CN218717744U

CN218717744U - Explosion-proof direct connection centrifugal fan box

Info

Publication number: CN218717744U
Application number: CN202222660727.5U
Authority: CN
Inventors: 石兴祥; 沈炳校; 罗灿龙; 戴丹超; 夏淇淇; 赵锋锋
Original assignee: Zhejiang Juying Fan Industry Co ltd
Current assignee: Zhejiang Juying Fan Industry Co ltd
Priority date: 2022-10-10
Filing date: 2022-10-10
Publication date: 2023-03-24
Anticipated expiration: 2032-10-10

Abstract

The utility model discloses an explosion-proof centrifugal fan case that directly allies oneself with, the power distribution box comprises a box body, the collector, the impeller and with the motor of impeller connection, box both sides opening and inside cavity, an opening is the air intake, another opening is the air outlet, the box opening part all is provided with the protection network, box opening part both sides are provided with the change device, the protection network setting is in the protection network, it includes holding chamber, spring and compact heap to change the device, spring and compact heap are connected and all are located the holding chamber, spring one end is fixed on the inner wall in holding chamber, the other end is together fixed with the compact heap. The utility model discloses be provided with the change device, when the protection net goes up to accumulate too much dust or protection network and appear damaging need clean or change, the accessible is changed the device and is dismantled the protection network fast, can realize carrying out quick assembly disassembly's purpose to the protection network through changing the device to convenient regularly clean the protection network, change or clean box inside.

Description

Explosion-proof direct connection centrifugal fan box

Technical Field

The utility model relates to a centrifugal fan field especially relates to an explosion-proof centrifugal fan case that directly allies oneself with.

Background

The centrifugal fan is a driven fluid machine which increases the pressure of gas and discharges the gas by means of input mechanical energy. Centrifugal fans are widely used in ventilation, dust extraction and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings.

The impeller can generate sparks when in contact collision with large granular objects during working, the generated sparks can ignite flammable and explosive gas to cause explosion, the large granular objects are filtered by a protective net in the prior art so as to prevent the large granular objects from entering the inside of the fan to cause explosion, but the protective net is directly fixed on an air inlet and an air outlet through screws or welding at present, and if the protective net needs to be cleaned or damaged, the protective net is not convenient to disassemble; and the impeller may rub against the current collector or the box body during operation, and sparks are generated during the friction, and the generated sparks can also explode inflammable and explosive gases. Based on this, it is imperative to develop an explosion-proof direct-connection centrifugal fan box machine.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an explosion-proof centrifugal fan case that directly allies oneself with can dismantle the protection network fast through the change device that sets up to wash the change, and be equipped with explosion-proof ring on the impeller, can effectually prevent the spark that the impeller produced when pivoted in-process and collector or box friction, possess good explosion-proof function.

To achieve the above object, the utility model provides a:

the utility model provides an explosion-proof centrifugal fan case that directly allies oneself with, includes box, collector, impeller and is connected the motor with direct impeller, box both sides opening and inside cavity, an opening be the air intake, and another opening is the air outlet, the box opening part all is provided with the protection network, box opening part both sides are provided with the change device, the protection network sets up in the protection network, it includes holding chamber, spring and compact heap to change the device, spring and compact heap are connected and all are located the holding chamber, spring one end is fixed on the inner wall in holding chamber, and the other end is together fixed with the compact heap.

Preferably, a pressing groove is formed in one end of the pressing block, the pressing groove faces the protective net, a rotating rod is movably connected to the pressing block, and limiting blocks matched with the rotating rod are arranged on two sides of the accommodating cavity.

Preferably, at least one noise reduction layer is arranged on the inner surface of the box body, and the thickness of the noise reduction layer is 1-3cm.

Preferably, the noise reduction layer is made of soundproof cotton.

Preferably, at least one layer of explosion-proof layer is arranged in the box body, and the thickness of the explosion-proof layer is 3-5mm.

Preferably, the noise reduction layer is positioned between the box body and the explosion-proof layer.

Preferably, the box body and the explosion-proof layer are both made of steel plates.

Preferably, the impeller comprises a front disc, a plurality of blades and a hub, wherein one side of each blade is fixedly connected with the front disc, and one side of each blade is fixedly connected with the hub.

Preferably, an explosion-proof ring is arranged on the outer surface of the front disc, the shape of the explosion-proof ring is consistent with that of the front disc, and an inward convex ring is arranged at one end of the explosion-proof ring.

Preferably, the explosion-proof ring is a copper ring and is fixed on the outer surface of the front disc through bolts.

Preferably, the inside motor pedestal that still is provided with of box, the motor passes through welding or bolt fixed connection on the motor pedestal, the box outside still is provided with the collet, the protection network sets up on the collet.

Preferably, the outer parts of the two sides of the box body are provided with an air inlet flange and an air outlet flange, the air inlet flange is fixedly arranged on an air inlet of the box body, and the air outlet flange is fixedly arranged on an air outlet of the box body.

Preferably, the bottom of the box body is provided with a base, and the box body is fixedly arranged on the base through welding or bolts.

Preferably, the motor is an explosion-proof motor.

The utility model has the advantages that:

1. the utility model discloses be provided with the change device, when the protection net goes up to accumulate too much dust or protection network and appear damaging need clean or change, the accessible is changed the device and is dismantled the protection network fast, can realize carrying out quick assembly disassembly's purpose to the protection network through changing the device to convenient regularly clean the protection network, change or clean box inside.

2. The utility model discloses be provided with the explosion-proof ring of copper on the front bezel of impeller, the production of spark when explosion-proof ring of copper can prevent impeller and collector or box collision plays explosion-proof effect.

3. The utility model discloses be provided with the puigging in the box, the fan can be absorbed by the puigging at the noise that the during operation produced, possesses the function of making an uproar of falling.

The features and advantages of the present invention will be described in detail with reference to the accompanying drawings.

Drawings

Fig. 1 is an exploded view of the present invention;

FIG. 2 is a schematic structural view of the case of the present invention;

FIG. 3 is a sectional view of the box body of the present invention;

fig. 4 is a schematic view of the structure of the compressing block of the present invention;

fig. 5 is a schematic structural view of the impeller of the present invention;

fig. 6 is a schematic diagram of the explosion-proof ring structure of the present invention.

In the figure: the anti-explosion device comprises an air inlet flange 101, a current collector 102, a box body 103, a noise reduction layer 1031, an anti-explosion layer 1032, a base 104, an impeller 105, a motor pedestal 106, a motor 107, an air outlet flange 108, a protective net 109, an anti-explosion ring 110, an inner convex ring 111, a front disc 201, blades 202, a hub 203, a replacing device 301, an accommodating cavity 302, a spring 303, a pressing block 304, a pressing groove 305, a rotating rod 306, a limiting block 307 and a bottom support 308.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.

As shown in fig. 1 to 6, an explosion-proof direct connection centrifugal fan box comprises a box body 103, a current collector 102, an impeller 105 and a motor 107 connected with the impeller 105, wherein the box body 103 is provided with openings at two sides and is hollow, the opening at the left side is an air inlet, the opening at the right side is an air outlet, a protective screen 109 is arranged at the opening of the box body 103, a replacing device 301 is fixedly arranged at two sides of the opening of the box body 103, the protective screen 109 is arranged in the replacing device 301, the protective screen 109 prevents large granular substances from entering the box body 103, the impeller 105 is prevented from colliding with the large granular substances to generate sparks in the rotating process, and a good explosion-proof effect is achieved.

In this embodiment, the replacing device 301 includes an accommodating cavity 302, a spring 303 and a pressing block 304, the spring 303 and the pressing block 304 are connected and are both located in the accommodating cavity 302, one end of the spring 303 is fixed on an inner wall of the accommodating cavity 302, the other end of the spring 303 is fixed with the pressing block 304, one end of the pressing block 304 is provided with a pressing groove 305, the pressing groove 305 faces the protection net 109, the pressing block 304 is provided with a rotation rod 306 movably connected, and two sides of the accommodating cavity 302 are provided with limit blocks 307 used in cooperation with the rotation rod 306.

In this embodiment, the inner surface of the box 103 is provided with a noise reduction layer 1031, the thickness of the noise reduction layer 1031 is 2cm, the noise reduction layer 1031 is made of soundproof cotton, noise generated by the fan during operation can be absorbed by the soundproof layer 1031, and the noise reduction function is achieved.

In this embodiment, the inside of the box body 103 is fixedly provided with an explosion-proof layer 1032, the thickness of the explosion-proof layer 1032 is 5mm, the noise reduction layer 1031 is located between the box body 103 and the explosion-proof layer 1032, and both the box body 103 and the explosion-proof layer 1032 are made of steel plates, so that a good explosion-proof effect is achieved.

In this embodiment, the impeller 105 includes a front disk 201, a plurality of blades 202 and a hub 203, one side of each blade 202 is fixedly connected with the front disk 201, and the other side of each blade is fixedly connected with the hub 203, the impeller 105 employs the arc-shaped front disk 201 and the backward inclined plate-type blades 202, wherein the arc-shaped front disk 201 and the outlet section of the current collector 102 are in smooth transition, so that a turbulent flow region generated when gas enters the impeller 105 is smaller, the length of each blade 202 is moderate, the width of each blade 202 is larger, the air volume is larger while a certain pressure energy is provided, and lower noise can be ensured at the same time, the flow cross section of a flow passage formed by the front disk 201, the blades 202 and the hub 203 is slowly increased, so that the gas velocity gradient is not too large, the gas flow loss is reduced, and the energy conversion efficiency between the impeller 105 and the gas is improved.

In this embodiment, an explosion-proof ring 110 made of copper is fixedly arranged on the outer surface of the front disc 201, the shape of the explosion-proof ring 110 is the same as that of the front disc 201, an inward inner flange 111 is arranged at one end of the explosion-proof ring 110 adjacent to the current collector 102, a plurality of threaded holes are arranged on the explosion-proof ring 110, threaded holes are also arranged at positions of the front disc 201 corresponding to the threaded holes on the explosion-proof ring 110, the explosion-proof ring 110 is fixedly connected to the front disc 201 through matching of bolts, nuts and the threaded holes, the explosion-proof ring 110 is of an annular structure, the width of the inner flange 111 is 2mm, the front disc 201 is completely covered, when the impeller 105 rubs with the current collector 102 or the box body 103, the explosion-proof ring 110 on the outer surface of the impeller 105 rubs, and because the hardness of copper is low, sparks are not generated during the rubbing, and the explosion-proof ring can play a role.

In this embodiment, a motor pedestal 106 is further disposed inside the box 103, the motor 107 is fixedly connected to the motor pedestal 106 by welding, a bottom support 308 is further disposed outside the box 103, and the protection net 109 is disposed on the bottom support 308.

In this embodiment, an air inlet flange 101 and an air outlet flange 108 are disposed outside two sides of the box 103, the air inlet flange 101 is fixedly disposed on an air inlet of the box 103, and the air outlet flange 108 is fixedly disposed on an air outlet of the box 103.

In this embodiment, a base 104 is disposed at the bottom of the box 103, and the box 103 is fixedly disposed on the base 104 by welding.

In this embodiment, the motor 107 is a motor of type YB3-112S-4 produced by Youshi corporation, or YB3-160L-4 produced by Zhejiang Innovation Motor Co., ltd, or M2JAX100L4A produced by Siemens, and the motors have good explosion-proof effects, so that the safety of the working environment is greatly improved, and the motor 107 can also perform frequency conversion to change the rotating speed of the impeller 105 and adjust the air volume.

The utility model relates to an explosion-proof direct connection centrifugal fan case, its theory of operation:

when the protection network 109 needs to be cleaned or changed, only need to stimulate compact heap 304 to the outside, compact heap 304 can compress spring 303 at the in-process of pulling, rotatory rod 306 that changes when the pulling reaches the certain distance, it is rotatory to vertical form to change rod 306, change rod 306 this moment and can block behind stopper 307, then just can take out protection network 109 and wash or change, air intake and air outlet department can be put again to protection network 109 after washing or changing, then will change rod 306 rotatory to the level form, spring 303 resets, compact heap 304 moves towards protection network 109 under spring 303's effect, thereby fix protection network 109 again on air intake and air outlet, can realize the quick dismantlement to protection network 109 through changing device 301, the utility model discloses a fan adopts direct-coupling transmission structure, has cancelled transmission parts such as belt, bearing, has not only improved fan efficiency, has reduced the maintenance of fan, has still practiced thrift fan cost.

The above description is only a preferred embodiment of the present invention, and should not be construed as limiting the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides an explosion-proof centrifugal fan case that directly allies oneself with, includes box, collector, impeller and the motor of being connected with the impeller, its characterized in that, box both sides opening and inside cavity, the box opening part all is provided with the protection network, box opening part both sides are provided with the change device, the protection network sets up in the protection network, it includes holding chamber, spring and compact heap to change the device, spring and compact heap are connected and all are located the holding chamber.

2. The anti-explosion direct-connection centrifugal fan box according to claim 1, wherein a pressing groove is formed in one end of the pressing block, the pressing groove faces towards the protective net, a rotating rod is movably connected to the pressing block, and limiting blocks matched with the rotating rod are arranged on two sides of the accommodating cavity.

3. The anti-explosion direct-connection centrifugal fan box according to claim 2, wherein at least one noise reduction layer is arranged on the inner surface of the box body, and the thickness of the noise reduction layer is 1-3cm.

4. The anti-explosion direct-connection centrifugal fan box according to claim 3, wherein at least one anti-explosion layer is arranged inside the box body, and the thickness of the anti-explosion layer is 3-5mm.

5. The blower box of claim 4, wherein the impeller comprises a front disk, a plurality of blades and a hub, and one side of each blade is connected with the front disk and the other side of each blade is connected with the hub.

6. An explosion-proof direct-connection centrifugal fan box according to claim 5, wherein an explosion-proof ring is arranged on the outer surface of the front disk, the shape of the explosion-proof ring is consistent with that of the front disk, and an inward convex ring is arranged at one end of the explosion-proof ring.

7. The explosion-proof direct-connection centrifugal fan box according to claim 6, wherein a motor pedestal is further arranged inside the box body, the motor is connected to the motor pedestal, a bottom support is further arranged outside the box body, and the protective net is arranged on the bottom support.

8. The anti-explosion direct-connection centrifugal fan box according to claim 7, wherein an air inlet flange and an air outlet flange are arranged on the outer portions of two sides of the box body.

9. The anti-explosion direct-connection centrifugal fan box according to claim 8, wherein a base is arranged at the bottom of the box body, and the box body is arranged on the base.