlet body, the air inlet side of the air inlet body is connected to a protective net, and the air outlet side of the air inlet body is used to be fixed to the air inlet end of the industrial centrifugal fan. When the industrial centrifugal fan is working, the air in the environment will enter the interior of the industrial centrifugal fan through the air inlet body, and after the industrial centrifugal fan is used for a long time, a lot of dust will adhere to the protective net located on the air inlet side of the air inlet body, so the protective net needs to be disassembled and cleaned regularly. However, in the air inlet structure of industrial centrifugal fans currently on the market, when the protective net is disassembled, such as when the industrial centrifugal fan is accidentally started, and when the operator's hand is inserted into the air inlet body through the air inlet side of the air inlet body, the rotating blades in the industrial centrifugal fan will injure the operator's hand, that is, there is a great safety hazard. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an industrial centrifugal fan air inlet with a protective structure. After the internal protective net is removed, the industrial centrifugal fan connected to the industrial centrifugal fan air inlet can be prevented from being accidentally started, thereby preventing the blades in the industrial centrifugal fan from accidentally rotating and causing injuries to people, thereby eliminating safety hazards.

[0004] The utility model provides an industrial centrifugal fan air inlet with a protective structure, comprising an air inlet body, an air inlet side of the air inlet body connected with a protective net, and an air outlet side of the air inlet body used for being fixed to the air inlet end of the industrial centrifugal fan; a plurality of clips distributed at circumferential intervals are fixed to the end of the air inlet side of the air inlet body, a clip groove is provided on the outer end of each clip, and limit switches corresponding to the plurality of clips are fixed to the inner wall of the air inlet side of the air inlet body, and a trigger end of each limit switch movably penetrates the air inlet body and the clips and then extends into the clip groove at a corresponding position, and a clip strip corresponding to the plurality of clips is fixed at the outer edge of the protective net, and each clip strip is clipped into the clip groove at a corresponding position and used for triggering the trigger end of the limit switch at the corresponding position, and all the limit switches are connected in series in the power cord of the industrial centrifugal fan.

[0005] By adopting the above structure, when the protective net is disassembled, the triggering ends of all limit switches can be released from the triggered state, that is, each card strip located on the protective net will release the triggering state of the triggering end of the limit switch at the corresponding position, and because all limit switches are connected in series in the power cord of the industrial centrifugal fan, the power supply of the industrial centrifugal fan can be automatically disconnected after the protective net is disassembled, that is, the industrial centrifugal fan connected to the air inlet of the industrial centrifugal fan can be prevented from being accidentally started, and further, the blades in the industrial centrifugal fan can be prevented from accidentally rotating to cause injuries, thereby eliminating safety hazards.

[0006] In a possible embodiment, each fastener is provided with a boss on both sides, each fastener is fixed to the air inlet body by a first screw passing through the boss, and each first screw is threadedly connected to the air inlet body; by adopting this structure, each fastener can be reliably fixed to the air inlet body by the first screw passing through the boss and threadedly connected to the air inlet body.

[0007] In a possible embodiment, each limit switch is fixed to the air inlet body by a plurality of second screws distributed at circumferential intervals, and each second screw is threadedly connected to the air inlet body; by adopting this structure, each limit switch can be reliably fixed to the air inlet body by a plurality of second screws distributed at circumferential intervals.

[0008] In a possible embodiment, an annular flange is provided on the outer edge of the air outlet side of the air inlet body, and a plurality of connecting holes distributed at circumferential intervals are provided on the annular flange. The air inlet body is fixed to the air inlet end of the industrial centrifugal fan by bolts passing through the connecting holes, and each bolt is threadedly connected to the air inlet end of the industrial centrifugal fan. By adopting this structure, the air outlet side of the air inlet body can be reliably fixed to the air inlet end of the industrial centrifugal fan by bolts passing through the connecting holes and threadedly connected to the air inlet end of the industrial centrifugal fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a left-side structural schematic diagram of the utility model;

[0010] Figure 2 for Figure 1 The schematic diagram of the structure after the enlargement of A in the middle;

[0011] Figure 3 It is a cross-sectional structural schematic diagram of the utility model;

[0012] Figure 4 for Figure 3 Schematic diagram of the enlarged structure at point B in the middle. DETAILED DESCRIPTION

[0013] First, those skilled in the art should understand that these implementations are only used to explain the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0014] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0015] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0016] The present application is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] See also Figure 1-4 As shown, the embodiment of the present application discloses an air inlet of an industrial centrifugal fan with a protective structure, comprising an air inlet body 1, an air inlet side of the air inlet body 1 being connected to a protective net 2, and an air outlet side of the air inlet body 1 being used to be fixed to the air inlet end of the industrial centrifugal fan; a plurality of circumferentially spaced fasteners 3 are fixed to the end of the air inlet side of the air inlet body 1, a slot 31 is provided on the outer end of each fastener 3, and a limit switch 4 corresponding to the plurality of fasteners 3 is fixed to the inner wall of the air inlet side of the air inlet body 1, and a trigger end 41 of each limit switch 4 is movable through the air inlet body 1 and the fastener 3 and then extends into the slot 31 at the corresponding position, and a clamping strip 21 corresponding to the plurality of fasteners 3 is fixed at the outer edge of the protective net 2, and each clamping strip 21 is clamped into the slot 31 at the corresponding position and is used to trigger the triggering end 41 of the limit switch 4 at the corresponding position, and all limit switches 4 are connected in series in the power cord of the industrial centrifugal fan.

[0018] Bosses 32 are provided on both sides of each fastener 3, and each fastener 3 is fixed to the air inlet body 1 by a first screw 5 passing through the boss 32, and each first screw 5 is threadedly connected to the air inlet body 1; by adopting this structure, each fastener can be reliably fixed to the air inlet body by the first screw passing through the boss and threadedly connected to the air inlet body.

[0019] Each limit switch 4 is fixed to the air inlet body 1 by a plurality of second screws 6 distributed at circumferential intervals, and each second screw 6 is threadedly connected to the air inlet body 1; by adopting this structure, each limit switch can be reliably fixed to the air inlet body by a plurality of second screws distributed at circumferential intervals.

[0020] An annular flange 11 is provided on the outer edge of the air outlet side of the air inlet body 1, and a plurality of connecting holes 12 distributed at circumferential intervals are provided on the annular flange 11. The air inlet body 1 is fixed to the air inlet end of the industrial centrifugal fan by bolts passing through the connecting holes 12, and each bolt is threadedly connected to the air inlet end of the industrial centrifugal fan. By adopting this structure, the air outlet side of the air inlet body can be reliably fixed to the air inlet end of the industrial centrifugal fan by bolts passing through the connecting holes and threadedly connected to the air inlet end of the industrial centrifugal fan.

[0021] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. An industrial centrifugal fan air inlet with a protective structure, comprising an air inlet body (1), the air inlet side of the air inlet body (1) being connected to a protective net (2), and the air outlet side of the air inlet body (1) being used for fixing to the air inlet end of the industrial centrifugal fan; characterized in that: A plurality of circumferentially spaced clips (3) are fixed to the end of the air inlet side of the air inlet body (1), and a slot (31) is provided on the outer end of each of the clips (3). Limit switches (4) corresponding to the plurality of clips (3) are fixed to the inner wall of the air inlet side of the air inlet body (1), and a trigger end (41) of each of the limit switches (4) movably penetrates the air inlet body (1) and the clips (3) and then extends into the slot (31) at a corresponding position. A clip strip (21) corresponding to the plurality of clips (3) is fixed to the outer edge of the protective net (2), and each of the clip strips (21) is inserted into the slot (31) at a corresponding position and is used to trigger the trigger end (41) of the limit switch (4) at the corresponding position. All of the limit switches (4) are connected in series to the power cord of the industrial centrifugal fan.

2. The industrial fan air inlet with a protective structure according to claim 1, characterized in that: Bosses (32) are provided on both sides of each of the snap-fitting parts (3); each of the snap-fitting parts (3) is fixed to the air inlet body (1) via a first screw (5) inserted through the bosses (32); and each of the first screws (5) is threadedly connected to the air inlet body (1).

3. The industrial fan air inlet with a protective structure according to claim 1 or 2, characterized in that: Each of the limit switches (4) is fixed to the air inlet body (1) via a plurality of second screws (6) distributed at circumferential intervals, and each of the second screws (6) is threadedly connected to the air inlet body (1).

4. The industrial fan air inlet with a protective structure according to claim 3 is characterized in that: An annular flange (11) is provided on the outer edge of the air outlet side of the air inlet body (1), and a plurality of connection holes (12) are provided on the annular flange (11) and are distributed at circumferential intervals. The air inlet body (1) is fixed to the air inlet end of the industrial centrifugal fan by bolts passing through the connection holes (12), and each of the bolts is threadedly connected to the air inlet end of the industrial centrifugal fan.

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