阅读说明：本技术 转桶式大坝渗流量仪及其控制方法 (Rotary barrel type dam seepage flow instrument and control method thereof ) 是由 罗孝兵 李学胜 简树明 郑水华 丁玉江 卢欣春 赵盛杰 陈宏伟 熊成龙 杨东 张 于 2021-07-27 设计创作，主要内容包括：本发明提供一种转桶式大坝渗流量仪及其控制方法,流量仪包括仪器支撑部件、连接在所述仪器支撑部件上的容器以及执行器；所述仪器支撑部件包括支撑轴；所述支撑轴上固定安装有液位计,所述支撑轴在下部固定设置有密封器和自清洁装置；所述容器通过轴承与所述支撑轴转动连接,所述容器的上盖开设有用于导入水的开口,所述容器的底板上设置有排水口和排水管；所述执行器驱动所述容器绕支撑轴转动,所述排水口和排水管随着容器一起转动,使容器切换为复位位置或测量位置,并通过与所述液位计相连接计算获取流量值。本发明的仪器不仅能应用常规大坝渗流量监测工况,在一些高度受限的工况场景或含有泥沙、杂质较多的工况场景也能使用,大大拓展了应用空间。(The invention provides a rotary barrel type dam seepage flow instrument and a control method thereof, wherein the flow instrument comprises an instrument supporting part, a container connected with the instrument supporting part and an actuator; the instrument support member comprises a support shaft; the supporting shaft is fixedly provided with a liquid level meter, and the lower part of the supporting shaft is fixedly provided with a sealer and a self-cleaning device; the container is rotationally connected with the supporting shaft through a bearing, an opening for guiding water is formed in the upper cover of the container, and a water outlet and a water drainage pipe are arranged on the bottom plate of the container; the actuator drives the container to rotate around the supporting shaft, the water outlet and the water discharge pipe rotate along with the container, the container is switched to a reset position or a measuring position, and the flow value is obtained through calculation by being connected with the liquid level meter. The instrument can be applied to the conventional dam seepage flow monitoring working condition and can also be used in working condition scenes with limited height or working condition scenes containing more silt and impurities, so that the application space is greatly expanded.)

1. The rotating barrel type dam seepage flow instrument is characterized in that: comprises an instrument supporting part, a container connected with the instrument supporting part and an actuator;

the instrument supporting part comprises a supporting bottom plate, a supporting shaft arranged on the supporting bottom plate, a plurality of supporting rods arranged on the supporting bottom plate, a connecting support plate arranged at the lower part of each supporting rod and an upper supporting plate arranged at the tops of the supporting rods; the upper supporting plate is provided with a drainage tube for guiding water into the container; a liquid level meter is fixedly arranged on the supporting shaft, and a sealer is fixedly connected below the liquid level meter and clings to the bottom of the container;

the container is arranged between the support plate and the upper support plate and is rotationally connected with the support shaft through a bearing, an opening for guiding water is formed in an upper cover of the container, and a water outlet and a water drainage pipe are formed in a bottom plate of the container;

the actuator is used for driving the container to rotate around the supporting shaft, driving the water outlet and the water discharge pipe to rotate, enabling the container to be switched to a reset position or a measurement position, and connecting the container with the liquid level meter to calculate and obtain a flow value;

when the container is in a reset position, the drainage pipe is positioned right below the drainage pipe, and the drainage port is in an open state;

when the container is in the measuring position, the drain pipe is far away from the position right below the drainage pipe, and the drain opening is sealed by the sealer.

2. The rotating barrel dam seepage flow instrument according to claim 1, characterized in that: the actuator is arranged on the upper supporting plate and comprises a measurement and control circuit, and a motor, a position feedback device, a position sensor and a position indicator which are all connected with the measurement and control circuit;

an output shaft of the motor is fixedly connected with the top of the container and used for driving the container to rotate;

the position feedback device is used for feeding back the position state of the container to the position sensor;

the position sensor is used for feeding back a container position signal to the measurement and control circuit;

the position indicator is used for synchronously indicating the position state of the container;

the measuring and controlling circuit is communicated with remote equipment through a communication interface arranged to acquire a measuring instruction and transmission data, controls the motor according to the measuring instruction and a container position signal, and calculates a flow value according to a signal of the liquid level meter and a preset flow calibration parameter.

3. The rotating barrel dam seepage flow instrument according to claim 2, characterized in that: the liquid level meter is a float type liquid level meter and comprises a guide rod and a liquid level switch which are arranged on a supporting shaft through a connecting rod; the liquid level switch is connected with the measurement and control circuit; the liquid level switch comprises a floater and a position switch, the floater is sleeved on the guide rod, and the position switch is embedded in a preset position in the guide rod.

4. The rotating barrel dam seepage flow instrument according to claim 2, characterized in that: a self-cleaning device is fixedly connected to the bottom of the container, which is close to the lower part of the liquid level meter; when the measurement and control circuit obtains a self-cleaning instruction or every time preset time passes, the measurement and control circuit controls the motor to drive the container to rotate back and forth around the supporting shaft so as to clean the interior of the container.

5. The rotating barrel dam seepage flow instrument according to claim 4, wherein: the self-cleaning device is a cleaning brush and/or an ultrasonic cleaning device.

6. The rotating barrel dam seepage flow instrument according to claim 1, characterized in that: the outer cover of the liquid level meter is provided with a wave breaker, and an opening is reserved at the upper end of the wave breaker.

7. The rotating barrel dam seepage flow instrument according to claim 1, characterized in that: the sealer is a silicon rubber sealer.

8. A method for controlling a flow meter of a barrel dam according to any one of claims 1 to 7, comprising the steps of:

driving the container to rotate reversely, and stopping the container when the receiving container reaches the reset position state information;

driving the container to rotate in the positive direction, and stopping the container when the receiving container reaches the state information of the measuring position;

when receiving a liquid level zero signal output by the liquid level meter, starting timing; when a liquid level signal output by the liquid level meter and reaching a full scale point is received, timing is stopped; and calculating and storing a flow value according to the timing duration and preset flow calibration parameters.

9. The method of controlling a rotating barrel dam flow meter according to claim 8, further comprising a self-cleaning device fixedly attached to the support shaft proximate the bottom of the vessel, said method further comprising a flow meter self-cleaning method, said flow meter self-cleaning method comprising the steps of:

step A: when a self-cleaning instruction is obtained or preset time passes, the container is driven to rotate reversely, and when the receiving container reaches the reset position state information, the driving motor is stopped, and the position indicator is controlled to synchronously indicate to the reset position;

and B: driving the container to rotate forwards to a cleaning end point position, and then driving the container to rotate backwards to a reset position;

and C: and C, controlling an actuator to automatically control according to the preset parameters, and repeatedly executing the step B until the set cleaning times are finished.

Technical Field

The invention belongs to the technical field of water conservancy measurement, and particularly relates to a rotary barrel type dam seepage flow instrument and a control method thereof.

Background

Seepage flow monitoring is an important project for dam safety monitoring. The dam seepage flow directly reflects the safety condition in the dam structure body, and when the seepage flow reaches a certain amount, the safety of the dam is directly influenced. Therefore, the dam seepage flow is one of important physical quantities for monitoring the safe operation of the dam and the hydraulic structure thereof. At present, the automatic measurement of the seepage flow with a large flow rate of 1-300L/s is mainly and indirectly realized by a water measuring weir method. The weir measurement method is to make the fluid to be measured flow through a weir plate (such as a triangular weir, a rectangular weir, etc.) with a certain shape, and calculate the flow of the fluid to be measured by measuring the height of the water head of the fluid on the weir plate and combining different empirical formulas corresponding to different shapes. The flow meter has a fatal defect that when the flow is very small or the shape of the weir plate is changed due to dirt deposition and the like, a fitting formula is seriously inconsistent with the field condition, and the calculated flow is very inaccurate or even wrong.

At present, the flow less than 1L/s is mainly monitored manually, so that the labor intensity is high, the working efficiency is low, and the real-time performance is poor; a part of automatic measuring instruments are also put into use, the invention patent of dam seepage flow high-precision flow meter (CN 101339066B) discloses a dam seepage flow high-precision flow meter, the novel patent of dam seepage flow meter (CN 203672428) discloses a dam seepage flow meter, the invention patent of high-precision small-flow seepage flow automatic measuring method (CN 111811596) discloses a high-precision small-flow seepage flow automatic measuring method, however, because calcified substances and powdery impurities exist in fluid seeped out of a dam body and a building, the impurities can not be filtered out by a filter screen because of being tiny, and the small-flow seepage flow can accumulate a large amount of impurities and incrustation substances generated by the calcified substances after passing through the dam body and the building for a long time, because the instruments all adopt valves to drain water or control the direction of water flow, under the working condition that silt exists in the water flow, the valves can be blocked or can not be completely closed because of the silt entering the water flow, the problem of abnormal measurement occurs, and the reliability is poor. And the existing automatic seepage flow measuring instrument is not provided with a self-cleaning device, and after the instrument is used for a long time, the instrument is frequently required to be manually disassembled particularly under the working conditions of multiple impurities and silt, so that the internal cleaning work is carried out, the maintenance workload is large, and the cost is high.

In addition, the existing volumetric seepage automatic measuring instrument occupies a certain height space due to a movable water inlet pipeline, and in the actual working condition of dam engineering, the height space of a small seepage monitoring water diversion port is limited under many conditions, so that the phenomenon that the instrument cannot be installed occurs.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, provides a rotating barrel type dam seepage flow instrument and a control method thereof, overcomes the defect that a valve is used for small seepage flow measurement in the prior art, can monitor small seepage flow, and has higher measurement reliability.

In order to achieve the purpose, the invention is realized by adopting the following technical scheme:

in a first aspect, the invention provides a rotating barrel type dam seepage flow instrument, which comprises an instrument supporting part, a container connected to the instrument supporting part and an actuator;

the instrument supporting part comprises a supporting bottom plate, a supporting shaft arranged on the supporting bottom plate, a plurality of supporting rods arranged on the supporting bottom plate, a connecting support plate arranged at the lower part of each supporting rod and an upper supporting plate arranged at the tops of the supporting rods; a guide pipe for guiding water into the container is arranged on the upper supporting plate; a liquid level meter is fixedly arranged on the supporting shaft, and a sealer is fixedly connected below the liquid level meter and clings to the bottom of the container;

the container is arranged between the support plate and the upper support plate and is rotationally connected with the support shaft through a bearing, an opening for guiding water is formed in an upper cover of the container, and a water outlet and a water drainage pipe are formed in a bottom plate of the container;

the actuator is used for driving the container to rotate around the supporting shaft, driving the water outlet and the water discharge pipe to rotate, enabling the container to be switched to a reset position or a measurement position, and connecting the container with the liquid level meter to calculate and obtain a flow value;

when the container is in a reset position, the drainage pipe is positioned right below the drainage pipe, and the drainage port is in an open state;

when the container is in the measuring position, the drain pipe is far away from the position right below the drainage pipe, and the drain opening is sealed by the sealer.

Furthermore, the actuator is arranged on the upper supporting plate and comprises a measurement and control circuit, and a motor, a position feedback device, a position sensor and a position indicator which are all connected with the measurement and control circuit;

an output shaft of the motor is fixedly connected with the top of the container and used for driving the container to rotate;

the position feedback device is used for feeding back the position state of the container to the position sensor;

the position sensor is used for feeding back a container position signal to the measurement and control circuit;

the position indicator is used for synchronously indicating the position state of the container;

the measuring and controlling circuit is communicated with remote equipment through a communication interface arranged to acquire a measuring instruction and transmission data, controls the motor according to the measuring instruction and a container position signal, and calculates a flow value according to a signal of the liquid level meter and a preset flow calibration parameter.

Further, the method for controlling the motor by the measurement and control circuit according to the measurement instruction and the container position signal and calculating the flow value according to the signal of the liquid level meter and the preset flow calibration parameter comprises the following steps:

the measurement and control circuit controls the motor to drive the container to rotate to a reset position so as to drain liquid in the container;

the measurement and control circuit controls the motor to drive the container to rotate to a measurement position for measurement;

under the measuring position, as the liquid level in the container continues to rise, when the liquid level reaches the measuring zero point, the liquid level switch outputs a liquid level zero point signal to the measuring and controlling circuit, and the measuring and controlling circuit starts to time; the liquid level continues rising, when the liquid level reaches the full measurement level, the liquid level switch outputs a signal that the liquid level reaches the full measurement level point to the measurement and control circuit, and the measurement and control circuit stops timing; and the measurement and control circuit calculates and stores the flow value according to the timing duration and the preset flow calibration parameter.

Further, the liquid level meter is a float type liquid level meter and comprises a guide rod and a liquid level switch which are arranged on the supporting shaft through a connecting rod; the liquid level switch is connected with the measurement and control circuit; the liquid level switch comprises a floater and a position switch, the floater is sleeved on the guide rod, and the position switch is embedded in a preset position in the guide rod.

Further, a self-cleaning device is fixedly connected to the bottom of the container, which is close to the lower part of the liquid level meter; when the measurement and control circuit obtains a self-cleaning instruction or every time preset time passes, the measurement and control circuit controls the motor to drive the container to rotate back and forth around the supporting shaft so as to clean the interior of the container.

Further, the self-cleaning device is a cleaning brush and/or an ultrasonic cleaning device.

Furthermore, the liquid level meter outer cover is provided with a wave breaker, and an opening is reserved at the upper end of the wave breaker.

Further, the sealer is a silicone rubber sealer.

In a second aspect, the present invention provides a method for controlling a flow meter of a rotating barrel dam, based on the first aspect, including the following steps:

driving the container to rotate reversely, and stopping the container when the receiving container reaches the reset position state information;

driving the container to rotate in the positive direction, and stopping the container when the receiving container reaches the state information of the measuring position;

when receiving a liquid level zero signal output by the liquid level meter, starting timing; when a liquid level signal output by the liquid level meter and reaching a full scale point is received, timing is stopped; and calculating and storing a flow value according to the timing duration and preset flow calibration parameters.

Further, the rotating barrel type dam flow instrument further comprises a self-cleaning device fixedly connected to the bottom of the container in a clinging mode, the method further comprises a flow instrument self-cleaning method, and the flow instrument self-cleaning method comprises the following steps:

step A: when a self-cleaning instruction is obtained or preset time passes, the container is driven to rotate reversely, and when the receiving container reaches the reset position state information, the driving motor is stopped, and the position indicator is controlled to synchronously indicate to the reset position;

and B: driving the container to rotate forwards to a cleaning end point position, and then driving the container to rotate backwards to a reset position;

and C: and C, controlling an actuator to automatically control according to the preset parameters, and repeatedly executing the step B until the set cleaning times are finished.

Compared with the prior art, the invention has the following beneficial effects:

1. the invention controls the water flow direction by rotating the container, realizes the separation of measurement and drainage, solves the problems of inaccurate instrument measurement value and incapability of long-term stable measurement due to the fact that the seepage fluid of the dam contains a large amount of powdery impurities and calcifications which are deposited on the instrument, and solves the problem of unreliable instrument caused by valve or untight closing by adopting a valve-free design;

2. the invention designs an automatic cleaning device, the instrument is provided with a container self-cleaning device, the cleaning work in the container can be automatically completed under the control of a measurement and control circuit of an actuator, the service life of the instrument is prolonged, the structure is simplified, the maintenance is convenient, the range of the working condition is expanded, and the automatic cleaning device has good popularization and application values.

3. The invention adopts the seepage flow measuring method of rotating the measuring container, can realize the control of the water flow direction only by rotating the measuring container directly connected with the motor, has simple transmission mechanism and improves the working reliability of the instrument.

4. The invention has simple structure and low height of the water inlet of the instrument, so that the instrument is more suitable for the working condition with limited height, and the technical scheme of the invention has no valve, thereby avoiding the phenomenon of blocking due to impurities or silt, reducing the fault probability of the instrument and improving the reliability of the long-term measurement work of the instrument.

5. In the invention, the instrument is provided with the wave breaker, so that the influence of water waves on measurement can be reduced, and the measurement precision and stability are improved.

6. In the invention, the measuring and controlling circuit, the position state feedback device, the inductor, the motor and the like are integrated into the actuator, so that the integration of instruments, the local calculation of final values and the digitization are realized, and the problem of easy interference of long cable transmission sensor information is eliminated.

Drawings

FIG. 1 is a sectional view showing the whole structure of a seepage gauge of a rotary barrel dam according to the present invention;

fig. 2 is an internal structure diagram of an actuator of the barrel-rotating dam seepage flow instrument.

In the figure: 1. a support base plate; 12. a support shaft; 2. a support plate is connected; 3. a sealer; 4. a liquid level switch; 5. a wave breaker; 6. a container; 61. a water outlet; 62. an upper cover; 63. a base plate; 7. a guide bar; 8. a support bar; 9. an actuator; 91. a position sensor; 92. a measurement and control circuit; 93. a position feedback device; 94. a position indicator; 95. a motor; 10. an upper support plate; 11. a drainage tube; 13. a drain pipe; 14. a self-cleaning device; 15. and a bearing.

Detailed Description

The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

In the description of the present embodiment, it should be noted that, as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the indicated orientation or positional relationship thereof is based on the orientation or positional relationship shown in the drawings, and is only for convenience of describing the present embodiment and simplifying the description, but does not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, cannot be construed as limiting the present embodiment.

The first embodiment is as follows:

the embodiment provides a rotating barrel type dam seepage flow instrument, which comprises an instrument supporting part, a container 6 connected to the instrument supporting part and an actuator 9, as shown in figure 1.

The instrument supporting part comprises a supporting base plate 1, a supporting shaft 12 arranged on the supporting base plate 1, a plurality of supporting rods 8 arranged on the supporting base plate 1, a receiving plate 2 arranged on the supporting rods 8 and an upper supporting plate 10 arranged at the tops of the supporting rods 8; a guide pipe for guiding water into the container 6 is arranged on the upper supporting plate 10; the supporting shaft 12 is fixedly provided with a liquid level meter, and the lower part of the supporting shaft 12 is fixedly provided with a sealer 3 and a self-cleaning device 14.

The container 6 is rotatably connected with the support shaft 12 through a bearing 15, an opening corresponding to the position of the flow guide pipe is formed in an upper cover 62 of the container 6, and a water outlet 61 and a water discharge pipe 13 are arranged on a container bottom plate 63 of the container 6.

The actuator 9 drives the container 6 to rotate around the supporting shaft 12, the water outlet 61 and the water outlet pipe 13 rotate together with the container 6, so that the container 6 is switched to a reset position or a measuring position, and a flow value is obtained through calculation by being connected with the liquid level meter;

when the container 6 is at the reset position, the drainage pipe 13 is positioned right below the drainage pipe 11, the water in the drainage pipe 11 flows into the drainage pipe 13 to be drained away, and the drainage port 61 is in an open state;

when the container 6 is at the measuring position, the drainage pipe 13 is far away from the position right below the drainage pipe 11, the water in the drainage pipe 11 does not flow into the drainage pipe 13 at all, and the drainage port 61 is sealed by the sealer 3.

The implementation principle is as follows: the container 6 can be driven by the actuator 9 fixed on the upper support plate 10 through the upper cover 62 and rotate around the support shaft 12 through the bearing 15 installed on the support shaft 12, and the water outlet 61 of the container 6 and the water outlet pipe 13 installed on the bottom plate of the container 6 rotate together with the container 6 to control the water flow direction.

The direction of water flow is controlled by rotating the container 6, so that the separation of measurement and drainage is realized, the problems of inaccurate instrument measurement value and incapability of long-term stable measurement caused by the fact that a large amount of powdery impurities and calcifications are contained in seepage fluid of a dam and are deposited on an instrument are solved, and meanwhile, the problem of unreliable instrument caused by the fact that a valve is not closed tightly is solved by adopting a valve-free design.

Example two:

as shown in fig. 1, the seepage flow meter of the rotating barrel type dam of the present embodiment includes: an instrument supporting member consisting of a supporting shaft 12 mounted on an instrument supporting base plate 1, a plurality of supporting rods 8 mounted on the periphery of the instrument supporting base plate 1, a receiving plate 2 mounted on the supporting rods 8, and an upper supporting plate 10 mounted on the plurality of supporting rods 8, an actuator 9 mounted on the supporting plate 10, a bearing 15 mounted on the supporting shaft 12, a container 6 mounted on the bearing 15, a wave breaker 5 and a guide rod 7 mounted on the supporting shaft 12, a level switch 4 fitted on the guide rod 7, a sealer 3 and a self-cleaning device 14 mounted on the lower end of the wave breaker 5, a drainage tube 11 mounted on the upper supporting plate 10, and a drainage tube 13 mounted on a bottom plate 63 of the container 6.

Fig. 2 shows the internal components of the actuator 9, which includes a motor 95, a measurement and control circuit 92, a position feedback device 93, a position sensor 91, and a position indicator 94.

The upper end of the wave breaker 5 in fig. 1 is left open (not shown) for communication of air between the inside and the outside.

The sealing material of the sealer 3 in fig. 1 is silicone rubber.

The self-cleaning device 14 in fig. 1 employs a cleaning brush in the present embodiment.

The container 6 in fig. 1 is connected with a rotating shaft (not marked in the figure) of a motor 95 of the actuator 9 through an upper cover 62 and is connected with the periphery of the bearing 15 through a bottom plate 63, a water outlet 61 is arranged on the bottom plate 63 of the container 6, and an opening (not marked in the figure) is arranged on the upper cover 62 of the container 6; draft tube 11 directs the flow of water into vessel 6 through an opening in upper cover 62 of vessel 6.

In the embodiment of the present invention shown in fig. 1, the container 6 is driven by the motor 95 of the actuator 9 fixed on the upper support plate 10 through the upper cover 62, and rotates around the support shaft 12 through the bearing 15 installed on the support shaft 12, and the water discharge port 61 of the container 6 and the water discharge pipe 13 installed on the bottom plate 63 of the container 6 rotate together with the container 6 to control the water flow direction.

When the measurement is not carried out normally, the container 6 is in the reset position, the water flow in the drainage tube 11 flows into the drainage tube 13 arranged on the bottom plate 63 of the container 6 to be directly drained away, the drainage port 61 at the bottom of the container 6 is in a completely open state, and no water is accumulated in the container 6; the level switch 4 returns to the lowermost end of the guide rod 7.

The measuring working process of the embodiment of the rotating barrel type dam seepage flow instrument of the invention is as follows:

(1) measurement preparation, firstly, a container 6 position resetting process is executed, a measurement and control circuit 92 in an actuator 9 controls a motor 95 to drive the container 6 to rotate reversely, and a position feedback device 93 in the actuator 9 synchronously feeds back the position state of the container 6 to a position sensor 91; when the container 6 returns to the reset position, the position sensor 91 feeds back the state that the container 6 reaches the reset position to the measurement and control circuit 92, the measurement and control circuit 92 stops driving the motor 95, and the position indicator 94 synchronously indicates the reset position; in the state of the container 6 at the reset position, the water in the drainage tube 11 flows into the drainage tube 13 mounted on the bottom plate 63 of the container 6 and is directly drained away, the drainage port 61 at the bottom of the container 6 is in a completely open state, and no water is accumulated in the container 6.

(2) Starting measurement, controlling a motor 95 by a measurement and control circuit 92 of an actuator 9 to drive the container 6 to rotate in the forward direction, and synchronously feeding the position state of the container 6 back to the position sensor 91 by a position feedback device 93 in the actuator 9; when the container 6 rotates to reach the measuring position, the position sensor 91 feeds back the state that the container 6 reaches the measuring position to the measuring and controlling circuit 92, the measuring and controlling circuit 92 stops driving the motor 95, and the position indicator 94 synchronously indicates the measuring position; in the state that the container 6 is at the measuring position, the water in the drainage tube 11 flows into the container 6 completely, and at the same time, the water outlet 61 at the bottom of the container 6 is sealed by the sealer 3 fixed at the lower end of the wave breaker 5, and the water in the container 6 does not flow out.

(3) Measuring, wherein the liquid level gradually rises along with the increase of the water amount, and when the liquid level reaches the wave breaker 5, the water waves on the liquid level are blocked, so that the waves on the liquid level in the wave breaker 5 are reduced; when the liquid level switch 4 reaches a measurement zero point along the guide rod 7 along with the continuous rise of the liquid level, the liquid level switch 4 outputs a liquid level zero point signal, and a measurement and control circuit 92 in the actuator 9 starts to time; the liquid level continues to rise, when the liquid level switch 4 reaches the full-scale measurement along the guide rod 7, the liquid level switch 4 outputs a signal that the liquid level reaches the full-scale point, and the measurement and control circuit 92 in the actuator 9 stops timing; the measurement and control circuit 92 calculates a flow value according to the timing value and a preset flow calibration parameter, and stores the flow value in a memory of the measurement and control circuit 92, and the remote acquisition device can acquire flow value data through a communication interface of the measurement and control circuit 92.

(4) Finishing measurement, controlling a motor 95 by a measurement and control circuit 92 in the actuator 9 to drive the container 6 to rotate reversely, and synchronously feeding the position state of the container 6 back to the position sensor 91 by a position feedback device 93 in the actuator 9; when the container 6 rotates reversely to reach the reset position, the position sensor 91 sends the state that the container 6 reaches the reset position to the measurement and control circuit 92, the measurement and control circuit 92 stops driving the motor 95, and the position indicator 93 synchronously indicates the reset position; when the container 6 is in a reset position state, all water flow in the drainage tube 11 flows into the drainage pipe 13 to be directly drained away; at the same time, the drain port 61 on the bottom plate 63 of the container 6 is completely opened, and no water is blocked by the sealer 3, and the water in the container 6 flows out, and no water is finally accumulated in the container 6.

The barrel-rotating dam seepage flow instrument is also designed with a self-cleaning function, and the self-cleaning working process of the embodiment is as follows:

(1) self-cleaning preparation, firstly, a measurement and control circuit 92 in an actuator 9 controls and executes a container 6 position resetting process to reset the container 6 to a resetting position; then, the motor 95 is controlled by the measurement and control circuit 92 in the actuator 9 to drive the movable container 6 to rotate forward to the cleaning start position (in this embodiment, the cleaning start position and the measurement position are unified to be the same position).

(2) Cleaning, a motor 95 is controlled by a measurement and control circuit 92 in an actuator 9, the movable container 6 is driven to rotate forwards to a cleaning end point position, after a little stopping, the measurement and control circuit 92 in the actuator 9 controls the motor 95 again, and the movable container 6 is driven to rotate reversely to a cleaning start point position (in the embodiment, the cleaning end point position is set to a position which starts to rotate forwards by 300 degrees from the cleaning start point, and the position is set to the principle that the sealer 3 cannot collide with the drain pipe 13 but is as close to the drain pipe 13 as possible); in the rotating process of the container 6, the water flow of the drainage tube 11 flows into the container 6, and the self-cleaning device 14 arranged at the lower end of the wave breaker 5 removes silt, impurities, dirt and the like at the bottom of the self-cleaning container 6, and the cleaned silt, impurities, dirt and the like which enter the water flow of the container 6 along with the water flow, and the silt, impurities, dirt and the like are removed through the water outlet 61 on the bottom plate 63 of the container 6.

(3) And (3) controlling the actuator 9 to automatically control according to the set parameters, and repeatedly executing the cleaning process in the step (2) until the set cleaning times are finished.

(4) Finishing cleaning, and controlling and executing a container 6 position resetting process by a measurement and control circuit 92 in the actuator 9 to enable the container 6 to return to a resetting position; in this position, the water in the draft tube 11 flows into the drain tube 13 mounted on the bottom plate 63 of the vessel and is directly drained away, and the drain opening 61 at the bottom of the vessel 6 is in a fully opened state, and no water is accumulated in the vessel 6.

The invention adopts the seepage flow measuring method of rotating the measuring container 6 (called as rotating barrel type), only rotates the measuring container 6 directly connected with the motor 95 to realize the control of the water flow direction, the transmission mechanism is simple, and the working reliability of the instrument is improved. The water flow control part of the invention only comprises a rotatable measuring container 6, a fixed water inlet pipe, a water outlet pipe 13 and a water outlet 61 sealer 3 at the bottom of the container 6, the structure is simple, the height of the water inlet of the instrument is low, and the instrument is more suitable for the working condition with limited height. The technical scheme of the invention has no valve, so that the phenomenon of blocking due to impurities or silt can not occur, the fault probability of the instrument is reduced, and the reliability of long-term measurement work of the instrument is improved. In the invention, the instrument is provided with the wave breaker 5, so that the influence of water waves on measurement can be reduced, and the measurement precision and stability are improved. In the invention, the instrument is provided with a container 6 self-cleaning device 14, and can automatically complete the cleaning work inside the container 6 under the control of a measurement and control circuit 92 of an actuator 9. In addition, in the invention, the measurement and control circuit 92, the position state feedback device, the sensor, the motor 95 and the like are integrated into the actuator 9, so that the integration of instruments, the local calculation of final values and the digitization are realized, and the problem of easy interference of long cable transmission sensor information is solved.

The motor 95 of the present invention is not limited to the ordinary deceleration dc motor 95, and may be a stepping motor 95, a servo motor 95, or the like. The liquid level meter is not limited to a float type, and can also adopt a pressure type and the like, all sensors capable of sensing the height change of the liquid level can realize the liquid level monitoring work, and finally calculate the flow value. The sealing material of the sealer 3 is not limited to rubber, and may be other soft materials resistant to high and low temperatures and abrasion. The self-cleaning device 14 is not limited to a cleaning brush, and may be a device capable of performing an automatic cleaning function, such as an ultrasonic cleaning device.

The control method of the measurement and control circuit 92 comprises the following steps:

the control motor 95 drives the container 6 to rotate reversely, when the container 6 sent by the position sensor 91 reaches the reset position state information, the drive motor 95 is stopped, and the control position indicator 94 synchronously indicates the reset position;

controlling the motor 95 to drive the container 6 to rotate forward, stopping driving the motor 95 when the container 6 sent by the position sensor 91 reaches the state information of the measuring position, and controlling the position indicator 94 to synchronously indicate the measuring position;

when receiving a liquid level zero signal output by the liquid level meter, starting timing; when a liquid level signal output by the liquid level meter is received and reaches a full scale point, a measurement and control circuit 92 in the actuator 9 stops timing; calculating a flow value according to the timing duration and preset flow calibration parameters, and storing the flow value in a memory of the measurement and control circuit 92;

the control motor 95 drives the container 6 to rotate in the reverse direction, and when the container 6 reaches the reset position state information sent by the position sensor 91, the drive motor 95 is stopped, and the control position indicator 94 synchronously indicates the reset position.

The method also comprises a flow meter self-cleaning method, and the flow meter self-cleaning method comprises the following steps:

when a self-cleaning instruction is acquired or every preset time passes, the control motor 95 drives the container 6 to rotate reversely, and when the container 6 sent by the position sensor 91 reaches the reset position state information, the drive motor 95 is stopped, and the control position indicator 94 synchronously indicates the reset position;

controlling the motor 95 to drive the container 6 to rotate forward for cleaning until reaching the cleaning end point, and then controlling the motor 95 to drive the container 6 to rotate reversely for cleaning until reaching the reset position;

and controlling the actuator 9 to automatically control according to the preset parameters, and repeatedly executing the cleaning process until the set cleaning times are finished.

Example three:

the embodiment provides a control method of a rotating barrel type dam flow instrument, which is based on the rotating barrel type dam flow instrument described in the embodiment two. The measurement and control circuit controls the motor according to the measurement instruction and the container position signal, and calculates the flow value according to the signal of the liquid level meter and the preset flow calibration parameter, and the method comprises the following specific steps:

the measurement and control circuit controls the motor to drive the container to rotate to a reset position so as to drain liquid in the container;

the measurement and control circuit controls the motor to drive the container to rotate to a measurement position for measurement;

under the measuring position, as the liquid level in the container continues to rise, when the liquid level reaches the measuring zero point, the liquid level switch outputs a liquid level zero point signal to the measuring and controlling circuit, and the measuring and controlling circuit starts to time; the liquid level continues rising, when the liquid level reaches the full measurement level, the liquid level switch outputs a signal that the liquid level reaches the full measurement level point to the measurement and control circuit, and the measurement and control circuit stops timing; and the measurement and control circuit calculates and stores the flow value according to the timing duration and the preset flow calibration parameter.

The control method specifically comprises the following steps:

driving the container to rotate reversely, and stopping the container when the receiving container reaches the reset position state information;

driving the container to rotate in the positive direction, and stopping the container when the receiving container reaches the state information of the measuring position;

when receiving a liquid level zero signal output by the liquid level meter, starting timing; when a liquid level signal output by the liquid level meter and reaching a full scale point is received, timing is stopped; and calculating and storing a flow value according to the timing duration and preset flow calibration parameters.

The method also comprises a flow meter self-cleaning method, and the flow meter self-cleaning method comprises the following steps:

step A: when a self-cleaning instruction is obtained or preset time passes, the container is driven to rotate reversely, and when the receiving container reaches the reset position state information, the driving motor is stopped, and the position indicator is controlled to synchronously indicate to the reset position;

and B: driving the container to rotate forwards to a cleaning end point position, and then driving the container to rotate backwards to a reset position;

and C: and C, controlling an actuator to automatically control according to the preset parameters, and repeatedly executing the step B until the set cleaning times are finished.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature, and in the description of the invention, "plurality" means two or more unless explicitly specifically defined otherwise.

In the present invention, unless otherwise specifically stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

In the description herein, reference to the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention.