Purification fan anti-inversion device for flue gas purification system

Abstract

The utility model relates to the technical field of flue gas purification equipment, in particular to an anti-inversion device for a purification fan of a flue gas purification system, and aims to solve the problem that the fan is inverted due to negative pressure caused by operation of other fans in the system. The device comprises a central shaft and fan blades in a cylinder shell, the end part of the central shaft is provided with a clasping ring channel formed by a clasping cylinder and an outer guide cylinder, and an anti-inversion module is arranged between the clasping cylinder and the outer guide cylinder. The anti-inversion module is connected with a plurality of anti-inversion assemblies through rotating rods, each anti-inversion assembly comprises a floating brake block, and automatic braking and inversion prevention are achieved through centrifugal force and spring assemblies. Particularly, one-way inclined teeth are arranged on the enclasping cylinder and matched with anti-reverse rotation teeth on the floating brake block, so that the anti-reverse rotation effect is enhanced, and normal starting is not affected. The flue gas purification system is simple in structure, high in automation degree, suitable for severe environments and low in cost, and the safety and the efficiency of the flue gas purification system are effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to flue gas purification equipment technical field, concretely relates to a kind of purification fan anti-reversing device for flue gas purification system. BACKGROUND

[0002] The information disclosed in the background of the utility model is only intended to increase the understanding of the overall background of the utility model, and is not necessarily considered to acknowledge or imply in any form that the information constitutes prior art known to those skilled in the art.

[0003] In the flue gas purification system, the electrolytic cell flue gas is extracted by multiple parallel purification fans, and is discharged after dust removal treatment. The fan needs to be operated synchronously for a long time, and when a single unit is shut down for maintenance, the negative pressure generated by other running fans can cause the impeller of the shutdown fan to reverse. The existing solution is to install a manual holding device on the rear shaft box of the fan, and manually hold the shaft body after shutdown to prevent reverse. However, this solution requires frequent manual intervention, increases maintenance costs, and has low operation efficiency. Moreover, manual operation near running equipment poses a mechanical injury risk and safety hazards. In addition, the initial reverse cannot be automatically inhibited, causing accelerated damage to bearings, gears and other components.

[0004] Although the existing technology such as electromagnetic brake can partially solve the reverse problem, it has a complex structure or high cost, and is difficult to adapt to the dust and high-temperature working conditions of the flue gas purification system. Therefore, there is an urgent need for a simple structure that can automatically trigger the anti-reverse device. UTILITY MODEL CONTENT

[0005] To solve the above technical problems, the utility model provides a kind of purification fan anti-reversing device for flue gas purification system, to solve how to prevent the reverse phenomenon of purification fan in shutdown state due to the negative pressure caused by the operation of other fans in system, and reduce the safety risk and equipment wear caused by manual stopping fan reverse problem.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A kind of purification fan anti-reversing device for flue gas purification system, including cylinder shell, rotatable central shaft is installed in the cylinder shell, fan blade is fixedly installed on the central shaft;

[0008] The cylinder shell air inlet end is fixedly provided with a holding cylinder, an outer guide cylinder is fixedly arranged outside the holding cylinder, a holding ring channel is formed between the holding cylinder and the outer guide cylinder, and an anti-reverse module is fitted and installed in the holding ring channel.

[0009] The anti-reverse module includes a mounting seat concentrically fixed to the end of the central shaft, and a plurality of anti-reverse assemblies are installed on the mounting seat through a plurality of rotating rods.

[0010] The anti-reverse assembly comprises a guide slider which is slidingly fitted on the inner side wall of the outer guide cylinder, the guide slider is installed on a bent rod which extends into the embracing ring channel, a guide rod which points to the central shaft is arranged on the bent rod, a spring assembly and a sliding sleeve are sleeved on the guide rod, and a floating brake block is arranged on one end of the sliding sleeve which is close to the embracing cylinder; the floating brake block floats above the embracing cylinder under the action of centrifugal force when the rotating rod and the central shaft rotate, and the floating brake block is tightly attached to the embracing cylinder under the action of the spring assembly when the rotating rod and the central shaft stop rotating, so as to brake.

[0011] Preferably, the outer side wall of the embracing cylinder is provided with one-way inclined teeth, and the inclined direction of the one-way inclined teeth is consistent with the forward rotation direction of the fan blades.

[0012] Preferably, the floating brake block is provided with anti-reverse teeth which are consistent with the direction of the one-way inclined teeth on the cooperating arc surface opposite to the embracing cylinder.

[0013] Preferably, the guide slider is arranged as a guide roller which is installed on the bent rod.

[0014] Preferably, the bent rod and the rotating rod are integrally formed.

[0015] Preferably, the end of the central shaft is provided with a shaft head, the mounting seat is sleeved on the shaft head, and the mounting seat is fixedly connected through a flange plate.

[0016] Preferably, the fan blades are provided with a protective net, and the protective net is fixedly installed on the end of the outer guide cylinder.

[0017] The utility model at least has following beneficial effects:

[0018] The utility model can automatically realize anti-reverse after the fan stops, does not need manual intervention, and prevents the reverse rotation of the central shaft through the close attachment of the floating brake block and the embracing cylinder. This not only reduces the frequency and difficulty of manual operation, but also greatly reduces the safety hazards caused by manual access to the running equipment.

[0019] Compared with the prior art such as electromagnetic brake, the utility model has relatively simple structure, pure mechanical structure, can better adapt to the working environment of high temperature and much dust in the flue gas purification system, and has lower cost. DRAWINGS

[0020] Figure 1 It is a whole structure schematic view of the utility model;

[0021] Figure 2 It is Figure 1 It is an enlarged structure schematic view of A in the middle.

[0022] The reference signs involved in the drawings are:

[0023] 100, barrel shell; 200, central shaft; 210, shaft head; 300, fan blade; 400, holding barrel / 410, single inclined tooth; 500, outer guide barrel; 600, anti-reversing module; 601, bending rod; 610, mounting seat; 620, anti-reversing assembly; 621, guide rod; 622, spring assembly; 623, sliding sleeve; 624, floating brake block; 625, anti-reversing tooth; 630, guide sliding block. DETAILED DESCRIPTION

[0024] In order for those skilled in the art to better understand the present application, the technical solutions of the present application are further described below in combination with the drawings and examples.

[0025] Figures 1 to 2 A kind of purification fan anti-reversing device for flue gas purification system is shown, including barrel shell 100, rotatable central shaft 200 is installed in the barrel shell 100, and fan blade 300 is installed and fixed on the central shaft 200.

[0026] The inlet end of the barrel shell 100 is fixedly provided with a holding barrel, the outer side of the holding barrel is fixedly provided with an outer guide barrel 500, a holding ring channel is formed between the holding barrel and the outer guide barrel 500, and an anti-reversing module 600 is fitted and installed in the holding ring channel.

[0027] The anti-reversing module 600 includes a mounting seat 610 concentrically fixed to the end of the central shaft 200, a plurality of anti-reversing assemblies 620 are installed on the mounting seat 610 through a plurality of rotating rods, and generally 3-6 groups are sufficient, and 3 groups are taken as an example in the present example.

[0028] The anti-reversing assembly 620 includes a guide sliding block 630 slidingly fitted in the inner wall of the outer guide barrel 500, the guide sliding block 630 is installed on a bending rod 601 extending into the holding ring channel, a guide rod 621 pointing to the center rod is arranged on the bending rod 601, a spring assembly 622 and a sliding sleeve 623 are sleeved on the guide rod 621, and a floating brake block 624 is arranged at one end of the sliding sleeve 623 close to the holding barrel, specifically, the spring assembly 622 is sleeved on the guide rod 621 between the bending rod 601 and the floating brake block 624, for generating elastic force to press the floating brake block 624 onto the holding barrel.

[0029] The working principle and process of the floating brake block 624 are as follows: after the device is started, the floating brake block 624 is floated above the holding cylinder and is separated from the brake when the rotating rod and the central shaft 200 rotate under the action of centrifugal force, and overcomes the elastic force of the spring assembly 622. When the device is stopped, the floating brake block 624 is tightly attached to the holding cylinder under the action of the spring assembly 622 to achieve braking and prevent the fan from reversing, because the centrifugal force is lost when the rotating rod and the central shaft 200 stop rotating.

[0030] In another preferred embodiment, in order to improve the anti-reversing capability, the outer side wall of the holding cylinder is provided with one-way inclined teeth, the inclined direction of the one-way inclined teeth is consistent with the forward rotation direction of the fan blade 300, and the floating brake block 624 is provided with anti-reversing teeth 625 on the matching arc surface opposite to the holding cylinder, which are consistent with the direction of the one-way inclined teeth. Therefore, the fan is not affected when it works in the forward rotation direction, and greater resistance is generated when the fan reverses, thereby preventing the fan from reversing. In particular, the floating brake block 624 can slide on the one-way inclined teeth when the fan is just started, and the above-mentioned arrangement does not affect the normal start of the fan. When the fan is stopped and starts to reverse, great resistance is generated, thereby greatly improving the anti-reversing capability of the fan.

[0031] In another preferred embodiment, the guide sliding block 630 is arranged as a guide roller mounted on the bent rod 601, and rolling friction is used instead of sliding friction, thereby reducing the load of the fan.

[0032] The bent rod 601 and the rotating rod are integrally formed, and can be arranged as an L-shaped rod, so that the integrity is better, and the stability and reliability of the device are further improved.

[0033] In another preferred embodiment, in order to strengthen the installation stability of the anti-reversing module 600, the end of the central shaft 200 is provided with a shaft head 210, the mounting seat 610 is first sleeved on the shaft head 210 and is provided with a pin key, and then is fixed by a flange plate. The shaft head 210 provides a central base, improves the accuracy of positioning, ensures that the center line of the central shaft 200 is coincident, and then provides stable connection by the flange plate, thereby achieving double installation and fixation.

[0034] In another preferred embodiment, the fan blade 300 is provided with a protective net (not shown in the figure), the protective net is fixedly installed at the end of the outer guide cylinder 500, and the anti-reversing module 600 and the fan blade 300 are wrapped on the inner side, thereby avoiding the risk of mechanical injury caused by the rotation of the rotating rod, avoiding safety hazards, and improving the overall safety performance of the device.

[0035] In summary, the device comprises a central shaft 200 and fan blades 300 in a barrel housing 100, the central shaft 200 is provided with a holding ring channel formed by a holding barrel and an outer guide barrel 500, and a anti-reverse module 600 is installed therebetween. The anti-reverse module 600 is connected with a plurality of anti-reverse assemblies 620 through a rotating rod, each of the anti-reverse assemblies 620 comprises a floating brake block 624, and the automatic brake anti-reverse is realized by centrifugal force and a spring assembly 622. In particular, a one-way inclined tooth is arranged on the holding barrel, and cooperates with an anti-reverse tooth 625 on the floating brake block 624, so that the anti-reverse effect is enhanced without affecting normal starting. The utility model has the advantages of simple structure, high automation degree, low cost, adaptation to severe environment, and effective improvement of safety and efficiency of the flue gas purification system.

[0036] The terms "upper", "lower", "outer", "inner" and the like in the description and claims of the utility model and the above drawings, if any, are used to distinguish the relative position, and do not have to be given the nature. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the utility model described herein can be implemented in the order other than those illustrated or described herein. In addition, the terms "include" and "have" and any modification thereof are intended to cover non-exclusive inclusion.

[0037] The above description of the disclosed embodiments enables those skilled in the art to implement or use the utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A purification fan anti-reversing device for a flue gas purification system, comprising a cylindrical shell, a rotatable central shaft installed in the cylindrical shell, and fan blades fixed on the central shaft; characterized in that: a clamping cylinder is fixedly arranged at the air inlet end of the cylindrical shell, an outer guide cylinder is fixedly arranged outside the clamping cylinder, a clamping ring channel is formed between the clamping cylinder and the outer guide cylinder, and an anti-reversing module is cooperatively installed in the clamping ring channel; the anti-reversing module comprises a mounting seat concentrically fixed at the end of the central shaft, a plurality of anti-reversing assemblies are installed on the mounting seat through a plurality of rotating rods; the anti-reversing assembly comprises a guide slider slidingly fitted on the inner sidewall of the outer guide cylinder, the guide slider is installed on a bent rod extending into the clamping ring channel, a guide rod pointing to the central rod is arranged on the bent rod, a spring assembly and a sliding sleeve are sleeved on the guide rod, and a floating brake block is arranged at one end of the sliding sleeve close to the clamping cylinder; the floating brake block floats above the clamping cylinder under the action of centrifugal force when the rotating rod and the central shaft rotate, and the floating brake block is tightly attached to the clamping cylinder to brake under the action of the spring assembly when the rotating rod and the central shaft stop rotating.

2. The purification fan anti-reversing device for a flue gas purification system according to claim 1, characterized in that: one-way inclined teeth are arranged on the outer sidewall of the clamping cylinder, and the inclined direction of the one-way inclined teeth is consistent with the forward rotation direction of the fan blades.

3. The purification fan anti-reversing device for a flue gas purification system according to claim 2, characterized in that: the floating brake block is provided with anti-reversing teeth consistent with the direction of the one-way inclined teeth on the cooperating curved surface opposite to the clamping cylinder.

4. The purification fan anti-reversing device for a flue gas purification system according to claim 1, characterized in that: the guide slider is arranged as a guide roller installed on the bent rod.

5. The purification fan anti-reversing device for a flue gas purification system according to claim 1, characterized in that: the bent rod and the rotating rod are integrally formed.

6. The purification fan anti-reversing device for a flue gas purification system according to claim 1, characterized in that: a shaft head is arranged at the end of the central shaft, the mounting seat is sleeved on the shaft head, and the mounting seat is fixedly connected through a flange plate.

7. The purification fan anti-reversing device for a flue gas purification system according to any one of claims 1 to 6, characterized in that: the fan blades are provided with a protective net fixedly installed at the end of the outer guide cylinder. ​ ​ ​ ​ ​ ​ ​

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