Variable load compressor air inlet valve

Abstract

The variable load compressor air inlet valve comprises a lower valve body, the lower end of the lower valve body is provided with an opening, an upper valve body is fixed to the upper surface of the lower valve body, the lower end of the upper valve body is provided with an opening, and the lower port of the upper valve body extends to the inner side of the lower valve body. Air inlet holes which are evenly distributed are formed in the positions, close to the upper end, of the outer side of the upper valve body. When the compressor pumps air, the inner side of the lower valve body is in a negative pressure state, at the moment, air enters the upper valve body, and the valve plate is ejected to be opened, so that air inflow is achieved; air pressure in the air storage tank rises continuously and enters the air cylinder body through the air inlet pipe to drive the piston to overcome the elastic force of the spring and move downwards continuously, so that the limiting rod moves downwards continuously until the limiting rod abuts against the valve plate, and the valve plate blocks the lower end opening of the upper valve body, so that air cannot enter the air cylinder body; therefore, the compressor can be effectively prevented from excessively pumping air into the air storage tank, and overload protection of the air storage tank is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, in particular to an air intake valve for a variable load compressor. Background Art

[0002] Air compressors are widely used as a type of compressor. They compress air into high-pressure gas and store it in a gas tank, thereby providing air pressure power for some production and equipment drives.

[0003] When the air compressor is compressing air, it controls the incoming gas through the intake valve, so as to ensure the stable operation of the air compressor. The intake valve plays an important role in the operation of the air compressor.

[0004] The intake valve of the existing air compressor controls the intake by controlling the movement of the valve core through a spring. However, the intake valve cannot be adjusted according to the pressure of the air stored in the air tank, which easily causes the air tank to overload. Utility Model Content

[0005] In order to solve the problem that the intake valve of the existing air compressor cannot adjust the air intake according to the pressure of the air stored in the air tank during air intake control, the present application provides a variable load compressor intake valve, which adopts the following technical solution:

[0006] A variable load compressor intake valve comprises a lower valve body, the lower end of the lower valve body is opened, and an upper valve body is fixed to the upper surface of the lower valve body, the lower end of the upper valve body is opened, and the lower port of the upper valve body extends to the inner side of the lower valve body, and the outer side of the upper valve body is provided with evenly arranged intake holes near the upper end. A valve plate that can swing up and down is rotatably installed on the inner side of the lower valve body, and the left side of the valve plate can block the lower port of the upper valve body, a cylinder body is fixed to the upper surface of the lower valve body near the right side, and an intake pipe is fixed to the right side of the cylinder body near the upper end, a piston is provided on the inner side of the cylinder body, and a limiting rod is fixed to the lower side of the piston, a spring is installed on the outer side of the limiting rod, and the lower end of the limiting rod extends to the inner side of the lower valve body and limits the distance when the right side of the valve plate swings upward.

[0007] Optionally, a rotating shaft is fixed to the upper side of the valve plate, and the front and rear ends of the rotating shaft are rotatably mounted on the front and rear side walls of the lower valve body respectively.

[0008] Optionally, a threaded head is fixed to the upper end of the limiting rod, and a rubber ball head is fixed to the lower end of the limiting rod.

[0009] Optionally, the lower end of the cylinder body is opened, and a mounting edge is fixed to the edge of the lower port of the cylinder body, a sealing ring is provided between the mounting edge and the upper surface of the lower valve body, and the mounting edge is fixed to the lower valve body by fixing screws.

[0010] Optionally, a plurality of rubber rings are sleeved on the outer side of the piston, and a threaded hole is opened in the center of the lower surface of the piston.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] When the compressor is pumping air, the inner side of the lower valve body is in a negative pressure state. At this time, the upper valve body takes in air and pushes the valve plate to open to achieve air intake. When the compressor continuously pumps air into the air storage tank, the air pressure in the air storage tank continuously increases and enters the cylinder body through the intake pipe, driving the piston to overcome the elastic force of the spring and continuously move downward, thereby causing the limit rod to continuously move downward until it is tightly pressed against the valve plate, so that the valve plate blocks the lower port of the upper valve body and cannot take in air, thereby effectively preventing the compressor from over-pumping air into the air storage tank and achieving overload protection for the air storage tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0014] Figure 1 This is a cross-sectional view of an intake valve of a variable load compressor of the present utility model;

[0015] Figure 2 This is a schematic diagram of a valve plate of a variable load compressor intake valve shown in the present utility model;

[0016] Figure 3 This is a schematic diagram of a limit rod of an intake valve of a variable load compressor shown in the present utility model;

[0017] Figure 4 This is a schematic diagram of a cylinder body of a variable load compressor intake valve shown in the present utility model;

[0018] Figure 5 It is a schematic diagram of a piston of an intake valve of a variable load compressor shown in the present utility model.

[0019] In the figure: 1. Lower valve body; 2. Valve plate; 21. Rotating shaft; 3. Upper valve body; 4. Air inlet hole; 5. Cylinder body; 51. Fixing screw; 52. Sealing ring; 53. Mounting edge; 6. Air inlet pipe; 7. Piston; 71. Threaded hole; 72. Rubber ring; 8. Spring; 9. Limit rod; 91. Rubber ball head; 92. Threaded head. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the utility model for which protection is claimed, but merely represents selected embodiments of the present invention.

[0021] Please refer to the Figure 1 As shown, a variable load compressor intake valve comprises a lower valve body 1, the lower end of the lower valve body 1 is opened, and an upper valve body 3 is fixed to the upper surface of the lower valve body 1, the lower end of the upper valve body 3 is opened, and the lower port of the upper valve body 3 extends to the inner side of the lower valve body 1, and the outer side of the upper valve body 3 is provided with evenly arranged air intake holes 4 near the upper end. A valve plate 2 that can swing up and down is rotatably installed on the inner side of the lower valve body 1, and the left side of the valve plate 2 can block the lower port of the upper valve body 3, a cylinder body 5 is fixed to the upper surface of the lower valve body 1 near the right side, and an air intake pipe 6 is fixed to the right side of the cylinder body 5 near the upper end, a piston 7 is provided on the inner side of the cylinder body 5, and a limiting rod 9 is fixed to the lower side of the piston 7, a spring 8 is sleeved on the outer side of the limiting rod 9, and the lower end of the limiting rod 9 extends to the inner side of the lower valve body 1 and limits the valve plate 2 When the air pressure in the air tank reaches the highest value, the driving piston 7 drives the limiting rod 9 to press against the right side of the valve plate 2, thereby blocking the lower port of the upper valve body 3 of the valve plate 2, making it impossible to intake air, thereby realizing overload protection of the air tank.

[0022] Please refer to the Figure 2 As shown, a rotating shaft 21 is fixed on the upper side of the valve plate 2, and the front and rear ends of the rotating shaft 21 are rotatably mounted on the front and rear side walls of the lower valve body 1 respectively. The valve plate 2 is rotatably mounted on the inner side of the lower valve body 1 through the rotating shaft 21, thereby realizing up and down swinging.

[0023] Please refer to the Figure 3 As shown, a threaded head 92 is fixed to the upper end of the limiting rod 9 for fixed connection with the piston 7 , and a rubber ball head 91 is fixed to the lower end of the limiting rod 9 for shock absorption and buffering when in contact with the valve plate 2 .

[0024] Please refer to the Figure 4 As shown, the lower end of the cylinder body 5 is opened, and a mounting edge 53 is fixed to the edge of the lower port of the cylinder body 5, a sealing ring 52 is provided between the mounting edge 53 and the upper surface of the lower valve body 1, and the mounting edge 53 is fixed to the lower valve body 1 by a fixing screw 51, and the mounting edge 53 is fixed to the lower valve body 1 and sealed by the sealing ring 52.

[0025] Please refer to the Figure 5 As shown, a plurality of rubber rings 72 are sleeved on the outer side of the piston 7. The piston 7 is sealed with the inner wall of the cylinder body 5 through the rubber rings 72. A threaded hole 71 is provided in the center of the lower surface of the piston 7 for installing the limiting rod 9.

[0026] Working principle: when the compressor is pumping air, the inner side of the lower valve body 1 is in a negative pressure state. At this time, the upper valve body 3 takes in air and pushes the left side of the valve plate 2 downward to open it, so that the air in the upper valve body 3 enters the lower valve body 1, thereby realizing air intake. When the compressor continuously pumps air into the air tank, the air pressure in the air tank increases and enters the cylinder body 5 through the intake pipe 6, driving the piston 7 to overcome the elastic force of the spring 8 and move downward, thereby causing the limit rod 9 to move downward. The downward movement of the limit rod 9 limits the right side of the valve plate 2 when it swings upward, thereby reducing the opening degree of the valve plate 2 to the lower port of the upper valve body 3. When the air pressure in the air tank reaches the highest value, the driving piston 7 drives the limit rod 9 to press against the right side of the valve plate 2, thereby causing the valve plate 2 to block the lower port of the upper valve body 3, making it impossible to intake air, thereby completing the overload protection of the air tank.

[0027] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A variable load compressor intake valve, comprising a lower valve body (1), characterized in that: The lower end of the lower valve body (1) is provided with an opening, and an upper valve body (3) is fixed on the upper surface of the lower valve body (1), the lower end of the upper valve body (3) is provided with an opening, and the lower end of the upper valve body (3) extends to the inner side of the lower valve body (1), and the outer side of the upper valve body (3) is provided with air inlet holes (4) arranged evenly near the upper end, and a valve plate (2) that can swing up and down is rotatably installed on the inner side of the lower valve body (1), and the left side of the valve plate (2) can face the lower end of the upper valve body (3). For sealing, a cylinder body (5) is fixed on the upper surface of the lower valve body (1) near the right side, and an air intake pipe (6) is fixed on the right side of the cylinder body (5) near the upper end, a piston (7) is provided on the inner side of the cylinder body (5), and a limiting rod (9) is fixed on the lower side of the piston (7), a spring (8) is sleeved on the outer side of the limiting rod (9), and the lower end of the limiting rod (9) extends to the inner side of the lower valve body (1) and limits the distance when the right side of the valve plate (2) swings upward.

2. A variable load compressor intake valve according to claim 1, characterized in that: A rotating shaft (21) is fixed on the upper side of the valve plate (2), and the front and rear ends of the rotating shaft (21) are rotatably mounted on the front and rear side walls of the lower valve body (1) respectively.

3. A variable load compressor intake valve according to claim 2, characterized in that: A threaded head (92) is fixed to the upper end of the limiting rod (9), and a rubber ball head (91) is fixed to the lower end of the limiting rod (9).

4. A variable load compressor intake valve according to claim 3, characterized in that: The lower end of the cylinder body (5) is open, and a mounting edge (53) is fixed to the edge of the lower end of the cylinder body (5). A sealing ring (52) is provided between the mounting edge (53) and the upper surface of the lower valve body (1), and the mounting edge (53) is fixed to the lower valve body (1) by a fixing screw (51).

5. The variable load compressor intake valve according to claim 4, characterized in that: A plurality of rubber rings (72) are sleeved on the outer side of the piston (7), and a threaded hole (71) is provided at the center of the lower surface of the piston (7).

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