CN2377523Y - Solid flowmeter of impact plate type - Google Patents
Solid flowmeter of impact plate type Download PDFInfo
- Publication number
- CN2377523Y CN2377523Y CN 99203912 CN99203912U CN2377523Y CN 2377523 Y CN2377523 Y CN 2377523Y CN 99203912 CN99203912 CN 99203912 CN 99203912 U CN99203912 U CN 99203912U CN 2377523 Y CN2377523 Y CN 2377523Y
- Authority
- CN
- China
- Prior art keywords
- punching
- casing
- axle
- measuring mechanism
- technical characterictic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Measuring Volume Flow (AREA)
Abstract
The utility model belongs to the field of a flow measurement instrument of the apparatus and the instrument professions, and the technical characteristic is that the shaft of an impact plate is supported by the box body of the impact plate. The reasonable design of the current guiding direction of a current guiding barrel in the box body of the impact plate makes the material current impact on one side of the impact plate, which drives the connecting body of the impact plate to rotate round the shaft of the impact plate, and the displacement variation of a conversion element is formed. Besides, the displacement quantity can be converted into the electrical signal to make the detection and the metering. Compared with the public known flowmeter of the impact plate type, the utility model has simple structure, few consumable material, easy processing, low cost improved measurement precision of the instrument, easy seal, explosion suppression and convenient installation and debugging.
Description
The invention belongs to flow measurement instrument field in instrument, the instrument specialty.
In common processing, transportation, the storage process in industries such as chemical industry, metallurgy, mine, coal, cement, glassware, grain, harbour, storages, for the metering of the diffusing shape particle of solid, powder material, generally adopt horizontal shift formula solid bulk material impact flow meter (hereinafter to be referred as impact flow meter).
The principle of work of the impact flow meter of producing on the market at present,, circulating and use is punching horizontal shift formula (the auspicious Fig. 1 of opinion).
Among Fig. 1, last figure is the schematic diagram that punching is subjected to the displacement of material impact-level, and figure below is the be connected as a whole axonometric drawing of instrument of punching mechanism and measuring mechanism, and wherein 1 is punching, the 2nd, punching axle, the 3rd, material diversion tube, the 4th, punching case, the 5th, measurement mechanical case.Because punching is tilting, with horizontal line one angle is arranged, the impulsive force to punching when then material falls is decomposed a horizontal component F
MAnd downward vertical stress component F
G, F
GUpwards mechanical support power counteracting by wavy spring plate group (in measurement mechanical case 5) balances each other.F
MMake punching and the displacement of punching axle occurred level, F
MAll the time the horizontal distortion elastic force with wavy spring plate group balances each other, the displacement of punching and punching axle, motion, thereby driving differential transformer (in the measurement mechanical case 5) iron core that links to each other with the punching axle is subjected to displacement, the displacement of iron core and motion produce voltage signal on the differential transformer coil, this voltage signal is proofreaied and correct through shaping, linearization, become frequency signal,, give secondary instrument or computing machine and show, handle again further through computing, the conversion of electronic loop.
It more than is the principle of work of present known impact flow meter.
Above-mentioned principle of work has determined this impact flow meter to produce a series of defectives, is listed below:
1, because sensitive element---deadweight and material that wavy spring plate group will support punching and punching axle impact the vertical stress component F that punching produced
G, therefore must have certain mechanical strength, it is too little that its volume just can not be done.The wavy spring plate size of the impact flow meter of seeing usually has 310 * 410 * 0.75 (thickness) mm approximately
3/ sheet, 9～13 combinations of every side, both sides altogether.Because the volume of wavy spring plate group is big, the volume of punching can not be dwindled by the restriction of flow range, cause the overall volume of impact flow meter excessive, and punching and measuring mechanism are divided into two casings (punching case and measuring mechanism case, there is caulking gum spare to link to each other between two tanks and isolates) with environmental facies, the punching axle passes two casings and forms a complete impact flow meter at the scene, this makes this instrument very inconvenient in use, install, debugging is all very loaded down with trivial details, allow the user finish the last assembling task of instrument.
2, because sensitive element, wavy spring board component volume is bigger, cause corresponding various mechanical connecting structure part, group Buddhist nun oil cylinder, casing volume all big and complex-shaped, consume that material is many, processing technology is complicated, thereby the manufacturing cost costliness.
(3), because sensitive element---wavy spring plate group volume is bigger, cause punching axial translation amount big, and crossing two casings, the punching axle must move horizontally, thereby two casings pass the gap that the place, hole must reserve the motion of punching axle horizontal at the punching axle, dust when this causes impact flow meter to use in the bulk material can very fast (approximately starting the back less than one hour) pass through these gaps, be full of in the measuring mechanism casing (having electric power loop and electronic switch loop in this case), and be circulated in the damping oil cylinder, this all will influence the measuring accuracy and the serviceable life of impact flow meter.
(4), for some inflammable, explosive solid-state dust, for example, powder such as coal dust, PVC pellet, nitramine particle, letting alone powder fills in the measuring mechanism casing by the between centers crack from the punching case, because in the measuring mechanism casing is the occasion that is connected with power supply, can not be effectively with inflammable, explosive material is isolated, then have the possibility that non-safe spark takes place, and is danger close.
(5), the conveying of bulk material has considerable occasion to be provided with the airslide conveyor tool (being that bulk material is on the process pipeline after the impact flow meter metering) below the impact flow meter in general, as gas-lift pump, airslide conveyor etc., all there is a disturbing flow in the use of these machineries to impact flow meter, its acting force upwards impacts on punching, just opposite with the effect of bulk material impact punching, thus the measuring accuracy of interference impact flow meter.
The present invention takes following technical scheme for improving, avoid the defective of above-mentioned impact flow meter, and existing division is as follows:
1, at above-mentioned defective (3), (4), can elastic sealing gasket be set at the axis hole place of wearing of punching case (or measuring mechanism case), its outer rim is connected with punching case (or measuring mechanism case), and its endoporus is connected with the punching axle.
When this scheme can guarantee that existing known impact flow meter uses, the material dust of its punching case can not fill in the measuring mechanism case, thereby improved sensitive element---the working environment of wavy spring plate group and damping oil cylinder, improved the measuring accuracy and the serviceable life of impact flow meter, and had the flame proof effect for inflammable and explosive material.
2, can adopt following scheme at above-mentioned defective (1), (2), (3), (4), (5):
Punching and punching axle are coupled as one, punching axle two ends pass the punching casing, pass through bearing (bearing shell bearing at punching casing place, ball bearing, roller bearing, known bearing such as top bearing all can) supported, and make the punching axle rotatable, the charging aperture of appropriate design material, impact on half punching of punching center line the same side after making loose unpacked material enter the punching case, the part that the punching shaft extension goes out outside the casing is provided with rigidity punching link rod frame, punching link rod frame, punching, the punching axle makes its comprehensive gravity center be positioned at the below of punching axle when being coupled as one, be the steady state of a kind of static weighing apparatus like this when the punching axle is subjected to the bearing supporting, punching plane and horizontal angle are constant in the time of can guaranteeing static state all the time.Be provided with on the punching link rod frame and measure sensing assembly, range regulating device, damping unit and chromacoder, the movable end of these assemblies, device links to each other with punching link rod frame, and stiff end is fixed on the punching casing.The appropriate location is provided with the electronic circuit board that contains electric power loop on the punching casing then, then constitutes a complete instrument with the correct connection of the change-over circuit in the chromacoder, is referred to as the torque type impact flow meter.
During the work of torque type impact flow meter, punching is subjected to the impact of motion material, makes the punching axle produce a rotating torque, produces displacement thereby drive punching link rod frame, and this displacement signal is used, measures through being converted to the instrument standard electric signal.Measure sensing assembly and be used for the above-mentioned rotating torque of balance, damping unit is used to prevent that excessive, too fast impact from causing the vibration of instrument, the acting in conjunction of range regulating device and measurement sensitive element makes instrument applicable to different logistics capacities, thereby can conveniently change range.
Because measuring the sensitive element assembly only is used for the balance bulk material and impacts the moment that punching produced, no longer support the weight of punching and punching axle, this just can improve the measuring accuracy of sensitive element, dwindle the volume of sensitive element greatly, corresponding damping unit, range regulating device johning knot member, position-limit mechanism all can reduce volume, and all be arranged on the punching box body outside, no longer need the excessive measuring mechanism casing of volume, thereby improve the one-piece construction of flowmeter, simple in structure, consumptive material is few, handling ease, cost is low, and improved the measuring accuracy of instrument, and accomplish the sealing flame proof easily, Installation and Debugging are convenient.
The present invention proposes following embodiment in conjunction with the accompanying drawings:
Fig. 2 is at above-mentioned defective (3), (4) and to the improvement embodiment of horizontal shift formula impact flow meter, among Fig. 2, the 1st, punching, the 2nd, the punching axle, 1,2 rigid attachment together, the 4th, the punching casing, the 5th, the measuring mechanism casing, the 6th, sealing gasket between casing, 6 effect cuts off two seal cases mutually with external environment, and the fluidised form dust is not spread to external environment.The 7th, punching sealing pad, the one end is fixed on the measuring mechanism casing, the other end uses clip 9 to be fixed on the punching axle 2, its effect is that the blocking-up dust enters in the measuring mechanism casing by punching axial translation gap, the 10th, pressure ring, the 8th, set bolt, 10 and 8 use makes 6,7 and 5 to combine as a whole.In order to make 6,7 setting not influence the horizontal shift of punching axle, 6,7 all should select for use and have certain flexible flexible material, for example, and rubber, soft plastics, leather etc.
Obviously, adopt the method for mold pressing that part 6,7 systems are as a whole, its effect is the same.
Equally, tighten up if an end of part 6 seals mutually with part 4, the other end directly and the punching sealing tighten up, can prevent effectively that then the fluid materials dust from going out outside the punching case, play sealing function.
Adopt so that scheme can prevent effectively that the fluid materials dust from entering in the measuring mechanism case, the measuring accuracy and the serviceable life of the formula of improving the standard impact flow meter, and, have the flame proof function for inflammable and explosive material.
Torque type punching principle can be adopted in defective (1), (2), (3), (4), (5) at known impact flow meter, as the embodiment of Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9:
Fig. 3 is the principle assumption diagram of torque type impact flow meter, and the B that removes among Fig. 3 behind the casing top is Fig. 4 to view, and the axonometric drawing that removes among Fig. 3 after casing and the partial component is Fig. 5.
In Fig. 3, Fig. 4, Fig. 5, the 1st, punching, the 2nd, punching axle, the 3rd, material diversion tube.The 4th, the punching casing, the 7th, punching sealing pad (its planform and mounting means are the same with punching sealing pad 7 among Fig. 2), the 9th, punching link rod frame, the 10th, measure sensing assembly, the 11st, the range regulating device, the 12nd, damping unit, the 13rd, chromacoder, the 14th, protective cover, the 15th, the punching hanging handle, the 16th, punching bearing (or bearing shell bearing or ball bearing or roller bearing or top bearing), the 17th, electronic circuit board (having functions such as power supply, various electrical signal conversion, counting, shaping, output) can be installed on correct position on 4.
Structure so, because 1,9,10,11,12,13,15 all below punching axle fulcrum, be easy to make structural focus to be in the below of punching axle, then this structure is the steady structure of a kind of weighing apparatus, can keep the position angle of punching constant when static, the water conservancy diversion direction of guide shell so reasonably is set, allows material impact the position of axis one side on punching all the time, this example is the punching upper right quarter.Both sides size symmetry because of the punching axis, the moment equal and opposite in direction that the weight of material produces, direction is opposite, have only the impact kinetic energy of material produce C to moment cause the rotation of punching around axle, thereby driving punching link rod frame 9 sways, 9 left frame is to top offset, cause that 10 deform, C to moment with measure sensing assembly 10 moment of elasticity that is produced that deforms and balance each other, and the conversion element that 9 displacement drives in the chromacoder 13 is subjected to displacement, and by 13 displacement is converted to the standard electric signal.
Fig. 6 is an amplification assumption diagram of measuring sensing assembly.Wherein, the 18th, elastic bellows, the moment of elasticity that 18 deform is produced is used for the balance punching and is subjected to material to impact the rotating torque that is produced, the 19th, fixed support, the 20th, gib screw, the 21st, corrugated tube connecting rod, one end and 18 is fixed, one end and 9 fixing, 22 is 19 installation fixing position on casing 4, changes 22 positions on 4 along the D direction and then can regulate 18 and act on 9 elastic force size.
Obviously copy the structure of Fig. 6, use the elastic bellows 18 in volute spring, elastic diaphragm capsule, flexible sheet or flexible sheet group, U-shaped, the V-arrangement spring steel plate permutation graph 6, will be lead-pipe cinch for instrument, instrumentation engineering professional.
Fig. 7 is the amplification assumption diagram of range regulating device.Wherein 23 is pickup arms, the 24th, volute spring, the 25th, coupling bolt is fastened on the pickup arm 25,25 screw rod inserts respectively in the 24 helical spring center pits, the 27th, fixed support, the 28th, set bolt, 28 are fixed on 24 the other end on 27, the 29th, welding position, the 26th, setting nut, the position of adjusting 26 on 25 screw rods be the elastic force size of scalable 24 then, thereby changes the measurement range of instrument.The 42nd, spacing screw rod prevents to measure outrange.
Obviously, adopting other flexible members to replace volute spring as the range regulating device in Fig. 7, is lead-pipe cinch for instrument, instrumentation engineering professional.
Fig. 8 is the amplification assumption diagram of chromacoder, present embodiment adopts differential transformer type throw-over gear, 4 is punching casings among Fig. 8, the 9th, punching link rod frame, the 29th, the differential transformer coil, the 30th, the differential transformer coil brace, differential transformer coil fastener hole 33 is arranged on it, load onto supporting bolt 33 and can clamp the differential transformer coil, and make 29 can regulate (this will play a crucial role), the 31st, differential transformer iron core, the 32nd, bracket fixing bolt in the position on 30 in the instrument zero-bit is regulated, change 32 positions on 4, can regulate 31 and 29 reference position.Punching is impacted during instrumentation, produces moment, drives 9 and rotates, thereby make 31 displacements that take place with respect to 29, and differential transformer coil 29 just produces alternating voltage signal output, is sent to electronic loop and carries out various calculating, detection.This conversion is that the displacement conversion that is subjected to material to impact rotation punching connected frame punching is the differential voltage signal.
Apparent for this professional personage, with differential transformer coil, iron core mechanism among Fig. 8, adopt differential capacitance type mechanism (perhaps adopting strain resistance type mechanism) to replace, being subjected to punching material to impact the displacement conversion of rotating the punching connected frame is differential capacitor (perhaps strain resistor) signal, and the conversion of so carrying out displacement～electric signal then also is a lead-pipe cinch.
Fig. 9 is the damping unit structural drawing, present embodiment adopts damping oil cylinder formula mechanism, 9 is punching link rod frames among Fig. 9, the 41st, and damping oil cylinder cylinder body, the 34th, oil cylinder cylinder cap, the 35th, the cylinder cap sealing gasket, the 36th, lubrication hole and screw, the 37th, oil cylinder connecting rod, the 38th, damping sheet, the 39th, cylinder cap erection bolt, the 40th, damping oil.The shell of 41 damping oil cylinder cylinder bodies is fixed on the punching casing 4.The effect of damping unit is to prevent that the impact of punching is too fast and the vibration that causes electric signal.
Obviously, adopt electromagnetic type, perhaps the gasbag-type damping mechanism comes the structure of permutation graph 9, then is lead-pipe cinch for this professional personage.
In Fig. 3, if remove hanging handle 15, punching 1 is placed the top (rigidity is fixed) of punching axle, shorten the insertion length of guide shell, all the other members are constant, and then the effect of instrument is the same.Figure 10 is the synoptic diagram of this scheme.
Adopt the designed torque type punching flow of such scheme to have following advantage:
1, volume is little, and the excessive measuring mechanism casing of volume has been fallen in reform, and whole impact flow meter is being made Factory all finishes general assembly, debugging work, has guaranteed the assembling quality of instrument, has made things convenient for the user. And make and add The worker is easy to manufacture, reduces manufacturing cost.
2, because the axis bilateral symmetry of punching, moment equal and opposite in direction, opposite direction that weight of material produces, interact to offset, and material only impacts half side at punching, the moment that produces only with the impact kinetic energy (mv of material2) be directly proportional, how much relevant with the speed of material measured value is only with the quality of material, thereby Be thereby that truly mass flow has improved certainty of measurement.
3, when the punching below has disturbing flow upwards to impact, since punching axle bilateral symmetry, gas shock The moment that punching produces is the both sides equities, so disturbing flow is to then not impact of certainty of measurement, thereby Guarantee certainty of measurement.
4, moment is only rotated its (in sensing element same displacement amount situation) because the punching axle is hit Rotational angle is very little, so the punching axle is easy to seal at the axis hole place of punching casing, thereby can Prevent that material from going out in the case external environment, both accomplished safety of sympathetic initiation, accomplish again to prevent contaminated environment.
In sum, the present invention is than known horizontal displacement formula impact flow meter, its novelty, creativeness, Practicality is apparent.
Claims (10)
1, a kind of novel punching solid flowmeter, form by punching, punching axle, punching casing and measuring mechanism, measuring mechanism case, its technical characterictic is to pass measuring mechanism casing place at the punching axle to be provided with the resilient seal packing ring, the endoporus of packing washer tightens up mutually with the punching axle, and the outer rim of packing washer tightens up mutually with the measuring mechanism casing.
2, the described punching solid flowmeter of claim 1, its technical characterictic is to pass punching casing place at the punching axle to be provided with the resilient seal packing ring, the endoporus of packing washer seals mutually with the punching axle and tightens up, and the outer rim of packing washer seals mutually with punching casing (or punching casing and measuring mechanism casing) and tightens up.
3, a kind of novel punching solid flowmeter, by punching, the punching axle, punching casing and measuring mechanism, electronic circuit board is formed, its technical characterictic is after punching and punching axle combine as a whole, the punching axle is supported by the punching casing passing punching casing place, the guide shell outlet of material is all the time facing in the punching zone of punching center line one side, when making punching impacted by material, punching rotates around the punching axis, the position that the punching axle passes the punching case is linked with the punching connected frame, the punching connected frame is provided with measuring mechanism, is provided with sensitive element assembly and chromacoder in the measuring mechanism at least.
4, the described punching solid flowmeter of claim 3, its technical characterictic is also to be provided with the range governor motion in the measuring mechanism.
5, claim 3,4 described punching solid flowmeters, its technical characterictic is also to be provided with damping mechanism in the measuring mechanism.
6, claim 3,4,5, described punching solid flowmeter, its technical characterictic is that an end of the sensitive element assembly that is provided with in the measuring mechanism, chromacoder, range governor motion, damping mechanism connects mutually with the punching connected frame, and the other end connects mutually with the punching casing.
7, claim 3,4,5,6 described punching solid flowmeters, its technical characterictic is to pass punching casing place at the punching axle to be provided with the flexible sealing packing ring, the endoporus of flexible sealing packing ring and punching axle tighten up, the outer rim of flexible sealing packing ring and punching casing are closely linked, and reliably that the punching case is inside and outside isolated.
8, claim 3,4,5,6,7 described punching solid flowmeters, its technical characterictic are to pass punching casing place at the punching axle bearing (can be ball bearing, or bearing shell bearing or roller bearing, or top bearing) is set supports the punching axle.
9, claim 3,4,5,6,7,8 described punching solid flowmeters, its technical characterictic are in measuring sensing assembly, adopt the moment of elasticity that distortion produced of flexible member to come the balance punching to be subjected to material to impact the rotating torque that is produced.
10, claim 3,4,5,6,7,8,9 described punching solid flowmeters, its technical characterictic are that punching to be subjected to material to impact the displacement conversion of rotating the punching connected frame in chromacoder be electric signal (differential voltage, differential capacitor, strain resistor all can).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99203912 CN2377523Y (en) | 1999-02-23 | 1999-02-23 | Solid flowmeter of impact plate type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99203912 CN2377523Y (en) | 1999-02-23 | 1999-02-23 | Solid flowmeter of impact plate type |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2377523Y true CN2377523Y (en) | 2000-05-10 |
Family
ID=33998882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99203912 Expired - Fee Related CN2377523Y (en) | 1999-02-23 | 1999-02-23 | Solid flowmeter of impact plate type |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2377523Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806604A (en) * | 2010-04-15 | 2010-08-18 | 孙家鼎 | Accurate measurement device of powder |
| CN103335681A (en) * | 2013-06-21 | 2013-10-02 | 孙家鼎 | Lever-type device for monitoring mass flow rate of powder |
| CN107014446A (en) * | 2017-03-17 | 2017-08-04 | 合肥固泰自动化有限公司 | A kind of punching Flow Meter for Solid Materials |
| WO2018000802A1 (en) * | 2016-06-27 | 2018-01-04 | 山西新元自动化仪表有限公司 | Impact plate belt scale and weighing method thereof |
-
1999
- 1999-02-23 CN CN 99203912 patent/CN2377523Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806604A (en) * | 2010-04-15 | 2010-08-18 | 孙家鼎 | Accurate measurement device of powder |
| CN101806604B (en) * | 2010-04-15 | 2012-08-15 | 孙家鼎 | Accurate measurement device of powder |
| CN103335681A (en) * | 2013-06-21 | 2013-10-02 | 孙家鼎 | Lever-type device for monitoring mass flow rate of powder |
| WO2018000802A1 (en) * | 2016-06-27 | 2018-01-04 | 山西新元自动化仪表有限公司 | Impact plate belt scale and weighing method thereof |
| CN107543597A (en) * | 2016-06-27 | 2018-01-05 | 山西新元自动化仪表有限公司 | Punching belt conveyer scale and its weighing technique |
| CN107014446A (en) * | 2017-03-17 | 2017-08-04 | 合肥固泰自动化有限公司 | A kind of punching Flow Meter for Solid Materials |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN2377523Y (en) | Solid flowmeter of impact plate type | |
| CN101598631A (en) | Electromechanical dynamic loading device for reducer | |
| CN209802583U (en) | Pressure gauge with protection structure | |
| JPS61280523A (en) | Device for weighing flow of bulky substance | |
| CN208818413U (en) | A kind of cushioning pressure table | |
| CN205670157U (en) | Diaphragm-type optical-fiber accelerometer | |
| CN1297803C (en) | Float weighing sensor and PID deviation control method for dynamic coeighing | |
| US7168328B2 (en) | Measuring device for determining the mass rate of flow of a mass flow | |
| Hess et al. | Dynamic analysis of threaded fasteners subjected to axial vibration | |
| CN201852664U (en) | Shock-proof precision pressure meter | |
| CN109307500A (en) | A method of based on vibration velocity peak computational motor shaft eccentricity | |
| CN212513158U (en) | High-precision impulse type meter | |
| CN208872454U (en) | A kind of capsule pressure gauge with balancing controls | |
| CN206740066U (en) | Explosion-proof swing offset measurement apparatus | |
| TW202204899A (en) | Apparatus for measuring air velocity of sinter bed surface | |
| CN201266104Y (en) | Temperature-resistant overpressure-resistant sealing mechanical shock-resisting level indicator | |
| CN213206346U (en) | Electronic spiral balance front end bearing seal structure | |
| CN101246184A (en) | Quasi-two-dimension magnetic fluid acceleration transducer | |
| CN2593163Y (en) | Continuous powder material flowmeter | |
| CN1145988A (en) | Pressure sleeve with thread ring | |
| CN210198610U (en) | Liquid damper for pressure gauge, mechanical shock absorber core and pressure gauge | |
| CN215811049U (en) | Wet water meter with novel assembly mode | |
| CN219776976U (en) | Stainless steel shock-resistant pressure gauge convenient to adjust | |
| CN2447735Y (en) | Bearing balancing electronic bulk flowmeter | |
| CN211602276U (en) | Pressure gauge device for metering detection |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |