Pre-filter of compressor

Abstract

The utility model discloses a pre-filter of a compressor, which relates to the technical field of compressors and comprises a shell component, a filter element component is in threaded connection with the inside of the shell component, one end of the filter element component is in threaded connection with a sealing cover component, the filter element component comprises an inner pipe, an inner air hole group is arranged on the outer surface of the inner pipe, and an outer air hole group is arranged on the outer surface of the inner pipe. Two groups of limiting rings are connected to the positions, located on the two sides of the inner air hole groups, of the outer surface of the inner pipe, a second external thread is formed in the outer surface of the opening end of the inner pipe, a protruding block is connected to the center of the side face of the other end of the inner pipe, and filter cotton is arranged at the position, located between the two inner air hole groups, of the outer portion of the inner pipe; one end of the shell is connected with a connecting pipe, the outside of the free end of the connecting pipe is connected with a flange plate, the convex block is driven to rotate, so that the opening end of the inner pipe is mounted or dismounted in the screw cylinder, the mounting and dismounting of the filter element assembly are further realized, and the structure is convenient to clean or replace.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, in particular to a compressor pre-filter. Background Art

[0002] An air compressor is a device used to compress gas. The construction of an air compressor is similar to that of a water pump. Most air compressors are reciprocating piston type, with rotating blades or rotating screws. Centrifugal compressors are very common. The compressor is driven directly by an electric motor, which causes the crankshaft to rotate, driving the connecting rod to reciprocate the piston, causing the cylinder volume to change. Due to the change in pressure in the cylinder, air is forced into the cylinder through the air filter through the intake valve;

[0003] Traditional compressor filters are generally inconvenient to disassemble and clean during use, which greatly reduces the filtering effect in the later stage. For this reason, we propose a compressor pre-filter. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a compressor pre-filter, which solves the problems raised in the above background technology.

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: a compressor pre-filter, comprising a housing assembly, the inner thread of the housing assembly is connected to a filter element assembly, and one end of the filter element assembly is threadedly connected to a cover assembly;

[0006] The filter element assembly includes an inner tube, an outer surface of the inner tube is provided with an inner air hole group, the outer surface of the inner tube and two groups of limit rings are connected to the inner air hole group on both sides, a second outer thread is provided on the outer surface of the open end of the inner tube, a protrusion is connected to the center of the side surface of the other end of the inner tube, and filter cotton is arranged outside the inner tube and between the two groups of inner air holes.

[0007] As a further technical solution of the utility model, the shell assembly includes an outer shell, one end of the outer shell is connected to a connecting pipe, the free end of the connecting pipe is externally connected to a flange, the outer side surface of the open end of the outer shell is provided with a step groove, and the outer surface of the step groove is provided with a first external thread.

[0008] As a further technical solution of the utility model, a screw barrel is connected to the center of the inner side surface of the shell and one end close to the connecting pipe, and an outer pore group is opened on the outer surface of the shell.

[0009] As a further technical solution of the utility model, the screw barrel is threadedly connected to the outside of the open end of the inner tube, the positions of the outer pore group and the limiting ring correspond to each other, and the outer surface of the filter cotton fits the inner surface of the outer shell.

[0010] As a further technical solution of the utility model, the sealing cover assembly includes a sealing cover, and the inner annular surface of the sealing cover is provided with an internal thread.

[0011] As a further technical solution of the utility model, the structures of the internal thread and the first external thread are adapted to each other, and the opening end of the cover is located inside the stepped groove.

[0012] Beneficial Effects

[0013] The utility model provides a compressor pre-filter. Compared with the prior art, it has the following beneficial effects:

[0014] 1. A compressor pre-filter, which drives the protrusion to rotate so that the open end of the inner tube can be installed or removed in the screw barrel, thereby realizing the installation and removal of the filter element assembly. This structure is convenient for cleaning or replacement, and realizes secondary filtration of the air flow through the outer pore group and filter cotton.

[0015] 2. A compressor pre-filter, wherein the cover assembly seals the shell assembly by threading the open end of the cover in a stepped groove. This structure can seal the open end of the shell assembly, and the threaded connection facilitates disassembly or installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a compressor pre-filter;

[0017] Figure 2 It is a schematic diagram of the split structure of a compressor pre-filter;

[0018] Figure 3 A top view of a housing assembly in a compressor pre-filter;

[0019] Figure 4 for Figure 3 Sectional view of AA in the middle;

[0020] Figure 5 It is a schematic diagram of the disassembled structure of a filter element assembly in a compressor pre-filter;

[0021] Figure 6 The present invention is a schematic diagram of the structure of a sealing cover assembly in a compressor pre-filter.

[0022] In the figure: 1. Shell assembly; 11. Shell; 12. Connecting pipe; 13. Flange; 14. Screw barrel; 15. External air hole group; 16. Step groove; 17. First external thread; 2. Filter element assembly; 21. Inner tube; 22. Internal air hole group; 23. Limiting ring; 24. Second external thread; 25. Bump; 26. Filter cotton; 3. Sealing cap assembly; 31. Sealing cap; 32. Internal thread. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-2 The utility model provides a technical solution for a compressor pre-filter: a compressor pre-filter, comprising a shell assembly 1, the inner thread of the shell assembly 1 is connected to a filter element assembly 2, and one end of the filter element assembly 2 is threadedly connected to a cover assembly 3.

[0025] See also Figure 3-4 The filter element assembly 2 includes an inner tube 21, an inner pore group 22 is provided on the outer surface of the inner tube 21, two groups of limit rings 23 are connected to the outer surface of the inner tube 21 and located on both sides of the inner pore group 22, a second outer thread 24 is provided on the outer surface of the open end of the inner tube 21, a protrusion 25 is connected to the center of the side surface of the other end of the inner tube 21, and a filter cotton 26 is provided on the outside of the inner tube 21 and located between the two groups of inner pore groups 22.

[0026] It should be noted that the tool is used to drive the protrusion 25 to rotate, so that the open end of the inner tube 21 is installed or removed in the screw barrel 14, thereby realizing the installation and removal of the filter element assembly 2;

[0027] The airflow passes through the filter cotton 26 to filter impurities such as dust, and then enters the inner tube 21 through the inner air hole group 22.

[0028] See also Figure 5 The shell assembly 1 includes a shell 11, one end of the shell 11 is connected to a connecting pipe 12, the free end of the connecting pipe 12 is externally connected to a flange 13, the outer side surface of the open end of the shell 11 is provided with a step groove 16, the outer surface of the step groove 16 is provided with a first external thread 17, the center of the inner side surface of the shell 11 and one end close to the connecting pipe 12 is connected with a screw barrel 14, the outer surface of the shell 11 is provided with an external pore group 15, the screw barrel 14 is threadedly connected to the outside of the open end of the inner tube 21, the positions of the external pore group 15 and the limit ring 23 correspond, and the outer surface of the filter cotton 26 is in contact with the inner surface of the shell 11.

[0029] It should be noted that the flange 13 is fitted with the compressor inlet end, and is connected by bolts. The airflow intercepts the debris through the outer air hole group 15 to achieve preliminary filtration, and then the secondary filtration is achieved through the filter element assembly 2, and then the airflow enters the compressor through the connecting pipe 12.

[0030] See also Figure 6 The cover assembly 3 includes a cover 31 , an inner ring surface of the cover 31 is provided with an internal thread 32 , the internal thread 32 and the first external thread 17 are adapted to each other in structure, and the open end of the cover 31 is located inside the stepped groove 16 .

[0031] It should be noted that the cover assembly 3 seals the housing assembly 1 by threading the open end of the cover 31 into the stepped groove 16 .

[0032] The working principle of the utility model is as follows: when in use, the flange 13 is first fitted with the compressor inlet end, and then connected by bolts, and the protrusion 25 is driven to rotate by a tool, so that the open end of the inner tube 21 is installed in the screw barrel 14, and the open end of the cover 31 is threadedly installed in the stepped groove 16, so that the cover assembly 3 closes the housing assembly 1;

[0033] When the compressor is started, the airflow intercepts the debris through the outer pore group 15 to achieve preliminary filtration, and then the airflow passes through the filter cotton 26 to achieve secondary filtration of dust and other impurities, and then enters the inner tube 21 through the inner pore group 22, and then enters the compressor through the connecting pipe 12;

[0034] When the filter element assembly 2 needs to be cleaned or replaced, the cover 31 is rotated to remove it from the open end of the outer shell 11, and then the protrusion 25 is driven to rotate with the help of a tool, so that the open end of the inner tube 21 is disassembled in the screw barrel 14, thereby moving the filter element assembly 2 out of the outer shell 11, and the filter element assembly 2 is then cleaned or replaced.

Claims

1. A compressor pre-filter, characterized in that: It comprises a housing assembly (1), wherein the interior of the housing assembly (1) is threadedly connected to a filter element assembly (2), and one end of the filter element assembly (2) is threadedly connected to a sealing cover assembly (3); The filter element assembly (2) comprises an inner tube (21), the outer surface of the inner tube (21) is provided with an inner pore group (22), the outer surface of the inner tube (21) and located on both sides of the inner pore group (22) are connected with two groups of limit rings (23), the outer surface of the open end of the inner tube (21) is provided with a second outer thread (24), the center of the side surface of the other end of the inner tube (21) is connected with a protrusion (25), and a filter cotton (26) is arranged outside the inner tube (21) and located between the two groups of inner pore groups (22).

2. A compressor pre-filter according to claim 1, characterized in that: The housing assembly (1) comprises a shell (11), one end of the shell (11) is connected to a connecting pipe (12), the free end of the connecting pipe (12) is externally connected to a flange (13), the outer side surface of the open end of the shell (11) is provided with a stepped groove (16), and the outer surface of the stepped groove (16) is provided with a first external thread (17).

3. A compressor pre-filter according to claim 2, characterized in that: A screw barrel (14) is connected to the center of the inner side surface of the outer shell (11) and one end close to the connecting pipe (12), and an outer pore group (15) is provided on the outer surface of the outer shell (11).

4. A compressor pre-filter according to claim 3, characterized in that: The screw barrel (14) is threadedly connected to the outside of the open end of the inner tube (21), the positions of the outer pore group (15) and the limiting ring (23) correspond to each other, and the outer surface of the filter cotton (26) is in contact with the inner surface of the outer shell (11).

5. A compressor pre-filter according to claim 1, characterized in that: The sealing cover assembly (3) comprises a sealing cover (31), and an inner annular surface of the sealing cover (31) is provided with an internal thread (32).

6. A compressor pre-filter according to claim 5, characterized in that: The structures of the internal thread (32) and the first external thread (17) are compatible, and the opening end of the sealing cover (31) is located inside the stepped groove (16).

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