CN2348366Y

CN2348366Y - Sectional capacitive material level sensor

Info

Publication number: CN2348366Y
Application number: CN 98239731
Authority: CN
Inventors: 张宝柱
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-12-23
Filing date: 1998-12-23
Publication date: 1999-11-10
Anticipated expiration: 2008-12-23

Abstract

The utility model discloses a material level signal sensor for storage in a deep bin, composed of a plurality of insulating units which are connected. Each unit is used as one electrode of a capacitor, and a steel cable which plays a role in increasing strength is used as the other electrode of th capacitor; the units are respectively connected with corresponding amplifiers, and the purpose of monitoring is realized by a transducer, a controller and a display. The sensor can enhance the integral strength and measuring precision, being more suitable for being used under mal-conditions.

Description

A kind of sectional type capacitive level sensor

The utility model relates to a kind of thing position signal transducer, especially relates to a kind of sectional type capacitance signal sensor that is used for monitoring the thing position, dark storehouse of materials such as storage of liquids, powder, granule.Supporting uses such as this sensor and transmitter, display.

The dark storehouse level transducer of widespread use at present in use exists various deficiencies, and is big as the gap of two-plate, and induction part poor, segmentation exposes each other, and shock-resistant ability is low etc.ZL94240007.0 provides a kind of tubular type sectional capacitance sensor, is responsible for the outside because its segmental structure is fixed on, and structure is thin, and is not shock-resistant, often has phenomenons such as outside segmented electrode comes off, material folding to take place in therefore using, and causes signal error and signal fault.

For this reason, the purpose of this utility model is to provide a kind of sectional type capacitive level sensor that is used for dark warehousing storage, solves the problem that structure is thin, the impact resistance difference reaches easy generation signal error and signal fault.

The purpose of this utility model realizes by following structure: it is made up of the signal gathering unit of plurality of sections rigid attachment insulated from each other, each unit is all independently induction of signal and signal processing system, and it is fixed on storehouse roof and ground connection by flange and pedestal topmost.Each unit is welded in that end face is concordant by one section hollow form metal material and earrings up and down, after filling hard, wear-resisting, heat-resisting megohmite insulant between the earrings of per two unit correspondences, connect with securing member, become an independently utmost point of electric capacity of difference, after several such unit connected, the earrings of unit also adopted aforesaid mode to connect with a blind flange bottom.Blind flange is connected with upper end ground connection flange conducting by metallic conductor.

The utility model has utilized modern appearance sense principle, with the supporting use of electronic technology, has eliminated because the caused accumulated error of change in dielectric constant of medium improves measuring accuracy, and Stability Analysis of Structures is firm simultaneously, and anti-impact force is strong, and is applied widely.

Below in conjunction with accompanying drawing preferred forms of the present utility model is described further

Fig. 1 is the front view of the utility model sectional type capacitive level sensor

Fig. 2 is the vertical view of each signal gathering unit.

Fig. 3 is the front view of lower end blind flange

Fig. 4 is that insulation connects sectional view between earrings

Fig. 5 is a upper end ground connection flange front view

Preferred forms of the present utility model is achieved in that each unit is welded in the concordant mode of end face with each three earrings 2 up and down by one section metal tube 1, three earrings are 120 degree mutually, tube wall is a utmost point of this section inductance capacitance, and cable is by being connected to amplifier in the pipe.Be added with insulating washer between the earrings of per two unit correspondences, between the bolt nut of fastening usefulness and earrings, be added with insulation sleeve and insulating mat, reach the purpose that insulation connects.Blind flange 5 has six earrings, be 60 degree mutually, wherein three earrings insulate in the same way with unit bottom and connect, and remain three earrings and are connected with upper end ground connection flange 4 conductings by three wire rope of tightening, this is another utmost point of this inductance capacitance, is connected to amplifier by cable.Like this, wire rope passes through from the earrings indentation, there as a utmost point of electric capacity, and is close with the tube wall distance as another utmost point of electric capacity, increased the induction amount, sensitivity improves thereupon, and the earrings indentation, there is not easy material stock, has avoided the generation of spurious signal, simultaneously, with wire rope another utmost point as electric capacity, also made things convenient for installation widely, the wire rope of tightening also plays the effect of strengthening the sensor bulk strength.

Claims

1, a kind of sectional type capacitive level sensor that is used for dark warehousing storage, unit by a plurality of acquired signal is formed, each unit is separately as the utmost point of electric capacity, another very connects the conductor of the upper and lower side of sensor, it is characterized in that, each unit is welded in the concordant mode of end face with each three earrings (2) up and down by one section metal tube (1), three earrings are 120 degree mutually, between the earrings of per two unit correspondences (2), rigid attachment behind the filling insulant between the bolt nut of fastening usefulness and the earrings (2), after blind flange (5) and the insulation of the earrings of unit (2) the bottom rigid attachment, be connected with upper end ground connection flange (4) conducting by three conductors (6).

2, sectional type capacitive level sensor as claimed in claim 1 is characterized in that, described blind flange (5) has six earrings, is 60 degree mutually.

3, sectional type capacitive level sensor as claimed in claim 1 is characterized in that, the described conductor (6) that connects upper end ground connection flange (4) and lower end blind flange (5) is a wire rope.