Air inlet filtering and self-cleaning device of centrifugal air compressor

Abstract

The utility model discloses an inlet air filtering and self-cleaning device of a centrifugal air compressor. The inlet air filtering and self-cleaning device comprises a ventilation chamber, a filtering assembly and a backflushing assembly. According to the scheme, transition is formed between the filter element of the centrifugal air compressor and the external environment through the ventilation chamber, the possibility that impurities in the external environment make direct contact with the centrifugal air compressor is reduced, and external airflow firstly enters the ventilation chamber and then flows upwards to pass through the centrifugal air compressor; heavier impurities in external airflow can be screened out in the upward flowing process after entering the ventilation chamber; the filter cloth pressed on the outer wall of the ventilation chamber by the pressing plate can filter outside impurities with small particle sizes, the impurity content of airflow entering the ventilation chamber is reduced, the supporting assembly can support the filter cloth, and the possibility that the filter cloth is jacked into the ventilation chamber when the airflow flows through the filter cloth is reduced; and the back flushing assembly can blow the filter cloth, impurities remaining on the filter cloth are reversely blown out of the ventilation chamber, and the influence on the air inflow of the ventilation chamber after the filter cloth is blocked is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of mine ventilation, in particular to a centrifugal air compressor air inlet filtering self-cleaning device. Background Art

[0002] The air in the environment where coal mine air compressors are used contains impurities such as coal dust and flocs. For mines in the heart of the desert, there is a large amount of wind and sand in the environment, which can easily cause the air inlet filter device of the air compressor to be blocked, and there is a risk of dust entering the inside of the air compressor body. Utility Model Content

[0003] In view of this, the utility model provides a centrifugal air compressor air inlet filter self-cleaning device, which can form a transition between the filter element of the centrifugal air compressor and the external environment through the ventilation chamber, thereby reducing the possibility of impurities in the external environment directly contacting the centrifugal air compressor. The external airflow first enters the ventilation chamber, and then flows upward through the centrifugal air compressor. The heavier impurities in the external airflow can be screened out during the upward flow after entering the ventilation chamber; the filter cloth pressed by the pressure plate on the outer wall of the ventilation chamber can filter impurities with smaller particle sizes from the outside, thereby reducing the impurity content of the airflow entering the ventilation chamber, and the support component can support the filter cloth, thereby reducing the possibility of the filter cloth being pushed into the ventilation chamber when the airflow passes through the filter cloth; the recoil component can spray the filter cloth, that is, clean the filter cloth, and reversely blow the impurities remaining on the filter cloth to the outside of the ventilation chamber, thereby reducing the impact of the filter cloth on the air intake of the ventilation chamber after being blocked.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A centrifugal air compressor air inlet filter self-cleaning device, fixed to the bottom of the centrifugal air compressor, comprising:

[0006] A ventilation chamber, the side wall of which is in communication with the outside for gas exchange, the top wall of the ventilation chamber being lower than the bottom end of the filter element of the centrifugal air compressor, the bottom wall of the ventilation chamber being suspended and having an opening for gravel to pass through;

[0007] A filter assembly, comprising a filter cloth covering the side wall of the ventilation chamber, a pressing plate for fixing the filter cloth on the side wall of the ventilation chamber, and a support assembly for preventing the filter cloth from being recessed into the interior of the ventilation chamber, wherein the support assembly allows airflow inside and outside the ventilation chamber to be exchanged through the filter cloth;

[0008] A backflushing assembly is fixed inside the ventilation chamber and is used to blow the filter cloth toward the outside of the ventilation chamber.

[0009] Preferably, the pressing plate is detachably connected to the ventilation chamber, and a portion of the pressing plate covers the side edge of the filter cloth and presses the side edge of the filter cloth against the outer wall of the ventilation chamber.

[0010] Preferably, the pressure plate has a limiting convex edge on a side facing the ventilation chamber, and the limiting convex edge is in the shape of a single-edged bevel.

[0011] Preferably, the supporting assembly comprises a well-shaped net bag fixed to the outer wall of the ventilation chamber and used to support the filter cloth, and a supporting net frame fixed in the ventilation chamber and used to support the edge of the well-shaped net bag, and the supporting net frame extends toward the center of the filter cloth and forms a passage for people to pass through.

[0012] Preferably, the well-shaped net bag in the channel is detachably connected with a plurality of buckles, and the buckles simultaneously clamp the filter cloth and the supporting net frame.

[0013] Preferably, the recoil assembly extends obliquely toward the filter cloth, and the ventilation chamber shields the recoil assembly in a horizontal direction.

[0014] Preferably, the bottom opening of the ventilation chamber is configured with a reduced diameter.

[0015] Preferably, the recoil assembly has a timer for timed control of the blowing.

[0016] It can be seen from the above technical scheme that the centrifugal air compressor air inlet filter self-cleaning device provided by the utility model forms a transition between the filter element of the centrifugal air compressor and the external environment through the ventilation chamber, thereby reducing the possibility of impurities in the external environment directly contacting the centrifugal air compressor. The external airflow first enters the ventilation chamber, and then flows upward through the centrifugal air compressor. The heavier impurities in the external airflow can be screened out during the upward flow after entering the ventilation chamber; the filter cloth pressed by the pressure plate on the outer wall of the ventilation chamber can filter impurities with smaller particle sizes from the outside, thereby reducing the impurity content of the airflow entering the ventilation chamber, and the support assembly can support the filter cloth, thereby reducing the possibility of the filter cloth being pushed into the ventilation chamber when the airflow passes through the filter cloth; the recoil assembly can spray the filter cloth, that is, clean the filter cloth, and reversely blow the impurities remaining on the filter cloth to the outside of the ventilation chamber, thereby reducing the impact of the filter cloth on the air intake of the ventilation chamber after being blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 is a schematic diagram showing the structure of a centrifugal air compressor air inlet filter self-cleaning device according to an exemplary embodiment;

[0019] Figure 2 is a schematic diagram showing the structure of a centrifugal air compressor air inlet filter self-cleaning device according to another exemplary embodiment;

[0020] Figure 3 is a schematic diagram showing the position of a channel according to an exemplary embodiment;

[0021] Figure 4 According to an exemplary embodiment Figure 3 The middle is an enlarged view of part A showing the structure of the recoil assembly;

[0022] Figure 5 is a schematic diagram showing a pressure plate structure according to an exemplary embodiment.

[0023] Reference numerals:

[0024] 1. Ventilation chamber; 11. Top frame; 111. Upper support plate; 112. Upper support plate; 12. Side frame; 13. Bottom frame; 131. Lower support plate; 132. Lower support plate; 2. Centrifugal air compressor; 3. Filter assembly; 4. Buckle; 5. Support assembly; 51. Support mesh frame; 511. Channel; 52. Well-shaped mesh bag; 6. Filter cloth; 61. Press plate; 62. Limiting convex edge; 7. Recoil assembly; 71. Air duct; 72. Nozzle; 8. Opening. DETAILED DESCRIPTION

[0025] The utility model discloses a centrifugal air compressor air inlet filter self-cleaning device, which can form a transition between the filter element of the centrifugal air compressor and the external environment through a ventilation chamber, thereby reducing the possibility that impurities in the external environment directly contact the centrifugal air compressor. The external airflow first enters the ventilation chamber, and then flows upward through the centrifugal air compressor. Impurities with heavier weight in the external airflow can be screened out during the process of flowing upward after entering the ventilation chamber; the filter cloth pressed by a pressing plate on the outer wall of the ventilation chamber can filter impurities with smaller particle sizes from the outside, thereby reducing the impurity content of the airflow entering the ventilation chamber; the support component can support the filter cloth, thereby reducing the possibility that the filter cloth will be pushed into the ventilation chamber when the airflow passes through the filter cloth; the recoil component can spray the filter cloth, that is, clean the filter cloth, and reversely spray the impurities remaining on the filter cloth to the outside of the ventilation chamber, thereby reducing the influence of the filter cloth on the air intake of the ventilation chamber after being blocked.

[0026] 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.

[0027] In an exemplary embodiment of the present disclosure, a centrifugal air compressor inlet filter self-cleaning device is provided, such as Figure 1 As shown, Figure 1 is a schematic diagram showing the structure of a centrifugal air compressor air inlet filter self-cleaning device according to an exemplary embodiment; Figure 2 is a schematic diagram showing the structure of a centrifugal air compressor air inlet filter self-cleaning device according to another exemplary embodiment; Figure 3 is a schematic diagram showing the position of a channel according to an exemplary embodiment; Figure 4 According to an exemplary embodiment Figure 3 The middle is an enlarged view of part A showing the structure of the recoil assembly; Figure 5 FIG. 1 is a schematic diagram showing a pressure plate structure according to an exemplary embodiment. Figures 1 to 5 Provide explanation.

[0028] Some specific implementation modes described below are intended to facilitate those skilled in the art to understand the present embodiment, and the present embodiment is not limited to some specific implementation modes described below.

[0029] Reference Figure 1 and Figure 2 An exemplary embodiment of the present disclosure provides a centrifugal air compressor air inlet filter self-cleaning device, which is fixed to the bottom of the centrifugal air compressor and includes:

[0030] The ventilation chamber 1 has a side wall connected to the outside for gas exchange, the top wall of the ventilation chamber 1 is lower than the bottom end of the filter element of the centrifugal air compressor 2, and the bottom wall of the ventilation chamber 1 is suspended and has an opening 8 for gravel to pass through;

[0031] The filter assembly 3 includes a filter cloth 6 covering the side wall of the ventilation chamber 1, a pressing plate 61 for fixing the filter cloth 6 on the side wall of the ventilation chamber 1, and a support assembly 5 for preventing the filter cloth 6 from being recessed into the ventilation chamber 1, and the support assembly 5 allows the airflow inside and outside the ventilation chamber 1 to be exchanged through the filter cloth 6;

[0032] The backflushing assembly 7 is fixed inside the ventilation chamber 1 and is used to blow the filter cloth 6 toward the outside of the ventilation chamber 1 .

[0033] For example, refer to Figure 1 and Figure 3The ventilation chamber 1 is in the shape of a cube and is formed by splicing a plurality of angle steels. The ventilation chamber 1 includes four top frames 11 connected end to end to form a rectangular frame, four side frames 12 erected and fixed at the connection points of adjacent top frames 11, and four bottom frames 13 connected end to end to form a rectangular frame. The angle steel-shaped top frame 11 includes a horizontal upper support plate 111 and an upright upper support plate 112. The upper support plate 111 is fixedly connected to the bottom surface of the centrifugal air compressor 2 and supports the centrifugal air compressor 2. The upper support plate 112 is fixed to the top of the side frame 12 and supported by the side frame 12. The area enclosed between the four bottom frames 13 forms the opening 8 of the ventilation chamber 1. The angle-shaped bottom frame 13 includes an upright lower support plate 132 and a lower support plate 131 fixed to the bottom side of the lower support plate 132. The lower support plate 131 extends obliquely toward the middle position of the bottom side of the ventilation chamber 1. The inclined lower support plate 131 reduces the diameter of the bottom opening 8 of the ventilation chamber 1. The side frame 12 extends downward from the top frame 11 and passes through the bottom frame 13. The bottom end of the side frame 12 is used to support on the ground or other supporting bases, so that a ventilation gap is formed between the lower support plate 131 and the ground or other supporting bases. The inclined lower support plate 131 can make the gravel inside the ventilation chamber 1 fall smoothly, and can reduce the possibility that the gravel blown into the ventilation chamber 1 by the wind in the external environment remains in the ventilation chamber 1.

[0034] The support assembly 5, the filter cloth 6 and the pressing plate 61 are respectively arranged on one side of the ventilation chamber 1 formed by two adjacent side frames 12, and cover the side of the ventilation chamber 1. The pressing plate 61 is connected to the ventilation chamber 1 by bolts, and the pressing plate 61 is in the shape of a rectangular frame. By passing the bolts through the outer wall of the pressing plate 61 and the side frame 12 in sequence, and connecting nuts to the threaded tail ends of the bolts extending into the ventilation chamber 1, the pressing plate 61 can be fixed to the outside of the ventilation chamber 1, and the pressing plate 61 is pressed against the outside of the two adjacent side frames 12, the upper support plate 112 and the lower support plate 112, and the filter cloth 6 is pressed between the two side frames 12, the upper support plate 112 and the lower support plate 112 by the pressing plate 61.

[0035] The support assembly 5 includes a well-shaped net bag 52 fixed to the outer wall of the ventilation chamber 1 and used to support the filter cloth 6, and a support net frame 51 fixed in the ventilation chamber 1 and used to support the edge of the well-shaped net bag 52. The support net frame 51 extends toward the center of the filter cloth 6 and forms a passage 511 for people to pass through. The support net frame 51 is a mesh-like structure formed by overlapping a plurality of cross-shaped and relatively fixed steel wires. The holes on the support net frame 51 are diamond-shaped. The top side edge of the support net frame 51 is fixed to the inner wall of the upper support plate 112, the bottom side edge of the support net frame 51 is fixed to the inner wall of the lower support plate 132, and the two side edges of the support net frame 51 are respectively fixed to the inner walls of the two adjacent side frames 12. The passage 511 is rectangular and is opened in the middle of the support frame. The support net frame 51 at the edge of the passage 511 crosses the upper support plate 112 (lower support plate 132, side frame 12) and extends to the area between the two side frames 12. The well-shaped net bag 52 is a mesh-like structure formed by overlapping multiple mutually perpendicular and relatively fixed rope bodies. The holes on the well-shaped net bag 52 are rectangular. The top side of the well-shaped net bag 52 is fixedly connected to the outer wall of the upper support plate 112, the bottom side of the well-shaped net bag 52 is fixedly connected to the outer wall of the lower support plate 112, and the two sides of the well-shaped net bag 52 are respectively fixedly connected to the outer walls of two adjacent side frames 12. When wind blows outside the ventilation chamber 1, the filter cloth 6 is recessed into the ventilation chamber 1, and the well-shaped net bag 52 can provide support for the filter cloth 6, reducing the possibility of the filter cloth 6 being damaged under wind pressure. The support net frame 51 can support the edges of the well-shaped net bag 52 and the filter cloth 6, reducing the possibility of the filter cloth 6 being separated from the pressure plate 61 and the outer wall of the ventilation chamber 1 under wind pressure.

[0036] A plurality of buckles 4 are detachably connected to the well-shaped net bag 52 in the channel 511 . The buckles 4 are located at the edge of the channel 511 . The buckles 4 penetrate the filter cloth 6 and clamp the filter cloth 6 and the supporting net frame 51 .

[0037] Reference Figure 1 and Figure 4 The recoil assembly 7 includes an air duct 71 fixed in the angle region of the angle steel-shaped top frame 11, and a nozzle 72 fixed on the air duct 71 and extending in an inclined posture toward the filter cloth 6. The bottom end of the nozzle 72 is flush with the bottom side of the upper support plate 112, and the upper support plate 112 covers the nozzle 72 in the horizontal direction. A timer for timing control of the air duct 71 to generate airflow and spray the filter cloth 6 through the nozzle 72 is fixedly connected inside the ventilation chamber 1.

[0038] In this embodiment, a transition is formed between the filter element of the centrifugal air compressor 2 and the external environment through the ventilation chamber 1, thereby reducing the possibility of impurities in the external environment directly contacting the centrifugal air compressor 2. The external airflow first enters the ventilation chamber 1, and then flows upward through the centrifugal air compressor 2. The impurities with heavier weight in the external airflow can be screened out during the upward flow after entering the ventilation chamber 1; the filter cloth 6 pressed against the outer wall of the ventilation chamber 1 by the pressure plate 61 can filter out impurities with smaller particle sizes from the outside, thereby reducing the impurity content of the airflow entering the ventilation chamber 1, and the support component 5 can support the filter cloth 6, thereby reducing the possibility of the filter cloth 6 being pushed into the interior of the ventilation chamber 1 when the airflow passes through the filter cloth 6; the recoil component 7 can spray the filter cloth 6, that is, clean the filter cloth 6, and reversely blow the impurities remaining on the filter cloth 6 to the outside of the ventilation chamber 1, thereby reducing the impact of the filter cloth 6 on the air intake of the ventilation chamber 1 after being blocked.

[0039] In an exemplary embodiment of the present disclosure, referring to Figure 2 and Figure 3 The pressing plate 61 has a limiting convex edge 62 on the side facing the ventilation chamber 1, and the limiting convex edge 62 is in the shape of a single-edged inclined surface.

[0040] For example, refer to Figure 2 and Figure 5 The well-shaped net bag 52 is fixedly connected to the outer wall of the ventilation chamber 1, and the edge of the filter cloth 6 is even outside the side wall edge of the well-shaped net bag 52. The edge of the filter cloth 6 pressed by the pressing plate 61 on the outer wall of the ventilation chamber 1 is stepped, that is, the filter cloth 6 covers the edge of the well-shaped net bag 52, and the pressing plate 61 presses the filter cloth 6 outside the edge of the well-shaped net bag 52. The limiting convex edge 62 is integrally formed on the outer wall of the pressing plate 61 facing the filter cloth 6. The limiting convex edge 62 is a ratchet structure, which is used to obtain greater friction with a smaller contact area, reducing the possibility of the filter cloth 6 detaching from the bottom of the pressing plate 61.

[0041] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A centrifugal air compressor air inlet filter self-cleaning device, characterized in that: Fixed to the bottom of the centrifugal air compressor (2), comprising: A ventilation chamber (1) has a side wall connected to the outside for gas exchange, a top wall of the ventilation chamber (1) being lower than the bottom end of the filter element of the centrifugal air compressor (2), and a bottom wall of the ventilation chamber (1) being suspended and having an opening (8) for gravel to pass through; A filter assembly (3) comprising a filter cloth (6) covering a side wall of the ventilation chamber (1), a pressing plate (61) for fixing the filter cloth (6) to the side wall of the ventilation chamber (1), and a support assembly (5) for preventing the filter cloth (6) from being sunken into the interior of the ventilation chamber (1), wherein the support assembly (5) allows airflows inside and outside the ventilation chamber (1) to be exchanged through the filter cloth (6); A recoil assembly (7) is fixed inside the ventilation chamber (1) and is used to blow the filter cloth (6) toward the outside of the ventilation chamber (1).

2. The centrifugal air compressor air inlet filter self-cleaning device according to claim 1, characterized in that: The pressing plate (61) is detachably connected to the ventilation chamber (1), and a portion of the pressing plate (61) covers the side edge of the filter cloth (6) and presses the side edge of the filter cloth (6) against the outer wall of the ventilation chamber (1).

3. The centrifugal air compressor air inlet filter self-cleaning device according to claim 2, characterized in that: The pressing plate (61) has a limiting convex edge (62) on the side facing the ventilation chamber (1), and the limiting convex edge (62) is in the shape of a single-edged inclined surface.

4. The centrifugal air compressor inlet filter self-cleaning device according to claim 1, characterized in that: The support assembly (5) comprises a well-shaped net bag (52) fixed to the outer wall of the ventilation chamber (1) and used to support the filter cloth (6), and a support net frame (51) fixed in the ventilation chamber (1) and used to support the edge of the well-shaped net bag (52), wherein the support net frame (51) extends toward the center of the filter cloth (6) and forms a passage (511) for people to pass through.

5. The centrifugal air compressor air inlet filter self-cleaning device according to claim 4, characterized in that: The well-shaped net bag (52) in the channel (511) is detachably connected to a plurality of buckles (4), and the buckles (4) simultaneously clamp the filter cloth (6) and the supporting net frame (51).

6. The centrifugal air compressor air inlet filter self-cleaning device according to claim 1, characterized in that: The recoil assembly (7) extends obliquely in the direction of the filter cloth (6), and the ventilation chamber (1) shields the recoil assembly (7) in the horizontal direction.

7. The centrifugal air compressor air inlet filter self-cleaning device according to claim 1, characterized in that: The bottom opening (8) of the ventilation chamber (1) is configured with a reduced diameter.

8. The centrifugal air compressor inlet filter self-cleaning device according to claim 1, characterized in that: The recoil assembly (7) has a timer for timing control of the blowing.

Images