An integrated variable frequency screw air compressor intake valve

Abstract

The present invention relates to an air compressor component, and in particular to an integrated variable frequency screw air compressor air intake valve, which solves the problem of using the air intake valve. The air intake valve comprises an outer valve body, a fixed valve body, a check valve rod, a piston and a sealing top, wherein an adjusting chamber is arranged in the outer valve body, an installation chamber is arranged at the lower part of the outer valve body for sequentially installing the sealing top, the piston and the fixed valve body, an exhaust port is arranged on the upper outer wall of the outer valve body, the exhaust port, the adjusting chamber and the installation chamber are sequentially connected, the check valve rod is arranged in the adjusting chamber, and the exhaust port and the adjusting chamber are separated by the movable shielding of the check valve rod, an active chamber is formed between the sealing top and the fixed valve body, the piston is arranged in the active chamber for sliding cooperation, one end of the piston extends out of the active chamber and abuts against the check valve rod, the integrated design and compact structure, the air intake and the air discharge are both in the valve body, the waste of materials is avoided, the cost is saved, and the use is stable and reliable, and the maintenance is convenient.

Description

Technical Field

[0001] The invention relates to an air compressor component, in particular to an air intake valve for an integrated variable frequency screw air compressor. Background Art

[0002] The air compressor intake valve can also be said to be an intake control combination valve, which has the functions of intake control, loading and unloading control, capacity adjustment control, unloading, and preventing oil injection during unloading or shutdown. The intake valve has two pipes, one for venting and the other for releasing the remaining air in the valve to ensure the normal loading of the compressor. When unloading, the current is too large, indicating that the tank pressure is high and the intake valve opening is too large. Please adjust the vent screw to ensure that the tank pressure is not too high.

[0003] The existing variable frequency screw air compressor intake valves all use externally installed exhaust valve bodies. The split structure is prone to sealing problems in actual use, and it also uses more materials, is costly, and is inconvenient to maintain. There is a lack of an integrated, stable, and convenient product. Summary of the invention

[0004] In view of the deficiencies in the existing technology, the present invention provides an integrated variable frequency screw air compressor intake valve.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: an integrated variable frequency screw air compressor intake valve, including an outer valve body, a fixed valve body, a check valve stem, a piston and a sealing top, the fixed valve body is a ventilated hollow structure, an air passage for gas circulation is formed between the fixed valve body and the outer valve body, the air passage is closed or passed through the movement of the sealing top, an adjusting chamber is provided in the outer valve body, an installation chamber is provided at the lower part of the outer valve body for sequential installation of the sealing top, the piston and the fixed valve body, and an exhaust inlet is provided on the upper outer wall of the outer valve body The exhaust inlet, the regulating chamber and the installation chamber are connected in sequence, the check valve rod is arranged in the regulating chamber and moves back and forth in a straight line, and the exhaust inlet and the regulating chamber are blocked and separated by the movement of the check valve rod, the sealing top and the fixed valve body are sleeved, and an active chamber is formed between the sealing top and the fixed valve body, the piston is arranged in the active chamber for sliding cooperation, one end of the piston extends out of the active chamber and abuts against the check valve rod, a flange is provided on the piston, a reset spring is provided between the flange and the sealing top, and a check spring is provided between the flange and the fixed valve body.

[0006] Preferably, the regulating chamber is provided with a plug and a first inner retaining ring at one end where the check valve stem is installed, and a part of the bottom of the installation chamber is a ventilated hollow structure.

[0007] Preferably, a bucket-shaped opening is provided at the lower portion of the regulating chamber, the exhaust inlet is perpendicular to the axis of the regulating chamber, and the check valve stem has a sealing portion that fits and seals with the bucket-shaped opening of the regulating chamber.

[0008] Preferably, a sealing ring is provided at the sealing portion.

[0009] Preferably, the bottom of the installation cavity is in a stepped structure, and the upper portion of the sealing top is in contact with the installation cavity.

[0010] Preferably, the movable cavity is provided with a second inner retaining ring on the inner wall at the sealing top, and the outer valve body is provided with a third inner retaining ring on the wall of the mounting cavity for limiting the movement of the fixed valve body.

[0011] Preferably, the radial projection of the sealing top is in a T-shape.

[0012] Preferably, the projection of the fixed valve body along the radial direction is a T-shape.

[0013] Preferably, the movable chamber is provided with a limiting portion on the inner wall of the fixed valve body, the limiting portion is a step-shaped structure, and one end of the check spring abuts against the limiting portion for limiting.

[0014] Beneficial effects of the present invention: The air intake valve for an integrated variable frequency screw air compressor provided by the present invention has an integrated design and a compact structure. The air intake and air discharge are both inside the valve body, thus avoiding waste of materials and saving costs. In addition, the valve is stable and reliable in use and convenient for maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the cross-sectional structure of the present invention;

[0016] Figure 2 It is a schematic diagram of the three-dimensional combined structure of the present invention;

[0017] Figure 3 It is a schematic diagram of the three-dimensional decomposition structure of the present invention. DETAILED DESCRIPTION

[0018] like Figure 1-Figure 3As shown, an integrated variable frequency screw air compressor intake valve comprises an outer valve body 1, a fixed valve body 2, a check valve rod 3, a piston 4 and a sealing top 5. The fixed valve body is a ventilated hollow structure. An air passage for gas circulation is formed between the fixed valve body 2 and the outer valve body 1. The air passage is closed or passed through by the movement of the sealing top 5. An adjusting chamber 6 is provided in the outer valve body 1. An installation chamber 7 is provided at the lower part of the outer valve body 1 for sequentially installing the sealing top 5, the piston 4 and the fixed valve body 2. An exhaust inlet 8 is provided on the upper outer wall of the outer valve body 1. The exhaust inlet 8, The regulating chamber 6 is connected with the installation chamber 7 in sequence. The check valve stem 3 is arranged in the regulating chamber 6, and the exhaust inlet 8 is blocked and separated from the regulating chamber 6 by the movable shielding of the check valve stem 3. The sealing top 5 is sleeved with the fixed valve body 2, and a movable chamber is formed between the sealing top 5 and the fixed valve body 2. The piston 4 is arranged in the movable chamber for sliding cooperation. One end of the piston 4 extends out of the movable chamber and abuts against the check valve stem 3. A flange 9 is provided on the piston 4. A reset spring 10 is provided between the flange 9 and the sealing top 5, and a check spring 11 is provided between the flange 9 and the fixed valve body 2. The exhaust inlet 8 is connected to the oil and gas barrel for venting, wherein the oil and gas barrel is external. The sealing top 5 cooperates with the fixed valve body 2 to seal and install the piston 4, and cooperates with the check valve stem 3.

[0019] The regulating chamber 6 is provided with a plug 12 and a first inner snap ring 13 at one end where the check valve stem 3 is installed to prevent leakage and limit the position. The bottom of the installation chamber 7 is partially a ventilated hollow structure with a limited range, which is convenient for sealing when the sealing top 5 is pressed against it, that is, closing the intake valve.

[0020] The lower part of the regulating chamber 6 is provided with a bucket-shaped opening 14, the exhaust inlet 8 is perpendicular to the axis of the regulating chamber 6, and the check valve stem 3 has a sealing portion 15 that fits and seals with the bucket-shaped opening 14 of the regulating chamber 6. The bucket shape is conducive to reducing the flow rate for easy control, and reducing the gap when axially fitting.

[0021] The sealing portion 15 is provided with a sealing ring 16 to enhance the sealing performance.

[0022] The bottom of the installation cavity 7 is a step-shaped structure, and the upper part of the sealing top 5 is in contact with the installation cavity 7. The diameter of the sealing top 5 is larger than the diameter of the second step at the bottom of the installation cavity 7. Compared with the socket-type structure, this structure is more conducive to smooth up and down movement and ventilation, and can bend the air flow path 90 degrees when sealing is required to reduce leakage, playing a similar role as a labyrinth seal. In addition, a sealing ring is also provided on the upper part of the sealing top 5, and the sealing ring is not easy to be damaged after long-term use.

[0023] The movable cavity is provided with a second inner snap ring 17 on the inner wall at the sealing top 5, and the outer valve body 1 is provided with a third inner snap ring 18 on the hole wall of the installation cavity 7 to limit the movement of the fixed valve body 2. Similarly, it plays a role of limiting and fixing.

[0024] The radial projection of the sealing top 5 is in a T-shape, and the radial projection of the fixed valve body 2 is in a T-shape, which is convenient for production and sleeve fitting.

[0025] The movable chamber is provided with a limit portion 19 on the inner wall of the fixed valve body 2. The limit portion 19 is a step-shaped structure, and one end of the check spring 11 abuts against the limit portion 19 for limit. When assembling, the sealing top 5, the return spring 10 and the piston 4 are sleeved together, and then they and the check spring 11 are installed in the fixed valve body 2. The structure is stable and the design is ingenious, without being too complicated, and it is convenient for assembly and maintenance.

[0026] Principle: When the air compressor is started, stopped and unloaded, the discharge solenoid valve supplies air to the piston 4 through the air inlet. Due to the air pressure, the piston 4 and the sealing top 5 move downward, and the check valve stem 3 moves downward to close the exhaust access port 8; when the pressure of the air compressor is fully loaded and reaches the set pressure upper limit, the discharge solenoid valve loses power and starts to discharge, and the lower end reset spring 10 pushes the piston 4 and the check valve stem 3 to move upward, the exhaust access port 8 is vented, and the intake valve is closed. The relative longitudinal ventilation of the intake valve is achieved through a through or hollow structure, and the opening and closing of the intake valve is achieved by the movement of the sealing top 5. On the whole, the air flow of the intake valve is similar to that of the traditional structure, and there are many styles. In order to better protect this application, no excessive elaboration and limitation are made here.

[0027] Beneficial effects of the present invention: The air intake valve for an integrated variable frequency screw air compressor provided by the present invention has an integrated design and a compact structure. The air intake and air discharge are both inside the valve body, thus avoiding waste of materials and saving costs. In addition, the valve is stable and reliable in use and convenient for maintenance.

[0028] In the description of the present invention, it should be noted that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. At the same time, the basic principles, main features and advantages of the present invention are shown and described above, which should be understood by technicians in this industry.

Claims

1. An air intake valve for an integrated variable frequency screw air compressor, characterized in that: The closure of the valve body is a hollow structure for ventilation, an air passage for gas circulation is formed between the fixed valve body and the outer valve body, and the air passage is closed or opened by the movement of the sealing top. An adjusting chamber is arranged in the outer valve body, and an installation chamber is arranged at the lower part of the outer valve body for sequentially installing the sealing top, the piston and the fixed valve body. An exhaust port is arranged on the outer wall of the upper part of the outer valve body, and the exhaust port, the adjusting chamber and the installation chamber are sequentially connected. The check valve rod is arranged in the adjusting chamber for linear reciprocating movement, and the exhaust port and the adjusting chamber are blocked and separated by the movement of the check valve rod. The sealing top and the fixed valve body are sleeved, and an active chamber is formed between the sealing top and the fixed valve body. The piston is arranged in the active chamber for sliding cooperation, and one end of the piston extends out of the active chamber and abuts against the check valve rod. A flange is arranged on the piston, and a reset spring is arranged between the flange and the sealing top, and a check spring is arranged between the flange and the fixed valve body. The movable cavity is provided with a limiting portion on the inner wall of the fixed valve body, and the limiting portion is a step-shaped structure. One end of the check spring abuts against the limiting portion for limiting position; the bottom of the installation cavity is a step-shaped structure, and the upper part of the sealing top abuts against the installation cavity; the movable cavity is provided with a second inner retaining ring on the inner wall at the sealing top, and the outer valve body is provided with a third inner retaining ring on the wall of the installation cavity hole for limiting the movement of the fixed valve body.

2. The integrated variable frequency screw air compressor air intake valve according to claim 1, characterized in that: The regulating cavity is provided with a plug and a first inner clamping ring at one end where the check valve stem is installed, and a part of the bottom of the installation cavity is a ventilated hollow structure.

3. An integrated variable frequency screw air compressor air intake valve as claimed in claim 1 or 2, characterized in that: A bucket-shaped opening is provided at the lower part of the regulating chamber, the exhaust inlet is perpendicular to the axis of the regulating chamber, and the check valve stem has a sealing portion which is in close contact with the bucket-shaped opening of the regulating chamber.

4. The integrated variable frequency screw air compressor air intake valve according to claim 3, characterized in that: A sealing ring is provided at the sealing portion.

5. The integrated variable frequency screw air compressor air intake valve according to claim 4, characterized in that: The radial projection of the sealing top is in a T-shape.

6. The integrated variable frequency screw air compressor air intake valve according to claim 1, characterized in that: The projection of the fixed valve body along the radial direction is in a T-shape.

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