A device for detecting concrete working performance and a method of using the same

Abstract

The present invention relates to the technical field of concrete testing, and specifically discloses a device for testing the working performance of concrete and a method for using the same, wherein the device comprises a testing box; an installation unit arranged in the testing box, comprising a top plate, a bottom plate and a lifting plate; a specimen placing unit, which is arranged on the upper end surface of the bottom plate, comprising a placing tube and a lower sealing ring, wherein a paraffin filling cavity is formed between the placing tube and the concrete specimen, and a paraffin storage area connected to the paraffin filling cavity is also arranged in the placing tube; and a capping detection unit, which is arranged on the lower end surface of the lifting plate, comprising an upper cap and an upper sealing ring. The upper and lower end surfaces of the concrete specimen are first sealed with an upper sealing ring and a lower sealing ring, and then the paraffin filling cavity on the periphery of the concrete specimen is filled, wrapped and sealed with molten paraffin, thereby effectively improving the overall sealing effect, avoiding water leakage from the outer peripheral surface of the concrete specimen during the anti-seepage test, and ensuring the accuracy and stability of the test effect.

Description

Technical Field

[0001] The present invention relates to the technical field of concrete detection, and more particularly to a device for detecting the working performance of concrete and a method for using the device. Background Art

[0002] In order to ensure that concrete meets specific engineering requirements, it is necessary to conduct targeted tests on parameters such as concrete's anti-permeability, compressive strength and slump. Among them, concrete's anti-permeability refers to the ability of concrete to resist the penetration of pressurized water. Usually, an anti-permeability test device is used to conduct an anti-permeability test on concrete specimens.

[0003] At present, before conducting water-resistance test on concrete specimens, in order to ensure the test effect, it is necessary to first roll the outer circumference of the concrete specimen in molten paraffin for several weeks so that the outer circumference of the specimen is completely covered by the paraffin, and then press the specimen into the sleeve for water pressure water-resistance test; due to the irregularity of the outer circumference of the concrete specimen, the thickness consistency of the paraffin rolled on the outer circumference of the specimen cannot be guaranteed, and in the process of pressing the specimen into the sleeve, the wrapped paraffin is easily compressed, deformed and ruptured, thereby making the seal of the outer circumference of the specimen fail; in addition, in the process of rolling the paraffin, local areas of the upper and lower end faces of the specimen are easily covered by the paraffin, which causes the upper and lower end faces of the specimen to be unable to be completely exposed in the water pressure water-resistance test area, affecting the accuracy of the water-resistance test. Summary of the invention

[0004] In order to overcome the above technical problems, the present invention proposes a device for detecting the working performance of concrete and a method for using the same.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A device for detecting the working performance of concrete, comprising a detection box; and further comprising:

[0007] The mounting unit is arranged in the detection box, and comprises a top plate and a bottom plate, wherein the top plate and the bottom plate are fixedly connected by a plurality of guide columns, a lifting plate is slidingly sleeved on the guide columns, and a lifting cylinder for driving the lifting plate is installed on the top plate;

[0008] The specimen placement unit is arranged on the upper surface of the bottom plate, and comprises a placement cylinder for filling the concrete specimen and a lower sealing ring coaxially distributed in the placement cylinder, a paraffin filling cavity is formed between the placement cylinder and the concrete specimen, and a paraffin storage area connected to the paraffin filling cavity is also arranged in the placement cylinder;

[0009] The capping detection unit is arranged on the lower end surface of the lifting plate, and includes an upper cap adapted to the upper end slot of the placing cylinder and an upper sealing ring coaxially distributed in the upper cap. The upper cap is circumferentially provided with a plurality of through holes, and an annular sealing ring is arranged at the lower end of the upper sealing ring.

[0010] As a further solution of the present invention: the paraffin storage area includes an annular warehouse body arranged in the placement cylinder, the annular warehouse body is connected to the bottom of the paraffin filling cavity by a paraffin flow channel, a piston ring is slidably installed in the annular warehouse body, a first air pump is installed on the bottom plate, and the first air pump is connected to the top of the annular warehouse body by an air pipe.

[0011] As a further solution of the present invention: a first annular heating plate is arranged at the bottom of the annular warehouse body; and a second annular heating plate is arranged in the paraffin filling cavity.

[0012] As a further solution of the present invention: the lower sealing ring includes an annular block fixed on the bottom plate, an annular air cavity is opened in the annular block, an annular air bag is connected to the upper opening of the annular air cavity, and a vent hole connected to the inner side of the annular block is opened on the bottom plate.

[0013] As a further solution of the present invention: a circumferential positioning member is also provided in the placing tube, and the circumferential positioning member includes an annular chamber opened in the placing tube, a first air channel is connected between the annular chamber and the annular air cavity, and a plurality of rows of telescopic slide grooves are circumferentially opened on the inner wall of the annular chamber on the side facing the paraffin filling cavity, a slide plate is slidably installed in the telescopic slide groove, and a telescopic top rod extending into the paraffin filling cavity is fixed on the slide plate.

[0014] As a further solution of the present invention: a water storage tank is installed on the lifting plate, and a water injection channel is connected between the water storage tank and the interior of the upper sealing ring; a pressurizing chamber is opened in the lifting plate, and the pressurizing chamber is connected to the interior of the upper sealing ring; a second air pump is installed on the lifting plate, and a second air channel is connected between the second air pump and the pressurizing chamber.

[0015] As a further solution of the present invention: a one-way valve is installed at the connection between the water injection channel and the interior of the upper sealing ring, and the one-way valve only allows the water injection channel to be connected to one side of the upper sealing ring; an elastic diaphragm is provided at the connection between the pressurizing chamber and the interior of the upper sealing ring.

[0016] As a further solution of the present invention: a filter plate is detachably installed at the bottom of the detection box, a suction pump is installed on one side of the detection box, an input end of the suction pump is connected to the bottom of the detection box through a suction pipe, a filter is installed on the suction pipe, and an output end of the suction pump is connected to a flushing head through a corrugated hose.

[0017] As a further solution of the present invention: flip units are symmetrically arranged on both sides of the detection box, and the flip units include a mounting platform fixed on the detection box, a flip axis rotatably mounted on the mounting platform, and a flip cylinder vertically mounted on the mounting platform, one end of the flip axis is fixedly connected to the top plate, a gear is installed at the end of the flip axis away from the top plate, and a rack meshing with the gear is installed at the output end of the flip cylinder.

[0018] The present invention also discloses a method for using a device for detecting the working performance of concrete, comprising the following steps:

[0019] S1. Place the concrete specimen in the placement tube;

[0020] S2, the capping detection unit moves downward, and the upper and lower end surfaces of the concrete specimen are sealed with an upper sealing ring and a lower sealing ring respectively;

[0021] S3, squeezing the molten paraffin in the paraffin storage area into the paraffin filling cavity, and performing paraffin sealing on the outer peripheral surface of the concrete specimen after the paraffin is cooled and solidified;

[0022] S4. Conduct water pressure and water seepage test on the upper end surface of the concrete specimen.

[0023] Beneficial effects of the present invention:

[0024] The present invention first uses an upper sealing ring and a lower sealing ring to seal the outer circles of the upper and lower end surfaces of the concrete specimen, and then uses molten paraffin to fill the paraffin filling cavity outside the concrete specimen. After the paraffin is solidified, the outer peripheral surface of the concrete specimen is fully wrapped and sealed. The paraffin wrapping has good consistency in thickness, which can effectively improve the overall sealing effect and avoid moisture leakage from the outer peripheral surface of the concrete specimen during the anti-seepage test. At the same time, it can adapt to concrete specimens with different contours, and there is no need to press and assemble the specimen, which is convenient for disassembly and assembly of the specimen. In addition, the upper sealing ring and the lower sealing ring can effectively isolate the upper and lower end surfaces of the specimen from the outer peripheral surface, thereby avoiding the paraffin wrapped on the outer peripheral surface of the specimen from overflowing to the upper and lower end surfaces of the specimen, thereby ensuring the accuracy and stability of the anti-seepage test. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below in conjunction with the accompanying drawings.

[0026] Figure 1 It is a three-dimensional schematic diagram of a device for detecting the working performance of concrete according to the present invention;

[0027] Figure 2 It is a structural schematic diagram of an installation unit in a device for detecting concrete working performance of the present invention;

[0028] Figure 3It is a structural schematic diagram of a specimen placement unit and a cover detection unit in a device for detecting concrete working performance of the present invention;

[0029] Figure 4 It is a cross-sectional view of a specimen placement unit and a cover detection unit in a device for detecting concrete working performance of the present invention;

[0030] Figure 5 It is a cross-sectional view of a test piece placement unit in a device for detecting concrete working performance of the present invention;

[0031] Figure 6 for Figure 5 Enlarged view of point A in the middle;

[0032] Figure 7 for Figure 5 Enlarged view of point B in the middle;

[0033] Figure 8 It is a cross-sectional view of a cover detection unit in a device for detecting concrete working performance according to the present invention;

[0034] Fig. 9 for Figure 8 Enlarged view of point C in the middle;

[0035] Fig.10 The present invention is a schematic diagram of the structure of a turnover unit in a device for detecting the working performance of concrete.

[0036] In the figure:

[0037] 100, detection box; 110, filter plate; 120, suction pump; 130, suction pipe; 140, filter; 150, corrugated hose; 160, flushing head;

[0038] 200, mounting unit; 210, top plate; 220, bottom plate; 221, vent; 230, guide column; 240, lifting plate; 250, lifting cylinder;

[0039] 300, specimen placement unit; 310, placement cylinder; 311, card slot; 320, lower sealing ring; 321, annular block; 322, annular air cavity; 323, annular air bag; 330, paraffin storage area; 331, annular warehouse; 332, paraffin flow channel; 333, first air pump; 334, air pipe; 335, piston ring; 336, first annular heating plate; 340, paraffin filling cavity; 341, second annular heating plate; 350, circumferential positioning member; 351, annular chamber; 352, first air channel; 353, telescopic slide groove; 354, slide plate; 355, telescopic ejector rod; 360, ultrasonic transducer; 361, ultrasonic generator;

[0040] 400, capping detection unit; 410, upper capping; 411, through hole; 420, upper sealing ring; 421, annular sealing ring; 430, water storage tank; 431, water injection channel; 432, one-way valve; 440, second air pump; 441, pressurizing chamber; 442, elastic diaphragm; 443, second air channel;

[0041] 500, turning unit; 510, mounting platform; 520, turning axis; 530, gear; 540, turning cylinder; 550, rack;

[0042] 600. Concrete specimen. DETAILED DESCRIPTION

[0043] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Each example may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples.

[0044] See also Figure 1 , Figure 2 and Figure 3 , the present invention discloses a device for detecting the working performance of concrete, including a detection box 100, a mounting unit 200, a specimen placement unit 300 and a capping detection unit 400;

[0045] See also Figure 2 The installation unit 200 is arranged in the detection box 100, and includes a top plate 210 and a bottom plate 220. The top plate 210 and the bottom plate 220 are fixedly connected by a plurality of guide columns 230. A lifting plate 240 is slidably sleeved on the guide columns 230. A lifting cylinder 250 for driving the lifting plate 240 is installed on the top plate 210;

[0046] See also Figure 4 and Figure 5 The specimen placement unit 300 is arranged on the upper end surface of the bottom plate 220, and includes a placement cylinder 310 for filling the concrete specimen 600 and a lower sealing ring 320 coaxially distributed in the placement cylinder 310, a paraffin filling cavity 340 is formed between the placement cylinder 310 and the concrete specimen 600, and a paraffin storage area 330 connected to the paraffin filling cavity 340 is also arranged in the placement cylinder 310;

[0047] See also Figure 4 and Figure 8The capping detection unit 400 is arranged on the lower end surface of the lifting plate 240, including an upper cap 410 adapted to the upper end slot 311 of the placing cylinder 310 and an upper sealing ring 420 coaxially distributed in the upper cap 410, and a plurality of through holes 411 are opened circumferentially on the upper cap 410, and an annular sealing ring 421 is arranged at the lower end of the upper sealing ring 420.

[0048] Specifically, the cylindrical concrete specimen 600 is placed in the placement tube 310, so that the bottom surface of the concrete specimen 600 contacts the lower sealing ring 320, and then the lifting plate 240 is driven downward along the guide column 230 by the lifting cylinder 250, driving the upper cover 410 and the upper sealing ring 420 to descend synchronously, so that the upper cover 410 and the placement tube 310 are closed, and at the same time, the upper sealing ring 420 contacts the upper end surface of the concrete specimen 600, and the upper and lower end surfaces of the concrete specimen 600 are sealed by mutual axial extrusion of the upper sealing ring 420 and the lower sealing ring 320; the solid paraffin in the paraffin filling cavity 340 is heated to a molten state, and then the molten paraffin is squeezed into the paraffin filling cavity 340, so that the molten paraffin completely wraps the outer peripheral surface of the concrete specimen 600, and after the paraffin is completely solidified, water is injected into the upper sealing ring 420 on the upper end surface of the concrete specimen 600 and pressurized to perform an anti-seepage test on the concrete specimen 600.

[0049] It should be noted that in the present invention, the upper sealing ring 420 and the lower sealing ring 320 are used to seal the outer rings of the upper and lower end surfaces of the concrete specimen 600, and then the molten paraffin is used to fill the paraffin filling cavity 340 outside the concrete specimen 600. After the paraffin is solidified, the outer peripheral surface of the concrete specimen 600 is fully wrapped and sealed, which can effectively improve the overall sealing effect and can adapt to concrete specimens 600 with different contours. The specimens are easy to disassemble and assemble, and moisture can be effectively prevented from leaking from the outer peripheral surface of the concrete specimen 600 during the anti-seepage test, thereby ensuring the accuracy and stability of the test effect.

[0050] In one embodiment, see Figure 4 , Figure 5 and Figure 6 For the extrusion process of molten paraffin, the paraffin storage area 330 includes an annular warehouse body 331 arranged in the placement cylinder 310, the annular warehouse body 331 is connected to the bottom of the paraffin filling cavity 340 by a paraffin flow channel 332, a piston ring 335 is slidably installed in the annular warehouse body 331, a first air pump 333 is installed on the bottom plate 220, and the first air pump 333 is connected to the top of the annular warehouse body 331 by an air pipe 334;

[0051] Specifically, paraffin is filled in the space below the piston ring 335 in the annular warehouse body 331. After the paraffin in the annular warehouse body 331 becomes molten, the first air pump 333 is turned on to blow air into the space above the piston ring 335 in the annular warehouse body 331 through the air pipe 334, thereby pushing the piston ring 335 downward, so that the molten paraffin in the lower space of the annular warehouse body 331 can enter the paraffin filling cavity 340 through the paraffin flow channel 332. Driven by the air pressure of the first air pump 333, the liquid level of the molten paraffin in the paraffin filling cavity 340 gradually rises until the outer peripheral surface of the concrete specimen 600 is completely covered. Then, the molten paraffin is completely solidified to achieve the wrapping and sealing of the outer peripheral surface of the concrete specimen 600.

[0052] Similarly, when recovering paraffin, after the paraffin in the paraffin filling cavity 340, the paraffin flow channel 332 and the annular storage body 331 becomes molten again, the first air pump 333 is started to suck air into the space above the piston ring 335 in the annular storage body 331, thereby driving the piston ring 335 upward, and the molten paraffin in the paraffin filling cavity 340 can be sucked back into the annular storage body 331 to achieve the recovery of the paraffin.

[0053] Accordingly, see Figure 5 and Figure 6 In order to switch the paraffin between the solid state and the molten state, a first annular heating plate 336 is provided at the bottom of the annular warehouse body 331; a second annular heating plate 341 is provided in the paraffin filling cavity 340;

[0054] Specifically, when paraffin needs to be transferred between the annular bin body 331 and the paraffin filling chamber 340, the first annular heating plate 336 and the second annular heating plate 341 are first turned on to heat the paraffin to a molten state, thereby facilitating the smooth flow of the paraffin; after the paraffin wraps and seals the concrete specimen 600, or when the paraffin is recovered and left idle in the annular bin body 331, the first annular heating plate 336 and the second annular heating plate 341 are turned off to allow the paraffin to cool and solidify naturally.

[0055] It should be noted that, since paraffin itself has a certain thermal conductivity, when the first annular heating plate 336 and the second annular heating plate 341 are turned on for heating, the solidified paraffin in contact with the first annular heating plate 336 and the second annular heating plate 341 will melt first, and then under the heat conduction of the paraffin itself, the remaining paraffin and the paraffin in the paraffin flow channel 332 can also melt quickly; in addition, in actual application, the action range of the first annular heating plate 336 can also cover the paraffin flow channel 332, thereby ensuring that the solidified paraffin in the annular warehouse body 331, the paraffin flow channel 332 and the paraffin filling cavity 340 can quickly and completely become a molten state.

[0056] For further information, see Figure 5 and Figure 6 The lower sealing ring 320 includes an annular block 321 fixed on the bottom plate 220, an annular air cavity 322 is formed in the annular block 321, an annular air bag 323 is connected to the upper opening of the annular air cavity 322, and a vent hole 221 communicating with the inner side of the annular block 321 is formed on the bottom plate 220;

[0057] Specifically, when the concrete specimen 600 is squeezed downward by the upper sealing ring 420, the lower end surface of the concrete specimen 600 simultaneously squeezes the annular airbag 323, so that the annular airbag 323 is compressed and deformed and in close contact with the lower end surface of the concrete specimen 600. Even the flatness of the lower end surface of the concrete specimen 600 can be well compatible, thereby improving the sealing effect of the lower sealing ring 320 and the concrete specimen 600 as a whole, and effectively avoiding leakage of molten paraffin in the paraffin filling cavity 340.

[0058] Furthermore, considering that the outer peripheral surface profile of the concrete specimen 600 is an irregular shape with uneven surfaces, when placing the concrete specimen 600 in the placement tube 310, if the placement position of the concrete specimen 600 is not centered, it is easy to cause the concrete specimen 600 and the placement tube 310 to be radially offset, resulting in a large difference in the lateral width of each area in the paraffin filling cavity 340, resulting in inconsistent wrapping thickness of the solidified paraffin on each part of the concrete specimen 600, affecting the consistency of the sealing effect of the outer peripheral surface of the concrete specimen 600; for this reason, please refer to Figure 5 , Figure 6 and Figure 7 The placing tube 310 is also provided with a circumferential positioning member 350, and the circumferential positioning member 350 includes an annular chamber 351 opened in the placing tube 310, and a first air passage 352 is connected between the annular chamber 351 and the annular air cavity 322, and a plurality of rows of telescopic slide grooves 353 are opened circumferentially on the inner wall of the annular chamber 351 on one side facing the paraffin filling cavity 340, and a slide plate 354 is slidably installed in the telescopic slide groove 353, and a telescopic ejector rod 355 extending into the paraffin filling cavity 340 is fixed on the slide plate 354;

[0059] Specifically, after the concrete specimen 600 is placed in the placing cylinder 310, when the upper sealing ring 420 presses the concrete specimen 600 downward, the lower end surface of the concrete specimen 600 simultaneously presses the annular airbag 323, and the gas in the annular airbag 323 enters the annular air cavity 322, increasing the air pressure in the annular air cavity 322. Subsequently, the gas in the annular air cavity 322 enters the annular chamber 351 through the first air channel 352, pushing each slide plate 354 along the corresponding telescopic slide groove 353 toward the paraffin filling cavity 3 40 is slid on one side, so that each telescopic push rod 355 radially extends into the paraffin filling cavity 340, and each telescopic push rod 355 is used to circumferentially position the outer peripheral surface of the concrete specimen 600, so that the overall area of ​​the concrete specimen 600 is centered, and the lateral widths of various areas in the paraffin filling cavity 340 are made roughly the same. In this way, the wrapping thickness of the solidified paraffin on various parts of the concrete specimen 600 also tends to be consistent, which can effectively improve the consistency of the sealing effect of the outer peripheral surface of the concrete specimen 600.

[0060] Furthermore, considering that during the process of filling the wax filling cavity 340 with molten wax, due to the irregularity of the outer peripheral surface contour of the concrete specimen 600 and the high viscosity of the molten wax itself, as the liquid level of the molten wax continues to rise, air is easily trapped at the contact position between the wax and the concrete specimen 600 and inside the wax, resulting in bubbles inside the solidified wax, which affects the wrapping and sealing effect of the wax on the concrete specimen 600; for this purpose, please refer to Figure 3 , Figure 5 and Figure 6 A plurality of ultrasonic transducers 360 are arranged circumferentially in the paraffin filling cavity 340, and an ultrasonic generator 361 electrically connected to each ultrasonic transducer 360 is installed on the bottom plate 220;

[0061] It should be noted that the above-mentioned ultrasonic transducer 360 and ultrasonic generator 361 are prior arts. In the process of filling the paraffin filling cavity 340 with molten paraffin, the ultrasonic generator 361 converts the mains electricity into high-frequency oscillating ultrasonic electrical energy, thereby realizing the emission of ultrasonic waves. The ultrasonic transducer 360 converts the ultrasonic electrical energy generated by the ultrasonic generator 361 into high-frequency mechanical vibrations, thereby driving the molten paraffin in the paraffin filling cavity 340 to produce a vibration effect, causing the bubbles trapped inside the paraffin to float up and be discharged from the paraffin, thereby avoiding the presence of bubble defects in the solidified paraffin. At the same time, the molten paraffin can fill various areas of the paraffin filling cavity 340, effectively improving the wrapping and sealing effect of the paraffin on the outer peripheral surface of the concrete specimen 600.

[0062] In yet another embodiment, see Figure 8 and Fig. 9For the water pressure impermeability test of the concrete specimen 600, a water storage tank 430 is installed on the lifting plate 240, and a water injection channel 431 is connected between the water storage tank 430 and the interior of the upper sealing ring 420; a pressurizing chamber 441 is opened in the lifting plate 240, and the pressurizing chamber 441 is connected to the interior of the upper sealing ring 420, and a second air pump 440 is installed on the lifting plate 240, and a second air channel 443 is connected between the second air pump 440 and the pressurizing chamber 441;

[0063] Specifically, after the lifting plate 240 and the upper sealing ring 420 move downward to press and seal the upper end surface of the concrete specimen 600, the gas in the pressurizing chamber 441 is extracted through the second air pump 440, so that negative pressure is generated inside the pressurizing chamber 441 and the upper sealing ring 420, and the water in the water storage tank 430 can be sucked into the upper sealing ring 420. Then, the water injection channel 431 is closed, and the second air pump 440 is used to pressurize the pressurizing chamber 441, so that the water layer below can be pressurized to achieve water pressure seepage resistance testing of the upper end surface of the concrete specimen 600.

[0064] For further information, see Figure 8 and Fig. 9 In order to realize automatic water injection and water-gas isolation, a one-way valve 432 is installed at the connection between the water injection channel 431 and the interior of the upper sealing ring 420. The one-way valve 432 only allows the water injection channel 431 to be connected to the interior of the upper sealing ring 420; an elastic diaphragm 442 is provided at the connection between the pressurizing chamber 441 and the interior of the upper sealing ring 420;

[0065] Specifically, when the second air pump 440 sucks air into the pressurizing chamber 441, negative pressure is generated in the pressurizing chamber 441, so that the elastic diaphragm 442 is deformed and sunken into the pressurizing chamber 441, thereby generating negative pressure in the upper sealing ring 420, and the one-way valve 432 is forwardly conducted, so that the water in the water storage tank 430 can be sucked into the upper sealing ring 420 through the water injection channel 431; when the second air pump 440 inflates the pressurizing chamber 441, positive pressure is generated in the pressurizing chamber 441, so that the elastic diaphragm 442 expands and deforms into the upper sealing ring 420, thereby generating positive pressure in the upper sealing ring 420, and at this time, the one-way valve 432 is reversely closed, so that the water layer in the upper sealing ring 420 can be pressurized;

[0066] It is worth noting that the setting of the one-way valve 432 can effectively prevent the water in the upper sealing ring 420 from flowing back into the water storage tank 430, and at the same time prevent the pressure in the upper sealing ring 420 from leaking during the pressurization process, thereby ensuring the pressurization anti-seepage detection effect; the setting of the elastic diaphragm 442 can isolate water vapor, prevent the water in the upper sealing ring 420 from entering the pressurization chamber 441 or even the second air pump 440, thereby ensuring the stability of the pressurization process. In addition, the elastic diaphragm 442 can be made of soft materials such as silicone, and it can be adaptively deformed according to the air pressure difference on both sides.

[0067] In further embodiments, see Figure 1 In order to facilitate cleaning of the inside of the test piece placement unit 300 after testing, a filter plate 110 is detachably installed at the bottom of the test box 100, a suction pump 120 is installed on one side of the test box 100, an input end of the suction pump 120 is connected to the bottom of the test box 100 through a suction pipe 130, a filter 140 is installed on the suction pipe 130, and an output end of the suction pump 120 is connected to a flushing head 160 through a corrugated hose 150;

[0068] After the water-resistance test, the concrete specimen 600 is taken out from the placement tube 310, and the cleaning liquid at the bottom of the test box 100 is extracted by the suction pump 120 and pumped out from the flushing head 160, so that the inside of the placement tube 310 can be flushed to remove residual impurities and solidified and adhered paraffin; the filter plate 110 and the filter 140 can intercept and filter the impurities in the cleaning liquid, so as to facilitate the purification and reuse of the cleaning liquid.

[0069] For further information, see Figure 1 and Fig.10 In order to facilitate the removal of the concrete specimen 600 and the cleaning of the inside of the placement tube 310, the detection box 100 is symmetrically provided with flip units 500 on both sides. The flip units 500 include a mounting platform 510 fixed on the detection box 100, a flip shaft 520 rotatably mounted on the mounting platform 510, and a flip cylinder 540 vertically mounted on the mounting platform 510. One end of the flip shaft 520 is fixedly connected to the top plate 210, and a gear 530 is installed at one end of the flip shaft 520 away from the top plate 210. A rack 550 meshing with the gear 530 is installed at the output end of the flip cylinder 540;

[0070] Specifically, the rack 550 is driven to move vertically up and down by the flip cylinder 540, and the meshing transmission of the rack 550 and the gear 530 is utilized to drive the flip shaft 520 to rotate, thereby driving the top plate 210 to rotate synchronously, so as to realize the flipping of the entire installation unit 200 and the specimen placement unit 300; when taking out the concrete specimen 600, the specimen placement unit 300 can be flipped to an inverted state, thereby facilitating the concrete specimen 600 to fall out of the specimen placement tube 310, and at the same time, the inverted specimen placement tube 310 can also better flush out the impurities inside it.

[0071] In yet another embodiment, a method for using a device for detecting concrete working performance is provided, comprising the following steps:

[0072] S1, placing the concrete specimen 600 in the placing tube 310;

[0073] S2, the capping detection unit 400 moves downward, and uses the upper sealing ring 420 and the lower sealing ring 320 to seal the outer rings of the upper and lower end surfaces of the concrete specimen 600 respectively;

[0074] S3, squeeze the molten paraffin in the paraffin storage area 330 into the paraffin filling cavity 340, wait for the paraffin to cool and solidify, and perform paraffin sealing on the outer peripheral surface of the concrete specimen 600;

[0075] S4. Perform a water pressure impermeability test on the upper end surface of the concrete specimen 600.

[0076] The specific implementation methods of this embodiment are described above, but this embodiment is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Ordinary technicians in this field can also make many forms inspired by this embodiment, all of which are within the protection of this embodiment.

Claims

1. A device for detecting the working performance of concrete, comprising a detection box (100); characterized in that: Also includes: The installation unit (200) is arranged in the detection box (100), and comprises a top plate (210) and a bottom plate (220), wherein the top plate (210) and the bottom plate (220) are fixedly connected via a plurality of guide columns (230), a lifting plate (240) is slidably sleeved on the guide columns (230), and a lifting cylinder (250) for driving the lifting plate (240) is installed on the top plate (210); A specimen placement unit (300) is arranged on the upper end surface of the bottom plate (220), comprising a placement cylinder (310) for loading the concrete specimen (600) and a lower sealing ring (320) coaxially distributed in the placement cylinder (310), a paraffin filling cavity (340) being formed between the placement cylinder (310) and the concrete specimen (600), and a paraffin storage area (330) communicating with the paraffin filling cavity (340) being further arranged in the placement cylinder (310); A cover detection unit (400) is arranged on the lower end surface of the lifting plate (240), comprising an upper cover (410) adapted to the upper end slot (311) of the placement cylinder (310) and an upper sealing ring (420) coaxially distributed inside the upper cover (410), wherein a plurality of through holes (411) are circumferentially formed on the upper cover (410), and an annular sealing ring (421) is provided at the lower end of the upper sealing ring (420); The lower sealing ring (320) comprises an annular block (321) fixed on the bottom plate (220), an annular air cavity (322) is provided in the annular block (321), an annular air bag (323) is connected to the upper opening of the annular air cavity (322), and a vent hole (221) communicating with the inner side of the annular block (321) is provided on the bottom plate (220); A circumferential positioning member (350) is also provided in the placement tube (310), and the circumferential positioning member (350) includes an annular chamber (351) opened in the placement tube (310), a first air passage (352) is connected between the annular chamber (351) and the annular air cavity (322), and a plurality of rows of telescopic grooves (353) are circumferentially opened on the inner wall of the annular chamber (351) on one side facing the paraffin filling cavity (340), a slide plate (354) is slidably installed in the telescopic groove (353), and a telescopic push rod (355) extending into the paraffin filling cavity (340) is fixed on the slide plate (354).

2. A device for detecting concrete working performance according to claim 1, characterized in that: The paraffin storage area (330) comprises an annular storage body (331) arranged in the placement cylinder (310); the annular storage body (331) is connected to the bottom of the paraffin filling cavity (340) via a paraffin flow channel (332); a piston ring (335) is slidably installed in the annular storage body (331); a first air pump (333) is installed on the bottom plate (220); and an air pipe (334) is connected to the top of the annular storage body (331).

3. A device for detecting concrete working performance according to claim 2, characterized in that: A first annular heating plate (336) is disposed at the bottom of the annular warehouse body (331); and a second annular heating plate (341) is disposed in the paraffin filling cavity (340).

4. A device for detecting concrete working performance according to claim 1, characterized in that: A water storage tank (430) is installed on the lifting plate (240), and a water injection channel (431) is connected between the water storage tank (430) and the interior of the upper sealing ring (420); a pressurizing chamber (441) is provided in the lifting plate (240), and the pressurizing chamber (441) is connected to the interior of the upper sealing ring (420); a second air pump (440) is installed on the lifting plate (240), and a second air channel (443) is connected between the second air pump (440) and the pressurizing chamber (441).

5. A device for detecting concrete working performance according to claim 4, characterized in that: A one-way valve (432) is installed at the connection point between the water injection channel (431) and the interior of the upper sealing ring (420), and the one-way valve (432) only allows the water injection channel (431) to be connected to the interior of the upper sealing ring (420) on one side; and an elastic diaphragm (442) is provided at the connection point between the pressurizing chamber (441) and the interior of the upper sealing ring (420).

6. The device for detecting the working performance of concrete according to claim 1, characterized in that: A filter plate (110) is detachably mounted on the bottom of the detection box (100); a suction pump (120) is mounted on one side of the detection box (100); an input end of the suction pump (120) is connected to the bottom of the detection box (100) via a suction pipe (130); a filter (140) is mounted on the suction pipe (130); and an output end of the suction pump (120) is connected to a flushing head (160) via a corrugated hose (150).

7. A device for detecting concrete working performance according to claim 6, characterized in that: Flipping units (500) are symmetrically arranged on both sides of the detection box (100), and the flipping units (500) comprise a mounting platform (510) fixed on the detection box (100), a flipping shaft (520) rotatably mounted on the mounting platform (510), and a flipping cylinder (540) vertically mounted on the mounting platform (510), one end of the flipping shaft (520) being fixedly connected to the top plate (210), a gear (530) being mounted on one end of the flipping shaft (520) away from the top plate (210), and a rack (550) meshing with the gear (530) being mounted on the output end of the flipping cylinder (540).

8. A method for using the device for detecting concrete working performance according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1, placing a concrete test piece (600) in a placement cylinder (310); S2, the capping detection unit (400) moves downward, and uses the upper sealing ring (420) and the lower sealing ring (320) to seal the outer rings of the upper and lower end surfaces of the concrete specimen (600) respectively; S3, squeezing the molten paraffin in the paraffin storage area (330) into the paraffin filling cavity (340), and performing paraffin sealing on the outer peripheral surface of the concrete specimen (600) after the paraffin is cooled and solidified; S4. Perform a water pressure impermeability test on the upper end surface of the concrete specimen (600).

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