Pervious concrete workability testing method and testing device

Abstract

The invention relates to the technical field of concrete testing, and discloses a pervious concrete workability testing method and a pervious concrete workability testing device.The pervious concrete workability testing method comprises the steps that a pervious concrete mixture is poured into a stirring barrel, an electric stirrer is started, and the pervious concrete mixture in the stirring barrel is fully and evenly stirred through the electric stirrer; the water-permeable concrete mixture flows out through the flow meter, the timer automatically records the outflow time, the outflow rate is calculated through the control assembly, and the test result is displayed. A pervious concrete mixture in the stirring tank is preliminarily stirred through an electric stirrer, meanwhile, the electric stirrer can drive a sun gear on the outer side to rotate, and the sun gear is in meshing transmission with a planetary gear, so that a feeding rod can be driven to rotate; through rotation of the feeding rod, a pervious concrete mixture can pass through the space between the spiral on the outer side of the feeding rod and the feeding barrel, is thrown out from the top of the feeding barrel and falls into the stirring barrel, so that the operation process of a pervious concrete workability test is simplified.

Description

Technical Field

[0001] The present invention relates to the technical field of concrete testing, and in particular to a method and device for testing the workability of permeable concrete. Background Art

[0002] Permeable concrete has a porous structure similar to honeycombs, so it has good water permeability. The workability of permeable concrete refers to its fluidity and plasticity during the construction process, as well as its mechanical properties after hardening. However, the workability of permeable concrete directly affects its construction quality and final performance. Therefore, a testing device is needed to test the workability of permeable concrete.

[0003] When the existing testing device tests permeable concrete, it generally uses the manual stirring method to stir the concrete first, and then tests the flow rate of the concrete. By manually stirring the permeable concrete mixture and observing its fluidity, uniformity and stability, this method is simple and easy to operate, but it is greatly affected by human factors. When manually stirring, the stirring force and speed of each person may be different. Insufficient stirring force or uneven speed may cause the components such as cement, water, and aggregates in the mixture to not be fully mixed, thus affecting the uniformity and stability of the permeable concrete, resulting in unstable test results, and thus affecting the subsequent test results of the permeable concrete.

[0004] Therefore, the present invention provides a method and device for testing the workability of permeable concrete. Summary of the Invention

[0005] In order to make up for the deficiencies of the prior art and solve at least one of the technical problems proposed in the background art.

[0006] The present invention provides a method for testing the workability of permeable concrete, which is completed through the following steps: S1. Pour the permeable concrete mixture into the mixing barrel, ensuring that the height of the permeable concrete mixture does not exceed two-thirds of the mixing barrel; S2. Start the electric stirrer and set the stirring time to 3 minutes to make the electric stirrer fully stir and mix the permeable concrete mixture inside the mixing barrel evenly; S3. Stop the electric stirrer, open the valve at the bottom of the mixing barrel, and let the permeable concrete mixture flow out through the flow meter; S4. The timer automatically records the outflow time. When the permeable concrete mixture has flowed out, close the valve; S5. Calculate the outflow rate through the control component and display the test result.

[0007] A permeable concrete workability testing device comprises a base and a mixing barrel; a mixing barrel is installed on the top of the base, a valve is fixedly installed on the bottom of the mixing barrel, a flow meter is installed on the bottom of the mixing barrel near the valve, a bracket is fixedly installed on one side of the top of the base, a measuring mechanism is installed on the side of the bracket, a cover plate is installed on the top of the mixing barrel, an electric stirrer is installed inside the cover plate, and a high-efficiency mechanism is installed on the outside of the electric stirrer transmission shaft.

[0008] The high-efficiency mechanism includes a sun gear, a planetary gear, a feeding rod and a feeding barrel. The sun gear is installed on the outside of the electric agitator transmission shaft, and planetary gears are installed on both sides of the top of the cover plate near the sun gear. The sun gear and the planetary gears are meshed for transmission. A feeding rod is installed at the bottom end of the planetary gear, and a feeding barrel is installed on the outside of the feeding rod.

[0009] Preferably, in order to adjust the use level of the device, adjusting feet are installed at the four corners of the bottom of the base.

[0010] Preferably, in order to fix the mixing bucket, a fixing fixture is installed on the top of the base, and the mixing bucket is clamped inside the fixing fixture.

[0011] Preferably, in order to realize the measurement of the flow rate of concrete, the measurement mechanism includes a control component and a timer, the control component is fixedly installed on the side of the bracket, and the timer is fixedly installed on the top of the control component.

[0012] Preferably, in order to achieve a closed state inside the mixing barrel and prevent the external environment from affecting the mixing and testing of the permeable concrete mixture inside the mixing barrel, a transmission assembly is installed inside the bracket, and a cover plate is connected to the outer side of the transmission assembly.

[0013] Preferably, in order to achieve stirring of the permeable concrete mixture inside the mixing barrel and facilitate the later testing of the flow rate of the permeable concrete mixture by the device, the electric stirrer includes a motor, a stirring rod and stirring blades, the motor is fixedly installed on the top of the cover plate, a stirring rod is installed on the output end of the motor through the inside of the cover plate, three groups of stirring blades are installed at equal angles on the bottom of the stirring rod, and a sun gear is fixedly connected to the outside of the stirring rod.

[0014] Preferably, in order to scrape off the permeable concrete mixture adhered to the inner wall of the mixing barrel, an inner gear ring is rotatably installed on the top of the cover plate near the outer side of the planetary gear, a scraper rod is fixedly installed on the bottom of the inner gear ring, and the inner gear ring is meshed with the planetary gear for transmission.

[0015] Preferably, in order to improve the accuracy of the device in testing the flow rate of the permeable concrete mixture, a ring tube is fixedly installed on the outer side of the inner top of the cover plate close to the inner gear ring, and a connecting pipe is installed on the top of the ring tube passing through the inside of the cover plate.

[0016] 1. The beneficial effects of the present invention are as follows: For a workability testing method and testing device for permeable concrete of the present invention, through the combined use of an electric stirrer, a sun gear, a planetary gear, a feeding rod, and a feeding cylinder, the electric stirrer initially stirs the permeable concrete mixture inside the mixing tank. At the same time, the electric stirrer drives the outer sun gear to rotate. The sun gear meshes with the planetary gear for transmission, which can drive the feeding rod to rotate. By the rotation of the feeding rod, the permeable concrete mixture can be promoted to pass between the outer helix of the feeding rod and the feeding cylinder, and be thrown from its top and fall into the interior of the mixing barrel. Under the action of continuous throwing, the permeable concrete mixture is more fully dispersed and mixed, which helps to improve the uniformity and efficiency of stirring, enables the electric stirrer to fully stir the permeable concrete mixture in the mixing barrel, thereby improving the stirring efficiency of the device for the permeable concrete mixture. Moreover, the throwing and stirring method can achieve the required stirring effect in a shorter time, shorten the stirring time, improve production efficiency, thereby simplifying the operation process of the workability test of permeable concrete, improving the stability and accuracy of the test results, reducing equipment costs, and reducing operation time.

[0017] 2. For a workability testing method and testing device for permeable concrete of the present invention, through the combined use of an internal gear ring and a scraping rod, when the planetary gear rotates, the other side meshes with the internal gear ring for transmission, promoting the horizontal rotation of the internal gear ring, and then the moving position of the scraping rod can be changed. By the rotation of the scraping rod, the permeable concrete mixture on the inner wall of the mixing barrel can be scraped off, thereby improving the stirring and mixing effect of the device for the permeable concrete mixture, avoiding the condensation phenomenon caused by the permeable concrete mixture that is not fully fused adhering to the inner wall of the mixing barrel and affecting the later test results. At the same time, by the rotation of the scraping rod, the remaining permeable concrete mixture on the inner wall of the mixing barrel can be scraped off and discharged later, facilitating the later cleaning of the interior of the mixing barrel by the operator.

[0018] 3. For a workability testing method and testing device for permeable concrete of the present invention, through the combined use of a ring pipe and a connecting pipe, by connecting the connecting pipe to an external heating or cooling device, cold air or hot air can be transported to the inside of the scraping rod through the ring pipe and the internal gear ring. When the scraping rod moves inside the mixing barrel, the permeable concrete mixture can be heated or cooled. By adjusting its temperature, the device can simulate the test of the flow rate of the permeable concrete mixture at different temperatures, which can improve the accuracy of the detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a side perspective view of an embodiment of the present invention; Figure 2 is a top perspective view of an embodiment of the present invention; Figure 3It is a schematic diagram of a partial internal structure of the mixing barrel in the present invention; Figure 4 It is a schematic diagram of the structure of the high-efficiency mechanism in the present invention; Figure 5 It is a schematic diagram of a partial internal structure of the cover plate in the present invention; Figure 6 It is a schematic diagram of a partial internal structure of the feeding barrel in the present invention.

[0020] Explanation of reference numerals: 1. Base; 101. Adjusting feet; 2. Bracket; 201. Measuring mechanism; 2011. Control component; 2012. Timer; 202. Transmission component; 3. Fixed fixture; 4. Mixing barrel; 401. Flowmeter; 402. Valve; 5. Electric mixer; 501. Motor; 502. Stirring rod; 503. Stirring blade; 6. High-efficiency mechanism; 601. Sun gear; 602. Planet gear; 603. Feeding rod; 604. Feeding barrel; 7. Cover plate; 701. Ring pipe; 702. Connecting pipe; 8. Internal gear ring; 801. Scraping rod. Detailed implementation manners

[0021] Now, the subject matter described herein will be discussed with reference to exemplary embodiments. It should be understood that discussing these embodiments is only to enable those skilled in the art to better understand and thus implement the subject matter described herein. Without departing from the scope of protection of the content of this specification, changes can be made to the functions and arrangements of the elements discussed. Each example can omit, substitute, or add various processes or components as needed. Additionally, the features described relative to some examples can also be combined in other examples.

[0022] Embodiment 1 The following further elaborates on the technical solution of the present invention in conjunction with the accompanying drawings of the specification and specific embodiments. Please refer to Figures 1 to 6 , a workability testing method for permeable concrete provided by this application. Please pay particular attention to referring to Figure 1 , Figure 2 and Figure 3 , and it is completed through the following steps: S1. Pour the permeable concrete mixture into the mixing barrel 4 to ensure that the height of the permeable concrete mixture does not exceed two-thirds of the mixing barrel 4; S2. Start the electric mixer 5 and set the mixing time to 3 minutes to fully mix the permeable concrete mixture inside the mixing barrel 4 evenly; S3. Stop the electric mixer 5, open the valve 402 at the bottom of the mixing barrel 4, and let the permeable concrete mixture flow out through the flowmeter 401; S4. The timer 2012 automatically records the outflow time. After the permeable concrete mixture has flowed out, the valve 402 is closed. S5. The control component 2011 calculates the outflow rate and displays the test results.

[0023] This application also provides a device for testing the workability of permeable concrete. Please refer specifically to Figure 1 , Figure 3 , Figure 4 and Figure 6 , which includes a base 1 and a mixing barrel 4. The mixing barrel 4 is installed on the top of the base 1. A valve 402 is fixedly installed at the bottom of the mixing barrel 4. A flowmeter 401 is installed at the bottom of the mixing barrel 4 near the bottom of the valve 402. A support 2 is fixedly installed on one side of the top of the base 1. A measuring mechanism 201 is installed on the side of the support 2. A cover plate 7 is installed on the top of the mixing barrel 4. The support 2 is used to support the cover plate 7 on one side. By moving the cover plate 7, the mixing barrel 4 can be in a closed state. An electric stirrer 5 is installed inside the cover plate 7. A high-efficiency mechanism 6 is installed on the outer side of the transmission shaft of the electric stirrer 5.

[0024] The high-efficiency mechanism 6 includes a sun gear 601, planetary gears 602, a feeding rod 603, and a feeding cylinder 604. The sun gear 601 is installed on the outer side of the transmission shaft of the electric stirrer 5. Planetary gears 602 are installed on both sides of the inner top of the cover plate 7 near the sun gear 601. The planetary gears 602 are rotatably arranged on the inner top of the cover plate 7. The sun gear 601 meshes with the planetary gears 602 for transmission. The bottom end of the planetary gear 602 is installed with a feeding rod 603. The outer side of the bottom of the feeding rod 603 is spiral. A feeding cylinder 604 is installed on the outer side of the feeding rod 603. The feeding rod 603 is connected to the feeding cylinder 604 through a rod body, so that there is a feeding gap between the feeding rod 603 and the feeding cylinder 604.

[0025] Specifically, the mixing barrel 4 is used to store the permeable concrete mixture and provide a mixing space for the mixing of the permeable concrete mixture. The electric mixer 5 is used to mix the permeable concrete mixture inside the mixing barrel 4. The high-efficiency mechanism 6 is used to fully mix the permeable concrete mixture and improve the mixing efficiency of the permeable concrete mixture, facilitating the subsequent better flow rate test of the permeable concrete mixture. By pouring the permeable concrete mixture into the mixing barrel 4, the electric mixer 5 is operated to mix the permeable concrete mixture inside the mixing barrel 4. At the same time, when the electric mixer 5 operates, it will drive the outer sun gear 601 to rotate. The sun gear 601 meshes with the planetary gear 602 for transmission, which can drive the feeding rod 603 to rotate. When the feeding rod 603 is located inside the permeable concrete mixture, the rotation of the feeding rod 603 can cause the permeable concrete mixture to pass between the outer helix of the feeding rod 603 and the feeding cylinder 604, be thrown from its top and fall into the inside of the mixing barrel 4. Under the action of continuous throwing of the permeable concrete mixture, the electric mixer 5 fully mixes the permeable concrete mixture inside the mixing barrel 4, thereby improving the mixing efficiency of the device for the permeable concrete mixture. Then, the valve 402 is opened to allow the permeable concrete mixture to flow out through the inside of the flow meter 401. Finally, the measuring mechanism 201 operates to test the flow rate of the permeable concrete mixture.

[0026] Please refer specifically to Figure 1 , and adjusting feet 101 are installed at the four corners of the bottom of the base 1.

[0027] Specifically, in order to adjust the usage level of the device, four groups of adjusting feet 101 are rotatably installed at the four corners of the bottom of the base 1. The adjusting feet 101 are telescopic sleeve-shaped, and personnel can operate and rotate them to adjust their own usage height through the threaded structure of the adjusting feet 101 themselves. By adjusting the usage height of the four groups of adjusting feet 101, the usage level of the device can be adjusted.

[0028] Please refer specifically to Figure 1 , a fixing fixture 3 is installed on the top of the base 1, and a mixing barrel 4 is clamped inside the fixing fixture 3.

[0029] Specifically, in order to fix the mixing barrel 4, the fixing fixture 3 is composed of an electric telescopic rod and an arc-shaped clamping plate. By operating the electric telescopic rod, its moving end can be driven to drive the arc-shaped clamping plate to move, so that the mixing barrel 4 can be fixed on the top of the base 1 through the fixing fixture 3, preventing the mixing barrel 4 from shifting during use and affecting the use of personnel.

[0030] Please refer specifically to Figure 2, the measuring mechanism 201 includes a control component 2011 and a timer 2012. The control component 2011 is fixedly installed on the side of the bracket 2. The control component 2011 includes a display screen and control buttons, which are used to set parameters and display test results. The timer 2012 is fixedly installed on the top of the control component 2011. The timer 2012 is electrically connected to the control component 2011 and is used to record the stirring time and the outflow time.

[0031] Specifically, in order to measure the flow rate of the concrete, the timer 2012 can calculate the time for the permeable concrete mixture to pass through the flowmeter 401, and then the control component 2011 can calculate the outflow rate of the permeable concrete mixture and display the test results.

[0032] Please refer specifically to Figure 1 , a transmission component 202 is installed inside the bracket 2. The transmission component 202 consists of a motor component and a threaded rod. The output end of the motor component is connected to the threaded rod. The threaded rod can be driven to rotate by the motor component. The outside of the transmission component 202 is drivingly connected to a cover plate 7, and the threaded rod is threadedly connected to the cover plate 7.

[0033] Specifically, in order to keep the inside of the mixing barrel 4 in a closed state and prevent the external environment from affecting the mixing and detection of the permeable concrete mixture inside the mixing barrel 4, the transmission component 202 works to rotate and drive the cover plate 7 to move up and down. When the cover plate 7 is located on the surface of the mixing barrel 4, the mixing barrel 4 can be in a closed state, thus preventing the external environment from affecting the mixing and detection of the permeable concrete mixture inside the mixing barrel 4. At the same time, the electric stirrer 5 and the high-efficiency mechanism 6 are driven to move up and down by the transmission component 202 and the cover plate 7, and their use positions inside the mixing barrel 4 can be adjusted. By cooperating with the high-efficiency mechanism 6, the permeable concrete mixture inside the mixing barrel 4 can be better mixed.

[0034] Please refer specifically to Figure 1 and Figure 4 , the electric stirrer 5 includes a motor 501, a stirring rod 502 and stirring blades 503. The motor 501 is fixedly installed on the top of the cover plate 7. The output end of the motor 501 passes through the inside of the cover plate 7 and is installed with the stirring rod 502. The output end of the motor 501 is connected to the stirring rod 502 through a coupling. Three groups of stirring blades 503 are installed at equal angles at the bottom of the stirring rod 502. The distance between the three groups of blades is 10 cm. A sun gear 601 is fixedly connected to the outside of the stirring rod 502.

[0035] Specifically, in order to stir the permeable concrete mixture inside the stirring barrel 4 and facilitate the later testing of the flow rate of the permeable concrete mixture by the device, the motor 501 works, and the output end of the motor 501 drives the stirring rod 502 and the stirring blade 503 to rotate. The permeable concrete mixture inside the stirring barrel 4 can be mixed and stirred by the stirring rod 502 and the stirring blade 503.

[0036] Please refer particularly to Figure 4 , a ring gear 8 is rotatably installed on the inner top of the cover plate 7 near the outer side of the planetary gear 602. A scraping rod 801 is fixedly installed at the bottom of the ring gear 8. The outer wall of the scraping rod 801 is in contact with the inner wall of the stirring barrel 4. The ring gear 8 is in meshing transmission with the planetary gear 602.

[0037] Specifically, in order to scrape off the permeable concrete mixture adhering to the inner wall of the stirring barrel 4, when the planetary gear 602 rotates, the other side will be in meshing transmission with the ring gear 8, prompting the ring gear 8 to rotate horizontally. Then, the moving position of the scraping rod 801 can be changed. The permeable concrete mixture on the inner wall of the stirring barrel 4 can be scraped off by the rotation of the scraping rod 801. Thus, the stirring and mixing effect of the device on the permeable concrete mixture can be improved, and the phenomenon of condensation caused by the permeable concrete mixture that is not fully fused adhering to the inner wall of the stirring barrel 4 can be avoided, which affects the later test results. At the same time, the rotation of the scraping rod 801 can prompt the residual permeable concrete mixture on the inner wall of the stirring barrel 4 to be scraped off and discharged later, facilitating the later cleaning of the inside of the stirring barrel 4 by the worker.

[0038] Please refer particularly to Figure 4 and Figure 5 , a ring pipe 701 is fixedly installed on the inner top of the cover plate 7 near the outer side of the ring gear 8. The ring pipe 701, the ring gear 8, and the scraping rod 801 are all in a cavity state inside, and the interiors of the three penetrate each other. The ring gear 8 is rotatably connected to the inner wall of the ring pipe 701. The top of the ring pipe 701 passes through the inside of the cover plate 7 and is installed with a connecting pipe 702.

[0039] Specifically, in order to improve the accuracy of the flow rate test of the permeable concrete mixture by the device, by connecting the connecting pipe 702 to an external heating or cooling device, cold air or hot air can be transported to the inside of the scraping rod 801 through the inside of the ring pipe 701 and the ring gear 8. When the scraping rod 801 moves inside the stirring barrel 4, the permeable concrete mixture can be heated or cooled. By adjusting its temperature, the device can simulate the test of the flow rate of the permeable concrete mixture at different temperatures, thereby improving the accuracy of its detection results.

[0040] Working principle: Pour the permeable concrete mixture into the mixing barrel 4, with the height of the permeable concrete mixture not exceeding two-thirds of the mixing barrel 4. Then, drive the cover plate 7 to move downward through the operation of the transmission component 202, so that the cover plate 7 is located on the surface of the mixing barrel 4 and the stirring blades 503 are inserted into the interior of the mixing barrel 4. At this time, drive the stirring rod 502 and the stirring blades 503 to rotate through the operation of the motor 501 to mix and stir the permeable concrete mixture inside the mixing barrel 4. At the same time, the rotation of the stirring rod 502 will drive the outer sun gear 601 to rotate. The sun gear 601 meshes with the planetary gear 602 for transmission, which can drive the feeding rod 603 to rotate, prompting the permeable concrete mixture to pass between the outer helix of the feeding rod 603 and the feeding cylinder 604, and be thrown from its top and fall into the interior of the mixing barrel 4, so that the electric stirrer 5 fully stirs the permeable concrete mixture in the mixing barrel 4. When the planetary gear 602 rotates, the other side will mesh with the internal gear ring 8 for transmission, prompting the internal gear ring 8 to rotate horizontally, and then changing the moving position of the scraping rod 801 to scrape off the permeable concrete mixture on the inner wall of the mixing barrel 4. Finally, the worker opens the valve 402 at the bottom of the mixing barrel 4, so that the permeable concrete mixture flows out through the flow meter 401, and the timer 2012 automatically records the outflow time. When the permeable concrete mixture has flowed out, close the valve 402, calculate the outflow rate through the control component 2011, and display the test result.

[0041] The above describes the embodiments of the specific implementation manner, but this embodiment is not limited to the above specific implementation manner. The above specific implementation manner is only illustrative and not restrictive. Under the inspiration of this embodiment, those of ordinary skill in the art can also make many forms, all of which fall within the protection scope of this embodiment.

Claims

1. A method for testing the workability of permeable concrete; the method is completed by the following steps, characterized in that: S1, pouring the permeable concrete mixture into the mixing bucket (4), ensuring that the height of the permeable concrete mixture does not exceed two-thirds of the mixing bucket (4); S2, starting the electric stirrer (5) and setting the stirring time to 3 minutes, so that the electric stirrer (5) can fully and evenly stir the permeable concrete mixture in the mixing barrel (4); S3, the electric stirrer (5) stops stirring, and the valve (402) at the bottom of the mixing barrel (4) is opened to allow the permeable concrete mixture to flow out through the flow meter (401); S4, a timer (2012) automatically records the outflow time, and when the permeable concrete mixture has finished flowing, the valve (402) is closed; S5. Calculate the outflow rate through the control component (2011) and display the test results.

2. A permeable concrete workability testing device, suitable for a permeable concrete workability testing method as claimed in claim 1, comprising a base (1) and a mixing barrel (4); characterized in that: A stirring barrel (4) is mounted on the top of the base (1), a valve (402) is fixedly mounted on the bottom of the stirring barrel (4), a flow meter (401) is mounted on the bottom of the stirring barrel (4) near the valve (402), a bracket (2) is fixedly mounted on one side of the top of the base (1), a measuring mechanism (201) is mounted on the side of the bracket (2), a cover plate (7) is mounted on the top of the stirring barrel (4), an electric stirrer (5) is mounted inside the cover plate (7), and a high-efficiency mechanism (6) is mounted on the outside of the transmission shaft of the electric stirrer (5); The high-efficiency mechanism (6) comprises a sun gear (601), a planetary gear (602), a feeding rod (603) and a feeding barrel (604); the sun gear (601) is mounted on the outer side of the transmission shaft of the electric stirrer (5); planetary gears (602) are mounted on both sides of the top of the cover plate (7) close to the sun gear (601); the sun gear (601) and the planetary gears (602) are meshed for transmission; the feeding rod (603) is mounted on the bottom end of the planetary gear (602); and the feeding barrel (604) is mounted on the outer side of the feeding rod (603).

3. A permeable concrete workability testing device according to claim 2, characterized in that: Adjustment feet (101) are installed at the four corners of the bottom of the base (1).

4. A permeable concrete workability testing device according to claim 2, characterized in that: A fixing fixture (3) is installed on the top of the base (1), and a mixing barrel (4) is clamped inside the fixing fixture (3).

5. A permeable concrete workability testing device according to claim 2, characterized in that: The measuring mechanism (201) comprises a control component (2011) and a timer (2012); the control component (2011) is fixedly mounted on the side of the bracket (2), and the timer (2012) is fixedly mounted on the top of the control component (2011).

6. A permeable concrete workability testing device according to claim 2, characterized in that: A transmission assembly (202) is installed inside the bracket (2), and a cover plate (7) is transmission-connected to the outside of the transmission assembly (202).

7. A permeable concrete workability testing device according to claim 2, characterized in that: The electric stirrer (5) comprises a motor (501), a stirring rod (502) and stirring blades (503); the motor (501) is fixedly mounted on the top of the cover plate (7); the stirring rod (502) is mounted on the output end of the motor (501) through the inside of the cover plate (7); three groups of stirring blades (503) are mounted at equal angles on the bottom of the stirring rod (502); and a sun gear (601) is fixedly connected to the outside of the stirring rod (502).

8. A permeable concrete workability testing device according to claim 2, characterized in that: An inner gear ring (8) is rotatably mounted on the top of the cover plate (7) near the outer side of the planetary gear (602), a scraper rod (801) is fixedly mounted on the bottom of the inner gear ring (8), and the inner gear ring (8) is meshed with the planetary gear (602) for transmission.

9. A permeable concrete workability testing device according to claim 2, characterized in that: An annular tube (701) is fixedly installed on the outer side of the inner top of the cover plate (7) close to the inner gear ring (8), and a connecting tube (702) is installed on the top of the annular tube (701) passing through the inside of the cover plate (7).

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