CN111851656B - Ground fire water tank - Google Patents
Ground fire water tank Download PDFInfo
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- CN111851656B CN111851656B CN202010757766.XA CN202010757766A CN111851656B CN 111851656 B CN111851656 B CN 111851656B CN 202010757766 A CN202010757766 A CN 202010757766A CN 111851656 B CN111851656 B CN 111851656B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 228
- 230000000087 stabilizing effect Effects 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 6
- 230000005484 gravity Effects 0.000 claims description 5
- 230000001960 triggered effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B11/00—Arrangements or adaptations of tanks for water supply
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B11/00—Arrangements or adaptations of tanks for water supply
- E03B11/10—Arrangements or adaptations of tanks for water supply for public or like main water supply
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B11/00—Arrangements or adaptations of tanks for water supply
- E03B11/10—Arrangements or adaptations of tanks for water supply for public or like main water supply
- E03B11/12—Arrangements or adaptations of tanks for water supply for public or like main water supply of high-level tanks
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
The invention provides a ground fire-fighting water tank, which can avoid arranging a pump room underground on the premise of meeting requirements through a siphon principle, a water inlet pipeline of the water tank is connected from the upper part of the water tank, a water taking pipeline is separated from water in the water tank through air, so that a negative pressure environment is formed between the water inlet pipeline and the water in the water tank, the common fire-fighting pump is arranged above a water tank, the pump room does not need to be excavated beside the water tank, the leakage risk in the later operation period does not exist, compared with a long-shaft pump, the position of the fire-fighting pump can be flexibly arranged on a plane after the equipment is adopted, the equipment is not limited by the position of a fire-fighting water tank, and the utilization rate of the fire-fighting water tank is obviously improved.
Description
Technical Field
The invention relates to the technical field of fire-fighting water tanks, in particular to a ground fire-fighting water tank.
Background
According to the standard, the fire pump can meet the self-filling water absorption requirement, and two design schemes are generally adopted for the fire pump of an underground fire pool:
as shown in figure 1, the underground fire pump house is synchronously arranged, in order to ensure the effective utilization rate of a fire pool, the depth of the underground fire pump house is not less than the depth of the pool, the scheme needs to carry out foundation pit excavation in the construction of the underground fire pump house, the general excavation depth can reach 5m, and the scheme has the risk of pump house leakage during the subsequent operation of a high water level area.
As shown in figure 2, for the underground fire pump which can not be arranged on site, the design scheme of the axial-flow deep-well pump can be adopted, the axial-flow deep-well pump can only be arranged right above the water pool due to the construction reason, the plane arrangement is influenced by the position of the water pool, the effective utilization water level is high, and the effective utilization volume of the fire-fighting water pool is low.
Disclosure of Invention
The invention aims to provide a ground fire-fighting water tank, which aims to solve the problems that an underground fire-fighting pump in the prior art has leakage of a pump room and is low in effective utilization volume, the pump room is built without excavating beside a water pool, the leakage risk in the subsequent operation period does not exist, and the utilization rate of a fire-fighting water pool is improved.
In order to achieve the above technical object, the present invention provides a ground fire water tank, comprising:
the system comprises a water tank, a fire pump, a pressure stabilizing pump and a vacuum pump;
the water tank is arranged on the ground above the fire pool, a water inlet pipe is arranged above the water tank, and the water inlet pipe is connected to the fire pool and extends into the dead water level of the fire pool;
the water outlet of the water tank is connected with a fire pump and a pressure stabilizing pump, and when the fire pump works, a negative pressure environment is formed in the water tank;
the vacuum pump is arranged above the water tank, and when the water level in the water tank is lower than the lowest water level, the vacuum pump is controlled to be started through the liquid level sensor, so that a negative pressure environment is formed in the water tank.
Preferably, the minimum water level is set to prevent pump operation under the most adverse conditionsThe most adverse condition is that the water surface of the fire pool is at the height of the dead water level, namely vertical L1The water inlet pipe is completely dehydrated and filled with gas.
Preferably, fire pump during operation, the inlet tube is taken out with the gas in the water tank with the form of little bubble dissolve gradually in aqueous when drawing water, is taken away by the fire pump, and vacuum can be bigger and bigger in the water tank in the actual work, and the factor of safety that self-priming formula required is also bigger and bigger.
Preferably, the volume of the water tank should satisfy the following condition:
V1＝S1*h2≥K(S1*d2+VS2)
VS1＝V1-V2＝S1*h1
wherein Q is the water yield of the water pump during operation, i is the hydraulic gradient along the way, P1At minimum air pressure, P0Is atmospheric pressure, gamma is the water gravity, ChIs a high Williams coefficient of Haichang1Is the area of the plane of the water tank, h1Is the lowest water level, h2Is the height of the water tank, d1Is the radius of the pipeline of the water inlet pipe, K is the safety coefficient, V1Is the maximum water storage volume, V2To minimum water storage volume, V3The volume occupied by the gas in the water inlet pipe under the most unfavorable condition, VS1Volume of gas in the tank, V, being the most unfavorable stateS2Volume of gas in the water tank L when the pressure in the water tank is atmospheric1Is the length of the water inlet pipe in the vertical direction, L2For feeding waterThe length of the tube in the horizontal direction.
Preferably, when the water level in the water tank is lower than the lowest water level, the liquid level sensor is triggered to control and start the vacuum pump, a negative pressure environment is formed in the water tank, and the water is supplemented to the water tank by the water inlet pipe until the water tank is full of water.
Preferably, the strength of the water tank is minimum to be capable of bearing negative pressure, and the calculation formula of the negative pressure is as follows:
ΔP＝γ*(i*(L1+L2)+L1)
wherein γ is the water gravity, L1Is the length of the water inlet pipe in the vertical direction, L2Is the length of the water inlet pipe in the horizontal direction.
The effect provided in the summary of the invention is only the effect of the embodiment, not all the effects of the invention, and one of the above technical solutions has the following advantages or beneficial effects:
compared with the prior art, the pump house can be prevented from being arranged underground on the premise of meeting requirements through a siphon principle, the water inlet pipeline of the water tank is connected into the water tank from the upper part of the water tank, the water taking pipeline is separated from the water body in the water tank through air, so that a negative pressure environment is formed between the water inlet pipeline and the water body in the water tank, the pump house is arranged above the water tank through the common fire pump, the pump house does not need to be built by excavating beside the water tank, the leakage risk in the later operation period does not exist, compared with a long-shaft pump, the position of the fire pump can be flexibly arranged on a plane after the equipment is adopted, the equipment is not limited by the position of the fire pool, and the utilization rate of the fire pool is obviously improved.
Drawings
FIG. 1 is a schematic diagram of a underground fire pump room in the prior art;
FIG. 2 is a schematic diagram of an above-ground fire pump using an axial-flow deep-well pump according to the prior art;
fig. 3 is a schematic structural view of a ground fire water tank provided in an embodiment of the present invention.
Detailed Description
In order to clearly explain the technical features of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings. The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. It should be noted that the components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and procedures are omitted so as to not unnecessarily limit the invention.
The following describes a ground fire water tank provided by the embodiment of the invention in detail with reference to the accompanying drawings.
As shown in fig. 3, an embodiment of the present invention discloses a ground fire water tank, which includes:
the system comprises a water tank, a fire pump, a pressure stabilizing pump and a vacuum pump;
the water tank is arranged on the ground above the fire pool, a water inlet pipe is arranged above the water tank, and the water inlet pipe is connected to the fire pool and extends into the dead water level of the fire pool;
the water outlet of the water tank is connected with a fire pump and a pressure stabilizing pump, and when the fire pump works, a negative pressure environment is formed in the water tank;
the vacuum pump is arranged above the water tank, and when the water level in the water tank is lower than the lowest water level, the vacuum pump is controlled to be started through the liquid level sensor, so that a negative pressure environment is formed in the water tank.
A small water tank is arranged above the fire-fighting water pool, the lower part of the water tank is connected with a fire pump and a pressure stabilizing pump, and the plane area of the water tank is S1The height of the water tank is h2The lowest water level is h1So that the maximum water storage volume is V1＝S1*h2Minimum water storage volume is V2＝S1*(h2-h1) The lowest water level is designed to meet the self-filling requirement of the fire-fighting pump during operation under the worst condition.
The water tank is connected to the fire pool through the upper water inlet pipe,the steel pipe should go deep into the pool to reach the position of dead water level, and the radius of the pipeline is d1The length of the water inlet pipe is L1+L2The upper part of the water tank is provided with a vacuum pump which can generate a vacuum of not less than L1Water column height of (a).
The water tank and the water inlet pipe are completely sealed and can bear negative pressure generated when the fire pump works. Considering the working conditions of the fire-fighting water pool, the water level of the fire-fighting water pool is at the height of the dead water level, namely L1The water inlet pipe is completely dehydrated and filled with gas, which can be regarded as the most unfavorable condition of system work, and the volume of the gas in the pipe is
The fire-fighting water tank should satisfy the fire pump and irritate the formula requirement certainly, can produce the negative pressure in fire-fighting water tank at fire-fighting pump during operation, inhales the water tank through the water of inlet tube in with the pond, makes the water tank keep satisfying the water pump and irritate the formula requirement certainly after stable.
When the fire pump during operation, the inlet tube can dissolve the gas in the water tank in the form of small bubbles gradually in the aquatic when drawing water, is taken away by the fire pump, and vacuum can be bigger and bigger in the water tank in the actual work, and the factor of safety that self-priming formula required is also bigger and bigger, belongs to forward circulation.
When the water tank is not used for a long time and the water level in the water tank is lower than the lowest water level, the liquid level sensor can be triggered to control the starting of the vacuum pump, the water tank is vacuumized to form negative pressure, and then the water tank is supplemented with water to be full of the water by the water inlet pipe.
Assuming that the water output is Q and the hydraulic slope is i during the operation of the water pump, the air pressure in the water tank is reduced during the normal operation, and assuming that the minimum air pressure is P1At atmospheric pressure P0And the water gravity is gamma, and the hydraulic slope drop i is as follows on the premise of neglecting the local head loss of the elbow of the water inlet pipe:
Chis a high-purity Williams coefficient.
The pressure difference between the inside and the outside of the water tank is as follows:
ΔP＝γ*(i*(L1+L2)+L1)＝P0-P1
then
P1＝P0-γ*i*(L1+L2)-γ*L1
The volume of gas in the water tank under the assumption of the worst state in the non-working state is as follows:
VS1＝V1-V2＝S1*h1
the non-working state assumes the atmospheric pressure in the water tank, and can be known by a thermodynamic formula:
considering the most unfavorable conditions, the design value of the volume of the water tank should meet the following requirements:
V1＝S1*h2≥(S1*d2+VS2)
after introducing the safety factor K, it can be expressed as:
V1＝S1*h2≥K(S1*d2+VS2)
suppose P is taken0＝101kPa，Q＝45L/S，d1＝20cm，d2＝15cm，Ch100 (as per ordinary steel, cast iron pipe), L1＝5m，L2＝0.5m，γ＝10kN/m3，h1＝10cm，S1＝1m2And K is 2. Then substituting the formula to calculate V1＝1.62m3. I.e. in class C and building volumes greater than 5000m3Is not more than 20000m3Only a water tank with the size of 1.62 cubes needs to be arranged to meet the normal operation of the system.
According to the embodiment of the invention, the pump room is not required to be arranged underground on the premise of meeting the requirement through a siphon principle, the water inlet pipeline of the water tank is connected from the upper part of the water tank, the water taking pipeline is separated from the water body in the water tank through air, so that a negative pressure environment is formed between the water inlet pipeline and the water body in the water tank, the common fire pump is arranged above the water pool, the pump room is not required to be excavated beside the water pool, the leakage risk in the subsequent operation period is avoided, compared with a long-shaft pump, the position of the fire pump can be flexibly arranged on a plane after the equipment is adopted, the equipment is not limited by the position of the fire pool, and the utilization rate of the fire pool is obviously improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (5)
1. A ground fire water tank, characterized in that the fire water tank comprises:
the system comprises a water tank, a fire pump, a pressure stabilizing pump and a vacuum pump;
the water tank is arranged on the ground above the fire pool, a water inlet pipe is arranged above the water tank, and the water inlet pipe is connected to the fire pool and extends into the dead water level of the fire pool;
the water outlet of the water tank is connected with a fire pump and a pressure stabilizing pump, and when the fire pump works, a negative pressure environment is formed in the water tank;
the vacuum pump is arranged above the water tank, and when the water level in the water tank is lower than the lowest water level, the vacuum pump is controlled to be started through the liquid level sensor, so that a negative pressure environment is formed in the water tank;
the volume of the water tank meets the following conditions:
V1＝S1*h2≥K(S1*d2+VS2)
VS1＝V1-V2＝S1*h1
V3＝(L1+L2)*π*d1 2
wherein Q is the water yield of the water pump during operation, i is the hydraulic gradient along the way, P1At minimum air pressure, P0Is atmospheric pressure, gamma is the water gravity, ChIs a high Williams coefficient of Haichang1Is the area of the plane of the water tank, h1Is the lowest water level, h2Is the height of the water tank, d1Is the pipe radius of the water inlet pipe, d2Is the diameter of the water outlet pipe, K is the safety factor, V1Is the maximum water storage volume, V2To minimum water storage volume, V3The volume of gas in the water inlet pipe when the water surface of the fire pool is at the height of the dead water level is VS1Is the volume V of gas in the water tank when the water surface of the fire pool is at the height of the dead water levelS2Volume of gas in the water tank L when the pressure in the water tank is atmospheric1Is the length of the water inlet pipe in the vertical direction, L2Is the length of the water inlet pipe in the horizontal direction.
2. A fire-fighting water tank on the ground as recited in claim 1, wherein the minimum water level is set to satisfy the self-priming requirement of the fire-fighting water tank during the operation of the fire-fighting pump under the most unfavorable condition that the water surface of the fire-fighting water tank is at the height of the dead water level.
3. A fire fighting water tank on the ground as recited in claim 1 wherein the fire fighting pump is operated such that the water inlet pipe draws water to gradually dissolve the gas in the water tank in the form of small bubbles, which are then pumped away by the fire fighting pump.
4. The ground fire-fighting water tank as claimed in claim 1, wherein after the water tank is not used for a long time, when the water level in the water tank is lower than the lowest water level, the liquid level sensor is triggered to control and start the vacuum pump, a negative pressure environment is formed in the water tank, and the water inlet pipe replenishes water to the water tank until the water tank is full.
5. A fire fighting water tank on the ground as recited in claim 1, wherein the minimum strength of the water tank is capable of withstanding negative pressure, and the calculation formula of the magnitude of the negative pressure is:
ΔP＝γ*(i*(L1+L2)+L1)
wherein γ is the water gravity, L1Is the length of the water inlet pipe in the vertical direction, L2Is the length of the water inlet pipe in the horizontal direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010757766.XA CN111851656B (en) | 2020-07-31 | 2020-07-31 | Ground fire water tank |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010757766.XA CN111851656B (en) | 2020-07-31 | 2020-07-31 | Ground fire water tank |
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| Publication Number | Publication Date |
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| CN111851656A CN111851656A (en) | 2020-10-30 |
| CN111851656B true CN111851656B (en) | 2021-10-08 |
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| CN202010757766.XA Active CN111851656B (en) | 2020-07-31 | 2020-07-31 | Ground fire water tank |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1178870A (en) * | 1996-10-05 | 1998-04-15 | 王致新 | Self filling water suction device for water pump |
| CN1249311C (en) * | 2001-08-20 | 2006-04-05 | 汕头经济特区龙湖电力技术服务有限公司 | Non-pollution secondary water supply system for both life and fire fighting purposes |
| CN2786312Y (en) * | 2005-03-22 | 2006-06-07 | 邓君学 | Self-filling device of water pump |
| JP6086711B2 (en) * | 2012-12-05 | 2017-03-01 | 株式会社森松総合研究所 | Water tank with outflow control means |
| CN203514401U (en) * | 2013-11-09 | 2014-04-02 | 七台河宝泰隆圣迈煤化工有限责任公司 | Ground-type stabilized pressure pump |
| CN104564587A (en) * | 2014-12-31 | 2015-04-29 | 沈阳耐蚀合金泵股份有限公司 | Self-priming ground mounted synchronous discharge and suction fire pump set |
| CN206070651U (en) * | 2016-09-21 | 2017-04-05 | 黄勇 | A kind of civil building fire cistern intake device |
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2020
- 2020-07-31 CN CN202010757766.XA patent/CN111851656B/en active Active
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