CN218325270U

CN218325270U - High-low pressure conversion natural gas screw compressor

Info

Publication number: CN218325270U
Application number: CN202222291970.4U
Authority: CN
Inventors: 叶宗健
Original assignee: Dragon Force Shenzhen Energy Equipment Co ltd
Current assignee: Dragon Force Shenzhen Energy Equipment Co ltd
Priority date: 2022-08-30
Filing date: 2022-08-30
Publication date: 2023-01-17
Anticipated expiration: 2032-08-30

Abstract

The utility model discloses a high-low pressure conversion natural gas screw compressor, which is applicable to gas media which are allowed to leak, such as natural gas, and solves the application occasion needing high-low pressure conversion, the main engine of the compressor is a two-stage compression integrated machine and is provided with a middle-stage exhaust port and a main exhaust port; the oil-gas conveying pipe comprises an output section and an input section, a three-way valve is arranged between the output section and the input section, the three-way valve comprises an inlet, an outlet and a bypass, two ends of the output section are respectively communicated with the main exhaust port and the inlet, two ends of the input section are respectively communicated with the outlet and the oil-gas separator, and the bypass is communicated with the middle-stage exhaust port through a bypass pipeline; a backflow pipe is arranged between the backflow port and the output section, two ends of the backflow pipe are respectively communicated with the backflow port and the output section, and a two-way valve used for controlling the on-off of a medium between the backflow port and the output section is arranged on the backflow pipe.

Description

High-low pressure conversion natural gas screw compressor

Technical Field

The utility model relates to a high-low pressure conversion natural gas helical-lobe compressor technical field especially relates to a high-low pressure conversion natural gas helical-lobe compressor.

Background

In the conventional air screw compressor, there is a compressor system capable of realizing high-low pressure conversion. This system is equipped with 2 pressure regulators to accommodate different pressure requirements. The on-off of the pipeline is switched by the power-on and power-off of the electromagnetic valve, so that which pressure regulator works is determined, and the working pressure of the pressure regulator is obtained.

For example, the chinese utility model with the publication number CN206234116U discloses an air compressor for providing high-low pressure gas, which comprises a low-pressure gas supply unit and a high-pressure gas supply unit; the low-pressure air supply unit comprises a first motor, a first dehumidifying device, a screw compressor and a buffer tank; the screw compressor, the first dehumidifying device and the buffer tank are connected one by one through pipelines according to the flowing direction of the gas; a low-pressure gas outlet end is arranged on the buffer tank; the high-pressure air supply unit comprises a second motor, a second dehumidifying device and a piston compressor; the piston compressor is connected with the second dehumidifying device through a pipeline according to the gas flowing direction; the air outlet end of the buffer tank is connected with the air inlet end of the piston compressor; the second dehumidifying device is provided with a high-pressure gas outlet end; the air compressor can provide high-pressure and low-pressure gas at the same time, and is provided with a first dehumidifying device and a second dehumidifying device for dehumidifying the gas.

Because the pressure regulator can exhaust air through the small hole all the time when in operation. Therefore, the gas leakage prevention device is only suitable for gas media which are allowed to leak, such as air, and is not suitable for gas media which are not allowed to leak, such as natural gas and the like, such as inflammable and explosive.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, one of the purposes of the utility model is to provide a high-low pressure conversion natural gas screw compressor, which is applicable to gas media allowing leakage, such as natural gas, and solves the application occasion requiring high-low pressure conversion.

The utility model discloses an one of the purpose adopts following technical scheme to realize:

a high-low pressure conversion natural gas screw compressor host comprises a base, an air inlet filter, an air inlet valve, a motor, a compressor host, an oil-gas separator and a cooler, wherein an oil-gas conveying pipe is communicated between the compressor host and the oil-gas separator, a backflow port is formed in the air inlet valve, and the compressor host is a two-stage compression integrated machine and is provided with a middle-stage exhaust port and a main exhaust port;

the oil-gas conveying pipe comprises an output section and an input section, a three-way valve is arranged between the output section and the input section, the three-way valve comprises an inlet, an outlet and a bypass, two ends of the output section are respectively communicated with the main exhaust port and the inlet, two ends of the input section are respectively communicated with the outlet and the oil-gas separator, and the bypass is communicated with the middle-stage exhaust port through a bypass pipeline;

a backflow pipe is arranged between the backflow port and the output section, two ends of the backflow pipe are respectively communicated with the backflow port and the output section, and a two-way valve used for controlling the connection and disconnection of media between the backflow port and the output section is arranged on the backflow pipe.

Furthermore, the two-way valve and the three-way valve are electric ball valves.

Furthermore, a plurality of vibration dampers are arranged at the bottoms of the motor and the compressor main machine.

Furthermore, the shock absorber comprises a spring, an upper shock absorption sleeve and a lower shock absorption sleeve which are both in a rotator structure, and the upper shock absorption sleeve and the lower shock absorption sleeve are connected through a bolt and are coaxially arranged;

the spring is arranged on the bolt in a penetrating mode and located between the upper vibration damping sleeve and the lower vibration damping sleeve.

Furthermore, the downward surface of the upper damping sleeve and the downward surface of the lower damping sleeve are both provided with grooves, and the bottom of the lower damping sleeve is provided with a supporting plate used for connecting the base.

Compared with the prior art, the beneficial effects of the utility model reside in that:

1. through the design of a closed pipeline, the problem that a gas medium of a traditional compressor system needs to be leaked is avoided while high-low pressure conversion is realized, and the gas medium is suitable for flammable and explosive gas media which do not allow to be leaked, and the application occasion that high-low pressure conversion is needed is solved;

2. through the setting of shock absorber, the vibration that buffering compressor host computer and motor produced reduces the influence to other spare parts on the base, extends the stability that each spare part is connected.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented according to the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more obvious and understandable, the following preferred embodiments are described in detail with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic structural diagram of the present embodiment;

FIG. 2 is a partial schematic view of the present embodiment;

fig. 3 is a sectional view of the damper in this embodiment.

In the figure: 11. a base; 12. an intake air filter; 13. an intake valve; 14. a motor; 15. a compressor main machine; 16. an oil-gas separator; 17. a cooler; 21. a middle stage exhaust port; 22. a main exhaust port; 23. a return port; 31. an output section; 32. an input section; 33. a three-way valve; 34. a return pipe; 35. a two-way valve; 36. a bypass conduit; 41. an upper damping sleeve; 42. a lower damping sleeve; 43. A bolt; 44. a spring; 45. a groove; 46. and a support plate.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 3, a main unit 15 of a high-low pressure conversion natural gas screw compressor includes a base 11, an air intake filter 12, an air intake valve 13, a motor 14, a main unit 15 of the compressor, an oil-gas separator 16, a cooler 17, and other main components. An oil-gas conveying pipe is communicated between the compressor main machine 15 and the oil-gas separator 16, and a return opening 23 is formed in the air inlet valve 13. In order to realize the high-low pressure conversion of inflammable and explosive gas medium which does not need the outside, the compressor main body 15 in this embodiment adopts an integrated machine with a two-stage compression function, or a single machine head (two screw rods with intermediate pressure), and therefore two exhaust channels, namely a middle-stage exhaust port 21 and a main exhaust port 22, are provided.

Then the oil and gas conveying pipe is split into an output section 31 and an input section 32, a three-way valve 33 is arranged between the output section 31 and the input section 32, the selected three-way valve 33 comprises an inlet, an outlet and a bypass, two ends of the output section 31 are respectively communicated with the main exhaust port 22 and the inlet, two ends of the input section 32 are respectively communicated with the outlet and the oil-gas separator 16, and the bypass is communicated with the middle-stage exhaust port 21 through a bypass pipeline 36.

Meanwhile, a return pipe 34 is arranged between the return port 23 and the output section 31, two ends of the return pipe 34 are respectively communicated with the return port 23 and the output section 31, and a two-way valve 35 for controlling the connection and disconnection of media between the return port 23 and the output section 31 is arranged on the return pipe 34.

Through the arrangement, the switching of high pressure and low pressure and the backflow of the leaked gas medium are realized, and a closed loop is formed. Wherein two-way valve 35 all adopts electronic ball valve with three-way valve 33, can realize automated control on the one hand, and is more intelligent, convenient, and on the other hand can improve the leakproofness of pipeline, long service life, and the dependable performance improves the security of using in the natural gas field.

In addition, in order to avoid the problems that the vibration of the motor 14 and the compressor main unit 15 during operation affects the sealing performance between other parts on the base 11, and the like, a plurality of vibration dampers are arranged at the bottoms of the motor 14 and the compressor main unit 15. The specific structure of the shock absorber comprises a spring 44, an upper shock absorption sleeve 41 and a lower shock absorption sleeve 42 which are both rotary body structures, equipment is pressed on the upper shock absorption sleeve 41 for supporting, the upper shock absorption sleeve 41 and the lower shock absorption sleeve 42 are connected through a bolt 43 and coaxially arranged, then the spring 44 penetrates through the bolt 43 and is positioned between the upper shock absorption sleeve 41 and the lower shock absorption sleeve 42, during shock absorption, the compression of the spring 44 can be utilized for achieving shock absorption, and the two shock absorption sleeves are connected with and matched with the corresponding structures. Then, the downward surface of the upper damping sleeve 41 and the downward surface of the lower damping sleeve 42 are both provided with grooves 45, so that the two damping sleeves can be overlapped during buffering, the phenomenon of dislocation of the two damping sleeves is reduced, and the bottom of the lower damping sleeve 42 is provided with a supporting plate 46 for connecting the base 11 and is stably connected with the base 11.

The method of use of this example is as follows:

1. when high-pressure air supply is needed, the two-way ball valve is closed, the straight-through opening and the bypass of the three-way ball valve are closed, and the compressor main machine 15 exhausts air to discharge air according to a normal pipeline.

2. When low-pressure air supply is needed, the two-way ball valve is opened, the straight-through of the three-way ball valve is closed, the bypass of the three-way ball valve is opened, and exhaust gas of the compressor main machine 15 enters the oil-gas separator 16 from the middle-stage exhaust port 21 through the three-way ball valve; the exhaust gas from the main exhaust port 22 of the compressor main unit 15 is returned to the return port 23 of the intake valve 13 via the two-way ball valve.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.

Claims

1. The utility model provides a high low pressure conversion natural gas helical-lobe compressor host computer (15), includes base (11), air intake filter (12), admission valve (13), motor (14), compressor host computer (15), oil and gas separator (16) and cooler (17), and the intercommunication has the oil gas conveyer pipe between compressor host computer (15) and oil and gas separator (16), is equipped with backward flow mouth (23) on admission valve (13), its characterized in that: the compressor main machine (15) is a two-stage compression integrated machine and is provided with a middle-stage exhaust port (21) and a main exhaust port (22);

the oil and gas conveying pipe comprises an output section (31) and an input section (32), a three-way valve (33) is arranged between the output section (31) and the input section (32), the three-way valve (33) comprises an inlet, an outlet and a bypass, two ends of the output section (31) are respectively communicated with a main exhaust port (22) and the inlet, two ends of the input section (32) are respectively communicated with the outlet and an oil-gas separator (16), and the bypass is communicated with a middle-stage exhaust port (21) through a bypass pipeline (36);

a return pipe (34) is arranged between the return port (23) and the output section (31), two ends of the return pipe (34) are respectively communicated with the return port (23) and the output section (31), and a two-way valve (35) used for controlling the connection and disconnection of media between the return port (23) and the output section (31) is arranged on the return pipe (34).

2. A high-low pressure switching natural gas screw compressor main unit (15) according to claim 1, wherein: the two-way valve (35) and the three-way valve (33) are both electric ball valves.

3. A high-low pressure switching natural gas screw compressor main unit (15) according to claim 1 or 2, wherein: and a plurality of vibration dampers are arranged at the bottoms of the motor (14) and the compressor main machine (15).

4. A high-low pressure switching natural gas screw compressor main unit (15) according to claim 3, wherein: the shock absorber comprises a spring (44), an upper shock absorption sleeve (41) and a lower shock absorption sleeve (42) which are both in a rotating body structure, wherein the upper shock absorption sleeve (41) and the lower shock absorption sleeve (42) are connected through a bolt (43) and are coaxially arranged;

the spring (44) penetrates through the bolt (43) and is positioned between the upper damping sleeve (41) and the lower damping sleeve (42).

5. A high-low pressure switching natural gas screw compressor host (15) according to claim 4, wherein: and one surface of the upper damping sleeve (41) facing downwards and one surface of the lower damping sleeve (42) facing downwards are both provided with a groove (45), and the bottom of the lower damping sleeve (42) is provided with a support plate (46) for connecting the base (11).