CN104503492B - Water level regulating device of sealed water tank - Google Patents
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Abstract
一种封闭式水箱的水位调节装置，包括封闭式水箱⑴，所述补水管⑵与封闭式水箱⑴的底部相连通，并在水箱内部呈环形布置，补水管⑵上设有阀门⑶；所述封闭式水箱⑴通过一个以上出水口与排水管⑷相连通，排水管⑷上设有排水泵⑸；所述封闭式水箱⑴顶部设有水位探测仪⑹，水位探测仪⑹通过信号线⑻与功率调节仪⑺相连，继而功率调节仪⑺与排水泵⑸相连，用于控制排水泵⑸的流量；所述封闭式水箱⑴上还开有与模型水道系统相连通的进/出水口⑼。其优点是：本发明装置原理科学可靠、集成度高，结构简单、制造容易、安装方便，运行可靠、工作效率高，控制精密、便于整合现代自动控制技术。可有效的完成水电站模型试验封闭式水箱的水位调节。
A water level adjustment device for a closed water tank, comprising a closed water tank (1), the water supply pipe (2) communicated with the bottom of the closed water tank (1), and arranged in a ring inside the water tank, the water supply pipe (2) is provided with a valve (3); The closed water tank ⑴ is connected with the drain pipe ⑷ through more than one water outlet, and the drain pipe ⑷ is provided with a drainage pump ⑸; the top of the closed water tank ⑴ is provided with a water level detector ⑹, and the water level detector ⑹ communicates with the power through the signal line ⑻ The regulator ⑺ is connected, and then the power regulator ⑺ is connected with the drainage pump ⑸ to control the flow of the drainage pump ⑸; the closed water tank ⑴ also has an inlet/outlet ⑼ connected with the model waterway system. The advantages are: the device of the invention has scientific and reliable principles, high integration, simple structure, easy manufacture, convenient installation, reliable operation, high work efficiency, precise control, and easy integration of modern automatic control technology. The water level adjustment of the closed water tank of the hydropower station model test can be effectively completed.
Description
技术领域technical field
本发明涉及水位调节装置，具体的说是一种封闭式水箱的水位调节装置。The invention relates to a water level regulating device, in particular to a water level regulating device of a closed water tank.
背景技术Background technique
在水电站引水发电系统物理模型试验中，模型引水发电系统由模型机组系统（包括蜗壳、尾水管、转轮、导水机构、同步发电机、发电机和水轮机的联轴器以及支架等）和模型水道系统（包括进水口、上游引水管道/渠道、模型机组、尾水管、尾水闸门槽、尾水支洞、尾水洞/尾水明渠、出水口等）两部分组成，并将这两部分有机结合，共同放置于循环水系统中。循环水系统则通过上、下游水箱与模型水道系统的进水口、出水口相连，组成完整的水电站引水发电系统物理模型试验平台。In the physical model test of the water diversion power generation system of the hydropower station, the model water diversion power generation system consists of the model unit system (including the volute, the draft tube, the runner, the water guide mechanism, the synchronous generator, the coupling of the generator and the turbine, and the bracket, etc.) and The model waterway system (including water inlet, upstream water diversion pipe/channel, model unit, draft tube, tailgate gate slot, tailwater branch tunnel, tailwater tunnel/tailwater open channel, water outlet, etc.) consists of two parts, and the two Some are organically combined and placed together in the circulating water system. The circulating water system is connected to the water inlet and outlet of the model waterway system through the upstream and downstream water tanks to form a complete physical model test platform for the water diversion power generation system of the hydropower station.
上、下游水箱在模型试验中主要起到模拟原型中的上下游水库、为模型引水发电系统提供恒定的水位。一般要求水箱能够提供不同高度的水位，满足开展不同尾水位下电站模型试验的要求；同时，为了真实的反映原型水库的水位特性，则要求水箱内的水位在某一试验工况下为恒定值。由于试验中的水箱体积比较有限，因此保持水位恒定、尽可能减小试验中水位的波动成了水箱设计的核心所在。In the model test, the upstream and downstream water tanks mainly serve to simulate the upstream and downstream reservoirs in the prototype and provide a constant water level for the model water diversion power generation system. It is generally required that the water tank can provide water levels of different heights to meet the requirements of carrying out model tests of power stations under different tailwater levels; at the same time, in order to truly reflect the water level characteristics of the prototype reservoir, the water level in the water tank is required to be a constant value under a certain test condition . Since the volume of the water tank in the test is relatively limited, keeping the water level constant and minimizing the fluctuation of the water level in the test has become the core of the design of the water tank.
常规的水电站模型试验水箱一般设计成开敞式，通过平水槽溢流的型式提供一恒定水位，本质上是一种开环水位控制系统。但是开敞式水箱能够提供的可用水头变幅较小，且易受试验场尺寸大小的限制，因为其所能提供的最高水位必须低于试验场顶部高度、最低水位必须高于试验场地面高度；且水箱的通用性较差，不同模型引水发电系统必须配备特定的开敞式水箱，增大了设备投资。Conventional hydropower station model test water tanks are generally designed to be open, providing a constant water level through the overflow of the flat tank, which is essentially an open-loop water level control system. However, the available water head that the open water tank can provide is small, and it is easily limited by the size of the test site, because the highest water level it can provide must be lower than the height of the top of the test site, and the lowest water level must be higher than the ground level of the test site ; And the versatility of the water tank is poor, and different models of water diversion power generation systems must be equipped with specific open water tanks, which increases equipment investment.
封闭式水箱可以很好的解决开敞式水箱的以上几点缺陷。其水箱整体是封闭、与外界大气隔绝的；水箱内部的水面之上存有一定的空气，可以通过水箱进行抽气、充气的方式按要求改变水箱内部的气体压力，从而模拟出任意需要的压力值；此功能也使得一个封闭式水箱可用于不同的模型电站的试验中。故此种水箱得到了越来越多的使用，为以后模型试验水箱的发展趋势。The closed water tank can well solve the above defects of the open water tank. The water tank as a whole is closed and isolated from the outside atmosphere; there is a certain amount of air above the water surface inside the water tank, and the gas pressure inside the water tank can be changed as required by pumping and inflating the water tank, thereby simulating any required pressure. value; this feature also enables a closed tank to be used in experiments with different model power plants. Therefore, this kind of water tank has been used more and more, which is the development trend of the model test water tank in the future.
对于封闭式水箱，内部气体的压力控制（抽气、充气）关系到水箱本身功能的发挥，但可较容易的实现；水箱内水位的控制一方面关系到压力值的施加，另一方面关系到试验模拟结果的真实性和准确性，尤为重要，并且因为其密闭的特性，不能利用常规水箱中的平水槽溢流方式来提供任意的恒定水位。因此，为了实现封闭式水箱的安全、有效、方便的使用，有必要发明合适的水位调节装置。For closed water tanks, the pressure control of the internal gas (pumping and inflation) is related to the function of the water tank itself, but it can be realized relatively easily; the control of the water level in the water tank is related to the application of the pressure value on the one hand, and on the other hand. The authenticity and accuracy of the test simulation results are particularly important, and because of its airtight characteristics, the flat tank overflow method in the conventional water tank cannot be used to provide an arbitrary constant water level. Therefore, in order to realize the safe, effective and convenient use of closed water tanks, it is necessary to invent suitable water level regulating devices.
发明内容Contents of the invention
本发明的目的是针对现有技术存在的缺陷，提供一种封闭式水箱的水位调节装置，在保证封闭式水箱抽气、充气功能正常实施的前提下，可以将水箱内的水位维持在一指定值保持不变，即使有较小的波动也在试验误差可以接受的范围内。The object of the present invention is to provide a water level regulating device for a closed water tank in view of the defects in the prior art, which can maintain the water level in the water tank at a specified level under the premise of ensuring the normal implementation of the air pumping and inflation functions of the closed water tank. The values remain unchanged, even with small fluctuations within the acceptable range of experimental error.
一种封闭式水箱的水位调节装置，包括封闭式水箱1，所述补水管2与封闭式水箱1的底部相连通，并在水箱内部呈环形布置，补水管2上设有阀门3；所述封闭式水箱1通过一个以上出水口与排水管4相连通，排水管4上设有排水泵5；所述封闭式水箱1顶部设有水位探测仪6，水位探测仪6通过信号线8与功率调节仪7相连，继而功率调节仪7与排水泵5相连，用于控制排水泵5的流量；所述封闭式水箱1上还开有与模型水道系统相连通的进/出水口9。A water level adjustment device for a closed water tank, comprising a closed water tank 1, the water replenishment pipe 2 communicates with the bottom of the closed water tank 1, and is arranged in a ring inside the water tank, and the water replenishment pipe 2 is provided with a valve 3; The closed water tank 1 is connected with the drain pipe 4 through more than one water outlet, and the drain pipe 4 is provided with a drain pump 5; the top of the closed water tank 1 is provided with a water level detector 6, and the water level detector 6 communicates with the power through the signal line 8. The regulator 7 is connected, and then the power regulator 7 is connected with the drainage pump 5 for controlling the flow of the drainage pump 5; the closed water tank 1 also has an inlet/outlet 9 connected with the model waterway system.
所述封闭式水箱1出水口的水位高于封闭式水箱1进水口的水位。The water level of the water outlet of the closed water tank 1 is higher than the water level of the water inlet of the closed water tank 1 .
本发明的工作原理与过程如下：通过水箱内水位的实时测量与反馈，来控制排水泵的排水流量，形成一闭环反馈控制系统，并且采用比例控制环节，水位偏离基准水位也越大，相应的排水泵抽水量也越大，这样可以快速的达到水位调节目的，得到要求的水位值。具体工作时，首先关闭排水泵，由补水管给水箱补水，至所需水位，然后关闭补水管，启动闭环水位监控系统，并将此时的水位设定为基准水位，对应排水泵的功率为0；试验开始的同时，排水泵也根据水箱内水位的变化投入工作，进行实时的调节，在较短的时间内将水位调节至所需水位。The working principle and process of the present invention are as follows: through the real-time measurement and feedback of the water level in the water tank, the drainage flow of the drainage pump is controlled to form a closed-loop feedback control system, and a proportional control link is adopted. The greater the water level deviates from the reference water level, the corresponding The pumping capacity of the drainage pump is also larger, so that the purpose of water level adjustment can be quickly achieved and the required water level value can be obtained. During the specific work, first turn off the drainage pump, supply water to the water tank through the water supply pipe to the required water level, then close the water supply pipe, start the closed-loop water level monitoring system, and set the water level at this time as the reference water level, and the power of the corresponding drainage pump is 0; At the same time as the test starts, the drainage pump is also put into operation according to the change of the water level in the water tank, and the real-time adjustment is carried out to adjust the water level to the required water level in a short period of time.
本发明封闭式水箱的水位调节装置的优点是：本发明装置原理科学可靠、集成度高，结构简单、制造容易、安装方便，运行可靠、工作效率高，控制精密、便于整合现代自动控制技术。可有效的完成水电站模型试验封闭式水箱的水位调节。The advantages of the water level regulating device of the closed water tank of the present invention are: the principle of the device of the present invention is scientific and reliable, the integration is high, the structure is simple, the manufacture is easy, the installation is convenient, the operation is reliable, the work efficiency is high, the control is precise, and it is convenient to integrate modern automatic control technology. The water level adjustment of the closed water tank of the hydropower station model test can be effectively completed.
附图说明Description of drawings
图1为本发明的整体结构示意图。Figure 1 is a schematic diagram of the overall structure of the present invention.
图2为本发明的侧视图。Figure 2 is a side view of the present invention.
图3为本发明的仰视图。Fig. 3 is a bottom view of the present invention.
图4为图1的内视图。Fig. 4 is an internal view of Fig. 1 .
图5为本发明的工作原理框图。Fig. 5 is a working principle block diagram of the present invention.
图中，1为封闭式水箱，2为补水管，3为阀门，4为排水管，5为排水泵，6为水位探测仪，7为功率调节仪，8为信号线，9为进/出水口。In the figure, 1 is a closed water tank, 2 is a water supply pipe, 3 is a valve, 4 is a drain pipe, 5 is a drain pump, 6 is a water level detector, 7 is a power regulator, 8 is a signal line, and 9 is an in/out Shuikou.
具体实施方式detailed description
下面结合附图，对本发明进行进一步说明。如图1-5所示，一种封闭式水箱的水位调节装置，由以下部件组成：封闭式水箱1、补水管2、阀门3、排水管4、排水泵5、水位探测仪6、功率调节仪7、信号线8、模型水道系统的进/出水口9。补水管2在封闭式水箱1的底部引入，并在水箱内部环形布置，补水管2上装置一个阀门3，排水管4在封闭式水箱1较低的位置出水、其上安装一排水泵5，水位探测仪6布置在水箱内部的顶端，其测量的水位信号由信号线8传送给功率调节仪7，功率调节仪7根据接收到的信号调节排水泵5的排水流量。The present invention will be further described below in conjunction with the accompanying drawings. As shown in Figure 1-5, a water level adjustment device for a closed water tank is composed of the following components: closed water tank 1, water supply pipe 2, valve 3, drain pipe 4, drain pump 5, water level detector 6, power adjustment Instrument 7, signal line 8, water inlet/outlet 9 of the model waterway system. The water replenishment pipe 2 is introduced at the bottom of the closed water tank 1 and arranged circularly inside the water tank. A valve 3 is installed on the water replenishment pipe 2. The drain pipe 4 discharges water at a lower position of the closed water tank 1, and a drainage pump 5 is installed on it. The water level detector 6 is arranged at the top inside the water tank, and the water level signal measured by it is transmitted to the power regulator 7 by the signal line 8, and the power regulator 7 adjusts the drainage flow of the drainage pump 5 according to the received signal.
本发明是这样实现的：封闭式水箱除了通过进、出水口与模型水道系统相连外，通常有一个补水管和一个排水管，补水管接循环水系统的供水管道，排水管接循环水系统的回水渠道。本发明通过对补水管和排水管进行优化设计来实现发明目的。补水管在水箱底部引入，并通过一布置在水箱底部的环形、均匀开口的管道将所补水均匀、平稳的引入水箱，同时起到消能的作用；补水管上设阀门控制流量。排水管上面装置一个排水泵，将超过要求水位之上的水抽出；为了精确控制抽水量，在水箱内顶部布置一个或多个水位探测仪（多个时需均匀布置，并取其平均值），实时测定水位的位置，并将此水位信号通过一反馈装置传输给排水泵，同时在排水泵上配置一可编程的功率调节仪，此仪器可以通过接受水位探测仪传输来的信号调整排水泵的功率（即抽水流量），以试验要求的水位值为基准水位（0），此水位对应的排水泵的功率设定为0，即不抽水，当水箱内水位高于基准水位时，功率大于0，排水泵便启动排水，并且水位高于基准值的值越高，泵抽水的功率越大，当水位抽到等于基准水位时，水泵又停止工作，如此反复，形成一实时反馈、实时控制的闭环水位监控系统。为了使探测仪测定的水位值能真实反映水箱内各处的水位，可以增加水位探测仪的数量，并将它们均匀的分布于水面上各处；同时为了减小排水泵抽水给水箱内水位带来的干扰，可设置4个排水管出口，并将它们汇集到一根管道上，再将排水泵装置于汇集后的总管上；4个排水管可均匀的布置在水箱的底部各处（低于水箱最低水位，保证排水管为有压，并留有一定的压力裕度）。The present invention is realized in this way: besides being connected with the model waterway system through the water inlet and outlet, the closed water tank usually has a water replenishment pipe and a drain pipe, the water replenishment pipe is connected to the water supply pipe of the circulating water system, and the drain pipe is connected to the water supply pipe of the circulating water system return channel. The present invention realizes the purpose of the invention by optimizing the design of the water supply pipe and the drain pipe. The water replenishment pipe is introduced at the bottom of the water tank, and the replenished water is evenly and stably introduced into the water tank through a ring-shaped, evenly opened pipe arranged at the bottom of the water tank, and at the same time plays the role of energy dissipation; the water replenishment pipe is equipped with a valve to control the flow. A drainage pump is installed above the drain pipe to pump out the water above the required water level; in order to accurately control the amount of water pumped, one or more water level detectors are arranged on the top of the water tank (if there are more than one, they need to be evenly arranged, and the average value is taken) , measure the position of the water level in real time, and transmit the water level signal to the drainage pump through a feedback device, and configure a programmable power regulator on the drainage pump, which can adjust the drainage pump by receiving the signal transmitted by the water level detector The power (that is, the pumping flow rate), the water level required by the test is the reference water level (0), and the power of the drainage pump corresponding to this water level is set to 0, that is, no water is pumped. When the water level in the water tank is higher than the reference water level, the power is greater than 0, the drainage pump will start to drain water, and the higher the value of the water level is higher than the reference value, the greater the pumping power will be. When the water level is equal to the reference water level, the pump will stop working, and so on, forming a real-time feedback and real-time control Closed-loop water level monitoring system. In order to make the water level value measured by the detector truly reflect the water level in various parts of the water tank, the number of water level detectors can be increased and distributed evenly on the water surface; If there is any disturbance, you can set up 4 outlets of drain pipes and collect them into one pipe, and then install the drain pump on the main pipe after collection; the 4 drain pipes can be evenly arranged at the bottom of the water tank (low The lowest water level of the water tank, ensure that the drain pipe is pressurized, and leave a certain pressure margin).
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| CN108827591B (en) * | 2018-04-02 | 2024-07-19 | 北京大学 | A gravity-type circulating water tunnel for drag reduction measurement of complex underwater surfaces |
| CN116989509A (en) * | 2023-08-18 | 2023-11-03 | 宁波奥克斯电气股份有限公司 | A method for collaboratively regulating water pressure and flow of a heat pump water module and a heat pump system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101266192A (en) * | 2008-04-18 | 2008-09-17 | 浙江大学 | Constant pressure water supply system under variable liquid level |
| CN103049009A (en) * | 2012-03-31 | 2013-04-17 | 邵阳学院 | Continuous water level control system based on singlechip |
| CN202956673U (en) * | 2012-11-14 | 2013-05-29 | 成都卓程科技有限公司 | Automatic control system based on liquid level of single water tank |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2677984B2 (en) * | 1982-08-31 | 1997-11-17 | 神鋼電機株式会社 | Water level control method for waterway system |
| JP2839731B2 (en) * | 1991-03-06 | 1998-12-16 | 株式会社東芝 | Control method of hydroelectric power plant with discharge valve |
| CN2777677Y (en) * | 2005-01-26 | 2006-05-03 | 武汉大学 | Water tank for teaching experiment |
| CN100514239C (en) * | 2005-06-30 | 2009-07-15 | 上海柴油机股份有限公司 | Liquid level water level automatic control system |
| CN100416254C (en) * | 2005-09-27 | 2008-09-03 | 河海大学 | Teaching and experimental device for surge room |
| CN102288384B (en) * | 2011-07-28 | 2012-11-21 | 水利部交通运输部国家能源局南京水利科学研究院 | Large-scale unsteady flow decompression box |
| CN203629870U (en) * | 2013-12-20 | 2014-06-04 | 武汉大学 | Surge-chamber resistance coefficient measurement system used for model debugging |
| CN204374792U (en) * | 2014-12-15 | 2015-06-03 | 武汉大学 | A kind of water level control apparatus of sealing type cistern |
| CN104458316B (en) * | 2014-12-31 | 2017-02-22 | 武汉大学 | Overall physical model test platform for transient process of hydropower station |
-
2014
- 2014-12-15 CN CN201410770267.9A patent/CN104503492B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101266192A (en) * | 2008-04-18 | 2008-09-17 | 浙江大学 | Constant pressure water supply system under variable liquid level |
| CN103049009A (en) * | 2012-03-31 | 2013-04-17 | 邵阳学院 | Continuous water level control system based on singlechip |
| CN202956673U (en) * | 2012-11-14 | 2013-05-29 | 成都卓程科技有限公司 | Automatic control system based on liquid level of single water tank |
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