阅读说明：本技术 一种管道粉体静电监测装置 (Pipeline powder static monitoring devices ) 是由 宫宏 李亮亮 孟鹤 高鑫 刘全桢 孙立富 李义鹏 浦鹤 张婷婷 初本林 于 2018-06-06 设计创作，主要内容包括：本发明公开了一种管道粉体静电监测装置,主要包括与风送管道同尺寸的不锈钢输料管、密封室、底部带有孔洞尺寸可调的法拉第筒、电场感应板、静电测试仪及信号处理设备。在输料管上设置有密封室,在密封室的内部设置有法拉第筒,在法拉第筒的底部安装有用以调节孔洞大小的挡板；在法拉第筒的外侧设置有电场感应板,在密封室的内部与所述电场感应板工作面正对且间隔一定距离处设置有用于测量电场感应板上静电信号的静电测试仪,所述静电测试仪与用于将其所测得静电信号转换成物料带电量信号的信号处理设备连接。本发明可用于石化聚烯烃、聚酯装置风送管道物料静电在线监测,具有可连续、实时高效、快速准确测量静电量等优点。(The invention discloses a pipeline powder static monitoring device which mainly comprises a stainless steel delivery pipe with the same size as an air delivery pipeline, a sealing chamber, a Faraday cylinder with an adjustable hole size at the bottom, an electric field induction plate, a static tester and signal processing equipment. A sealing chamber is arranged on the material conveying pipe, a Faraday cylinder is arranged in the sealing chamber, and a baffle for adjusting the size of the hole is arranged at the bottom of the Faraday cylinder; the device comprises a Faraday cylinder, an electric field induction plate, a static electricity tester and a signal processing device, wherein the electric field induction plate is arranged on the outer side of the Faraday cylinder, the static electricity tester used for measuring static electricity signals on the electric field induction plate is arranged in a sealed chamber and is just opposite to a working surface of the electric field induction plate and is arranged at a certain distance away from the working surface of the electric field induction plate, and the static electricity tester is connected with the signal processing device used for converting the measured static electricity signals into material charge quantity. The invention can be used for online monitoring of static electricity of materials in pneumatic pipelines of petrochemical polyolefin and polyester devices, and has the advantages of continuous, real-time, efficient, rapid and accurate measurement of static electricity and the like.)

1. The utility model provides a pipeline powder static monitoring devices which characterized in that: the electrostatic detection device comprises a material conveying pipe, wherein a sealing chamber protruding outwards is arranged on the material conveying pipe, the sealing chamber is communicated with the interior of the material conveying pipe, and an electrostatic detection cylinder is arranged in the sealing chamber; the electrostatic detection cylinder comprises a metal outer cylinder and a metal inner cylinder, an insulating material is filled between the metal outer cylinder and the metal inner cylinder, and a baffle plate for adjusting the size of the end hole is arranged at one end of the electrostatic detection cylinder; the static electricity detection device comprises a static electricity detection barrel, an electric field induction plate is arranged on the outer side of the static electricity detection barrel, a static electricity tester used for measuring static electricity signals on the electric field induction plate is arranged in a sealed chamber and is just opposite to a working surface of the electric field induction plate and is arranged at a certain distance away from the working surface of the electric field induction plate, and the static electricity tester is connected with signal processing equipment used for converting the measured static electricity signals into material charge quantity signals.

2. The pipeline powder static monitoring device of claim 1, characterized in that: the conveying pipeline is made of stainless steel materials, a feeding hole is formed in one end of the conveying pipeline, a discharging hole is formed in the other end of the conveying pipeline, and the diameter of the conveying pipeline is the same as that of the air conveying pipeline.

3. The pipeline powder static monitoring device of claim 1, characterized in that: the sealing chamber is arranged on the straight pipe section of the conveying pipe and comprises a first cavity and a second cavity, the second cavity is located between the first cavity and the main pipe body of the conveying pipe, the static detection cylinder body is vertically arranged in the second cavity, and the static tester is arranged in the first cavity.

4. The pipeline powder static monitoring device of claim 3, characterized in that: one side edge of the electrostatic detection cylinder is positioned on a pipe wall tangent line of the conveying pipe, the other side edge of the electrostatic detection cylinder is positioned on a boundary line of the first cavity and the second cavity, and the bottom surface of the second cavity is positioned right below the electrostatic detection cylinder and is obliquely arranged.

5. The pipeline powder static monitoring device of claim 1, characterized in that: the electric field induction plate is fixed through a bolt penetrating through the metal outer cylinder and the metal inner cylinder, and the electric field induction plate is connected with the metal inner cylinder and insulated from the metal outer cylinder.

6. The pipeline powder static monitoring device of claim 1, characterized in that: the electric field induction plate is parallel to the central line of the electrostatic detection cylinder, and the working surface faces the electrostatic tester.

7. the pipeline powder static monitoring device of claim 1, characterized in that: the static electricity tester is fixedly connected with the vertical wall of the sealing chamber through a cross beam.

8. The pipeline powder static monitoring device of claim 1, characterized in that: the baffle comprises a fixed plate and an adjusting plate moving left and right relative to the fixed plate, and the fixed plate is connected with the adjusting plate through a bolt.

9. The pipeline powder static monitoring device of claim 1, characterized in that: the end part of the material conveying pipe is connected with a vertically arranged air material conveying pipeline through a flange.

10. the pipeline powder static monitoring device of any one of claims 1-9, wherein the specific working process is as follows:

The whole electrostatic detection cylinder is of a Faraday cylinder structure and is used as a powder material collector, when materials in the conveying pipe enter the electrostatic detection cylinder through the feeding hole, the size of a hole at the bottom of the electrostatic detection cylinder is controlled through a pre-adjusting baffle, and the materials with certain mass or volume are always kept in the electrostatic detection cylinder when the powder flows through the conveying pipe so as to generate an electrostatic electric field signal;

The electrostatic field in the electrostatic detection cylinder body is transmitted to the electric field induction plate through the conductor, and the photoelectric electrostatic measuring instrument converts a detected electric field signal into a standard industrial signal through the signal processing equipment and then transmits the standard industrial signal to the control system to provide accurate material charging information.

Technical Field

The invention relates to a static monitoring device for pneumatic conveying materials in the petrochemical industry, in particular to a pipeline powder static monitoring device capable of realizing real-time monitoring of pipeline powder static.

Background

Petrochemical equipment, such as polyolefin and polyester production equipment, use an air conveying system to realize the production, transportation and packaging processes of powder materials. The high-insulation polyolefin and polyester particles are in frictional electrification with the pipeline, and the high-electrification materials enter the storage bin through the pipeline to cause the storage bin wall sticking and even the storage bin flash explosion accident. Therefore, the electrostatic charged quantity of the materials entering the storage bin needs to be monitored electrostatically, and the electrostatic increase of the materials entering the storage bin is prevented.

the charge carried by the air-conveying object belongs to space charge, and the most effective method at present is to use a faraday cylinder measurement method, for example, patent CN 1303428C discloses a powder static monitor, and patent CN 203965528U discloses a polyolefin bin static monitor. However, the prior art can only carry out intermittent or single static measurement on the pipeline material by controlling the Faraday cylinder when in need, and cannot realize continuous and real-time measurement.

Disclosure of Invention

Based on the technical problems, the invention provides a device capable of continuously detecting/monitoring the electrostatic quantity of pipeline powder in real time, and the device can better provide material electrostatic safety monitoring and control for production devices such as polyolefin, polyester and the like.

The technical solution adopted by the invention is as follows:

A pipeline powder static monitoring device comprises a material conveying pipe, wherein a sealing chamber protruding outwards is arranged on the material conveying pipe, the sealing chamber is communicated with the inside of the material conveying pipe, and a static detection cylinder is arranged inside the sealing chamber; the electrostatic detection cylinder comprises a metal outer cylinder and a metal inner cylinder, an insulating material is filled between the metal outer cylinder and the metal inner cylinder, and a baffle plate for adjusting the size of the end hole is arranged at one end of the electrostatic detection cylinder; the static electricity detection device comprises a static electricity detection barrel, an electric field induction plate is arranged on the outer side of the static electricity detection barrel, a static electricity tester used for measuring static electricity signals on the electric field induction plate is arranged in a sealed chamber and is just opposite to a working surface of the electric field induction plate and is arranged at a certain distance away from the working surface of the electric field induction plate, and the static electricity tester is connected with signal processing equipment used for converting the measured static electricity signals into material charge quantity signals.

Preferably, the conveying pipe is made of stainless steel materials, one end of the conveying pipe is a feeding hole, the other end of the conveying pipe is a discharging hole, and the pipe diameter of the conveying pipe is the same as that of the air conveying pipeline.

Preferably, the sealing chamber is arranged on the straight pipe section of the conveying pipe, the sealing chamber comprises a first chamber and a second chamber, the second chamber is located between the first chamber and the main pipe body of the conveying pipe, the static detection cylinder body is vertically arranged in the second chamber, and the static tester is arranged in the first chamber.

Preferably, one side edge of the electrostatic detection cylinder is located on a pipe wall tangent line of the conveying pipe, the other side edge of the electrostatic detection cylinder is located on a boundary line of the first chamber and the second chamber, and the bottom surface of the second chamber is located right below the electrostatic detection cylinder and is obliquely arranged.

Preferably, the electric field induction plate is fixed by a bolt penetrating through the metal outer cylinder and the metal inner cylinder, and the electric field induction plate is connected with the metal inner cylinder and insulated from the metal outer cylinder.

preferably, the electric field induction plate is parallel to the central line of the electrostatic detection cylinder, and the working surface faces the electrostatic tester.

Preferably, the static electricity tester is fixedly connected with the vertical wall of the sealed chamber through a cross beam.

Preferably, the baffle plate comprises a fixed plate and an adjusting plate moving left and right relative to the fixed plate, and the fixed plate and the adjusting plate are connected through bolts.

Preferably, the end part of the material conveying pipe is connected with a vertically arranged air material conveying pipeline through a flange.

Preferably, the specific working process is as follows:

The whole electrostatic detection cylinder is of a Faraday cylinder structure and is used as a powder material collector, when materials in the conveying pipe enter the electrostatic detection cylinder through the feeding hole, the size of a hole at the bottom of the electrostatic detection cylinder is controlled through a pre-adjusting baffle, and the materials with certain mass or volume are always kept in the electrostatic detection cylinder when the powder flows through the conveying pipe so as to generate an electrostatic electric field signal;

The electrostatic field in the electrostatic detection cylinder body is transmitted to the electric field induction plate through the conductor, and the photoelectric electrostatic measuring instrument converts a detected electric field signal into a standard industrial signal through the signal processing equipment and then transmits the standard industrial signal to the control system to provide accurate material charging information.

The beneficial technical effects of the invention are as follows:

The invention provides a pipeline powder static monitoring device which can be used for online monitoring of static of materials in pneumatic pipelines of petrochemical polyolefin and polyester devices and has the advantages of continuous, real-time, efficient, rapid and accurate measurement of static quantity and the like.

Drawings

The invention will be further described with reference to the following detailed description and drawings:

FIG. 1 is a schematic view of a schematic structural principle of a pipeline powder static monitoring device according to the present invention;

FIG. 2 is a schematic view of a Faraday cage according to the present invention;

Fig. 3 is a schematic top view of the structure of fig. 1.

In the figure, 1-a delivery pipeline; 2-sealing the chamber; 3-Faraday cylinder, 31-bottom hole of Faraday cylinder; 32-hole baffles; 33-baffle fixing bolts; 4-an electric field induction plate; 5-static electricity tester; 6-a signal processing device; 7-flange.

Detailed Description

with the attached drawings, the pipeline powder static monitoring device mainly comprises a stainless steel conveying pipe 1 with the same size as an air conveying pipeline, a sealing chamber 2, a Faraday cylinder 3 with an adjustable bottom hole size, an electric field induction plate 4, a static tester 5 and a signal processing device 6. A sealing chamber 2 is arranged outside the material conveying pipe 1 and between the material inlet and the material outlet, a Faraday cylinder 3 is arranged in the sealing chamber 2, and the Faraday cylinder 3 is composed of a metal outer cylinder, a metal inner cylinder and a high-insulation material layer filled between the inner metal cylinder and the outer metal cylinder. One side edge of the Faraday cylinder 3 is connected to the pipe wall between the feed inlet and the discharge outlet of the feed delivery pipe, and the other side edge of the Faraday cylinder is connected with an electric field induction plate 4 which is parallel to the Faraday cylinder and has an outward working surface. The electric field induction plate 4 is fixed by a bolt penetrating through the inner cylinder and the outer cylinder of the Faraday cup, and the electric field induction plate is connected with the inner cylinder of the Faraday cup and is insulated from the outer cylinder. And a photoelectric static tester 5 is arranged in the sealing chamber 2, is opposite to the working surface of the electric field induction plate 4 at a certain interval, and is fixedly connected with the vertical wall of the sealing chamber 2 through a cross beam.

The bottom of the Faraday cylinder is provided with a hole 31, and an inclined plate is arranged below the hole 31, so that materials entering the Faraday cylinder can return to the material conveying pipe 1 and do not leak into the sealed chamber. The size of the hole 31 at the bottom of the Faraday cylinder 3 is adjusted and fixed through a baffle 32 and a baffle fixing bolt 33 which are installed at the bottom of the Faraday cylinder, namely, the material quantity in the Faraday cylinder is adjusted through manually adjusting the size of the hole at the bottom of the Faraday cylinder, so that materials with certain quality or volume are always kept in the Faraday cylinder when powder flows through a pipeline (the size of the hole at the bottom of the Faraday cylinder can be adjusted in advance according to field process parameters during application).

the static electricity tester 5 measures the static electricity signal on the electric field induction plate 4, and the static electricity signal is converted into a material charge quantity signal after being transmitted and processed by the signal processing equipment 6.

the powder static monitoring device is arranged on the vertical air-conveying material pipeline through flanges 7 at the upper feeding port and the lower feeding port.

when the pipeline powder static monitoring device works, the Faraday cylinder is used as a powder material collector, when materials in a pipeline enter the Faraday cylinder 3 through the feed inlet, the size of the hole 31 at the bottom of the Faraday cylinder is adjusted in advance to ensure that the materials with certain mass or volume are always kept in the Faraday cylinder 3 when the powder flows through the pipeline, so that a static electric field signal is generated.

An electrostatic electric field in the material collector is transmitted to the electric field induction plate 4 through a conductor, a photoelectric electrostatic measuring instrument 5 converts a detected electric field signal into a standard industrial signal (4-20 milliamperes) through a signal processing device 6, and then transmits the standard industrial signal to a control system, so that accurate material charging information is provided.

parts not described in the above modes can be realized by adopting or referring to the prior art.

It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.