CN209857996U - Volumetric flowmeter - Google Patents

Abstract

The utility model relates to a positive displacement flowmeter, including the flowmeter body, flowmeter body front end and rear end are equipped with the disk seat that magnetic sensor and installing support that are connected with the counter are connected respectively, be equipped with the conduction pipe that supplies the fluid to get into and run through the disk seat on the disk seat, conduction pipe outer wall edge is equipped with the filter screen, install the storage port of arranging in on the disk seat on the filter screen, disk seat one end is cup jointed on the center pin of rotor through driving fixed epaxial rotating vane, high magnetic path and low magnetic path are all installed through concentric hole cooperation respectively in disk seat inner wall both ends, be equipped with the magnetic dipole piece with rotor concerted movement between high magnetic path and the low magnetic path, be equipped with the inside clearance of casing of arranging in between magnetic dipole piece and the rotor, fixed mounting has the separation blade on. Has the advantages that: the utility model discloses avoided the pure motion between the machinery, utilized magnetism to rotate and reduced the wearing and tearing between the mechanical part, the safety and stability, the application is strong.

Description

Volumetric flowmeter

Technical Field

The utility model relates to a flowmeter technical field, concretely relates to positive displacement flowmeter.

Background

The volumetric flowmeter is a direct measurement type flowmeter which uses a mechanical measuring element to continuously divide a fluid into single fixed volume parts for discharge, and then measures and calculates the flow rate by counting the number of the fixed volume parts of the fluid discharged through the meter per unit time or within a certain time interval, and can be used for volumetric flow measurement of various liquids and gases.

The following problems exist in the operation of the prior positive displacement flowmeter:

1. the flowmeter is sensitive to dirt in the measured fluid, and when the diameter of the measured pipeline is larger, the flowmeter is heavier, and the metering precision is greatly influenced.

2. The rotating parts in the flowmeter body are generally in pure mechanical connection, are used for a long time and are easy to damage, and once the rotating parts break down, the metering work is influenced, the rotating parts also need to be dismounted, installed and debugged again, and the labor intensity of personnel is increased.

Therefore, design a result of use good, can detach impurity and safety and stability's positive displacement flowmeter is the utility model discloses a core place.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a positive displacement flowmeter provides a positive displacement flowmeter of safety and stability, the filter effect is good and convenient to use.

In order to realize the above purpose, the utility model discloses a technical scheme be: a positive displacement flowmeter comprises a flowmeter body, wherein a magnetic sensor connected with a counter and a valve seat connected with a mounting bracket are respectively arranged at the front end and the rear end of the flowmeter body, a conduction pipe for a fluid to enter and penetrate through the valve seat is arranged on the valve seat, a filter screen is arranged at the edge of the outer wall of the conduction pipe, a containing port arranged on the valve seat is arranged on the filter screen, one end of the valve seat is sleeved on a central shaft of a rotor through a rotating blade on a driving fixed shaft, a high magnetic block and a low magnetic block are respectively installed at the two ends of the inner wall of the valve seat through concentric holes in a matching manner, a magnetic dipole sheet moving with the rotor is arranged between the high magnetic block and the low magnetic block, a gap arranged inside a shell is arranged between the magnetic dipole sheet and the rotor, a separation blade is fixedly installed on the central shaft at one end of the inner wall of the rotor, the outer part of the, the magnetic sensor is magnetically connected with the magnetic coupling piece and transmits signals to the counter.

Furthermore, the valve seat is connected with the mounting support through a positioning pin, and the positioning pin selects the aperture size and the position according to a positioning hole in the mounting support.

Further, the inner wall of the valve seat and the rotating blades on the fixed shaft jointly form a metering chamber.

Furthermore, the O-shaped rings connected with the fixed shaft and the magnetic coupling sheet on the upper rotor shell are all arranged in the sealing cavity.

Further, the O-shaped ring is made of rubber or nylon.

The technical effects of the utility model reside in that: when fluid enters into flowmeter body from the conduction pipe on the disk seat, because positive displacement measuring element is higher to impurity sensitivity at first to be handled through the filter screen, the impurity that obtains is collected then is clear away together through accomodating the mouth, the pressure differential of intraductal fluid passes through the rotation that rotor blade drove the fixed axle, thereby drive the motion of rotor, high magnetic block and low magnetic path and the magnetic coupling piece that connects through concentric hole on the rotor form the magnetic coupling transmission, the pure motion between the machinery has been avoided, thereby on recording the operation number of times signal on the magnetic coupling and with data transfer to the counter through magnetic sensor, such positive displacement flowmeter has improved performance greatly, it is sealed effectual, guarantee the stable conveying between the structural component, application property is strong.

Drawings

Fig. 1 is a schematic structural diagram of a positive displacement flowmeter of the present invention;

fig. 2 is a schematic structural view of the rotor of the present invention.

Reference numerals: 1-a flow meter body; 2-a magnetic sensor; 3, mounting a bracket; 4-valve seat; 5-a conduction pipe; 6, filtering a screen; 7-a receiving port; 8, fixing the shaft; 9-a rotor; 10-a central axis; 11-concentric bore; 12-high magnetic block; 13-low magnetic block; 14-a magnetic dipole sheet; 15-clearance; 16-a baffle plate; 17-O-ring; 18-a valve cover; 19-positioning pin.

Detailed Description

Referring to the attached drawings 1-2, a positive displacement flowmeter comprises a flowmeter body 1, wherein a magnetic sensor 2 connected with a counter and a valve seat 4 connected with a mounting bracket 3 are respectively arranged at the front end and the rear end of the flowmeter body 1, a conducting pipe 5 for fluid to enter and penetrate through the valve seat 4 is arranged on the valve seat 4, a filter screen 6 is arranged at the edge of the outer wall of the conducting pipe 5, an accommodating port 7 arranged on the valve seat 4 is arranged on the filter screen 6, one end of the valve seat 4 is sleeved on a central shaft 10 of a rotor 9 through a rotating blade driving a fixed shaft 8, two ends of the inner wall of the valve seat 4 are respectively provided with a high magnetic block 12 and a low magnetic block 13 through concentric holes 11 in a matching manner, a magnetic dipole piece 14 moving together with the rotor is arranged between the high magnetic block 12 and the low magnetic block 13, and a gap 15 arranged in a shell is arranged between the, rotor 9 inner wall one end is close to fixed mounting has separation blade 16 on the center pin 10, the outside of magnetic couple piece 14 is in through O type circle 17 joint arrange in on the valve gap 18 of magnetic sensor 2 rear end, carry out magnetism between magnetic sensor 2 and the magnetic couple piece 14 and be connected and with signal transmission to the counter on.

As shown in fig. 1, the inner wall of the valve seat 4 and the rotating blades on the fixed shaft 8 together form a metering chamber, into which fluid enters and forms a "liquid-filled metering space" and is then continuously sent to the outlet, under given flow meter conditions, the volume of the measuring space is determined, and the flow value of the fluid in unit time is determined through the rotation times of the rotating component, a magnetic coupling sheet 14 which moves together with the rotor is arranged between the high-magnetic block 12 and the low-magnetic block 13, a gap 15 arranged in the shell is arranged between the magnetic coupling piece 14 and the rotor 9, the high-magnetic block 12 and the low-magnetic block 13 are matched with each other in the concentric hole 11, the magnetic coupling pieces 14 at the two ends of the gap 15 and the rotor 9 can rotate together magnetically, so that pure movement between machines is avoided, while compensating for the homogeneity of the magnetic surface on the rotor 9, the number of revolutions of the last magnetic coupling piece 14 is recorded by the magnetic sensor 2 and the data is fed back to the counter.

Preferably, be connected with through locating pin 19 on the disk seat 4 installing support 3, and locating pin 19 selects aperture size and position according to the locating hole of 3 on the installing support, and locating pin 19 on the disk seat 4 can carry out the aperture according to outside installing support 3 and select, be convenient for with the fixed connection of external installed part, increase stability, separation blade 16 on the rotor 9 adopts silicon steel can effectively play spacing protection's effect when rotating to fixed axle 8, improves the magnetic conductivity of rotor 9 simultaneously, reinforcing magnetic field density, reduce the electric conductivity.

Preferably, the O-rings 17 of the upper housing of the rotor 9, the fixed shaft 8 and the magnetic coupling piece 14 are all placed in a sealing cavity, the sealing cavity on the rotor 9 is used for ensuring that when the rotating member works, fluid is prevented from entering the cavity to affect the metering work, and meanwhile, the O-rings 17 are made of rubber or nylon and can have a certain buffering effect when the rotor stops running.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the principles of the present invention may be applied to any other embodiment without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (5)

1. A positive displacement flowmeter comprises a flowmeter body (1) and is characterized in that a magnetic sensor (2) connected with a counter and a valve seat (4) connected with a mounting bracket (3) are respectively arranged at the front end and the rear end of the flowmeter body (1), a conduction pipe (5) for a fluid to enter and penetrate through the valve seat (4) is arranged on the valve seat (4), a filter screen (6) is arranged at the edge of the outer wall of the conduction pipe (5), an accommodating port (7) arranged on the valve seat (4) is arranged on the filter screen (6), one end of the valve seat (4) is sleeved on a central shaft (10) of a rotor (9) through a rotating blade driving a fixed shaft (8), a high magnetic block (12) and a low magnetic block (13) are respectively installed at the two ends of the inner wall of the valve seat (4) through concentric holes (11) in a matched mode, a magnetic coupling sheet (14) moving together with the rotor is arranged between the high magnetic block (12) and the low magnetic block, be equipped with between magnetic couple piece (14) and rotor (9) and arrange inside clearance (15) of casing in, rotor (9) inner wall one end is close to fixed mounting has separation blade (16) on center pin (10), magnetic couple piece (14) outside is arranging in through O type circle (17) joint on valve gap (18) of magnetic sensor (2) rear end, carry out magnetism between magnetic sensor (2) and magnetic couple piece (14) and be connected and with signal transmission to the counter on.

2. A positive displacement flow meter according to claim 1, characterized in that the valve seat (4) is connected to the mounting bracket (3) by means of a positioning pin (19), and the positioning pin (19) is selected with regard to the size and position of the aperture in the positioning hole in the mounting bracket (3).

3. A positive displacement flow meter according to claim 1, wherein the inner wall of the valve seat (4) and the rotating vanes on the stationary shaft (8) together form a metering chamber.

4. A volumetric flowmeter according to claim 1, characterized in that the O-rings (17) of the rotor (9) upper housing, connected to the fixed shaft (8) and to the magnetic coupling plates (14) are placed in the sealed chamber.

5. A volumetric flow meter according to claim 1, characterized in that the O-ring (17) is made of rubber or nylon.