Air filter

Abstract

The utility model aims to provide an air filter, which belongs to auxiliary instruments of turbochargers and comprises a casing, an inner cylinder and a core bar, the inner cylinder is mounted in the casing, a filter screen is mounted below the inner cylinder, a mounting plate is fixed on the inner cylinder, an annular space is formed by the casing and the side wall of the inner cylinder, a compressed air inlet is arranged on the side of the casing, and a compressed air outlet is arranged on the side of the casing. A compressed air inlet is formed in the upper portion of the shell, a compressed air outlet is formed in the upper portion of the shell, the compressed air inlet is communicated with the annular space, the compressed air outlet is communicated with the shell space above the installation plate, a core bar is installed in the inner cylinder, the side wall of the core bar is hollowed out, the bottom of the core bar is closed, the top end of the core bar is installed on the installation plate, and the shell space above the installation plate is communicated with the interior of the core bar. The utility model is suitable for a monitoring and protecting system of a turbocharger set, and can filter water and impurities in compressed air provided by a public system.

Description

Technical Field

[0001] This utility model relates to an air filter, specifically a filter in a turbocharger unit monitoring and protection system. Background Technology

[0002] Turbochargers are crucial components in steam power systems. They ensure complete fuel combustion, improving combustion efficiency. Turbochargers play a vital role in booster boiler systems.

[0003] A turbocharger unit consists of four parts: an auxiliary steam turbine, a reducer, a compressor, and a flue gas turbine. Its operating principle is to use boiler flue gas and steam as power to drive the rotation of an axial-flow compressor. Therefore, it requires specialized surge protection devices, overspeed limiting devices, overspeed protection devices, and corresponding sensors.

[0004] These protective devices connect the measuring points and actuators via pipelines. The working medium is compressed air. Each protective device is designed with a precision valve structure; therefore, if the compressed air flowing through the pipeline contains impurities, there is a risk of the valves not closing tightly. This can cause the actuator to malfunction, affecting the operation of the turbocharger unit and shortening the service life of the protective devices. If the compressed air contains water, the pipelines and valves of the protective devices will be in a humid environment for a long time, posing a risk of corrosion. Rust will also flow with the compressed air, causing the valves to not close tightly. This can further prevent the unit from operating normally and shorten the service life of the protective devices. Summary of the Invention

[0005] The purpose of this invention is to provide an air filter suitable for monitoring and protection systems of turbocharger units and capable of providing clean and dry compressed air.

[0006] The purpose of this utility model is achieved as follows:

[0007] This utility model discloses an air filter, characterized by comprising a shell, an inner cylinder, and a core. The inner cylinder is installed inside the shell, a filter screen is installed below the inner cylinder, and a mounting plate is fixed on the inner cylinder. The shell and the side walls of the inner cylinder form an annular space. A compressed air inlet is provided on the side of the shell, and a compressed air outlet is provided on the top of the shell. The compressed air inlet communicates with the annular space, and the compressed air outlet communicates with the shell space above the mounting plate. The core is installed inside the inner cylinder, and the side walls of the core are hollowed out. The bottom of the core is closed, and the top of the core is mounted on the mounting plate. The shell space above the mounting plate communicates with the interior of the core.

[0008] This utility model may also include:

[0009] 1. The sidewalls of the core are wrapped with two layers of plain square-hole screens with different mesh counts.

[0010] 2. There are four core members, which are evenly distributed inside the inner cylinder.

[0011] 3. The filter screen at the bottom of the inner cylinder is a plain-weave square-hole screen.

[0012] 4. A manual drain valve is connected to the bottom of the housing via an adapter.

[0013] 5. The hollow design of the core sidewall is a waist-shaped hole.

[0014] 6. The inner cylinder above the filter screen has holes on its side wall.

[0015] The advantages of this invention are as follows: This invention is applicable to the monitoring and protection system of turbocharger units, and can filter out water and impurities in the compressed air provided by the public system. It allows dry, clean compressed air to enter the system as the working medium, thereby preventing the precision valves in other protective components of the monitoring and protection system from malfunctioning due to impurities mixed in the working medium, which could lead to incomplete valve closure and malfunction of the actuators in the monitoring and protection system, resulting in unstable operation of the turbocharger unit. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the inner cylinder assembly.

[0018] Figure 3 This is a schematic diagram of the core assembly. Detailed Implementation

[0019] The present invention will now be described in more detail with reference to the accompanying drawings:

[0020] Combination Figure 1-3 This utility model includes a shell assembly 2, an inner cylinder assembly 3, a core assembly 4 and 10, an interface assembly, an end cap 5, a rubber sealing ring 9, and a manual exhaust valve 11. A compressed air inlet 1 and a compressed air outlet 8 are respectively provided on the shell assembly 2.

[0021] Core assembly 4 and 10 include core 14, which has a hollow structure and consists of four sets. Core 14 has a waist-shaped hole as an inlet for compressed air. Two layers of plain-weave square-hole screens 15 with different mesh sizes are welded to the outer surface of core 14. Inner cylinder assembly 3 includes inner cylinder 12, the inner and outer surfaces of which are plated with brass, and a plain-weave square-hole screen 13 is welded to the bottom. The bottom of shell assembly 2 is connected to a manual exhaust valve 11 via an adapter 6.

[0022] The working process of this utility model after being connected to the turbocharger unit monitoring and protection system is as follows: the utility model is installed on the turbocharger unit using a bracket. Interface 1 is the inlet of this utility model, connected to the air supply pipeline of the common system. Interface 8 is the outlet of this utility model, connected to the turbocharger unit monitoring and protection system.

[0023] Compressed air enters the annular space formed by the inner wall of the housing 2 and the outer wall of the inner cylinder 3 through interface 1, where it immediately swirls. Under centrifugal force, impurities and water flow along the inner wall of the housing 2 to the bottom. The separated compressed air enters the inner cylinder through the filter screen 13 welded to the bottom of the inner cylinder 3, and then enters through the inlet of the four hollow core bones 4 with filter screens 15 welded to the outer surface, before entering the monitoring and protection system through interface 8.

[0024] This invention employs a combination of cyclone filtration and barrier filtration. Circulation is generated within the annular space formed by the inner wall of the shell 2 and the outer wall of the inner cylinder 3, filtering out water and impurities. Simultaneously, the filter screen 13 welded to the lower part of the inner cylinder 3 and the filter screen 15 welded to the outside of the core 4 cause water to condense into droplets, thus blocking and filtering out impurities.

Claims

1. An air filter, characterized in that: The device includes a shell, an inner cylinder, and a core. The inner cylinder is installed inside the shell, and a filter screen is installed below the inner cylinder. A mounting plate is fixed on the inner cylinder. The shell and the side walls of the inner cylinder form an annular space. A compressed air inlet is provided on the side of the shell, and a compressed air outlet is provided on the top of the shell. The compressed air inlet communicates with the annular space, and the compressed air outlet communicates with the shell space above the mounting plate. The core is installed inside the inner cylinder. The side walls of the core are hollowed out, the bottom of the core is closed, and the top of the core is mounted on the mounting plate. The shell space above the mounting plate communicates with the interior of the core.

2. An air filter according to claim 1, characterized in that: The sidewalls of the core are wrapped with two layers of plain-weave square-hole screens with different mesh counts.

3. An air filter according to claim 1, characterized in that: There are four core members, which are evenly distributed inside the inner cylinder.

4. An air filter according to claim 1, characterized in that: The filter screen at the bottom of the inner cylinder is a plain-weave square-hole screen.

5. An air filter according to claim 1, characterized in that: A manual drain valve is connected to the bottom of the housing via an adapter.

6. An air filter according to claim 1, characterized in that: The hollow design on the side wall of the core bone is a waist-shaped hole.

7. An air filter according to claim 1, characterized in that: The inner cylinder above the filter screen has holes on its side wall.

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