Magnetostriction liquid level transmitter

Abstract

The utility model relates to the technical field of transmitters, in particular to a magnetostrictive liquid level transmitter which comprises a transmitter, a measuring tube and a magnetic floater, a scraper used for cleaning the surface of the measuring tube is arranged at the bottom of the magnetic floater, the scraper can move on the magnetic floater, and the measuring tube is arranged on the measuring tube. A limiting seat is arranged at the end part of the measuring tube, and a control structure for controlling the scraper to move on the magnetic floater to shake off pollutants is arranged on the limiting seat. The device has the advantage of automatically cleaning the surface of the measuring tube.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transmitters, and particularly relates to a magnetostrictive liquid level transmitter. BACKGROUND

[0002] The magnetostrictive liquid level transmitter is a high-precision liquid level measuring device and is widely used in the fields of petrochemical industry, water treatment and tank monitoring. The core principle thereof is based on the Wiedemann effect and the inverse magnetostrictive effect, and non-contact liquid level detection is achieved by measuring the time difference of mechanical wave propagation in the waveguide wire. The typical structure comprises a measuring tube, a float assembly, a waveguide wire, a signal processing module and the like. In operation, the float moves up and down with the liquid level, and the built-in magnetic ring thereof produces a magnetic coupling effect with the waveguide wire. When the controller transmits a current pulse, a spiral magnetic field is formed on the surface of the waveguide wire, interacts with the magnetic field of the float to generate a torsional stress wave, and the time difference of the stress wave propagating to the pickup coil is detected, so that the position of the float and the corresponding liquid level value can be accurately calculated. However, it is found that the surface of the measuring tube is easily contaminated by the medium during long-term use, especially in the working conditions of viscous liquid (such as crude oil and emulsion) or containing suspended particles, and the medium residues will adhere to the outer wall of the measuring tube to form a scaling layer. This contamination phenomenon will cause two prominent problems: firstly, when the float moves along the axial direction of the measuring tube, the scaling material may cause mechanical jamming, resulting in the float stagnation or jumping movement, and causing measurement error; secondly, the accumulation of pollutants on the pipe wall will change the magnetic coupling efficiency between the magnetic ring of the float and the waveguide wire, affecting the generation strength and propagation speed of the stress wave signal, and finally causing the liquid level indication value to drift. CONTENT OF THE UTILITY MODEL

[0003] In order to clean the surface of the measuring tube, the present application provides a magnetostrictive liquid level transmitter.

[0004] The present application provides a magnetostrictive liquid level transmitter, which adopts the following technical scheme

[0005] A magnetostrictive liquid level transmitter, comprising a transmitter, a measuring tube and a magnetic float, the bottom of the magnetic float is provided with a scraper for cleaning the surface of the measuring tube, the scraper is movable on the magnetic float, the end of the measuring tube is provided with a limiting seat, and the limiting seat is provided with a control structure for controlling the scraper to move on the magnetic float to shake off the pollutants.

[0006] In one embodiment, the bottom of the magnetic float is provided with a movable sleeve, the scraper is slidably mounted on the movable sleeve, and an elastic member is arranged between the scraper and the movable sleeve.

[0007] In one embodiment, the scraper is in the form of a circular ring, and the cutting edge of the scraper is in contact with the surface of the measuring tube.

[0008] In one of the embodiments: the scraper includes a connecting seat slidingly installed on the movable sleeve, and a cutter head clamped on the connecting seat, and the cutter head is made of elastic material.

[0009] In one of the embodiments: the cutting edge of the cutter head is arranged obliquely.

[0010] In one of the embodiments: the movable sleeve is threadedly connected to the bottom of the magnetic float.

[0011] In one of the embodiments: the connecting seat is connected with a retaining ring at the rear of the movable sleeve, and the elastic member is a spring with two ends respectively abutting against the retaining ring and the movable sleeve.

[0012] In one of the embodiments: the control structure is a plurality of elastic hooks, and the scraper is provided with clamping ears for clamping the elastic hooks.

[0013] In one of the embodiments: the magnetic float is provided with at least one stabilizing ring, and the stabilizing ring includes a tensioning member and a plurality of supporting rollers, and the supporting rollers are abutted against the surface of the measuring tube through the tensioning member. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a structural schematic view of the embodiment;

[0015] Figure 2 is a structural schematic view of the magnetic float and the scraper in the embodiment.

[0016] In the figure, 100 is a transmitter, 200 is a measuring tube, 300 is a magnetic float, 400 is a scraper, 410 is a connecting seat, 411 is a clamping ear, 420 is a cutter head, 430 is a retaining ring, 500 is a movable sleeve, 510 is an elastic member, 600 is a limiting seat, 700 is a control structure, 800 is a stabilizing ring, 810 is a tensioning member, and 820 is a supporting roller. DETAILED DESCRIPTION

[0017] In order to further illustrate the technical means and effects adopted by the utility model to achieve the predetermined utility model purposes, the specific embodiments, structures, features and effects according to the utility model are described in detail as follows in combination with the drawings and the preferred embodiments.

[0018] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", etc. indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0019] A magnetostrictive liquid level transmitter, such asFigure 1 As shown, it comprises a transmitter 100, a measuring tube 200 and a magnetic float 300, the measuring tube 200 is installed on the transmitter 100, and the magnetic float 300 is slidingly installed on the measuring tube 200.

[0020] The bottom of the magnetic float 300 is provided with a scraper 400 for cleaning the surface of the measuring tube 200, and the bottom of the magnetic float 300 is provided with a movable sleeve 500, which is threadedly connected to the bottom of the magnetic float 300.

[0021] The scraper 400 comprises a connecting seat 410 slidingly installed on the movable sleeve 500 and a blade head 420 clamped to the connecting seat 410, the connecting seat 410 is in the form of a cylindrical sleeve installed on the measuring tube 200 and connected to a stop ring through the movable sleeve 500, and in the embodiment, the stop ring is threadedly connected to the connecting seat 410.

[0022] The movable sleeve 500 is provided with an installation groove, and an elastic member 510 is installed in the installation groove, the elastic member 510 is a spring, and the two ends of the spring are respectively abutted with the stop ring and the movable sleeve 500. Through the improved arrangement, the scraper 400 is slidingly installed on the movable sleeve 500.

[0023] The blade head 420 is made of elastic material, and the end of the connecting seat 410 is provided with a clamping groove for clamping the blade head 420.

[0024] The blade head 420 is in the form of a circular ring, and the cutting edge of the blade head 420 is in contact with the surface of the measuring tube 200, and the cutting edge of the blade head 420 is inclined. Through the inclined arrangement, combined with the elastic material, when encountering pollutants that cannot be scraped off, the elastic and inclined design is realized to avoid.

[0025] A limiting seat 600 is arranged at the lower end of the measuring tube 200, and the limiting seat 600 is provided with a control structure 700 for controlling the scraper 400 to move on the magnetic float 300 to shake off the pollutants.

[0026] The control structure 700 is a plurality of elastic hooks, which can be supported by plastic or elastic steel with a certain elasticity, and in the embodiment, three elastic hooks are taken as an example, and the three elastic hooks are distributed at equal intervals.

[0027] The scraper 400 is provided with a clamping lug 411 for clamping the elastic clamping hook, the clamping lug 411 is arranged on the connecting seat 410, and the clamping lug 411 is a ring-shaped protruding structure in the embodiment. When the magnetic float 300 is located at the bottom, the clamping lug 411 of the connecting seat 410 is clamped into the elastic clamping hook under the action of the gravity of the magnetic float 300, when the liquid level rises to cause the magnetic float 300 to float up, the magnetic float 300 is first moved up, and the connecting seat 410 and the cutter head 420 are clamped by the elastic clamping hook, when the elastic member 510 is stretched to a certain extent, the clamping lug 411 is separated from the elastic clamping hook, at this time, the cutter head 420 is caused to form a rapid vibration effect under the action of the elastic member 510, so that the surface contaminants are shaken off.

[0028] The magnetic float 300 is provided with at least one stabilizing ring 800, the stabilizing ring 800 comprises a tensioning member 810 and a plurality of supporting rollers 820, the tensioning member 810 is an elastic rubber ring, and the plurality of supporting rollers 820 are abutted to the surface of the measuring tube 200 through the tensioning member 810.

[0029] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form, although the utility model has been disclosed as above with a preferred embodiment, however, is not used to limit the utility model, any person skilled in the art, without departing from the technical scheme range of the utility model, can make some changes or modifications for equivalent embodiments with the disclosed technical content, as long as the changes or modifications do not depart from the technical scheme content of the utility model, and any modification, equivalent change and modification of the above embodiment according to the technical essence of the utility model, still belong to the range of the technical scheme of the utility model.

Claims

1. A magnetostrictive liquid level transmitter comprising a transmitter (100), a measuring tube (200) and a magnetic float (300), characterized in that: The bottom of the magnetic float (300) is provided with a scraper (400) for cleaning the surface of the measuring tube (200), the scraper (400) is movable on the magnetic float (300), the end of the measuring tube (200) is provided with a limiting seat (600), the limiting seat (600) is provided with a control structure (700) for controlling the scraper (400) to move on the magnetic float (300) to shake off the contaminants.

2. A magnetostrictive liquid level transmitter as defined in claim 1, wherein: The bottom of the magnetic float (300) is provided with a movable sleeve (500), the scraper (400) is slidably installed on the movable sleeve (500), and the scraper (400) and the movable sleeve (500) are provided with an elastic member (510).

3. A magnetostrictive liquid level transmitter according to claim 2, wherein: The scraper (400) is arranged in a circular ring shape, and the blade of the scraper (400) is in contact with the surface of the measuring tube (200).

4. A magnetostrictive liquid level transmitter according to claim 3, wherein: The scraper (400) comprises a connecting seat (410) slidably installed on the movable sleeve (500), and a blade head (420) clamped on the connecting seat (410), and the blade head (420) is made of elastic material.

5. A magnetostrictive liquid level transmitter as defined in claim 4 wherein: The blade of the blade head (420) is arranged in an inclined manner.

6. A magnetostrictive liquid level transmitter as defined in Claim 4 wherein: The movable sleeve (500) is threadedly connected to the bottom of the magnetic float (300).

7. A magnetostrictive liquid level transmitter as defined in claim 6 wherein: The connecting seat (410) is connected with a stop ring after being arranged in the movable sleeve (500), and the elastic member (510) is a spring with two ends abutting against the stop ring and the movable sleeve (500) respectively.

8. A magnetostrictive liquid level transmitter as defined in claim 2 wherein: The control structure (700) is a plurality of elastic hooks, and the scraper (400) is provided with a clamping lug (411) for clamping the elastic hooks.

9. A magnetostrictive liquid level transmitter as defined in claim 1 wherein: The magnetic float (300) is provided with at least one stabilizing ring (800), the stabilizing ring (800) comprises a tensioning member (810) and a plurality of supporting rollers (820), and the supporting rollers (820) are abutted against the surface of the measuring tube (200) through the tensioning member (810).

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