JP2019002390A - Pump device and operation support method thereof - Google Patents

Abstract

A pump device having a simple structure and capable of easily grasping the degree or possibility of falling into water. A pump device (10) includes a pump (13) having an impeller (21) and a pump casing (20), a vacuum pump (30) for sucking liquid into the pump casing by vacuuming the pump casing (20), and the pump casing (20). A drive source 17 that drives the impeller 21 with the liquid filled therein, and a water fall degree calculator that calculates the water level in the pump casing 20 and calculates the water fall degree of the pump based on the calculated water level information. A display unit 41 for outputting and displaying information on the calculated degree of overboard. [Selection drawing] Fig. 3

Description

  The present invention relates to a pump device for draining liquid such as inflow water from a river and an operation support method thereof.

  In a pump device that drains liquid such as river water, the pump device is activated by rotating the impeller after priming water into the pump casing and immersing the impeller in the liquid. Further, the pump device can be stopped by stopping the rotation of the impeller, introducing air into the pump casing, and discharging the liquid from the pump.

  During steady operation of the pump device, the liquid to be transferred may flow out of the pump casing due to its own weight due to a sealing failure due to deterioration of the seal member (falling water may occur). If water falls during steady operation, not only can the liquid not be transferred, but also the bearings and the like may be damaged by the idle rotation of the impeller. Therefore, an electrostatic capacity type or electrode type water level detector is provided in the suction pipe of the pump device, and when the falling water is detected during the steady operation, the pump device is immediately stopped so that the device accompanying the falling water I try to suppress damage.

  Moreover, in the pump apparatus described in Patent Document 1, it is determined that water is falling when the measured value of the parameter that varies according to the pump load reaches the first set value, and the second set value is set. It is disclosed that when it reaches, it is judged that a waterfall has occurred. Thereby, it is possible to prevent malfunction caused by contamination of the water level detector and to accurately detect whether liquid is present in the pump during steady operation.

Japanese Patent No. 4854478

  In the pump device described in the above-mentioned patent document, it is determined that water is falling. However, if the water is close to water, the pump casing is evacuated manually or automatically before the water reaches the water. It is desirable to restore the performance of the device. However, in the pump device according to the prior art, it has not been possible for the operator of the pump device to grasp the degree or the possibility of water drop. For this reason, it has been desired that appropriate guidance be provided so that workers can grasp the degree of water fall.

  The present invention has been made in view of the above, and it is an object of the present invention to provide a pump device and an operation support method thereof that can easily grasp the degree of water fall or the degree of possibility with a simple configuration.

  The pump device according to the present invention includes a pump having an impeller and a pump casing, a vacuum pump for sucking liquid into the pump casing by evacuating the pump casing, and the pump casing is filled with liquid. A drive source that drives the impeller in the state, a water level in the pump casing, and a water fall degree calculation unit that calculates the water fall degree of the pump based on the calculated water level information, and information on the calculated water fall degree And a display unit for outputting and displaying the above. As a result, it is possible to easily grasp the degree of water fall or the possibility of possibility with a simple configuration, and it is possible to take measures such as stopping the pump or starting the vacuum pump to perform the full water treatment. .

  In the pump device having the above-described configuration, when the degree of falling water exceeds a threshold value, it is preferable to perform the return process by starting the vacuum pump and evacuating the pump casing. By performing the return process before falling water, it is possible to prevent the pump device from being damaged due to falling water.

  Furthermore, it is preferable to provide a counter that counts the number of times the return process has been performed, and to display a warning on the display panel when the count value by the counter reaches a set value. Accordingly, for example, by notifying the operator of the pump device that the sealing member attached to the pump casing has deteriorated, it is possible to prevent the risk of water falling.

  An operation support method for a pump device according to the present invention is an operation support method in a pump device including a pump having an impeller and a pump casing, and the pump casing is evacuated to suck liquid into the pump casing. A step, a step of driving the impeller while the pump casing is filled with liquid, a water level in the pump casing, and a water level that calculates the water level of the pump based on the calculated water level information It is characterized by comprising a calculation step and a step of outputting and displaying information on the calculated water fall.

  According to the present invention, it is possible to easily grasp the degree of water fall or the degree of possibility with a simple configuration. The present invention is particularly effective when the pump equipment is operated by an inexperienced operator.

It is a schematic diagram which shows the structure of the pump apparatus which concerns on one Embodiment of this invention. It is a block diagram which shows the structure of pump equipment. It is a flowchart explaining operation | movement of a pump apparatus. It is explanatory drawing which shows the example of a display of a waterfall degree. It is a flowchart explaining operation | movement of the pump apparatus which concerns on another embodiment. It is a flowchart explaining operation | movement of the pump apparatus which concerns on another embodiment.

  Hereinafter, a horizontal axis pump facility according to an embodiment of the present invention will be described with reference to the drawings. However, the present invention is not limited to a horizontal axis (diagonal flow / axial flow) pump, but also to a centrifugal pump. Can be applied. In addition, the same code | symbol is attached | subjected to the component which is the same or it corresponds, and the overlapping description is abbreviate | omitted.

  FIG. 1 is a schematic diagram showing the configuration of the horizontal axis pump device 10, and a pump 13 that transfers liquid (inflowing water such as rainwater) from the suction water tank 11 to the discharge water tank 12, and the pump 13 and the suction water tank 11 communicate with each other. A suction pipe 15 that communicates with the pump 13 and the discharge water tank 12, a drive source 17 that drives the pump 13, and a discharge valve 18 that connects the discharge pipe 16 and the pump 13.

  The pump 13 includes a pump casing 20 and an impeller 21 accommodated in the pump casing 20. The impeller 21 is connected to a speed reducer (power transmission device) 22 via a rotating shaft, and the speed reducer 22 is connected to the drive source 17. The drive source 17 is, for example, an electric motor, which is driven by power supplied from a power source (not shown), and rotationally drives the impeller 21 via the speed reducer 22.

  The suction pipe 15 extends vertically, and the suction port 15 a is located inside the suction water tank 11. The pump 13 is installed on the installation floor 11a provided in the upper part of the suction water tank 11, and is smoothly connected with the suction pipe 15 through the curved pipe part. The discharge pipe 16 includes a discharge port 16a that opens in the discharge water tank 12. The discharge port 16a is located at a position lower than the pump 13 and higher than the suction port 15a. The discharge port 16a is provided with a flap valve 23 for preventing the back flow of the liquid transferred to the discharge water tank 12.

  A full water detector 26 having an electrode rod is provided in the upper part of the pump casing 20 via a gas-liquid separation mechanism 25, and the pump casing 20 is filled with liquid by the full water detector 26. Is detected. Further, the inside of the pump casing 20 is connected to the vacuum pump 30 via a full water detector 26 and an intake valve 27.

  The gas-liquid separation mechanism 25 includes a rotation prevention mechanism unit and a gas-liquid separation short tube, and has a structure described in, for example, Japanese Patent Application Laid-Open No. 2011-256769. The swirl prevention mechanism section prevents swirling flow (water film) generated on the inner wall of the pump casing 20 generated at the time of starting the pump and prevents water from flowing into the intake port. By separating the liquid mixture water (gas-liquid two-phase flow), there is an effect of forming an air reservoir near the intake port.

  When starting the pump device 10 according to the above configuration, first, with the discharge valve 18 fully closed, the vacuum pump 30 evacuates the inside of the pump casing 20 to form a negative pressure, and the suction pipe 15 The water level (pump water level) Lp is raised. Then, when the full water detector 26 detects that the inside of the pump casing 20 is filled with liquid, the drive unit 17 is activated and the impeller 21 rotates. Thereafter, the discharge valve 18 is opened, so that the liquid is transferred from the suction water tank 11 to the discharge water tank 12.

  As shown in FIG. 1, since the pump 13 is installed at a position higher than the liquid level of the suction water tank 11, if water falls during the steady operation of the pump device 10, the pump 13 falls into the drainage impossible state. . For this reason, the water fall detector 31 is provided at a position substantially the same height as the center of the pump 13 inside the pump casing 20. The water fall detector 31 is, for example, a capacitance type, electrode type, or tuning fork type sensor, and detects the presence or absence of water fall in the pump casing 20.

  A vacuum gauge 24 is provided on the upstream side of the impeller 21 inside the pump casing 20, and the degree of vacuum of the pump casing 20 is measured. Further, the pump device 10 is provided with a water level meter 33 for measuring the water level Ls of the suction water tank 11. Since the vacuum degree of the pump casing 20 is caused by the difference between the water level Ls of the suction water tank 11 and the water level Lp in the pump, the water level Lp in the pump is calculated from the vacuum level of the pump casing 20 and the water level Ls of the suction water tank 11. Can do.

  FIG. 2 is a block diagram showing an outline of the electrical configuration of the pump device 10, and each component such as the electric motor 17, the intake valve 27, the vacuum pump 30, the water fall detector 31, and the water level meter 33 described above includes a control unit. 40 to control its operation. Further, the pump device 10 includes a display panel 41 for displaying the operation status of the device and operation support information, an instruction for starting / stopping the pump 13 by the operator, a threshold value of water fall and a set value of a counter to be described later. An input unit 42 for inputting various information is provided. In addition, you may make it comprise the display panel 41 and the input part 42 with a touchscreen.

  The pump device 10 is provided with a water fall degree calculation unit 43 that calculates the water fall degree of the pump casing 20 and a counter 45. For example, the water fall degree calculation unit 43 determines that the water drop has occurred in the water drop detector 31 when the water level Lp in the pump is the upper limit value (that is, the state in which the inside of the pump casing 20 is completely filled with liquid) is 0%. The water level in the pump at this time is set to 100%, and the degree of water fall can be calculated based on the ratio between the calculated water level Lp in the pump and the set value of the water level in the pump.

  Alternatively, when a known ammeter and torque meter are added to the pump device 10 and the torque value and / or current value of the torque meter and water fall occur in a state where the pump casing 20 is entirely filled with liquid The torque value and / or the current value may be determined as set values, and the degree of water fall may be calculated based on the ratio between the measured torque value and these set values.

  The counter 45 counts the number of times that a falling water return process, which will be described later, has been performed. When the count value reaches a set value, the control unit 40 can seal a sealing member (for example, a pump casing) attached to the pump casing 20. It is determined that deterioration has occurred in the water leakage prevention member attached to the connecting portion between the drive unit 17 and the drive unit 17, and a message to that effect is output and displayed on the display panel 41.

  FIG. 3 is a flowchart showing the operation of the pump device 10 configured as described above. When the activation command for the pump 13 is issued by the control unit 40, the vacuum pump 30 is activated and the intake valve 27 is opened (step S11). Thereby, a negative pressure is formed in the pump casing 20 and the suction pipe 15, and the water level of the suction pipe 15 gradually rises. Thereafter, when the full water detector 26 detects that the pump casing 20 is filled with liquid (step S12), the intake valve 22 is closed and the vacuum pump 30 is stopped (step S13), and at the same time the pump (drive) The source 17) is activated (step S14). Thereafter, when the pump 13 increases in speed and reaches a predetermined rated speed, the discharge valve 18 is opened, the liquid is drained into the discharge water tank 12, and the pump 13 is in a steady operation.

  After the pump 13 is in steady operation, the water level Lp in the pump is calculated in the water level calculation unit 43 (step S15), and the water level of the pump 13 is calculated from the calculated water level Lp in the pump (step S15). S16). Information on the calculated degree of water fall is displayed on the display panel 41. Thereby, the operator of the pump device 10 can easily grasp the degree of water fall of the pump 13 and can take measures for preventing water fall (for example, vacuuming using the vacuum pump 30) at an early stage. it can.

  Further, in the control unit 40, water fall detection is performed by the water fall detector 31 (step S17), and when water fall is detected, the drive source 17 is stopped and the operation of the pump is stopped (step S18). On the other hand, if no falling water is detected, the control unit 40 determines whether or not the calculated degree of falling water exceeds a preset threshold value (step S19). As a result of the determination, if the degree of waterfall does not exceed the threshold value, the process returns to step S15 and the waterfall degree is calculated again.

  On the other hand, when the degree of waterfall exceeds the threshold value (however, when water has not fallen), the vacuum pump 30 is started, the intake valve 27 is opened, and the pump casing 20 is evacuated, so that the water filling process is performed. This is automatically performed (step S20).

  When the full water treatment is completed, the counter 45 increments the count value by 1 and counts the number of times the full water treatment has been performed (step S21). Then, the control unit 40 determines whether or not the counted number of full water treatments has reached the set value (step S22), and when it reaches, a warning display indicating that the pump sealing has deteriorated is displayed on the display panel 41. Output (step S23). Thereby, it is possible to notify the operator of the pump device 10 that the sealing has deteriorated, and to promptly replace the sealing.

  FIG. 4 is an explanatory diagram showing a state in which the degree of water fall is displayed on the display panel 41. On the display panel 41, information on the degree of water fall calculated by the water fall degree calculation unit 43 and information on the number of times of full water return counted by the counter 45 are displayed. The operator of the pump device 10 can After confirming the information, it is possible to take measures such as stopping the pump or starting the vacuum pump 30 to perform the full water treatment.

  In the above-described embodiment, an example in which a message is displayed when the number of full water treatments reaches a predetermined value has been described. However, for example, a message may be displayed even when the time required for full water treatment exceeds a threshold value. good. 5 and 6 are flowcharts showing an example of displaying a message by counting the number of full water treatments or the full water treatment time, and the same steps as those in the example of FIG. Is omitted.

  In this example, when the vacuum pump is started, the time until the vacuum pump reaches full water is counted (step S31), and when the count value (full water time) exceeds a threshold value (Y in step S32), A warning message is displayed (step S33). The message displayed here includes deterioration of the sealing member (main pump shaft seal, main pump and main pipe leaks), or vacuuming system abnormality (vacuum pipe system leak, vacuum pump function decline). Possible messages are:

  Also, when the automatic full water treatment (step 20) is performed, the time until the vacuum pump reaches full water is counted (step S34), and when the count value (full water time) exceeds the threshold (step A warning message is displayed (Y in S35) (step S33).

  The embodiment described above is described for the purpose of enabling the person having ordinary knowledge in the technical field to which the present invention belongs to implement the present invention. Various modifications of the above embodiment can be naturally made by those skilled in the art, and the technical idea of the present invention can be applied to other embodiments. The present invention is not limited to the described embodiments, but is to be construed in the widest scope according to the technical idea defined by the claims.

DESCRIPTION OF SYMBOLS 10 Pump apparatus 11 Suction water tank 12 Discharge water tank 13 Pump 15 Suction pipe 17 Drive source 20 Pump casing 21 Impeller 30 Vacuum pump 31 Water fall detector 40 Control part 41 Display panel 43 Water fall degree calculation part 45 Counter

Claims (4)

A pump having an impeller and a pump casing;
A vacuum pump for sucking liquid into the pump casing by evacuating the pump casing;
A drive source for driving the impeller while the pump casing is filled with liquid;
While calculating the water level in the pump casing, the water fall degree calculating unit for calculating the water fall degree of the pump based on the calculated water level information,
And a display unit that outputs and displays information on the calculated degree of water fall.   2. The pump device according to claim 1, wherein when the degree of water fall exceeds a threshold value, the return process is performed by starting the vacuum pump and evacuating the pump casing.   The pump device according to claim 2, further comprising a counter that counts the number of times the return processing has been performed, and displaying a warning on the display panel when a count value by the counter reaches a set value. . An operation support method in a pump device including a pump having an impeller and a pump casing,
Sucking liquid into the pump casing by evacuating the pump casing; and
Driving the impeller with the pump casing filled with liquid;
A water level calculation step of calculating a water level in the pump casing and calculating a water level of the pump based on information on the calculated water level;
A step of outputting and displaying the calculated water fall information.

Images