CN203604749U - Pressure compensation structure - Google Patents
Pressure compensation structure Download PDFInfo
- Publication number
- CN203604749U CN203604749U CN201320780680.4U CN201320780680U CN203604749U CN 203604749 U CN203604749 U CN 203604749U CN 201320780680 U CN201320780680 U CN 201320780680U CN 203604749 U CN203604749 U CN 203604749U
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- China
- Prior art keywords
- valve
- channel
- water
- passage
- pressure
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- Expired - Lifetime
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 45
- 238000007789 sealing Methods 0.000 claims abstract description 11
- 208000002925 dental caries Diseases 0.000 claims description 4
- 239000002699 waste material Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 1
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Abstract
The utility model provides a pressure compensation structure. The pressure compensation structure comprises a shell, a water inlet valve, a water outlet valve, a drain valve and a main valve rod, wherein the water inlet valve, the water outlet valve, the drain valve and the main valve rod are located in the shell. The pressure compensation structure further comprises an elastic sealing device. The elastic sealing device divides the inside of the shell into a main cavity and a control cavity. The shell is provided with a channel I. The channel I enables the control cavity to be communicated with a water inlet or the main cavity. An outlet, at the water inlet or the main cavity, of the channel I is a communicating port. A valve plate on the water inlet valve seals the communicating port. When the valve plate is under pressure and water enters the communicating port, the communicating port is unsealed. The pressure compensation structure further comprises a channel II. The channel II enables the channel I to be communicated with an external pipeline of the valve plate of the water inlet valve. The pressure compensation structure has the advantages that by the adoption of the technical scheme, when pressure water passes through the water inlet at a high speed, a one-way valve is opened by the inlet pressure water, the pressure water enters the channel II and then enters the channel I since the channel II is communicated with the channel I, as a result, loss of the water volume in the channel I is compensated for, it is guaranteed that the pressure in the control cavity is stable, the drain valve is well controlled, and waste of water resources is avoided.
Description
Technical field
The invention relates to a kind of pressure compensation structure.
Background technique
Backflow preventer is in the past divided into main chamber and two cavitys of control chamber by flexible sheet by described enclosure interior, described housing is provided with passage, this passage is communicated with described control chamber with described water intake, valve plate on described inlet valve can seal this passage, deblocking in the time that valve plate pressurized is intake.Enter control chamber by liquid, and flexible sheet is formed to certain pressure, control thus the unlatching of drain valve.But in use, too fast when the water velocity by water intake, can produce certain suction to the original liquid in passage, cause the pressure transient of control chamber, can not control well drain valve, easily cause the waste of water resources.
Innovation and creation content
The object of the invention is to provide a kind of simple in structure, safe and reliable pressure compensation structure.
The technological scheme of the invention is: a kind of pressure compensation structure, comprise housing and the inlet valve, outlet valve, drain valve and the main valve stem that are positioned at described enclosure interior, also comprise elastic sealing device, described enclosure interior is divided into main chamber and two cavitys of control chamber by described elastic sealing device, wherein on the shell wall in main chamber, comprise these three openings of water intake, water outlet and discharge opening, described inlet valve, outlet valve and drain valve are arranged on respectively this three openings, one end of described main valve stem is connected with described drain valve, and the other end is connected with described elastic sealing device; Described housing is provided with passage I, described passage I is communicated with described control chamber with described water intake or main chamber, described passage I is connecting port in the outlet at described water intake or main chamber place, valve plate on described inlet valve seals described connecting port, deblocking in the time that valve plate pressurized is intake, is characterized in that: also comprise passage II, it is communicated with described passage I with the external pipe of described inlet valve valve plate, and in described passage II, one-way valve is housed, only allows passage I described in flow direction.
Advantage and good effect that the invention has are:
Owing to adopting technique scheme, when press water can produce Venturi effect during at a high speed by water intake, passage I is produced to suction, the press water in control chamber can flow out by passage I, causes control chamber pressure decreased; Simultaneously inlet pressure water is opened one-way valve inlet passage II, and because passage II is communicated with passage I, water passes through passage II inlet passage I, and with the water loss of compensation channel I, the pressure stability in assurance control chamber, controls drain valve well, avoids the waste of water resources.
Accompanying drawing explanation
Fig. 1 is the structural representation of the invention.
Embodiment
Below in conjunction with the drawings and the specific embodiments, the invention is described further.
As shown in Figure 1, the invention comprises housing and is positioned at inlet valve 11, outlet valve 1, drain valve 2 and the main valve stem 3 of described enclosure interior, also comprise elastic sealing device 4, described enclosure interior is divided into main chamber 5 and 6 two cavitys of control chamber by described elastic sealing device 4, wherein on the shell wall in main chamber 5, comprise water intake 7, water outlet 8 and discharge opening 9 these three openings, described inlet valve 11, outlet valve 1 and drain valve 2 are arranged on respectively this three openings, one end of described main valve stem 3 is connected with described drain valve 2, and the other end is connected with described elastic sealing device 4; Described housing is provided with passage I 10, described passage I 10 is communicated with described control chamber 6 with described water intake 7 or main chamber 5, described passage I 10 is connecting port in the outlet at described water intake 7 or 5 places, main chamber, valve plate on described inlet valve 11 seals described connecting port, deblocking in the time that valve plate pressurized is intake, also comprise passage II 12, it is communicated with described passage I 10 with the external pipe of described inlet valve 11 valve plates, and in described passage II 12, one-way valve is housed, only allows passage I 10 described in flow direction.
When press water can produce Venturi effect during at a high speed by water intake, passage I is produced to suction, the press water in control chamber can flow out by passage I, causes control chamber pressure decreased; Simultaneously inlet pressure water is opened one-way valve inlet passage II, and because passage II is communicated with passage I, water passes through passage II inlet passage I, and with the water loss of compensation channel I, the pressure stability in assurance control chamber, controls drain valve well, avoids the waste of water resources.
Above embodiment has been described in detail the invention, but described content is only for the preferred embodiment of the invention, can not be considered to the practical range for limiting the invention.All equalization variation and improvement etc. of doing according to the invention application range, within all should still belonging to the patent covering scope of the invention.
Claims (1)
1. a pressure compensation structure, comprise housing and the inlet valve (11) that is positioned at described enclosure interior, outlet valve (1), drain valve (2) and main valve stem (3), also comprise elastic sealing device (4), described enclosure interior is divided into main chamber (5) and (6) two cavitys of control chamber by described elastic sealing device (4), wherein on the shell wall of main chamber (5), comprise water intake (7), these three openings of water outlet (8) and discharge opening (9), described inlet valve (11), outlet valve (1) and drain valve (2) are arranged on respectively this three openings, one end of described main valve stem (3) is connected with described drain valve (2), the other end is connected with described elastic sealing device (4), described housing is provided with passage I (10), described passage I (10) is communicated with described control chamber (6) with described water intake (7) or main chamber (5), the outlet that described passage I (10) is located in described water intake (7) or main chamber (5) is connecting port, valve plate on described inlet valve (11) seals described connecting port, deblocking in the time that valve plate pressurized is intake, it is characterized in that: also comprise passage II (12), it is communicated with described passage I (10) with the external pipe of described inlet valve (11) valve plate, and in described passage II (12), one-way valve is housed, only allow passage I (10) described in flow direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320780680.4U CN203604749U (en) | 2013-11-28 | 2013-11-28 | Pressure compensation structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320780680.4U CN203604749U (en) | 2013-11-28 | 2013-11-28 | Pressure compensation structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203604749U true CN203604749U (en) | 2014-05-21 |
Family
ID=50717424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320780680.4U Expired - Lifetime CN203604749U (en) | 2013-11-28 | 2013-11-28 | Pressure compensation structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203604749U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107461509A (en) * | 2017-10-09 | 2017-12-12 | 铜陵天海流体控制股份有限公司 | A kind of high reliability elastic soft sealing gate valve |
-
2013
- 2013-11-28 CN CN201320780680.4U patent/CN203604749U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107461509A (en) * | 2017-10-09 | 2017-12-12 | 铜陵天海流体控制股份有限公司 | A kind of high reliability elastic soft sealing gate valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140521 |