CN207246089U - A kind of Multi-level water sealing device of adjustable pressure difference - Google Patents
A kind of Multi-level water sealing device of adjustable pressure difference Download PDFInfo
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- CN207246089U CN207246089U CN201721144151.XU CN201721144151U CN207246089U CN 207246089 U CN207246089 U CN 207246089U CN 201721144151 U CN201721144151 U CN 201721144151U CN 207246089 U CN207246089 U CN 207246089U
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Abstract
The utility model discloses a kind of Multi-level water sealing device of adjustable pressure difference, solves the problems, such as that the water-column present in the water seal arrangement of fixed water-column adjusts difficulty and do not adapt to various external environment changes.Being included in upstream has pressure vessel（1）With downstream vacuum container（2）Between be provided with n grades of water seal cylinders（3）, every level-one water seal cylinder in n grades of water seal cylinders（4）On be respectively provided with air inlet（5）, lower gas outlet（6）With upper gas outlet（7）, in lower gas outlet（6）On be provided with gas circuit Shuttoff Valve（8）, the air inlet on first order water seal cylinder has pressure vessel with upstream（1）Connect, the upper gas outlet on first order water seal cylinder is connected with the air inlet on second level water seal cylinder, and the gas circuit Shuttoff Valve set on the lower gas outlet set on first order water seal cylinder is connected with the air inlet on second level water seal cylinder.The apparatus structure is simple, and control is easy, can be adjusted within the specific limits by pressure difference to adapt to the change of upstream and downstream pressure difference.
Description
Technical field
The present invention relates to a kind of Multi-level water sealing device, more particularly to a kind of upstream of water seal arrangement is operating pressure about 1
The water container of standard atmospheric pressure, the downstream of water seal arrangement is the Multi-level water sealing device of vacuum tank, close suitable for power plant's feed pump
Water shutoff backwater is to condenser；Gland heater is hydrophobic to condenser；Heating condensed water returns the occasions such as condenser, while also can be at it
It needs to use in the system of water seal arrangement.
Background technology
In thermal power plant, Sealing Water for Feedwater Pump backwater generally uses water seal arrangement into condenser, which is to utilize water
Envelope head difference balances the pressure difference between two containers, meanwhile, the gas in two containers is carried out using the water column in water seal arrangement every
From.Existing Multi-level water sealing device is the water seal arrangement that water-column is fixed using conventional fixed sum of series, and water-column is fixed
Constant, its height value is determined by design department according to design condition.In actual use, set when equipment operating condition deviates
When enumeration is more, often leads to equipment and be difficult to work normally, show as hollow tolerance increase, the fluctuation of negative pressure system vacuum values sometimes
It is abnormal；Sometimes it is excessive to show as water resistance, blocked drain, the liquid level of water seal upstream container raises extremely.Equipment operating condition deviates
The phenomenon of design point it occur frequently that, such as：When the change of atmospheric pressure of device external environment, or during temperature Change, or condenser is true
Reciprocal of duty cycle adjust (especially air cooling unit) change when, or water seal upstream container operating air pressure change when, or water seal work liquid temperature
During degree change.The water seal arrangement that conventional fixed sum of series fixes water-column does not adapt to the change of above-mentioned condition, can cause to
Water pump Water entrained in lube oil emulsifies, and sealing water backwater is not smooth, and unit make-up water percentage is high；Condenser vacuum declines, and unit efficiency reduces
The problems such as, seriously affect the normal table operation of Multi-level water sealing device.
The content of the invention
The present invention provides a kind of Multi-level water sealing device of adjustable pressure difference, solves the water seal arrangement of fixed water-column
Existing water-column adjusts difficult, it is impossible to adapts to the technical problem of various use condition changes.
The present invention is to solve above technical problem by the following technical programs：
There are pressure vessel and downstream vacuum container in a kind of Multi-level water sealing device of adjustable pressure difference, including upstream, have in upstream
It is provided with n grades of water seal cylinders between pressure vessel and downstream vacuum container, is respectively set on every level-one water seal cylinder in n grades of water seal cylinders
Have air inlet, lower gas outlet and upper gas outlet, be provided with gas circuit Shuttoff Valve on lower gas outlet, on first order water seal cylinder into
Gas port has pressure vessel to be connected together with upstream, the upper gas outlet on first order water seal cylinder and the air inlet on second level water seal cylinder
It is connected together, on the gas circuit Shuttoff Valve set on the lower gas outlet set on first order water seal cylinder and second level water seal cylinder
Air inlet be connected together, the upper gas outlet on n-th grade of water seal cylinder is together with downstream vacuum reservoir, in n-th grade of water
The gas circuit Shuttoff Valve set on the lower gas outlet set in sealed tube is together with downstream vacuum reservoir.
Gas circuit Shuttoff Valve on water seal cylinders at different levels in n grades of water seal cylinders is in open mode or is off state.
There is the air pressure P in pressure vessel in upstream0For a standard atmospheric pressure.By increasing on the outlet of every grade of water seal cylinder
One gas circuit Shuttoff Valve and a bypass, allow every grade of water seal to realize water seal water pillar height by the opening and closing of gas circuit Shuttoff Valve
Two grades of adjustings of degree.For example, when gas circuit Shuttoff Valve is opened, P0= P1+ h1；When gas circuit Shuttoff Valve is closed, P0= P1+
h1+ h1 ’.Similarly, when all gas circuit Shuttoff Valves are switched on, total water seal height hAlways= h1+h2+…+hn；When all gas circuits
When Shuttoff Valve is all closed, total water seal height hAlways= h1+ h1 ’+h2+ h2 ’+…+hn+ hn ’.This n grades of water seal arrangement, can be with
Realize the adjusting switching of n+1 grades of water seal water-columns, and can complete to adjust online.It means that it especially suitable for
（P0- Pn）Numerical values recited change within the specific limits, or water temperature in water seal and density changed occasion often has
More preferable adaptability for working condition and air-tightness.
The present invention solves conventional multistage water seal, and water seal height is fixed, the problem of without pressure difference regulating power.The device knot
Structure is simple, easy for installation, and control is easy, can be adjusted within the specific limits by pressure difference to adapt to the change of upstream and downstream pressure difference,
Keep the stable operation of water seal.
Brief description of the drawings
Fig. 1 is the structure diagram of the present invention；
Fig. 2 is the structure diagram of whole gas circuit Shuttoff Valves of the present invention in the on-state.
Embodiment
The present invention is described in detail below in conjunction with the accompanying drawings：
There are pressure vessel 1 and downstream vacuum container 2 in a kind of Multi-level water sealing device of adjustable pressure difference, including upstream, in upstream
Have and n grades of water seal cylinders 3 are provided between pressure vessel 1 and downstream vacuum container 2, divide equally on every level-one water seal cylinder 4 in n grades of water seal cylinders
Air inlet 5, lower gas outlet 6 and upper gas outlet 7 are not provided with, and gas circuit Shuttoff Valve 8, the first order are provided with lower gas outlet 6
Air inlet on water seal cylinder has pressure vessel 1 to be connected together with upstream, the upper gas outlet on first order water seal cylinder and second level water
Air inlet in sealed tube is connected together, the gas circuit Shuttoff Valve set on the lower gas outlet set on first order water seal cylinder with
Air inlet on second level water seal cylinder is connected together, and the upper gas outlet on n-th grade of water seal cylinder is connected with downstream vacuum container 2
Together, the gas circuit Shuttoff Valve set on the lower gas outlet set on n-th grade of water seal cylinder is connected one with downstream vacuum container 2
Rise.
Gas circuit Shuttoff Valve 8 on water seal cylinders 4 at different levels in n grades of water seal cylinders is in open mode or is off shape
State.
There is the air pressure P in pressure vessel 1 in upstream0For a standard atmospheric pressure.
The upstream of water seal arrangement is the gland-sealing cooler having in pressure vessel, such as power plant, or open open to atmosphere pond,
Air pressure on its liquid level is P0；The downstream of water seal arrangement is vacuum tank, its air pressure inside is Pn, PnLess than P0.Multi-level water encapsulates
Put and be made of the n grades of adjustable water seals of identical single-stage, be made of per level-one water seal 1 water seal cylinder and 1 gas circuit Shuttoff Valve 8, when
When all gas circuit Shuttoff Valves 8 are all opened, the total liquid-column height h of water sealAlways= h1+h2+…+hn, i.e. water seal upstream and downstream container gas side
Operating pressure it is poor（P0- Pn）, its maximum permissible value is (h1+h2+…+hn)；When all gas circuit Shuttoff Valves 8 are all closed, water
Seal total liquid-column height hAlways= h1+ h1 ’+h2+ h2 ’+…+hn+ hn ’, i.e. the operating pressure of water seal upstream and downstream container gas side is poor
（P0- Pn）, its maximum permissible value is (h1+ h1 ’+h2+ h2 ’+…+hn+ hn ’)。
Claims (3)
1. there are pressure vessel in a kind of Multi-level water sealing device of adjustable pressure difference, including upstream（1）With downstream vacuum container（2）, upper
Trip has pressure vessel（1）With downstream vacuum container（2）Between be provided with n grades of water seal cylinders（3）, it is characterised in that in n grades of water seal cylinders
Per level-one water seal cylinder（4）On be respectively provided with air inlet（5）, lower gas outlet（6）With upper gas outlet（7）, in lower gas outlet（6）
On be provided with gas circuit Shuttoff Valve（8）, the air inlet on first order water seal cylinder has pressure vessel with upstream（1）It is connected together, the
Upper gas outlet on level-one water seal cylinder is connected together with the air inlet on second level water seal cylinder, is set on first order water seal cylinder
Lower gas outlet on the gas circuit Shuttoff Valve that sets be connected together with the air inlet on second level water seal cylinder, n-th grade of water seal cylinder
On upper gas outlet and downstream vacuum container（2）It is connected together, is set on the lower gas outlet set on n-th grade of water seal cylinder
Gas circuit Shuttoff Valve and downstream vacuum container（2）It is connected together.
2. the Multi-level water sealing device of a kind of adjustable pressure difference according to claim 1, it is characterised in that in n grades of water seal cylinders
Water seal cylinders at different levels（4）On gas circuit Shuttoff Valve（8）Or it is in open mode or is off state.
3. the Multi-level water sealing device of a kind of adjustable pressure difference according to claim 1, it is characterised in that there is pressure vessel in upstream
（1）In air pressure P0For a standard atmospheric pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721144151.XU CN207246089U (en) | 2017-09-07 | 2017-09-07 | A kind of Multi-level water sealing device of adjustable pressure difference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721144151.XU CN207246089U (en) | 2017-09-07 | 2017-09-07 | A kind of Multi-level water sealing device of adjustable pressure difference |
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| Publication Number | Publication Date |
|---|---|
| CN207246089U true CN207246089U (en) | 2018-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721144151.XU Active CN207246089U (en) | 2017-09-07 | 2017-09-07 | A kind of Multi-level water sealing device of adjustable pressure difference |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107542698A (en) * | 2017-09-07 | 2018-01-05 | 中国能源建设集团山西省电力勘测设计院有限公司 | A kind of Multi-level water sealing device of adjustable pressure difference |
-
2017
- 2017-09-07 CN CN201721144151.XU patent/CN207246089U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107542698A (en) * | 2017-09-07 | 2018-01-05 | 中国能源建设集团山西省电力勘测设计院有限公司 | A kind of Multi-level water sealing device of adjustable pressure difference |
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