JPS5866819A - Flowmeter - Google Patents

Abstract

PURPOSE:To smooth the rotating effect of rotors without receiving the effect of gnawing of fine particles and to permit normal flow rate measurement by applying high viscosity liquid contg. fine particles to a special structural body having prescribed recesses. CONSTITUTION:When special liquid such as COM flows into a flowmeter A, a pair of rotors 5 mesh with each other and rotate. The rotors 5 have the shape of a helical gear and fine particles are transferred without gnawing into their tooth parts 7. The confining effect of the measuring liquid generated by the rotation of the rotors 5 and the reverse effect thereof are eliminated by the recesses 8a, 8b formed on the end surfaces on both sides of the rotors 5 and the recesses 9 formed on both sides of a metering chamber 3, whereby the transfer of the high viscosity liquid is smoothed. A piston 14 is forced upward by the pressure difference between the inflow side of the flowmeter A and the inside of a lubricating oil pot 12, by which the lubricating oil is supplied into an oil well 21. This oil acts upon the chamber 3 side through the spacings between rorot shafts 6 and carbon bearings 26 and the slideways of the bearings 26 are maintained always in a smooth condition.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tIt meter for highly viscous liquids containing fine particles using a helical gear rotor.

Recently, with the depletion of oil, the development of alternative energy has become active, and people are calling for an abandonment of coal fuel.

Coal powder is added to heavy oil and mixed with CU, M (
An alternative fuel called Coal has become widely used.

This COM contains a fraction of fine coal powder of about 200 METSU 7 U (fine particles of about 211 III), but if shoes are left in heavy oil, fI7F- will settle, so a special surfactant is added to DΩ. The current situation is that the patient is suffering from fractional deafness.

In addition, the viscosity of COM itself is 3000 cp to 8000
It spans the Cp range and the temperature range is 60°C to 90°C.
It is an extremely difficult liquid to measure.

A high viscosity liquid (hereinafter referred to as
, simply called a special liquid. ) cannot be easily measured with a conventional positive displacement flowmeter (trade name: oval flowmeter) that uses an elliptical gear as a rotor because it has a confined part.

For example, the above-mentioned special liquid can clog the meshing or contacting parts of the rotors and damage the rotor, or particles can enter the rotor shaft and cause damage to the rotor shaft and bearings. Furthermore, there are disadvantages in that the rotating parts become resistant to adhesion and coagulation, making rotation impossible and causing various problems.

This invention was made by focusing on the oblique point, and the object is to provide a flowmeter that can accurately measure the above-mentioned special liquid at a normal flow rate without any trouble.

Another feature of the present invention is that the rotor is constructed using a helical wheel and an axle, and the flowmeter is capable of smoothly transferring a special liquid without being affected by the coughing up of fine particles. It is on offer.

Furthermore, another feature of the present invention is that the confinement action of the measured fluid that occurs between the rotor of the pair of hasp gears and the opposite action thereof, which occurs between the rotor and both sides of the measuring chamber, is prevented by the rotation of the rotor of the pair of hasp gears. To provide a rheometer in which a rotor can be easily rotated by allowing the fluid to escape easily through recesses bored on both end faces of the measuring chamber and recesses formed on both side faces of a metering chamber.

Furthermore, another feature of the present invention is that lubricating oil is supplied to the rotor shaft of the rotor by using the pressure of the measured fluid acting on the inlet side of the main body. To provide a flow meter which is equipped with a forced lubricating oil supply device to prevent special liquid from entering a rotor shaft and bearings.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

First, the flow meter main body A has an inlet 1 and an outlet 2 opened, and a pair of rotors 5 in a flow meter body 4 equipped with a metering chamber 3.
, 5 are accommodated by the rotor shafts 6, 6 to form a single unit. The front 8 points and 1 trochanter 5.5 have the desired tooth profile curve,
It is constituted by a helical gear that is formed under a desired twist rate such as a cubic or a quadratic tooth portion. A pair of rotors 5.5
The number of teeth in the tooth portion 7 may be the same or different.

However, if the number of teeth is large, the confined metering space becomes narrow, which tends to impede smooth transfer of the special liquid.

Next, rotor shafts 6 are attached to both end surfaces of the pair of rotors 5.5.
．． A recess 8a is bored inside centering on the tooth 7.
A #4 inclined recess 8b is bored in the tip of the recess 8b facing the direction of rotation, and serves as an escape for the special liquid subjected to the confining action, and as a feeder for the special liquid in the case of reverse action, to prevent the special liquid from being engulfed or sealed. This eliminates inconveniences such as crowding.

In addition, recesses 8a and 8bK%j of this rotor 5.5 and recesses 9 that communicate with the recesses 8a and 8b in which the special liquid can be stored and placed are bored on both sliding surfaces of the measuring chamber 3, and the above-mentioned This helps ensure smoother rotation of the rotor 5.5.

Note that this concave structure is the same as that proposed in Utility Model Application No. 131, 1983, which was previously developed by Yoshito Honde.

Furthermore, the forced lubricating oil supply device 10 will be described in detail below.

Regarding the symbols, 11 is a pressure introduction part provided on the input side of the flow meter main body A, 12 is a lubricating oil pot provided to the nuclear pressure introduction part 11 via a perofram 13, and 14 is a bellow flamm 1.
a piston connected to 3 and sliding within the pot lz;
Reference numeral 15 denotes a small cylinder part connected to the upper end of the pot 12, into which the upper part of the piston rod 16 protruding from the piston 14 is introduced, and a main magnet 17 is fixed thereto. The indicator 19 is formed by forming a magnetic coupling with the magnet 18 and interlocking the driven grinding stone 18 with the driving magnet 11.
The current amount of lubricating oil in the pot 12 can be displayed between. Reference numeral 20 denotes an oil supply pipe whose one end is connected to the lubricating oil bot 12 marked Mi+, and which can be connected to the oil reservoir 21 which communicates the flow il:ig' to the left and right bearings of the main body A.

An on-off valve 22 and a flow control valve 23 are located in the middle of the pipe 20.
This is provided. 24 is an oil supply coupler capable of supplying dWI lubricant, 25 is a bearing plate, and 26 is the trochanter shaft.

Carbon bearings b, 27#'i, and 01C/g are shown, respectively.

The operation will be explained based on the diagonal configuration.

C (JM) When a special liquid such as tL* flows through the pipe and enters the inlet 1 of the meter body A, the 91 pairs of trochanters 5.5 provided in the measuring chamber 3 apply rotational force. and rotate in mesh with each other.

At this time, since the pair of rotors 5, 5 have the shape of hasp gears, the fine particles Fi are transferred without being bitten by the toothed portion 1. In particular, (b) the confinement of the measured liquid caused by the rotation of the trochanter 5.5 and its reverse effect are caused by the rotation of the trochanter 5.5.
Recesses 8a and 8b formed on both end surfaces of 5 and measuring chamber 30
It can be easily removed by the recesses 9 formed on both sides, and the viscous resistance of the high viscosity fluid can be alleviated, making it possible to transfer the fluid more smoothly.

Since the recesses 8a * 8b and the recesses 9 are in communication with each other, a confining action of the welfare fluid acts on one side end surface of the rotor 5.5, but a confinement action acts on the other side end surface of the rotor 5.5. Since the sending action in the opposite direction works, the fluid in the recess 9 is sent out to the recess 8a, Bbkt&+, and the first rotor 5
, 5 does not interfere with the rotation.

Next, lubricating oil from a lubricating oil bot 12 is constantly supplied to oil reservoirs 21 on the left and right sides of the Kfi quantity measuring body body through an oil supply pipe 20.

That is, the piston 14 is pushed up by the pressure difference between the pressure P1 on the inlet port 1 side of the flow meter main body A and the pressure P2 in the lubricating oil pot 12, and this action causes lubricating oil to be supplied to the oil grip 21. rotor shaft 6.6 and carbon bearing 2
@j lubricating oil acts toward the inside of the measuring chamber 3 from between the measuring chamber 3 and the measuring chamber 3, and the special liquid measured in the measuring chamber 3 passes through the insertion points of the rotor shafts 6, 6 of the measuring chamber 3. This prevents the carbon from leaking to the outside, and conversely pushes it back into the measuring chamber 3, making it possible to keep the sliding surface of the carbon bearing 26 clean at all times.

It goes without saying that the O-ring 21 also prevents the special liquid from entering the bearing 26.

By the way, when the piston 14 is pushed up, the driving magnet 11 of the rod 16 also moves up in the small cylinder part 15, causing the driven magnet I8 to follow the lubricating oil in the Ml"1 oil pot +2, so the indicator 19 shows the lubricating oil. You can now display the lid.

Therefore, the lubricating oil indicator 19 is rWMPTYJ
When approaching , the oil supply coupler 24 can be removed and new lubricating oil can be supplied.

Further, this forced lubricating oil supply device 10 also includes a lubricating oil pot 12.
The indicator 19 has a sealed structure that is completely isolated from the outside, and the indicator 19 is also composed of a magnetic coupling between the main magnet 17 and the driven magnet 18, so the display can be easily made and the structure can be simplified. Since the structure of 12 can be made into a closed structure, if the type is open to the atmosphere, the amount of lubrication will be larger than necessary and the consumption of lubricating oil will be large. It has the effect of supplying oil.

Next, the piston 14 is protected by the Perot 7 ram 13, so the fine particles in the special liquid are absorbed by the piston 14 and the pot 1.
There is no fear that the piston will become inoperable due to engagement on the sliding surface with the piston, and the piston can move very smoothly and effortlessly.

Although one embodiment of the present invention has been described above, both sides of the measuring chamber 3 can be formed by incorporating separate parts by end faces &3a.

According to the present invention, a high viscosity liquid containing fine particles such as COM can be transported through a special process using a rotor consisting of a pair of hasp gears with concave portions on both end faces and a concave portion in the measuring chamber. By providing this structure, it is possible to measure the flow without difficulty by eliminating phenomena such as galling or jamming, and even if the measured liquid tries to enter the thin rotor bearing part, the forced lubricating oil supply device prevents the lubricating oil from flowing intermittently. Since it is constantly supplied to the bearing part of the rotor shaft from the outside of the main body, the bearing part is constantly kept clean and the rotary bearing function of the thin rotor shaft is not deteriorated.

In addition, this forced lubricating oil supply system (white) uses a piston equipped with a perofram to slide inside the lubricating oil bot, so that fine particles do not stick to the pot circumferential surface together with the piston and disable the piston operation. Since it is a sealed type and has a magnetic coupling structure consisting of two main magnets and a driven magnet, it has the practical benefit of ensuring reliable operation and extremely smooth supply of lubricating oil.

Therefore, according to the present invention, it is possible to measure a monoviscosity liquid containing and dispersing fine particles at a high viscosity without any problems like a normal flow meter.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional explanatory diagram showing the overall configuration of a flow meter showing an embodiment of the present invention, Fig. 2 is a side view showing an example of the above rotor, and Fig. 3 shows the shape of both sides of the metering chamber. FIG. A...Flowmeter body 3...Measuring chamber 5.5...Rotor 6.6...Rotor shaft 7... - Teeth 8a, 8b...Recess 9...Recess lO...Forced lubricant supply device 12...Lubricant pot No. 11゛4 No. 3 l '1

Claims (1)

[Scope of Claims] n) A pair of meshing rotors formed by recessing both side end faces of a helical gear with a desired twist rate and tooth profile curve can be freely rotated by bearings in a measuring chamber by a rotor shaft. 1. A positive displacement flowmeter, characterized in that a forced lubricating oil supply device is provided in the bearing. (2) The positive displacement flowmeter according to claim 1, wherein the measuring chamber in contact with both ends of the rotor has four holes on both sides so as to communicate with the recess of the rotor. (3) The forced lubricating oil supply device supplies lubricating oil to an oil reservoir communicating with a bearing of the flowmeter main body by a piston disposed through a bellows frame at the pressure of the measured fluid on the inlet side of the flowmeter main body, and fI4 A positive displacement flowmeter according to claim 1 or 2, wherein the current amount of lubricating oil in the lubricating oil pot can be displayed with an indicator such as a magnetic coupling disposed above the lubricating oil pot. .