CN2742245Y - Negative pressure valve - Google Patents
Negative pressure valve Download PDFInfo
- Publication number
- CN2742245Y CN2742245Y CN 200420107886 CN200420107886U CN2742245Y CN 2742245 Y CN2742245 Y CN 2742245Y CN 200420107886 CN200420107886 CN 200420107886 CN 200420107886 U CN200420107886 U CN 200420107886U CN 2742245 Y CN2742245 Y CN 2742245Y
- Authority
- CN
- China
- Prior art keywords
- hole
- screw rod
- water inlet
- valve
- sealing plate
- 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 - Lifetime
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- Lift Valve (AREA)
Abstract
The utility model relates to a negative pressure valve which comprises a valve body, a valve cover and an opening device, wherein, a water inlet and a water outlet are arranged in the valve body and connected with each other via a lower hole; the opening device comprises a screw, wherein, the screw is penetrated through the valve cover and extends into the water inlet, the screw is connected with the valve cover by screw threads, and a lower hole sealing board which is matched with the lower hole is fixedly connected to the lower end part of the screw; a partition board is arranged in the water inlet, the water inlet is divided into an upper and a lower hollow chambers by the partition board, an upper hole which is communicated with the upper and the lower hollow chambers is arranged in the partition board, the screw is penetrated through the upper hole, and a lower hole sealing board is positioned in the lower hollow chamber; the upper hole sealing board which is matched with the upper hole is fixedly connected to the middle part of the screw, and the upper hole sealing board is positioned in the upper hollow chamber; the section area of the upper hole is matched with the section area of the lower hole. The utility model provides a negative pressure valve having the advantages of convenience, quick opening, high requirement of machining precision and high requirement of materials.
Description
(1) technical field
The utility model relates to a kind of negative pressure valve.
(2) background technique
The Chinese patent publication number is CN1307192A, the model utility name is called the utility model patent of negative pressure valve, a kind of negative pressure valve is disclosed, comprise valve gap, step in the screw rod, sliding ring, the water inlet, valve body, sealing plate, the floating block seal ring, release aperture and osculum, sliding ring is enclosed within and is positioned at valve gap on the screw rod, step bottom in the screw rod, the screw rod bottom is provided with sealing plate, the floating block seal ring be arranged on sealing plate between the sealing surface, sealing plate the center line of ostium excurrens of center line and floating block seal ring on same straight line, the water inlet is positioned at the right-hand member or the left end of screw rod bottom, and osculum is positioned at the bottom of floating block seal ring.Also the shortcoming of Cun Zaiing is: 1, when Open valve, owing at first flow out from the release aperture, wait the floating block seal ring to separate along screw rod with sealing surface and upwards float, ability complete opening valve; When throttle down, screw rod is rotated down pushing together with sealing plate along valve gap, screw rod connecting thread, sealing plate sealing floating block seal ring and floating seal ring ostium excurrens, and Open valve speed is slow and cumbersome; 2, sliding ring need seal simultaneously to the lower wall of inboard upper wall of valve gap and screw flight section, and floating block seal ring and valve body, sealing plate seal with between the floating block seal ring, and sealing technology requires high, requirement on machining accuracy height, material requirements height.
(3) summary of the invention
For overcome in the prior art negative pressure valve Open valve speed slow, open trouble, requirement on machining accuracy height, the high deficiency of material requirements, the utility model provides a kind of and can convenient, fastly open, requirement on machining accuracy height, the high negative pressure valve of material requirements.
The technological scheme that its technical problem that solves the utility model adopts is:
A kind of negative pressure valve, comprise valve body, valve gap, opening device, be provided with water inlet, osculum in the described valve body, passing through down between this water inlet and the osculum, the hole connects, described opening device comprises screw rod, and described screw rod passes valve gap and extend in the water inlet, is threaded between screw rod and the valve gap, the affixed hole sealing plate down in the underpart of described screw rod, described hole sealing plate down is with hole cooperation down; Be provided with dividing plate in the described water inlet, described dividing plate is divided into upper and lower cavity with the water inlet, is provided with the last hole that is communicated with upper and lower cavity in the described dividing plate, and described screw rod passes described last hole, and described hole sealing plate down is positioned in the following cavity; The affixed hole sealing plate of going up in the middle part of described screw rod, the described hole sealing plate of going up cooperates with last hole, and the described hole sealing plate of going up is positioned in the upper plenum; The sectional area in described upward hole is adaptive with the sectional area in following hole.
Further, the described hole sectional area of going up equals hole sectional area down.
Further again, be provided with Sealing between screw rod and the valve gap.
Working mechanism of the present utility model is: when Open valve, the water in the intake pipe has certain hydraulic pressure, this hydraulic pressure to following hole sealing plate pressure and last hole sealing plate pressure identical, cancel out each other, during unlatching as long as upwards rotating screw bolt can upwardly open valve; When throttle down, because the hydraulic pressure of water inlet own has downward pressure to following hole sealing plate, can downward throttle down as long as rotate screw rod.
The beneficial effects of the utility model mainly show: 1, whole valve opening and closing is quick and easy; 2, whole valve only has the sealing surface between last hole sealing plate and the dividing plate, the sealing surface between following hole sealing plate and the valve body, and sealing technology requires simple, and requirement on machining accuracy is low; 3, whole valve mechanism is simple, cost is lower; 4, go up the hole sealing plate pressure and following hole sealing plate pressure cancel out each other, be particularly suitable for occasion at high pressure valve, when the sectional area in last hole and following hole is identical, can realize zero start, needing only very little driving force just can Open valve; 5, the valve body opening device is stressed little, as long as the material of valve body and valve gap meets fitness for purpose, and the low high pressure valve that can make all size of the material requirements of valve body, applicability is good.
(4) description of drawings
Fig. 1 is the cut-away view of negative pressure valve.
(5) embodiment
Below in conjunction with accompanying drawing the utility model is further described.
Embodiment 1
With reference to Fig. 1, a kind of negative pressure valve, comprise valve body 1, valve gap 2, opening device, be provided with the water inlet 3, the osculum 4 that have external connection screw in the described valve body 1, passing through down between this water inlet 3 and the osculum 4, hole 5 connects, described opening device comprises screw rod 6, described screw rod 6 passes valve gap 2 and extend in the water inlet 3, be threaded between screw rod 6 and the valve gap 2, the upper end portion of screw rod 6 is equipped with handwheel, the affixed hole sealing plate 7 down in the underpart of described screw rod 6, described hole sealing plate 7 down cooperates with following hole 5; Be provided with dividing plate 8 in the described water inlet 3, dividing plate 8 is divided into upper plenum 9, following cavity 10 with the water inlet, be provided with the last hole 11 that is communicated with upper plenum 9, following cavity 10 in the dividing plate 8, described screw rod 6 passes the described hole 11 of going up, and described hole sealing plate 7 down is positioned at cavity 10 down; The affixed hole sealing plate 12 of going up in the middle part of screw rod 6, the described hole sealing plate 12 of going up cooperates with last hole 11, and the described hole sealing plate 12 of going up is positioned at upper plenum 9; The sectional area in described upward hole 11 is adaptive with the sectional area in following hole 5, and the described sectional area of going up hole 11 equals the sectional area in hole 12 down.Be provided with Sealing 13 between screw rod 6 and the valve gap 2.
Working procedure of the present utility model is: when Open valve, water in the water inlet 3 has certain hydraulic pressure, this hydraulic pressure is identical with the pressure of last hole sealing plate 12 to the pressure of following hole sealing plate 7, cancels out each other, and needing only upwards during unlatching, rotating screw bolt 6 can upwardly open valve; When throttle down, because the hydraulic pressure of water inlet 3 own has downward pressure to following hole sealing plate 7, can downward throttle down as long as rotate screw rod 6.
Embodiment 2
A kind of negative pressure valve comprises valve body 1, valve gap 2, opening device, is provided with the water inlet 3, the osculum 4 that have flange connector in the described valve body 1, and other structures and embodiment 1 are together.
The working procedure of present embodiment is identical with embodiment 1.
Claims (3)
1, a kind of negative pressure valve, comprise valve body, valve gap, opening device, be provided with water inlet, osculum in the described valve body, passing through down between this water inlet and the osculum, the hole connects, described opening device comprises screw rod, and described screw rod passes valve gap and extend in the water inlet, is threaded between screw rod and the valve gap, the affixed hole sealing plate down in the underpart of described screw rod, described hole sealing plate down is with hole cooperation down; It is characterized in that:
Be provided with dividing plate in the described water inlet, described dividing plate is divided into upper and lower cavity with the water inlet, is provided with the last hole that is communicated with upper and lower cavity in the described dividing plate, and described screw rod passes described last hole, and described hole sealing plate down is positioned in the following cavity;
The affixed hole sealing plate of going up in the middle part of described screw rod, the described hole sealing plate of going up cooperates with last hole,
The described hole sealing plate of going up is positioned in the upper plenum;
The sectional area in described upward hole is adaptive with the sectional area in following hole.
2, negative pressure valve as claimed in claim 1 is characterized in that: the described hole sectional area of going up equals hole sectional area down.
3, negative pressure valve as claimed in claim 1 or 2 is characterized in that: be provided with Sealing between described screw rod and the valve gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420107886 CN2742245Y (en) | 2004-10-26 | 2004-10-26 | Negative pressure valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420107886 CN2742245Y (en) | 2004-10-26 | 2004-10-26 | Negative pressure valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2742245Y true CN2742245Y (en) | 2005-11-23 |
Family
ID=35477714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420107886 Expired - Lifetime CN2742245Y (en) | 2004-10-26 | 2004-10-26 | Negative pressure valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2742245Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100436898C (en) * | 2004-10-25 | 2008-11-26 | 刘智仁 | Negative pressure valve |
-
2004
- 2004-10-26 CN CN 200420107886 patent/CN2742245Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100436898C (en) * | 2004-10-25 | 2008-11-26 | 刘智仁 | Negative pressure valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20081126 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |