CN113188625A

CN113188625A - Roots flowmeter

Info

Publication number: CN113188625A
Application number: CN202110324968.XA
Authority: CN
Inventors: 陈灼联
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-03-26
Filing date: 2021-03-26
Publication date: 2021-07-30

Abstract

The invention relates to the technical field of instruments and meters and discloses a waist wheel flowmeter, wherein two rotating shafts with two ends respectively extending into a bottom cover and a top cover are movably arranged in a metering chamber, a transmission cavity is arranged inside the top cover, a pair of meshed synchronous gear rings is movably arranged inside the transmission cavity, an installation sleeve shaft is movably installed in the transmission cavity at the center of the synchronous gear ring, a transmission gear column is movably installed between the inner ring of the synchronous gear ring and the outer ring of the installation sleeve shaft at one side of the transmission cavity close to the magnetic coupler, the inner ring of the synchronous gear ring is uniformly and fixedly provided with driven blocks in a ring shape, the outer ring of the mounting sleeve shaft is uniformly and fixedly provided with rotating blocks in a ring shape, the rotating blocks and the driven blocks are same in quantity and distributed at intervals, and a structure convenient to disassemble is arranged in the flowmeter, and the structure such as the transmission gear ring is arranged in the top cover to replace the traditional transmission structure, so that the measurement precision is improved, and the service life is prolonged.

Description

Roots flowmeter

Technical Field

The invention relates to the technical field of instruments and meters, in particular to a waist wheel flowmeter.

Background

The speed of circulation needs to be detected in the transportation of petroleum or gas, generally adopt to install the flowmeter in the pipeline to measure, the waist wheel flowmeter is just a kind of commonly used, it has advantages such as precision height, good reliability, light in weight, long-lived, installation convenient to use and receives wide popularity, its principle is to utilize a pair of waist wheels to rotate and calculate the number of times of rotation under the drive of fluid, can calculate the velocity of flow in the volume of the internal measuring chamber of cooperation known flowmeter, this kind of flowmeter is simple, the precision is high but has certain problem yet:

1. the conventional waist wheel flowmeter is complex in internal installation structure, generally cannot be detached after installation, internal fluid can pass through the pipeline after the installation of two ends is finished through the flange plates, so that when the internal waist wheel or transmission part breaks down or large impurities are generated inside and directly block the inside of the metering chamber, the whole flowmeter needs to be detached from the pipeline for repair, time is wasted when the flowmeter is detached from the pipeline, certain time is wasted when the internal waist wheel is detached from the flowmeter and replaced, and the use efficiency is reduced on the whole;

2. when carrying out flow detection, because fluidic flow inequality is regular, just cause the change that the velocity of flow of intermittent type nature is neglected little easily, will cause the condition that the lumbar gear produces and rock like this, rock and can cause the noise on the one hand, its vibration of on the other hand can influence the precision that detects, thereby when utilizing synchronous gear drive to produce when neglecting little change big speed will cause to produce between gear and pivot thereby subsequent rotation transmission effect appear the pause and the condition that rocks the increase when great friction clearance, the precision and the life of flowmeter have been influenced.

Disclosure of Invention

Aiming at the defects of the background technology, the invention provides the waist wheel flowmeter which has the advantages of convenience in disassembly and replacement and long service life, and solves the problems in the background technology.

The invention provides the following technical scheme: a waist wheel flowmeter comprises a casing, wherein flow guide ports are symmetrically formed in two sides of the casing, a bottom cover is fixedly mounted at one end of the casing, a top cover is fixedly mounted at the other end of the casing, a flow display is fixedly mounted on the outer side of the top cover, a metering chamber is formed in the casing, two rotating shafts with two ends respectively extending into the bottom cover and the top cover are movably mounted in the metering chamber, a waist wheel is fixedly mounted on the outer ring of each rotating shaft, a transmission cavity is formed in the top cover, a pair of meshed synchronous toothed rings are movably mounted in the transmission cavity, a mounting sleeve shaft is movably mounted in the center of each synchronous toothed ring in the transmission cavity, a magnetic coupler is movably mounted between each synchronous toothed ring and the flow display in the top cover, a limiting pin is movably mounted at the end face of each rotating shaft in the bottom cover, and a clamping block is fixedly clamped on the outer side of the limiting pin, the outside screw thread of chucking piece has cup jointed the spiral end cover, there is the driving gear post transmission chamber is close to magnetic coupling one side and is located movable mounting between synchronous ring gear inner circle and the installation sleeve outside of tubes circle, the inner circle of synchronous ring gear is cyclic annular even fixed mounting and has the driven piece, one side fixed connection cover piece of driven piece, the outer lane of installation sleeve is cyclic annular even fixed mounting and has the commentaries on classics piece, change the piece and distribute with the driven piece quantity the same and alternate, the commentaries on classics piece is inside to be offered and has cup jointed the movable groove with the cover piece activity, the installation sleeve is close to casing one side and is offered the draw-in groove that cup joints with the pivot activity.

Preferably, the inner end of the clamping groove is a tapered long groove, the end part of the rotating shaft is clamped in the clamping groove through a taper, and the depth of the clamping groove is set according to detected fluid.

Preferably, the height of the synchronizing gear ring is the same as that of the mounting sleeve shaft, the height of the driven block is half of the height of the synchronizing gear ring, and the mounting position is close to one side of the machine shell.

Preferably, the length that transmission gear post extends in the transmission cavity is less than half of synchronous ring height, the outside of commentaries on classics piece is circular-arc and is provided with the tooth key, half of transmission gear post outer lane be provided with the driven tooth key of commentaries on classics piece meshing, half of transmission gear post outer lane sets up to the semi-arc face that the circular arc angle increases.

The invention has the following beneficial effects:

1. through the inside installation sleeve axle that has the draw-in groove that sets up of top cap, and set up the chucking piece at the bottom, spiral end cover isotructure, compare in prior art, utilize the inside trepanning that one end has the draw-in groove can fixed joint that sets up of flowmeter and can fix the position of its length at the other end, can be convenient dismantle change inside waist wheel, a large amount of time has been saved, simultaneously can also direct operation on the pipeline, only need do benefit to the online operation with both ends valve port floodgate is tight, utilize the inside limit structure that sets up of end cover can guarantee the accuracy when dismantling the installation, work efficiency has been improved on the whole.

2. Through having set up the synchronizing ring in that the top cap is inside, installation sleeve shaft and transmission gear post structure, compare in prior art, utilize the commentaries on classics piece can directly drive its slew velocity and slow down when the lumbar gear rotational speed slows down, but the synchronizing ring does not receive the influence, consequently the commentaries on classics piece is compared in synchronizing ring slew velocity and descends, just drive the commentaries on classics piece and compare in synchronizing ring to opposite direction motion, but drive transmission gear post this moment and rotate and take cambered surface side rotation to 7 inboard effects that realize friction braking of synchronizing ring make synchronizing ring and installation sleeve shaft synchronous rotations, guarantee that the precision that detects reduces the impact vibration that inside velocity of flow changes and bring simultaneously, guarantee the permanent use of flowmeter.

Drawings

FIG. 1 is an overall transverse half-sectional view of the structure of the present invention;

FIG. 2 is an overall longitudinal half-sectional view of the structure of the present invention;

FIG. 3 is a schematic view of a structural synchronizer ring according to the present invention;

FIG. 4 is a schematic view of a structural mounting sleeve of the present invention;

FIG. 5 is a schematic view of a structural drive gear column of the present invention;

FIG. 6 is a schematic view of the inventive synchronizing ring gear;

FIG. 7 is a cross-sectional view taken along line A-A of FIG. 2;

fig. 8 is a cross-sectional view taken along line B-B of fig. 6.

In the figure: 1. a housing; 101. a flow guide port; 102. a metering chamber; 2. a bottom cover; 3. a top cover; 301. a transmission cavity; 4. a flow display; 5. a waist wheel; 6. a rotating shaft; 7. a synchronizing ring gear; 701. a driven block; 702. sleeving blocks; 8. a magnetic coupler; 9. installing a sleeve shaft; 901. rotating the block; 902. a movable groove; 903. a card slot; 10. a spacing pin; 11. a clamping block; 12. a spiral end cap; 13. and (5) a transmission gear column.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-8, a roots flowmeter comprises a casing 1, wherein flow guide ports 101 are symmetrically arranged on two sides of the casing 1, a bottom cover 2 is fixedly arranged at one end of the casing 1, a top cover 3 is fixedly arranged at the other end of the casing 1, a flow display 4 is fixedly arranged on the outer side of the top cover 3, a metering chamber 102 is arranged in the casing 1, two rotating shafts 6 with two ends respectively extending into the bottom cover 2 and the top cover 3 are movably arranged in the metering chamber 102, a roots 5 is fixedly arranged on the outer ring of the rotating shafts 6, a transmission cavity 301 is arranged in the top cover 3, a pair of meshed synchronous toothed rings 7 are movably arranged in the transmission cavity 301, an installation sleeve shaft 9 is movably arranged in the transmission cavity 301 at the center of the synchronous toothed rings 7, a magnetic coupler 8 is movably arranged in the top cover 3 between the synchronous toothed rings 7 and the flow display 4, and a limit pin 10 is movably arranged in the bottom cover 2 at the end face of the rotating shafts 6, the outer side of the limiting pin 10 is fixedly clamped with a clamping block 11, the outer side of the clamping block 11 is in threaded sleeve connection with a spiral end cover 12, one side of a transmission cavity 301, which is close to the magnetic coupler 8, is positioned between the inner ring of the synchronizing toothed ring 7 and the outer ring of the mounting sleeve shaft 9, a transmission gear column 13 is movably mounted between the inner ring of the synchronizing toothed ring 7 and the outer ring of the mounting sleeve shaft 9, the inner ring of the synchronizing toothed ring 7 is annularly and uniformly and fixedly mounted with a driven block 701, one side of the driven block 701 is fixedly connected with a sleeve block 702, the outer ring of the mounting sleeve shaft 9 is annularly and uniformly and fixedly mounted with a rotating block 901, the rotating block 901 and the driven block 701 are identical in number and distributed at intervals, a movable groove 902 is movably sleeved with the sleeve block 702 inside the rotating block 901, and a clamping groove 903 movably sleeved with the rotating shaft 6 is formed in one side of the mounting sleeve shaft 9, which is close to the machine shell 1.

Wherein, the inner of draw-in groove 903 is the rectangular groove of taper, and the tip of pivot 6 passes through the taper joint and sets for in draw-in groove 903 and the degree of depth of draw-in groove 903 according to the fluid that detects, and the pivot 6 joint can be very convenient dismantlement of realization pivot 6 in the draw-in groove 903, can select suitable installation sleeve axle 9 to use according to the fluid condition of difference, more does benefit to accurate detection.

Wherein, the height of synchronizing ring gear 7 is the same with the height of installation sleeve axle 9, and driven piece 701 highly be half of synchronizing ring gear 7 height and the mounted position is close to casing 1 one side, and driven piece 701 needs to be driven by commentaries on classics piece 901 and rotates, but it can not disturb the normal work of transmission gear post 13 to driven piece 701 is pivoted, thereby will hit transmission gear post 13 if its overlength and influence flow detection, and such structure divides the labour and can reduce the structure space when guaranteeing work efficiency.

The length of the extension of the transmission gear column 13 in the transmission cavity 301 is smaller than half of the height of the synchronizing gear ring 7, the outer side of the rotating block 901 is arc-shaped and provided with a toothed key, half of the outer ring of the transmission gear column 13 is provided with a toothed key which is in meshed transmission with the rotating block 901, the other half of the outer ring of the transmission gear column 13 is a semi-arc surface with an increased arc angle, the rotating block 901 can directly drive the rotating speed of the rotating block to be reduced when the rotating speed of the waist wheel 5 is reduced, but the synchronizing gear ring 7 is not affected, so that the rotating block 901 is reduced in rotating speed compared with the synchronizing gear ring 7, the rotating block 901 is driven to move in the opposite direction compared with the synchronizing gear ring 7, the transmission gear column 13 is driven to rotate at the moment, the arc-surface side rotating belt is supported to the inner side of the synchronizing gear ring 7, the effect of friction braking is achieved, the synchronizing gear ring 7 and the mounting sleeve shaft 9 synchronously rotate, and the detection precision is guaranteed.

According to the working principle, when fluid enters the metering chamber 102 through the diversion port 101, the waist wheel 5 is driven to rotate, the waist wheel 5 rotates and is transmitted to the installation sleeve shaft 9 through the rotating shaft 6, then the installation sleeve shaft 9 drives the rotating block 901 to rotate and pushes the driven block 701 to rotate, the synchronous gear ring 7 is driven to rotate, and the fluid is transmitted to the flow display 4 through the magnetic coupler 8 to display the flow speed condition; when the flowmeter needs to be disassembled, the screw end cover 12 needs to be unscrewed to disassemble the clamping block 11, the limiting pin 10 is removed, and the rotating shaft 6 is pulled out, so that the waist wheel 5 can be taken out of the flow guide opening 101 for replacement, convenience and simplicity are realized, and then a new rotating shaft 6 can be installed in by repeating the opposite steps, so that the end part of the rotating shaft 6 is ensured to be aligned to the position of the clamping groove 903, and the condition of dislocation in installation is avoided;

when the flow rate of the fluid is suddenly decelerated and then accelerated, the mounting sleeve shaft 9 enables the rotating block 901 to be separated from the sleeve block 702 to a certain extent when the fluid is decelerated, at the moment, the rotating block 901 drives the transmission gear column 13 to rotate and rotates one end of the outer side to be in contact with the inner ring of the synchronous gear ring 7 to play a braking role, so that the rotating speed of the rotating block is reduced to be matched with the real-time rotating speed of the mounting sleeve shaft 9, meanwhile, the effect of vibration reduction can be achieved by utilizing the effect of gear transmission, the speed of the synchronous gear ring 7 can be controlled by the mounting sleeve shaft 9, the effect of vibration reduction can be achieved by moving compressed air inside the rotating block 901 through the sleeve block 702 when the fluid is accelerated, and meanwhile, the transmission effect can also be guaranteed.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a roots flowmeter, includes casing (1), and water conservancy diversion mouth (101), its characterized in that have been seted up to the bilateral symmetry of casing (1): the improved flowmeter is characterized in that a bottom cover (2) is fixedly mounted at one end of the casing (1), a top cover (3) is fixedly mounted at the other end of the casing (1), a flow display (4) is fixedly mounted at the outer side of the top cover (3), a metering chamber (102) is arranged in the casing (1), two rotating shafts (6) with two ends respectively extending into the bottom cover (2) and the top cover (3) are movably mounted in the metering chamber (102), a waist wheel (5) is fixedly mounted on the outer ring of each rotating shaft (6), a transmission cavity (301) is arranged in the top cover (3), a pair of meshed synchronous toothed rings (7) are movably mounted in the transmission cavity (301), a mounting sleeve shaft (9) is movably mounted at the center of the synchronous toothed rings (7) in the transmission cavity (301), and a magnetic coupler (8) is movably mounted between the synchronous toothed rings (7) and the flow display (4) in the top cover (3), a limiting pin (10) is movably mounted at the end face of the rotating shaft (6) in the bottom cover (2), a clamping block (11) is fixedly clamped at the outer side of the limiting pin (10), a spiral end cover (12) is sleeved at the outer side of the clamping block (11) in a threaded manner, a transmission gear column (13) is movably mounted between the inner ring of the synchronizing gear ring (7) and the outer ring of the mounting sleeve shaft (9) at one side of the transmission cavity (301) close to the magnetic coupler (8), driven blocks (701) are uniformly and fixedly mounted on the inner ring of the synchronizing gear ring (7) in an annular manner, a sleeve block (702) is fixedly connected to one side of the driven block (701), rotating blocks (901) are uniformly and fixedly mounted on the outer ring of the mounting sleeve shaft (9) in an annular manner, the rotating blocks (901) and the driven blocks (701) are in the same number and are distributed at intervals, a movable groove (902) is movably sleeved with the sleeve block (702) in the rotating block (901), one side of the mounting sleeve shaft (9) close to the casing (1) is provided with a clamping groove (903) movably sleeved with the rotating shaft (6).

2. The roots meter of claim 1, wherein: the inner end of the clamping groove (903) is a taper long groove, the end part of the rotating shaft (6) is clamped in the clamping groove (903) through a taper, and the depth of the clamping groove (903) is set according to detected fluid.

3. The roots meter of claim 1, wherein: the height of the synchronous gear ring (7) is the same as that of the mounting sleeve shaft (9), the height of the driven block (701) is half of that of the synchronous gear ring (7), and the mounting position of the driven block is close to one side of the machine shell (1).

4. The roots meter of claim 1, wherein: the length that transmission gear post (13) extension is less than half of synchronous ring gear (7) height in transmission chamber (301), the outside of turning block (901) is circular-arc and is provided with the tooth key, half of transmission gear post (13) outer lane is provided with the tooth key with turning block (901) meshing transmission, the other half of transmission gear post (13) outer lane sets up the semicambered surface that the circular arc angle increases.