CN210426719U - Float flowmeter verification platform - Google Patents

Abstract

The utility model belongs to the technical field of the discharge measurement of flowmeter, especially, relate to glass rotor or metal rotor flowmeter's float flowmeter examination platform. A collecting pipe water inlet of the float flowmeter verification platform is connected with a first collector through a front pipe section pneumatic ball valve, a test connecting pipe is arranged at the upper end of the collecting pipe, one end of a front metering straight pipe section of the test connecting pipe is connected with the collecting pipe, the other end of the front metering straight pipe section is connected with the lower end of the tested float flowmeter, the upper end of the tested float flowmeter is connected with the lower end of a rear metering straight pipe section, and the upper end of the rear metering straight pipe section is connected with a test pipeline. The utility model can meet the calibration work of float flowmeters with various specifications; and simple structure, convenient operation, the precision is high, and is with low costs.

Description

Float flowmeter verification platform

Technical Field

The utility model belongs to the technical field of the discharge measurement of flowmeter, especially, relate to glass rotor or metal rotor flow meter's float flowmeter examination platform.

Background

With the progress and development of society, in recent years, the accuracy and the requirement on a water flow sensor are higher and higher, particularly, the detection requirement on a glass rotor or a metal rotor flowmeter is greatly improved, and an efficient, high-accuracy and simple detection device is needed to realize the detection in the society.

The mounting table of the domestic general float flow verification system mostly uses a meter clamping device structure, the mounting precision requirement is high, the structure is complex and heavy, and the manufacturing cost is high; the installation to different specification meters wastes time and energy, has very big requirement to the space occupation of land moreover. The measuring accuracy is not high, the structure is complicated, the installation wastes time and labor, and the clamp and the tool are heavy and large in size.

Disclosure of Invention

Utility model purpose:

based on the prior art problem, the utility model provides a convenient to use, installation are simple, can satisfy the verification platform of multiple specification examined the table, have solved the problem that cost, installation accuracy require height.

The technical scheme is as follows:

the utility model discloses a realize through following technical scheme:

the float flowmeter verification platform is characterized in that a movable support frame is arranged on the collecting pipe; the upper end of the collecting pipe is respectively provided with three station fixing blocks with different pipe diameters, and the station fixing blocks are connected with one end of the test connecting pipe; the other end of the test connecting pipe is arranged on the upper end of the movable support frame; one end of a front metering straight pipe section of the test connecting pipe is communicated with the station fixing block, the other end of the front metering straight pipe section is communicated with the lower end of the tested float flowmeter, the upper end of the tested float flowmeter is communicated with the lower end of a rear metering straight pipe section, and the upper end of the rear metering straight pipe section is connected with the test pipeline.

The detachable section bar mounting frame is mounted on the platform frame at the lower end of the movable support frame, and the upper end of the section bar mounting frame is provided with a U-shaped limiting pipe clamp corresponding to the upper position and the lower position of the station fixing block.

And a convex connecting seat is arranged on the transverse connecting rod at the upper end of the profile mounting frame and is connected with the U-shaped limiting pipe clamp through a bolt.

The rectangular section frame of the section mounting frame is provided with a transverse connecting rod, and the transverse connecting rod is connected with the section frame through triangular angle iron.

The testing connecting pipe communicated with the collecting pipe is provided with three station fixing blocks with different pipe diameters according to pipe diameter specifications, a corresponding testing pipeline is selected according to the pipe diameter size of the tested float flowmeter, and the flange covers are mounted on the other two pipe diameters.

A collecting pipe water inlet of the float flowmeter verification platform is connected with the first collector through a front pipe section pneumatic ball valve, and the upper end of a rear metering straight pipe section of the float flowmeter verification platform is connected with a test pipeline.

The lower end of the collecting pipe is provided with a drainage ball valve.

The two ends of the collecting pipe are connected with the platform frame through U-shaped pipe clamps.

The advantages and effects are as follows:

the utility model has the advantages of as follows and beneficial effect:

the utility model can meet the calibration work of float flowmeters with various specifications; and simple structure, convenient operation, the precision is high, and is with low costs.

Drawings

FIG. 1 is a perspective schematic view of a float flow meter verification station;

FIG. 2 is a schematic diagram of a float flow meter verification station;

FIG. 3 is a schematic diagram of a float flow meter verification system;

fig. 4 is a schematic diagram of a float flow meter verification system assembly configuration.

Description of reference numerals:

1. a circulating voltage stabilizing system; 2. a test tube segment assembly; 3. a standard table; 4. a standard metering system; 5. a water tank; 6. a water return pipe; 7. a control cabinet; 11. a reducing shock-absorbing joint; 12. a water pump; 13. a check valve; 14. a surge tank; 15. a rubber flexible joint pipe; 21. a float flowmeter verification platform; 22. a first junction station; 23. a front pipe section pneumatic ball valve; 24. a second junction station; 25. a measured quantity; 26. a meter clamping device; 27. a rear pipe section pneumatic ball valve; 210. moving the support frame; 2101. a U-shaped limiting pipe clamp; 2102. a platform frame; 2103. a section bar mounting frame; 2104. a transverse connecting rod; 2105 triangular angle iron; 211. a rear metering straight pipe section; 212. a gasket; 213. a measured float flow meter; 214. a front metering straight pipe section; 215. a station fixing block; 216. a collector pipe; 217. a U-shaped pipe clamp; 218. a drain ball valve; 219. a flange cover; 31. a standard flow sensor; 41. a third junction station; 42. a commutator; 43. an electronic scale.

Detailed Description

The utility model is used for according to standard requirements such as JJG 164 supple materials 2000 "liquid flow standard device examination regulation", JJG643-2003 "standard tabular method flow standard device", GB/T17613.1-1998 "measure the test procedure part 1 static weighing system of the liquid flow device in the closed pipeline with the weighing method", GB/T17612-1998 "the measurement weighing method of liquid flow in the closed pipeline", JJJG 257 supple materials 2007 float flowmeter examination regulation ", be applicable to the float flowmeters such as glass rotor or metal rotor examination platform.

As shown in fig. 1 and 2, the float flowmeter verification station, the mobile support frame 210 is mounted on the manifold 216; the upper end of the collecting pipe is respectively provided with three station fixing blocks 215 with different pipe diameters, and the station fixing blocks 215 are connected with one end of the test connecting pipe; the other end of the test connection pipe is mounted on the upper end of the movable support frame 210; one end of a front metering straight pipe section 214 of the test connecting pipe is communicated with the station fixing block 215, the other end of the front metering straight pipe section 214 is communicated with the lower end of a tested floater flowmeter 213, the upper end of the tested floater flowmeter 213 is communicated with the lower end of a rear metering straight pipe section 211, and the upper end of the rear metering straight pipe section 211 is connected with the test pipeline.

Different pipe diameters of the station fixing blocks 215 communicated with the collecting pipe 216 correspond to three testing pipelines in the figure 3, namely the pipe diameters DN4/6/10/15, DN20/25/35/40 and DN50/60/80 can be tested, and the verification of float flowmeters with various specifications can be met. A detachable section bar mounting frame 2103 is arranged on a platform frame 2102 at the lower end of the movable support frame 210, and a U-shaped limiting pipe clamp 2101 corresponding to the upper position and the lower position of the station fixing block 215 is arranged at the upper end of the section bar mounting frame 2103.

Movable caster wheels with brakes are mounted at the bottoms of four support columns of the platform frame 2102 to realize movement and positioning, and the float flowmeter verification platform can be directly moved to other positions when not used.

A convex connecting seat is arranged on the transverse connecting rod 2104 at the upper end of the section bar mounting frame 2103, and the convex connecting seat is connected with the U-shaped limiting pipe clamp 2101 through a bolt.

A transverse connecting rod 2104 is arranged on the rectangular section frame of the section mounting frame 2103, and the transverse connecting rod 2104 is connected with the section frame through a triangular angle iron 2015.

The triangular angle iron is as shown in fig. 1, two right-angle sides of the triangular angle iron of the triangular structure are provided with bolt holes, and the transverse connecting rod 2104 is connected with the vertical section frames on two sides through bolts or screws. The height of the transverse connecting rod 2104 in the profile frame can be adjusted according to the length of the test pipeline, the straight pipe section 211 is conveniently measured after being limited through the U-shaped limiting pipe clamp 2101, the whole test pipeline is stabilized, and the vibration is prevented from affecting the test precision.

The test connecting pipe communicated with the collecting pipe 216 is provided with three station fixing blocks 215 with different pipe diameters according to the pipe diameter specification, a corresponding test pipeline is selected according to the pipe diameter size of the tested float flowmeter 213, and the other two pipe diameters are provided with flange covers 219. The flange cover 219 is used to block the two station fixing blocks 215 that are not used.

The movable support frame 210 and the collecting pipe of the float flowmeter verification platform 21 have simple structures, small occupied area and low cost; the movable support frame is of a high-quality stainless steel square tube welding structure, the cost is low, and movable casters with brakes are mounted at the bottom of the movable support frame to realize movement and positioning. The collecting pipe 216 is fixed on the movable support frame through the U-shaped pipe clamp 217 and an M8X30 socket head cap screw, and is convenient to disassemble.

The section bar mounting bracket that portable support frame upper portion adopted, section bar mounting bracket and portable support frame lower extreme platform frame attach, and the section bar mounting bracket adopts aluminium alloy construction to assemble, simple to operate, and simple structure can carry out not co-altitude's regulation according to the needs when being surveyed float flowmeter installation, just also assembles the change that realizes the height through many aluminium alloy constructions, assembles the form for current common aluminium alloy construction. Therefore, the sectional material mounting frame can meet the requirements of front and rear straight pipe sections with different specifications and lengths.

Because the float flowmeter is in a vertical measurement mode, and the measuring pipeline is in a lying structure, the float flowmeter verification platform is additionally arranged to verify the float flowmeter, and various different flowmeters can be tested. As shown in fig. 3, the float flowmeter verification platform 21 is divided into three stations according to different pipe diameter specifications, wherein for the float flowmeters to be detected with different pipe diameters, the front metering straight pipe section and the rear metering straight pipe section with different pipe diameters are selected to complete metering, and the installation is convenient.

The water inlet of a collecting pipe 216 of the float flowmeter verification platform 21 is connected with the first collector 22 through a front pipe section pneumatic ball valve 23, and the upper end of a rear metering straight pipe section of the float flowmeter verification platform 21 is connected with a test pipeline.

The lower end of the manifold 216 is provided with a drain ball valve 218. The drainage ball valve is an existing drainage ball valve product.

The manifold 216 is connected at both ends to a platform frame 2102 by a U-shaped pipe clamp 217.

The lengths of the front metering straight pipe section and the rear metering straight pipe section can be respectively 10D and 5D, the precision requirement is met, and the pipe diameters of different specifications are met.

The test connecting pipe communicated with the collecting pipe 216 is provided with three different sizes according to the pipe diameter specification, the sizes are selected according to the pipe diameter size of the tested float flowmeter 213, and the other two pipe diameters are provided with flange covers 219.

The float flowmeter verification platform can only measure a station flowmeter at a time, so that the flange cover and the sealing gasket are connected, sealed and fastened through fixing bolts in other two stations during measurement. No additional ball valve is needed, the installation and the sealing are simple, and the operation is convenient. When the float flowmeter is verified, the measuring pipeline is connected, any branch of the measuring pipeline is opened, but the verification of other meters is not performed, and only the communication function of the pipeline is realized.

The lower end of the manifold 216 is provided with a drain ball valve 218. After the metering is finished, water can be drained through the drainage ball valve 218 due to water stored in the pipeline, and the operation is simple.

The left end and the right end of the collecting pipe 216 are fixed on the movable support frame 210 through U-shaped pipe clamps 217.

The U-shaped pipe clamp 217 fixes the collecting pipe 216 on a platform frame of the movable support frame, so that the stability of the collecting pipe 216 is ensured.

As shown in fig. 3 and 4, in the flowmeter verification system, a water tank 5, a circulating pressure stabilizing system 1, a test pipe section assembly 2, a standard meter 3 and a standard metering system 4 of the verification system are connected in sequence; the water outlet of the water tank 5 is connected with the water inlet of the circulating pressure stabilizing system 1, and the water inlet of the circulating pressure stabilizing system 1 is sequentially connected with a reducing shock-absorbing joint 11, a water pump 12, a check valve 13 and a pressure stabilizing tank 14; the pressure stabilizing tank 14 is connected with the front end of a first junction station 22 of the test pipe section assembly 2 through a rubber flexible connecting pipe 15; the rear end of the first confluence device 22 is respectively connected with a plurality of test pipelines in parallel, and the front end and the rear end of each test pipeline are respectively connected with the rear end of the first confluence device 22 and the front end of the second confluence device 24 through a front pipe section pneumatic ball valve 23; the rear end of the second junction station 24 is connected with the front end of the standard meter 3, and the rear end of the standard meter 3 is connected with the water inlet of the water tank 5.

The water tank is 10m³A volumetric water storage tank. The water outlet of the water tank is provided with a filter, the water outlet of the filter is connected with a circulating pressure stabilizing system, the filter is arranged to reduce impurities in water and prevent subsequent influence on the accuracy of flow verification, and the filter is an existing filter. The outlet of the filter can adopt a DN200 caliber pipeline, and a stainless steel net with 100 meshes is arranged at the outlet pipe.

The floor space is small, the structure is compact, and the floor space of the whole system is only about 6 meters by 5 meters.

As shown in fig. 3, the first junction station 22 is provided with two pressure gauges at different positions, and the second junction station 24 is provided with thermometers and pressure gauges at two ends; the third flow combiner 41 is provided with an electric exhaust valve for exhausting the gas in the pipe. The thermometer and the pressure gauge are the existing thermometer and pressure gauge.

Meanwhile, in order to facilitate control, a control cabinet 7 can be additionally arranged, a computer is arranged in the control cabinet and is connected with a commutator, an electronic scale, a standard flow sensor, a pneumatic ball valve, a water pump and the like, and the control cabinet and all devices are connected in the prior art.

Wherein the water pump adopts the prior art, such as the existing Shanghai Kaiquan pump KQL 125/235-45/2; the junction station adopts the prior art, for example, the junction station can adopt DN150 stainless steel pipe welding to connect 15/40/80 flanges and pipelines as required; the pressure stabilizing tank adopts the prior art, such as a WYQ-3 type stainless steel pressure stabilizing tank of the Dandong eosin light measuring instrument factory, and a pressure sensor is also arranged on the pressure stabilizing tank. The rubber flexible connecting pipe adopts the prior art, such as the XGD type rubber flexible connecting pipe which is ring-shaped. The reducer shock-absorbing coupling is also an existing product, such as the reducer shock-absorbing coupling for the water heating of holy. Existing products for diverters, electronic scales, standard flow sensors, electrically-actuated regulator valves, pneumatic ball valves, etc. are also available, for example diverters may be used in the QHX series QHX-25 or QHX-80 of dawn. The electronic scale adopts a medium-precision electronic platform scale with more Mettlerlito; the PBD655-BC300 type medium precision electronic platform scale has the measuring range of 300kg, the precision of 1/6000, the carbon steel material and the scale pan of 500 x 600; model PN3-1010 medium precision electronic platform scale, range 3T, 1/6000 precision, carbon steel, scale pan 800 x 800. A standard flow sensor may be used as a secondary verification, for example, a coriolis flowmeter, model OPTIFLUX 4300C. The pneumatic ball valve can adopt ZMA series of Shanghai-Zhongmei self-control valves or 220VQ641F-16P stainless steel flange pneumatic ball valve of Changzhouxuanyu.

The flowmeter verification system has high verification accuracy, very simple structure and convenient operation, simultaneously adopts different pipelines to detect different flowmeters to improve the precision, can detect different flowmeters in one system, and saves the equipment cost.

As shown in fig. 3, the plurality of test lines of the test tube segment assembly 2 are connected in parallel with the float flowmeter verification station 21; the test pipeline comprises a meter clamping device 26 and a rear pipe section pneumatic ball valve 27; the front pipe section of the test pipeline is connected with a meter 25 and a pneumatic ball valve 27 at the rear pipe section of a meter clamping device 26 in sequence. In the case of using the test line, the meter 25 is attached to the test line, and the front and rear pipes are directly connected to each other without using the test line.

As shown in fig. 3, more than two test pipelines can be arranged, and three test pipelines are the most economical and have the smallest occupied area through tests. Each meter clamping device is arranged on each testing pipeline and is connected with the rear pipe section at the rear end of the measured device, the meter clamping devices can stretch out and draw back for a certain length to adjust the actual length of the measured device, and the measured device can be fixedly clamped.

The measured meter can be an electromagnetic flow meter, a turbine flow meter, a mass flow meter and other water flow sensors, but the float flow meter cannot be verified, so that a float flow meter verification platform is independently arranged for verifying the float flow meter, the front end and the rear end of the measured meter are a front pipe section and a rear pipe section, and the front pipe section and the rear pipe section are straight pipe sections with guaranteed lengths in front and rear of the measured meter.

In addition, the meter clamping device is the prior art, and the meter clamping device can adopt JBQ type pneumatic telescopic meter clamping devices of Dandongfei fibrate, such as tube diameters of JBQ-15, 40 and 80, namely DN15, 40 and 80.

The standard table 3 includes an electric ball valve and a standard flow sensor 31; the rear end of the second flow combiner 24 is connected with a plurality of standard flow sensors 31 in parallel, the front ends of the standard flow sensors 31 are connected with the rear end of the second flow combiner 24 through electric ball valves, and the rear ends of the standard flow sensors 31 are connected with a third flow combiner 41 of the standard metering system 4.

The electric ball valve is the prior art, for example, the electric ball valve can adopt a self-controlled VQ947F-16P or 17P type stainless steel V-shaped electric adjusting ball valve in Shanghai and China.

The standard metering system 4 comprises a third flow combiner 41, a commutator 42 and an electronic scale 43; the front end of the third confluence device 41 is connected with the rear end of the standard meter 3, the rear end of the third confluence device 41 is respectively connected with the water inlets of the parallel commutators 42, the first water outlets of the commutators 42 are connected with the weighing water tanks of the electronic scales 43, and the second water outlets of the commutators 42 are connected with the water inlets of the water tanks 5 through the water return pipes 6.

The commutator is provided with two water outlets, one water outlet is connected with the water inlet of the weighing water tank, and the other water outlet is directly connected with the water return pipe. Before metering, the weight is not weighed, therefore, the water return pipe is directly connected through the reverser, the water flow returns to the water tank, during metering, the reverser is connected with the water inlet of the weighing water tank, timing is carried out simultaneously, and the water return pipe is reconnected after reversing is carried out after the set timing time.

As shown in figure 3, the standard metering system is provided with two parallel branches, one of which is provided with an electronic scale weighing range of 300kg, and the other is provided with a 2T weighing range, and by adopting the two parallel branches, different branches are selected according to different measured flowmeters during actual measurement, so that the precision is further improved.

The weighing water tank arranged on the electronic scale is provided with a drain valve and a water inlet, and the weighing water tanks with different volumes are arranged according to the weighing range of the electronic scale. The electronic scale is provided with a timing meter for timing, so that an operator can conveniently control the mass of water within a specified time.

The method of operation of the flow meter verification system:

different pipelines, front straight pipe sections and rear straight pipe sections are selected according to different detected flowmeters, a float flowmeter verification table is selected for testing float flowmeter timing, and testing pipelines are adopted for testing electromagnetic flowmeters, turbine flowmeters, mass flowmeters and the like. As shown in FIG. 3, the uppermost test pipeline is used for testing the pipe diameter DN 40/32/25/20; a middle test pipeline is adopted when the pipe diameter DN15/10/6/4 is tested; the lowest test pipeline is adopted when the pipe diameter DN80/65/50 is tested.

The meter is mounted on an appropriate test line or certification bench to ensure no leakage. When the device works, water in the water tank 5 is pumped into the pressure stabilizing tank 14 under the action of the water pump 12, and enters the test pipe section assembly 2 after high-frequency pulsation is eliminated through the pressure stabilizing tank 14.

Adopting a test pipeline: and opening the corresponding front pipe section pneumatic ball valve 23, enabling water to flow out of the test pipeline through the front straight pipe section of the flowmeter, the measured meter 25, the rear straight pipe section, the meter clamping device 26 and the rear pipe section pneumatic ball valve 27, and measuring the flow through a standard meter or a weighing method.

Using a test float flowmeter: opening the corresponding front-pipe-section pneumatic ball valve 23, and enabling water to pass through a collecting pipe 216, a communicated station fixing block 215, a front metering straight pipe section 214, a tested floater flowmeter 213, a rear metering straight pipe section 211 and a testing pipeline; and measuring the flow by a standard meter or a weighing method.

The standard meter is used for reference flow comparison or low-precision sensor measurement, and is visual and simple;

the weighing method is to test whether the commutator can directly flow back to the water tank before metering, and switch the commutator after the flow is stable, so that the water flows to the weighing water tank of the corresponding electronic scale, and the water tank is automatically switched after the weighing is started and the time is up. And calculating the flow rate according to the weight difference of the water tank corresponding to the weighing corresponding time of the electronic scale.

In order to ensure the accuracy of the measurement, 3-6 repeated measurements are generally carried out.

Claims (8)

1. Float flowmeter examination platform, its characterized in that: the movable support frame (210) is arranged on the collecting pipe (216); the upper end of the collecting pipe is respectively provided with three station fixing blocks (215) with different pipe diameters, and the station fixing blocks (215) are connected with one end of the test connecting pipe; the other end of the test connecting pipe is arranged on the upper end of the movable support frame (210); one end of a front metering straight pipe section (214) of the test connecting pipe is communicated with the station fixing block (215), the other end of the front metering straight pipe section (214) is communicated with the lower end of a tested floater flow meter (213), the upper end of the tested floater flow meter (213) is communicated with the lower end of a rear metering straight pipe section (211), and the upper end of the rear metering straight pipe section (211) is connected with the test pipeline.

2. The float flowmeter verification station of claim 1, wherein: a detachable section bar mounting rack (2103) is mounted on a platform frame (2102) at the lower end of the movable support frame (210), and a U-shaped limiting pipe clamp (2101) corresponding to the upper and lower positions of the station fixing block (215) is arranged at the upper end of the section bar mounting rack (2103).

3. The float flowmeter verification station of claim 2, wherein: a convex connecting seat is arranged on the upper end transverse connecting rod (2104) of the section bar mounting frame (2103), and the convex connecting seat is connected with the U-shaped limiting pipe clamp (2101) through a bolt.

4. The float flowmeter verification station of claim 2 or 3, wherein: a transverse connecting rod (2104) is arranged on a rectangular profile frame of the profile mounting frame (2103), and the transverse connecting rod (2104) is connected with the profile frame through a triangular angle iron (2015).

5. The float flowmeter verification station of claim 1, wherein: the testing connecting pipe communicated with the collecting pipe (216) is provided with three station fixing blocks (215) with different pipe diameters according to pipe diameter specifications, a corresponding testing pipeline is selected according to the pipe diameter size of the tested float flowmeter (213), and flange covers (219) are mounted on the other two pipe diameters.

6. The float flowmeter verification station of claim 1, wherein: a water inlet of a collecting pipe (216) of the float flowmeter verification platform (21) is connected with a first collector (22) through a front pipe section pneumatic ball valve (23), and the upper end of a rear metering straight pipe section of the float flowmeter verification platform (21) is connected with a test pipeline.

7. The float flowmeter verification station of claim 1, wherein: the lower end of the collecting pipe (216) is provided with a drain ball valve (218).

8. The float flowmeter verification station of claim 1, wherein: the two ends of the manifold (216) are connected to the platform frame (2102) by U-shaped pipe clamps (217).

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