CN113049067A - Liquid flowmeter detection device - Google Patents
Liquid flowmeter detection device Download PDFInfo
- Publication number
- CN113049067A CN113049067A CN202110261234.1A CN202110261234A CN113049067A CN 113049067 A CN113049067 A CN 113049067A CN 202110261234 A CN202110261234 A CN 202110261234A CN 113049067 A CN113049067 A CN 113049067A
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- 238000001514 detection method Methods 0.000 title claims abstract description 32
- 239000007788 liquid Substances 0.000 title claims abstract description 11
- 239000003638 chemical reducing agent Substances 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
- G01F25/10—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention discloses a liquid flowmeter detection device, which comprises a workbench, a front straight pipe section, a rear straight pipe section and a detection section, wherein the workbench is provided with a front straight pipe section and a rear straight pipe section; the workbench is provided with a front support and a rear support, and a sliding chute and a guide rod are arranged between the front support and the rear support; the front straight pipe section is slidably arranged on the front support, and a first driving mechanism for driving the front straight pipe section to move back and forth is further arranged on the front support; the rear straight pipe section is fixed on the front support, and a standard flowmeter is connected in series on the rear straight pipe section; the detection section comprises a plurality of detected flowmeters and rectifying joints spaced among the detected flowmeters, the detected flowmeters and the rectifying joints are supported on the sliding grooves, first connecting plates are symmetrically arranged on the left side and the right side of a flange of each rectifying joint, each guide rod penetrates through a first guide hole in the first connecting plate on the corresponding side, and a pressure spring sleeved on each guide rod is supported between every two adjacent front and back first connecting plates. The invention can detect a plurality of flowmeters at one time and can adapt to the detection of flowmeters with different lengths.
Description
Technical Field
The invention relates to the technical field of measurement instrument detection, in particular to a liquid flowmeter detection device.
Background
The calibration and calibration of the flowmeter are carried out according to the calibration regulations of various flowmeters issued by the national bureau of metrology, the currently applied flowmeters are almost calibrated when leaving a factory except for the standard throttling device without experimental calibration, and the calibration is also carried out frequently in the use process of the flowmeters.
For example, chinese patent CN211042422U discloses a flow meter detection device, which can only detect one flow meter at a time, and has low efficiency, and chinese patent CN209979033U discloses an efficient gas flow standard device capable of detecting multiple flow meters simultaneously, which can detect multiple flow meters at a time, but the position of the rectifying joint between the detected flow meters is fixed, and the device cannot adapt to the detection of flow meters with different lengths.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a liquid flowmeter detection device, so that a plurality of flowmeters can be detected at one time, and the detection device can be suitable for the detection of flowmeters with different lengths.
The invention provides a liquid flowmeter detection device, comprising: the front support and the rear support are oppositely arranged on the workbench in the front and back direction, a sliding groove extending in the front and back direction is arranged between the front support and the rear support on the workbench, and two guide rods parallel to the sliding groove are arranged on two sides of the sliding groove between the front support and the rear support; the front straight pipe section penetrates through the front support and can slide back and forth relative to the front support, a first driving mechanism for driving the front straight pipe section to move back and forth is further mounted on the front support, and a flange plate is arranged at the rear end of the front straight pipe section; the rear straight pipe section is fixed on the front support, is coaxial with the front straight pipe section, and is connected with a standard flowmeter in series; the detection section comprises a plurality of detected flowmeters and rectifying joints spaced among the detected flowmeters, flange plates are arranged at two ends of each detected flowmeter and rectifying joint, each detected flowmeter and rectifying joint are supported on the sliding groove and are coaxial with the front straight pipe section and the rear straight pipe section, first connecting plates are symmetrically arranged on the left side and the right side of the flange plate of each rectifying joint, first guide holes are formed in each first connecting plate, each guide rod penetrates through the first guide holes in the first connecting plates on the corresponding side, and a pressure spring sleeved on the guide rod is supported between the front first connecting plate and the rear adjacent first connecting plate.
Further, first actuating mechanism includes outer barrel, interior barrel and piston ring, the rear end of outer barrel is fixed in on the preceding support, interior barrel is coaxial to be located in the urceolus, links to each other between the front end of interior barrel and the outer barrel to form the sealed annular chamber of front end between interior barrel and the outer barrel, the piston ring adaptation in the annular chamber, the passing of barrel, the rear end of piston ring and preceding straight tube section fixed connection are followed to preceding straight tube section, the front portion of annular chamber still is connected with supplies/the blast pipe.
Furthermore, a supporting table extending in the front-back direction and a second driving mechanism for driving the supporting table to lift are arranged between the front support and the rear support on the workbench, and the sliding groove is formed in the supporting table; through holes are formed in the front support and the rear support corresponding to the guide rods, fixing caps are arranged at one ends of the guide rods, and the other ends of the guide rods penetrate through the through holes in the front support and the rear support and are fixed through nuts; adapter connectors are arranged at two ends of the detection section and between the front straight pipe section and the rear straight pipe section, flange plates are arranged at two ends of each adapter connector, second connecting plates are symmetrically arranged on the left side and the right side of each adapter connector, second guide holes are formed in each second connecting plate, each guide rod penetrates through the second guide hole in the corresponding second connecting plate, and a pressure spring sleeved on each guide rod is supported between the adjacent first connecting plate and the adjacent second connecting plate.
Further, a section of the adapter close to the front straight pipe section or the rear straight pipe section is set as a reducer section, and a section of the adapter close to the detected flowmeter is set as a rectifier section.
Further, the second driving mechanism comprises a screw rod, a front sliding block and a rear sliding block, the screw rod is arranged below the supporting table in parallel and is rotatably installed on the workbench, the screw rod penetrates through the front sliding block and the rear sliding block, external threads with opposite rotating directions are arranged on the front section and the rear section of the screw rod, the external threads on the front section of the screw rod are matched with the front sliding block, the external threads on the rear section of the screw rod are matched with the rear sliding block, a front inclined surface is arranged on the lower portion of the front end of the supporting table, a front driving surface matched with the front inclined surface is arranged on the upper portion of the front sliding block, a rear inclined surface is arranged on the lower portion of the rear end of the supporting table, and a rear driving surface matched with.
Further, be provided with the constant head tank on the workstation, brace table, preceding slider and back slider are all arranged in the constant head tank.
Further, the sliding groove is a V-shaped groove with a wide upper part and a narrow lower part.
Further, the rectifying section adopts a honeycomb rectifier.
The invention has the beneficial effects that: the device can detect a plurality of flowmeters at one time, the rectifying joints are arranged among the detected flowmeters, the purpose of eliminating disturbance, vortex and other interferences generated when water flows pass through a flowmeter and ensuring the stability of water flow among the flowmeters is achieved, during detection, the rectifying joints are pushed open by a pressure spring, the detected flowmeters are arranged on chutes among the rectifying joints, the detected flowmeters are positioned through the chutes, the detected flowmeters and the rectifying joints can be ensured to be coaxial, then a first driving mechanism is controlled to drive a front straight pipe section to move backwards, the front straight pipe section pushes the detected flowmeters and the rectifying joints to slide backwards along the chutes, so that the front straight pipe section, the detected flowmeters, the rectifying joints and a rear straight pipe section are pushed tightly and connected in series to form a closed pipeline, the pressure spring is compressed at the moment, then water flows into the pipeline, the detected flowmeters can be detected and calibrated, after detection is completed, the first driving mechanism is controlled to drive the front straight pipe section to, each rectifying section is bounced off under the effect of pressure spring, can easily take off the flowmeter under examining from between the rectifying section, and above-mentioned device can adapt to the detection of different length flowmeters.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 is a top view of an embodiment of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
fig. 3 is a sectional view B-B of fig. 1.
In the drawings, 100 — the table; 110-a front support; 120-rear support; 130-a chute; 140-a guide bar; 141-a fixing cap; 142-a nut; 150-positioning grooves; 200-a front straight tube section; 210-a first drive mechanism; 211-outer cylinder; 212-inner cylinder; 213-a piston ring; 214-ring cavity; 215-supply/exhaust pipes; 300-a rear straight tube section; 310-standard flow meter; 400-detection section; 410-a flow meter under test; 420-a rectifying section; 421-a first connecting plate; 422-first guide hole; 423-pressure spring; 500-supporting table; 510-a second drive mechanism; 511-screw mandrel; 512-front slider; 513-rear slider; 514-front bevel; 515-front drive face; 516-rear bevel; 517-rear driving surface; 600-a crossover joint; 610-a second connecting plate; 620-second pilot hole; 630-a reducer section; 640-a rectifying section.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
As shown in fig. 1 to 3, an embodiment of the present invention provides a liquid flowmeter detection device, which includes a workbench 100, a front straight pipe section 200, a rear straight pipe section 300, and a detection section 400.
The front and rear supports 110 and 120 are oppositely arranged on the workbench 100, a sliding groove 130 extending in the front-rear direction is arranged between the front support 110 and the rear support 120 on the workbench 100, the sliding groove 130 is preferably a V-shaped groove with a wide upper part and a narrow lower part, and two guide rods 140 parallel to the sliding groove 130 are arranged on two sides of the sliding groove 130 between the front support 110 and the rear support 120.
The front straight pipe section 200 passes through the front support 110, the front straight pipe section 200 can slide back and forth relative to the front support 110, a first driving mechanism 210 for driving the front straight pipe section 200 to move back and forth is further mounted on the front support 110, and a flange is arranged at the rear end of the front straight pipe section 200.
A specific first driving mechanism 210 is shown in FIG. 2, the first driving mechanism 210 includes an outer cylinder 211, an inner cylinder 212 and a piston ring 213, a rear end of the outer cylinder 211 is fixed on the front support 110, the inner cylinder 212 is coaxially disposed in the outer cylinder 211, a front end of the inner cylinder 212 is connected with the outer cylinder 211 to form an annular cavity 214 with a sealed front end between the inner cylinder 212 and the outer cylinder 211, the piston ring 213 is fitted in the annular cavity 214, the front straight pipe section 200 passes through the inner cylinder 212, a rear end of the piston ring 213 is fixedly connected with the front straight pipe section 200, and a supply/exhaust pipe 215 is further connected to a front portion of the annular cavity 214. When air is supplied from the outside into the annular chamber 214 through the air supply/exhaust pipe 215, the piston ring 213 moves backward, so that the piston ring 213 drives the front straight pipe section 200 to move backward, and when the annular chamber 214 is exhausted through the air supply/exhaust pipe 215, the piston ring 213 moves forward, so that the piston ring 213 drives the front straight pipe section 200 to move forward.
The rear straight tube section 300 is fixed on the front support 110, the rear straight tube section 300 is coaxial with the front straight tube section 200, and a standard flowmeter 310 is connected in series on the rear straight tube section 300.
The detection section 400 comprises a plurality of detected flow meters 410 and rectifying sections 420 spaced among the detected flow meters 410, the rectifying sections 420 adopt honeycomb rectifiers, two ends of each detected flow meter 410 and each rectifying section 420 are provided with flange plates, each detected flow meter 410 and each rectifying section 420 are supported on the sliding chute 130 and are coaxial with the front straight pipe section 200 and the rear straight pipe section 300, the left side and the right side of each flange plate of each rectifying section 420 are symmetrically provided with first connecting plates 421, each first connecting plate 421 is provided with a first guide hole 422, each guide rod 140 respectively penetrates through the first guide hole 422 on the first connecting plate 421 on the corresponding side, and a pressure spring 423 sleeved on each guide rod 140 is supported between the front and rear adjacent first connecting plates 421.
The device can detect a plurality of flowmeters at one time, the rectifying joints 420 are arranged between the flowmeters 410 to be detected, the interference of disturbance, vortex and the like generated when water flows pass through a flowmeter timer is eliminated, the stability of the water flow between the flowmeters is ensured, during detection, the rectifying joints 420 are jacked open by the compression springs 423, the flowmeters 410 to be detected are arranged on the chutes 130 between the rectifying joints 420, the flowmeters 410 to be detected are positioned through the chutes 130, the coaxiality of the flowmeters 410 to be detected and the rectifying joints 420 can be ensured, then the first driving mechanism 210 is controlled to drive the front straight pipe section 200 to move backwards, the front straight pipe section 200 jacks the flow meters 410 to be detected and the rectifying joints 420 to slide backwards along the chutes 130, the front straight pipe section 200, the flowmeters 410 to be detected, the rectifying joints 420 and the rear straight pipe section 300 are jacked and connected in series to form a closed pipeline, at the moment, the compression springs 423 are compressed, then water flows, after the detection is finished, the first driving mechanism 210 is controlled to drive the front straight pipe section 200 to move forwards, and the rectifying joints 420 are bounced open under the action of the compression springs 423, so that the detected flowmeter 410 can be easily taken down from among the rectifying joints 420.
In a preferred embodiment, referring to fig. 1, 2 and 3, a support base 500 extending in a front-rear direction and a second driving mechanism 510 for driving the support base 500 to ascend and descend are provided on the table 100 between the front support 110 and the rear support 120, and the chute 130 is opened on the support base 500.
A specific second driving mechanism 510 is shown in fig. 2, the second driving mechanism 510 includes a screw rod 511, a front slider 512 and a rear slider 513, the screw rod 511 is disposed below the supporting platform 500 in parallel and rotatably mounted on the worktable 100, the screw rod 511 passes through the front slider 512 and the rear slider 513, the front section and the rear section of the screw rod 511 are provided with external threads with opposite rotation directions, the external thread of the front section of the screw rod 511 is matched with the front slider 512, the external thread of the rear section of the screw rod 511 is matched with the rear slider 513, the lower part of the front end of the supporting platform 500 is provided with a front inclined surface 514, the upper part of the front slider 512 is provided with a front driving surface 515 matched with the front inclined surface 514, the lower part of the rear end of the supporting platform 500 is provided with a rear inclined surface 516, and the upper part of the rear slider 513 is. When the screw 511 drives the front slider 512 and the rear slider 513 to synchronously move towards the middle, the front slider 512 and the rear slider 513 synchronously lift the two ends of the supporting platform 500 upwards through the inclined plane effect, and when the screw 511 drives the front slider 512 and the rear slider 513 to synchronously move towards the two ends, the front slider 512 and the rear slider 513 synchronously lower the two ends of the supporting platform 500 through the inclined plane effect, so that the parallel lifting of the supporting platform 500 can be realized.
Through holes are formed in the front support 110 and the rear support 120 corresponding to the guide rods 140, fixing caps 141 are arranged at one ends of the guide rods 140, and the other ends of the guide rods 140 penetrate through the through holes in the front support 110 and the rear support 120 and are fixed through nuts 142. Adapter 600 is arranged between the two ends of the detection section 400 and the front straight pipe section 200 and the rear straight pipe section 300, flanges are arranged at the two ends of the adapter 600, second connecting plates 610 are symmetrically arranged on the left side and the right side of the flange of each adapter 600, second guide holes 620 are formed in each second connecting plate 610, each guide rod 140 penetrates through the second guide holes 620 in the second connecting plates 610 on the corresponding side, and a pressure spring 423 sleeved on each guide rod 140 is supported between the adjacent first connecting plate 421 and the second connecting plate 610.
The purpose of the adapter 600 is to enable the front straight pipe section 200 and the rear straight pipe section 300 to be connected with the meters 410 to be tested with different pipe diameters, so that the diameters of the two ends of the adapter 600 may be different, in order to eliminate the influence of the adapter 600 on the detection of the meters 410 to be tested connected with the adapter 600, a section of the adapter 600 close to the front straight pipe section 200 or the rear straight pipe section 300 is set as a reducing section 630, and a section of the adapter 600 close to the meters 410 to be tested is set as a rectifying section 640.
In this embodiment, be provided with constant head tank 150 on the workstation 100, constant head tank 150 is all arranged in to support platform 500, preceding slider 512 and back slider 513, and accessible constant head tank 150 is fixed a position support platform 500 like this, avoids support platform 500 lift in-process to take place the skew and influence detection section 400 and preceding straight tube section 200 and back straight tube section 300 centering.
By adopting the scheme, the device can be adjusted to adapt to detection of the detected flowmeters 410 with different diameters, when the diameter of the detected flowmeter 410 is adjusted, the nut 142 on the guide rod 140 can be firstly screwed off, the guide rod 140 can be pulled out, then the second driving mechanism 510 is controlled to adjust the height of the support table 500, the support table is made to be suitable for the diameter of the detected flowmeter 410 to be detected, then the conversion joint 600 and the rectifying section 420 are replaced by the conversion joint 600 and the rectifying section 420 which are suitable for the diameter of the detected flowmeter 410 to be detected, and finally the guide rod 140 is penetrated and the nut 142 is screwed on for fixation.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (8)
1. A fluid flow meter detection device, comprising:
the front support and the rear support are oppositely arranged on the workbench in the front and back direction, a sliding groove extending in the front and back direction is arranged between the front support and the rear support on the workbench, and two guide rods parallel to the sliding groove are arranged on two sides of the sliding groove between the front support and the rear support;
the front straight pipe section penetrates through the front support and can slide back and forth relative to the front support, a first driving mechanism for driving the front straight pipe section to move back and forth is further mounted on the front support, and a flange plate is arranged at the rear end of the front straight pipe section;
the rear straight pipe section is fixed on the front support, is coaxial with the front straight pipe section, and is connected with a standard flowmeter in series;
the detection section comprises a plurality of detected flowmeters and rectifying joints spaced among the detected flowmeters, flange plates are arranged at two ends of each detected flowmeter and rectifying joint, each detected flowmeter and rectifying joint are supported on the sliding groove and are coaxial with the front straight pipe section and the rear straight pipe section, first connecting plates are symmetrically arranged on the left side and the right side of the flange plate of each rectifying joint, first guide holes are formed in each first connecting plate, each guide rod penetrates through the first guide holes in the first connecting plates on the corresponding side, and a pressure spring sleeved on the guide rod is supported between the front first connecting plate and the rear adjacent first connecting plate.
2. The device for detecting the liquid flowmeter as claimed in claim 1, wherein the first driving mechanism comprises an outer cylinder, an inner cylinder and a piston ring, the rear end of the outer cylinder is fixed on the front support, the inner cylinder is coaxially arranged in the outer cylinder, the front end of the inner cylinder is connected with the outer cylinder so as to form an annular cavity with a sealed front end between the inner cylinder and the outer cylinder, the piston ring is adapted in the annular cavity, the front straight pipe section passes through the inner cylinder, the rear end of the piston ring is fixedly connected with the front straight pipe section, and a gas supply/discharge pipe is further connected to the front part of the annular cavity.
3. The liquid flowmeter detecting device according to claim 1, wherein a support table extending in the front-rear direction and a second driving mechanism for driving the support table to ascend and descend are provided on the table between the front support and the rear support, and the chute is provided on the support table;
through holes are formed in the front support and the rear support corresponding to the guide rods, fixing caps are arranged at one ends of the guide rods, and the other ends of the guide rods penetrate through the through holes in the front support and the rear support and are fixed through nuts;
adapter connectors are arranged at two ends of the detection section and between the front straight pipe section and the rear straight pipe section, flange plates are arranged at two ends of each adapter connector, second connecting plates are symmetrically arranged on the left side and the right side of each adapter connector, second guide holes are formed in each second connecting plate, each guide rod penetrates through the second guide hole in the corresponding second connecting plate, and a pressure spring sleeved on each guide rod is supported between the adjacent first connecting plate and the adjacent second connecting plate.
4. The liquid flowmeter detecting device according to claim 3, wherein a section of the adapter near the front straight pipe section or the rear straight pipe section is a reducer section, and a section of the adapter near the detected flowmeter is a rectifier section.
5. The liquid flowmeter detecting device according to claim 3, wherein the second driving mechanism includes a screw rod, a front slider and a rear slider, the screw rod is disposed below the support table in parallel and rotatably mounted on the table, the screw rod passes through the front slider and the rear slider, the front section and the rear section of the screw rod are provided with external threads having opposite rotation directions, the external thread of the front section of the screw rod is engaged with the front slider, the external thread of the rear section of the screw rod is engaged with the rear slider, the lower portion of the front end of the support table is provided with a front inclined surface, the upper portion of the front slider is provided with a front driving surface engaged with the front inclined surface, the lower portion of the rear end of the support table is provided with a rear inclined surface, and the upper portion of the rear slider is provided with a rear driving surface engaged with.
6. The apparatus of claim 5, wherein the worktable is provided with a positioning groove, and the support platform, the front slider and the rear slider are disposed in the positioning groove.
7. The fluid flowmeter detecting device of claim 1, wherein the slide groove is a V-shaped groove with a wide top and a narrow bottom.
8. The fluid flow meter testing device of claim 1, wherein said rectifier section employs a honeycomb rectifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110261234.1A CN113049067A (en) | 2021-03-10 | 2021-03-10 | Liquid flowmeter detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110261234.1A CN113049067A (en) | 2021-03-10 | 2021-03-10 | Liquid flowmeter detection device |
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| Publication Number | Publication Date |
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| CN113049067A true CN113049067A (en) | 2021-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110261234.1A Pending CN113049067A (en) | 2021-03-10 | 2021-03-10 | Liquid flowmeter detection device |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1054470A (en) * | 1996-02-26 | 1998-02-24 | Bianchini Ron | Gas leak sensing cutoff valve provided with reset protective unit, and detachable pipe coupling |
| CN104373718A (en) * | 2014-11-17 | 2015-02-25 | 重庆达沃斯食品有限公司 | Telescopic flange used for milk filter |
| CN205561991U (en) * | 2016-04-11 | 2016-09-07 | 武汉市计量测试检定（研究）所 | Two -way tong -test ammeter device |
| CN110220576A (en) * | 2019-07-25 | 2019-09-10 | 浙江裕顺仪表有限公司 | A kind of efficient gas flow standard device that can examine and determine more flowmeters simultaneously |
| CN209485506U (en) * | 2019-04-09 | 2019-10-11 | 丹东通博测控工程技术有限公司 | A kind of tested flowmeter clamping device of flow standard device |
| CN211525645U (en) * | 2019-12-30 | 2020-09-18 | 天津市博沃斯阀门有限公司 | Expansion flange butterfly valve |
-
2021
- 2021-03-10 CN CN202110261234.1A patent/CN113049067A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1054470A (en) * | 1996-02-26 | 1998-02-24 | Bianchini Ron | Gas leak sensing cutoff valve provided with reset protective unit, and detachable pipe coupling |
| CN104373718A (en) * | 2014-11-17 | 2015-02-25 | 重庆达沃斯食品有限公司 | Telescopic flange used for milk filter |
| CN205561991U (en) * | 2016-04-11 | 2016-09-07 | 武汉市计量测试检定（研究）所 | Two -way tong -test ammeter device |
| CN209485506U (en) * | 2019-04-09 | 2019-10-11 | 丹东通博测控工程技术有限公司 | A kind of tested flowmeter clamping device of flow standard device |
| CN110220576A (en) * | 2019-07-25 | 2019-09-10 | 浙江裕顺仪表有限公司 | A kind of efficient gas flow standard device that can examine and determine more flowmeters simultaneously |
| CN211525645U (en) * | 2019-12-30 | 2020-09-18 | 天津市博沃斯阀门有限公司 | Expansion flange butterfly valve |
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