CN212251327U

CN212251327U - Air inlet valve for integrated variable-frequency screw air compressor

Info

Publication number: CN212251327U
Application number: CN202021529528.5U
Authority: CN
Inventors: 范茂林
Original assignee: Wenzhou Penlian Co ltd
Current assignee: Wenzhou Penlian Co ltd
Priority date: 2020-07-29
Filing date: 2020-07-29
Publication date: 2020-12-29
Anticipated expiration: 2030-07-29

Abstract

The utility model relates to an air compressor machine part, in particular to admission valve for integration frequency conversion screw rod air compressor machine has solved the service problem of admission valve. Including outer valve body, fixed valve body, check valve rod, piston and sealed roof, be equipped with the regulation chamber in the outer valve body, outer valve body lower part is equipped with the installation cavity that supplies sealed roof, piston and fixed valve body to pack into in proper order, outer valve body upper portion outer wall is equipped with exhaust access mouth, regulation cavity and installation cavity communicate in proper order, the check valve rod is located and is adjusted the intracavity, and exhaust access mouth and adjust between the chamber and move through check valve rod and shelter from the wall, form movable chamber between sealed roof and the fixed valve body, movable intracavity sliding fit is located to the piston, piston one end is stretched out movable chamber and check valve rod looks butt, and integrated design, compact structure, intake and lose heart and all in the valve body, have avoided the waste of material, have practiced thrift the cost, and in addition use reliable and stable, convenient maintenance.

Description

Air inlet valve for integrated variable-frequency screw air compressor

Technical Field

The utility model relates to an air compressor machine part, in particular to admission valve for integration frequency conversion screw rod air compressor machine.

Background

The air inlet valve of the air compressor can also be called an air inlet control combination valve and has the functions of air inlet control, loading and unloading control, capacity and regulation control, unloading, oil injection prevention during unloading or stopping and the like. The air inlet valve is provided with two pipelines, and one pipeline is emptied; one path of the valve releases residual air in the valve, so that the normal loading of the compressor is ensured. When the tank is unloaded, the current is too large, which indicates that the tank pressure is higher, the opening tip of the air inlet valve is large, and the emptying screw is required to be adjusted, so that the tank pressure is not too high.

The existing air inlet valve for the variable-frequency screw air compressor can not avoid using an externally arranged air relief valve body. The split type structure is easy to have the problem of tightness in actual use, and meanwhile, more materials are used, the cost is high, and the maintenance is inconvenient. The product which is integrated and stable and convenient to use is lacked.

Disclosure of Invention

Not enough to prior art, the utility model provides an integration frequency conversion is admission valve for screw rod air compressor.

In order to realize the purpose, the utility model adopts the technical scheme that: an air inlet valve for an integrated variable-frequency screw air compressor comprises an outer valve body, a fixed valve body, a check valve rod, a piston and a sealing top, wherein the fixed valve body is of a ventilated hollow structure, an air passage for air circulation is formed between the fixed valve body and the outer valve body, the air passage is closed or communicated through the movement of the sealing top, an adjusting cavity is arranged in the outer valve body, the lower part of the outer valve body is provided with an installation cavity for the sealing top, the piston and the fixed valve body to be sequentially arranged in, the outer wall of the upper part of the outer valve body is provided with an exhaust access port, the adjusting cavity and the installation cavity are sequentially communicated, the check valve rod is arranged in the adjusting cavity to linearly reciprocate and shield and separate the exhaust access port and the adjusting cavity through the check valve rod movement, the sealing top is sleeved with the fixed valve body, a movable cavity is formed between the sealing top and the fixed valve body, one end of the piston extends out of the movable cavity and is abutted against the check valve rod, a flange is arranged on the piston, a return spring is arranged between the flange and the sealing top, and a check spring is arranged between the flange and the fixed valve body.

Preferably, the adjusting cavity is provided with a plug and a first inner snap ring at one end of the check valve rod, and the bottom of the mounting cavity is partially of a ventilated hollow structure.

Preferably, adjust the chamber lower part and be equipped with fill shape opening, the exhaust access mouth is perpendicular mutually with adjusting the chamber axis, the check valve rod has the sealed sealing with adjusting chamber fill shape opening laminating.

Preferably, a sealing ring is arranged at the sealing part.

Preferably, the bottom of the mounting cavity is of a step-shaped structure, and the upper part of the sealing top is abutted to the mounting cavity.

Preferably, the inner wall of the sealing top of the movable cavity is provided with a second inner snap ring, and the wall of the hole of the mounting cavity of the outer valve body is provided with a third inner snap ring for limiting the movement of the fixed valve body.

Preferably, the projection of the sealing top along the radial direction is in a T-shaped shape.

Preferably, the fixed valve body has a T-shaped projection in the radial direction.

Preferably, the movable cavity is provided with a limiting part at the inner wall of the fixed valve body, the limiting part is of a stepped structure, and one end of the check spring is abutted and limited against the limiting part.

The utility model has the advantages that: the utility model provides a pair of integration frequency conversion screw rod is admission valve integrated design, compact structure for air compressor, admit air and lose heart all in the valve body, avoided the waste of material, practiced thrift the cost, use reliable and stable in addition, the maintenance is maintained to the convenience.

Drawings

Fig. 1 is a schematic sectional structure of the present invention;

FIG. 2 is a schematic view of a three-dimensional assembly structure of the present invention;

fig. 3 is a schematic view of the three-dimensional exploded structure of the present invention.

Detailed Description

As shown in fig. 1-3, an air inlet valve for an integrated variable frequency screw air compressor comprises an outer valve body 1, a fixed valve body 2, a check valve rod 3, a piston 4 and a seal top 5, wherein the fixed valve body is of a ventilating hollow structure, an air passage for air circulation is formed between the fixed valve body 2 and the outer valve body 1, the air passage is closed or closed by the movement of the seal top 5, an adjusting cavity 6 is arranged in the outer valve body 1, an installation cavity 7 for the seal top 5, the piston 4 and the fixed valve body 2 to be sequentially installed is arranged at the lower part of the outer valve body 1, an exhaust inlet 8 is arranged on the outer wall of the upper part of the outer valve body 1, the exhaust inlet 8, the adjusting cavity 6 and the installation cavity 7 are sequentially communicated, the check valve rod 3 is arranged in the adjusting cavity 6, and the exhaust inlet 8 and the adjusting cavity 6 are movably blocked by the check valve rod 3, the seal top 5 is sleeved with the fixed valve body 2, form movable chamber between seal top 5 and the fixed valve body 2, movable intracavity sliding fit is located to

piston

4, 4 one end of piston stretches out movable chamber and check valve rod 3 looks butt, be equipped with flange 9 on the piston 4, be equipped with reset spring 10 between flange 9 and the seal top 5, and be equipped with check spring 11 between flange 9 and the fixed valve body 2. The exhaust access port 8 is connected with an oil-gas barrel for emptying, wherein the oil-gas barrel is externally arranged. The sealing top 5 is matched with the fixed valve body 2 for sealing and installing the piston 4 and is matched and linked with the check valve rod 3.

The adjusting cavity 6 is provided with a plug 12 and a first inner snap ring 13 at one end of the check valve rod 3, so that leakage is prevented, and the check valve rod is fixed in a limiting manner. The bottom of the mounting cavity 7 is partially of a ventilated hollow structure, the range is limited, and the sealing top 5 is convenient to seal when being propped against, namely the air inlet valve is closed.

Adjust the chamber 6 lower part and be equipped with fill shape opening 14, exhaust access port 8 is perpendicular with adjusting 6 axis looks, check valve rod 3 has the sealed sealing 15 of 14 laminating of fill shape openings of adjusting chamber 6. The hopper-shaped shape is beneficial to reducing the radial flow rate and is convenient to control, and the gap is reduced when the radial flow rate and the axial flow rate are fitted.

The sealing portion 15 is provided with a sealing ring 16, and the sealing performance is enhanced by the sealing ring 16.

The bottom of the mounting cavity 7 is of a step-shaped structure, and the upper part of the seal top 5 is abutted against the mounting cavity 7. The diameter of the seal top 5 is larger than that of the second step at the bottom of the mounting cavity 7. Compared with a socket type structure, the structure is more beneficial to moving and ventilating up and down smoothly, and can bend the airflow flow path by 90 degrees when sealing is needed, so that leakage is reduced, and the characteristics similar to labyrinth sealing are achieved. In addition, the upper part of the sealing top 5 is also provided with a sealing ring, and the sealing ring is not easy to damage after long-term use.

The inner wall of the movable cavity at the position of the sealing top 5 is provided with a second inner snap ring 17, and the wall of the hole of the mounting cavity 7 of the outer valve body 1 is provided with a third inner snap ring 18 for limiting the movement of the fixed valve body 2. In the same way, the function of limiting and fixing is achieved.

The radial projection of the sealing top 5 is T-shaped, and the radial projection of the fixed valve body 2 is T-shaped, so that the sealing valve is convenient to produce and is in sleeve joint fit.

The movable cavity is provided with a limiting part 19 at the inner wall of the fixed valve body 2, the limiting part 19 is of a step-shaped structure, and one end of the check spring 11 is abutted and limited with the limiting part 19. During assembly, the sealing top 5, the return spring 10 and the piston 4 are sleeved together, and then the sealing top and the return spring 11 are installed in the fixed valve body 2. The structure is firm, the design is ingenious, the excessive complexity is not needed, and the assembly and the maintenance are convenient.

The principle is as follows: when the air compressor is started, stopped and unloaded, the air leakage magnetic valve supplies air to the piston 4 by using the air inlet, the piston 4 and the sealing top 5 move downwards due to air pressure, and the check valve rod 3 moves downwards to close the air exhaust access port 8; when the pressure of the air compressor after full-load work reaches the set upper pressure limit, the discharge electromagnetic valve is de-energized and starts to discharge, the lower end return spring 10 pushes the piston 4 and the check valve rod 3 to move upwards, the exhaust access port 8 is deflated, and the air inlet valve is in a closed state. The ventilation of the air inlet valve relative to the longitudinal direction is realized through a penetrating or hollow structure, and the opening and the closing of the air inlet valve are realized through the movement of the sealing top 5. The air inlet valve on the whole has the air direction similar to that of the traditional structure and more styles, and is not elaborated and limited to better protect the application.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, and are only for convenience of description, and are not intended to indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and therefore, are not to be considered as limitations of the present invention, and the fundamental principles, main features, and advantages of the present invention have been shown and described above, as would be understood by those skilled in the art.

Claims

1. The utility model provides an admission valve for integration frequency conversion screw rod air compressor which characterized in that, includes outer valve body, fixed valve body, non return valve rod, piston and seal cap, fixed valve body is the hollow out construction of ventilating, form the air flue that supplies the gas circulation between fixed valve body and the outer valve body, the air flue carries out closed circuit or route through the removal of seal cap, be equipped with the regulation chamber in the outer valve body, outer valve body lower part is equipped with the installation cavity that supplies seal cap, piston and fixed valve body to pack into in proper order, outer valve body upper portion outer wall is equipped with the exhaust access, regulation chamber and installation cavity communicate in proper order, non return valve rod locates the straight reciprocating motion in the regulation cavity, and the exhaust access and the regulation cavity between sheltering from the wall through non return valve rod removal, cup joint between seal cap and the fixed valve body, form the activity chamber between seal cap and the fixed valve body, the piston is arranged in the movable cavity in a sliding fit mode, one end of the piston extends out of the movable cavity and is abutted to the check valve rod, a flange is arranged on the piston, a return spring is arranged between the flange and the sealing top, and the check spring is arranged between the flange and the fixed valve body.

2. The air inlet valve for the integrated variable frequency screw air compressor as claimed in claim 1, wherein the regulating cavity is provided with a plug and a first inner snap ring at the loading end of the check valve rod, and the bottom of the mounting cavity is partially of a ventilated hollow structure.

3. The air inlet valve for the integrated variable frequency screw air compressor as claimed in claim 1 or 2, wherein a hopper-shaped opening is formed in the lower portion of the adjusting cavity, the air exhaust access port is perpendicular to the axis of the adjusting cavity, and the check valve rod is provided with a sealing portion which is in fit sealing with the hopper-shaped opening of the adjusting cavity.

4. The air intake valve for an integrated variable frequency screw air compressor as claimed in claim 3, wherein a sealing ring is provided at the sealing portion.

5. The intake valve for an integrated variable frequency screw air compressor as claimed in claim 1, wherein the bottom of the mounting cavity is of a stepped structure, and the upper part of the sealing top abuts against the mounting cavity.

6. The intake valve for an integrated variable frequency screw air compressor as claimed in claim 1, wherein the movable chamber is provided with a second inner snap ring on the inner wall of the seal head, and the outer valve body is provided with a third inner snap ring on the wall of the mounting chamber hole for limiting the movement of the fixed valve body.

7. The air intake valve for an integrated variable frequency screw air compressor as claimed in claim 5, wherein a radial projection of the sealing crown is in a T-shape.

8. The intake valve for an integrated variable frequency screw air compressor as claimed in claim 1, wherein the fixed valve body has a T-shaped projection in the radial direction.

9. The intake valve of claim 7, wherein the movable cavity is provided with a limiting portion at an inner wall of the fixed valve body, the limiting portion is of a stepped structure, and one end of the check spring abuts against the limiting portion for limiting.