CN218719054U - Positive and negative pressure protection valve - Google Patents
Positive and negative pressure protection valve Download PDFInfo
- Publication number
- CN218719054U CN218719054U CN202221329113.2U CN202221329113U CN218719054U CN 218719054 U CN218719054 U CN 218719054U CN 202221329113 U CN202221329113 U CN 202221329113U CN 218719054 U CN218719054 U CN 218719054U
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- China
- Prior art keywords
- pressure reducing
- reducing valve
- valve
- box body
- operating rod
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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Abstract
A positive and negative pressure protection valve comprises a box body, wherein a pressure reducing valve is arranged at the upper part in the box body, and a vacuum safety valve is arranged at the lower part in the box body; the pressure reducing valve comprises a pressure reducing valve body, the pressure reducing valve body is of a cylindrical structure with openings at the upper end and the lower end, the opening at the lower end of the pressure reducing valve body is a pressure reducing inlet, the opening at the upper end of the pressure reducing valve body is an exhaust port, and an exhaust channel is formed between the pressure reducing inlet and the exhaust port; the pressure reducing valve also comprises a pressure reducing valve cover cap which is arranged at a pressure reducing inlet at the lower end of the pressure reducing valve body, and the pressure reducing valve also comprises an operating rod; the top of the box body is provided with an exhaust through hole corresponding to the exhaust port. The utility model can control the discharge of the marsh gas through the action of the operating rod. The vacuum safety valve can be manually adjusted to release pressure. The utility model discloses a positive negative pressure protection is realized to relief pressure valve, vacuum relief valve's setting. When the biogas quantity is more than the biogas quantity, the utility model can automatically release the pressure. The vacuum safety valve can also prevent the methane tank or the box body from generating negative pressure.
Description
Technical Field
The utility model belongs to the valve, concretely relates to protection valve.
Background
Biogas is a secondary energy source and is a renewable energy source. Biogas is a combustible gas produced by the fermentation of various organic substances in the absence of air (reducing conditions) and at a suitable temperature and pH value by microorganisms.
When a biogas cogeneration unit or biogas purification equipment is damaged or needs to be maintained and biogas in a gas storage membrane cannot be used, and the biogas output is greater than the gas consumption, positive pressure, namely overpressure, can be gradually formed in the gas storage membrane, and when the pressure exceeds the expansion limit of the gas storage membrane, the gas storage membrane can be caused to burst; on the contrary, when the biogas production is less than the biogas usage due to some factors (bad weather, insufficient feeding, increase of rear-end gas equipment), the biogas pipeline, the gas storage device and the gas space in the biogas fermentation tank form negative pressure, and when the negative pressure reaches a certain degree, the gas storage device, the top of the biogas fermentation tank and the like collapse due to the failure of balancing the atmospheric pressure.
Therefore, it is necessary to design a protection valve to solve the above problems.
Disclosure of Invention
The utility model aims at overcoming the above-mentioned not enough of prior art, and provide a positive negative pressure protection valve, simple structure, security are high, with low costs.
The technical scheme of the utility model is that: comprises a box body, wherein a pressure reducing valve is arranged at the upper part in the box body, and a vacuum safety valve is arranged at the lower part in the box body; the pressure reducing valve comprises a pressure reducing valve body, the pressure reducing valve body is of a cylindrical structure with openings at the upper end and the lower end, the opening at the lower end of the pressure reducing valve body is a pressure reducing inlet, the opening at the upper end of the pressure reducing valve body is an exhaust port, and an exhaust passage is formed between the pressure reducing inlet and the exhaust port; the pressure reducing valve also comprises a pressure reducing valve cover cap which is arranged at a pressure reducing inlet at the lower end of the pressure reducing valve body, and the pressure reducing valve also comprises an operating rod which is used for driving the pressure reducing valve cover cap to lift so as to open/close the exhaust channel; the top of the box body is provided with an exhaust through hole corresponding to the exhaust port, and the side surface of the box body is provided with a connecting pipe used for connecting the methane tank.
When the operating rod moves upwards to drive the pressure reducing valve cover cap to be separated from the pressure reducing inlet, the exhaust channel is opened, and gas is exhausted through the exhaust channel; when the operating rod moves downwards to drive the pressure reducing valve cover to cover the pressure reducing inlet, the exhaust channel is closed; the containing cavity at the lower part of the inner cavity of the pressure reducing valve body contains pressure reducing valve sealing liquid for sealing the cover opening of the cover cap of the pressure reducing valve.
A circle of flange extending inwards along the axial direction is arranged at a pressure reducing opening at the lower end of the pressure reducing valve body, and the flange and the bottom end of the inner wall of the pressure reducing valve body are sealed by a circular plate to form an accommodating cavity; when the operating rod moves downwards to drive the pressure reducing valve cover cap to cover the pressure reducing inlet, the cover opening of the pressure reducing valve cover cap is sealed by the pressure reducing valve sealing liquid.
The vacuum safety valve comprises a safety valve seat, the safety valve seat is of a cylindrical structure with openings at the upper end and the lower end, and an air release channel is formed between the openings at the upper end and the lower end of the safety valve seat; the vacuum safety valve also comprises a safety valve cover cap which is arranged at an opening at the upper end of the safety valve seat, and the vacuum safety valve also comprises a guide rod which is used for driving the safety valve cover cap to lift so as to open/close the air release channel; the lower part in the box body is also provided with safety valve sealing liquid for sealing a cover opening of the safety valve cover; the bottom of the box body is provided with an assembling hole corresponding to the lower end opening of the vacuum safety valve.
And a heat insulation layer is covered outside the box body. The heat insulation layer is made of glass fiber or asbestos.
The end part of an operating rod positioned in the box body is connected with a pressure reducing valve cover cap, the middle part of the operating rod penetrates through the box body through a mounting hole on the box body, and the operating rod positioned outside the box body is an operating handle; the mounting hole on the box body is provided with a guide sleeve matched with the part of the operating rod positioned in the box body, and the guide sleeve is positioned in the box body.
A circle of upper retaining ring extending radially inwards is arranged at the upper end of the guide sleeve, and an upper abdicating hole of the abdicating operating rod is formed in the middle of the upper retaining ring; the lower port of the guide sleeve is arranged on a sealing ring, and the operating rod is sleeved on the inner ring of the sealing ring.
The upper abdicating hole is in clearance fit with the operating rod, the operating rod is in clearance fit with the inner cavity of the guide sleeve, and the operating rod is movably connected with the inner ring of the sealing ring in a sealing manner. The operating rod moves up and down, and the internal sealing liquid can not flow out.
A flange pipe fitting for connecting an exhaust pipe is arranged at the exhaust through hole; and the upper end opening of the pressure reducing valve and the lower end opening of the vacuum safety valve are both provided with flange structures connected with the box body.
The vacuum safety valve is connected with the assembling hole in a sealing mode, and a sealing rubber ring is arranged at the position of the vacuum safety valve and the assembling hole.
The utility model can control the discharge of the marsh gas through the action of the operating rod. The vacuum safety valve can be manually adjusted to release pressure. The utility model discloses a positive negative pressure protection is realized to relief pressure valve, vacuum relief valve's setting. When the biogas quantity is more than the biogas quantity, the utility model can automatically release the pressure. The vacuum safety valve can also prevent the methane tank or the box body from generating negative pressure.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a cross-sectional view of FIG. 1;
FIG. 3 is a schematic view of the relief valve at the relief inlet;
fig. 4 is a schematic structural diagram of the safety valve sealing liquid installed at the lower part of the box body of the present invention.
Detailed Description
In fig. 1 to 4, a pressure reducing valve 1 is installed in an upper portion of a tank 101. The pressure reducing valve 1 comprises a pressure reducing valve body, the pressure reducing valve body is of a cylindrical structure with openings at the upper end and the lower end, an opening at the lower end of the pressure reducing valve body is a pressure reducing inlet, and an opening at the upper end of the pressure reducing valve body is an exhaust port. The pressure reducing valve cover 6 is arranged at a pressure reducing inlet at the lower end of the pressure reducing valve body, an exhaust through hole is formed in the top of the box body 101 corresponding to the exhaust port, and a flange pipe fitting 5 used for connecting an exhaust pipe is arranged at the exhaust through hole; the side surface of the box body 101 is provided with a connecting pipe 7 for connecting the methane tank. The operating rod 11 drives the pressure reducing valve cover 6 to move upwards until the pressure reducing valve cover 6 is separated from the pressure reducing inlet, so that air can be exhausted. The operating rod 11 drives the reducing valve cover 6 to move downwards until the reducing valve cover 6 falls on the reducing inlet, the opening of the reducing valve cover 6 is sealed by the reducing valve sealing liquid 3 in the accommodating cavity 181, the exhaust through hole can be closed, and methane leakage is prevented. The end part of an operating rod 11 positioned in the box body is connected with the pressure reducing valve cover 6, and the middle part of the operating rod 11 penetrates through the box body through a mounting hole on the box body. The guide sleeve 112 matched with the part of the operating rod 11 positioned in the box body is arranged at the mounting hole on the box body, and the guide sleeve 112 is positioned in the box body. A circle of upper retaining ring 114 which extends radially inwards is arranged at the upper port of the guide sleeve 112, and a sealing ring 113 is arranged at the lower port of the guide sleeve 112. The guide of the operating lever 11 through the guide sleeve 112 prevents the operating lever body from shifting. A circle of flange 182 extending inwards along the axial direction is arranged at the pressure reducing opening at the lower end of the pressure reducing valve body, and the flange 182 and the bottom end of the inner wall of the pressure reducing valve body form an accommodating cavity 181 through a circular plate back cover 184. The upper abdicating hole is in clearance fit with the operating rod 11, the operating rod 11 is in clearance fit with the inner cavity of the guide sleeve 112, the operating rod 11 is movably connected with the inner ring of the sealing ring 113 in a sealing manner, the operating rod 11 is guaranteed to move up and down, and sealing liquid cannot leak out.
The vacuum safety valve 9 is arranged at the lower part in the box body 101, the vacuum safety valve 9 comprises a safety valve seat, a safety valve cover 8 and a guide rod 10, and the safety valve cover 8 is arranged at an opening at the upper end of the safety valve seat. The lower part in the box body 101 is also provided with safety valve sealing liquid 4, and the bottom of the box body 101 is provided with an assembling hole corresponding to the lower end opening of the vacuum safety valve 9. And a sealing rubber ring is arranged at the position of the vacuum safety valve 9 and the assembling hole.
When in use, when the pressure in the methane tank or the positive and negative pressure protection device case body exceeds a critical value: on the one hand, the pressure relief valve cover 6 in the pressure relief valve 1 rises, allowing gas to escape; on the other hand, the guide rod 10 of the vacuum safety valve 9 is manually pushed, so that the safety valve cover 8 is lifted to be separated from the upper end opening of the vacuum safety valve 9, and the gas can also flow to the lower end opening of the vacuum safety valve 9 through the upper end opening of the vacuum safety valve 9 and then flow to the assembly hole at the bottom of the box body 101, thereby realizing pressure relief. If the pressure in the tank body of the methane tank or the positive and negative pressure protection device is lower than the set limit, the pressure reducing valve cover 6 falls on the pressure reducing inlet to prevent methane or gas leakage. On the other hand, if the pressure in the methane tank or the positive and negative pressure protection device box body is lower than the set limit, the safety valve cover 8 of the vacuum safety valve 9 rises to allow air to flow in, so as to prevent the methane tank or the box body from generating negative pressure. In normal operation, the relief inlet of the relief valve is sealed by the relief valve sealing liquid 3, and the relief valve cover 8 is sealed by the relief valve sealing liquid 4.
The positive and negative pressure protector can give a threshold signal set by positive pressure or negative pressure, and when the positive pressure is exceeded, whether the following biogas equipment (a generator set, purification equipment, a boiler or a torch) works, the protective rope can be pulled to release biogas through the gas release channel when the excessive pressure is generated and exceeds the set threshold, which is the last safety guarantee.
Once negative pressure is formed in the methane tank, a certain set negative pressure value is achieved, the pressure sensor on the box body 101 sends a signal to a control system of a following gas-using device or sends a signal through the pressure sensor and the signal is collected by the methane production control cabinet and then sent to the control system of the following gas-using device, then the control system of the rear-end gas-using device can immediately stop a booster fan of a generator set, namely, the gas is not pumped into the generator set any more, or purification equipment is used, and the gas-using device is also stopped at the same time. Thus, no further negative pressure or larger negative pressure is generated, otherwise, the atmospheric pressure can collapse the gas storage film and the top of the whole methane tank, and larger loss is caused.
Claims (10)
1. A positive and negative pressure protection valve is characterized in that: comprises a box body (101), wherein a pressure reducing valve (1) is arranged at the upper part in the box body (101), and a vacuum safety valve (9) is arranged at the lower part in the box body (101); the pressure reducing valve (1) comprises a pressure reducing valve body, the pressure reducing valve body is of a cylindrical structure with openings at the upper end and the lower end, the opening at the lower end of the pressure reducing valve body is a pressure reducing inlet, the opening at the upper end of the pressure reducing valve body is an exhaust port, and an exhaust channel is formed between the pressure reducing inlet and the exhaust port; the pressure reducing valve (1) further comprises a pressure reducing valve cover cap (6), the pressure reducing valve cover cap (6) is arranged at a pressure reducing inlet at the lower end of the pressure reducing valve body, and the pressure reducing valve (1) further comprises an operating rod (11) which is used for driving the pressure reducing valve cover cap (6) to lift so as to open/close the exhaust channel; the top of the box body (101) is provided with an exhaust through hole corresponding to the exhaust port.
2. The positive and negative pressure protection valve of claim 1, wherein: when the operating rod (11) moves upwards to drive the pressure reducing valve cover (6) to be separated from the pressure reducing inlet, the exhaust channel is opened, and gas is exhausted through the exhaust channel; when the operating rod (11) moves downwards to drive the pressure reducing valve cover cap (6) to cover the pressure reducing inlet, the exhaust channel is closed; the containing cavity (181) at the lower part of the inner cavity of the pressure reducing valve body contains pressure reducing valve sealing liquid (3) used for sealing the cover opening of the pressure reducing valve cover cap (6).
3. The positive and negative pressure protection valve of claim 2, wherein: a circle of flange (182) extending inwards along the axial direction is arranged at a pressure reducing port at the lower end of the pressure reducing valve body, and the flange (182) and the bottom end of the inner wall of the pressure reducing valve body form an accommodating cavity (181) through a circular plate sealing bottom (184); when the operating rod (11) moves downwards to drive the pressure reducing valve cover cap (6) to cover the pressure reducing inlet, the cover opening of the pressure reducing valve cover cap (6) is sealed by the pressure reducing valve sealing liquid (3).
4. The positive and negative pressure protection valve of claim 1, wherein: the vacuum safety valve (9) comprises a safety valve seat, the safety valve seat is of a cylindrical structure with openings at the upper end and the lower end, and an air release channel is formed between the openings at the upper end and the lower end of the safety valve seat; the vacuum safety valve (9) also comprises a safety valve cover cap (8), the safety valve cover cap (8) is arranged at an opening at the upper end of a safety valve seat, and the vacuum safety valve (9) also comprises a guide rod (10) which is used for driving the safety valve cover cap (8) to lift so as to open/close the air leakage channel; the lower part in the box body (101) is also provided with safety valve sealing liquid (4) for sealing the cover opening of the safety valve cover (8).
5. The positive and negative pressure protection valve of claim 1, wherein: the box body (101) is covered with a heat insulation layer.
6. The positive and negative pressure protection valve of claim 1, wherein: the end part of an operating rod (11) positioned in the box body is connected with a pressure reducing valve cover (6), the middle part of the operating rod (11) penetrates through the box body through a mounting hole on the box body, and the operating rod (11) positioned outside the box body is an operating handle; a guide sleeve (112) matched with the part of the operating rod (11) in the box body is arranged at the mounting hole on the box body (101), and the guide sleeve (112) is positioned in the box body (101).
7. The positive and negative pressure protection valve of claim 6, wherein: a circle of upper retaining ring (114) extending radially inwards is arranged at the upper end of the guide sleeve (112), and an upper abdicating hole of the abdicating operating rod (11) is formed in the middle of the upper retaining ring; the lower port of the guide sleeve (112) is provided with a sealing ring (113), and the operating rod (11) is sleeved on the inner ring of the sealing ring (113).
8. The positive and negative pressure protection valve of claim 7, wherein: the upper abdicating hole is in clearance fit with the operating rod (11), the operating rod (11) is in clearance fit with the inner cavity of the guide sleeve (112), and the operating rod (11) is movably connected with the inner ring of the sealing ring (113) in a sealing manner.
9. The positive and negative pressure protection valve of claim 1, wherein: a flange pipe fitting (5) for connecting an exhaust pipe is arranged at the exhaust through hole; the upper end opening of the pressure reducing valve (1) and the lower end opening of the vacuum safety valve (9) are both provided with flange structures connected with the box body.
10. The positive and negative pressure protection valve of claim 1, wherein: the vacuum safety valve (9) is connected with the assembling hole in a sealing way.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221329113.2U CN218719054U (en) | 2022-05-30 | 2022-05-30 | Positive and negative pressure protection valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221329113.2U CN218719054U (en) | 2022-05-30 | 2022-05-30 | Positive and negative pressure protection valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218719054U true CN218719054U (en) | 2023-03-24 |
Family
ID=85607070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221329113.2U Active CN218719054U (en) | 2022-05-30 | 2022-05-30 | Positive and negative pressure protection valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218719054U (en) |
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2022
- 2022-05-30 CN CN202221329113.2U patent/CN218719054U/en active Active
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