A screw air compressor system

Abstract

The present invention relates to a screw air compressor system, comprising a main engine, an intake valve arranged on the upper part of the main engine body, an oil fine separator arranged on the main engine body and connected to the oil-gas chamber in the main engine, and a minimum pressure valve arranged at the lower part of the oil fine separator and connected to the oil fine separator, wherein the intake valve comprises an intake valve body, the intake valve body is hollow to form an intake passage, the minimum pressure valve comprises a pressure valve body and a valve core, a through hole is arranged on the intake valve body, an exhalation hole is arranged at the bottom of the pressure valve body, and the exhalation hole is connected to the through hole on the intake valve body through an oil guide pipe. The present invention connects the exhalation hole at the bottom of the pressure valve body of the minimum pressure valve with the through hole arranged on the intake valve body of the intake valve through the oil guide pipe, thereby guiding the oil droplets appearing at the exhalation hole at the bottom of the pressure valve body due to the wear of the sealing ring of the valve core in the minimum pressure valve back to the inside of the intake valve, and preventing the oil droplets from leaking to the outside of the main engine through the exhalation hole.

Description

Technical Field

[0001] The invention relates to the technical field of air compressor accessories. Background Art

[0002] Air compressors (hereinafter referred to as air compressors) are widely used in industrial production. The existing air compressors are mainly piston type, screw type and centrifugal type. Each of the three types of air compressors has its own advantages and disadvantages. The minimum pressure valve is a necessary component of the air compressor. Its function is to not supply air to the outside immediately after the air compressor is pneumatic. Secondly, it first establishes the circulation pressure required for the lubricating liquid to ensure the lubrication of the air compressor. When the gas pressure reaches the set pressure, the minimum pressure valve opens to supply air to the outside, otherwise the minimum pressure valve is closed.

[0003] However, when the air compressor is working, due to the wear of the moving valve core sealing ring, a small amount of compressed oil-gas mixture will leak from the worn part to the space at the bottom of the valve core. After the valve body is cooled, a small amount of liquid oil-water mixture will be formed inside it. When the air compressor is started again, the moving valve core moves downward, and the small amount of liquid oil-water mixture remaining in the lower space will be discharged from the exhalation hole, so oil droplets will form outside the exhalation hole of the minimum pressure valve. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a screw air compressor system.

[0005] In order to solve the above technical problems, the technical solution of the present invention is as follows:

[0006] A screw air compressor system includes a main engine, an intake valve arranged on the upper part of the main engine body, an oil fine separator arranged on the main engine body and connected to the oil and gas chamber in the main engine, and a minimum pressure valve arranged at the lower part of the oil fine separator and connected to the oil fine separator, the intake valve includes an intake valve body, the intake valve body is hollow to form an intake passage, the minimum pressure valve includes a pressure valve body and a valve core moving inside the pressure valve body, and is characterized in that a through hole is provided on the intake valve body, an exhalation hole is provided at the bottom of the pressure valve body, and the exhalation hole is connected to the through hole on the intake valve body through an oil guide pipe.

[0007] Furthermore, as a preferred technical solution, the exhalation hole is configured as a threaded hole structure, and a first pipe joint matching the exhalation hole and connected to one end of the oil guide pipe is provided on the exhalation hole.

[0008] Furthermore, as a preferred technical solution, a sealant is applied to the connection between the first pipe joint and the exhalation hole.

[0009] Furthermore, as a preferred technical solution, the through hole is configured as a threaded hole structure, and a second pipe joint matching the through hole and connected to the other end of the oil guide pipe is provided on the through hole.

[0010] Furthermore, as a preferred technical solution, sealant is applied at the connection between the second pipe joint and the threaded hole.

[0011] Further, as a preferred technical solution, the oil guide pipe includes a stainless steel pipe, and the oil guide pipe is configured as a bent structure according to the installation requirements of the air compressor system.

[0012] Further, as a preferred technical solution, the oil guide pipe includes a plastic pipe.

[0013] Furthermore, as a preferred technical solution, a check valve plate is provided in the air intake passage, the check valve plate is installed in the air intake passage through a check spring, a pressure relief valve is provided on the air intake valve body, the pressure relief valve includes a pressure relief chamber provided in the pressure relief valve body, and the pressure relief chamber is connected to the air intake passage at the upper and lower ends of the check valve plate through two pipelines.

[0014] Further, as a preferred technical solution, the through hole is arranged on the intake valve body where the intake passage at the upper end of the check valve plate is located.

[0015] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0016] The present invention connects the exhalation hole at the bottom of the pressure valve body of the minimum pressure valve with the through hole arranged on the intake valve body of the intake valve through an oil guide pipe, thereby guiding the oil droplets appearing in the exhalation hole at the bottom of the pressure valve body due to wear of the sealing ring of the valve core in the minimum pressure valve back to the interior of the intake valve, thereby preventing the oil droplets from leaking to the outside of the main engine through the exhalation hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of the minimum pressure valve of the present invention.

[0018] Figure 2 This is a structural diagram of the minimum pressure valve of the present invention.

[0019] Figure 3 This is a structural diagram of the intake valve of the present invention.

[0020] The drawings are only used for illustrative purposes and should not be construed as limitations on this patent. In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. The same or similar numbers correspond to the same or similar parts. The terms describing the positional relationship in the drawings are only used for illustrative purposes and should not be construed as limitations on this patent. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby more clearly defining the protection scope of the present invention.

[0022] Example 1

[0023] A screw air compressor system, such as Figure 1-3 As shown: it includes a main engine, an intake valve 1 arranged on the upper part of the main engine body, an oil fine separator arranged on the main engine body and connected to the oil and gas chamber in the main engine, and a minimum pressure valve 2 arranged at the lower part of the oil fine separator and connected to the oil fine separator. The intake valve 1 includes an intake valve body 11, and the intake valve body 11 is hollow to form an intake channel 111. The minimum pressure valve 2 includes a pressure valve body 21 and a valve core moving inside the pressure valve body 21. A through hole 112 is provided on the intake valve body 11, and an exhalation hole 211 is provided at the bottom of the pressure valve body 21. The exhalation hole 211 is connected to the through hole 112 on the intake valve body 11 through an oil guide pipe 3.

[0024] The exhalation hole 211 is set as a threaded hole structure, and a first pipe joint 22 matching the exhalation hole 211 and connected to one end of the oil guide pipe 3 is provided on the exhalation hole 211, and a sealant is applied at the connection between the first pipe joint 22 and the exhalation hole 211; in this embodiment, the first pipe joint 22 plus a gasket is installed at the breathing hole position, and the first pipe joint 22 is a ferrule-type end straight-through pipe joint, and a right-angle movable joint is also connected to the first pipe joint 22.

[0025] The through hole 112 is set as a threaded hole structure, and a second pipe joint matching the through hole 112 and connected to the other end of the oil guide pipe 3 is provided on the through hole 112, and a sealant is applied at the connection between the second pipe joint and the through hole 112. In this embodiment, the second pipe joint is installed at the hole position of the through hole, and the second pipe joint is a ferrule-type straight-through pipe joint, and a right-angle movable joint is also connected to the second pipe joint 22.

[0026] The oil guide pipe 3 includes a stainless steel pipe and a plastic pipe. When the oil guide pipe 3 is a stainless steel pipe, the oil guide pipe 3 is set to a bent structure according to the installation requirements of the air compressor system. When the oil guide pipe 3 is a plastic pipe, the oil guide pipe 3 is set to a bent structure according to the installation requirements of the air compressor system.

[0027] The structure of the intake valve 1 of the present invention is as follows Figure 3As shown, a check valve plate 12 is provided in the intake passage 111, the check valve plate 12 is installed in the intake passage 111 through a check spring 13, a pressure relief valve 14 is provided on the intake valve body 11, the pressure relief valve 14 includes a pressure relief chamber 142 provided in the pressure relief valve body 141, and the pressure relief chamber 142 is communicated with the intake passage 111 at the upper and lower ends of the check valve plate 12 through two pipelines 143. The through hole 112 is provided on the intake valve body 11 where the intake passage 111 at the upper end of the check valve plate 12 is located.

[0028] The present invention connects the exhalation hole 11 at the bottom 21 of the pressure valve body of the minimum pressure valve 2 with the through hole 112 provided on the intake valve body 11 of the intake valve 1 through the oil guide pipe 3, thereby guiding the oil droplets appearing in the exhalation hole 211 at the bottom 21 of the pressure valve body due to the wear of the sealing ring of the valve core in the minimum pressure valve 2 back to the intake channel 111 inside the intake valve 1, thereby preventing the oil droplets from leaking to the outside of the main engine through the exhalation hole.

[0029] The structure of the intake valve 1 of the present invention is prior art, and the specific structure is shown in a compressor intake valve with authorization number CN201621001011.2.

[0030] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A screw air compressor system, comprising a main engine, an intake valve (1) arranged on the upper part of the main engine body, an oil fine separator arranged on the main engine body and connected to the oil-gas chamber in the main engine, and a minimum pressure valve (2) arranged at the lower part of the oil fine separator and connected to the oil fine separator, wherein the intake valve (1) comprises an intake valve body (11), the intake valve body (11) is hollow to form an intake passage (111), the minimum pressure valve (2) comprises a pressure valve body (21) and a valve core moving inside the pressure valve body (21), and is characterized in that: A through hole (112) is provided on the intake valve body (11), and an exhalation hole (211) is provided at the bottom of the pressure valve body (21), and the exhalation hole (211) is connected to the through hole (112) on the intake valve body (11) via an oil guide pipe (3); The exhalation hole (211) is configured as a threaded hole structure, and a first pipe joint (22) matching the exhalation hole (211) and connected to one end of the oil guide pipe (3) is provided on the exhalation hole (211); The through hole (112) is configured as a threaded hole structure, and a second pipe joint matching the through hole (112) and connected to the other end of the oil guide pipe (3) is provided on the through hole (112).

2. A screw air compressor system according to claim 1, characterized in that: A sealant is applied to the connection between the first pipe joint (22) and the exhalation hole (211).

3. A screw air compressor system according to claim 1, characterized in that: Sealant is applied to the connection between the second pipe joint and the through hole (112).

4. A screw air compressor system according to claim 1, characterized in that: The oil guide pipe (3) comprises a stainless steel pipe, and the oil guide pipe (3) is configured as a bent structure according to the installation requirements of the air compressor system.

5. A screw air compressor system according to claim 1, characterized in that: The oil guide pipe (3) comprises a plastic pipe.

6. A screw air compressor system according to claim 1, characterized in that: A check valve plate (12) is arranged in the air intake passage (111), and the check valve plate (12) is installed in the air intake passage (111) via a check spring (13). A pressure relief valve (14) is arranged on the air intake valve body (11), and the pressure relief valve (14) comprises a pressure relief chamber (142) arranged in the pressure relief valve body (141). The pressure relief chamber (142) is connected to the air intake passage (111) at the upper and lower ends of the check valve plate (12) via two pipelines (143).

7. A screw air compressor system according to claim 6, characterized in that: The through hole (112) is arranged on the intake valve body (11) where the intake passage (111) at the upper end of the check valve plate (12) is located.

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