JP2501466Y2 - Pipe clogging prevention device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for preventing clogging of a conduit connected to a plant or a pipe for measuring the pressure in a plant such as a furnace or the pressure or flow rate of a fluid in a pipe.

[0002]

2. Description of the Related Art There are various fields in which it is necessary to measure the pressure inside a plant or pipe, such as a blast furnace in a steel mill. Taking a blast furnace as an example, conventionally, in the blast furnace, in order to monitor the reaction status and various characteristics in the furnace and to control the inside of the furnace to an appropriate state, the pressure inside the furnace and the pressure of exhaust gas discharged from the top of the blast furnace are controlled. The flow rate was measured.

The method of measuring the pressure and the flow rate is, for example, a method of opening a measurement location and directly attaching a conduit to the pressure to conduct the pressure to a measuring instrument. As shown in FIG.
There are various methods such as a method in which the tube is attached to the open measurement location on the outer circumference of the tube 2, and a conduit 3 is further attached to the side surface of the cylindrical body to conduct pressure to the measuring instrument, but like the gas discharged from the top of the blast furnace, If an attempt is made to measure the pressure of a fluid containing a large amount of dust, dust or the like may adhere to the inlet of the conduit, often causing the inlet of the conduit to be blocked, and the pressure may not be measured.

In order to solve the above problems, a purge gas pipe 4 is connected to the conduit 3 to forcibly purge dust and the like adhering to the inlet of the conduit.

[0005]

In the above-mentioned conventional method of forcibly blowing off the adhering substances at the inlet of the conduit with the purge gas, only a large amount of dust or the like adhering to the inlet of the conduit is removed intensively, and a large amount of dust or the like is introduced. Since it remains on the periphery, new dust and the like are successively deposited on the remaining deposits, which causes the inlet to be rapidly blocked.

In addition, during pressure measurement, the detected value fluctuates greatly depending on the gas pressure during purging, so normal measurement cannot be performed. The present invention has been made for the purpose of solving the above problems, and is intended to prevent clogging caused by dust or the like adhering to the inlet of a conduit.

[0007]

According to the present invention, therefore, a vibrator is attached to vibrate the conduit to prevent dust and the like from adhering to the vicinity of the inlet of the conduit, and to try to shake off the dust or the like even if it adheres. It is a thing. That is, the present invention relates to a conduit connected to a plant or a pipe for measuring the pressure in the plant or the pressure or flow rate of the fluid in the pipe, and conducting the pressure in the plant or the pressure in the pipe to the measuring instrument near the conduit inlet. It is characterized in that a vibration exciter for vibrating is attached.

The vibration of the conduit by the vibration exciter may always be performed, but preferably a controller for controlling the vibration exciter is provided so that the vibration time, the operation interval and the frequency can be arbitrarily set. More preferably in combination with gas purging to prevent clogging of the conduit. In this case, the gas purging is carried out while the vibration by the vibration exciter is being performed, and the pressure in the plant or the pipe is measured during the interruption of the gas purging. In order to perform gas purging during excitation by the exciter, for example, a purge gas pipe connected to the conduit may be provided with a solenoid valve controlled by a controller. It is desirable to connect the pipe in the same direction as that of and at an acute angle to the pipe. Similarly, when fluid flows in the plant in the circumferential direction by stirring, for example, the conduit is connected to the plant so as to form an acute angle with the circumferential flow. Due to the vibration, the deposits such as dust separated from the vicinity of the inlet of the conduit are blown off by the purge gas and are removed from the inlet of the conduit along with the flow of the fluid in the pipe or the plant.

[0009]

Embodiment In the embodiment shown in FIG. 2, a main pipe 1 through which a fluid flows.
A conduit 12 provided so that the pressure of the fluid in 1 is orthogonal to the main pipe 11.
In the device in which the measuring device 13 is used for measurement, the vibrator 1 is attached near the conduit inlet 16 and the conduit 1 is installed.
The vibration time, the operation interval, and the vibration frequency can be controlled by the controller 15 that vibrates 2 and controls the vibration exciter 14. In the figure, 17 is a solenoid valve.

In the embodiment shown in FIG. 3, the conduit 21 connected to a measuring instrument (not shown) is connected to the main pipe 11 at the same direction as the fluid in the main pipe 11 and forms an acute angle with the main pipe 11 to form the conduit 21.
Further, a purge gas pipe 22 is connected to the so that the purge gas is blown in the same direction as the fluid in the main pipe,
A shaker 14 is attached to the inlet of the conduit, and the purge gas pipe 2
It is designed to be controlled by the controller 15 together with the solenoid valve 23 provided in 2.

In this embodiment, the exciter 14 is operated by the controller 15 to vibrate the conduit 21 at a set frequency for a certain period of time, and at the same time, the solenoid valve 23 is opened to open the gas pipe 2
The purge gas blows out into the main pipe through 2 and the conduit 21, blows out dust and the like shaken off by vibration, and flows out together with the fluid flowing in the pipe.

[0012]

The present invention is constructed as described above and has the following effects. According to the apparatus of claim 1, the vibration of the conduit inlet portion prevents dust and the like from adhering to the conduit inlet portion, and even if it adheres, it is shaken off. This prevents clogging of the conduit.

According to the apparatus of claim 2, the excitation time,
The operation interval, frequency, etc. can be controlled.
In the apparatus according to the third aspect, the dust and the like shaken off by the vibration is blown into the plant or the pipe by the purge gas, and the adhesion of the dust and the like can be effectively prevented.

In the apparatus according to the fourth aspect, the dust blown off by the purge gas is carried along with the fluid flow in the plant or the pipe and is removed from the inlet of the conduit.

[Brief description of drawings]

FIG. 1 is a diagram showing a conventional example.

FIG. 2 is a cross-sectional view of a device in which a vibrator is attached to a conduit.

FIG. 3 is a cross-sectional view of a device in which a shaker is attached to a conduit connecting a purge gas pipe.

[Description of sign]

11 ・ ・ Main pipe 12,21 ・
・ Conduit 13 ・ ・ Measuring instrument 14 ・ ・ Vibrator 15 ・ ・ Controller 16 ・ ・ Conduit inlet 17, 23 ・ ・ Solenoid valve 22 ・ ・ Purge gas pipe

Claims (4)

(57) [Scope of utility model registration request] 1. A conduit connected to a plant or a pipe for measuring the pressure in the plant or the pressure or flow rate of the fluid in the pipe, and transmitting the pressure in the plant or the pressure in the pipe to a measuring instrument, near the conduit inlet. An apparatus for preventing clogging of a conduit, comprising a vibrating device for vibrating the conduit. 2. The conduit clogging prevention device according to claim 1, further comprising a controller for controlling the vibration exciter. 3. The device for preventing clogging of a conduit according to claim 2, wherein a gas purge pipe is connected to the conduit, and a solenoid valve provided on the gas purge pipe is controlled by a controller together with a vibration exciter. 4. The device for preventing clogging of a conduit according to claim 3, wherein the conduit is connected to the plant or the pipe so as to form an acute angle with the flow of the fluid in the plant or in the pipe.