CN202329705U - Composite structure of metal rotameter - Google Patents

Abstract

The utility model provides a combination structure of a metal rotor flowmeter, which includes a measurement system and a displacement sensing device. The measurement system includes a cone tube and a magnetic float. The displacement sensing device includes a pointer assembly, a dial and a converter. Shaft, induction magnet and pointer, the induction magnet is fixed at one end of the rotating shaft, the magnetic field direction of the induction magnet is opposite to that of the magnetic float, and the pointer is fixed at the other end of the rotating shaft; the converter includes angular displacement magnet, linear Angular displacement sensor, integrated circuit board and liquid crystal display, the angular displacement magnetic steel is fixed on the rotating shaft, the linear angular displacement sensor is fixed on the integrated circuit board, the linear angular displacement sensor is close to the angular displacement magnetic steel, between the integrated circuit board and the liquid crystal display Connect via data cable. The utility model adopts a linear angular displacement sensor as a magnetic float displacement detection element, removes the complex nonlinear correction and mechanical structure in the prior art, and improves the measurement accuracy.

Description

Combination structure of metal rotameter

technical field

The utility model relates to a metal rotor flowmeter, in particular to a combined structure of a metal rotor flowmeter.

Background technique

The metal tube rotameter adopts the variable area measurement principle, which uses the energy of the flow to detect, and the flow does not require external power. The measuring body of the rotameter is composed of a vertical conical tube that expands from bottom to top and a float that can move freely along the axial direction of the conical tube. When the float in the conical tube moves up and down, the precisely magnetized magnetic coupling system in the converter drives the pointer to rotate, and then reads the corresponding flow value through the dial and pointer; therefore, the area of the ring gap between the float and the conical tube changes with the The movement of the float changes, and the flow through the pipe can be calculated by measuring the height of the float in the tapered pipe. The combined structure of the existing metal tube rotameter includes a metal tube rotameter and a displacement sensing device. The displacement sensor in the combined structure of the existing metal rotameter usually adopts a differential transformer sensor and a capacitive angular displacement sensor; However, the use of these two displacement sensors to detect the displacement of the float cannot realize the full electronicization, miniaturization and intelligence of the converter of the flowmeter. Among them, due to the limitation of the principle and structure of the differential transformer sensor, it is difficult for the displacement detection system composed of the differential transformer to meet the explosion-proof requirements, which undoubtedly limits its application in the field of flammable and explosive Although the detection system composed of capacitive angular displacement sensors has a relatively simple structure and is relatively convenient to adjust, it can also be made into a cost-safe or flameproof explosion-proof structure, which expands the scope of use of the flowmeter. , but the above two kinds of displacement sensors need to obtain the displacement signal corresponding to the flow rate, corresponding nonlinear correction and complex mechanical structure are required to realize, which will cause many transmission links of the converter, complex structure, friction, and make the hysteresis Increased, thereby reducing the measurement accuracy of the metal rotameter.

Utility model content

The technical problem solved by the utility model is to provide a combined structure of the metal rotor flowmeter with a simple structure, which can improve the measurement accuracy of the metal rotor flowmeter.

The technical scheme of the utility model is: a combined structure of a metal rotor flowmeter, including a measurement system and a displacement sensing device, the measurement system includes a conical tube and a magnetic float located in the conical tube, and the feature is that the displacement The sensing device includes a pointer assembly, a dial and a converter, wherein the pointer assembly includes a rotating shaft, an induction magnet and a pointer, the induction magnet is fixed at one end of the rotation shaft, and the induction magnet is close to the magnetic float , and the direction of the magnetic field of the induction magnet is opposite to the direction of the magnetic field of the magnetic float, and the pointer is fixed at the other end of the rotating shaft; the converter includes an angular displacement magnet, a linear angular displacement sensor, an integrated circuit board and a liquid crystal display, so The angular displacement magnet is fixed on the rotating shaft, the linear angular displacement sensor is fixed on the integrated circuit board, and the linear angular displacement sensor is close to the angular displacement magnetic steel, and the distance between the integrated circuit board and the liquid crystal display is are connected by data lines.

The angular displacement magnet is in the shape of a ring.

The liquid crystal display is fixed on the dial.

The beneficial effects of the utility model are: the utility model simplifies the structure of the converter, which makes the structure simpler, and adopts the linear angular displacement sensor as the magnetic float displacement detection element at the same time, which removes the complicated nonlinear correction and Mechanical structure, thus improving the measurement accuracy.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a structural schematic diagram of the angular displacement magnet and the linear angular displacement sensor in the utility model.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

Referring to Fig. 1 and Fig. 2, a combined structure of a metal rotameter, including a measuring system and a displacement sensing device, the measuring system includes a conical tube 1 and a magnetic float 2 located in the conical tube 1, and the displacement sensing device includes a pointer assembly , a dial 5 and a converter, wherein the pointer assembly includes a rotating shaft 3, an induction magnet 6 and a pointer 4, the induction magnet 6 is fixed on one end of the rotation shaft 3, the induction magnet 6 is close to the magnetic float 2, and The magnetic field direction of the induction magnet 6 is opposite to that of the magnetic float 2, and the pointer 4 is fixed on the other end of the rotating shaft 3, wherein the upper end of the magnetic float 2 is an N pole, and the lower end of the magnetic float 2 is an S pole. The upper end of 6 is S pole, and the lower end of induction magnet 6 is N pole. The converter includes an angular displacement magnet 7, a linear angular displacement sensor 8, an integrated circuit board 9 and a liquid crystal display 10, the liquid crystal display 10 is fixedly installed on the dial 5, the angular displacement magnet 7 is in the shape of a ring, and the angular displacement magnet 7 Fixed on the rotating shaft 3, the linear angular displacement sensor 8 is fixed on the integrated circuit board 9, the linear angular displacement sensor 8 is close to the angular displacement magnetic steel 7, and the integrated circuit board 9 and the liquid crystal display 10 are connected by data lines.

The working principle of the utility model is:

When the measured fluid flows through the tapered tube from bottom to top, the magnetic float generates displacement, and the angle of the magnetic field line passing through the linear angular displacement sensor will change, so that the linear angular displacement sensor outputs a corresponding voltage, and the output voltage is input to the integrated circuit board for processing. After processing, the standard current signal corresponding to the flow can be output, and the measured value can be displayed on the liquid crystal display. The design of the linear angular displacement sensor measurement technology eliminates the complex mechanical structure in the prior art and improves the measurement accuracy.

Claims (3)

1. A combined structure of a metal rotameter, comprising a measuring system and a displacement sensing device, the measuring system comprising a tapered tube and a magnetic float located in the tapered tube, characterized in that: the displacement sensing device includes a pointer assembly , dial and converter, where, The pointer assembly includes a rotating shaft, an induction magnet and a pointer, the induction magnet is fixed at one end of the rotation shaft, the induction magnet is close to the magnetic float, and the direction of the magnetic field of the induction magnet is opposite to that of the magnetic float , the pointer is fixed at the other end of the rotating shaft; The converter includes an angular displacement magnet, a linear angular displacement sensor, an integrated circuit board and a liquid crystal display, the angular displacement magnetic steel is fixed on the rotating shaft, and the linear angular displacement sensor is fixed on the integrated circuit board , and the linear angular displacement sensor is close to the angular displacement magnet, and the integrated circuit board and the liquid crystal display are connected by data lines. 2. The combined structure of the metal rotameter according to claim 1, characterized in that: the angular displacement magnet is in the shape of a ring. 3. The combined structure of the metal rotameter according to claim 1, wherein the liquid crystal display is fixed on the dial.

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