CN219954346U - Special pressure regulating device of screw compressor BOG recycling machine - Google Patents
Special pressure regulating device of screw compressor BOG recycling machine Download PDFInfo
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- CN219954346U CN219954346U CN202321506906.1U CN202321506906U CN219954346U CN 219954346 U CN219954346 U CN 219954346U CN 202321506906 U CN202321506906 U CN 202321506906U CN 219954346 U CN219954346 U CN 219954346U
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- 230000001105 regulatory effect Effects 0.000 title claims abstract description 37
- 238000004064 recycling Methods 0.000 title claims abstract description 14
- 238000007789 sealing Methods 0.000 claims abstract description 9
- 230000006835 compression Effects 0.000 claims abstract description 5
- 238000007906 compression Methods 0.000 claims abstract description 5
- 229920001971 elastomer Polymers 0.000 claims abstract description 5
- 239000000806 elastomer Substances 0.000 claims abstract description 5
- 239000007789 gas Substances 0.000 description 26
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- Structures Of Non-Positive Displacement Pumps (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The utility model discloses a special pressure regulating device for a BOG recycling machine of a screw compressor, which comprises a main pressure regulating valve, an upper gas circuit and a lower gas circuit, wherein the upper gas circuit and the lower gas circuit are connected with the main pressure regulating valve; the main pressure regulating valve comprises a valve body, a valve cover, a piston, an air inlet and an air outlet; a sealing ring is arranged between the valve cover and the valve body, and a moving body and a fixed body are sequentially arranged below the valve cover; the piston passes through the valve cover from top to bottom, is connected with the valve cover in a sealing way, is fixedly connected with the moving body, and finally passes through the fixed body and is movably connected with the fixed body; a movable valve is arranged at the movable connection part of the fixed body and the piston; an upper cavity is formed between the valve cover and the movable body, an intermediate cavity is formed between the movable body and the fixed body, and a lower cavity is formed between the fixed body and the bottom of the valve body; the air inlet is positioned at the lower cavity, and the air outlet is positioned at the middle cavity; the bottom of the valve body is provided with a compression nut which is connected with the bottom of the piston, and the connecting part is provided with an elastomer; the upper gas circuit is provided with a micro pressure regulating valve and an electromagnetic gas bypass valve and is connected with the upper part of the valve body through the electromagnetic gas bypass valve; the lower gas path is directly connected with a gas inlet below the valve body.
Description
Technical Field
The utility model relates to the technical field of BOG recovery, in particular to a pressure regulating device special for a screw compressor BOG recovery machine.
Background
At present, most domestic natural gas BOG recovery machines use piston machines, and a small amount of screw machines are used, because the split screw machine body has weak gas high pressure resistance of the shaft seal, and a pressure regulating device is added in front for protection.
However, the existing pressure regulating valve (pressure reducing valve) has the problem that the outlet gas discharge capacity is reduced when the inlet pressure is reduced, so that when the pressure regulating valve is installed on a screw compressor BOG recycling machine for use, the discharge capacity of the natural gas BOG recycling machine is reduced, and the working efficiency of the screw compressor BOG recycling machine is reduced.
Disclosure of Invention
The utility model aims to solve the technical problems that: in order to overcome the problems, the pressure regulating device special for the BOG recycling machine of the screw compressor is provided.
The technical scheme adopted for solving the technical problems is as follows: a pressure regulating device special for a BOG recycling machine of a screw compressor comprises a main pressure regulating valve, an upper gas circuit and a lower gas circuit, wherein the upper gas circuit and the lower gas circuit are connected with the main pressure regulating valve.
The main pressure regulating valve comprises a valve body, a valve cover, a piston, an air inlet and an air outlet; a sealing ring is arranged between the valve cover and the valve body, and a moving body and a fixed body are sequentially arranged below the valve cover; the piston passes through the valve cover from top to bottom, is connected with the valve cover in a sealing way, is fixedly connected with the moving body, and finally passes through the fixed body and is movably connected with the fixed body; the movable valve is arranged at the movable connection part of the fixed body and the piston; an upper cavity is formed between the valve cover and the movable body, an intermediate cavity is formed between the movable body and the fixed body, and a lower cavity is formed between the fixed body and the bottom of the valve body; the air inlet is positioned at the lower cavity, and the air outlet is positioned at the middle cavity; the bottom of the valve body is provided with a compression nut which is connected with the bottom of the piston, and the joint is provided with an elastomer.
The repeated change of the air pressure in the three cavities and the design of the movable valve and the elastic body realize the back and forth movement of the movable body, and the exhaust capacity of the air outlet is effectively increased.
The upper gas circuit is provided with a micro pressure regulating valve and an electromagnetic gas bypass valve and is connected with the upper part of the valve body through the electromagnetic gas bypass valve; the lower gas path is directly connected with a gas inlet below the valve body.
The beneficial effects of the utility model are as follows:
the utility model solves the problems of low air inlet pressure and low air outlet quantity of the existing BOG recycling machine of the screw compressor, achieves the aim of high air displacement while low air inlet pressure, and improves the working efficiency of the BOG recycling machine of the screw compressor.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
1. Valve gap, 2, sealing washer, 3, piston, 4, air inlet, 5, the fixed body, 6, elastomer, 7, gland nut, 8, movable valve, 9, gas outlet, 10, electromagnetic gas bypass valve, 11, little air-vent valve, 12, upper chamber, 13, middle chamber, 14, lower chamber, 15, valve body, 16, mobile body, 17, upper gas circuit, 18, lower gas circuit.
Detailed Description
The utility model will now be described in further detail with reference to the accompanying drawings, which are simplified schematic illustrations, illustrating the basic structure of the utility model only by way of illustration, and thus showing only the structures that are relevant to the utility model.
As shown in fig. 1, the pressure regulating device special for the screw compressor BOG recycling machine comprises a main pressure regulating valve, an upper air passage 17 and a lower air passage 18 which are connected with the main pressure regulating valve,
the main pressure regulating valve comprises a valve body 15, a valve cover 1, a piston 3, an air inlet 4 and an air outlet 9;
a sealing ring 2 is arranged between the valve cover 1 and the valve body 15, and a moving body 16 and a fixed body 5 are sequentially arranged below the valve cover 1; the piston 3 passes through the valve cover 1 from top to bottom, is connected with the valve cover in a sealing way, is fixedly connected with the moving body 16, and finally passes through the fixed body 5 and is movably connected with the moving body; the movable valve 8 is arranged on the fixed body 5 at the movable connection part with the piston 3; an upper cavity 12 is formed between the valve cover 1 and the movable body 16, an intermediate cavity 13 is formed between the movable body 16 and the fixed body 5, and a lower cavity 14 is formed between the fixed body 5 and the bottom of the valve body 15; the air inlet 4 is positioned at the lower cavity 14, and the air outlet 9 is positioned at the middle cavity 13; the bottom of the valve body 15 is provided with a compression nut 7 which is connected with the bottom of the piston 3, and the connecting part is provided with an elastomer 6.
The upper gas circuit 17 is provided with a micro pressure regulating valve 11 and an electromagnetic gas bypass valve 10, and is connected with the upper part of the main pressure regulating valve through the electromagnetic gas bypass valve 10; the lower air passage 18 is directly connected with the air inlet 4 below the main pressure regulating valve.
The BOG passes through a micro pressure regulating valve 11 (a precise gas micro pressure regulating valve) and an electromagnetic gas bypass valve 10 from a pipeline, controls gas to be turned on, turned off and discharged, supplies gas to a main pressure regulating valve, and reduces partial gas pressure.
When the air-conditioning valve is specifically used, the air flow from the upper air passage 17 is larger than the air flow from the lower air passage 18, so that after the air from the upper air passage 17 enters the main pressure regulating valve, the pressure of the upper cavity 12 increases faster, the piston 3 and the moving body 16 are pushed to move downwards, the elastic body 6 is pressed down, the movable valve 8 moves downwards, so that the air entering from the air inlet 4 of the main pressure regulating valve enters the middle cavity 13 from the lower cavity 14 and is discharged from the air outlet 9, and meanwhile, the air flow of the air outlet 9 is increased compared with the air flow in a normal state due to the space compression of the middle cavity 13, and the air displacement is effectively increased;
as time goes on, the upper chamber 12 becomes larger in volume and smaller in pressure; the lower chamber 14 becomes smaller and the pressure becomes larger; at this time, the elastic body 6 acts reversely to push the piston 3 and the moving body 16 to move upwards, and the movable valve 8 is closed;
the BOG in the middle cavity 13 is still effectively discharged by the gas outlet 9 under the extraction of the screw compressor, then the pressure of the middle cavity 13 is reduced, the piston 3 and the movable body 16 move downwards under the continuous gas inlet effect of the upper gas channel 17, the movable valve 8 is opened again, and the dynamic change process is repeated.
Through experimental tests, under the condition that the air inlet 4 has the same air inlet pressure, the air outlet pressure of the air outlet 9 is higher and more stable after the main pressure regulating valve is used.
In summary, the utility model can stabilize the pressure of the air outlet 9 at a higher value while the pressure of the air inlet 4 is not increased, increase the air outlet displacement and improve the working efficiency of the BOG recycling machine of the screw compressor.
With the above description of the preferred embodiments according to the present utility model as an outline, the related workers can make various changes and modifications without departing from the scope of the technical idea of the present utility model, and the technical scope of the present utility model is not limited to the description, but must be determined according to the scope of the claims.
Claims (2)
1. The utility model provides a special pressure regulating device of screw compressor BOG recycling machine which characterized in that:
comprises a main pressure regulating valve, an upper gas path and a lower gas path which are connected with the main pressure regulating valve;
the main pressure regulating valve comprises a valve body, a valve cover, a piston, an air inlet and an air outlet;
a sealing ring is arranged between the valve cover and the valve body, and a moving body and a fixed body are sequentially arranged below the valve cover;
the piston passes through the valve cover from top to bottom, is connected with the valve cover in a sealing way, is fixedly connected with the moving body, and finally passes through the fixed body and is movably connected with the fixed body;
the movable valve is arranged at the movable connection part of the fixed body and the piston;
an upper cavity is formed between the valve cover and the movable body, an intermediate cavity is formed between the movable body and the fixed body, and a lower cavity is formed between the fixed body and the bottom of the valve body;
the air inlet is positioned at the lower cavity, and the air outlet is positioned at the middle cavity;
the bottom of the valve body is provided with a compression nut which is connected with the bottom of the piston, and the connecting part is provided with an elastomer;
the upper gas circuit is provided with a micro pressure regulating valve and an electromagnetic gas bypass valve and is connected with the upper part of the valve body through the electromagnetic gas bypass valve;
the lower gas path is directly connected with a gas inlet below the valve body.
2. The pressure regulating device special for a screw compressor BOG recycling machine as set forth in claim 1, wherein: and the upper gas path is provided with a micro pressure regulating valve and an electromagnetic gas bypass valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321506906.1U CN219954346U (en) | 2023-06-14 | 2023-06-14 | Special pressure regulating device of screw compressor BOG recycling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321506906.1U CN219954346U (en) | 2023-06-14 | 2023-06-14 | Special pressure regulating device of screw compressor BOG recycling machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219954346U true CN219954346U (en) | 2023-11-03 |
Family
ID=88548835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321506906.1U Active CN219954346U (en) | 2023-06-14 | 2023-06-14 | Special pressure regulating device of screw compressor BOG recycling machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219954346U (en) |
-
2023
- 2023-06-14 CN CN202321506906.1U patent/CN219954346U/en active Active
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