JPH04329411A - Pressure monitoring system and pressure control system - Google Patents

Abstract

PURPOSE:To abolish pressure monitoring persons and pressure control persons in the case of a gas intermediate pressure construction. CONSTITUTION:This pressure monitoring system for the gas intermediate pressure construction is provided with pressure monitoring devices 1 and 1' composed of a computer 4 to digitally process pressure data from a pressure sensor 3 for detecting gas pressure and a wireless MODEM 5 to turn the processed data into packets, to modulate the packets and to send them by radio waves, and a pressure receiver 2 composed of a computer 7 to process digital data. On the other hand, the pressure control system for the gas intermediate pressure construction is provided with pressure monitoring devices 1 and 1' composed of the computer 4 to digitally process the data from the pressure sensor 3 and the wireless MODEM 5 to demodulate the sent data turned into the packets to the digital data, the computer 7 to process the digital data and an actuator 9 for driving a governor 10.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure monitoring system and a pressure control system during gas medium pressure construction.

0002

BACKGROUND OF THE INVENTION In recent years, the number of underground structures buried under roads has been increasing, and construction work for repairs, periodic replacement, or increased demand is frequently carried out. In these construction works,
When changing the buried location or burying something new, it may be necessary to move other buried objects in the vicinity in addition to the original object. . Particularly in city gas piping systems, medium-pressure pipes branched from high-pressure main pipes and connected to low-pressure pipes are often buried under roads. Therefore, medium-pressure pipes for city gas are often constructed in conjunction with other works other than gas piping work, such as electrical work and water work.

[0003] This medium-pressure pipe work can lead to accidents if the gas supply to consumers is interrupted, and at the same time there is a risk of explosions at the construction site, so care must be taken to adjust the pressure and open and close the valves during construction. pressure monitors are required.

[0004] The above-mentioned construction will be explained using FIG. 3. The construction shown here is an example of replacing a part of the piping in a piping system equipped with two governors and four valves. In the figure, 11 and 12 are medium pressure main pipes, 13
16 and 17 are medium-pressure semi-main pipes branched from main pipes 11 and 12 via valves 14 and 15; This is a low-pressure end tube that is evacuated to a low pressure for the purpose. Normally, the valves 14 and 15 are open, and the gas supplied to the sub-main pipe 13 is supplied from the main pipes 11 and 12.

In this state, the pipe between the construction positions 22 and 23 of the semi-main pipe 13 is replaced. As the first stage of construction, as shown in (a), the valve 14 is first closed. In this work, pressure monitor A checks the pressure on the low pressure side of the governor 20, pressure watcher B checks the pressure on the low pressure side of the governor 21, and a supervisor C at the construction site uses a communication means such as a transceiver. The worker D closes the valve 14 according to instructions from the supervisor C.

As a second step, as shown in (b), the governor 24 of the bypass vehicle is connected to the branch provided in advance on the main pipe side and the semi-main pipe side of the valve 15, and this governor A reduced pressure gas is supplied to the main pipe 13 and the terminal pipes 16 and 17. As mentioned above, medium-pressure pipe work requires careful attention to pressure adjustment or opening and closing of valves during construction, and the pressure of medium-pressure gas in the main pipe 12, which cannot be worked on, is reduced to low-pressure gas that can be worked on by using the governor 24 of the bypass vehicle. It is necessary to reduce the pressure to gas and supply it to the construction area. The work is reported by pressure monitors A and B to governors 20 and 21.
Supervisor C instructs workers E and F based on the pressure on the low pressure side of , and worker F closes valve 15 while worker E adjusts the pressure using governor 24 of the bypass vehicle. Thereafter, depressurized gas is supplied to the semi-main pipe and the terminal pipe by the governor 24 of the bypass vehicle until the construction is completed.

In the third stage, construction is carried out. During the construction, as shown in (c), the pressure in the end pipes 16 and 17 should not become too low or too high.
Pressure monitors A and B constantly monitor the pressure on the end pipe side of the governors 20 and 21 and contact supervisor C, and according to supervisor C's instructions, worker E controls the governor 24 of the bypass vehicle to control the pressure. I do.

When the construction is completed, the fourth step is to open the valves 14 and 15 and to remove the governor 24 of the bypass vehicle from the valve 15. This task (
After opening the valves 14 and 15 to allow gas to be supplied from the main pipes 11 and 12, as shown in d),
Disconnect the connection of the bypass vehicle governor 24 to the valve 15 branch.

As explained above, in the construction of medium-pressure semi-main pipes, in addition to the personnel who actually work at the construction site, pressure monitors are also required at each governor during construction. As a result, it is becoming increasingly difficult to carry out construction work due to labor shortages and rising labor costs. In addition, pressure monitoring and data transmission by pressure monitors are performed by humans, which can sometimes be inaccurate.

[0010] Conventionally, analog telemeters have been used for monitoring such remote locations. There are wired and wireless telemeters, but wired telemeters have restrictions on where they can be installed, and wireless telemeters are easily affected by noise, so they are used for applications that require accuracy. Can not do it. On the other hand, with the recent development of digital electronic technology, digital data communication, which converts data into digital signals and transmits and receives them, has become widespread, and is now being used to communicate not only computer data but also audio signals, image signals, and observation data. is also used. Similar to analog telemeters, there are wired and wireless types for this digital data communication, and wired types have restrictions on installation location just like analog types, while wireless types have restrictions on the installation location. Data communication may not be possible when conditions are poor.

One of the digital data communication methods is a communication method called a packet switching method, which divides digital data into packets (parcels) of appropriate length and transmits data using each packet as a unit. Because it is possible to transmit information, it is becoming increasingly used in various fields.

0012

[Problem to be Solved by the Invention] In each of the present inventions, even if pressure monitors are abolished in the construction of medium-pressure semi-main pipes, the pressure on the end pipe side can be controlled by accurately monitoring the pressure on the end pipe side. It is an object of the present invention to provide a pressure monitoring system that can always adjust the pressure to an appropriate pressure, and a pressure control system that can always control the pressure on the end pipe side to an appropriate pressure even if pressure monitors and pressure adjustment workers are abolished. Take it as a challenge.

[0013]

[Means for Solving the Problems] In order to solve the above problems, the present application is composed of a pressure monitoring device and a pressure data receiving device, and the pressure monitoring device includes a pressure sensor that detects gas pressure, and a pressure data receiving device. It consists of a computer that digitally processes pressure data and a wireless modem that packetizes and modulates the processed data and sends it out as radio waves.The pressure data receiving device is a wireless modem that demodulates the packetized and sent data into digital data. A pressure monitoring system comprising a pressure monitoring device and a pressure control device, the pressure monitoring device comprising a pressure sensor that detects gas pressure, and a computer that processes digital data. It consists of a computer that digitally processes data and a wireless modem that packetizes and modulates the processed data and sends it out as radio waves.The pressure control device consists of a wireless modem that demodulates the packetized data into digital data and a digital This invention provides an invention comprising a pressure control system characterized by comprising a computer that processes data and an electronic control governor that controls pressure according to instructions from the computer.

[0014]

[Operation] In the first invention of the present application having the above configuration, the pressure sensor constantly monitors the pressure on the end pipe side using the pressure monitoring device, converts it into digital data, and wirelessly controls the governor of the bypass vehicle using the packet exchange method. is transmitted to the operator who operates the governor, who then adjusts the gas pressure. In addition, in the second invention, a pressure sensor constantly monitors the pressure on the end pipe side using a pressure monitoring device, converts it into digital data, and wirelessly transmits the data to the bypass vehicle using a packet exchange method. Based on this, the bypass vehicle's computer controls the actuator that drives the governor, and the gas pressure is automatically controlled.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1(a) shows an outline of a pressure monitoring system according to the first invention of the present application, and this pressure monitoring system includes pressure monitoring devices 1 and 1' and a pressure data receiving device 2.
It consists of The pressure monitoring device 1 includes a pressure sensor 3 that detects gas pressure, a computer 4 that digitally processes pressure data from the pressure sensor 3, and a wireless modem 5 that packetizes and modulates the processed data and sends it out by radio waves. On the other hand, the pressure data receiving device 2 includes a wireless modem 6 that demodulates data sent in packet form into digital data, and a computer 7 that processes the digital data.

FIG. 2B shows an outline of a pressure control system according to the second invention of the present application, and this pressure control system is composed of pressure monitoring devices 1, 1', . . . and a pressure control device 8. There is. The pressure monitoring device 1 has the same configuration as the first invention shown in FIG. 1, and the pressure control device 8 includes a wireless modem 6 that demodulates packetized data sent to digital data , a computer 7 that processes digital data, and an actuator 9 that drives a governor 10 under the control of the computer 7.

Referring to FIG. 2, construction work performed by the pressure monitoring and control system according to the present invention will be explained. In FIG. 2, each prerequisite condition for construction is the same as the conventional one shown in FIG. In starting the construction, as a first step, as shown in (a), the pressure monitoring device 1 according to the present invention is installed on the low pressure pipe side of the governor 20, and the pressure monitoring device 1 according to the present invention is installed on the low pressure pipe side of the governor 21. ' are installed so that these pressure monitoring devices 1 and 2 transmit pressure information of the low pressure pipes to supervisor C and worker E. After performing such preparatory work, worker D performs the work of closing the valve 14 as the first stage of construction.

As a second step, as shown in (b), the governor 24 of the bypass vehicle is connected to the branch provided in advance on the main pipe side and the semi-main pipe side of the valve 15, and this governor 24 A reduced pressure gas is supplied to the semi-main pipe 13 and the terminal pipes 16 and 17. In this operation, worker E adjusts the pressure using the governor 24 of the bypass vehicle based on pressure data on the low pressure side of the governors 20 and 21 transmitted from the pressure monitoring devices 1 and 2, and worker F closes the valve 15.

In the third stage, construction is carried out. During the construction, as shown in (c), the pressure on the end pipe side of the governors 20 and 21, which are constantly monitored by the pressure monitoring devices 1 and 2, is monitored by the worker. E confirms and pressure control is performed by adjusting the governor 24 of the bypass vehicle.

When the construction is completed, the fourth step is to release the valves 14 and 15 and to remove the valve 24 of the bypass vehicle. This work is done by opening the valves 14 and 15 and opening the main pipes 11 and 12, as shown in (d).
After gas is supplied from the bypass vehicle, the connection of the bypass vehicle governor 24 to the valve 15 branch is removed. Finally, pressure monitoring devices 1 and 2 are removed.

[0021] As is clear from the above explanation, in the construction of the above-mentioned medium pressure semi-main pipe to which the first invention of the present application is applied, the pressure monitoring data is digitized and transmitted by the packet switching method. Since accurate pressure data can be transmitted without relying on personnel, there is no need for pressure monitoring personnel, making it possible to deal with manpower shortages and rising labor costs.

In the pressure monitoring system according to the first invention described above, only the pressure monitoring device 1 shown in FIG. 1 having the function of monitoring pressure and transmitting the data is used. In the pressure control device according to the invention, a governor 10 of a bypass vehicle is driven by an actuator 9 controlled by a computer 7 based on pressure data transmitted from a pressure monitoring device 1. Therefore, it is also possible to eliminate the need for a worker to operate the governor.

[0023]

[Effects of the Invention] As explained above, according to the first invention of the present application, it is possible to eliminate pressure monitoring personnel, and according to the second invention of the present application, it is possible to further reduce the number of workers who operate the governor of the bypass vehicle. This makes it possible to adequately deal with labor shortages and rising labor costs.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of an embodiment of the first invention and the second invention of the present application.

FIG. 2 is an explanatory diagram of construction work to which the first invention of the present application is applied.

FIG. 3 is an explanatory diagram of conventional construction.

[Explanation of symbols]

1 Pressure monitoring device 2 Pressure data receiving device 3 Pressure sensor 4,7 Computer 5, 6 Wireless modem 8 Pressure control device 9 Actuator 10 Governor

Claims (2)

[Claims] 1. Consisting of a pressure monitoring device and a pressure data receiving device, the pressure monitoring device includes a pressure sensor that detects gas pressure, a computer that digitally processes the pressure data from the pressure sensor, and a computer that packetizes and modulates the processed data. The pressure data receiving device is characterized by comprising a wireless modem that demodulates data sent in packet form into digital data and a computer that processes the digital data. pressure monitoring system. 2. Consisting of a pressure monitoring device and a pressure control device, the pressure monitoring device includes a pressure sensor that detects gas pressure, a computer that digitally processes pressure data from the pressure sensor, and a computer that packetizes and modulates the processed data. It consists of a wireless modem that sends out radio waves.
The pressure control device is characterized by comprising a wireless modem that demodulates packetized data into digital data, a computer that processes the digital data, and an electronic control governor that controls the pressure based on instructions from the computer. Pressure control system.