Valve plate exhaust noise reduction structure

Abstract

The utility model provides a valve plate exhaust noise reduction structure, and belongs to the technical field of air compressors. The valve plate assembly solves the problem that an air outlet tongue on an existing valve plate assembly can generate large noise when exhausting air. The valve plate exhaust noise reduction structure is arranged at an exhaust hole of a valve plate and comprises a long-sheet-shaped elastic valve sheet, the valve sheet can shield a port of the exhaust hole, the valve plate exhaust noise reduction structure further comprises a connecting piece and a limiting piece, a protruding annular boss is arranged on the side, facing the valve sheet, of the valve plate and surrounds the exhaust hole, and the limiting piece is arranged on the valve plate. The limiting piece is arranged on the valve plate, the boss is arranged on the limiting piece, the valve block is arranged between the limiting piece and the boss, the connecting piece sequentially penetrates through the limiting piece and the valve block and enables the limiting piece and the valve plate to be fixed, the side, facing the valve block, of the limiting piece is provided with an arc-shaped limiting face, and the valve block can abut against the limiting face when swinging in the direction away from the valve plate. The exhaust and noise reduction structure of the valve plate has the advantage of low noise.

Description

TECHNICAL FIELD

[0001] The utility model belongs to air compressor technical field relates to a noise reduction structure especially, a valve plate exhaust noise reduction structure. BACKGROUND

[0002] The compressor is also known as air compressor, which is a device for converting mechanical energy into gas pressure and is widely used in chemical industry, machinery, medical treatment, textile, electric power, automobile and military industry. Among them, the piston air compressor is the most widely used air compressor. The piston air compressor mainly includes crankshaft, piston, pressure plate and valve plate. The pressure plate is fixed at the end of the piston and is driven by the crankshaft to rotate and reciprocate to compress the air between the pressure plate and the valve plate. The valve plate is an important part for connecting the piston cylinder and the outside. The valve plate has an air inlet hole and an air outlet hole. The valve plate is generally fixed with a flexible valve piece on the bottom surface. When the cylinder inhales air, the valve piece can block the air outlet hole. When the air is exhausted, the internal gas can push the valve piece to be removed to the outside of the cylinder.

[0003] For example, the applicant designed an air compressor valve plate assembly and applied for a Chinese patent with the application number 202120283085.4 and the publication number CN214698252U. The air compressor valve plate assembly includes a valve plate, an air inlet hole and an air outlet hole, a valve cover, an air inlet connection hole connected to the air inlet hole, an air outlet connection hole connected to the air outlet hole, a rubber valve piece between the valve plate and the valve cover, an air inlet tongue between the air inlet hole and the air inlet connection hole, and an air outlet tongue between the air outlet hole and the air outlet connection hole.

[0004] However, when the air compressor valve plate assembly exhausts, the air outlet tongue will be directly opened by a large amount of air flow and will reciprocate under the impact of the air flow. Not only is the service life of the air outlet tongue reduced due to frequent swinging, but also a large amount of noise is generated during the swinging of the air outlet tongue. Utility model content

[0005] The utility model aims at the above-mentioned problems existing in the prior art and provides a valve plate exhaust noise reduction structure to solve the problem that the air outlet tongue of the existing valve plate assembly generates a large amount of noise during exhaust.

[0006] The utility model can be realized by the following technical schemes:

[0007] The valve plate exhaust noise reduction structure is provided at the exhaust hole of the valve plate and includes a long and elastic valve sheet which can block the port of the exhaust hole, characterized in that the valve plate exhaust noise reduction structure further includes a connecting piece and a limiting piece, the side of the valve plate facing the valve sheet is provided with a convex ring-shaped boss around the exhaust hole, the valve sheet is arranged between the limiting piece and the boss, the connecting piece passes through the limiting piece and the valve sheet in sequence and fixes the limiting piece and the valve plate, the side of the limiting piece facing the valve sheet is provided with an arc-shaped limiting surface, and the valve sheet can abut against the limiting surface when swinging away from the valve plate.

[0008] The valve plate exhaust noise reduction structure can be arranged on the existing valve plate as described in the background and correspond to the position of the exhaust hole on the valve plate. The limiting piece is fixed on the valve plate by the connecting piece and does not move, while the valve sheet which is also passed through by the connecting piece can be close to or away from the exhaust hole under the action of the airflow due to its elasticity. In operation, the valve sheet is tightly attached to the valve plate and blocks the port of the exhaust hole when the cylinder of the air compressor is in the intake state, so that the exhaust hole is closed. When the cylinder is in the exhaust state, the gas in the cylinder can push the valve sheet away to be discharged to the outside of the cylinder. When the valve sheet is pushed away, it swings around the connecting piece to the limiting piece until it abuts against the limiting surface, and under the action of the continuous exhaust airflow, the valve sheet and the limiting surface remain in the abutting state, so that the valve sheet does not swing back and forth, which ensures the service life and greatly reduces the noise generated when the valve sheet is pushed away. The arc-shaped limiting surface can better fit the shape of the valve sheet when it swings, which is more conducive to the fitting of the valve sheet when it swings, further reducing and lowering the noise.

[0009] In the valve plate exhaust noise reduction structure, the limiting piece is in the shape of a long strip and is fixed to the valve plate by one end of the connecting piece and is bent away from the valve plate to form the limiting surface. The entire limiting piece is bent to form the arc-shaped limiting surface, which is convenient for processing.

[0010] In the valve plate exhaust noise reduction structure, the end surface of the boss facing the valve sheet is a flat surface, and the valve sheet can abut against the end surface of the boss, and the connecting piece is arranged at the boss. The boss is used for the valve sheet to abut against and the limiting piece to be fixed, which not only facilitates processing and assembly, but also reduces the influence of the airflow on the valve sheet during exhaust.

[0011] In the valve plate exhaust noise reduction structure, the side of the valve plate facing the valve sheet is provided with a recess in the shape of a long strip, the recess is located between the exhaust hole and the connecting piece, and the valve sheet can abut against the slot of the recess. The recess is arranged to ensure that the position of the valve sheet which is not used to block the exhaust hole is not completely attached to the valve plate, so that the valve sheet can swing freely relative to the valve plate.

[0012] Compared with the prior art, the valve plate exhaust noise reduction structure has the following advantages:

[0013] 1. When the valve plate is pushed open, the valve plate can swing around the through point of the connector towards the limiting member until it abuts against the limiting surface. Under the action of continuous exhaust airflow, the two remain in abutting state, and the valve plate will not swing back and forth, which ensures the service life and greatly reduces the noise generated after the valve plate is pushed open.

[0014] 2. The arc-shaped limiting surface can better fit the shape of the valve plate when it swings, which is more conducive to the fit of the valve plate when it swings, and further reduces and lowers the noise. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure when the exhaust noise reduction structure of this valve plate is installed on the valve plate.

[0016] Figure 2 This is a cross-sectional view of the valve plate exhaust noise reduction structure when it is installed on the valve plate.

[0017] In the figure, 1 is the valve plate; 11 is the exhaust port; 12 is the boss; 13 is the groove; 2 is the valve piece; 3 is the connector; 4 is the limiting component; and 41 is the limiting surface. Detailed Implementation

[0018] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0019] like Figure 1 and Figure 2 As shown, this valve plate exhaust noise reduction structure is installed on an existing plate-shaped valve plate 1, particularly corresponding to the exhaust hole 11 on the valve plate 1. It includes a connector 3, a long plate-shaped limiting member 4 made of metal, and a long sheet-shaped valve plate 2 made of rubber. The valve plate 2 is positioned between the limiting member 4 and the valve plate 1, and the vertical projection of the limiting member 4 on the valve plate 1 completely covers the vertical projection of the valve plate 2 on the valve plate 1. One end of the valve plate 2 can block the port of the exhaust hole 11. The connector 3 passes through the limiting member 4 and the other end of the valve plate 2 in sequence to fix the limiting member 4 to the valve plate 1. In this embodiment, the connector 3 is a screw, which is threaded to the valve plate 1. The head of the screw causes one end of the limiting member 4 to press the valve plate 2 tightly against the valve plate 1, and the other end of the limiting member 4 bends away from the valve plate 1 to form an arc-shaped limiting surface 41 protruding towards the valve plate 2 on the side facing the valve plate 2.

[0020] The side of the valve plate 1 facing the valve sheet 2 has a convex ring-shaped boss 12 around the exhaust hole 11, the cross section of the boss 12 is substantially rectangular, and the area of the rectangle is greater than the vertical projection of the limiting piece 4 on the valve plate 1 and the vertical projection of the valve sheet 2 on the valve plate 1, the end face of the boss 12 facing the valve sheet 2 is a plane, and the valve sheet 2 can be attached to the end face of the boss 12, and the connecting piece 3 passes through the boss 12. In addition, the side of the valve plate 1 facing the valve sheet 2 is provided with a concave long strip-shaped groove 13, which is a straight groove and the slot is located on the end face of the boss 12 facing the valve sheet 2, the groove 13 is located between the exhaust hole 11 and the position where the connecting piece 3 passes through, and the length direction of the groove 13 is perpendicular to the length direction of the valve sheet 2, the length of the groove 13 is consistent with the width of the valve sheet 2, and the valve sheet 2 can be attached to the slot of the groove 13.

[0021] The limiting piece 4 in the valve plate exhaust noise reduction structure is fixed on the valve plate 1 by the connecting piece 3 and does not move, and the valve sheet 2 also passes through the connecting piece 3, which has elasticity by itself and is attached to the port of the exhaust hole 11 in the default state, and can be close to or away from the exhaust hole 11 under the action of the airflow.

[0022] When working, the valve sheet 2 is tightly attached to the boss 12 of the valve plate 1 and blocks the port of the exhaust hole 11 when the cylinder of the air compressor is inhaling, so that it is closed; when exhausting, the gas in the cylinder can push the valve sheet 2 away and exhaust to the outside of the cylinder. When the valve sheet 2 is pushed away, it swings around the position where the connecting piece 3 passes through to the limiting piece 4 until it abuts against the limiting surface 41, and under the action of the continuous exhaust airflow, the valve sheet 2 and the limiting surface 41 remain in abutting state, and the valve sheet 2 will not swing back and forth, which ensures the service life and greatly reduces the noise generated after the valve sheet 2 is pushed away.

[0023] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.

Claims

1. A valve plate exhaust noise reduction structure provided at an exhaust hole (11) of a valve plate (1), comprising an elastic valve sheet (2) in a long sheet shape capable of blocking a port of the exhaust hole (11), characterized in that, The valve plate exhaust noise reduction structure further comprises a connecting piece (3) and a limiting piece (4), one side of the valve plate (1) towards the valve piece (2) has a boss (12) protruding in a ring shape around the exhaust hole (11), the valve piece (2) is arranged between the limiting piece (4) and the boss (12), the connecting piece (3) passes through the limiting piece (4) and the valve piece (2) in sequence and fixes the limiting piece (4) and the valve plate (1), one side of the limiting piece (4) towards the valve piece (2) has an arc-shaped limiting surface (41), when the valve piece (2) swings away from the valve plate (1), it can abut against the limiting surface (41).

2. The valve plate exhaust noise reduction structure of claim 1, wherein, The limiting piece (4) is in a long strip plate shape, one end thereof is fixed with the valve plate (1) through the connecting piece (3), and the other end is bent away from the valve plate (1) to form the limiting surface (41).

3. The valve plate exhaust noise reduction structure according to claim 1 or 2, characterized by, An end face of one end of the boss (12) towards the valve piece (2) is a plane, and the valve piece (2) can abut against the end face of one end of the boss (12), and the connecting piece (3) is arranged at the boss (12).

4. The valve plate exhaust noise reduction structure of claim 3, wherein, One side of the valve plate (1) towards the valve piece (2) is provided with a recess (13) recessed in a long strip shape, the recess (13) is located between the exhaust hole (11) and the connecting piece (3), and the valve piece (2) can abut against a slot opening of the recess (13).

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