CN214471213U - One-way volume pipe - Google Patents
One-way volume pipe Download PDFInfo
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- CN214471213U CN214471213U CN202121022896.5U CN202121022896U CN214471213U CN 214471213 U CN214471213 U CN 214471213U CN 202121022896 U CN202121022896 U CN 202121022896U CN 214471213 U CN214471213 U CN 214471213U
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Abstract
The utility model relates to an one-way volume pipe, including the transmission chamber, the transmission intracavity be provided with the replacement ball, one of transmission chamber serve the intercommunication and have the one end of standard pipeline section, the standard pipeline section closes on one of transmission chamber and serves and be provided with originated verification switch, the intercommunication has the separation chamber on the other end of standard pipeline section, the standard pipeline section closes on one of separation chamber and serves and be provided with termination verification switch, the separation chamber below is provided with the conversion chamber, be provided with sealed conversion equipment between conversion chamber and the separation chamber, the bottom in conversion chamber is provided with the ball support hydro-cylinder, the output of ball support hydro-cylinder with sealed conversion equipment be connected, be linked together through the conversion connection chamber between conversion chamber and the transmission chamber, be provided with the inserted bar hydro-cylinder on the conversion connection chamber. The space height requirement of the detected flowmeter for online verification by using the product is reduced. The utility model discloses adjust, convenient to use, have extensive market prospect.
Description
Technical Field
The utility model relates to a volume pipe field, concretely relates to one-way volume pipe.
Background
The volume tube is a standard device used for the online verification work of the flowmeter, the volume tube is connected in series with the downstream of the detected flowmeter, and the liquid flowing out of the detected flowmeter flows out through the volume tube, so that the verification or calibration of the detected flowmeter is realized.
The conventional volumetric pipe is very high in installation height, especially a one-way volumetric pipe. In the actual work, some of the detected flowmeters are not easy to detach for off-line verification, the detected flowmeters are usually verified in an on-line verification mode, the volume tubes are sometimes installed on the mobile equipment, the mobile equipment is moved to a preset verification working area in normal work, and the verification work is inconvenient, unsafe or unreliable when the moving process or the working area has limited high requirements.
Disclosure of Invention
The utility model provides a to prior art not enough, the utility model provides a can reduce the one-way volume pipe of the one-way volume pipe mounting height of tradition for overcome defect among the prior art.
The utility model adopts the technical proposal that: the utility model provides an one-way volume pipe, includes the transmission chamber, the transmission intracavity be provided with the replacement ball, one of transmission chamber serve the intercommunication and have the one end of standard pipeline section, the standard pipeline section closes on one of transmission chamber and serves and be provided with originated verification switch, the intercommunication has the separation chamber on the other end of standard pipeline section, the standard pipeline section closes on one of separation chamber and serves and be provided with termination verification switch, the separation chamber below is provided with the conversion chamber, be provided with sealed conversion equipment between conversion chamber and the separation chamber, the bottom in conversion chamber is provided with the ball support hydro-cylinder, the output of ball support hydro-cylinder with sealed conversion equipment be connected, be linked together through the conversion connection chamber between conversion chamber and the transmission chamber, be provided with the inserted bar hydro-cylinder on the conversion connection chamber.
Preferably, the sealing conversion device comprises a sealing seat, the sealing seat comprises a guide part and a sealing part, the guide part is located above the sealing part, the guide part adopts an inverted truncated cone-shaped tubular structure, the sealing part adopts a truncated cone-shaped tubular structure, a ball supporting block is arranged in the sealing part, and a ball supporting block sealing ring is arranged on the ball supporting block.
Preferably, a slide way is arranged in the launching cavity below the conversion connecting cavity, and the slide way and the central axis of the launching cavity form 10-20 degrees.
Preferably, the ball supporting block is provided with an oil cylinder fixing pipe, the oil cylinder fixing pipe is installed at the output end of the ball supporting oil cylinder, oil cylinder fixing bolts are arranged at the output ends of the oil cylinder fixing pipe and the ball supporting oil cylinder, the oil cylinder fixing bolts are distributed in a star shape on the outer side of the central axis of the output end of the oil cylinder fixing bolt, and the number of the oil cylinder fixing bolts is a plurality.
Preferably, the sealing part is provided with a leakage detection valve, a leakage detection groove is arranged on a ball supporting block sealing ring on the inner side of the leakage detection valve, and the leakage detection groove is communicated with the leakage detection valve.
Preferably, a pressing ring is arranged above the ball supporting block sealing ring and the ball supporting block, and the pressing ring and the ball supporting block are fixed through a pressing ring fixing bolt.
Preferably, conversion chamber and separation chamber on all be provided with seal receptacle mounting flange, seal receptacle mounting flange's quantity adopts two, the seal receptacle mounting flange inboard that the guide part suit is connected at the separation chamber, the sealing position between two seal receptacle mounting flanges, two seal receptacle mounting flanges with the sealing position between all be provided with the seal receptacle sealing washer, two seal receptacle mounting flanges pass through seal receptacle fixing bolt and fix.
Preferably, the ball supporting block on seted up the ball supporting block spread groove, the fixed pipe of hydro-cylinder is installed in ball supporting block spread groove, is provided with the strengthening rib between the lateral wall of ball supporting block spread groove and the outer wall of the fixed pipe of hydro-cylinder, the quantity of strengthening rib adopts a plurality of, a plurality of strengthening rib is the outside of star distribution at the axis of the fixed pipe of hydro-cylinder.
The utility model has the advantages that: first, the utility model discloses reduced one-way volume pipe and to installation space's high requirement, improved the application scope of product, be convenient for popularize and apply on a large scale.
Secondly, the replacement ball through sealed conversion equipment's guide back stop in the top of ball supporting block sealed conversion equipment in the ball supporting block by ball supporting cylinder drive back, the replacement ball of guide top be in ball supporting cylinder drive under pass through the seal receptacle. And simplifies the structure of the backflow plate and the spring for limiting the motion state of the backflow plate in the prior art. The number of easily-consumed parts is reduced, and the efficiency of installation and maintenance is improved.
Finally, the top of holding in the palm ball piece sealing washer and holding in the palm ball piece be provided with the clamping ring, this product sets up the quantity of clamping ring and adopts one, and the clamping ring passes through clamping ring fixing bolt with the holding in the palm ball piece and fixes clamping ring fixing bolt and be convenient for the dismantlement of holding in the palm ball piece sealing washer to change, the clamping ring adopts round platform shape annular structure. The annular structure is adopted by the pressure ring, so that the overall weight of the ball supporting block is reduced, and the load of the ball supporting oil cylinder is reduced. The service life of the ball supporting oil cylinder is prolonged.
The utility model has the advantages of simple structure, convenient operation, design benefit has improved work efficiency greatly, has fine social and economic benefits, is the product of easily using widely.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic view of the cross-sectional structure of the components of the present invention.
Fig. 3 is a schematic structural diagram of the sealing seat of the present invention.
Fig. 4 is a schematic structural diagram of the separation chamber of the present invention.
Fig. 5 is a schematic structural view of the separation chamber of the present invention.
Fig. 6 is a schematic structural diagram of the launching cavity of the present invention.
Fig. 7 is a perspective view of a prior art one-way volumetric tube.
Fig. 8 is a cross-sectional structural view of a prior art unidirectional volume tube member.
Fig. 9 is a schematic structural view of a prior art unidirectional volume tube member.
Detailed Description
As shown in fig. 1, 2, 3, 4, 5, and 6, a one-way volume tube comprises a launching cavity 1, one end of the launching cavity 1 is communicated with one end of a standard tube section 2, one end of the standard tube section 2 close to the launching cavity 1 is provided with an initial verification switch 3, the other end of the standard tube section 2 is communicated with a separation cavity 4, one end of the standard tube section 2 close to the separation cavity 4 is provided with a termination verification switch 5, a conversion cavity 6 is arranged below the separation cavity 4, a sealing conversion device is arranged between the conversion cavity 6 and the separation cavity 4, the bottom of the conversion cavity 6 is provided with a ball supporting cylinder 7, the output end of the ball supporting cylinder 7 is connected with the sealing conversion device, the conversion cavity 6 is communicated with the launching cavity 1 through a conversion connection cavity 8, and the conversion connection cavity 8 is provided with an inserted rod cylinder 9.
In order to make the replacement ball smoothly enter the standard pipe section, a slide way 13 is arranged in the launching cavity 1 below the conversion connecting cavity 8, the slide way 13 and the central axis of the launching cavity 1 form 10-20 degrees, and the bottom end of the slide way 13 is fixedly connected with the bottom end of the inner wall of the launching cavity 1. The number of the slide ways 13 is at least two. Be provided with the guide gap between two adjacent slides 13, guide gap and slide 13 parallel, launch cavity 1 among the prior art adopts the cylindrical cavity of non-constant diameter usually communicating the cavity between being examined flowmeter and standard pipe section 2, through setting up two piece at least slides 13 and setting up at two adjacent slides 13 the guide gap for replace ball 25 can utilize before getting into standard pipe section 2 the guide gap lead, make replace ball 25 can smoothly, steadily get into standard pipe section, and can not receive the influence of the turbulent phenomenon of the interior fluid of launch cavity tee bend cavity.
The sealing conversion device comprises a sealing seat 10, the sealing seat 10 comprises a guide part and a sealing part, the guide part is located above the sealing part, the guide part adopts an inverted truncated cone-shaped tubular structure, the sealing part adopts a truncated cone-shaped tubular structure, a ball supporting block 11 is arranged in the sealing part, and a ball supporting block sealing ring 12 is arranged on the ball supporting block 11. The sealing part is provided with a leakage detection valve 16, a leakage detection groove 17 is arranged on the ball supporting block sealing ring 12 on the inner side of the leakage detection valve 16, the leakage detection groove 17 is of a circular groove-shaped structure, and the leakage detection groove 17 is communicated with the leakage detection valve 16.
The number of the ball supporting block sealing rings 12 is one, and compared with the method shown in FIG. 8, the number of the sealing rings in the prior art is reduced by one, so that the number of parts is reduced; because the ball supporting oil cylinder 7 for driving the ball supporting block 11 of the product is positioned below the ball supporting block 11, when the ball supporting block 11 is closed, the replacement ball 25 finishes a standard verification stroke and then stays above the ball supporting block 11 after being guided by the guide part of the product, after the ball supporting block 11 in the sealing conversion device is driven by the ball supporting oil cylinder 7, the replacement ball 25 above the guide part drives the ball supporting block 11 to pass through the sealing seat 10 under the driving of the ball supporting oil cylinder.
Compared with the prior art, as shown in fig. 7 and 8, in the prior art, the ball pusher is driven by the ball pushing cylinder above the ball pusher to move upwards, in order to inhibit the backflow phenomenon of the fluid below the sealing seat, 4 backflow plates are arranged below the sealing seat in order to prevent the backflow, as shown in fig. 9, in the open state of the ball pusher above the sealing seat, the 4 backflow plates are under the action of the springs arranged on the backflow plates, and the 4 backflow plates are combined to form a 'sealing plate' to prevent the backflow below the sealing seat under the action of the fluid below the sealing seat; when the ball pusher is closed on the sealing seat, the 4 backflow plates are all deflected downwards due to the extrusion of the ball pushing block arranged below the ball pusher.
As shown in fig. 7 and 8, because the displacement ball of the prior art is located in the upper chamber of the prior art seat after one stroke, the oil below the prior art seat enters the upper chamber of the prior art seat as a result of this back flow, which is not beneficial to the process of displacing the ball past the seat; and the ball supporting block of this product has blockked palirrhea just right, and the ball supporting block is facing to palirrhea downstream, this just in time has blockked the impact of palirrhea to the ball of trading and be favorable to replacement ball 25 pass through seal receptacle 10, consequently this product seal receptacle 10 has left out among the prior art push away ball piece, the refluence board and be used for a series of complicated subassemblies such as the spring that the refluence board resets, the required mounting height of the volume pipe has not only been reduced, simultaneously corresponding refluence board among the prior art that has reduced, a series of subassemblies such as spring, the equipment structure has been simplified, the production that brings because the structure is complicated has been reduced simultaneously and the loaded down with trivial details problem of maintenance process.
The separation cavity 4 adopts a three-way structure, the first end of the separation cavity 4 is connected with the standard pipe section 2, the sealing conversion device is installed at the second end of the separation cavity 4, the first end of the separation cavity 4 and the third end of the separation cavity 4 are located on the same axis, a plurality of ball blocking rods 26 are arranged in the third end of the separation cavity 4, and oil passing gaps are formed among the ball blocking rods 26. The launching cavity 1 adopts a three-way structure, the standard pipe section 2 is connected with the first end of the launching cavity 1, the first end of the launching cavity 1 and the third end of the launching cavity 1 are located on the same axis, the third end of the launching cavity 1 is located below the second end of the launching cavity 1, and the conversion connecting cavity 8 is installed on the second end of the launching cavity 1.
Conversion chamber 6 adopt three-way structure or four-way structure, the first end in conversion chamber 6 and the second end in conversion chamber 6 are located same axis, the third end in conversion chamber 6 is located between the first end in conversion chamber 6 and the second end in conversion chamber 6, the second end in conversion chamber 6 is located the top of the third end in conversion chamber 6, the cylinder body of ball support hydro-cylinder 7 is installed on the first end in conversion chamber 6, conversion connection chamber 8 is installed on the third end in conversion chamber 6, conversion chamber 6 is provided with quick-open blind plate 27 in the one side of keeping away from the third end in conversion chamber 6. Separation chamber 4 install and serve at the second of conversion chamber 6, the top of holding in the palm ball piece sealing washer 12 and holding in the palm ball piece 11 be provided with clamping ring 18, this product sets up the quantity of clamping ring 18 and adopts one, clamping ring 18 and holding in the palm ball piece 11 are fixed through clamping ring fixing bolt 19, through dismantling and fixing clamping ring fixing bolt 19 be convenient for hold in the palm the dismantlement change of ball piece sealing washer 12, clamping ring 18 adopts round platform shape annular structure. The annular structure of the press ring 18 is convenient for reducing the overall weight of the ball supporting block 11, thereby reducing the load of the ball supporting oil cylinder 7.
The ball supporting block 11 on be provided with hydro-cylinder fixing pipe 14, hydro-cylinder fixing pipe 14 is installed on the output of ball supporting hydro-cylinder 7, is provided with hydro-cylinder fixing bolt 15 on the output of hydro-cylinder fixing pipe 14 and ball supporting hydro-cylinder 7, hydro-cylinder fixing bolt 15 and hydro-cylinder fixing bolt 15's output threaded connection, hydro-cylinder fixing bolt 15's quantity adopts a plurality of, a plurality of hydro-cylinder fixing bolt 15 is the outside of star distribution at hydro-cylinder fixing bolt 15's output axis.
Conversion chamber 6 and separation chamber 4 on all be provided with seal receptacle mounting flange 20, seal receptacle mounting flange 20's quantity adopts two, the guide part suit in the seal receptacle mounting flange 20 inboard that separation chamber 4 is connected, the sealing position be located between two seal receptacle mounting flange 20, two seal receptacle mounting flange 20 with the sealing position between all be provided with seal receptacle sealing washer 21, two seal receptacle mounting flange 20 are fixed through seal receptacle fixing bolt 22.
The ball supporting block 11 on seted up ball supporting block connecting groove 23, the oil cylinder fixing tube 14 is installed in ball supporting block connecting groove 23, the axis of oil cylinder fixing tube 14, the axis of ball supporting block connecting groove 23 and the axis of ball supporting block 11 are located same axis, be provided with strengthening rib 24 between the lateral wall of ball supporting block connecting groove 23 and the outer wall of oil cylinder fixing tube 14, strengthening rib 24 is the sheet structure, the quantity of strengthening rib 24 adopts a plurality of, a plurality of strengthening rib 24 is the outside of star distribution at the axis of oil cylinder fixing tube 14.
The use method of the product is as follows: as shown in fig. 1, 2, 3, 4, 5 and 6, firstly, the product is preinstalled, the to-be-tested flowmeter is installed at the upstream of the emission cavity 1, and the to-be-tested flowmeter and the emission cavity 1 are kept in series; connecting the start verification switch 3 and the end verification switch 5 to the matched counters; the third end of the separation cavity 4 is communicated to an oil pipeline; the pre-installation of the product is completed.
After the preinstallation of the product is completed, the preparation process of the product is needed to be carried out, so that the product is in a measurement stable state, and the preparation process of the product can be started: keep the cylinder pole of inserted bar hydro-cylinder 9 in the state of stretching out, retrieve the cylinder pole of ball support hydro-cylinder 7 in the cylinder body, the cylinder pole of ball support hydro-cylinder 7 drives ball support block 11 and moves to preset position, drop into conversion chamber 6 through quick-open blind plate 27 on conversion chamber 6 with replacement ball 25, replacement ball 25 stops on the cylinder pole of inserted bar hydro-cylinder 9 this moment, stretch out the cylinder pole of ball support hydro-cylinder 7 again to ball support block 11 and seal receptacle 10 closure, switch the process flow to the volumetric tube examination state, make the fluid fully flow through this product discharge this product in the gas, accomplish the preparation process of this product promptly.
After the preparation process of the product is finished, the normal verification process of the product can be started, the oil passes through the detected flowmeter, the cylinder rod of the inserted rod oil cylinder 9 is retracted into the cylinder body of the inserted rod oil cylinder 9, the replacement ball 25 enters the launching cavity 1, the oil drives the replacement ball 25 to enter the standard pipe section 2, when the displacement ball 25 triggers the start verification switch 3, the counter begins to accumulate pulses from the meter output, when the displacement ball 25 triggers the verification stopping switch 5, the counter stops accumulating the pulse output by the flowmeter, the standard volume V of the standard pipe section 2 between the verification starting switch 3 and the verification stopping switch 5 is corrected by temperature and pressure to obtain the actual accumulated flow volume Q under the verification condition of the detected flowmeter, and determining the metering performance of the flowmeter according to the N and Q and parameters such as pressure, temperature and the like under the verification condition.
When a next detection is needed after a detection process is completed, the replacement ball 25 is stopped by the ball stopping rod 26 and stays on the ball supporting block 11, the ball supporting oil cylinder 7 is driven, the cylinder rod of the ball supporting oil cylinder 7 is retracted into the cylinder body, the cylinder rod of the ball supporting oil cylinder 7 drives the ball supporting block 11 to move to a preset position, the replacement ball 25 falls along with the ball supporting block 11 and enters the conversion cavity 6, then enters the conversion connection cavity 8 and is supported by the cylinder rod of the inserted rod oil cylinder 9, the ball supporting oil cylinder 7 is driven again, the cylinder rod of the ball supporting oil cylinder 7 extends out until the ball supporting block 11 and the seal seat 10 are closed, then the inserted rod oil cylinder 9 is driven, the cylinder rod of the inserted rod oil cylinder 9 is retracted into the cylinder body of the inserted rod oil cylinder 9, and the replacement ball 25 enters the emission cavity 1 to perform the next detection.
Through the embodiment, the height requirement of the traditional one-way volume pipe on the installation space is reduced, meanwhile, the ball supporting oil cylinder 7 for driving the ball supporting block 11 is positioned below the sealing seat 10, the reverse flow below the sealing seat 10 is blocked by the ball supporting block at the moment that the ball supporting block 11 is opened from the sealing seat 10, and the replacement ball moves along with the downward movement of the ball supporting block, so that the structure is more favorable for the replacement ball 25 to pass through the sealing seat 10, and a series of components such as a reverse flow plate, a spring and the like are omitted on the sealing seat 10 of the product based on the favorable effect of the structure on the replacement ball 25, the easily damaged parts are reduced, the frequency of equipment maintenance is correspondingly reduced, meanwhile, the product is provided with the press ring 18 at the top of the ball supporting block 11, the ball supporting block connecting groove 23 is arranged on the bottom surface of the ball supporting block 11, the weight of the ball supporting block connecting groove 23 which is integrally reduced and the connecting part in transmission with the ball supporting oil cylinder 7, and the load of the ball supporting oil cylinder 7 is reduced, thereby indirectly prolonging the service life of the ball supporting oil cylinder 7.
The utility model discloses an one-way volume pipe that satisfies in volume pipe field worker needs makes the utility model discloses extensive market prospect has.
Claims (8)
1. A one-way volumetric tube, comprising: comprises a launching cavity (1), a replacement ball (25) is arranged in the launching cavity (1), one end of the launching cavity (1) is communicated with one end of a standard pipe section (2), one end of the standard pipe section (2) close to the launching cavity (1) is provided with an initial verification switch (3), the other end of the standard pipe section (2) is communicated with a separation cavity (4), one end of the standard pipe section (2) close to the separation cavity (4) is provided with a termination verification switch (5), a conversion cavity (6) is arranged below the separation cavity (4), a sealing conversion device is arranged between the conversion cavity (6) and the separation cavity (4), a ball supporting oil cylinder (7) is arranged at the bottom of the conversion cavity (6), the output end of the ball supporting oil cylinder (7) is connected with the sealing conversion device, the conversion cavity (6) is communicated with the launching cavity (1) through a conversion connection cavity (8), an inserted rod oil cylinder (9) is arranged on the conversion connecting cavity (8).
2. The unidirectional volume tube of claim 1, wherein: the sealing conversion device comprises a sealing seat (10), wherein the sealing seat (10) comprises a guide part and a sealing part, the guide part is positioned above the sealing part, the guide part adopts an inverted truncated cone-shaped tubular structure, the sealing part adopts a truncated cone-shaped tubular structure, a ball supporting block (11) is arranged in the sealing part, and a ball supporting block sealing ring (12) is arranged on the ball supporting block (11).
3. The unidirectional volume tube of claim 1, wherein: conversion connect chamber (8) below be provided with slide (13) in transmission chamber (1), the axis in slide (13) and transmission chamber (1) is 10 degrees to 20 degrees.
4. The unidirectional volume tube of claim 2, wherein: the ball supporting block (11) is provided with an oil cylinder fixing pipe (14), the oil cylinder fixing pipe (14) is installed at the output end of the ball supporting oil cylinder (7), oil cylinder fixing bolts (15) are arranged at the output ends of the oil cylinder fixing pipe (14) and the ball supporting oil cylinder (7), the number of the oil cylinder fixing bolts (15) is a plurality of, and the oil cylinder fixing bolts (15) are distributed in a star shape in the outer side of the output end central axis of the oil cylinder fixing bolts (15).
5. The unidirectional volume tube of claim 2, wherein: the sealing part is provided with a leakage detection valve (16), a leakage detection groove (17) is arranged on a ball supporting block sealing ring (12) on the inner side of the leakage detection valve (16), and the leakage detection groove (17) is communicated with the leakage detection valve (16).
6. The unidirectional volume tube of claim 2, wherein: and a pressing ring (18) is arranged above the ball supporting block sealing ring (12) and the ball supporting block (11), and the pressing ring (18) and the ball supporting block (11) are fixed through a pressing ring fixing bolt (19).
7. The unidirectional volume tube of claim 2, wherein: conversion chamber (6) and separation chamber (4) on all be provided with seal receptacle mounting flange (20), the quantity of seal receptacle mounting flange (20) adopts two, guide part suit seal receptacle mounting flange (20) inboard that separation chamber (4) are connected, the sealing be located between two seal receptacle mounting flange (20), two seal receptacle mounting flange (20) with the sealing between all be provided with seal receptacle sealing washer (21), two seal receptacle mounting flange (20) are fixed through seal receptacle fixing bolt (22).
8. A unidirectional volume tube as claimed in claim 3, wherein: the ball supporting block (11) on seted up ball supporting block connecting groove (23), install in ball supporting block connecting groove (23) hydro-cylinder fixed tube (14), be provided with between the lateral wall of ball supporting block connecting groove (23) and the outer wall of hydro-cylinder fixed tube (14) strengthening rib (24), the quantity of strengthening rib (24) adopts a plurality of, a plurality of strengthening rib (24) are the outside of star distribution at the axis of hydro-cylinder fixed tube (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121022896.5U CN214471213U (en) | 2021-05-13 | 2021-05-13 | One-way volume pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121022896.5U CN214471213U (en) | 2021-05-13 | 2021-05-13 | One-way volume pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214471213U true CN214471213U (en) | 2021-10-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121022896.5U Active CN214471213U (en) | 2021-05-13 | 2021-05-13 | One-way volume pipe |
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| CN (1) | CN214471213U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113155244A (en) * | 2021-05-13 | 2021-07-23 | 开封仪表有限公司 | One-way volume tube and using method thereof |
-
2021
- 2021-05-13 CN CN202121022896.5U patent/CN214471213U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113155244A (en) * | 2021-05-13 | 2021-07-23 | 开封仪表有限公司 | One-way volume tube and using method thereof |
| CN113155244B (en) * | 2021-05-13 | 2023-02-24 | 开封仪表有限公司 | One-way volume tube and use method thereof |
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