CN106194761A - Automatization's drainage system of transfer sump - Google Patents

Automatization's drainage system of transfer sump Download PDF

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Publication number
CN106194761A
CN106194761A CN201610754495.6A CN201610754495A CN106194761A CN 106194761 A CN106194761 A CN 106194761A CN 201610754495 A CN201610754495 A CN 201610754495A CN 106194761 A CN106194761 A CN 106194761A
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China
Prior art keywords
negative pressure
water tank
pressure water
centrifugal pump
automatization
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Pending
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CN201610754495.6A
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Chinese (zh)
Inventor
郭玉龙
王永军
邬永权
艾井石
刘建
牛宝平
呼鹏举
杨晓超
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China Shenhua Energy Co Ltd
Shenhua Shendong Coal Group Co Ltd
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China Shenhua Energy Co Ltd
Shenhua Shendong Coal Group Co Ltd
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Application filed by China Shenhua Energy Co Ltd, Shenhua Shendong Coal Group Co Ltd filed Critical China Shenhua Energy Co Ltd
Priority to CN201610754495.6A priority Critical patent/CN106194761A/en
Publication of CN106194761A publication Critical patent/CN106194761A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
    • F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
    • F04D29/4293—Details of fluid inlet or outlet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D9/00—Priming; Preventing vapour lock
    • F04D9/004—Priming of not self-priming pumps
    • F04D9/006—Priming of not self-priming pumps by venting gas or using gas valves

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention discloses automatization's drainage system of a kind of transfer sump, including centrifugal pump, outlet pipe, suction hose and water injection pipe, also include the negative pressure water tank closed；Described water injection pipe connects with the top of described negative pressure water tank, and upon initial installation, described water injection pipe is to described negative pressure water tank water filling aerofluxus for described negative pressure water tank；Described centrifugal pump connects with described negative pressure water tank, makes to be formed in described negative pressure water tank negative pressure for extracting the liquid in described negative pressure water tank, and described centrifugal pump is by described outlet pipe drain liquid；Described suction hose is inserted in described negative pressure water tank, and described negative pressure water tank utilizes negative pressure to extract the liquid in described transfer sump by described suction hose.Due to the fact that and utilize negative pressure water tank and centrifugal pump, extract the liquid in transfer sump by negative pressure, eliminate existing water outlet electric gate valve, water filling electrical ball valve, aerofluxus electrical ball valve and bottom valve, simplify the structure of automatization's drainage system, for ease of maintenaince and change, reduce cost.

Description

Automatization's drainage system of transfer sump
Technical field
The present invention relates to mining machinery field, particularly relate to automatization's draining of a kind of transfer sump for drainage underground System.
Background technology
Along with the input of brocade circle Digitization Mine Technology for Datong Coalmines mine construction project, underground part transfer sump can realize automatization row Water, compares over artificial start-stop Centrifugal pump drainage, and automatization's drainage system decreases fixing draining post personnel, solves simultaneously The problems such as equipment inordinate wear and Fraquent start.Existing transfer sump automatization drainage system, main finds following problem:
1. automatization's drainage system is supporting water outlet electric gate valve, water filling electrical ball valve, aerofluxus electrical ball valve, bottom valve etc. exist All having fault in various degree to occur after running a period of time, the particularly electrical ball valve of water filling air-discharging easily damages, and changes relatively Frequently；
2. during current centrifugal pump proper drainage, flow process is for carry out water filling air-discharging the most in advance, when having foreign material or Guan Bi in bottom valve Time not tight, all affect the normal air-discharging time of centrifugal pump, cause air-discharging not thorough, even cause water pump normally to inhale Water, water pump idle running damage centrifugal pump body；
3. it is electronic component due to water outlet electric gate valve, water filling electrical ball valve, aerofluxus electrical ball valve, bottom valve etc., occurs Needing professional to carry out maintenance process after fault, it is longer that causing trouble processes the time；
4. more due to existing automatization draining corollary equipment, cause centrifugal pump cannot the many factors of normal starting, make Becoming transfer sump automatization drainage system unstable, unreliable, affect mine proper drainage, increase patrol officer overhauls by force simultaneously Degree, renewal cost is expensive.A set of Centrifugal pump drainage corollary equipment maintenance renewal cost about $8 ten thousand yuan.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, it is provided that a kind of simple in construction, convenient to install and maintain, cost Automatization's drainage system of low transfer sump.
Technical scheme provides automatization's drainage system of a kind of transfer sump, including centrifugal pump, outlet pipe, suction Water pipe and water injection pipe,
Also include the negative pressure water tank closed；
Described water injection pipe connects with the top of described negative pressure water tank, described negative pressure water tank upon initial installation, described water filling Pipe is to described negative pressure water tank water filling aerofluxus；
Described centrifugal pump connects with described negative pressure water tank, makes described negative pressure water for extracting the liquid in described negative pressure water tank Forming negative pressure in case, described centrifugal pump is by described outlet pipe drain liquid；
Described suction hose is inserted in described negative pressure water tank, and described negative pressure water tank utilizes negative pressure to be extracted by described suction hose Liquid in described transfer sump.
Further, described water injection pipe is provided with Water filling valve.
Further, described outlet pipe is provided with non-return valve.
Further, described outlet pipe connects with described water injection pipe.
Further, the bottom of described negative pressure water tank is provided with sewage draining exit.
Further, described suction hose is inserted at the mouth of pipe of described transfer sump and is provided with antifouling filter screen.
Further, described automatization drainage system also includes that control unit, described control unit include magnetic starter And level sensor, when level sensor detects that described transfer sump is high water level, magnetic starter controls described centrifugal Pump startup, when level sensor detects that described transfer sump is low water level, magnetic starter controls described centrifugal pump and stops Operating.
Further, vacuum h maintaining the described negative pressure water tank that described centrifugal pump runs well is:
H=h'+Hss+ΣΔh
The vacuum of the liquid that h' provides described centrifugal pump inhalation flow to be Q；
HssNeed the liquid-column height that lifts, i.e. from the top of described suction hose to the hanging down of liquid level of described transfer sump Straight distance；
Σ Δ h liquid injects the drag overall of described negative pressure water tank from described transfer sump through described suction hose；
h ′ = Q 2 / 2 gA 1 2
Wherein, the flow of described centrifugal pump is Q, and the cross-sectional area of described suction hose is A1, gravity accelerates as g.
Further, the minimum theoretical volume of negative pressure water tank can be determined by following formula:
V min = P a V 1 P a - h × υ + V 2 = P a V 1 P a - ( H s s + Q 2 2 gA 1 2 + Σ Δ h ) υ + S · K
PaAtmospheric pressure, Pa；
V1The volume of described suction hose；
V2The volume of liquid in described negative pressure water tank；
The proportion of υ water；
The sectional area of negative pressure water tank described in S；
K from the top of described suction hose to the vertical dimension of described negative pressure water tank bottom surface.
Further, it is considered to error present in engineering, after the actual volume correction using described negative pressure water tank it is:
VReal=(1.2～1.3) × Vmin。
After using technique scheme, have the advantages that
Due to the fact that and utilize negative pressure water tank and centrifugal pump, extract the liquid in transfer sump by negative pressure, eliminate Existing water outlet electric gate valve, water filling electrical ball valve, aerofluxus electrical ball valve and bottom valve, simplify the knot of automatization's drainage system Structure, it is easy to keep in repair and change, reduce cost.
Accompanying drawing explanation
Seeing accompanying drawing, the disclosure will be easier to understand.It is understood that these accompanying drawings are merely illustrative Purpose, and be not intended to protection scope of the present invention is construed as limiting.In figure:
Fig. 1 is the structural representation of automatization's drainage system of transfer sump in one embodiment of the invention；
Fig. 2 is the volume calculations schematic diagram of negative pressure water tank in one embodiment of the invention.
Reference synopsis:
1-centrifugal pump 2-outlet pipe 3-suction hose
4-water injection pipe 5-negative pressure water tank 6-air bleeding valve
7-Water filling valve 8-non-return valve 9-sewage draining exit
Suction hose at 10-magnetic starter 11-level sensor 12-centrifugal pump
100-transfer sump
Detailed description of the invention
Further illustrate the detailed description of the invention of the present invention below in conjunction with the accompanying drawings.
Easy to understand, according to technical scheme, under not changing true spirit, the general skill of this area Various structures mode that art personnel can mutually replace and implementation.Therefore, detailed description below and accompanying drawing are only Exemplary illustration to technical scheme, and be not to be construed as the whole of the present invention or be considered as inventive technique scheme Define or limit.
The up, down, left, right, before and after mentioned in this manual or may mention, front, the back side, top, bottom etc. Orientation term is to be defined relative to the structure shown in each accompanying drawing, and they are relative concepts, it is therefore possible to can root Correspondingly change according to diverse location, different use state residing for it.So, the most should be by these or other side Position term is construed to restricted term.
In the present embodiment, as it is shown in figure 1, automatization's drainage system of transfer sump, including centrifugal pump 1, outlet pipe 2, inhale Water pipe 3 and water injection pipe 4, also include the negative pressure water tank 5 closed and the air bleeding valve 6 being arranged on negative pressure water tank 5 top；Water injection pipe 4 with The top connection of negative pressure water tank 5, upon initial installation, water injection pipe 4 is to negative pressure water tank 5 water filling, and passes through air bleeding valve for negative pressure water tank 5 6 aerofluxuss；Centrifugal pump 1 connects with negative pressure water tank 5, makes to be formed in negative pressure water tank 5 negative pressure for extracting the liquid in negative pressure water tank 5, Centrifugal pump 1 is by outlet pipe 2 drain liquid；Suction hose 3 is inserted in negative pressure water tank 5, and negative pressure water tank 5 utilizes negative pressure to pass through water suction Pipe 3 extracts the liquid in transfer sump 100.
Wherein, upon initial installation, water injection pipe 4 is to negative pressure water tank 5 water filling, and passes through air bleeding valve 6 aerofluxus for negative pressure water tank 5, Air bleeding valve 6 is closed after aerofluxus.
It is preferred that air bleeding valve 6 can also be not provided with, air can also be got rid of by centrifugal pump 1 and outlet pipe 2.
When needing to extract the liquid in transfer sump 100, starting centrifugal pump 1, centrifugal pump 1 extracts in negative pressure water tank 5 Liquid so that form negative pressure in negative pressure water tank 5, utilizes negative pressure negative pressure water tank 5 to be extracted from transfer sump 100 by suction hose 3 Liquid.Liquid sequentially passes through suction hose 3, negative pressure water tank 5, centrifugal pump 1, is finally drawn out of from outlet pipe 2.
Due to the fact that and utilize negative pressure water tank and centrifugal pump, extract the liquid in transfer sump by negative pressure, eliminate Existing water outlet electric gate valve, water filling electrical ball valve, aerofluxus electrical ball valve and bottom valve, simplify the knot of automatization's drainage system Structure, it is easy to keep in repair and change, reduce cost.
In the present embodiment, as it is shown in figure 1, be provided with Water filling valve 7 on water injection pipe 4.
Water filling valve 7 is for regulating the water yield entered in negative pressure water tank 5.Properly functioning in order to ensure centrifugal pump 1, negative pressure water Must have the water of enough capacity in case 5, in Practical Project, Water filling valve 7 need to be opened to a certain degree.Meanwhile, when in negative pressure water tank 5 Gather mud too much, the sewage draining exit 9 that big Water filling valve 7 combines bottom negative pressure water tank 5 need to be opened and carry out backwash, reach effective blowdown Effect.
As it is shown in figure 1, the bottom of negative pressure water tank 5 is provided with sewage draining exit 9.
In the present embodiment, as it is shown in figure 1, be provided with non-return valve 8 on outlet pipe 2.
Non-return valve 8 makes liquid can only enter into outlet pipe 2 from centrifugal pump 1, and can not make liquid from outlet pipe 2 reflux to In centrifugal pump 1.
It is preferred that as it is shown in figure 1, outlet pipe 2 connects with water injection pipe 4.
Outlet pipe 2 and water injection pipe 4 are pooled on a house steward, and this house steward is used for connecting outside water storage apparatus, and this outside is stored up The liquid that on the one hand wetting system is extracted out from transfer sump 100 for storage, on the other hand supplies water for negative pressure water tank 5.
It is preferred that suction hose 3 is inserted at the mouth of pipe of transfer sump 100 is provided with antifouling filter screen (not shown).
Owing to transfer sump 100 mostly is sewage storehouse, need to design the anti-pollution measure of negative pressure water tank 5.The design of antifouling filter screen exists Suction hose 3 is inserted at the mouth of pipe of transfer sump 100, i.e. the bottom of suction hose 3, reduces and enters into the mud in negative pressure water tank 5 And impurity.
In the present embodiment, as it is shown in figure 1, automatization's drainage system also includes control unit, control unit includes that magnetic force opens Dynamic device 10 and level sensor 11, when level sensor 11 detects transfer sump 100 for high water level, magnetic starter 10 is controlled Centrifugal pump 1 processed starts, and when level sensor 11 detects transfer sump 100 for low water level, magnetic starter 10 controls centrifugal Pump 1 shuts down.
According to transfer sump 100 practical situation set gradually from top to bottom high and low, (common port) three level sensors 11, it is ensured that when transfer sump 100 reaches high water level, water is unlikely to overflow.High water level plays pump, low water level termination of pumping.
In the present invention, negative pressure water tank 5 and centrifugal pump 1 form linker, by calculating the same centrifugal pump of volume of negative pressure water tank 5 The Proper Match of 1 suction pipeline, designs and produces negative pressure water tank 5, the most rationally arranges the top of suction hose 3 and the height of sump liquid level Degree Hss, negative pressure water tank top and centrifugal pump 1 height H, it is ensured that in making negative pressure water tank under vacuum power effect, water level can not decline, All the time more volumetric water is there is, even if letting out at suction hose and centrifugal pump seal in ensureing suction hose, negative pressure water tank and centrifugal pump Leakage, also can gradually decrease under this vacuum power effect and even stop.It is easy to centrifugal pump start at any time, negative pressure after centrifugal pump operates Water tank shaped becomes vacuum state, continuous automatic ink-suction, reaches draining purpose.
When centrifugal pump 1 starts, the amount of liquid in negative pressure water tank 5 need to be centrifuged more than the volume of centrifugal pump suction pipeline simultaneously After pump 1 operating, negative pressure water tank 5 needs the amount of liquid adapted with Centrifugal Pump, to maintain the water entering negative pressure water tank 5 Amount balances each other with the water yield extracted out by centrifugal pump 1, it is ensured that water pump steady running.
As in figure 2 it is shown, vacuum h of the negative pressure water tank 5 of maintenance centrifugal pump 1 normal operation is:
H=h'+Hss+∑Δh
The vacuum of the liquid that h' provides centrifugal pump 1 inhalation flow to be Q；
HssNeed the liquid-column height that lifts, i.e. from the top of suction hose 3 to the liquid level of transfer sump 100 vertical away from From；
∑ Δ h liquid injects the drag overall of negative pressure water tank 5 from transfer sump 100 through suction hose 3；
h ′ = Q 2 / 2 gA 1 2
Wherein, the flow of centrifugal pump 1 is Q, and the cross-sectional area of suction hose 3 is A1, gravity accelerates as g.
The minimum theoretical volume of negative pressure water tank 5 can be determined by following formula:
V min = P a V 1 P a - h × υ + V 2 = P a V 1 P a - ( H s s + Q 2 2 gA 1 2 + Σ Δ h ) υ + S · K
PaAtmospheric pressure, Pa；
V1The volume of suction hose 3；
V2The volume of liquid in negative pressure water tank 5；
The proportion of υ water；
The sectional area of S negative pressure water tank 5；
K from the top of suction hose 3 to the vertical dimension of negative pressure water tank 5 bottom surface.
Consider error present in engineering, after the actual volume correction using negative pressure water tank 5 be:
VReal=(1.2～1.3) × Vmin。
Additionally, the top of suction hose 3 is to distance H of sump liquid levelssWith negative pressure water tank 5 top to centrifugal pump 1 centre-height H It is required to verify:
(1)HssVerification:
Face on the basis of sump liquid level 0-0, lists top 1 '-1 ' section of suction hose 3 to Bernoulli Jacob side between 0-0 datum level Journey:
Z0+P0/υ+V0 2/ 2g=Z1+P1/υ+V0 2/2g+hw0-1
0-0 section: Z0=0, P0=Pa, because the sectional area of transfer sump 100 is much larger than the cross-sectional area of suction hose 3, then V0 =0.
1 '-1 ' section: Z1=Hss, V1=Q/A, hw0-1=λ LV1 2/ 2dg=λ LQ2/2dgA2
Substitution above formula obtains:
0+Pa/ υ+0=Hss+P1/υ+Q2/2gA2+λLQ2/2dgA2
After conversion: (Pa-P1)/υ=Hss+(1+λL/d)Q2/2gA2
In formula:
PaAtmospheric pressure, Pa；
The severe of υ water；
Q Centrifugal Pump, m3/s；
A suction hose cross-sectional area, m2；
L suction hose length, m；
D suction hose diameter, m；
V suction hose velocity in pipes, m/s；
λ frictional resistant coefficient.
Only friction loss h in suction hosew0-1, without local resistance.
The determination of frictional resistant coefficient λ:
1) Reynolds number R is determinede=Vd/ γ=4Q/ π d γ, is differentiated fluidised form by Reynolds number, and γ is water sport coefficient of viscosity, often 1.003 × 10 are taken under temperature-6m2/s。
2) by ReDetermine λ calculating formula:
①Re< 2320, laminar region: λ=64/Re；
②Re> 2320, turbulent region: for new pipe, λ=0.0121K1K2/d0.226；For old pipe, λ=0.021/d0.3；
Under actual production conditions, K1=1.15, K2=1.18.
(P in above formulaa-P1)/υ is water suction vacuum values H that suction hose produces at 1 '-1 ' section partv1, this value need to less than from Heart pump is maximum allowable sucts vacuum values Hs, otherwise centrifugal pump will appear from cavitation, i.e. Hss+(1+λL/d)Q2/2gA2＜ Hs(HsBy from Xin Beng manufacturer provides).
After conversion: Hss＜ Hs-(1+λL/d)Q2/2gA2。
(2) verification of H:
Face on the basis of suction hose center, list negative pressure water tank top 3 '-3 ' section to centrifugal pump transverse section 2 '-2 ' between Bernoulli equation:
H+P3/υ+V3 2/ 2g=Z2+P2/υ+V2 2/2g+hw3-2
3 '-3 ' section: V3=0 (cross section of negative pressure water tank 5 is much larger than the cross section of suction hose 12 at centrifugal pump), centrifugal At pump, suction hose 12 is shown in Fig. 1.
2 '-2 ' section: Z2=0, V2=Q/A,
Substitution above formula obtains:
H+P3/ υ+0=0+P2/υ+Q2/2gA2+λLQ2/2dgA2
After conversion: (P2-P3)/υ=H-(1+ λ L/d) Q2/2gA2
(P2-P3)/υ is vacuum values H that negative pressure water tank inner top 3 '-3 ' section part producesv2, this value need to be less than centrifugal pump Maximum allowable suct vacuum values Hs, otherwise will appear from vaporization phenomenon at 3 '-3 ' section part, i.e. H-(1+ λ L/d) Q2/2gA2＜ Hs, After conversion: H ＜ Hs+(1+λL/d)Q2/2gA2。
Wherein, L represents the length of suction hose 12 at centrifugal pump.
In centrifugal pump starting process, negative-pressure vacuum value H of negative pressure water tank top 3 '-3 ' sectionv2Negative less than at the water suction mouth of pipe Pressure vacuum values Hv1, now under the effect of external atmosphere pressure, the water of transfer sump 100 can be inhaled into negative pressure water tank 5, enter again from At heart pump, suction hose 12 is discharged after centrifugal pump 1.
In the actual application of the present invention one, negative pressure water tank 5 uses the steel plate of 6mm to process (cost 1000 yuan, originally electromagnetism The materials 80,000 yuan such as valve, electrical ball valve, sensor), save fund obvious；And system is convenient for installation and maintenance, negative pressure water tank is provided with row Dirty mouth, only needs periodical blowdown, changes the present situation of the valve that frequently refoots.Eliminate transfer sump draining post work, decrease main water Laying of pipeline, has saved the electricity charge, reduces centrifugal pump abrasion of knowing clearly.Native system is through test running, and state is steady, respond well. , making discovery from observation, it is less that negative pressure water tank Auto-drainage plays pump initial stage electric current meanwhile, and through more than 10 seconds, electric current recovered to volume Definite value, and this phenomenon has universality, it can be seen that, negative pressure water tank self-draining arrangement also has the effect of " soft open ", to electricity Machine plays certain protective role.
Above-described is only principle and the preferred embodiment of the present invention.It should be pointed out that, the common skill for this area For art personnel, on the basis of the principle of the invention, it is also possible to make other modification some, also should be regarded as the protection model of the present invention Enclose.

Claims (10)

1. automatization's drainage system of transfer sump, including centrifugal pump, outlet pipe, suction hose and water injection pipe, its feature exists In,
Also include the negative pressure water tank closed；
Described water injection pipe connects with the top of described negative pressure water tank, described negative pressure water tank upon initial installation, described water injection pipe pair Described negative pressure water tank water filling aerofluxus；
Described centrifugal pump connects with described negative pressure water tank, makes in described negative pressure water tank for extracting the liquid in described negative pressure water tank Forming negative pressure, described centrifugal pump is by described outlet pipe drain liquid；
Described suction hose is inserted in described negative pressure water tank, and it is described that described negative pressure water tank utilizes negative pressure to pass through the extraction of described suction hose Liquid in transfer sump.
Automatization's drainage system of transfer sump the most according to claim 1, it is characterised in that install on described water injection pipe There is Water filling valve.
Automatization's drainage system of transfer sump the most according to claim 1, it is characterised in that install on described outlet pipe There is non-return valve.
Automatization's drainage system of transfer sump the most according to claim 3, it is characterised in that described outlet pipe is with described Water injection pipe connects.
Automatization's drainage system of transfer sump the most according to claim 1, it is characterised in that the end of described negative pressure water tank Portion is provided with sewage draining exit.
Automatization's drainage system of transfer sump the most according to claim 1, it is characterised in that described suction hose is inserted into It is provided with antifouling filter screen at the mouth of pipe of described transfer sump.
Automatization's drainage system of transfer sump the most according to claim 1, it is characterised in that draining system of described automatization System also includes that control unit, described control unit include magnetic starter and level sensor, when level sensor detects institute Stating transfer sump when being high water level, magnetic starter controls described centrifugal pump and starts, when level sensor detects described transfer When sump is low water level, magnetic starter controls described centrifugal pump and shuts down.
Automatization's drainage system of transfer sump the most according to claim 1, it is characterised in that just maintaining described centrifugal pump Often vacuum h of the described negative pressure water tank of operating is:
H=h'+Hss+ΣΔh
The vacuum of the liquid that h' provides described centrifugal pump inhalation flow to be Q；
HssNeed the liquid-column height that lifts, i.e. from the top of described suction hose to described transfer sump liquid level vertical away from From；
Σ Δ h liquid injects the drag overall of described negative pressure water tank from described transfer sump through described suction hose.
h &prime; = Q 2 / 2 gA 1 2
Wherein, the flow of described centrifugal pump is Q, and the cross-sectional area of described suction hose is A1, gravity accelerates as g.
Automatization's drainage system of transfer sump the most according to claim 8, it is characterised in that the minimum reason of negative pressure water tank Opinion volume can be determined by following formula:
V min = P a V 1 P a - h &times; &upsi; + V 2 = P a V 1 P a - ( H s s + Q 2 2 gA 1 2 + &Sigma; &Delta; h ) &upsi; + S &CenterDot; K
PaAtmospheric pressure, Pa；
V1The volume of described suction hose；
V2The volume of liquid in described negative pressure water tank；
The proportion of υ water；
The sectional area of negative pressure water tank described in S；
K from the top of described suction hose to the vertical dimension of described negative pressure water tank bottom surface.
Automatization's drainage system of transfer sump the most according to claim 9, it is characterised in that consider to exist in engineering Error, after the actual volume correction using described negative pressure water tank be:
VReal=(1.2～1.3) × Vmin。
CN201610754495.6A 2016-08-29 2016-08-29 Automatization's drainage system of transfer sump Pending CN106194761A (en)

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CN107288209A (en) * 2017-08-14 2017-10-24 淮南矿业(集团)有限责任公司 Boiler room cesspool self-draining arrangement and its electric-control system
CN108105117A (en) * 2017-12-01 2018-06-01 山东东山新驿煤矿有限公司 A kind of mine drainage control system with Redundant Control
CN109394067A (en) * 2018-11-09 2019-03-01 珠海格力电器股份有限公司 Absorb water attachment and dust catcher
CN113008457A (en) * 2021-02-23 2021-06-22 机械工业第九设计研究院有限公司 New scheme for rain water supply of whole automobile

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