A concrete test block pressure bleeding testing device

Abstract

The application provides a concrete test block pressure bleeding test device and relates to the field of concrete test equipment. The device comprises a base, a rack fixedly connected to the base, a test material cylinder arranged on the base, a tamping mechanism arranged above the test material cylinder, a top cover, a tamping rod and a hydraulic cylinder. The hydraulic cylinder is fixedly connected to the rack, the output end of the hydraulic cylinder is fixedly connected with the top cover, and the bottom of the top cover is fixedly connected with the tamping rod. The concrete test block pressure bleeding test device is provided with the tamping mechanism. The tamping rod can be driven by the hydraulic cylinder to move up and down to tamp the concrete in the test material cylinder, manual tamping is not needed, the manpower is effectively saved, the tamping effect and tamping efficiency are improved, the uniformity of tamping is ensured, and the accuracy of detection data is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of concrete test equipment, in particular to a concrete test block pressure bleeding test device. BACKGROUND

[0002] Concrete bleeding is a phenomenon that water appears on the surface from the outside after the concrete is poured and tamped but before it sets. With the development of concrete technology, concrete is developing towards high strength and high performance. The water-cement ratio of high-strength and high-performance concrete is low, and the compactness is large. Bleeding rate is an important indicator for detecting concrete strength, and bleeding test plays an irreplaceable important role in the concrete detection process on the construction site.

[0003] When detecting concrete, the mixture is placed in the test cylinder, the tamping rod is tamped from the outside to the inside for 25 times, the piston is installed, the air outlet screw is removed, the piston is pressed to contact the concrete surface, the screw is tightened, the upper cover is tightly covered and the nut is tightened, the manual pump is connected with the piston cylinder joint; the manual oil return valve is tightened clockwise, the handle of the manual pump is operated, the pressure is increased to 30mpa, the reading of the pressure gauge at this time is 3.0mpa; when the pressure reaches 30Mpa, open the water separation valve immediately, separate the water into a 1000ml measuring cylinder, start timing, and record the water separation amount V1, V140 at 10 seconds and 140 seconds as the basic data for calculating the bleeding rate; after obtaining the data, loosen the oil return valve counterclockwise to release the pressure, remove the upper cover and the test cylinder, place them on the demolding frame, cover the upper cover and tighten the nut. Tighten the oil return valve clockwise, pressurize to make the concrete and the piston automatically fall off, remove the upper cover and the test cylinder, loosen the oil return valve, manually press the piston back, and the test is completed.

[0004] However, in the existing technology, in order to make the concrete in the test cylinder uniform, artificial operation is often relied on, which is time-consuming and laborious and the effect is difficult to ensure uniformity, affecting the accuracy of the detection data. SUMMARY

[0005] (I) Technical problems solved

[0006] In view of the deficiencies of the prior art, the present application provides a concrete test block pressure bleeding test device, which solves the problems raised in the above background art.

[0007] (II) Technical scheme

[0008] In order to achieve the above purpose, the present application is realized by the following technical scheme: a concrete test block pressure bleeding test device, comprising a base, a rack is fixedly connected to the base, a test cylinder is arranged on the base, a tamping mechanism is arranged above the test cylinder, the tamping mechanism comprises a top cover, a tamping rod and a hydraulic cylinder, the hydraulic cylinder is fixedly connected to the rack, the output end of the hydraulic cylinder is fixedly connected with the top cover, and the bottom of the top cover is fixedly connected with the tamping rod.

[0009] Preferably, the tamping rods are provided in plurality and uniformly distributed on the top cover.

[0010] Preferably, the length of the tamping rod is not greater than the depth of the sample cylinder.

[0011] Preferably, the base is provided with a uniform rotation mechanism for automatically rotating the concrete in the sample cylinder after each tamping, the uniform rotation mechanism comprising an outer rotating cylinder, a driving assembly, a lifting seat, a bearing seat, an outer sleeve, an inner sleeve, a fixed seat, a spring, a first guide piece and a second guide piece, the fixed seat being fixedly connected with the base, the top of the fixed seat being fixedly connected with the inner sleeve, the outer sleeve being sleeved on the outer portion of the inner sleeve, the top end of the spring being fixedly connected with the inner top end of the outer sleeve, the bottom end of the spring being fixedly connected with the inner bottom end of the inner sleeve, the top of the outer sleeve being rotatably connected with the bearing seat, the top of the bearing seat being fixedly connected with the lifting seat, the top of the lifting seat being provided with the sample cylinder, the outer portion of the lifting seat being sleeved with the outer rotating cylinder, the outer rotating cylinder being provided with the driving assembly for driving the rotation of the outer rotating cylinder, the outer rotating cylinder being rotatably connected with the base, the lifting seat being provided in a cylindrical shape, the first guide piece and the second guide piece being provided between the outer rotating cylinder and the lifting seat, the number of the first guide piece and the second guide piece being the same, the first guide piece and the second guide piece being spaced apart from each other and being circumferentially distributed around the axis of the lifting seat, the top surface of the first guide piece being provided with a first inclined surface, the bottom surface of the second guide piece being provided with a second inclined surface matched with the first inclined surface, the first guide piece being fixedly connected with the lifting seat, the second guide piece being fixedly connected with the outer rotating cylinder, when tamping, the hydraulic cylinder drives the top cover to descend so that the tamping rod is inserted into the concrete in the sample cylinder for tamping, at the same time, the hydraulic cylinder drives the lifting seat to descend through the sample cylinder until the highest position of the lifting seat is lower than the lowest position of the outer rotating cylinder, at this time, the driving assembly controls the rotation of the outer rotating cylinder so that the second guide piece on the inner wall of the outer rotating cylinder moves to the right above the first guide piece on the outer wall of the lifting seat, at this time, the hydraulic cylinder is retracted, the lifting seat moves upward under the action of the spring, at this time, under the action of the first inclined surface on the first guide piece and the second inclined surface on the second guide piece, the lifting seat will rotate rapidly once when rising, so that the first guide piece moves between the two second guide pieces, the lifting seat drives the synchronous rotation of the sample cylinder, so that the concrete in the sample cylinder is more uniform when the lifting seat is reset, and the tamping effect of the tamping rod can be better next time.

[0012] Preferably, the first guide piece and the second guide piece are the same in size and shape, which can save the cost of mold opening.

[0013] Preferably, the driving assembly comprises a gear ring, a gear and a servo motor, the gear ring being fixedly connected with the outer portion of the outer rotating cylinder, the gear being fixedly connected with the output end of the servo motor, the gear being engaged with the gear ring, the servo motor being fixedly connected with the base.

[0014] Preferably, it further comprises a trigger assembly for automatically controlling the driving assembly to work, the trigger assembly comprising a central rod, a trigger block, a button switch, a single-chip microcomputer, the central rod being arranged in the outer sleeve, and the top end of the central rod being fixedly connected with the outer sleeve, the bottom end of the central rod being fixedly connected with the trigger block, the bottom center of the inner sleeve being fixedly connected with the button switch, and the button switch corresponding to the trigger block, the single-chip microcomputer being fixedly connected in the fixed seat, and the button switch and the servo motor being electrically connected with the single-chip microcomputer, when the lifting seat moves to the lower side of the outer rotating cylinder, the trigger block at the bottom end of the central rod presses the button switch, the button switch sends a signal to the single-chip microcomputer, and the single-chip microcomputer controls the servo motor to rotate the outer rotating cylinder.

[0015] Preferably, the top of the lifting seat is fixedly connected with a first permanent magnet, the bottom of the sample cylinder is provided with a plug hole corresponding to the first permanent magnet, and the plug hole is fixedly connected with a second permanent magnet, the first permanent magnet and the second permanent magnet are mutually attracted magnets, and the sample cylinder can be detachably connected to the top of the lifting seat.

[0016] (Three) beneficial effects

[0017] The application provides a concrete test block pressure bleeding test device.

[0018] 1. The concrete test block pressure bleeding test device, through the setting of the tamping mechanism, the concrete in the sample cylinder can be tamped by the up-down movement of the tamping rod driven by the hydraulic cylinder, manual tamping is not needed, manpower is effectively saved, tamping effect and tamping efficiency are improved, uniformity of tamping is guaranteed, and accuracy of detection data is ensured.

[0019] 2. The concrete test block pressure bleeding test device, through the setting of the uniform rotating mechanism, when tamping, the tamping rod is inserted into the concrete in the sample cylinder to tamping under the action of the top cover descending driven by the hydraulic cylinder, meanwhile, the lifting seat is lowered by the hydraulic cylinder through the sample cylinder, until the highest position of the lifting seat is lower than the lowest position of the outer rotating cylinder, at this time, the driving assembly controls the outer rotating cylinder to rotate, the second guide piece on the inner wall of the outer rotating cylinder moves to the top of the first guide piece on the outer wall of the lifting seat, at this time, the hydraulic cylinder is retracted, the lifting seat moves upward under the action of the spring, under the action of the first inclined surface on the first guide piece and the second inclined surface on the second guide piece, the lifting seat rotates rapidly once when rising and resetting, the first guide piece moves between the two second guide pieces, the sample cylinder is synchronously rotated by the lifting seat, the concrete in the sample cylinder is more uniform when the lifting seat resets, the tamping effect of the tamping rod next time is better, and therefore, the tamping effect is guaranteed when the concrete in the sample cylinder is in a relatively uniform state when the tamping rod descends each time.

[0020] 3. This concrete test block pressure bleeding test device, through the setting of the trigger component, when the lifting seat moves to the bottom of the outer rotating cylinder, the trigger block at the bottom of the center rod presses the button switch, the button switch sends a signal to the microcontroller, the microcontroller controls the servo motor to rotate the outer rotating cylinder, thus it can automatically control the operation of the outer rotating cylinder according to the state of the lifting seat, making the operation more convenient and easy. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the material tamping mechanism of the present invention;

[0023] Figure 3 This is a schematic diagram of the uniform rotation mechanism of the present invention. Figure 1 ;

[0024] Figure 4 This is a schematic diagram of the uniform rotation mechanism of the present invention. Figure 2 ;

[0025] Figure 5 This is a cross-sectional view of the rotating mechanism of the present invention;

[0026] Figure 6 For the present invention Figure 5 Enlarged view of the structure at point A in the middle;

[0027] Figure 7 For the present invention Figure 5 Enlarged view of the structure at point B in the middle.

[0028] In the diagram: 1. Base, 2. Frame, 3. Hydraulic cylinder, 4. Top cover, 5. Sample cylinder, 6. Tamping rod, 7. Lifting seat, 8. First permanent magnet, 9. Second permanent magnet, 10. Outer rotating cylinder, 11. Gear ring, 12. Gear, 13. Servo motor, 14. Outer sleeve, 15. Inner sleeve, 16. Fixed seat, 17. First guide plate, 18. Second guide plate, 19. Bearing seat, 20. Spring, 21. Push button switch, 22. Microcontroller, 23. Center rod, 24. Trigger block. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0030] This invention provides a device for testing the pressure bleeding of concrete test blocks, such as... Figures 1-7 As shown, the device includes a base 1, a frame 2 fixedly connected to the base 1, a sample cylinder 5 on the base 1, and a tamping mechanism above the sample cylinder 5. The tamping mechanism includes a top cover 4, a tamping rod 6, and a hydraulic cylinder 3. The hydraulic cylinder 3 is fixedly connected to the frame 2, and the top cover 4 is fixedly connected to the output end of the hydraulic cylinder 3. The tamping rod 6 is fixedly connected to the bottom of the top cover 4.

[0031] Through the setting of the tamping mechanism, the concrete in the test sample cylinder 5 can be inserted and tamped by driving the tamping rod 6 to move up and down by the hydraulic cylinder 3, without manual insertion and tamping, effectively saving manpower, improving the insertion and tamping effect and efficiency, ensuring the uniformity of insertion and tamping, and ensuring the accuracy of detection data.

[0032] The tamping rod 6 is provided in a plurality, and the plurality of tamping rods 6 are uniformly distributed on the top cover 4.

[0033] The length of the tamping rod 6 is not greater than the depth of the test sample cylinder 5.

[0034] In some embodiments, as Figures 3-5As shown, the base 1 is provided with a uniform rotation mechanism for automatically rotating the concrete in the sample cylinder 5 after each insertion. The uniform rotation mechanism includes an outer rotating cylinder 10, a drive assembly, a lifting seat 7, a bearing seat 19, an outer sleeve 14, an inner sleeve 15, a fixed seat 16, a spring 20, a first guide piece 17, and a second guide piece 18. The fixed seat 16 is fixedly connected to the base 1. The top of the fixed seat 16 is fixedly connected to the inner sleeve 15. The outer sleeve 14 is sleeved on the outer part of the inner sleeve 15. The top end of the spring 20 is fixedly connected to the inner top end of the outer sleeve 14. The bottom end of the spring 20 is fixedly connected to the inner bottom end of the inner sleeve 15. The top of the outer sleeve 14 is rotatably connected to the bearing seat 19. The top of the bearing seat 19 is fixedly connected to the lifting seat 7. The top of the lifting seat 7 is provided with the sample cylinder 5. The lifting seat 7 is sleeved with the outer rotating cylinder 10. The outer rotating cylinder 10 is provided with a drive assembly for driving the outer rotating cylinder 10 to rotate. The outer rotating cylinder 10 is rotatably connected to the base 1. The lifting seat 7 is a cylinder. The first guide piece 17 and the second guide piece 18 are arranged between the outer rotating cylinder 10 and the lifting seat 7. The first guide piece 17 and the second guide piece 18 are arranged at equal intervals and are distributed in a circle with the axis of the lifting seat 7 as the center. The top surface of the first guide piece 17 is provided with a first inclined surface. The bottom surface of the second guide piece 18 is provided with a second inclined surface matching the first inclined surface. The first guide piece 17 is fixedly connected to the lifting seat 7. The second guide piece 18 is fixedly connected to the outer rotating cylinder 10. When the material is tamped, the hydraulic cylinder 3 drives the top cover 4 to descend so that the tamper bar 6 is inserted into the concrete in the sample cylinder 5 to tamp the material. At the same time, the hydraulic cylinder 3 drives the lifting seat 7 to descend through the sample cylinder 5 until the highest part of the lifting seat 7 is lower than the lowest part of the outer rotating cylinder 10. At this time, the drive assembly controls the outer rotating cylinder 10 to rotate so that the second guide piece 18 on the inner wall of the outer rotating cylinder 10 moves to the top of the first guide piece 17 on the outer wall of the lifting seat 7. At this time, the hydraulic cylinder 3 is retracted. The lifting seat 7 moves upward under the action of the spring 20. At this time, under the action of the first inclined surface on the first guide piece 17 and the second inclined surface on the second guide piece 18, the lifting seat 7 rotates rapidly when it is lifted and reset, so that the first guide piece 17 moves between the two second guide pieces 18. The lifting seat 7 drives the sample cylinder 5 to rotate synchronously, so that the concrete in the sample cylinder 5 is more uniform when the lifting seat 7 is reset, which can make the tamping effect of the next tamper bar 6 better.

[0035] When the material is tamped, the hydraulic cylinder 3 drives the top cover 4 to descend, so that the tamping rod 6 is inserted into the concrete in the sample cylinder 5 to tamp the material, and at the same time, the hydraulic cylinder 3 drives the lifting seat 7 to descend through the sample cylinder 5 until the highest position of the lifting seat 7 is lower than the lowest position of the outer rotating cylinder 10. At this time, the driving assembly controls the outer rotating cylinder 10 to rotate, so that the second guide piece 18 on the inner wall of the outer rotating cylinder 10 moves to the top of the first guide piece 17 on the outer wall of the lifting seat 7. At this time, the hydraulic cylinder 3 is retracted, and the lifting seat 7 moves upward under the action of the spring 20. At this time, under the action of the first inclined surface on the first guide piece 17 and the second inclined surface on the second guide piece 18, the lifting seat 7 will rotate rapidly once when it is lifted and reset, so that the first guide piece 17 moves between the two second guide pieces 18. The lifting seat 7 drives the sample cylinder 5 to rotate synchronously, so that the concrete in the sample cylinder 5 is more uniform when the lifting seat 7 is reset, and the tamping effect of the tamping rod 6 is better next time, so as to ensure that the concrete in the sample cylinder 5 is in a relatively uniform state when the tamping rod 6 descends each time, and the tamping effect is ensured.

[0036] The first guide piece 17 and the second guide piece 18 are the same in size and shape, which can save mold opening cost.

[0037] The driving assembly comprises a gear ring 11, a gear 12 and a servo motor 13. The gear ring 11 is fixedly connected to the outside of the outer rotating cylinder 10, the gear 12 is fixedly connected to the output end of the servo motor 13, the gear 12 and the gear ring 11 are in meshing relationship, and the servo motor 13 is fixedly connected to the base 1.

[0038] In some embodiments, as shown in Figures 5-7 The trigger assembly is further arranged for automatically controlling the working of the driving assembly. The trigger assembly comprises a central rod 23, a trigger block 24, a button switch 21 and a single-chip microcomputer 22. The central rod 23 is arranged in the outer sleeve 14, and the top end of the central rod 23 is fixedly connected to the outer sleeve 14. The bottom end of the central rod 23 is fixedly connected with the trigger block 24. The bottom center of the inner sleeve 15 is fixedly connected with the button switch 21, and the button switch 21 corresponds to the trigger block 24. The single-chip microcomputer 22 is fixedly connected in the fixed seat 16, and the button switch 21 and the servo motor 13 are electrically connected with the single-chip microcomputer 22. When the lifting seat 7 moves to the lower side of the outer rotating cylinder 10, the trigger block 24 at the bottom end of the central rod 23 presses the button switch 21, the button switch 21 sends a signal to the single-chip microcomputer 22, and the single-chip microcomputer 22 controls the servo motor 13 to rotate the outer rotating cylinder 10.

[0039] Through the arrangement of the trigger assembly, when the lifting seat 7 moves to the lower side of the outer rotating cylinder 10, the trigger block 24 at the bottom end of the central rod 23 presses the button switch 21, the button switch 21 sends a signal to the single-chip microcomputer 22, and the single-chip microcomputer 22 controls the servo motor 13 to rotate the outer rotating cylinder 10, so that the operation of the outer rotating cylinder 10 can be automatically controlled according to the state of the lifting seat 7, and the operation is more convenient.

[0040] The top of the lifting seat 7 is fixedly connected with a first permanent magnet 8, the bottom of the sample cylinder 5 is provided with a corresponding insertion hole of the first permanent magnet 8, and the insertion hole is fixedly connected with a second permanent magnet 9, the first permanent magnet 8 and the second permanent magnet 9 are mutually attracted magnets, so that the sample cylinder 5 can be detachably connected to the top of the lifting seat 7.

[0041] Working principle: through the setting of the tamping mechanism, the concrete in the sample cylinder 5 can be inserted and tamped by the up and down movement of the tamping rod 6 driven by the hydraulic cylinder 3, without manual insertion and tamping, effectively saving manpower, improving the insertion and tamping effect and efficiency, ensuring the uniformity of insertion and tamping, and ensuring the accuracy of detection data.

[0042] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A device for testing the pressure drainage of a concrete test block, comprising a base (1), characterised in that: The base (1) is fixedly connected with a rack (2), the base (1) is provided with a sample cylinder (5), the upper portion of the sample cylinder (5) is provided with a sample tamping mechanism, the sample tamping mechanism comprises a top cover (4), a tamping rod (6) and a hydraulic cylinder (3), the hydraulic cylinder (3) is fixedly connected to the rack (2), the output end of the hydraulic cylinder (3) is fixedly connected with the top cover (4), the bottom of the top cover (4) is fixedly connected with the tamping rod (6), the hydraulic cylinder (3) drives the tamping rod (6) to move up and down to insert and tamp the concrete in the sample cylinder (5); the length of the tamping rod (6) is not greater than the depth of the sample cylinder (5); the base (1) is provided with a uniform rotation mechanism for automatically rotating the concrete in the sample cylinder (5) after each time of insertion and tamping, the uniform rotation mechanism comprises an outer rotating cylinder (10), a driving assembly, a lifting seat (7), a bearing seat (19), an outer sleeve (14), an inner sleeve (15), a fixed seat (16), a spring (20), a first guide piece (17) and a second guide piece (18), the fixed seat (16) is fixedly connected with the base (1), the top of the fixed seat (16) is fixedly connected with the inner sleeve (15), the outer portion of the inner sleeve (15) is sleeved with the outer sleeve (14), the top end of the spring (20) is fixedly connected with the inner top end of the outer sleeve (14), the bottom end of the spring (20) is fixedly connected with the inner bottom end of the inner sleeve (15), the top of the outer sleeve (14) is rotatably connected with the bearing seat (19), the top of the bearing seat (19) is fixedly connected with the lifting seat (7), the top of the lifting seat (7) is provided with the sample cylinder (5), the outer portion of the lifting seat (7) is sleeved with the outer rotating cylinder (10), the outer rotating cylinder (10) is provided with the driving assembly for driving the outer rotating cylinder (10) to rotate, the outer rotating cylinder (10) is rotatably connected with the base (1), the lifting seat (7) is in the shape of a cylinder, and the first guide piece (17) and the second guide piece (18) are arranged between the outer rotating cylinder (10) and the lifting seat (7), the number of the first guide piece (17) and the second guide piece (18) is the same, the first guide piece (17) and the second guide piece (18) are arranged at intervals and are distributed in a circular manner with the axis of the lifting seat (7) as the center, the top surface of the first guide piece (17) is provided with a first inclined surface, the bottom surface of the second guide piece (18) is provided with a second inclined surface matched with the first inclined surface, the first guide piece (17) is fixedly connected with the lifting seat (7), and the second guide piece (18) is fixedly connected with the outer rotating cylinder (10).

2. The apparatus of claim 1, wherein: The tamping rod (6) is provided in a plurality of pieces, and the plurality of tamping rods (6) are uniformly distributed on the top cover (4).

3. A device for testing the pressure drainage of a concrete test block according to claim 2, characterized in that: When the material is rammed, the hydraulic cylinder (3) drives the top cover (4) to descend, so that the rammer (6) is inserted into the concrete in the sample cylinder (5) to ram the material, at the same time, the hydraulic cylinder (3) drives the lifting seat (7) to descend through the sample cylinder (5), until the highest part of the lifting seat (7) is lower than the lowest part of the outer rotating cylinder (10), at this time, the driving assembly controls the outer rotating cylinder (10) to rotate, so that the second guide piece (18) on the inner wall of the outer rotating cylinder (10) moves to the top of the first guide piece (17) on the outer wall of the lifting seat (7), at this time, the hydraulic cylinder (3) is retracted, the lifting seat (7) moves upward under the action of the spring (20), at this time, under the action of the first inclined surface on the first guide piece (17) and the second inclined surface on the second guide piece (18), the lifting seat (7) will rotate rapidly once when it is lifted and reset, so that the first guide piece (17) moves between the two second guide pieces (18), the lifting seat (7) drives the sample cylinder (5) to rotate synchronously, so that the concrete in the sample cylinder (5) is more uniform when the lifting seat (7) is reset, and the ramming effect of the next rammer (6) is better.

4. A device for testing the pressure drainage of a concrete test block according to claim 3, characterized in that: The first guide piece (17) and the second guide piece (18) are the same in size and shape, which can save mold opening cost.

5. A device for testing the pressure drainage of a concrete test block according to claim 4, characterized in that: The driving assembly comprises a gear ring (11), a gear (12) and a servo motor (13), the gear ring (11) is fixedly connected to the outside of the outer rotating cylinder (10), the gear (12) is fixedly connected to the output end of the servo motor (13), the gear (12) and the gear ring (11) are in meshing engagement, and the servo motor (13) is fixedly connected to the base (1).

6. A device for testing the pressure drainage of a concrete test block according to claim 5, characterized in that: The trigger assembly for automatically controlling the work of the driving assembly comprises a center rod (23), a trigger block (24), a button switch (21) and a single-chip microcomputer (22), the center rod (23) is arranged in the outer sleeve (14), the top end of the center rod (23) is fixedly connected to the outer sleeve (14), the bottom end of the center rod (23) is fixedly connected with the trigger block (24), the bottom center of the inner sleeve (15) is fixedly connected with the button switch (21), the button switch (21) corresponds to the trigger block (24), the single-chip microcomputer (22) is fixedly connected in the fixed seat (16), and the button switch (21) and the servo motor (13) are electrically connected with the single-chip microcomputer (22), when the lifting seat (7) moves to below the outer rotating cylinder (10), the trigger block (24) at the bottom end of the center rod (23) presses the button switch (21), the button switch (21) sends a signal to the single-chip microcomputer (22), and the single-chip microcomputer (22) controls the servo motor (13) to rotate the outer rotating cylinder (10).

7. A device for testing the pressure drainage of a concrete test block according to claim 6, characterized in that: The top of the lifting seat (7) is fixedly connected with a first permanent magnet (8), the bottom of the sample cylinder (5) is provided with a plug hole corresponding to the first permanent magnet (8), and a second permanent magnet (9) is fixedly connected in the plug hole, the first permanent magnet (8) and the second permanent magnet (9) are mutually attracted magnets, so that the sample cylinder (5) can be detachably connected to the top of the lifting seat (7).

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