The structure of the low flow rotary cup flowmeter

Abstract: The structure information of the low-flow rotary cup flowmeter is provided by the excellent flowmeter and flowmeter manufacturers and quotation manufacturers. 1. The induction part is the most important part of the instrument, it receives the energy of the water flow and converts it into the rotary motion of the bell. The rotary cup (1) is made of six conical cups glued together with fixed rings in the same direction. There is a hole in the middle of the fixing ring, and a rotating shaft (2) is installed. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the details of the structure of the low-flow rotary cup flowmeter. 1. The induction part is the most important part of the instrument, it receives the energy of the water flow and converts it into the rotary motion of the bell. The rotary cup (1) is made of six conical cups glued together with fixed rings in the same direction. There is a hole in the middle of the fixing ring, and a rotating shaft (2) is installed, and the two are fastened together by the fixing cap (22) of the rotating disc to form a rotating body. The rotating shaft (2) is the center of the rotating mechanism, the upper end is inserted into the transmission seat (13), and is in contact with the agate bearing on the top; On the tip of (20), a precise support system is formed. The upper end of the thimble (20) is a cone, and the needle tip is a very smooth spherical surface, which is installed in the middle of the thimble (19). When in use, it is installed in the lower hole of the yoke, against the jewel bearing, and supports the full load of the rotating part. The outer diameter of the head is covered by a bell housing on the rotating shaft, forming a labyrinth to prevent the intrusion of river water. After the work is completed, the thimble and the plug must be cleaned, and the instrument oil must be injected to prevent the thimble from rusting. At the same time, take out the rotary disc holder instead of the head and install it in the lower hole of the yoke. The oil chamber of the rotary disc holder must be filled with cotton and filled with instrument oil. There is an oil chamber on the top of the head, which should be filled with instrument oil during use, so that the thimble and the jewel bearing work in the oil bath. In this way, the sensitivity of the instrument is ensured; at the same time, the wear of the thimble and the jewel bearing is reduced, thereby prolonging the service life of the instrument. 2. The function of the communication mechanism is to convert the number of revolutions of the rotary cup into an electrical pulse signal, which is composed of a tongue tube (10) and a magnetic steel (4). Working principle: A pair of movable contacts in the tongue tube have dual functions of magnetic and electrical conductivity. When the magnetic steel on the rotating shaft rotates to the side of the reed tube, the tongue piece is magnetized. When the magnetic field is strong enough, the magnetic force overcomes the elastic force of the piece and attracts each other, so that the two pieces are connected. When the magnet turns to the other side, the magnetic field weakens, and the piece is broken by its own elastic force. Therefore, every time the rotary cup rotates, the two tongues are connected once, and the counter sends out a signal. Possible failures and ways to overcome and avoid: The magnetic steel is facing the tongue tube for too long, and the piece is magnetized and may generate residual magnetic force, so that although the magnetic steel turns to the other side, the piece does not disengage. At this time, the communication part can be taken out, the tongue tube can return to normal after it is separated from the magnetic field, and then it can be put in to work. In order to avoid this phenomenon, when the instrument is packed, the position of the rotary cup should be fixed. This position can be checked by the counter, turn the rotary cup, whichever does not send a signal. The tongue tube has high sensitivity, and the cooperation relationship with the magnetic steel is very strict. Each tongue tube is very accurately assigned to the corresponding magnet at the factory. Therefore, the tongue tube and the magnetic steel of different instruments cannot be interchanged, and the position of the tongue tube should not be changed. If the tongue tube is damaged, the rotating shaft and communication parts can be sent to the factory for repair. The magnetic steel on the rotating shaft should not be attracted by iron blocks (such as screwdrivers), nor should it be close to the magnetic field, and the two rotating shafts should not be placed together during cleaning to avoid the weakening of the magnetic force. The service life of the tongue tube is 107 times under the condition of 24V and 100mA. The protective cover (3) is used to protect the various parts of the communication mechanism and should be tightened to prevent water from entering. 3. The tail wing is the balance part of the instrument, which can make the instrument axially follow the water flow when measuring the current. It consists of a criss-cross tail (24) and a counterweight (26). When the flow rate is less than 0.1~0.2m/s, the counterweight should be removed and the tail rod installed (see Figure 1). Before measurement, the horizontal position of the instrument should be corrected in local still water, and the balance weight (balance ring) can be adjusted for this purpose. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Structure of Low Flow Rate Rotary Cup Flow Meter'

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