CN205868503U - A sealing fan for coal pulverizer - Google Patents

Abstract

The utility model discloses a sealed blower used for a coal mill. The coal mill includes a coal mill body, a feed port and a conveying mechanism. The conveying mechanism corresponds to the position of the feed port. The feed port is connected to the On the machine body, the sealed fan includes a controller, fan body, frequency converter and air supply pipe. The controller is connected to the fan body through the frequency converter, and the fan body is connected to the sealing protective cover on the coal mill body through the air supply pipe. And there is a coal amount detection mechanism on the feed port, the coal amount detection mechanism is connected with the controller, and the coal amount detection mechanism is used to detect the amount of coal entering the feed port and feeds back to the controller, the controller according to the coal amount The size control frequency converter changes the speed of the fan body. The utility model can reasonably adjust the differential pressure of the sealing air, so that the sealing fan is in the most economical operation state at all times, and the energy consumption and the use cost are reduced.

Description

A sealed fan for coal mill

technical field

The utility model relates to the technical field of coal pulverizers, in particular to a sealed fan for coal pulverizers.

Background technique

The sealing fan in the prior art has a large current during power frequency operation, consumes a lot of power outside the sealing air differential pressure that meets the operation of the coal mill, and cannot adjust the sealing air differential pressure according to the amount of coal fed into the coal mill. , resulting in a large energy consumption of the sealed fan and a high cost of use.

Utility model content

The utility model mainly solves the technical problems existing in the prior art, thereby providing a sealing blower for coal mills with adjustable sealing air differential pressure and low energy consumption.

The above-mentioned technical problems of the utility model are mainly solved by the following technical solutions:

The utility model provides a sealed fan for a coal mill, the coal mill includes a coal mill body, a feed port and a conveying mechanism, the conveying mechanism corresponds to the position of the feed port, and the feed port The feed port is connected to the coal mill body, the sealed fan includes a controller, a fan body, a frequency converter and an air supply pipe, the controller is connected to the fan body through the frequency converter, and the fan body The main body is connected to the sealing protection cover on the coal mill body through the air supply pipe, and a coal amount detection mechanism is provided on the feed inlet, and the coal amount detection mechanism is connected to the controller, and The coal amount detection mechanism is used to detect the amount of coal entering the feed port and feed it back to the controller, and the controller controls the frequency converter to change the speed of the fan body according to the amount of coal.

Further, the coal amount detection mechanism includes a bracket, an angle detector and an angle detection lever, the bracket is fixed above the feed inlet, the angle detector is fixed at the cantilever end of the bracket, the The angle detector is respectively connected with the angle detection lever and the controller, and the angle detection lever is located at the entrance of the feeding port.

Further, an air filter is also provided on the air supply pipe.

Further, a discharge port is provided at the bottom of the coal mill body, and a discharge valve is provided on the discharge port.

The beneficial effect of the utility model is that: the amount of coal entering the feed port is detected by the coal amount detection mechanism, and fed back to the controller, and the controller controls the frequency converter according to the amount of coal to change the speed of the fan body, thereby reasonably adjusting The sealing air differential pressure makes the sealing fan operate in the most economical state at all times, reducing energy consumption and use costs.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a structural schematic diagram of a sealed fan used in a coal pulverizer according to the present invention.

detailed description

The preferred embodiments of the utility model will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the utility model can be more easily understood by those skilled in the art, so as to make a clearer definition of the protection scope of the utility model.

Referring to Fig. 1, the utility model is used for a sealed fan for a coal mill. The coal mill includes a coal mill body 1, a feed port 2 and a conveying mechanism 3, and the conveying mechanism 3 corresponds to the position of the feed port 2. , the feed port 2 is connected to the coal mill body 1, the sealed fan includes a controller 4, a fan body 5, a frequency converter 6 and an air supply pipe 7, the controller 4 is connected to the fan body 5 through a frequency converter 6, and the fan body 5 is connected with the sealing protective cover 8 on the coal mill body 1 through the air supply pipe 7, and a coal quantity detection mechanism 9 is provided on the feed port 2, and the coal quantity detection mechanism 9 is connected with the controller 4, and the coal quantity The detection mechanism 9 is used to detect the amount of coal entering the feed port 2 and feed it back to the controller 4. The controller 4 controls the frequency converter 6 to change the speed of the fan body 5 according to the amount of coal. Wherein, the sealing protective cover 8 is mainly used to apply the wind pressure generated by the fan body 5 to the coal mill body 1 .

The utility model detects the amount of coal entering the feed port 2 through the coal amount detection mechanism 9, and feeds back to the controller 4, and the controller 4 controls the frequency converter 6 according to the amount of coal to change the speed of the fan body 5, thereby Reasonably adjust the differential pressure of the sealing air, so that the sealing fan is in the most economical operating state at all times, reducing energy consumption and use costs.

Specifically, the coal amount detection mechanism 9 includes a bracket 91, an angle detector 92 and an angle detection lever 93, the bracket 91 is fixed above the feed port 2, the angle detector 92 is fixed on the cantilever end of the bracket 91, and the angle detector 92 They are respectively connected with the angle detection lever 93 and the controller 4, and the angle detection lever 93 is located at the entrance of the feed port 2. In the process of coal entering the feed port 2, the angle detection lever 93 is blocked by coal and produces an angle offset. The larger the amount of coal, the greater the angle offset, so that the angle detector 92 and the angle detection lever 93 can Determine the size of the coal intake.

Preferably, in order to ensure the cleanliness of the air and reduce the pollution of dust in the air to the coal mill body 1 , an air filter 10 is also provided on the air supply pipe 7 .

In this embodiment, in order to facilitate regular discharge of impurities, a discharge port 11 is provided at the bottom of the coal mill body 1, and a discharge valve 12 is provided on the discharge port 11.

The above are only specific implementations of the present utility model, but the protection scope of the present utility model is not limited thereto, and any changes or replacements that do not go through creative labor should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be determined by the protection scope defined in the claims.

Claims (4)

1., for a seal fan for coal pulverizer, described coal pulverizer includes coal pulverizer body, charging aperture and conveying mechanism, described Conveying mechanism is corresponding with the position of described charging aperture, and described charging aperture is connected on described coal pulverizer body, it is characterised in that Described seal fan includes controller, fan body, converter and ajutage, and described controller is through described converter and described wind Machine body is connected, and described fan body is connected with the sealing protective on described coal pulverizer body through described ajutage, with And described charging aperture is provided with a coal amount detection machine structure, described coal amount detection machine structure is connected with described controller, and described coal Amount detection machine structure for detection enter into the coal amount in described charging aperture and feed back in described controller, described controller according to The size of coal amount controls described converter and changes the rotating speed of described fan body.

2. the seal fan for coal pulverizer as claimed in claim 1, it is characterised in that described coal amount detection machine structure includes propping up Frame, angle detector and angle detection driving lever, described support is fixed on the top of described charging aperture, and described angle detector is fixed At the cantilever end of described support, described angle detector is connected with described angle detection driving lever and controller respectively, described angle Degree detection driving lever is positioned at the porch of described charging aperture.

3. the seal fan for coal pulverizer as claimed in claim 2, it is characterised in that be additionally provided with on described ajutage Air filter.

4. the seal fan for coal pulverizer as claimed in claim 3, it is characterised in that the bottom of described coal pulverizer body is also Being provided with a discharge port, described discharge port is provided with discharge valve.