CN109372732A - Automatic water pumping device for water and method in a kind of tunnel - Google Patents

Automatic water pumping device for water and method in a kind of tunnel Download PDF

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Publication number
CN109372732A
CN109372732A CN201811089022.4A CN201811089022A CN109372732A CN 109372732 A CN109372732 A CN 109372732A CN 201811089022 A CN201811089022 A CN 201811089022A CN 109372732 A CN109372732 A CN 109372732A
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CN
China
Prior art keywords
water
self
lock switch
switch
lever
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Granted
Application number
CN201811089022.4A
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Chinese (zh)
Other versions
CN109372732B (en
Inventor
薛翊国
李广坤
周炳桦
邱道宏
苏茂鑫
孔凡猛
公惠民
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Shandong University
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Shandong University
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Priority to CN201811089022.4A priority Critical patent/CN109372732B/en
Publication of CN109372732A publication Critical patent/CN109372732A/en
Application granted granted Critical
Publication of CN109372732B publication Critical patent/CN109372732B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/02Stopping, starting, unloading or idling control
    • F04B49/025Stopping, starting, unloading or idling control by means of floats

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

Abstract

The invention discloses automatic water pumping device for water and methods in a kind of tunnel, including suspension ball, fulcrum, lever, water pumping mechanism, self-lock switch and double control switch, wherein, the suspension ball is set to one end of lever, with certain freedom degree, water level can be followed and gone up and down, the other side of the lever is provided with contact block, the lever middle is provided with fulcrum, so that lever both ends are hanging, the upper and lower position of the contact block is each provided with a self-lock switch, when contact block follows lever to move up and down, by being contacted at first position with a self-lock switch, by being contacted when the second place with another self-lock switch, the double control switch is connected to each self-lock switch, and according to the movement of conducting situation control water pumping mechanism.

Description

Automatic water pumping device for water and method in a kind of tunnel
Technical field
The present invention relates to automatic water pumping device for water and methods in a kind of tunnel.
Background technique
During constructing tunnel, guarded drainage is a critically important engineering.Tunnel water handling follow " it is anti-, stifled, cut, row knot Close, adaptation to local conditions, comprehensive treatment " principle, take solid measure, reach that waterproof is reliable, drains unimpeded, economical rationality Purpose.Tunnel internal water accumulation mostlys come from the prominent water burst in tunnel, manually with water etc., this brings a degree of to constructing tunnel It influences.If ponding is excessive, it will bring obstruction to construction, influence construction speed.Corresponding organiztion measure and technology should be taken The ponding that measure eliminated or mitigated in work progress is adversely affected to engineering bring.
The ponding in tunnel in sump is mainly on duty by common manual inspection 24 hours at present, and real-time monitoring is catchmented Well water amount size avoids flooding tunnel ground because ponding is excessive, while also occupying a large amount of manpower and material resources.In practical work Cheng Zhong, it is how safer, intelligent, automatically solve the problems, such as this to be efficiently discharged ponding in sump in time, it is oneself One of urgent problem to be solved in dynamicization work progress.
Summary of the invention
The present invention to solve the above-mentioned problems, proposes automatic water pumping device for water and method in a kind of tunnel, and the present invention solves The problem of intelligent in tunnel, automation pump drainage water, and can use manpower and material resources sparingly, draining can be automatically controlled in real time, avoid Artificial 24 hours low efficiency problems on duty.
To achieve the goals above, the present invention adopts the following technical scheme:
Automatic water pumping device for water in a kind of tunnel, including suspension ball, fulcrum, lever, water pumping mechanism, self-lock switch and dual control are opened It closes, wherein the suspension ball is set to one end of lever, has certain freedom degree, can follow water level and go up and down, the thick stick The other side of bar is provided with contact block, and the lever middle is provided with fulcrum so that lever both ends are hanging, the contact block it is upper Lower position is each provided with a self-lock switch, when contact block follows lever to move up and down, by self-locking opening at first position with one Contact is closed, by contacting when the second place with another self-lock switch, the double control switch is connected to each self-lock switch, and root According to the movement of conducting situation control water pumping mechanism.
It is limited as further, the suspension ball is connect by connecting rod with lever.
It is limited as further, the connecting rod passes through retainer plate, and the retainer plate is fixed on tunnel bank, described Connecting rod can move up and down in retainer plate.
It is limited as further, the retainer plate at least two, and concentric shafts are laid, to control suspension ball rising Stability when decline keeps its not sideslip during the motion, can move vertically up and down.
It is limited as further, the suspension ball can float up and down according to sink water level height, the position energy of suspension ball The height for embodying water level, the movement of water pumping mechanism is indirectly controlled by suspension ball position height.
It is limited as further, the lever is rotated clockwise or counterclockwise by fulcrum, when water level rises, is driven The self-lock switch that contact block declines triggering lower section is indirectly controlled into water pumping mechanism movement;When water level decreasing, contact block is driven to rise The self-lock switch of triggering top indirectly controls water pumping mechanism movement.
Limited as further, the contact block is trapezoid block, during up and down motion can along with rotation, Preferably to self-lock switch and trigger self-lock switch.
It is limited as further, the double control switch respectively has one up and down, and when downside, double control switch is initially at first It sets, if water level rises to specified position, so that upside double control switch is got to the second position by self-lock switch, then double control switch It is connected to water pumping mechanism;When water level decreasing is to a certain position, downside double control switch is set to get to the 4th position by self-lock switch, Double control switch is disconnected with water pumping mechanism at this time, when water level rises to specified position again, makes upside by self-lock switch Switch gets to the third place, and double control switch is connected to water pumping mechanism at this time.
It is limited as further, the self-lock switch can be squeezed after docking with contact block by buoyancy effect by contact block Pressure, self-lock switch can be pressed and rotate control side double control switch;After the same self-lock switch is squeezed by contact block again, Self-lock switch can be popped up from original down state automatically, and then double control switch is driven to turn to the other side.
Working method based on above-mentioned apparatus, comprising the following steps:
Automatic water pumping device for water is installed, double control switch initial position is controlled, guarantees that water pumping mechanism does not work at this time;
When water level rising to specified position, suspension ball also rises to respective heights, declines contact block by lever It collides with the self-lock switch of lower section, triggering lower section self-lock switch, while the double control switch of control circuit inner lower being driven to rotate, Water pumping mechanism start-up operation is drawn water;
It constantly draws water, until suspension ball also drops to respective heights, makes to connect by lever when water level decreasing is to certain altitude Contact block rising is collided with top self-lock switch, triggering top self-lock switch, while the dual control of control circuit upper inside being driven to open Rotation is closed, water pumping mechanism stops working;
It loops back and forth like this, water level rises to specified altitude and can draw water, and is extracted into certain water level and stops pumping, and waits water level again It is secondary to start to draw water again when rising to specified altitude.
Compared with prior art, the invention has the benefit that
1) easy to operate, easy to use, low cost is invented, it is economical and practical;
2) present invention utilizes effect of the buoyancy to suspension ball, can indirectly control the switch of suction pump, and dexterously utilization rate is double Control switch performance so that water level rise and fall all can trigger switch, reduce manpower and material resources;
3) present invention in water level rising but not up to specified position, close and do not drain by switch, until specified position is opened again Breakdown close draining, can intelligent drainage function, economize on resources;
4) present invention is safe and efficient, and water trough inner water does not overflow when unattended, is raised to specified position meeting Auto-drainage, It is always maintained at water level in safe range.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present application, and the application's shows Meaning property embodiment and its explanation are not constituted an undue limitation on the present application for explaining the application.
Fig. 1 is overall structure of the present invention;
Fig. 2 is switch structure diagram of the present invention;
Fig. 3 is work flow diagram of the present invention.
Wherein: 1, suspension ball, 2, connecting rod, 3, retainer plate, 4, fulcrum, 5, lever, 6, trapezoid block, 7, self-lock switch, 8, Double control switch, 9, power switch, 10, suction pump, 11, water level, 12, sink;
Specific embodiment:
The invention will be further described with embodiment with reference to the accompanying drawing.
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
In the present invention, term for example "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", " side ", The orientation or positional relationship of the instructions such as "bottom" is to be based on the orientation or positional relationship shown in the drawings, only to facilitate describing this hair Bright each component or component structure relationship and the relative of determination, not refer in particular to either component or element in the present invention, cannot understand For limitation of the present invention.
In the present invention, term such as " affixed ", " connected ", " connection " be shall be understood in a broad sense, and indicate may be a fixed connection, It is also possible to be integrally connected or is detachably connected;It can be directly connected, it can also be indirectly connected through an intermediary.For The related scientific research of this field or technical staff can determine the concrete meaning of above-mentioned term in the present invention as the case may be, It is not considered as limiting the invention.
As shown in Figure 1, automatic water pumping device for water in a kind of tunnel, comprising: suspension ball 1, connecting rod 2, retainer plate 3, fulcrum 4, Lever 5, trapezoid block 6, self-lock switch 7, double control switch 8, power supply, suction pump 10 and sink 12.Suspension ball 1 is located on the water surface, can With water level rise and fall;2 upside of connecting rod is connected with lever 5, and downside is connected with suspension ball 1;Retainer plate 3 by connecting rod 2 therefrom It passes through;Fulcrum 4 is hinged with lever 5 between lever 5;Trapezoid block 6 is located at 5 side of lever, can be with about 5 lever Movement;Each one of about 7 self-lock switch, can connect with trapezoid block 6;Double control switch 8 is located inside control circuit, respectively there is one up and down A switch.
Simple structure of the present invention, convenient for operation, intelligent, automation improves control and draws water efficiency, while more saving Resource.
Suspension ball 1 can float up and down according to sink 12 water level height, and the high and low position of suspension ball 1 can embody water level height, The switch of suction pump 10 can be indirectly controlled by 1 position height of suspension ball.
2 upside of connecting rod is hinged with lever 5, and downside is fixedly connected with suspension ball 1, and when water level is high, suspension ball 1 drives connection Bar 2 rises, and drives connecting rod 2 to decline when water level is low.
About 3 retainer plate shares 2, can be used to control stability when 1 rise and fall of suspension ball, it is kept to move Not sideslip in the process, can move vertically up and down.
The basis that fulcrum 4 is moved as lever 5, while fulcrum 4 and lever 5 hingedly ensure that the stability that lever 5 moves, It in the course of rotation will not skew.
Lever 5 is rotated clockwise or counterclockwise by fulcrum 4, when water level rises, drives the decline triggering of left lateral trapezoidal block 6 Lower section self-lock switch 7 indirectly controls the switch of suction pump 10;When water level decreasing, left lateral trapezoidal block 6 is driven to rise triggering top self-locking Switch 7 indirectly controls the switch of suction pump 10.
Trapezoid block 6 be shaped to it is trapezoidal be because its during up and down motion along with rotation, be set as trapezoidal Preferably smooth to self-lock switch 7 and self-lock switch 7 can be triggered.
Self-lock switch 7 can be squeezed, 7 meeting of self-lock switch after docking with trapezoid block 6 by right side buoyancy effect by trapezoid block 6 Be pressed and rotation control circuit inside side double control switch 8;After the same self-lock switch 7 is squeezed by trapezoid block 6 again, Self-lock switch 7 can be automatically from original down state pop-up (being similar to ball pen working principle), and then drives in control circuit The side double control switch 8 in portion turns to the other side.
As shown in Fig. 2, about 8 double control switch respectively has one, when side switch is initially at 3. side, if water level rises to When specified position, get to side switch 1. by self-lock switch 7, then circuit communication, suction pump 10 is started to work;When under water level When dropping to a certain position, get to side switch 4. by self-lock switch 7, circuit disconnects at this time, and suction pump 10 stops working;When When water level rises to specified position again, get to side switch 2. by self-lock switch 7, at this time circuit communication, suction pump 10 It starts to work;When water level is reduced or increased again, similarly, switch combination is every 4 next circulation to working principle.
As shown in figure 3, the method based on automatic water pumping device for water in a kind of above-mentioned tunnel, comprising the following steps:
1, automatic water pumping device for water is first installed, 8 initial position of double control switch is taken out inside control circuit 3., to be 2. short circuit Water pump 10 does not work;
2, when water level rises in sink 12 to specified position, suspension ball 1 also rises to respective heights, passes through lever 5 The decline of left lateral trapezoidal block 6 is set to collide with lower section self-lock switch 7, triggering lower section self-lock switch 7, while driving subordinate in control circuit The double control switch 8 of side rotates, and gets to 4., at this time circuit communication, and the start-up operation of suction pump 10 is drawn water;
3, suction pump 10 constantly draws water, until when water level decreasing is to certain altitude in sink 12, suspension ball 1 also drops to pair Highly should increase left lateral trapezoidal block 6 by lever 5 and collide with top self-lock switch 7, triggering top self-lock switch 7, while band The double control switch 8 of dynamic control circuit upper inside rotates, and gets to 1., and circuit disconnects at this time, and suction pump 10 stops working;
4, it loops back and forth like this, water level rises to specified altitude and can draw water, and is extracted into certain water level and stops pumping, and waits water level It can start to draw water again when rising to specified altitude again.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repair Change, equivalent replacement, improvement etc., should be included within the scope of protection of this application.
Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not protects model to the present invention The limitation enclosed, those skilled in the art should understand that, based on the technical solutions of the present invention, those skilled in the art are not Need to make the creative labor the various modifications or changes that can be made still within protection scope of the present invention.

Claims (10)

1. automatic water pumping device for water in a kind of tunnel, it is characterized in that: including suspension ball, fulcrum, lever, water pumping mechanism, self-lock switch And double control switch, wherein the suspension ball is set to one end of lever, has certain freedom degree, can follow water level and rise Drop, the other side of the lever are provided with contact block, and the lever middle is provided with fulcrum, so that lever both ends are hanging, it is described The upper and lower position of contact block is each provided with a self-lock switch, when contact block follows lever to move up and down, at first position It is contacted with a self-lock switch, by contacting when the second place with another self-lock switch, the double control switch self-locking is opened with each Connection is logical, and according to the movement of conducting situation control water pumping mechanism.
2. automatic water pumping device for water in a kind of tunnel as described in claim 1, it is characterized in that: the suspension ball by connecting rod with Lever connection.
3. automatic water pumping device for water in a kind of tunnel as claimed in claim 2, it is characterized in that: the connecting rod passes through retainer plate, The retainer plate is fixed on tunnel bank, and the connecting rod can move up and down in retainer plate.
4. automatic water pumping device for water in a kind of tunnel as claimed in claim 3, it is characterized in that: the retainer plate at least two, And concentric shafts are laid, to control stability when suspension ball rise and fall, keeping it, sideslip, energy be not upper and lower during the motion Vertical movement.
5. automatic water pumping device for water in a kind of tunnel as described in claim 1, it is characterized in that: the suspension ball can be according to tank water Position height floats up and down, and the position of suspension ball can embody the height of water level, be drawn water by suspension ball position height to indirectly control The movement of mechanism.
6. automatic water pumping device for water in a kind of tunnel as described in claim 1, it is characterized in that: the lever is clockwise by fulcrum Or rotate counterclockwise, when water level rises, the self-lock switch that contact block is declined triggering lower section is driven to indirectly control water pumping mechanism Movement;When water level decreasing, the self-lock switch for driving contact block to rise triggering top indirectly controls water pumping mechanism movement.
7. automatic water pumping device for water in a kind of tunnel as described in claim 1, it is characterized in that: the contact block is trapezoid block, Preferably to self-lock switch and self-lock switch can be triggered along with rotation during up and down motion.
8. automatic water pumping device for water in a kind of tunnel as described in claim 1, it is characterized in that: the double control switch respectively has one up and down A, when downside, double control switch is initially at first position, if water level rises to specified position, keeps upside double by self-lock switch Control switch gets to the second position, then double control switch is connected to water pumping mechanism;When water level decreasing is to a certain position, opened by self-locking Pass makes downside double control switch get to the 4th position, and double control switch is disconnected with water pumping mechanism at this time, when water level rises to again When specified position, side switch is set to get to the third place by self-lock switch, double control switch is connected to water pumping mechanism at this time.
9. automatic water pumping device for water in a kind of tunnel as described in claim 1, it is characterized in that: the self-lock switch with contact block It after docking, can be squeezed by contact block by buoyancy effect, self-lock switch can be pressed and rotate control side double control switch;When same After a self-lock switch is squeezed by contact block again, self-lock switch can be popped up from original down state automatically, and then drive dual control Switch turns to the other side.
10. based on the working method of device as claimed in any one of claims 1-9 wherein, it is characterized in that: the following steps are included:
Automatic water pumping device for water is installed, double control switch initial position is controlled, guarantees that water pumping mechanism does not work at this time;
When water level rising to specified position, suspension ball also rises to respective heights, by lever make contact block decline and under The self-lock switch of side is collided, triggering lower section self-lock switch, while the double control switch of control circuit inner lower being driven to rotate, and is drawn water Mechanism start-up operation is drawn water;
It constantly draws water, until suspension ball also drops to respective heights, makes contact block by lever when water level decreasing is to certain altitude Rising is collided with top self-lock switch, triggering top self-lock switch, while the double control switch of control circuit upper inside being driven to turn Dynamic, water pumping mechanism stops working;
Loop back and forth like this, water level rises to specified altitude and can draw water, be extracted into certain water level and stop pumping, wait water level again on It can start to draw water again when being raised to specified altitude.
CN201811089022.4A 2018-09-18 2018-09-18 Automatic water pumping device and method in tunnel Expired - Fee Related CN109372732B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811089022.4A CN109372732B (en) 2018-09-18 2018-09-18 Automatic water pumping device and method in tunnel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811089022.4A CN109372732B (en) 2018-09-18 2018-09-18 Automatic water pumping device and method in tunnel

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CN109372732B CN109372732B (en) 2020-02-11

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110030496A (en) * 2019-04-16 2019-07-19 贵州大学 A kind of tunnel drainage pipeline built-in type blocking monitoring system and application method

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060275136A1 (en) * 2005-02-09 2006-12-07 Simple Liu Activation device for sump pumps
KR20090124636A (en) * 2008-05-30 2009-12-03 최덕진 Float-switching device of a water pump
CN202033078U (en) * 2011-04-22 2011-11-09 福建铭发水产开发有限公司 Water well level detection device for functional food
CN202148924U (en) * 2011-07-23 2012-02-22 中铁十二局集团第二工程有限公司 Automatic water pumping device for tunnel
CN202833060U (en) * 2012-04-19 2013-03-27 白银有色集团股份有限公司 Automatic water drawing device for basement
CN103994060A (en) * 2014-06-02 2014-08-20 湖南科技学院 Piston-type full-automatic water pumping controller
CN205943929U (en) * 2016-06-20 2017-02-08 昆明理工大学 Automatic device of power of drawing water is opened and cut off

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060275136A1 (en) * 2005-02-09 2006-12-07 Simple Liu Activation device for sump pumps
KR20090124636A (en) * 2008-05-30 2009-12-03 최덕진 Float-switching device of a water pump
CN202033078U (en) * 2011-04-22 2011-11-09 福建铭发水产开发有限公司 Water well level detection device for functional food
CN202148924U (en) * 2011-07-23 2012-02-22 中铁十二局集团第二工程有限公司 Automatic water pumping device for tunnel
CN202833060U (en) * 2012-04-19 2013-03-27 白银有色集团股份有限公司 Automatic water drawing device for basement
CN103994060A (en) * 2014-06-02 2014-08-20 湖南科技学院 Piston-type full-automatic water pumping controller
CN205943929U (en) * 2016-06-20 2017-02-08 昆明理工大学 Automatic device of power of drawing water is opened and cut off

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110030496A (en) * 2019-04-16 2019-07-19 贵州大学 A kind of tunnel drainage pipeline built-in type blocking monitoring system and application method
CN110030496B (en) * 2019-04-16 2021-06-15 贵州大学 Tunnel drainage pipeline pre-embedded type blockage monitoring system and using method

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Granted publication date: 20200211