阅读说明：本技术 一种流量计 (Flow meter ) 是由 不公告发明人 于 2019-10-31 设计创作，主要内容包括：本发明属于流量计技术领域,具体的说是一种流量计；包括流体管、左法兰、右法兰、计数表和转动单元；流体管的一端与左法兰固连,另一端与右法兰固连,且左法兰和右法兰的孔径大小与流体管端部的孔径大小相等；转动单元位于流体管内,转动单元包括转盘、一号轴和扇叶；本发明通过横截面为沙漏状的流体管,使得污水在沙漏状流体管的窄部获得最大的动态压力,且静态压力达到最小,污水的速度由于流体管的横截面面积变化关系而上升,且由于转动单元位于沙漏状流体管窄部的左侧,使得转动单元能够及时的接受此流速而产生转动计数。(The invention belongs to the technical field of flowmeters, in particular to a flowmeter; the device comprises a fluid pipe, a left flange, a right flange, a counting meter and a rotating unit; one end of the fluid pipe is fixedly connected with the left flange, the other end of the fluid pipe is fixedly connected with the right flange, and the pore sizes of the left flange and the right flange are equal to the pore size of the end part of the fluid pipe; the rotating unit is positioned in the fluid pipe and comprises a turntable, a first shaft and fan blades; according to the invention, through the fluid pipe with the hourglass-shaped cross section, the sewage obtains the maximum dynamic pressure at the narrow part of the fluid pipe with the hourglass shape, the static pressure reaches the minimum, the speed of the sewage is increased due to the change of the cross section area of the fluid pipe, and the rotating unit is positioned at the left side of the narrow part of the fluid pipe with the hourglass shape, so that the rotating unit can timely receive the flow speed to generate the rotation counting.)

1. A flowmeter comprises a fluid pipe (1), a left flange (2), a right flange (3), a counter (4) and a rotating unit (5); one end of the fluid pipe (1) is fixedly connected with the left flange (2), the other end of the fluid pipe is fixedly connected with the right flange (3), and the aperture sizes of the left flange (2) and the right flange (3) are equal to the aperture size of the end part of the fluid pipe (1); the counting meter (4) is arranged in a groove in the outer wall of the fluid pipe (1) in a matched mode through a bolt and a nut; the rotating unit (5) is positioned in the fluid pipe (1), and the rotating unit (5) comprises a rotating disc (51), a first shaft (52) and fan blades (53); one end of the first shaft (52) is rotatably installed on a meter shell of the counting meter (4) through a bearing, one end of the first shaft is positioned below the counting meter (4), the other end of the first shaft (52) extends into the fluid pipe (1), and the other end of the first shaft is fixedly connected with the turntable (51); the fan blades (53) are uniformly arranged on the outer ring of the turntable (51); the fluid is introduced from right to left, so that the fan blades (53) drive the turntable (51) to rotate, and the counting of the counting meter (4) is realized; the method is characterized in that: the cross section of the fluid pipe (1) is hourglass-shaped, the narrow part of the hourglass-shaped fluid pipe (1) is positioned on the right side of the turntable (51), and the turntable (51) can rotate timely through the hourglass-shaped fluid pipe (1) to accurately count; a leakage net (6) with an inverted trapezoidal cross section is arranged on the upper surface of the turntable (51); the impurity in the sewage is prevented from winding on the first shaft (52) through the leakage net (6).

2. The flowmeter of claim 1, wherein: an annular groove (511) is formed in the rotary disc (51), and the annular groove (511) is located on the lower side of the fan blade (53); a group of cutting blocks (512) are arranged in the annular groove (511), the cutting blocks (512) rotate in the annular groove (511) at a different speed along with the rotation of the rotary disc (51), and the cutting surfaces in the cutting blocks (512) are positioned on one side far away from the rotary disc (51), so that impurities in sewage are prevented from being wound on the rotary disc (51).

3. A flowmeter according to claim 2, wherein: the lower surface of the turntable (51) is provided with a conical table (54); the tip of the conical table (54) is positioned on the side far away from the lower surface of the rotating disc (51), and the outer surface of the conical table (54) is coated with gravel.

4. A flowmeter according to claim 2, wherein: arc-shaped convex blocks (513) are uniformly arranged on the annular groove (511); the arc-shaped surface of the arc-shaped convex block (513) is positioned on one side close to the cutting block (512), the arc-shaped convex block (513) is installed in a first groove of the rotary disc (51) through a spring, the first groove is positioned on the lower side of the annular groove (511), and a steel wire rope (514) is arranged on the lower surface of the arc-shaped convex block (513); the end part of the steel wire rope (514) extends out of the conical surface of the conical table (54) by one centimeter, and burrs are remained after the steel wire rope (514) is polished in production; the arc-shaped convex blocks (513) are intermittently extruded by the cutting blocks (512), so that the steel wire ropes (514) are extended and retracted.

5. The flowmeter of claim 4, wherein: a group of barbs (515) are uniformly arranged on the outer ring of the steel wire rope (514); the cross section of the barb (515) is fishhook-shaped, and the tip of the barb (515) of the fishhook shape is bent inwards.

6. The flowmeter of claim 5, wherein: the distance between adjacent steel cords (514) in the conical surface along the conical table (54) is two centimeters.

Technical Field

The invention belongs to the technical field of flowmeters, and particularly relates to a flowmeter.

Background

Metering is on the eye of industrial production. The flow measurement is one of the components of the measurement science and technology, and has close relation with national economy, national defense construction and scientific research. The work is well done, the flowmeter has important effects on ensuring the product quality, improving the production efficiency and promoting the development of scientific technology, and particularly has more obvious status and effect in national economy in the current times that the energy crisis and the industrial production automation degree are higher and higher.

Traditional impeller-type flowmeter in market usually includes flow chamber and count table, and the flow intracavity is provided with the impeller, drives the impeller through the fluid and rotates, and then the impeller drives the transmission of the part count in the count table. However, when the traditional impeller-type flowmeter is used for measuring liquid with higher turbidity, impurities are very easy to entangle and block the impeller, the rotation resistance of the impeller is increased, the counting accuracy is influenced, and the cavity of the flow cavity is easy to accumulate impurities to damage the normal use of the flowmeter, so that the technical scheme is limited.

Disclosure of Invention

In order to make up for the defects of the prior art and solve the problem that the accumulation of impurities in a fluid pipe influences the use of a flowmeter, the invention provides the flowmeter.

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a flowmeter, which comprises a fluid pipe, a left flange, a right flange, a counting meter and a rotating unit, wherein the fluid pipe is arranged on the left flange; one end of the fluid pipe is fixedly connected with the left flange, the other end of the fluid pipe is fixedly connected with the right flange, and the aperture size of the left flange and the aperture size of the right flange are equal to the aperture size of the end part of the fluid pipe; the counting meter is arranged in a groove on the outer wall of the fluid pipe in a matching way through a bolt and a nut; the rotating unit is positioned in the fluid pipe and comprises a rotating disc, a first shaft and fan blades; one end of the first shaft is rotatably installed on a meter shell of the counting meter through a bearing, one end of the first shaft is positioned below the counting meter, the other end of the first shaft extends into the fluid pipe, and the other end of the first shaft is fixedly connected with the turntable; the fan blades are uniformly arranged on the outer ring of the turntable; the fluid is introduced from right to left, so that the fan blades drive the turntable to rotate, and the counting of the counting meter is realized; the cross section of the fluid pipe is hourglass-shaped, the narrow part of the hourglass-shaped fluid pipe is positioned on the right side of the turntable, and the turntable can be timely rotated to accurately count through the hourglass-shaped fluid pipe; a leakage net with an inverted trapezoidal cross section is arranged on the upper surface of the turntable; impurities in the sewage are prevented from being wound on the first shaft through the leakage net; when the flowmeter is used, firstly, the flowmeter is connected with a pipeline through the left flange and the right flange, and then, the counter is installed in a fluid pipe through the matching of nuts and bolts; when turbid sewage flows from right to left, the cross section of the fluid pipe is hourglass-shaped, so that the pipe diameter of the fluid pipe is gradually reduced and then gradually increased, when the sewage is positioned at the narrow part of the hourglass-shaped fluid pipe, the dynamic pressure reaches the maximum value, the static pressure reaches the minimum value, the speed of the sewage rises due to the change of the cross section area of the fluid pipe, and the rotating unit is positioned on the left side of the narrow part of the hourglass-shaped fluid pipe, so that the rotating unit can timely receive the flow speed to generate rotation counting; when the flabellum drives the carousel in the rotation, can get rid of the impurity in the sewage to the outside, impurity in the sewage will be to the downhill path department motion of the fluid pipe of hourglass form, and receive the slope influence of this downhill path department, the velocity of flow of sewage is fast in the downward motion of impurity in the sewage, pressure is little, and this downhill path department is owing to be the back that the sewage flows, the velocity of flow of sewage in this department is slow, it is powerful, impurity in the sewage can be pushed to the left port of fluid pipe naturally, reduce the accumulational risk of impurity in the sewage in the fluid pipe, and reduce the rotation number of times that impurity influences the flabellum in the sewage, guarantee flabellum pivoted flexibility, thereby improve the precision of this fluid meter count, and then improve the practicality of this flowmeter.

Preferably, the turntable is provided with an annular groove, and the annular groove is positioned on the lower side of the fan blade; a group of cutting blocks are arranged in the annular groove, the cutting blocks rotate in the annular groove at a different speed along with the rotation of the rotary table, and a cutting surface in each cutting block is positioned on one side far away from the rotary table, so that impurities in sewage are prevented from being wound on the rotary table; through setting up the cutting piece, flow along with sewage makes the flabellum drive the carousel and takes place to rotate, in the beginning, the cutting piece is static for the carousel, through the rotation of carousel, because inertial action, make the cutting piece at the ring channel internal rotation, and the slew velocity of cutting piece is less than the slew velocity of carousel, utilize pivoted cutting piece, cut the sewage impurity of probably winding on the carousel, avoid the impurity winding in the sewage to influence the count precision of count table in the carousel, thereby the practicality of this flowmeter has been improved.

Preferably, the lower surface of the turntable is provided with a conical table; the tip part in the conical table is positioned on one side far away from the lower surface of the rotary table, and gravel is coated on the outer surface of the conical table; through the arrangement of the conical table, impurities in the sewage cut by the cutting block flow to the middle part, the impurities are all positioned on the back of the flowing sewage, and the cut impurities are conveniently pushed to the left port of the fluid pipe; simultaneously, when the impurity in the sewage flows at the surface of toper platform after the cutting, its grit can carry out further grinding to this impurity for the whole volume of this impurity diminishes, is more convenient for be pushed to the left port department of fluid pipe, avoids impurity influence count table's count precision, thereby has improved flowmeter's practicality.

Preferably, the annular groove is uniformly provided with arc-shaped convex blocks; the arc-shaped surface of the arc-shaped convex block is positioned at one side close to the cutting block, the arc-shaped convex block is arranged in a first groove of the rotary table through a spring, the first groove is positioned at the lower side of the annular groove, and a steel wire rope is arranged on the lower surface of the arc-shaped convex block; the end part of the steel wire rope extends out of the conical surface of the conical table by one centimeter, and the steel wire rope is not polished in production, so that burrs are reserved; the arc-shaped convex blocks are discontinuously extruded by the cutting blocks, so that the steel wire rope is extended and retracted; through the arrangement, when the cutting block rotates in the annular groove and the cutting block extrudes the arc-shaped convex block, the arc-shaped convex block is extruded and moves to one side far away from the rotary table, so that the steel wire rope moves outwards, the contact area between the steel wire rope and impurities in sewage is increased, the steel wire rope with burrs is enabled to crush the impurities, and the whole volume of the impurities is further reduced; when the cutting block does not extrude the arc-shaped convex block, the arc-shaped convex block is reset under the action of the spring, so that the extending distance of the end part of the steel wire rope is kept at one centimeter from the conical surface of the conical table; through keeping stretching out and retracting of the wire rope that has the burr for becoming littleer of impurity, it can not twine on the carousel, influences the rotation of carousel, thereby influences the count precision of count table, thereby has improved the practicality of flowmeter.

Preferably, a group of barbs are uniformly arranged on the outer ring of the steel wire rope; the cross section of the barb is fishhook-shaped, and the tip of the fishhook-shaped barb is bent inwards; due to the barbs, when the steel wire rope moves to one side far away from the rotary table, the barbs in the conical table extend out, the barbs cut impurities, and the steel wire rope is arranged on the conical table, so that the steel wire rope rotates together with the conical table, the barbs have larger cutting force through rotation, and the cutting effect of the barbs on the impurities is improved; simultaneously, the barb sets up to fishhook-like, and the point portion incurve of fishhook shape barb for the two sides of barb all cuts impurity, and is unfavorable for impurity winding on the barb, influences later stage barb and to the secondary cutting of impurity, thereby has improved the cutting efficiency to impurity, avoids producing the influence to the count of count table, thereby has improved the count precision of count table.

Preferably, the distance between adjacent steel wire ropes in the conical surface along the conical table is two centimeters; through this kind of design for adjacent wire rope is in rotating, and the barb of installation can contact each other on the wire rope, and produces the interact, cuts probably the impurity of winding on the barb, avoids influencing the rotation of carousel because the winding of impurity, thereby influences the count precision of count table, and then has improved the practicality of flowmeter.

The invention has the following beneficial effects:

1. according to the flowmeter, the cross section of the fluid pipe is in the shape of the hourglass, so that sewage obtains the maximum dynamic pressure at the narrow part of the fluid pipe, the static pressure is the minimum, the speed of the sewage is increased due to the change of the cross section area of the fluid pipe, and the rotating unit is positioned on the left side of the narrow part of the fluid pipe, so that the rotating unit can timely receive the flow speed to generate rotation counting; simultaneously, the trapezoidal net that leaks of falling can prevent the impurity winding in the sewage on a spool, influences the count precision of count table to the practicality of this flowmeter has been improved.

2. According to the flowmeter, the cutting block is arranged, the fan blades drive the rotary table to rotate along with the flowing of sewage, so that the cutting block rotates in the annular groove, the rotating speed of the cutting block is smaller than that of the rotary table, the cutting block cuts impurities wound on the rotary table, and the counting precision of the counting meter is improved.

Drawings

The invention will be further explained with reference to the drawings.

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a cross-sectional view of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is an enlarged view of a portion of FIG. 3 at B;

fig. 5 is a perspective view of the rotating unit;

FIG. 6 is a schematic view of the barb configuration;

in the figure: fluid pipe 1, left flange 2, right flange 3, counter 4, rotation unit 5, carousel 51, annular groove 511, cutting block 512, arc lug 513, wire rope 514, barb 515, first axle 52, flabellum 53, toper platform 54, hourglass net 6.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1 to 6, the flowmeter of the present invention includes a fluid pipe 1, a left flange 2, a right flange 3, a counter 4, and a rotation unit 5; one end of the fluid pipe 1 is fixedly connected with the left flange 2, the other end of the fluid pipe is fixedly connected with the right flange 3, and the aperture sizes of the left flange 2 and the right flange 3 are equal to the aperture size of the end part of the fluid pipe 1; the counting meter 4 is arranged in a groove in the outer wall of the fluid pipe 1 through a bolt and a nut in a matching mode; the rotating unit 5 is positioned in the fluid pipe 1, and the rotating unit 5 comprises a rotating disc 51, a first shaft 52 and fan blades 53; one end of the first shaft 52 is rotatably installed on the meter shell of the counting meter 4 through a bearing, one end of the first shaft is positioned below the counting meter 4, the other end of the first shaft 52 extends into the fluid pipe 1, and the other end of the first shaft is fixedly connected with the turntable 51; the fan blades 53 are uniformly arranged on the outer ring of the turntable 51; the fluid is introduced from right to left, so that the fan blades 53 drive the turntable 51 to rotate, and the counting of the counting meter 4 is realized; the cross section of the fluid pipe 1 is hourglass-shaped, the narrow part of the hourglass-shaped fluid pipe 1 is positioned on the right side of the turntable 51, and the hourglass-shaped fluid pipe 1 can timely rotate the turntable 51 to accurately count; the upper surface of the turntable 51 is provided with a leakage net 6 with an inverted trapezoidal cross section; the impurities in the sewage are prevented from winding on the first shaft 52 through the leakage net 6; when the flowmeter is used, firstly, the flowmeter is connected with a pipeline through the left flange 2 and the right flange 3, and then, the counter 4 is installed in the fluid pipe 1 through the matching of nuts and bolts; when turbid sewage flows from right to left, the cross section of the fluid pipe 1 is hourglass-shaped, so that the pipe diameter of the fluid pipe 1 is gradually reduced and then gradually increased, when the sewage is positioned at the narrow part of the hourglass-shaped fluid pipe 1, the dynamic pressure reaches the maximum value, the static pressure reaches the minimum value, the speed of the sewage rises due to the change of the cross section area of the fluid pipe 1, and the rotating unit 5 is positioned on the left side of the narrow part of the hourglass-shaped fluid pipe 1, so that the rotating unit 5 can timely receive the flow speed to generate rotation counting; when the flabellum 53 drives the carousel 51 to rotate, can get rid of the impurity in the sewage to the outside, impurity in the sewage will move to the downhill path department of hourglass form fluid pipe 1, and receive the slope influence of this downhill path department, the velocity of flow of sewage is fast in the downward motion of impurity in the sewage, pressure is little, and this downhill path department is owing to be the back that the sewage flows, the velocity of flow of sewage in this department is slow, pressure is powerful, impurity in the sewage can be pushed to the left port of fluid pipe 1 naturally, reduce the accumulational risk of impurity in the sewage in fluid pipe 1, and reduce the rotation number of times that impurity influences flabellum 53 in the sewage, guarantee flabellum 53 pivoted flexibility, thereby improve the precision of this fluid meter count, and then improve the practicality of this flowmeter.

As a specific embodiment of the present invention, the turntable 51 is provided with an annular groove 511, and the annular groove 511 is located at the lower side of the fan blade 53; a group of cutting blocks 512 are arranged in the annular groove 511, and along with the rotation of the rotary disc 51, the cutting blocks 512 rotate in the annular groove 511 at a different speed, and the cutting surfaces of the cutting blocks 512 are positioned on one side far away from the rotary disc 51, so that impurities in sewage are prevented from being wound on the rotary disc 51; through setting up cutting block 512, flow along with sewage makes flabellum 53 drive carousel 51 take place to rotate, in the beginning, cutting block 512 is static for carousel 51, rotation through carousel 51, because inertial action, make cutting block 512 at the interior rotation of ring channel 511, and the slew velocity of cutting block 512 is less than carousel 51's slew velocity, utilize pivoted cutting block 512, cut the sewage impurity of probably winding on carousel 51, avoid the impurity winding in the sewage to influence the count precision of count table 4 in carousel 51, thereby the practicality of this flowmeter has been improved.

As a specific embodiment of the present invention, the lower surface of the turntable 51 is provided with a tapered table 54; the tip of the conical table 54 is positioned on the side far away from the lower surface of the rotating disc 51, and the outer surface of the conical table 54 is coated with gravel; by arranging the conical table 54, impurities in the sewage cut by the cutting block 512 flow to the middle part, and are all positioned on the back of the flowing sewage, so that the cut impurities are conveniently pushed to the left port of the fluid pipe 1; meanwhile, when the impurities in the sewage after cutting flow on the outer surface of the conical table 54, the gravel can further grind the impurities, so that the whole volume of the impurities is reduced, the impurities are more conveniently pushed to the port on the left side of the fluid pipe 1, the counting precision of the counting meter 4 is prevented from being influenced by the impurities, and the practicability of the flowmeter is improved.

As a specific embodiment of the present invention, the annular groove 511 is uniformly provided with arc-shaped protrusions 513; the arc-shaped surface of the arc-shaped projection 513 is positioned at one side close to the cutting block 512, the arc-shaped projection 513 is arranged in a first groove of the turntable 51 through a spring, the first groove is positioned at the lower side of the annular groove 511, and a steel wire rope 514 is arranged on the lower surface of the arc-shaped projection 513; the end part of the steel wire rope 514 extends out of the conical surface of the conical table 54 by one centimeter, and the steel wire rope 514 is not polished in production, so that burrs are remained; the arc-shaped convex block 513 is discontinuously extruded by the cutting block 512, so that the steel wire rope 514 is extended and retracted; through the arrangement, when the cutting block 512 rotates in the annular groove 511 and the cutting block 512 extrudes the arc-shaped convex block 513, the arc-shaped convex block 513 is extruded and moves to one side far away from the rotary disc 51, so that the steel wire rope 514 moves outwards, the contact area between the steel wire rope 514 and impurities in sewage is increased, the steel wire rope 514 with burrs is enabled to crush the impurities, and the overall volume of the impurities is further reduced; when the cutting block 512 does not press the arc-shaped projection 513, the arc-shaped projection 513 is reset under the action of the spring, so that the end of the wire rope 514 extends out to a distance of one centimeter from the conical surface of the conical table 54; through the stretching out and retracting back of the steel wire rope 514 that remains with the burr, make becoming less of impurity, it can not twine on carousel 51, influences the rotation of carousel 51 to influence the count precision of count table 4, thereby improved flowmeter's practicality.

As a specific embodiment of the present invention, a set of barbs 515 is uniformly arranged on the outer ring of the steel wire rope 514; the cross section of the barb 515 is fishhook-shaped, and the tip of the barb 515 in the fishhook shape is bent inwards; by arranging the barb 515, when the steel wire rope 514 moves to one side far away from the rotary table 51, the barb 515 in the conical table 54 extends out, impurities are cut into pieces by the barb 515, the steel wire rope 514 is arranged on the conical table 54, so that the steel wire rope 514 rotates along with the conical table 54, the barb 515 has larger cutting force through rotation, and the cutting effect of the barb 515 on the impurities is improved; simultaneously, barb 515 sets up to the fishhook-like, and the sharp portion incurve of fishhook shape barb 515 for the two sides of barb 515 all cuts impurity, and is unfavorable for impurity winding on barb 515, influences later stage barb 515 and cuts once more to impurity, thereby has improved the cutting efficiency to impurity, avoids producing the influence to the count of count table 4, thereby has improved the count precision of count table 4.

As a specific embodiment of the present invention, the distance between adjacent steel cables 514 along the tapered surface of the tapered platform 54 is two centimeters; through this kind of design for adjacent wire rope 514 is in the rotation, and barb 515 of installation on the wire rope 514 can contact each other to produce the interact, cut the impurity that probably twines on barb 515, avoid influencing the rotation of carousel 51 because the winding of impurity, thereby influence the count precision of count table 4, and then improved flowmeter's practicality.

When the flowmeter is used, firstly, the flowmeter is connected with a pipeline through the left flange 2 and the right flange 3, and then, the counter 4 is installed in the fluid pipe 1 through the matching of nuts and bolts; when turbid sewage flows from right to left, the cross section of the fluid pipe 1 is hourglass-shaped, so that the pipe diameter of the fluid pipe 1 is gradually reduced and then gradually increased, when the sewage is positioned at the narrow part of the hourglass-shaped fluid pipe 1, the dynamic pressure reaches the maximum value, the static pressure reaches the minimum value, the speed of the sewage rises due to the change of the cross section area of the fluid pipe 1, and the rotating unit 5 is positioned on the left side of the narrow part of the hourglass-shaped fluid pipe 1, so that the rotating unit 5 can timely receive the flow speed to generate rotation counting; when the fan blades 53 drive the rotating disc 51 to rotate, impurities in the sewage can be thrown to the outside, the impurities in the sewage move towards the downhill position of the hourglass-shaped fluid pipe 1 and are influenced by the gradient of the downhill position, the flow rate of the sewage is high and the pressure intensity is low when the impurities in the sewage move downwards, and the downhill position is the back side where the sewage flows, so that the flow rate of the sewage at the position is low and the pressure of the sewage is high, the impurities in the sewage can be naturally pushed to the port on the left side of the fluid pipe 1, the risk that the impurities in the sewage are accumulated in the fluid pipe 1 is reduced, the rotating frequency of the fan blades 53 influenced by the impurities in the sewage is reduced, and the rotating flexibility of the fan blades; the blades 53 drive the rotary disc 51 to rotate along with the flowing of the sewage, at the beginning, the cutting block 512 is static relative to the rotary disc 51, the cutting block 512 rotates in the annular groove 511 due to the inertia effect through the rotation of the rotary disc 51, the rotating speed of the cutting block 512 is less than that of the rotary disc 51, and the rotating cutting block 512 is utilized to cut the sewage impurities which may be wound on the rotary disc 51; meanwhile, impurities in the sewage cut by the cutting block 512 flow to the middle part through the conical table 54, so that the impurities are all positioned on the back of the flowing sewage, and the cut impurities are conveniently pushed to the left port of the fluid pipe 1; meanwhile, when the impurities in the sewage after cutting flow on the outer surface of the conical table 54, the gravel can further grind the impurities, so that the whole volume of the impurities is reduced, the impurities are more conveniently pushed to the port on the left side of the fluid pipe 1, the counting precision of the counting meter 4 is prevented from being influenced by the impurities, and the practicability of the flowmeter is improved.

The front, the back, the left, the right, the upper and the lower are all based on the figure 2 in the attached drawings of the specification, according to the standard of the observation angle of a person, the side of the device facing an observer is defined as the front, the left side of the observer is defined as the left, and the like.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the scope of the present invention.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.