JP2014024059A - Pipe passage system, and contaminant removal method of pipe passage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe passage system and a contaminant removal method of a pipe passage, capable of not only removing a contaminant clogged in an object part of the pipe passage but also flexibly coping with the various pipe passages.SOLUTION: A pipe passage system comprises: a pipe passage 15 for making fluid flow toward a downstream side from an upstream side, and removes a contaminant clogged in an object part 151 of the pipe passage 15, and is provided with a control valve 152 capable of cutting off a flow of the fluid of the object part 151 and control means 2 for executing an opening-closing operation of the control valve 152, and is also provided with flow rate measuring means 153 for measuring a flow rate of the fluid of the object part 151, and the control means 2 executes the opening-closing operation of the control valve 152 when the flow rate of the fluid of the object part 151 becomes a set value or less.

Description

  The present invention relates to a pipeline system for removing contaminants clogged in a target portion of a pipeline, and a contaminant removal method for pipelines.

  Conventionally, as a piping system, there is known a piping system that includes a piping that circulates fluid from an upstream side toward a downstream side, and a pressurized water supply device that sends pressurized water toward the upstream side of the piping (for example, Patent Document 1). According to such a pipe line system, the pressurized water supply device supplies the pressurized water toward the upstream side of the pipe line, so that foreign substances clogged in the target part such as a small-diameter pipe can be removed.

JP 2000-70891 A

  By the way, according to the piping system concerning patent documents 1, since equipment called a pressurized water supply device is needed, the space which installs such a pressurized water supply device is required. In addition, for example, in order to introduce such a pressurized water supply apparatus into an existing piping system, it is necessary to take measures (expenses, period) such as a large-scale modification.

  Therefore, in view of such circumstances, the present invention can not only remove foreign substances clogged in the target portion of the pipeline, but also can flexibly cope with various pipelines and piping. It is an object of the present invention to provide a method for removing impurities from a road.

  A pipe line system according to the present invention includes a pipe line that circulates fluid from an upstream side to a downstream side, a control valve that can shut off a flow of fluid in a target part of the pipe line, and a contaminant that is clogged in the target part. And a control means for changing the flow rate of the fluid in the target part by executing an opening / closing operation of the control valve to remove, and further comprising a flow rate measuring means for measuring the flow rate of the fluid in the target part. When the flow rate of the fluid becomes equal to or less than the set value, the control valve is opened and closed.

  According to the piping system according to the present invention, the control valve can block the flow of the fluid in the target portion with respect to the piping that circulates the fluid from the upstream side toward the downstream side. And a control means performs the opening / closing operation | movement of a control valve. Thereby, since the object part of a piping line changes from a non-pressure state to a pressurization state, the foreign substance jammed in the object part of a piping line can be removed.

  Moreover, according to the piping system, the flow rate measuring means measures the flow rate of the fluid in the target part. Then, when the flow rate of the fluid in the target portion is equal to or less than the set value, the control means causes the control valve to open and close. Therefore, for example, when the target part of the pipeline is clogged with impurities, the control valve can be opened and closed effectively.

  Further, in the piping system according to the present invention, the control means causes the control valve to open / close until the fluid flow rate of the target part is equal to or higher than the set value or the control valve open / close operation reaches the set number of times. Also good.

  According to the piping system having such a configuration, the control means performs the opening / closing operation of the control valve until the flow rate of the fluid in the target part becomes equal to or higher than the set value or the opening / closing operation of the control valve reaches the set number of times. To do. As a result, when the fluid flow rate in the target section exceeds the set value, the control valve opening / closing operation is terminated, and even if the fluid flow rate in the target section does not exceed the set value, the control valve opening / closing operation is set. When the number of times is reached, the control valve opening / closing operation ends. Therefore, it is possible to suppress the control valve from performing the opening / closing operation unnecessarily.

  In addition, the contaminant removal method for a pipeline according to the present invention includes a pipeline that allows fluid to flow from the upstream side toward the downstream side, a control valve that can block the flow of fluid in the target portion of the pipeline, and the target portion. Control means for changing the flow rate of the fluid in the target part by performing an opening and closing operation of the control valve to remove the contaminants clogged with, further comprising a flow rate measuring means for measuring the flow rate of the fluid in the target part, When the flow rate of the fluid in the target portion is equal to or lower than the set value, the control means executes the opening and closing operation of the control valve to change the flow rate of the fluid in the target portion, thereby removing impurities clogged in the target portion. It is characterized by that.

  As described above, according to the present invention, it is possible not only to remove foreign substances clogged in the target portion of the pipe line, but also to provide an excellent effect that it can flexibly cope with various pipe lines.

The principal part systematic diagram of the piping system which concerns on one Embodiment of this invention is shown. The control block diagram of the piping system concerning the embodiment is shown. The control valve opening / closing process flow of the piping system concerning the embodiment is shown. It is a figure explaining the contaminant removal method of the piping system which concerns on the embodiment, Comprising: The relationship figure of flow volume and the opening / closing operation | movement of a control valve is shown. It is a figure explaining the contaminant removal method of the piping system which concerns on the embodiment, Comprising: The relationship figure of flow volume and the opening / closing operation | movement of a control valve is shown.

  Hereinafter, an embodiment of a pipeline system according to the present invention will be described with reference to FIGS.

  As shown in FIGS. 1 and 2, the piping system according to the present embodiment includes a piping 1 that circulates fluid from the upstream side to the downstream side, and a control unit 2 that controls each part of the piping 1. Prepare. In the present embodiment, the pipeline system is a pipeline of a water supply system of a hydroelectric power plant.

  The pipe line 1 includes a main pipe line 10 and a plurality of branch pipe lines 12 to 15 branched from the main pipe line 10 via a strainer 11. The plurality of branch pipes 12 to 15 include a generator cooling water pipe 12 for cooling the generator air cooler, the generator thrust, and the lower metal, and an oil collecting tank cooling pipe for cooling the oil collecting tank. A passage 13, a turbine bearing cooling piping 14 for cooling the turbine bearing, and a turbine seat water supply piping 15 for supplying water to the seat of the turbine are provided.

  The water wheel filling water supply pipe line 15 includes a flow rate adjusting unit 151 that adjusts the flow rate of water in the pipe, and a control valve 152 that can block the flow of water in the pipe. Further, the water wheel seat water supply pipe line 15 includes a flow rate measuring unit 153 that measures the flow rate of water in the pipe. In the present embodiment, the main pipe line 10 has a pipe size of 150A, whereas the water wheel seat water supply pipe line 15 has a pipe size of 15A.

  In the present embodiment, the flow rate adjusting means 151 is an orifice valve that adjusts the flow rate by partially reducing the inner diameter of the tube and losing pressure. Therefore, such a flow rate adjusting means 151 is a place where impurities such as dust and sludge are likely to be clogged, and is the “target part of the pipeline” according to the present invention.

  The control valve 152 is disposed on the downstream side of the flow rate adjusting means 151. The control valve 152 is an electric valve in this embodiment, and can be opened and closed instantaneously (for example, in 1 to 2 seconds).

  The flow rate measurement unit 153 includes a flow rate detection unit 153a that detects the flow rate of water in the pipe, and outputs a signal to the control unit 2 when the flow rate detected by the flow rate detection unit 153a is equal to or less than a set value. It is configured as follows. The flow rate measuring means 153 further includes a flow rate setting unit 153b for freely setting a set value for outputting the signal. The flow rate measuring means 153 is an electromagnetic flow meter in this embodiment.

  The control unit 2 causes the control valve 152 to open and close when the flow rate of water in the flow rate adjustment unit 151, that is, the flow rate measured by the flow rate measurement unit 153 becomes equal to or less than the set value. Specifically, the control means 2 performs an opening / closing operation of the control valve 152 so that the flow rate adjusting means 151 changes from a non-pressure state to a pressurized state in order to remove impurities clogged in the flow rate adjusting means 151. .

  Then, the control means 2 determines that the flow rate measured by the flow rate measurement means 153 (the flow rate of water in the flow rate adjustment means 151) is equal to or greater than a set value, or the control valve 152 is opened and closed a set number of times (in this embodiment, 2 times). Until the time is reached, the control valve 152 is opened and closed. The piping system is provided with opening / closing setting means 3 for freely setting the time for opening and closing the control valve 152.

  The configuration of the piping system according to the present embodiment is as described above. Next, the opening / closing operation of the control valve according to the present embodiment will be described with reference to FIGS.

  In step 100, the control valve 152 is opened, and water flows into the water wheel filling water supply pipe line 15. And when it progresses to step 101, it will be determined whether the flow volume of the water measured with the flow measurement means 153 is below a setting value, and when it is below a setting value, it will progress to step 102, but it is not below a setting value Return to step 101 again.

  In step 102, the control valve 152 is closed for a predetermined time (for example, 15 seconds), and then the control valve 152 is opened for a predetermined time (for example, 15 seconds), and the process proceeds to step 103. At this time, since the control valve 152 is opened and closed so that the flow rate adjusting unit 151 changes from the non-pressure state to the pressurized state, the foreign matter clogged in the flow rate adjusting unit 151 can be removed.

  In step 103, it is determined whether or not the flow rate of water measured by the flow rate measuring means 153 is equal to or lower than the set value. If the flow rate is equal to or lower than the set value, the process proceeds to step 104, while setting as shown in FIG. If not, the process returns to step 101. That is, as shown in FIG. 4, when the flow rate of water measured by the flow rate measuring means 153 exceeds a set value by the control valve 152 performing one opening / closing operation, the opening / closing operation of the control valve 152 is 1 Finished in times.

  In step 104, the second opening / closing operation of the control valve 152 is executed. Specifically, the control valve 152 is closed for a predetermined time (for example, 15 seconds), and then the control valve 152 is opened, Proceed to step 105. Then, in step 105, it is determined whether or not the flow rate of water measured by the flow rate measuring means 153 is equal to or less than the set value. If not, the process returns to step 101. If it is below the set value, the process proceeds to step 106.

  In step 106, the opening / closing operation of the control valve 152 is forcibly terminated, and the opening of the control valve 152 is maintained. That is, as shown in FIG. 5, even if the opening / closing operation of the control valve 152 is executed twice, if the flow rate of water measured by the flow rate measuring means 153 is not more than the set value, only the opening / closing operation of the control valve 152 is performed. Then, it is determined that the impurities clogged in the flow rate adjusting means 151 cannot be removed, and the opening / closing operation of the control valve 152 is prevented from being performed unnecessarily.

  As described above, according to the pipeline system according to the present embodiment, the control valve 152 can block the flow of water from the turbine seat water supply pipeline 15 that circulates water from the upstream side toward the downstream side. Then, the control unit 2 causes the control valve 152 to open / close. As a result, the turbine wheel seat water supply pipe line 15 (flow rate adjusting means 151) is changed from the non-pressure state to the pressurized state, so that the contaminants clogged in the water wheel seat water supply pipe line 15 (flow rate adjusting means 151) are removed. Can do. Therefore, it can respond flexibly to various piping paths.

  Further, according to the pipeline system according to the present embodiment, when the control valve 152 is switched from the open state to the closed state, a partial backflow or vibration is instantaneously generated in the flow rate adjusting means 151. The effect that the foreign matter adhering to the inside of the adjusting means 151 is peeled off from the inside of the flow rate adjusting means 151 or can be easily peeled off can be expected.

  Moreover, according to the pipeline system according to the present embodiment, the flow rate measuring unit 153 measures the flow rate of water flowing through the water wheel seat water supply pipeline 15 (flow rate adjusting unit 151). And when the flow volume of the water which flows into the water wheel seat water supply piping 15 (flow volume adjustment means 151) becomes below a preset value, the control means 2 performs the opening / closing operation | movement of the control valve 152. FIG. Therefore, the opening / closing operation of the control valve 152 can be effectively executed when the flow rate adjusting means 151 is clogged with impurities.

  Further, according to the piping system according to the present embodiment, the control unit 2 is configured to open or close the control valve 152 when the flow rate flowing through the water wheel-filled water supply piping 15 (flow rate adjusting unit 151) is equal to or higher than a set value. The opening / closing operation of the control valve 152 is executed until the operation reaches the set number of times (2 times). As a result, when the flow rate of the fluid flowing through the water wheel filling water supply pipe line 15 (flow rate adjusting means 151) becomes equal to or higher than the set value, the opening / closing operation of the control valve 152 is ended.

  On the other hand, even if the flow rate of the fluid flowing through the water wheel filling water supply pipe line 15 (flow rate adjusting means 151) does not exceed the set value, the open / close operation of the control valve 152 is performed when the open / close operation of the control valve 152 reaches the set number of times. finish. Therefore, it is possible to suppress the control valve 152 from performing the opening / closing operation unnecessarily. In addition, when the flow volume of the fluid which flows into the turbine wheel seat water supply piping 15 (flow rate adjustment means 151) does not become a set value or more, for example, the piping is disassembled to remove impurities.

  It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made without departing from the gist of the present invention. Moreover, it is needless to say that configurations, methods, and the like according to various modifications described below may be arbitrarily selected and employed in the configurations, methods, and the like according to the above-described embodiments.

  In the piping system according to the above-described embodiment, the configuration in which the piping is the piping of the water supply system of the hydroelectric power plant has been described. However, the configuration is not limited thereto. Specifically, the piping path is not particularly limited, and in short, includes a piping path that allows fluid to flow from the upstream side toward the downstream side, and removes clogged substances in the target portion of the piping path. Any configuration may be used.

  Further, in the piping system according to the above embodiment, even when the control unit 2 executes the opening / closing operation (closing operation) of the control valve 152 twice, the flow rate of the fluid flowing through the water wheel seat water supply piping 15 is the set value. In the case where the above is not the case, the configuration for ending the opening / closing operation of the control valve 152 has been described. However, the configuration is not limited thereto.

  Specifically, the control means 2 may be configured to perform the opening and closing operation of the control valve 152 three times or more, and until the flow rate of the fluid flowing through the water wheel filling water supply pipe line 15 becomes a set value or more, A configuration in which the opening / closing operation of 152 is continuously executed may be employed. For example, the configuration may be such that the set number of times can be set by the open / close setting means 3.

  Moreover, in the piping system according to the above embodiment, the configuration that completely closes the piping 15 when the control valve 152 is closed, that is, the configuration that is a shut valve, has been described. However, the configuration is limited to this configuration. Absent. Specifically, the control valve 152 may be a flow rate adjustment valve and may be configured to allow a part of the fluid to flow when closed.

  In the piping system according to the above embodiment, the configuration in which the opening time and the closing time are the same time (15 seconds) when the control valve 152 is opened and closed has been described. I can't. Specifically, a configuration in which the opening time and the closing time are different from each other may be employed, or such a configuration may be employed in which the time is gradually increased or decreased.

  Moreover, in the piping system according to the above embodiment, the configuration for removing the foreign substances clogged in the flow rate adjusting means 151 that is an orifice valve has been described, but the configuration is not limited thereto. Specifically, it may be configured to remove contaminants clogged in the flow rate adjusting means, which is a flow rate adjusting valve, or may be configured to remove contaminants clogged in the curved pipe part (elbow or vent) of pipes, and different pipe diameters. The structure which removes the foreign material clogged in the connection part which connects this piping may be sufficient.

  Moreover, in the piping system which concerns on the said embodiment, although the control valve 152 demonstrated the structure arrange | positioned in the downstream of the flow volume adjustment means 151, it is not restricted to such a structure. Specifically, the control valve 152 may be arranged on the upstream side of the flow rate adjusting means 151.

  In the piping system according to the above embodiment, the control means 2 opens and closes the control valve 152 when the flow rate of the water flowing through the water wheel filling water supply pipe line 15 (flow rate adjusting means 151) becomes a set value or less. Although the configuration for executing the operation has been described, the configuration is not limited thereto. Specifically, the control means 2 may be configured to perform an opening / closing operation of the control valve 152 every predetermined period (for example, 3 days).

  Further, in the piping system according to the present invention, when the control valve 152 is opened and closed, the flow rate of the fluid flowing through the water wheel filling water supply piping 15 is increased compared with that before the opening and closing operation of the control valve 152. When the means 2 opens and closes the control valve 152 again, and the flow rate of the fluid flowing through the water wheel filling water supply pipe line 15 does not increase more than before the opening and closing operation of the control valve 152, the control means 2 The structure which maintains opening may be sufficient.

  DESCRIPTION OF SYMBOLS 1 ... Pipe line, 2 ... Control means, 3 ... Open / close setting means, 10 ... Main pipe line, 11 ... Strainer, 12, 13, 14, 15 ... Branch pipe line, 151 ... Flow rate adjustment means (target part), 152 ... Control valve, 153 ... flow rate measuring means, 153a ... flow rate detection unit, 153b ... flow rate value setting unit

Claims (3)

Pipe line that allows fluid to flow from the upstream side to the downstream side, a control valve that can shut off the flow of fluid in the target part of the pipe line, and opening and closing operation of the control valve to remove contaminants clogged in the target part And a control means for changing the flow rate of the fluid of the target part by executing
It further comprises a flow rate measuring means for measuring the flow rate of the fluid of the target part,
The control means causes the control valve to open and close when the flow rate of the fluid in the target portion is equal to or less than a set value.   2. The piping system according to claim 1, wherein the control unit causes the control valve to perform the opening / closing operation until the flow rate of the fluid in the target portion is equal to or higher than a set value or the opening / closing operation of the control valve reaches the set number of times. Pipe line that allows fluid to flow from the upstream side to the downstream side, a control valve that can shut off the flow of fluid in the target part of the pipe line, and opening and closing operation of the control valve to remove contaminants clogged in the target part And a control means for changing the flow rate of the fluid of the target part by executing
It further comprises a flow rate measuring means for measuring the flow rate of the fluid of the target part,
When the flow rate of the fluid in the target portion is equal to or lower than the set value, the control means executes the opening and closing operation of the control valve to change the flow rate of the fluid in the target portion, thereby removing impurities clogged in the target portion. A method for removing contaminants in a pipeline.

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