CN2380909Y

CN2380909Y - Self-cablibrating capacitor level-gage

Info

Publication number: CN2380909Y
Application number: CN 99224054
Authority: CN
Inventors: 赵明旭
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-06-08
Filing date: 1999-06-08
Publication date: 2000-05-31
Anticipated expiration: 2009-06-08

Abstract

The utility model relates to a self-calibrating capacitor level-gage which comprises a measurement sensor and a calibrating sensor, wherein, the calibrating sensor is composed of a capacitor signal transmission line, and an upper and a lower insulating closing ends; the measurement sensor is composed of a metallic conductor, and an insulating sheath, a shielding layer and an over-sheath which are successively sheathed on the metallic conductor. The lower end of the capacitor signal transmission line is sealed in the lower insulating closing end in an insulating mode, and the upper end of the capacitor signal transmission line and the lower end of the measurement sensor are sealed in the upper insulating closing end in an insulating mode.. The metallic conductor of the capacitor signal transducer and the insulating sheath are respectively connected with the metallic conductor and the insulating sheath of the measurement sensor to form an integral structure. The utility model can automatically compensate the variation influences of the temperature, the pressure, etc. In addition, the measurement accuracy is high.

Description

Self-calibrating capacitor-type liquid level gauge

The utility model belongs to a kind of measurement mechanism of liquid level.

At present artificial method is still adopted in the measurement of liquid level in domestic many wet tanks, and this is not only very inconvenient, has very big danger, and measures untimelyly, can not realize that remote clustered measures and control the requirement of incompatibility modern management automatically.For the storage tank of High Temperature High Pressure, the artificial especially institute of poisonous and harmful medium is irrealizable.

The automatic measuring liquid level meter of supplying on the market is of a great variety now, and the product of multiple principles such as float-ball type, pressure transducer formula, laser type, ultrasonic type is arranged.The mechanical part that has frequent activities that has, what have is stable very poor, changed by physical parameters such as measured medium temperature, density and the influence of environmental change, makes accuracy of measurement and long-time stability very undesirable.

The purpose of this utility model, provide a kind of can be to temperature, pressure, Media density, specific inductive capacity, environmental baseline, the influence that component aging, power source change etc. produced compensates automatically, the self-calibrating capacitor-type liquid level gauge of measuring accuracy height, good stability.Be applicable to the level gauging of conductive fluid medium.

The purpose of this utility model adopts following technical proposals to realize, that is:

Self-calibrating capacitor-type liquid level gauge comprises survey sensor, calibrating sensors and support.

Calibrating sensors by the condenser type signal transmssion line, insulate end socket and go up the insulation end socket and form down.The condenser type signal transmssion line, by plain conductor, the insulating sheath, screen layer and the oversheath that are sleeved on successively on the plain conductor are formed.Screen layer is metal knitted net, or metal forming.Under the end socket that insulate, form by the nut and the bolt of an end opening, bolt has center pit, at one end is filled with insulating material in the nut of opening.Last insulation end socket is made up of nut and bolt, and nut has wire through-hole on the lower surface, and bolt has center pit.In nut, be filled with insulating material.The lower end of condenser type signal transmssion line screws in bolt in stretching into insulating material in the nut from the bolt hole of the end socket that insulate down, with condenser type signal transmssion line lower end insulation-encapsulated under insulate in the end socket.The insulating material in the wire through-hole insertion nut of the upper end of condenser type signal transmssion line from the nut lower surface of last insulation end socket.

Survey sensor, by plain conductor and the insulating sheath, screen layer and the oversheath that are sleeved on successively on the plain conductor form.Insert in the insulation end socket from the bolt hole of last insulation end socket the survey sensor lower end, and the plain conductor of survey sensor is fixedlyed connected with the plain conductor of calibrating sensors, and is an one-piece construction.The insulating sheath of survey sensor docks with the insulating sheath of calibrating sensors, and is an one-piece construction.Screw bolt, the upper end insulation-encapsulated of condenser type signal transmssion line that makes the lower end of survey sensor and calibrating sensors is in last insulator cap.

Support is made up of base, center stand column and a plurality of pole.The lower end of center stand column is fixed on the base middle part, a plurality of pole is separately fixed on the periphery of base.The end socket that insulate down is fixed on the lower end of center stand column, and the condenser type signal transmssion line is wrapped on a plurality of poles, and survey sensor Yanzhong heart column stretches out support.

Above-mentioned support can add an outer cover, and there is center pit the outer cover upper surface, and stretch out from this center pit the upper end of survey sensor.

A plurality of grooves are arranged on the above-mentioned pole.

The utility model can carry out comprehensively compensation automatically to the influence of the influential quantitative changeizations of institute such as temperature, pressure, Media density, specific inductive capacity, environmental baseline, component aging, power source change, has the accuracy of measurement height, long-time stability are good, advantages such as applied range easy to install.

Fig. 1 is the structural representation of a kind of embodiment of the present utility model, and Fig. 2 is survey sensor, calibrating sensors and upper and lower insulation end socket assembling synoptic diagram, and Fig. 3 is a supporting structure synoptic diagram.

Below in conjunction with the embodiment accompanying drawing, the utility model is described in further detail.

Self-calibrating capacitor-type liquid level gauge comprises survey sensor 1, calibrating sensors 2, support.

Calibrating sensors by the condenser type signal transmssion line, insulate end socket and go up the insulation end socket and form down.The condenser type signal transmssion line is made up of plain conductor 4, insulating sheath 5, screen layer 6 and oversheath 7, and plain conductor 4 is a copper conductor.Under the end socket that insulate form by nut 8 and bolt 9, there is internal thread nut 8 upper ends, bolt 9 has center pit 10, is filled with insulating material 11 in nut 8, insulating material 11 is the teflon adhesive tape.Last insulation end socket is made up of nut 12, bolt 13, and there is internal thread nut 12 upper ends, and wire through-hole 14 is arranged on the lower end surface, are filled with insulating material 15 in nut 12, and insulating material 15 also is the teflon adhesive tape.Bolt 13 has wire through-hole.

Survey sensor is made up of plain conductor 16, insulating sheath 17, screen layer 18 and oversheath 19.Insulating sheath 17, screen layer 18 and oversheath 19 are sleeved on the plain conductor 16 successively, and plain conductor 16 is a copper cash.

Insulating sheath 5, screen layer 6, oversheath 7 are sleeved on successively and constitute the condenser type signal transmssion line on the copper conductor 4.The lower end of condenser type signal transmssion line is stretched in the nut 8 from the center pit 10 of bolt 9, and be inserted in the insulating material 11, screw bolt 9, bolt 9 and nut 8 are tightened together, insert in the nut 12 from the wire through-hole 14 of nut 12 upper end of condenser type signal transmssion line, the lower end of survey sensor has center pit to insert in the nut 12 from bolt 13, screws bolt 13.Copper conductor 4 is connected with copper conductor 16, and is an one-piece construction; Insulating sheath 5 is connected with insulating sheath 17, and is an one-piece construction.

Support is made up of base 20, center stand column 21, four poles 22 and shell body 23.The lower end of center stand column 21 is fixed on the centre of base 20, and the lower end of four poles 22 is separately fixed on the periphery of base 20, and a plurality of grooves are arranged on the pole 22.Shell body 23 lower ends connect with base 20 with screw thread, on the upper surface of shell body 23 porose 3.

The end socket that insulate down is fixed on the bottom of center stand column, and the condenser type signal transmssion line curls on four poles 22, and survey sensor is outside shell body 23 is stretched out in hole 3.

Claims

1, self-calibrating capacitor-type liquid level gauge comprises survey sensor (1), calibrating sensors (2) and support, it is characterized in that:

A, survey sensor (1) are made up of plain conductor (16), insulating sheath (17), screen layer (18) and oversheath (19), and insulating sheath (17), screen layer (18), oversheath (7) are sleeved on the plain conductor (16) successively;

B, calibrating sensors (2) by the condenser type signal transmssion line, insulate end socket and go up the insulation end socket and form down; The condenser type signal transmssion line is made up of plain conductor (4), insulating sheath (5), screen layer (6) and oversheath (7), and insulating sheath (5), screen layer (6) and oversheath (7) are sleeved on the plain conductor (4) successively; Under the end socket that insulate form by nut (8) and bolt (9), there is internal thread nut (8) upper end, bolt (9) has center pit (10), be filled with insulating material (11) in the nut (8), insert in the interior insulating material (11) of nut (8) from the center pit (10) of bolt (9) lower end of condenser type signal transmssion line, and bolt (9) connects with nut (8) with screw thread; Last insulation end socket is by nut (12), bolt (13) is formed, wire through-hole (14) is arranged on the lower surface of nut (12), upper port has internal thread, be filled with insulating material (15) in the nut (12), the upper end of condenser type signal transmssion line is inserted in the insulating material (15) of nut (12) lining from wire through-hole (14), the lower end of survey sensor (1) is stretched in the insulating material (15) of nut (12) lining from the wire through-hole of bolt (13), plain conductor (16) is fixedlyed connected with plain conductor (4) and is an one-piece construction, insulating sheath (5) is fixedlyed connected with insulating sheath (17) and is an one-piece construction, and bolt (13) connects with nut (12) with screw thread;

C, support are made up of base (20), center stand column (21), a plurality of pole (22), and the lower end of center stand column (21) is fixed on the centre of base (20), and the lower end of a plurality of poles (22) is separately fixed on the periphery of base (20); The sealing cap that insulate down is fixed on the bottom of center stand column (21), and the condenser type signal transmssion line is wrapped on a plurality of poles (22).

2, self-calibrating capacitor-type liquid level gauge according to claim 1, it is characterized in that described plain conductor (4) and (16) are copper conductor, on described base (20), be provided with shell body (23), shell body (23) connects with base (20) with screw thread, shell body (23) upper surface porose (3), the upper end of survey sensor (1) from the hole (3) stretch out outside the housing.