CN119291165A - A concrete degradation test device - Google Patents
A concrete degradation test device Download PDFInfo
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- CN119291165A CN119291165A CN202411338902.6A CN202411338902A CN119291165A CN 119291165 A CN119291165 A CN 119291165A CN 202411338902 A CN202411338902 A CN 202411338902A CN 119291165 A CN119291165 A CN 119291165A
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- mounting cylinder
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/38—Concrete; Lime; Mortar; Gypsum; Bricks; Ceramics; Glass
- G01N33/383—Concrete or cement
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L1/00—Enclosures; Chambers
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Abstract
The invention provides a concrete degradation test device, which is characterized in that a control panel is matched with a temperature control mechanism, a ventilation mechanism and a water supply pipe with a plurality of spray heads to simulate the temperature, ventilation conditions, rain wash and other environments of a concrete test block, a driving mechanism drives a mounting cylinder to rotate at a drainage groove, a pump body drives a plurality of chambers of the mounting cylinder to be in a negative pressure state through a suction pipe and a plurality of branch pipes, the chambers pump water in a test box through the mounting cylinder, impurities in the water are adsorbed on the outer side of the mounting cylinder under the negative pressure effect of the chambers, and when the impurities rotate to the back of the test box along with the mounting cylinder, the adjusting mechanism drives an adjusting block to be close to and block the branch pipes at the positions, so that the adsorption effect on the impurities is eliminated, and a cleaning structure is matched to clean the impurities at a filter hole, so that the impurities at the mounting cylinder and the drainage groove can be effectively removed, the labor cost is saved, and the water recovery work and the normal operation of the whole test work are ensured.
Description
Technical Field
The invention relates to the technical field of concrete degradation research, in particular to a concrete degradation test device.
Background
Concrete surface defects are common problems in the engineering field, including exposed ribs, honeycombs, holes, slag inclusions, porosity, cracks, and the like. These drawbacks not only affect the aesthetics but, more seriously, may reduce the structural performance and durability of the concrete, posing a threat to engineering safety. Therefore, the research on the cause and control of the concrete surface defects is significant. The cause of the surface defects of the concrete is complex and various, and relates to various aspects of materials, construction, environment and the like. The material factors comprise the mixing proportion of concrete, the property of aggregate, the quality of cement and the like, the construction factors relate to the links of stirring, transporting, pouring, vibrating, curing and the like of the concrete, and the environment factors comprise the external conditions such as temperature, humidity, wind speed and the like. It is critical to investigate how these factors work together to cause defects to occur, and to prevent and treat defects. Measures for preventing the defects of the concrete surface need to penetrate through the whole construction process. For example, optimizing the mixing proportion of concrete, selecting proper aggregate to ensure the quality of cement, controlling the stirring and transportation of concrete during construction, arranging the pouring sequence reasonably to ensure sufficient vibration and avoid vibration leakage, and maintaining concrete at proper temperature and humidity to avoid premature demolding or freezing. The cause and control of the defects on the concrete surface are researched, and the key factors influencing the defects are deeply understood, so that effective prevention and treatment strategies are provided, and the quality and safety of concrete engineering are improved. The research not only has direct guiding significance on engineering practice, but also can promote the development of related theory and contribute strength to the progress of concrete material science. The mechanism and law of the deterioration of the properties of the marine concrete are key scientific problems of the physical guarantee research of the infrastructure of reinforced concrete, cross-sea bridges and the like and major marine engineering structures. However, at present, no equipment capable of comprehensively simulating the service environment of concrete exists, the existing equipment cannot simulate the influence of various environments on the degradation of concrete, when the existing equipment is used for simulating the flushing of water bodies with saliency such as rainwater, seawater and the like on the concrete, the flushed water bodies are usually required to be filtered and recycled, more impurities exist in the flushed water bodies, the impurities are easy to adhere to the mounting cylinder, the mounting cylinder is plugged after long-time use, the filtering performance of the mounting cylinder and the normal recycling work of the water bodies are influenced, the whole cleaning process is usually required to be stopped for manual cleaning, and the test process is delayed.
Disclosure of Invention
The invention aims to solve the problems by providing a concrete degradation test device aiming at the defects in the prior art.
The invention provides a concrete degradation test device, comprising:
The test box is provided with a control panel, a temperature control mechanism, a ventilation mechanism, a water supply pipe and a drainage tank, a plurality of concrete test blocks are placed in the test box, and a plurality of spray heads for spraying water to wash the concrete test blocks are arranged on the water supply pipe;
The test box is provided with a driving mechanism for driving the mounting cylinder to rotate, the periphery of the mounting cylinder is provided with a plurality of filtering holes, the inner cavity of the mounting cylinder is circumferentially provided with a plurality of partition plates, the inner cavity of the mounting cylinder is divided into a plurality of chambers by the plurality of partition plates, the side surface of the mounting cylinder is provided with a mounting plate, the mounting plate is provided with a plurality of branch pipes, the branch pipes are aligned with the chambers one by one and are mutually communicated, the mounting plate is provided with a connecting pipe communicated with the branch pipes, the connecting pipe is rotationally provided with a suction pipe, the suction pipe is provided with a pump body, the mounting plate is provided with a plurality of adjusting blocks in a moving manner, the adjusting blocks are positioned at the branch pipes and are used for adjusting connectivity of the branch pipes, and the adjusting blocks are provided with elastic pieces for driving the adjusting blocks to be far away from the branch pipes;
The adjusting mechanism is used for driving the adjusting block which rotates along with the mounting cylinder to the back of the test box to approach and block the branch pipe;
The cleaning mechanism is arranged on the back of the test box and used for cleaning the outer side of the mounting cylinder.
Preferably, the elastic member is an extension spring connected with the adjusting block and used for driving the adjusting block away from the branch pipe.
Preferably, the adjusting mechanism comprises a round frame and an arc plate, each adjusting block is provided with an adjusting rod, the round frame and the mounting cylinder are coaxially arranged, the elastic piece drives the adjusting blocks to elastically abut against the round frame or the arc plate, the arc plate is arranged on the inner side of the round frame and close to the back of the test box, and the arc plate is used for pushing the adjusting rods in a matching manner in the rotating process of the mounting cylinder so as to drive the adjusting blocks to seal the branch pipes.
Preferably, the arc both sides all are provided with the confession adjust the transition landslide of pole butt, be provided with on the arc and confession adjust the arc slide of pole butt, the transition landslide is used for cooperating the elastic component to order about to adjust the pole and drive the regulating block is close to or keeps away from the branch pipe, the arc slide is used for keeping the regulating block shutoff the state of branch pipe.
Preferably, the height of the mounting cylinder is greater than the height of the drain tank.
Preferably, the driving mechanism is a servo motor, and the servo motor is in transmission connection with the mounting cylinder and is used for driving the mounting cylinder to rotate.
Preferably, the temperature control mechanism comprises an electric heating tube and a temperature sensor, and the control panel is respectively and electrically connected with the temperature sensor and the electric heating tube.
Preferably, the ventilation mechanism is an electric fan, and the electric fan is electrically connected with the control panel.
Preferably, the cleaning mechanism comprises a collecting box, a scraping plate and a torsion spring, wherein the collecting box is arranged on the back of the test box, the scraping plate is rotatably installed on the collecting box, and the torsion spring is installed on the scraping plate and used for driving one end of the scraping plate to elastically abut against the installation cylinder.
Compared with the prior art, the invention has the following beneficial effects:
The temperature, ventilation condition and environmental simulation such as rain wash to concrete test block are realized to the delivery pipe through control panel cooperation control by temperature change mechanism, ventilation mechanism, have a plurality of shower nozzle, drive the installation section of thick bamboo in water drainage tank department rotation through actuating mechanism, the pump body drives a plurality of cavity department of installation section of thick bamboo through suction tube and a plurality of branch pipe and is negative pressure state, a plurality of cavity is through the water in the installation section of thick bamboo extraction test case, receive the negative pressure effect of cavity department, debris in the water is adsorbed in the installation section of thick bamboo outside, debris rotates to the test case back along with the installation section of thick bamboo, adjustment mechanism drives the regulating block and is close to and shutoff branch pipe of this department, remove the adsorption to debris, cooperation clearance structure clearance filter pore department's debris, can effectively get rid of the automatic clearance of installation section of thick bamboo and water drainage tank department, save the cost of labor, guarantee that water recovery work and whole test work normally go on.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only preferred embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an external structure of an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating an internal structure of an embodiment of the present invention;
FIG. 3 is a schematic view of a cleaning mechanism according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a driving mechanism according to an embodiment of the present invention;
FIG. 5 is a schematic view showing the structures of the branch pipe, the connecting pipe and the suction pipe according to an embodiment of the present invention;
FIG. 6 is a schematic view of an adjusting mechanism according to an embodiment of the present invention;
fig. 7 is an enlarged view at a in fig. 6.
In the figure, 1-test chamber, 11-control panel, 12-temperature control mechanism, 121-electrothermal tube, 122-temperature sensor, 13-ventilation mechanism, 14-water supply pipe, 15-drainage tank, 2-mounting cylinder, 21-filter hole, 22-baffle, 23-chamber, 3-driving mechanism, 4-mounting plate, 41-branch pipe, 42-connecting pipe, 5-regulating block, 51-regulating rod, 6-elastic piece, 7-regulating mechanism, 71-round frame, 72-arc plate, 721-transitional slide, 722-arc slide, 8-cleaning mechanism, 81-collecting box, 82-scraper, 83-torsion spring, 9-suction pipe and 91-pump body.
Detailed Description
Reference will now be made in detail to the present embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present invention, but not to limit the scope of the present invention.
Example 1:
referring to fig. 1 to 7, the present invention provides a concrete degradation test apparatus
The test box 1, the control panel 11, the temperature control mechanism 12, the ventilation mechanism 13, the water supply pipe 14 and the drainage tank 15 are arranged on the test box 1, a plurality of concrete test blocks are placed in the test box 1, and a plurality of spray heads for spraying water to wash the concrete test blocks are arranged on the water supply pipe 14;
The water draining tank 15 is rotationally provided with a mounting cylinder 2, the test box 1 is provided with a driving mechanism 3 for driving the mounting cylinder 2 to rotate, the periphery of the mounting cylinder 2 is provided with a plurality of filtering holes 21, the inner cavity of the mounting cylinder 2 is circumferentially provided with a plurality of baffle plates 22, the inner cavity of the mounting cylinder 2 is divided into a plurality of chambers 23 by the plurality of baffle plates 22, the side surface of the mounting cylinder 2 is provided with a mounting plate 4, the mounting plate 4 is provided with a plurality of branch pipes 41, the plurality of branch pipes 41 are aligned with the plurality of chambers 23 and are mutually communicated, the mounting plate 4 is provided with a connecting pipe 42 communicated with the plurality of branch pipes 41, the connecting pipe 42 is rotationally provided with a suction pipe 9, the suction pipe 9 is provided with a pump body 91, the mounting plate 4 is movably provided with a plurality of regulating blocks 5, the regulating blocks 5 are positioned at the branch pipes 41 and are used for regulating the connectivity of the branch pipes 41, the regulating blocks 5 are provided with elastic pieces 6, and the elastic pieces 6 are used for driving the regulating blocks 5 to be far away from the branch pipes 41;
The adjusting mechanism 7 is used for driving the adjusting block 5 which rotates along with the mounting cylinder 2 to the back of the test box 1 to approach and block the branch pipe 41;
The cleaning mechanism 8 is arranged on the back of the test box 1 and used for cleaning the outer side of the mounting cylinder 2.
The temperature, ventilation condition, rain wash and other environmental simulation of the concrete test block are realized through the control panel 11 matched with the temperature control mechanism 12, the ventilation mechanism 13 and the water supply pipe 14 with a plurality of spray heads, the installation cylinder 2 is driven to rotate at the drainage groove 15 through the driving mechanism 3, the pump body 91 drives the plurality of chambers 23 of the installation cylinder 2 to be in a negative pressure state through the suction pipe 9 and the plurality of branch pipes 41, the plurality of chambers 23 pump water in the test box 1 through the installation cylinder 2, impurities in the water are adsorbed on the outer side of the installation cylinder 2 under the negative pressure effect of the chambers 23, and when the impurities rotate to the back of the test box 1 along with the installation cylinder 2, the adjusting mechanism 7 drives the adjusting block 5 to be close to and block the branch pipes 41 at the positions, so that the adsorption effect on the impurities is eliminated, the impurities at the positions of the filtering holes 21 are cleaned through the matching cleaning structure, the impurities at the positions of the installation cylinder 2 and the drainage groove 15 can be effectively removed, the automatic cleaning of the impurities is realized, the labor cost is saved, and the water recovery work and the normal running of the whole test work are ensured. Wherein, the water supply pipe 14 is powered by a water pump, and the control panel 11 is respectively electrically connected with the temperature control mechanism 12, the ventilation mechanism 13 and the driving mechanism 3.
Example 2:
referring to fig. 1 to 7, in combination with the technical solution of embodiment 1, in this embodiment, the elastic member 6 is an extension spring, which is connected to the adjusting block 5 and is used to drive the adjusting block 5 away from the branch pipe 41.
Specifically, the adjusting mechanism 7 includes a circular frame 71 and an arc plate 72, each adjusting block 5 is provided with an adjusting rod 51, the circular frame 71 and the mounting cylinder 2 are coaxially arranged, the elastic piece 6 drives the adjusting blocks 5 to elastically abut against the circular frame 71 or the arc plate 72, the arc plate 72 is arranged on the inner side of the circular frame 71 and is close to the back of the test box 1, and the arc plate 72 is used for pushing the adjusting rods 51 to drive the adjusting blocks 5 to block the branch pipes 41 in cooperation with the rotating process of the mounting cylinder 2.
Specifically, the two sides of the arc plate 72 are both provided with a transitional slide 721 for the adjustment rod 51 to abut, the arc plate 72 is provided with an arc slide 722 for the adjustment rod 51 to abut, the transitional slide 721 is used for driving the adjustment rod 51 to drive the adjustment block 5 to approach or depart from the branch pipe 41 in cooperation with the elastic piece 6, and the arc slide 722 is used for keeping the state that the adjustment block 5 blocks the branch pipe 41.
Working principle:
When the installation cylinder 2 drives sundries to rotate to the back of the test box 1 and continuously rotates, the adjusting rod 51 moves from the inner side of the round frame 71 to the arc-shaped slide way 722 through the transitional landslide 721, the adjusting rod 51 drives the adjusting block 5 to approach the branch pipe 41, when the adjusting rod 51 moves to the arc-shaped slide way 722 and continuously moves along the arc-shaped slide way 722, the adjusting rod 51 does not move relative to the installation disc 4, namely, the adjusting block 5 keeps the state of plugging the branch pipe 41, the chamber 23 corresponding to the plugged branch pipe 41 is released from the negative pressure state, sundries at the position are not adsorbed and are matched with the cleaning mechanism 8 to separate from the installation cylinder 2, the sundries are cleaned, after the sundries are cleaned, the installation cylinder 2 continuously drives the chamber 23 to rotate towards the drainage groove 15, the adjusting rod 51 moves from the arc-shaped slide way 722 to the inner side of the round frame 71 through the transitional landslide 721, the elastic force of the elastic piece 6 drives the adjusting block 5 to be far away from the branch pipe 41, the pump body 41 is released, the suction effect of the chamber 23 is kept to be in the negative pressure state of the plugging the branch pipe 41, and the chamber 23 is enabled to be in the negative pressure state when the chamber 23 rotates to the drainage groove 15, namely, the automatic pumping operation can be carried out, the driving mechanism 3, the installation cylinder 7, the elastic piece 7 and the installation cylinder 2 are matched with the negative pressure state of the chamber 2 are matched with the installation cylinder 2, and the automatic cleaning mechanism 2.
Specifically, the height of the mounting cylinder 2 is greater than the height of the drain tank 15. Because the height of the mounting cylinder 2 is greater than that of the water drainage groove 15, after any chamber 23 on the mounting cylinder 2 pumps water at the water drainage groove 15, the chamber 23 does not pump water at the water drainage groove 15 in the process of rotating upwards along with the mounting cylinder 2 and leaving the water surface at the water drainage groove 15, the pump body 91 is matched with the suction pipe 9 to pump water in the chamber 23, and then the chamber 23 moves to the back of the test box 1 to be matched with the cleaning mechanism 8 and the adjusting mechanism 7 to clean impurities, so that water flowing out from the chamber 23 in the cleaning process can be reduced, and the recycling and filtering of the water are improved.
Example 3:
Referring to fig. 1 to 7, in the present embodiment, the driving mechanism 3 is a servo motor, which is in transmission connection with the mounting cylinder 2 and is used for driving the mounting cylinder 2 to rotate, in combination with the technical solutions of embodiment 1 and embodiment 2.
Specifically, the temperature control mechanism 12 includes an electrothermal tube 121 and a temperature sensor 122, and the control panel 11 is electrically connected to the temperature sensor 122 and the electrothermal tube 121, respectively.
Specifically, the ventilation mechanism 13 is an electric fan, and the electric fan is electrically connected to the control panel 11.
Specifically, the cleaning mechanism 8 includes a collection box 81, a scraper 82, and a torsion spring 83, the collection box 81 is disposed on the back of the test box 1, the scraper 82 is rotatably mounted on the collection box 81, and the torsion spring 83 is mounted on the scraper 82 and is used for driving one end of the scraper 82 to elastically abut against the mounting cylinder 2.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Many possible variations and modifications of the disclosed technology can be made by anyone skilled in the art, or equivalent embodiments with equivalent variations can be made, without departing from the scope of the disclosed technology. Therefore, any modification, equivalent variation and modification of the above embodiments according to the technology of the present invention fall within the protection scope of the present invention.
Claims (9)
1.A concrete degradation test apparatus, comprising:
The test box is provided with a control panel, a temperature control mechanism, a ventilation mechanism, a water supply pipe and a drainage tank, a plurality of concrete test blocks are placed in the test box, and a plurality of spray heads for spraying water to wash the concrete test blocks are arranged on the water supply pipe;
The test box is provided with a driving mechanism for driving the mounting cylinder to rotate, the periphery of the mounting cylinder is provided with a plurality of filtering holes, the inner cavity of the mounting cylinder is circumferentially provided with a plurality of partition plates, the inner cavity of the mounting cylinder is divided into a plurality of chambers by the plurality of partition plates, the side surface of the mounting cylinder is provided with a mounting plate, the mounting plate is provided with a plurality of branch pipes, the branch pipes are aligned with the chambers one by one and are mutually communicated, the mounting plate is provided with a connecting pipe communicated with the branch pipes, the connecting pipe is rotationally provided with a suction pipe, the suction pipe is provided with a pump body, the mounting plate is provided with a plurality of adjusting blocks in a moving manner, the adjusting blocks are positioned at the branch pipes and are used for adjusting connectivity of the branch pipes, and the adjusting blocks are provided with elastic pieces for driving the adjusting blocks to be far away from the branch pipes;
The adjusting mechanism is used for driving the adjusting block which rotates along with the mounting cylinder to the back of the test box to approach and block the branch pipe;
The cleaning mechanism is arranged on the back of the test box and used for cleaning the outer side of the mounting cylinder.
2. The concrete degradation test apparatus according to claim 1, wherein:
the elastic piece is an extension spring, and the extension spring is connected with the adjusting block and used for driving the adjusting block to be far away from the branch pipe.
3. The concrete degradation test apparatus according to claim 1, wherein:
the adjusting mechanism comprises a round frame and an arc plate, each adjusting block is provided with an adjusting rod, the round frame and the mounting cylinder are coaxially arranged, the elastic piece drives the adjusting blocks to elastically abut against the round frame or the arc plate, the arc plate is arranged on the inner side of the round frame and close to the back of the test box, and the arc plate is used for pushing the adjusting rods in a matching manner in the rotating process of the mounting cylinder so as to drive the adjusting blocks to seal the branch pipes.
4. A concrete degradation test apparatus according to claim 3, wherein:
The arc-shaped plates are provided with transition landslide for the butt of the adjusting rods, the arc-shaped plates are provided with arc-shaped slide ways for the butt of the adjusting rods, the transition landslide is used for driving the adjusting rods to drive the adjusting blocks to be close to or far away from the branch pipes by matching with the elastic pieces, and the arc-shaped slide ways are used for keeping the state that the adjusting blocks block the branch pipes.
5. A concrete degradation test apparatus according to claim 3, wherein:
The height of the mounting cylinder is larger than that of the drainage groove.
6. The concrete degradation test apparatus according to claim 1, wherein:
The driving mechanism is a servo motor, and the servo motor is in transmission connection with the mounting cylinder and is used for driving the mounting cylinder to rotate.
7. The concrete degradation test apparatus according to claim 1, wherein:
The temperature control mechanism comprises an electric heating tube and a temperature sensor, and the control panel is respectively and electrically connected with the temperature sensor and the electric heating tube.
8. The concrete degradation test apparatus according to claim 1, wherein:
The ventilation mechanism is an electric fan, and the electric fan is electrically connected with the control panel.
9. The concrete degradation test apparatus according to claim 1, wherein:
the cleaning mechanism comprises a collecting box, a scraping plate and a torsion spring, wherein the collecting box is arranged on the back of the test box, the scraping plate is rotatably installed on the collecting box, and the torsion spring is installed on the scraping plate and used for driving one end of the scraping plate to elastically abut against the installation cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411338902.6A CN119291165B (en) | 2024-09-25 | 2024-09-25 | Concrete degradation test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411338902.6A CN119291165B (en) | 2024-09-25 | 2024-09-25 | Concrete degradation test device |
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| Publication Number | Publication Date |
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| CN119291165A true CN119291165A (en) | 2025-01-10 |
| CN119291165B CN119291165B (en) | 2025-10-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202411338902.6A Active CN119291165B (en) | 2024-09-25 | 2024-09-25 | Concrete degradation test device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5093001A (en) * | 1988-05-27 | 1992-03-03 | Mitsui Petrochemical Industries, Ltd. | Method for recovering crystals from slurry |
| US20120285867A1 (en) * | 2011-05-11 | 2012-11-15 | Elisabeth Schmidt | Filter device, method for its operation and use thereof |
| CN208626763U (en) * | 2018-07-21 | 2019-03-22 | 石家庄市普力制药有限公司 | A kind of filtration system |
| CN208999239U (en) * | 2018-10-15 | 2019-06-18 | 长安大学 | A rain scouring test device for asphalt mixture surface layer under the action of multi-factor coupling |
| CN110743235A (en) * | 2019-11-11 | 2020-02-04 | 衡阳凯美科化工有限公司 | Rotary drum vacuum filter for alkali making filtration |
-
2024
- 2024-09-25 CN CN202411338902.6A patent/CN119291165B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5093001A (en) * | 1988-05-27 | 1992-03-03 | Mitsui Petrochemical Industries, Ltd. | Method for recovering crystals from slurry |
| US20120285867A1 (en) * | 2011-05-11 | 2012-11-15 | Elisabeth Schmidt | Filter device, method for its operation and use thereof |
| CN208626763U (en) * | 2018-07-21 | 2019-03-22 | 石家庄市普力制药有限公司 | A kind of filtration system |
| CN208999239U (en) * | 2018-10-15 | 2019-06-18 | 长安大学 | A rain scouring test device for asphalt mixture surface layer under the action of multi-factor coupling |
| CN110743235A (en) * | 2019-11-11 | 2020-02-04 | 衡阳凯美科化工有限公司 | Rotary drum vacuum filter for alkali making filtration |
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| CN119291165B (en) | 2025-10-17 |
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