CN114259944A - Carbon fiber polymerization liquid auxiliary material injection method and device thereof - Google Patents
Carbon fiber polymerization liquid auxiliary material injection method and device thereof Download PDFInfo
- Publication number
- CN114259944A CN114259944A CN202210001635.8A CN202210001635A CN114259944A CN 114259944 A CN114259944 A CN 114259944A CN 202210001635 A CN202210001635 A CN 202210001635A CN 114259944 A CN114259944 A CN 114259944A
- Authority
- CN
- China
- Prior art keywords
- polymerization liquid
- rotating shaft
- auxiliary material
- pipeline
- nozzle
- 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.)
- Granted
Links
Images
Landscapes
- Polymerisation Methods In General (AREA)
Abstract
The invention provides a carbon fiber polymerization liquid auxiliary material injection method and a device thereof, wherein the device is provided with a polymerization liquid pipeline and a cylinder body, the upper part of the cylinder body is fixed in the polymerization liquid pipeline, a rotating shaft is arranged in the cylinder body, the lower end of the rotating shaft is connected with a driving mechanism, an opening is arranged on the cylinder body, a nozzle is arranged on the rotating shaft, the nozzle and the opening are both arranged in the polymerization liquid pipeline, the size of the opening is the same as that of the nozzle, the overlapping of the opening and the shape of the nozzle can be realized by rotating the rotating shaft, an auxiliary material supply pipeline is connected on the rotating shaft, the pressure of the auxiliary material supply pipeline is greater than the pressure in the polymerization liquid pipeline, the rotating shaft is a hollow shaft, and sealing structures are arranged between the polymerization liquid pipeline and the cylinder body and below the rotating shaft. The auxiliary material flow metering device solves the technical problems that when auxiliary materials are injected in the existing carbon fiber production, the auxiliary material flow metering error is large, the hysteresis quality and the stability are poor, frequent cleaning and maintenance are needed, and the production efficiency is low. The invention can be widely applied to the fields of carbon fiber production, pharmacy, chemical industry and the like.
Description
Technical Field
The invention relates to a carbon fiber production method and a device, in particular to a carbon fiber polymerization liquid auxiliary material injection method and a device.
Background
In the production process of carbon fibers, it is important to add auxiliary materials to the polymerization liquid for stabilizing the quality, and the injection amount and uniformity of the auxiliary materials directly influence the quality of subsequent products. At present, a rotameter, a vortex shedding flowmeter or a pore plate flowmeter and the like are generally adopted in the carbon fiber industry to measure the amount of auxiliary materials injected into a polymerization liquid, but the error is large when the flow is measured to be small, the hysteresis is realized, and a buffer area is arranged between the rear part of the device and a main material pipeline, so that the stability is poor when the device is used at a small flow. In the using process, the liquid backflow phenomenon is often accompanied, so that the rotating shaft nozzle is blocked, and after the rotating shaft nozzle is produced for a period of time, the rotating shaft nozzle needs to be cleaned, and the production efficiency is seriously influenced.
Disclosure of Invention
The invention provides a carbon fiber polymerization liquid auxiliary material injection method and device, which can accurately control the injection of auxiliary materials, can adjust the flow in real time, have stable flow, no hysteresis and good injection uniformity and aims at solving the technical problems of large auxiliary material flow metering error, hysteresis, poor stability, frequent cleaning and maintenance requirements and lower production efficiency when the auxiliary materials are injected in the existing carbon fiber production.
Therefore, the technical scheme of the invention is that the carbon fiber polymerization liquid auxiliary material injection device is provided with a polymerization liquid pipeline and a cylinder body, the upper part of the cylinder body is fixed in the polymerization liquid pipeline, a rotating shaft is arranged in the cylinder body, the cylinder body and the rotating shaft are of a concentric structure, the lower end of the rotating shaft is connected with a driving mechanism, the rotating shaft can rotate in the cylinder body under the driving of the driving mechanism, the cylinder body is provided with an opening, the rotating shaft is provided with a nozzle, the nozzle and the opening are both arranged in the polymerization liquid pipeline, the size of the opening is the same as that of the nozzle, the overlapping of the opening and the nozzle can be realized by rotating the rotating shaft, the rotating shaft is connected with an auxiliary material supply pipeline, the pressure of the auxiliary material supply pipeline is greater than that in the polymerization liquid pipeline, the rotating shaft is a hollow shaft, and sealing structures are arranged between the polymerization liquid pipeline and the cylinder body and below the rotating shaft.
Preferably, a connecting flange is arranged at the lower part of the polymerization liquid pipeline, a pipeline flange is arranged below the connecting flange, the sealing structure comprises a sealing structure I and a sealing structure II, the sealing structure I is positioned between the polymerization liquid pipeline and the cylinder body, the sealing structure II is positioned below the rotating shaft, the sealing structure I is provided with a packing I, the packing I is arranged in a packing box I, and the pipeline flange fixes the packing box I in the connecting flange; the sealing structure II comprises a packing II and a packing gland, the packing II is arranged in a packing box II, and the packing gland fixes the packing box II in the pipeline flange.
Preferably, the driving mechanism comprises a servo motor and a servo speed reducer, the servo motor is located below the servo speed reducer, the servo speed reducer is provided with an output shaft, the output shaft is connected with the rotating shaft, the speed reducer is provided with a speed reducer flange, and the speed reducer flange is connected with the packing gland.
Preferably, a delivery pump is arranged on the polymerization liquid pipeline.
Preferably, the rotating shaft and the cylinder are in clearance fit.
Preferably, the nozzle is a combination of a plurality of rectangular holes, and the rectangular holes are arranged in two rows in the axial direction of the rotary shaft.
A carbon fiber polymerization liquid auxiliary material injection method comprises the following specific steps:
(1) before use, calibrating the device;
(2) adjusting the calibrated device to a closed state, namely completely staggering the opening on the cylinder and the nozzle on the rotating shaft, and installing the device on a polymerization liquid pipeline;
(3) interlocking a servo motor with a driving mechanism of a delivery pump to realize synchronous control;
(4) the speed of the servo motor is adjusted to realize the adjustment of the ratio of the auxiliary material input quantity to the flow speed of the polymer liquid.
The beneficial effects of the invention are that,
(1) the device has the advantages of simple structure, lower manufacturing cost and convenient operation, the adjustment of the input amount of the auxiliary materials is easily realized through the adjustment of the rotating speed of the rotating shaft, and the accurate adjustment of the ratio of the polymerization liquid to the auxiliary materials is realized through the interlocking control of the rotating shaft driving mechanism and the polymerization liquid delivery pump driving mechanism;
(2) the device has no buffer zone, and only one layer of pipe is arranged between the auxiliary material and the polymerization liquid, so that the device is easy to adjust and control;
(3) this device only need check nozzle in service behavior and the service conditions of packing box when stopping at every turn, and when servo motor or servo speed reducer broke down, this device easily still can manually rotate the rotation axis and realize adjusting, has reduced the maintenance cost of overhaul.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
The symbols in the drawings illustrate that:
1. a rotating shaft; 2. a nozzle; 3. a barrel; 4. opening holes; 5. a pipeline medium; 6. an auxiliary material; 7. a stuffing box I; 8. a polymerization liquid conduit; 9. a bolt; 10. a connecting flange; 11. a pin; 12. a connecting bolt; 13. the auxiliary material is externally connected with a flange; 14. an auxiliary material inlet; 15. a bolt; 16. a stuffing box II; 17. a pipe flange; 18. a pin; 19. a packing gland; 20. a reducer flange; 21. an output shaft; 22. a servo reducer; 23. a servo motor.
Detailed Description
The present invention will be further described with reference to the following examples.
As shown in fig. 1, a carbon fiber polymerization liquid auxiliary material injection device, be equipped with polymerization liquid pipeline 8 and barrel 3, be equipped with the delivery pump on the polymerization liquid pipeline 8, pipeline medium 5 flows in polymerization liquid pipeline 8 under the effect of delivery pump, barrel 3 upper portion is fixed in polymerization liquid pipeline 8, be equipped with rotation axis 1 in the barrel 3, barrel 3 and rotation axis 1 are concentric structure, servo reducer 22 is connected to rotation axis 1 lower extreme, servo reducer 22 upper portion is equipped with output shaft 21, output shaft 21 is connected with rotation axis 1 and drives rotation axis 1 and rotate, servo reducer 22 below is equipped with servo motor 23, rotation axis 1 and barrel 3 are clearance fit, realize that rotation axis 1 rotates in barrel 3 under the drive of servo reducer 22. The filler is tetrafluoro filler.
Be equipped with opening 4 on barrel 3, rotation axis 1 is the hollow shaft, barrel 3 and rotation axis 1 choose for use stainless steel 316L, be equipped with nozzle 2 on the hollow shaft, nozzle 2 is the combination of a plurality of rectangular hole, the rectangular hole is arranged along two rows of branch of rotation axis 1's axial, the quantity of rectangular hole is the same on two rows, two rows of rectangular hole symmetric arrangement, opening 4 size is the same with nozzle 2 size or opening 4 size slightly is greater than nozzle 2 outline size, nozzle 2 all establishes in polymerization liquid pipeline 8 with opening 4, the degree of coincidence of accessible rotation axis 1 adjustment opening 4 and nozzle 2, and then realize the adjustment of auxiliary material 6 and polymerization liquid ratio.
A sealing structure I is arranged between the polymerization liquid pipeline 8 and the cylinder 3, and a sealing structure II is arranged below the rotating shaft 1. The lower part of the polymerization liquid pipeline 8 is provided with a connecting flange 10, a pipeline flange 17 is arranged below the connecting flange 10, a sealing structure I is provided with a packing I, the packing I is arranged in a packing box I7, and the packing box I7 is fixed in the connecting flange 10 by the pipeline flange 17; the sealing structure II comprises a packing II and a packing gland 19, the packing II is arranged in a packing box II 16, the packing gland 19 fixes the packing box II 16 in a pipeline flange 17, a speed reducer flange 20 is arranged on a servo speed reducer 22, and the speed reducer flange 20 is fixed on the packing gland 19 through a connecting bolt 12. The pipeline flange 17 is connected with the connecting flange 10 through bolts 9 and is prevented from rotating through a pin 11, and the packing gland 19 is connected with the pipeline flange 17 through bolts 15 and is prevented from rotating through a pin 18.
The lower part of rotation axis 1 is equipped with auxiliary material entry 14, also is equipped with the same opening on the barrel 3 of corresponding high position department, keeps two department's of hole to connect unblocked all the time, can satisfy in the production process the maximum amount of auxiliary material 6 can, be equipped with the external flange of auxiliary material 13 in pipeline flange 17's corresponding high department, connect the auxiliary material supply line on the external flange of auxiliary material 13, the external auxiliary material storage tank of auxiliary material supply line, the pressure is higher than the polymerization liquid pipeline 3kg best in the auxiliary material storage tank. If the auxiliary material storage tank needs to be replaced, the device needs to be stopped in the middle, namely the opening 4 at the upper part of the cylinder body 3 and the nozzle 2 on the rotating shaft 1 are rotated to different angles to be completely staggered, so that the polymerization liquid is prevented from flowing back to the inside of the nozzle 2.
A carbon fiber polymerization liquid auxiliary material injection method comprises the following specific steps:
(1) before use, the device is calibrated: because the gas state is not easy to calibrate, water can be adopted for calibrating, and because the density is different from the flow velocity of the nozzle, the average value can be obtained through multiple metering by contrast conversion, and the calibration can also be carried out on a detection mechanism; the initial position is well adjusted, each scale amount is calibrated, and the adjustment of the production amount is not influenced even if the leakage occurs, because the leaked auxiliary material 6 also leaks into the polymerization liquid pipeline 8;
(2) adjusting the calibrated device to a closed state, namely completely staggering the notch 4 on the cylinder 3 and the nozzle 2 on the rotating shaft 1 to prevent impurities from falling into the nozzle 2 to influence the adjustment of the nozzle 2, and installing the device on a polymer liquid pipeline 8;
(3) the servo motor 23 is interlocked to the delivery pump of the polymerization liquid pipeline 8, and the output quantity of a metering pump (the rotating speed of a gear pump) and the adjusting angle of the device are interlocked to adjust in real time, so that the aim of production adjustment can be fulfilled;
(4) the speed of the servo motor 23 is adjusted, and the proportion adjustment of the feeding amount of the auxiliary material 6 and the flow speed of the polymerization liquid can be realized: the edge of the opening 4 of the cylinder 3 is coincided with the edge of the hole of the nozzle 2 on the rotating shaft 1, the calculation is started from zero flow, and the flow of the auxiliary material 6 is adjusted by adjusting the rotating angle of the nozzle 2 through the matching of the servo motor 23 and the servo reducer 22.
The parts of the device are finish machining parts, the purpose is to accurately adjust the flow and the error of the auxiliary material 6, the outer surface of the cylinder 3 is polished to a mirror surface, and the resistance and the gel between the outer surface and the pipeline medium 5 can be reduced. The nozzle 2 is formed by machining, the machining precision requirement is high, the nozzle 2 can be prevented from being blocked and causing leakage when the barrel 3 rotates, if the leakage is large, the metering of the auxiliary material 6 is influenced, the size of the hole can be reasonably designed according to the capacity of the polymer liquid, and the requirement on production can be met. Rectangular hole on the nozzle 2 is symmetrical structure, and in the accommodation process, 6 variable quantities of auxiliary material are linear trend, and the control of the measurement and the volume of being convenient for, under servo motor 23 drive, export for rotation axis 1 through drive servo speed reducer 22 and rotate, make the opening 4 dislocation of nozzle 2 and barrel 3 alternately form the hole that 6 flows of auxiliary material, during 6 flows to polymerization liquid pipeline 8 through the hole that misplaces of auxiliary material.
The device is arranged on the polymerization liquid pipeline 8, occupies small space, can be vertically arranged and easily horizontally arranged, and has wider installation range. The device has simple structure, lower manufacturing cost and convenient operation, the adjustment of the input quantity of the auxiliary material 6 is easily realized by adjusting the rotating speed of the rotating shaft 1, and the precise adjustment of the ratio of the polymerization liquid to the auxiliary material 6 is realized by the interlocking control of the driving mechanism of the rotating shaft 1 and the driving mechanism of the polymerization liquid delivery pump; the device has no buffer zone, and only one layer of pipe is arranged between the auxiliary material 6 and the polymerization solution, so that the device is easy to adjust and control, can be adjusted in real time, and cannot generate hysteresis influence, thereby not influencing the quality and stability of products in production; this device only need when stopping at every turn to inspect the service behavior of nozzle 2 and packing box I7 and packing box II 16, when servo motor 23 or servo speed reducer 22 broke down, this device easily still can manually rotate rotation axis 1 and realize adjusting, has reduced the influence that causes production when maintaining and repairing. The device can also be designed according to the production working condition to realize the adjustable quantity, namely, the size of the gap of the nozzle 2 is changed. The device is wide in application range, can be used in carbon fiber production, can also be used in various industries such as pharmacy and chemical industry, can be in a gas state or a liquid state as auxiliary materials, can produce materials in three forms of a gas state, a liquid state and a solid state, and greatly expands the application range of the device.
However, the above description is only exemplary of the present invention, and the scope of the present invention should not be limited thereby, and the replacement of the equivalent components or the equivalent changes and modifications made according to the protection scope of the present invention should be covered by the claims of the present invention.
Claims (7)
1. The carbon fiber polymerization liquid auxiliary material injection device is characterized by comprising a polymerization liquid pipeline and a cylinder body, wherein the upper portion of the cylinder body is fixed in the polymerization liquid pipeline, a rotating shaft is arranged in the cylinder body, the cylinder body and the rotating shaft are of a concentric structure, the lower end of the rotating shaft is connected with a driving mechanism, the rotating shaft can rotate in the cylinder body under the driving of the driving mechanism, an opening is formed in the cylinder body, a nozzle is arranged on the rotating shaft, the nozzle and the opening are arranged in the polymerization liquid pipeline, the size of the opening is the same as that of the nozzle, the opening can be coincided with the shape of the nozzle by rotating the rotating shaft, an auxiliary material supply pipeline is connected to the rotating shaft, the pressure of the auxiliary material supply pipeline is greater than the pressure in the polymerization liquid pipeline, the rotating shaft is a hollow shaft, and a gap between the polymerization liquid pipeline and the cylinder body, And sealing structures are arranged below the rotating shafts.
2. The carbon fiber polymerization liquid auxiliary material injection device according to claim 1, wherein a connecting flange is arranged at the lower part of the polymerization liquid pipeline, a pipeline flange is arranged below the connecting flange, the sealing structure comprises a sealing structure I and a sealing structure II, the sealing structure I is positioned between the polymerization liquid pipeline and the cylinder body, the sealing structure II is positioned below the rotating shaft, the sealing structure I is provided with a packing I, the packing I is arranged in a packing box I, and the pipeline flange fixes the packing box I in the connecting flange; the sealing structure II comprises a packing II and a packing gland, the packing II is arranged in a packing box II, and the packing gland fixes the packing box II in the pipeline flange.
3. The carbon fiber polymerization liquid auxiliary material injection device according to claim 2, wherein the driving mechanism comprises a servo motor and a servo reducer, the servo motor is located below the servo reducer, the servo reducer is provided with an output shaft, the output shaft is connected with the rotating shaft, the reducer is provided with a reducer flange, and the reducer flange is connected with the packing gland.
4. The carbon fiber polymerization liquid auxiliary material injection device according to claim 1, wherein a delivery pump is provided on the polymerization liquid pipe.
5. The carbon fiber polymerization liquid auxiliary material injection device according to claim 1, wherein the rotating shaft and the cylinder are in clearance fit.
6. The carbon fiber polymerization liquid auxiliary material injection device according to claim 1, wherein the nozzle is a combination of a plurality of rectangular holes, and the rectangular holes are arranged in two rows in the axial direction of the rotating shaft.
7. The carbon fiber polymerization liquid auxiliary material injection method applied to any one of claims 1 to 6 is characterized by comprising the following specific steps:
(1) before use, calibrating the device;
(2) adjusting the calibrated device to a closed state, namely completely staggering the opening on the cylinder and the nozzle on the rotating shaft, and installing the device on a polymerization liquid pipeline;
(3) interlocking a servo motor with a driving mechanism of a delivery pump to realize synchronous control;
(4) the speed of the servo motor is adjusted to realize the adjustment of the ratio of the auxiliary material input quantity to the flow speed of the polymer liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210001635.8A CN114259944B (en) | 2022-01-04 | 2022-01-04 | Carbon fiber polymerization liquid auxiliary material injection method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210001635.8A CN114259944B (en) | 2022-01-04 | 2022-01-04 | Carbon fiber polymerization liquid auxiliary material injection method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114259944A true CN114259944A (en) | 2022-04-01 |
| CN114259944B CN114259944B (en) | 2023-09-19 |
Family
ID=80832317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210001635.8A Active CN114259944B (en) | 2022-01-04 | 2022-01-04 | Carbon fiber polymerization liquid auxiliary material injection method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114259944B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2180321Y (en) * | 1993-11-30 | 1994-10-26 | 杨木苍 | Liquid feeding mechanism for high-speed mixing machine |
| FR2792852A1 (en) * | 1999-04-30 | 2000-11-03 | Bp Chemicals Snc | Spring nozzle for injecting condensed liquid into polymerisation reactor comprises inlet pipe and sleeve with orifices sliding inside and at pipe end returned by spring |
| CN201779263U (en) * | 2010-09-07 | 2011-03-30 | 中国铝业股份有限公司 | Filling material sealing device of rotating shaft |
| CN206701559U (en) * | 2016-09-28 | 2017-12-05 | 洛阳德明石化设备有限公司 | A kind of liquid-injection equipment that can be dismantled online |
| CN207206820U (en) * | 2017-09-20 | 2018-04-10 | 天津三瑞塑胶制品有限公司 | A kind of batch mixer for EVA adhesive film production |
| CN208311550U (en) * | 2018-06-07 | 2019-01-01 | 超达阀门集团股份有限公司 | It is a kind of can to pressure system injected media and can on-line rinsing and maintenance device |
| CN215233946U (en) * | 2021-03-02 | 2021-12-21 | 南通贝特医药机械有限公司 | Mixing device for adding liquid during mixing |
-
2022
- 2022-01-04 CN CN202210001635.8A patent/CN114259944B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2180321Y (en) * | 1993-11-30 | 1994-10-26 | 杨木苍 | Liquid feeding mechanism for high-speed mixing machine |
| FR2792852A1 (en) * | 1999-04-30 | 2000-11-03 | Bp Chemicals Snc | Spring nozzle for injecting condensed liquid into polymerisation reactor comprises inlet pipe and sleeve with orifices sliding inside and at pipe end returned by spring |
| CN201779263U (en) * | 2010-09-07 | 2011-03-30 | 中国铝业股份有限公司 | Filling material sealing device of rotating shaft |
| CN206701559U (en) * | 2016-09-28 | 2017-12-05 | 洛阳德明石化设备有限公司 | A kind of liquid-injection equipment that can be dismantled online |
| CN207206820U (en) * | 2017-09-20 | 2018-04-10 | 天津三瑞塑胶制品有限公司 | A kind of batch mixer for EVA adhesive film production |
| CN208311550U (en) * | 2018-06-07 | 2019-01-01 | 超达阀门集团股份有限公司 | It is a kind of can to pressure system injected media and can on-line rinsing and maintenance device |
| CN215233946U (en) * | 2021-03-02 | 2021-12-21 | 南通贝特医药机械有限公司 | Mixing device for adding liquid during mixing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114259944B (en) | 2023-09-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Elbing et al. | Flow-induced degradation of drag-reducing polymer solutions within a high-Reynolds-number turbulent boundary layer | |
| NZ250706A (en) | Fluid metering system; main pump and auxiliary pump for different fluids, connected by means for adjusting ratio of fluids pumped | |
| CA2554206C (en) | Medium, method and system for proving a turbine meter | |
| CN109827640A (en) | A kind of metal floater flowmeter viscosity correction device and bearing calibration | |
| CN114259944A (en) | Carbon fiber polymerization liquid auxiliary material injection method and device thereof | |
| CN112526160B (en) | Micro-flow velocity measuring device, thermal hydraulic experiment table with same and method | |
| CN112414878A (en) | Solid-liquid two-phase flow pipe erosion wear test device | |
| CN207935181U (en) | A kind of mechanical seal rinsing system | |
| KR102206711B1 (en) | Dopant Gas Mixing System | |
| CN105784341B (en) | A kind of method of the standard set-up and verification of permanent flow valve flow and differential pressure verification | |
| CN213180153U (en) | Liquid turbine flowmeter current limiting structure | |
| CN114542483A (en) | Calibration device for flow coefficient of balance hole of centrifugal pump impeller | |
| CN211179004U (en) | Experimental device for testing influence of reducer pipe on full pipe rate of filling vertical pipe | |
| CN115031924A (en) | Combined cavitation generation and observation device | |
| CN1078305A (en) | Twin fulcrum target type flow sensor | |
| RU2745650C1 (en) | Bench for testing shaftless pump impeller elements | |
| CN112030669A (en) | Continuous asphalt mixture plant-mixing hot recycling combined equipment and control method | |
| CN108194385B (en) | Device and method for testing wear performance of two-phase flow fluid machinery flow-through part | |
| CN219842008U (en) | High-precision water flow metering device | |
| CN106969164B (en) | Novel characteristic-variable metering V-shaped ball valve and metering method thereof | |
| CN219757412U (en) | Pipe section type Li Tuoba flowmeter | |
| CN214598849U (en) | Online liquid preparation system | |
| CN217716505U (en) | Vortex shedding flowmeter is used in production of type of protecting slump polycarboxylate water reducing agent | |
| CN221015586U (en) | Anti-sinking homogenizing tank and stirring shaft centering anti-swing mechanism thereof | |
| CN118111861A (en) | Method and device for measuring density of cement slurry for grouting engineering |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20230329 Address after: No. 88, Xingye Road, Rongcheng City, Weihai City, Shandong Province, 264300 Applicant after: Shandong Yongcheng New Material Co.,Ltd. Address before: No. 88, Xingye Road, Rongcheng City, Weihai City, Shandong Province, 264300 Applicant before: Rongcheng Carbon Fiber Technology Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |