Pulsating differential pressure flowmeter

Abstract

The utility model relates to a pulsating differential pressure flowmeter, which belongs to the technical field of flow measuring devices, and comprises a base and a pipe body detachably connected with the base, a generating body is arranged in the pipe body, the generating body comprises a generating body bottom plate and a generating body main body arranged on the generating body bottom plate, and the generating body main body is arranged on the generating body bottom plate. A first through hole and a second through hole are formed in the generating body bottom plate, and a first communicating hole communicated with the first through hole and a second communicating hole communicated with the second through hole are formed in the base. The generating body is arranged in the pipe body, vortexes can be generated when fluid passes through the generating body in the pipe body, the distance between the vortexes corresponds to the specific volume of the fluid, the number of the vortexes can be measured through the sensor, and the volume flow is obtained after conversion; the generating body is arranged to be in a T shape, the lift coefficient of the generating body reaches 10 times of the resistance coefficient, vortexes generated by the generating body are stronger than those generated by an existing generating body, and in a wide Reynolds number range, vortex street signals are high in stability and good in linearity.

Description

TECHNICAL FIELD

[0001] The utility model relates to flow measuring device technical field especially relates to a pulsating differential pressure flowmeter. BACKGROUND

[0002] In prior art, the vortex of vortex flowmeter is through the spin in, and the vortex generator is arranged at the fluid inlet, and the vortex flowmeter is currently widely used in the measurement of various gas flow in petroleum, chemical industry, electric power, metallurgy, city gas supply and other industries, has the advantages of strong function, wide flow range, simple operation and maintenance, convenient installation and use, its main working principle is to use the spin vortex precession phenomenon to measure the flow, wherein the spin vortex precession frequency is proportional to the flow of fluid. SUMMARY

[0003] In order to overcome the above-mentioned defects of prior art, the utility model provides a pulsating differential pressure flowmeter to solve the problems in the background art.

[0004] In order to realize the above-mentioned utility model purposes, the utility model provides a pulsating differential pressure flowmeter, the flowmeter includes a base, a pipe body which is detachably connected with the base, the inside of the pipe body is provided with a generator, the generator includes a generator bottom plate and a generator body which is arranged on the generator bottom plate, the generator bottom plate is provided with a first through hole and a second through hole, the base is provided with a first communication hole which is communicated with the first through hole and a second communication hole which is communicated with the second through hole.

[0005] Further, the first through hole and the second through hole are symmetrically arranged about the generator body, the top of the generator body is provided with a generator top plate, the generator body is provided with two left-right symmetrical generator grooves, the first through hole and the second through hole are respectively located below the two generator grooves.

[0006] Further, the pipe body includes a mounting groove and a mounting through groove, the generator top plate is mounted in cooperation with the mounting groove, and the generator bottom plate is mounted in cooperation with the mounting through groove.

[0007] Further, the pipe body further includes a plurality of mounting threaded holes, the plurality of mounting threaded holes and the mounting through groove are arranged on the same side, the base includes an upper support plate, the upper support plate is provided with a plurality of mounting through holes, and the mounting through holes and the mounting threaded holes are one-to-one corresponding through bolt connection.

[0008] Further, the base further comprises a lower support plate, the lower support plate is arranged below the upper support plate, the upper support plate and the lower support plate are connected through a connecting plate, the first communication hole and the second communication hole sequentially pass through the upper support plate, the connecting plate and the lower support plate.

[0009] Further, the lower support plate is provided with a plurality of lower mounting holes for the entire flowmeter.

[0010] Further, the upper support plate is provided with a first circular groove and a second circular groove, the first circular groove communicates the first communication hole and the first through hole, the second circular groove communicates the second communication hole and the second through hole, the diameter of the first circular groove is greater than the first communication hole and the first through hole, and the diameter of the second circular groove is greater than the second communication hole and the second through hole.

[0011] Compared with the prior art, the utility model has the advantages that:

[0012] By setting the generating body in the pipe body, the vortex can be generated when the fluid passes through the generating body in the pipe body, the distance between the vortex corresponds to the specific volume of the fluid, and the number of vortexes can be measured by the sensor, and the volume flow is obtained after conversion;

[0013] By setting the generating body as T-shaped, the lift coefficient thereof can reach 10 times of the drag coefficient, the vortex generated thereby is more intense than that of the existing generating body, the stability of the vortex street signal is high and the linearity is good in a wide Reynolds number range, the T-shaped generating body is adopted in the stress flowmeter, the lower limit speed in water test is 0.3m / s, and the lower limit speed in the normal pressure air flow standard device test can be reduced to 3.5-4m / s. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a three-dimensional structure schematic view of the utility model embodiment;

[0015] Figure 2 It is another three-dimensional structure schematic view of the utility model embodiment;

[0016] Figure 3 It is a sectional structure schematic view of the utility model embodiment;

[0017] Figure 4 It is another sectional structure schematic view of the utility model embodiment;

[0018] Figure 5 It is an enlarged three-dimensional structure schematic view of the generating body of the utility model;

[0019] Figure 6 It is an enlarged front view structure schematic view of the generating body of the utility model;

[0020] Figure 7 It is the enlarged stereogram structure schematic view of the base of the utility model;

[0021] Figure 8 It is the enlarged stereogram structure schematic view of the pipe body of the utility model. DETAILED DESCRIPTION

[0022] To make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in conjunction with the drawings of the utility model below. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. The embodiments of the utility model will be described in conjunction with the drawings below.

[0023] Reference Figures 1-8 A pulsating differential pressure flowmeter comprises a base 3, a pipe body 1 detachably connected with the base 3, an occurrence body 2 arranged in the pipe body 1, the occurrence body 2 comprising an occurrence body bottom plate 13 and an occurrence body body 18 arranged on the occurrence body bottom plate 13, the occurrence body bottom plate 13 being provided with a first through hole 6 and a second through hole 7, the base 3 being provided with a first communication hole 4 in communication with the first through hole 6 and a second communication hole 5 in communication with the second through hole 7;

[0024] The base 3 and the pipe body 1 are connected through bolts, the occurrence body 2 is used for generating vortexes, the distance between the vortexes corresponds to a specific volume of fluid, the number of vortexes and the frequency of vortex generation can be measured by a sensor, the volume flow rate is obtained after conversion, the higher the flow rate of the fluid through the pipe body 1, the faster the vortex generation frequency, that is, the greater the flow rate, and vice versa;

[0025] The first through hole 6 and the second through hole 7 are channels for transmitting pressure of gas or liquid, the vortexes have pressure, the pressure is transmitted, the left and right first through holes 6 and the second through holes 7 alternately press upward, the vortexes are also arranged one by one from left to right, the pressure is transmitted to a piezoelectric crystal, electric charges are generated, and a wave pattern is displayed on a screen, so that frequency data can be obtained;

[0026] The first through hole 6 and the second through hole 7 are symmetrically arranged about the occurrence body body 18, the top of the occurrence body body 18 is provided with an occurrence body top plate 12, the occurrence body body 18 is provided with two left and right symmetric occurrence body grooves 14, the first through hole 6 and the second through hole 7 are respectively located below the two occurrence body grooves 14, the two occurrence body grooves 14 are used for generating vortexes, the occurrence body 1 further comprises a back plate 22 and a front plate 23, the front plate 23 is vertically arranged with the back plate 22, the front end of the front plate 23 is further provided with two symmetrically arranged inclined surfaces 24, the occurrence body groove 14 is arranged between the front plate 23 and the back plate 22, the bottom of the occurrence body groove 14 is lower than the front plate 23, and the groove is formed to facilitate the generation of vortexes;

[0027] The pipe body 1 comprises a mounting groove 15 and a mounting through groove 16, the generator top plate 12 is mounted in cooperation with the mounting groove 15, and the generator bottom plate 13 is mounted in cooperation with the mounting through groove 16, that is, the generator 2 can be disassembled and mounted, when mounted, the generator top plate 12 is mounted in cooperation with the mounting groove 15 through the mounting through groove 16, after cooperation in place, the generator bottom plate 13 can be cooperated with the mounting through groove 16, then the four mounting through holes 11 are aligned with the four mounting threaded holes 17 one by one, and the connection can be completed by screwing in the bolts;

[0028] The pipe body 1 further comprises four mounting threaded holes 17, the mounting threaded holes 17 are arranged on the same side as the mounting through groove 16, the base 3 comprises an upper supporting plate 19, the upper supporting plate 19 is provided with a plurality of mounting through holes 11, the mounting through holes 11 correspond to the mounting threaded holes 17 in position and are connected by bolts, the connection is achieved by bolts, and the disassembly and assembly are relatively convenient, so that the generator 2 can be conveniently replaced;

[0029] The base 3 further comprises a lower supporting plate 20, the lower supporting plate 20 is arranged below the upper supporting plate 19, the upper supporting plate 19 and the lower supporting plate 20 are connected by a connecting plate 21, and the first communication hole 4 and the second communication hole 5 both pass through the upper supporting plate 19, the connecting plate 21 and the lower supporting plate 20 in sequence;

[0030] The lower supporting plate 20 is provided with a plurality of lower mounting holes 10 for the entire flowmeter, which are used for fixing the position of the flowmeter;

[0031] The upper supporting plate 19 is provided with a first circular groove 8 and a second circular groove 9, the first circular groove 8 communicates the first communication hole 4 and the first through hole 6, and the second circular groove 9 communicates the second communication hole 5 and the second through hole 7, the diameter of the first circular groove 8 is greater than that of the first communication hole 4 and the first through hole 6, and the diameter of the second circular groove 9 is greater than that of the second communication hole 5 and the second through hole 7, the upper supporting plate 19 is connected with the pipe body 1, by arranging the first circular groove 8 and the second circular groove 9 with relatively large diameters, the complete communication of the first communication hole 4 with the first through hole 6 and the complete connection of the second communication hole 5 with the second through hole 7 can be ensured during the connection process;

[0032] By arranging the generator 2 in the pipe body 1, the vortex can be generated when the fluid passes through the generator 2 in the pipe body 1, the distance between the vortices corresponds to a specific volume of the fluid, the number of the vortices can be measured by using a sensor, and the volume flow rate can be obtained after conversion;

[0033] By arranging the generator 1 as a T shape, the lift coefficient thereof can reach 10 times of the drag coefficient, the vortex generated thereby is more intense than that of the existing generator, the stability of the vortex street signal is high and the linearity is also good in a relatively wide Reynolds number range, the T-shaped generator is adopted in the stress flowmeter, and the lower limit speed in the water test can reach 0.3 m / s, and the lower limit speed in the test of the normal pressure air flow standard device can also be reduced to 3.5-4 m / s.

[0034] The technical solutions of the utility model are described above in combination with specific embodiments, but it should be noted that the above description is only for explaining the solutions of the utility model and cannot be interpreted as a specific limitation on the protection scope of the utility model in any way. Based on the explanation herein, other specific embodiments or equivalent substitutions of the utility model that can be thought of by those skilled in the art without creative labor will all fall within the protection scope of the utility model.

Claims

1. A pulsating differential pressure flow meter, characterized in that, The flow meter includes a base (3) and a tube (1) detachably connected to the base (3). The tube (1) is provided with a generator (2). The generator (2) includes a generator base plate (13) and a generator body (18) disposed on the generator base plate (13). The generator base plate (13) is provided with a first through hole (6) and a second through hole (7). The base (3) is provided with a first connecting hole (4) communicating with the first through hole (6) and a second connecting hole (5) communicating with the second through hole (7).

2. The pulsating differential pressure flow meter according to claim 1, characterized in that, The first through hole (6) and the second through hole (7) are symmetrically arranged about the generator body (18). The generator body (18) has a generator top plate (12) on its top. The generator body (18) has two left-right symmetrical generator grooves (14). The first through hole (6) and the second through hole (7) are respectively located below the two generator grooves (14).

3. The pulsating differential pressure flow meter according to claim 2, characterized in that, The tube body (1) includes an installation groove (15) and an installation through groove (16). The top plate (12) of the generator is installed in conjunction with the installation groove (15), and the bottom plate (13) of the generator is installed in conjunction with the installation through groove (16).

4. The pulsating differential pressure flow meter according to claim 3, characterized in that, The tube body (1) also includes a plurality of mounting threaded holes (17), which are disposed on the same side as the mounting through groove (16). The base (3) includes an upper support plate (19), which is provided with a plurality of mounting through holes (11). The positions of the mounting through holes (11) and the mounting threaded holes (17) correspond one-to-one and are connected by bolts.

5. A pulsating differential pressure flow meter according to claim 4, characterized in that, The base (3) also includes a lower support plate (20), which is located below the upper support plate (19). The upper support plate (19) and the lower support plate (20) are connected by a connecting plate (21). The first connecting hole (4) and the second connecting hole (5) pass through the upper support plate (19), the connecting plate (21), and the lower support plate (20) in sequence.

6. A pulsating differential pressure flow meter according to claim 5, characterized in that, The lower support plate (20) is provided with several lower mounting holes (10) for the entire flow meter.

7. A pulsating differential pressure flow meter according to claim 5, characterized in that, The upper support plate (19) is provided with a first circular groove (8) and a second circular groove (9). The first circular groove (8) connects the first connecting hole (4) and the first through hole (6). The second circular groove (9) connects the second connecting hole (5) and the second through hole (7). The diameter of the first circular groove (8) is larger than that of the first connecting hole (4) and the first through hole (6). The diameter of the second circular groove (9) is larger than that of the second connecting hole (5) and the second through hole (7).

Images