CN201818855U - Pressure limiting valve - Google Patents
Pressure limiting valve Download PDFInfo
- Publication number
- CN201818855U CN201818855U CN2010205111065U CN201020511106U CN201818855U CN 201818855 U CN201818855 U CN 201818855U CN 2010205111065 U CN2010205111065 U CN 2010205111065U CN 201020511106 U CN201020511106 U CN 201020511106U CN 201818855 U CN201818855 U CN 201818855U
- Authority
- CN
- China
- Prior art keywords
- water
- cavity
- pressure
- valve seat
- inlet cavity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 166
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000007789 sealing Methods 0.000 abstract description 9
- 239000012528 membrane Substances 0.000 abstract description 6
- 238000001223 reverse osmosis Methods 0.000 description 3
- 239000008399 tap water Substances 0.000 description 3
- 235000020679 tap water Nutrition 0.000 description 3
- 230000000295 complement effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 239000002384 drinking water standard Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 210000003296 saliva Anatomy 0.000 description 1
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- Safety Valves (AREA)
Abstract
The utility model discloses a pressure limiting valve, which comprises a valve seat (02). A water inlet cavity (03), a water outlet cavity (14), and a pressure limiting assembly for controlling a water flow between the water inlet cavity (03) and the water outlet cavity (14) to be switched between two states of conduction and cutoff are arranged in the valve seat (02); the water inlet cavity (03) and the water outlet cavity (14) are respectively communicated with a water inlet (01) and a water outlet (12); a water sealing port (13) composed of a valve seat (02) main body is arranged between the water inlet cavity (03) and the water outlet cavity (14); a control rod (19) passing through the water sealing port (13) is also arranged in the valve seat (02); a pressure sensing membrane (15) of the pressure limiting assembly bears the water pressure of the water outlet cavity (14), the periphery of the pressure sensing membrane (15) is tightly pressed and fixed between the valve seat (02) and an upper cover (18), and a central part of the pressure sensing membrane (15) is sealed and fixed with a tail end of the control end (19) in the water outlet cavity (14); an air vent (17) is formed on a cover body of the upper cover (18); the water inlet cavity (03) is composed of the valve seat (02) and a cavity body formed by a sealing diaphragm (21) whose periphery is fixed between the valve seat (02) and a lower cover (05); a lower end of the control rod (19) located in the water inlet cavity (03) is provided with a water sealing cushion (20) for closing the water sealing port (13); a balance water cavity (08) composed of a lower cover (05) main body is located outside the water inlet cavity (03) in the lower cover (05) and corresponds to the lower part of the control rod (19); the balance water cavity (08) is communicated with the water outlet cavity (14); and a water sealing spring (07) is arranged in the balance water cavity (08) and has two ends acting on an inner wall.
Description
Technical field
The utility model relates to a kind of pressure-limit valve.
Background technique
Along with expanding economy, the trend that water resources situation worsens has appearred in many places, and shortage of water resources and pollution are more and more serious, and city dweller's drinking water safety problem highlights.At the secondary pollution problem of city tap-water and because source water pollutes the harmful matter that renews in tap water, more and more be that the domestic water purifying machine of core filter element enters huge numbers of families with the reverse osmosis membrane.Existing domestic water purifying machine is to be the core filter element with the reverse osmosis membrane, through after the multistage pretreatment and supercharging to tap water, enters reverse osmosis membrane unit again, the pure water that produces can meet the drinking water standard of developed country fully.
But the water outlet hydraulic pressure of the pressure-limit valve that is adopted in existing domestic water purifying machine increases with the increase of source water hydraulic pressure, and security and stability is lower, easily whole pure water machine system is caused damage; The big problem of valve vibrations when in addition, existing pressure-limit valve all also exists the pressure-limit valve valve body to carry out the switching of switching state in the water route.
The model utility content
Technical problem to be solved in the utility model provides a kind of pressure-limit valve valve body and carries out switching state less pressure-limit valve of valve vibrations when switching in the water route.
The technical scheme in the invention for solving the above technical problem is: pressure-limit valve, comprise valve seat, has water-inlet cavity in the valve seat, water chamber and control water-inlet cavity, current are logical between the water chamber, the pressure limiting assembly of disconnected two states conversion, water-inlet cavity, water chamber respectively with water intake, water outlet is connected, described water-inlet cavity, has the water shutoff mouth that constitutes by the valve seat body between the water chamber, also be provided with the controlling rod that passes this water shutoff mouth in the valve seat, the pressure-sensitive diaphragm periphery that the pressure limiting assembly bears water chamber hydraulic pressure is fixed between valve seat and loam cake, pressure-sensitive diaphragm central position and controlling rod are positioned at the end seal of water chamber to be fixed, the described cap body of going up is provided with gas port, described water-inlet cavity is fixed in the cavity that the seal dissepiment between valve seat and the lower cover forms by valve seat and periphery and constitutes, the lower end that controlling rod is positioned at water-inlet cavity has the water shutoff cushion that seals the water shutoff mouth, be positioned in the described lower cover outside the water-inlet cavity and and locate to have the balance water cavity that constitutes by the lower cover body corresponding to the below of controlling rod, described balance water cavity and water chamber are connected, be provided with the water shutoff spring in the described lower cover, the water shutoff both ends of the spring acts on the end of lower cover inwall and controlling rod respectively.
Further, the section area of described balance water cavity equates with the section area of water shutoff mouth.
Described water shutoff cushion and seal dissepiment are structure as a whole.
Also comprise the water shutoff base, described water shutoff cushion central position is sealingly fastened between water shutoff base and the lower end of controlling rod in water-inlet cavity, the water shutoff cushion and the seal dissepiment that are integrative-structure are socketed on water shutoff base surface, and described water shutoff both ends of the spring acts on the lower end of lower cover inwall and water shutoff base respectively.
In sum, the beneficial effects of the utility model are:
1, the utility model has adopted the balance water cavity to offset the active force of the hydraulic pressure of water-inlet cavity, water chamber to the controlling rod formation, and the water shutoff cushion that can reduce pressure-limit valve collides dynamics when the water shutoff mouth is sealed, to reduce the valve vibrations.
2, the water shutoff cushion of the utility model water-inlet cavity upper end sealing water shutoff mouth and the seal dissepiment of bottom are set to integrative-structure, the water shutoff cushion and the seal dissepiment that are integrative-structure have certain telescopic resilience, can be socketed on water shutoff base surface, seal dissepiment was not easy to sealing and fixing on the controlling rod or the problem on the water shutoff base when to have solved water shutoff cushion and seal dissepiment be split type.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
The corresponding component names of mark among the figure: 01, water intake, 02, valve seat, 03, water-inlet cavity, 04, seal ring, 05, lower cover, 06, the water shutoff base, 07, the water shutoff spring, 08, the balance water cavity, 09, water flow passage one, 10, seal ring, 11, water flow passage two, 12, water outlet, 13, water shutoff mouth, 14, water chamber, 15, pressure-sensitive diaphragm, 16, close pressure nut, 17, gas port, 18, loam cake, 19, controlling rod, 20, the water shutoff cushion, 21, seal dissepiment.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but mode of execution of the present utility model is not limited thereto.
Referring to shown in Figure 1, the pressure-limit valve of present embodiment comprises valve seat 02, has water-inlet cavity 03 in the valve seat 02, water chamber 14 and control water-inlet cavity 03, current are logical between the water chamber 14, the pressure limiting assembly of disconnected two states conversion, water-inlet cavity 03, water chamber 14 respectively with water intake 01, water outlet 12 is connected, described water-inlet cavity 03, has the water shutoff mouth 13 that constitutes by valve seat 02 body between the water chamber 14, also be provided with the controlling rod 19 that passes this water shutoff mouth 13 in the valve seat 02, water chamber 14 is fixed in the cavity that the pressure-sensitive diaphragm 15 between valve seat 02 and the loam cake 18 forms by valve seat 02 and periphery and constitutes, pressure-sensitive diaphragm 15 peripheries that the pressure limiting assembly bears water chamber 14 hydraulic pressure are fixed between valve seat 02 and loam cake 18, pressure-sensitive diaphragm 15 central positions and controlling rod 19 are positioned at the end seal of water chamber 14 to be fixed, its concrete means of fixation is as follows: the end that controlling rod 19 is positioned at water chamber 14 is a circular flat board, the dull and stereotyped intermediate portion of this circle has and is cylindrical projection, this cylindrical convex outer surface is provided with screw thread, and has the close pressure nut 16 that is complementary with this cylindrical body, close pressure nut 16 and cylindrical raised thread are adjustable to be connected and the lower end surface of close pressure nut 16 also is set to circular dull and stereotyped, this circle end dull and stereotyped and that controlling rod 19 is positioned at water chamber 14 is complementary or is identical, pressure-sensitive diaphragm 15 central positions then are fixed between above-mentioned two circular flat boards, described loam cake 18 lids are provided with gas port 17, this gas port 17 makes the cavity body in the loam cake 18 communicate with ambient atmosphere by gas port 17, described water-inlet cavity 03 is fixed in the cavity that the seal dissepiment 21 between valve seat 02 and the lower cover 05 forms by valve seat 02 and periphery and constitutes, the lower end that controlling rod 19 is positioned at water-inlet cavity 03 has the water shutoff cushion 20 that seals water shutoff mouth 13, the lower end that controlling rod 19 is positioned at water-inlet cavity 03 also is provided with the water shutoff base 06 that is threaded with this lower end, water shutoff cushion 20 is sealingly fastened between water shutoff base 06 and the lower end of controlling rod 19 in water-inlet cavity 03, and, described water shutoff cushion 20 is structure as a whole with seal dissepiment 21, the water shutoff cushion 20 that is integrative-structure has certain telescopic resilience with seal dissepiment 21, can be socketed on water shutoff base 06 surface, solve water shutoff cushion 20 and seal dissepiment 21 seal dissepiment 21 when split type and be not easy to sealing and fixing on the controlling rod or the problem on the water shutoff base.Be positioned in the described lower cover 05 outside the water-inlet cavity 03 and and locate to have the balance water cavity 08 that constitutes by lower cover 05 body corresponding to the below of controlling rod 19, described balance water cavity 08 is connected with water chamber 14, and the horizontal section area of balance water cavity 08 equates with the horizontal section area of water shutoff mouth 13.Be provided with water shutoff spring 07 in the described lower cover 05, water shutoff spring 07 two ends act on the lower end of lower cover 05 inwall and water shutoff base 06 respectively.
Pressure-limit valve working principle of the present utility model is as follows: because the water shutoff mouth equates with the horizontal cross-sectional area of balance water cavity, and the water chamber in the water shutoff mouth outside and balance water cavity are to connect mutually, therefore the hydraulic pressure of water-inlet cavity, water chamber equates the active force that controlling rod constitutes, and direction is opposite, can cancel out each other basically, therefore under the original state, the active force of water shutoff spring makes this pressure-limit valve be in the water shutoff state; In like manner, the controlling rod of this pressure-limit valve only water chamber hydraulic pressure to the cavity of the active force of pressure-sensitive diaphragm, loam cake in the air barometric pressure move back and forth under to the active force of pressure-sensitive diaphragm and of the acting in conjunction of water shutoff spring the active force of controlling rod; The suction booster that is provided with on water outlet connection water route is when moving, the hydraulic pressure of water chamber is negative pressure state, when being lower than normality barometric pressure certain value, barometric pressure overcomes in the water-inlet cavity hydraulic pressure and water shutoff spring to the active force of pressure-sensitive diaphragm to the active force of pressure-sensitive diaphragm, make controlling rod move down and leave the water shutoff mouth, thereby open the water route up to the water shutoff cushion; Owing to adopted the balance water cavity that equates with water shutoff saliva balance sectional area, the water pressure that makes controlling rod be subjected to is cancelled out each other basically, and the water shutoff cushion that can reduce pressure-limit valve collides dynamics when the water shutoff mouth is sealed, to reduce the valve vibrations.
As mentioned above, just can realize the utility model preferably.
Claims (4)
1. pressure-limit valve, comprise valve seat (02), has water-inlet cavity (03) in the valve seat (02), water chamber (14) and control water-inlet cavity (03), current are logical between the water chamber (14), the pressure limiting assembly of disconnected two states conversion, water-inlet cavity (03), water chamber (14) respectively with water intake (01), water outlet (12) is connected, described water-inlet cavity (03), has the water shutoff mouth (13) that constitutes by valve seat (02) body between the water chamber (14), also be provided with the controlling rod (19) that passes this water shutoff mouth (13) in the valve seat (02), pressure-sensitive diaphragm (15) periphery that the pressure limiting assembly bears water chamber (14) hydraulic pressure is fixed between valve seat (02) and loam cake (18), pressure-sensitive diaphragm (15) central position and controlling rod (19) are positioned at the end seal of water chamber (14) to be fixed, it is characterized in that, described loam cake (18) lid is provided with gas port (17), described water-inlet cavity (03) is fixed in the cavity formation that the seal dissepiment (21) between valve seat (02) and the lower cover (05) forms by valve seat (02) and periphery, the lower end that controlling rod (19) is positioned at water-inlet cavity (03) has the water shutoff cushion (20) that seals water shutoff mouth (13), be positioned in the described lower cover (05) outside the water-inlet cavity (03) and and locate to have the balance water cavity (08) that constitutes by lower cover (05) body corresponding to the below of controlling rod (19), described balance water cavity (08) is connected with water chamber (14), be provided with water shutoff spring (07) in the described balance water cavity (08), water shutoff spring (07) two ends act on the end of lower cover (05) inwall and controlling rod (19) respectively.
2. pressure-limit valve according to claim 1 is characterized in that, the horizontal section area of described balance water cavity (08) equates with the horizontal section area of water shutoff mouth (13).
3. pressure-limit valve according to claim 1 and 2 is characterized in that, described water shutoff cushion (20) is structure as a whole with seal dissepiment (21).
4. pressure-limit valve according to claim 3, it is characterized in that, also comprise water shutoff base (06), described water shutoff cushion (20) central position is sealingly fastened in water shutoff base (06) and controlling rod (19) is positioned between the lower end of water-inlet cavity (03), the water shutoff cushion (20) that is integrative-structure is socketed on water shutoff base (06) surface with seal dissepiment (21), and described water shutoff spring (07) two ends act on the lower end of lower cover (05) inwall and water shutoff base (06) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205111065U CN201818855U (en) | 2010-08-31 | 2010-08-31 | Pressure limiting valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205111065U CN201818855U (en) | 2010-08-31 | 2010-08-31 | Pressure limiting valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201818855U true CN201818855U (en) | 2011-05-04 |
Family
ID=43916807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205111065U Expired - Fee Related CN201818855U (en) | 2010-08-31 | 2010-08-31 | Pressure limiting valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201818855U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110397757A (en) * | 2019-08-05 | 2019-11-01 | 宁波川渡流体科技有限公司 | A kind of triple valve and its pure water machine system for being constituted of cutting off the water supply |
| WO2022022285A1 (en) * | 2020-07-30 | 2022-02-03 | 厦门优尔智能科技股份有限公司 | Pressure limiting valve applied to vacuum fresh-keeping machine |
-
2010
- 2010-08-31 CN CN2010205111065U patent/CN201818855U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110397757A (en) * | 2019-08-05 | 2019-11-01 | 宁波川渡流体科技有限公司 | A kind of triple valve and its pure water machine system for being constituted of cutting off the water supply |
| WO2022022285A1 (en) * | 2020-07-30 | 2022-02-03 | 厦门优尔智能科技股份有限公司 | Pressure limiting valve applied to vacuum fresh-keeping machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110504 Termination date: 20130831 |