Concrete quality detection device for hydraulic engineering and detection method thereof

Abstract

The invention relates to the technical field of concrete quality detection, in particular to a concrete quality detection device for hydraulic engineering and a detection method thereof. According to the technical scheme, the concrete quality detection device for the water conservancy project comprises a slump cone, a heat insulation plate, an indication component and an electric heating rod; the energy storage heat conduction oil is heated through the electric heating rod, then the inner wall of the slump cone is preheated through the heated energy storage heat conduction oil, after the inner wall of the energy storage heat conduction oil is heated to a preset temperature range, the indicating component can also send a reminding signal to a detector in time, and the detector can timely pour concrete into the slump cone and meanwhile, the concrete can be conveniently detected. The situation that the water in the to-be-detected concrete poured into the slump cone freezes in the detection process, and consequently the detection result deviates can be effectively avoided, and the accuracy of the concrete quality detection result is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of concrete quality detection, and in particular relates to a concrete quality detection device for water conservancy engineering and a detection method thereof. Background Art

[0002] Concrete is an indispensable raw material in water conservancy construction. Unqualified concrete used in water conservancy and other projects will cause safety hazards and quality accidents to the quality of the project structure. Therefore, the quality of concrete should be tested before use to prevent unqualified concrete from being used in houses, roads, bridges and water conservancy projects. In order to ensure the quality of water conservancy construction projects, it is necessary to extract a part of the concrete used in water conservancy construction projects for slump testing. The slump test results can reflect the flow properties and overall plasticity of concrete after the mixing process. Only through slump testing can the concrete used in water conservancy construction projects be guaranteed to reach the best state during pouring, so as to ensure the fluidity, cohesion, water retention, etc. of the concrete during the construction process.

[0003] The document with the prior art publication number CN218917401U provides a concrete quality detection device for water conservancy projects. When the device is in use, the bottom circle of the device is fitted to the ground, and the connecting mechanism is pulled to straighten it so that its length exceeds twice the height of the slump cone. The feed hopper is placed on the top of the slump cone, and the material enters the slump cone through the feed hopper. After the material is placed, the feed hopper is taken out, and the handle is turned. The handle drives the shaft to rotate, and the shaft drives the slump cone to rise. At this time, the measuring rod is turned so that it is located at the top of the material and the slump can be measured corresponding to the scale.

[0004] Therefore, when using the above-mentioned prior art to perform slump detection on concrete used in water conservancy construction projects in cold winter seasons and under low ambient temperature conditions, after completing a series of operations such as pouring concrete into the slump cone in batches, scraping the concrete on the top of the cone, and finally lifting the slump cone upwards, the moisture in the concrete to be tested in the cone is prone to freezing during the detection process, thereby affecting the deviation of the detection results and reducing the accuracy of the concrete quality detection results; a concrete quality detection device and detection method for water conservancy projects can be designed to solve the above-mentioned problems. Summary of the invention

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a concrete quality detection device for water conservancy projects and a detection method thereof, which aims to solve the technical problem that when performing the existing slump detection operation, after completing a series of operations such as pouring concrete into the slump cone in batches, scraping the concrete on the top of the cone, and finally lifting the slump cone upwards, the moisture in the concrete to be tested in the cone is prone to freezing during the detection process, thereby affecting the deviation of the detection result.

[0006] In order to solve the above technical problems, the present invention provides a concrete quality detection device for water conservancy projects, which includes a slump cone, an insulation board, an indicating component and an electric heating rod; the inner wall of the slump cone is coated with an anti-sticking coating layer, a heat insulation board is provided at the lower opening of the slump cone, a circle of thermal insulation layer is provided inside the slump cone, and a circle of conical inner cavity is also provided inside the slump cone, and a plurality of electric heating rods are evenly arranged and connected in the conical inner cavity, and the conical inner cavity is also filled with energy storage heat transfer oil. The side wall of the slump cone is also provided with an indicating component that can send a reminder signal to the detection personnel to fill the slump cone with fluid concrete used for water conservancy project construction when the electric heating rod heats the energy storage heat transfer oil to a predetermined temperature range, and the indicating component includes a heat-sensitive element and a cooperative component that can work in conjunction with the heat-sensitive element.

[0007] Preferably, the sensing element includes an insulating layer connected to the curved side wall of the slump cone, a side of the insulating layer away from the slump cone is connected to a base, an upper slot chamber and a lower slot chamber are respectively provided inside the base, and the upper slot chamber is located above the lower slot chamber, a baffle ring cover is connected to the top of the base corresponding to the position of the upper slot chamber, a trigger terminal is connected to the bottom wall of the lower slot chamber, a passive trigger column matched with the inner diameter of the baffle ring cover is provided above the trigger terminal, and the top of the passive trigger column passes through the lower slot chamber, the upper slot chamber and the inside of the baffle ring cover respectively, when the bottom end of the passive trigger column contacts the top end of the trigger terminal, the electric heating rod is triggered to turn on, and when the bottom end of the passive trigger column is separated from the top end of the trigger terminal, the electric heating rod is triggered to turn off, and the insulation layer is arranged around the outer periphery of the conical inner cavity.

[0008] Preferably, an indicator layer is arranged around the upper part of the side wall of the passive trigger column, and an indicator paint layer is applied inside the indicator layer. An annular slider is fixedly mounted on the outer periphery of the passive trigger column, and the interior of the upper groove chamber is also filled with low-temperature temperature-sensitive paraffin. A heat-conducting part is arranged on the side of the base close to the insulation layer, and the annular slider is slidably connected to the interior of the upper groove chamber, and the annular slider is located above the low-temperature temperature-sensitive paraffin.

[0009] Preferably, the heat conductor includes an insulating sleeve with one end connected to the inside of the base and the other end passing through the insulating layer and the thermal insulation layer and penetrating into the conical inner cavity inside the slump cone. The inside of the insulating sleeve is connected with a metal thermal wire. The insulating layer and the insulating sleeve are both made of insulating materials. The end of the insulating sleeve away from the conical inner cavity extends into the interior of the upper groove chamber, and one end of the metal thermal wire is inserted into the interior of the low-temperature temperature-sensitive paraffin, and the other end extends into the interior of the energy storage heat transfer oil.

[0010] Preferably, the cooperative component includes a lifting wedge block arranged above the top of the passive trigger column, the bottom end of the lifting wedge block is connected to a telescopic spring, a square guide rod is inserted inside the telescopic spring, the inner wall of the telescopic spring is provided with a spring rubber damping layer, and the square guide rod is a rectangular structure, a guide groove is opened at the bottom end of the lifting wedge block corresponding to the position of the square guide rod, and the top end of the square guide rod is movably inserted in the guide groove, an L-shaped frame is provided above the lifting wedge block, the L-shaped frame includes a horizontal column and a vertical column, the bottom end of the vertical column is provided with an arc head, the end of the horizontal column is connected to a scraper, and the bottom end of the scraper is flush with the top of the slump cone, and a guide cantilever is inserted through the upper part of the vertical column of the L-shaped frame.

[0011] Preferably, the guide cantilever is a rectangular structure, and one end of the guide cantilever is connected to the curved side wall of the slump cone, a limit screw is threaded through the horizontal column of the L-shaped frame, and a positioning groove is provided on the top of the guide cantilever for the bottom end of the limit screw to be snapped into.

[0012] Preferably, the bottom end of the telescopic spring is connected to the top end of the passive trigger column, the bottom end of the square guide rod is fixedly connected to the top end of the passive trigger column, and the arc head is tightly attached to the inclined surface of the jacking wedge block.

[0013] A detection method for a concrete quality detection device for a water conservancy project is provided, and the steps are as follows: S1. Place the insulation board on the water surface, and then place the slump cone on the insulation board; S2. The energy storage heat transfer oil is heated by an electric heating rod. After the energy storage heat transfer oil continuously absorbs heat energy, its temperature gradually increases, so that the inner wall of the slump cone can be preheated in cold seasons and before the fluid concrete used for water conservancy project construction is filled in the slump cone; S3, the heat-conducting part in the heat-sensitive element continuously transfers the heat energy accumulated in the energy-storage heat-conducting oil during the heating process to the low-temperature temperature-sensitive paraffin; S4. When the energy storage heat transfer oil is heated to the phase change temperature of the low-temperature temperature-sensitive paraffin, that is, 18-22°C, the volume of the low-temperature temperature-sensitive paraffin expands rapidly and pushes the passive trigger column upward through the annular slider. At this time, the bottom end of the passive trigger column is separated from the top end of the trigger terminal, triggering the electric heating rod to turn off, and the heated energy storage heat transfer oil is used to reversely insulate the inner wall of the slump cylinder; S5. The passive trigger column that moves upward with the annular slider drives the indicating paint surface layer to be exposed from the inside of the shielding ring cover. The inspector can quickly determine that the inner wall of the slump cone has been preheated to the set temperature based on the exposed indicating paint surface layer. S6. The testing personnel load the concrete into the slump cone from the top opening of the slump cone in batches, and the height of each loading is 1 / 3 of the height of the slump cone, and the concrete to be tested loaded into the slump cone is subjected to heat preservation treatment through the inner wall of the slump cone that has been preheated; S7, when the low-temperature temperature-sensitive paraffin wax that expands due to heat pushes the indicating paint layer to continuously emerge from the inside of the shielding ring cover, under the limiting action of the limiting screw, the top end of the passive trigger column continuously squeezes the telescopic spring of the cooperative component; S8, loosen the limiting screw rod to make the end of the limiting screw rod disengage from the positioning groove. Under the elastic force of the compressed telescopic spring, the lifting wedge block continuously drives the scraper bar through the arc head to scrape off the excess concrete overflowing from the top opening of the slump cone, and smooth the concrete along the top opening of the slump cone; S9. Lift the slump cone vertically and steadily. When the concrete sample to be tested stops collapsing or the slump time reaches 30s, use a steel ruler to measure the height difference between the vertical height of the slump cone and the highest point of the concrete specimen after collapse, which is taken as the slump value of the concrete mixture.

[0014] Beneficial effects of the present invention: 1. Heat the energy storage heat transfer oil through the electric heating rod, and then preheat the inner wall of the slump cone with the heated energy storage heat transfer oil. When the inner wall of the energy storage heat transfer oil is heated to the predetermined temperature range, the indicator component can also send a reminder signal to the tester in time. The tester can pour the concrete into the slump cone in time, and can also effectively avoid the moisture in the concrete to be tested poured into the slump cone from freezing during the test process, thereby causing deviations in the test results, thereby ensuring the accuracy of the concrete quality test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 1 A schematic diagram of the enlarged local structure of part A; Figure 3 It is a schematic diagram of the overall cross-sectional structure of the present invention; Figure 4 It is a structural schematic diagram of the indicating component in the present invention; Figure 5 For the present invention Figure 3 A schematic diagram of the enlarged local structure of part B.

[0016] Explanation of the reference numerals: 1. slump cone; 2. insulation board; 3. anti-sticking coating layer; 401. base; 402. shielding ring cover; 403. passive trigger column; 404. indicating paint layer; 405. metal thermal wire; 406. trigger terminal; 407. low-temperature temperature-sensitive paraffin; 408. annular slider; 409. insulation layer; 410. insulation sleeve; 501. lifting wedge block; 503. limiting screw; 504. L-shaped frame; 505. scraper strip; 506. square guide rod; 507. telescopic spring; 508. arc head; 6. electric heating rod; 7. energy storage heat transfer oil; 8. insulation layer. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0018] See also Figure 1-Figure 5 The present invention provides a concrete quality detection device for water conservancy projects, which includes a slump cone 1, a heat insulation board 2, an indicating component and an electric heating rod 6; the inner wall of the slump cone 1 is coated with an anti-sticking coating layer 3, a heat insulation board 2 is provided at the lower opening of the slump cone 1, a circle of thermal insulation layer 8 is provided inside the slump cone 1, and a circle of conical inner cavity is also provided inside the slump cone 1, and a plurality of electric heating rods 6 are evenly arranged and connected in the conical inner cavity, and the conical inner cavity is also filled with energy storage heat transfer oil 7. The side wall of the slump cone 1 is also provided with an indicating component that can send a reminder signal to the detection personnel to fill the slump cone 1 with fluid concrete used for water conservancy project construction when the electric heating rod 6 heats the energy storage heat transfer oil 7 to a predetermined temperature range, and the indicating component includes a heat-sensitive element and a cooperative component that can work in conjunction with the heat-sensitive element.

[0019] See also Figure 2-Figure 4 In this embodiment, a circle of indicating layer is arranged around the upper part of the side wall of the passive trigger column 403, and an indicating paint layer 404 is applied inside the indicating layer. An annular slider 408 is sleeved and fixed on the outer periphery of the passive trigger column 403. The interior of the upper groove chamber is also filled with low-temperature temperature-sensitive paraffin 407. A heat-conducting member is arranged on one side of the base 401 close to the insulation layer 409. The annular slider 408 is slidably connected to the interior of the upper groove chamber, and the annular slider 408 is above the low-temperature temperature-sensitive paraffin 407. The heat-conducting member includes one end connected to An insulating sleeve 410 is connected to the inside of the base 401, and the other end passes through the insulating layer 409 and the thermal insulation layer 8 and penetrates into the conical inner cavity inside the slump cone 1. The inside of the insulating sleeve 410 is connected with a metal thermal wire 405. The insulating layer 409 and the insulating sleeve 410 are both made of insulating materials. One end of the insulating sleeve 410 away from the conical inner cavity extends into the interior of the upper groove chamber, and one end of the metal thermal wire 405 is inserted into the interior of the low-temperature temperature-sensitive paraffin 407, and the other end extends into the interior of the energy storage heat transfer oil 7.

[0020] See also Figure 3-Figure 4In this embodiment, the cooperation component includes a lifting wedge block 501 arranged above the top of the passive trigger column 403, the bottom end of the lifting wedge block 501 is connected to a telescopic spring 507, a square guide rod 506 is inserted inside the telescopic spring 507, the inner wall of the telescopic spring 507 is provided with a spring rubber damping layer, and the square guide rod 506 is a rectangular parallelepiped structure, a guide groove is opened at the bottom end of the lifting wedge block 501 corresponding to the position of the square guide rod 506, and the top end of the square guide rod 506 is movably inserted inside the guide groove, and an L-shaped frame 504 is provided above the lifting wedge block 501, L The L-shaped frame 504 includes a horizontal column and a vertical column. The bottom end of the vertical column is provided with an arc head 508. The end of the horizontal column is connected to a scraper bar 505, and the bottom end of the scraper bar 505 is flush with the top of the slump cone 1. A guide cantilever is inserted through the upper part of the vertical column of the L-shaped frame 504. The guide cantilever is a rectangular structure, and one end of the guide cantilever is connected to the curved side wall of the slump cone 1. The horizontal column of the L-shaped frame 504 is threadedly penetrated and connected with a limiting screw 503. The top of the guide cantilever is provided with a positioning groove into which the bottom end of the limiting screw 503 can be snapped.

[0021] See also Figure 2-Figure 5 In this embodiment, the bottom end of the telescopic spring 507 is connected to the top end of the passive trigger column 403, the bottom end of the square guide rod 506 is fixedly connected to the top end of the passive trigger column 403, and the arc head 508 is tightly attached to the inclined surface of the lifting wedge block 501.

[0022] It is specifically supplemented that the heat-conducting member in the heat-sensitive element continuously conducts the heat energy accumulated in the energy storage heat-conducting oil 7 during the heating process to the low-temperature temperature-sensitive paraffin 407. When the energy storage heat-conducting oil 7 is heated to the phase change temperature of the low-temperature temperature-sensitive paraffin 407, that is, 18-22°C (that is, the appropriate temperature range for concrete slump detection), the volume of the low-temperature temperature-sensitive paraffin 407 expands rapidly and pushes the passive trigger column 403 upward through the annular slider 408. At this time, the bottom end of the passive trigger column 403 is separated from the top end of the trigger terminal 406, triggering the electric heating rod 6 to turn off, and the heated energy storage heat-conducting oil 7 is used to insulate the inner wall of the slump cone 1 in the reverse direction, so that during the concrete quality detection work, the time for the electric heating rod 6 to be turned on can be effectively shortened, saving electricity, and the temperature of the inner wall of the slump cone 1 can be maintained stable for a period of time after the electric heating rod 6 is turned off, thereby ensuring the stability of the temperature of the concrete loaded into the slump cone 1.

[0023] Place the insulation board 2 on the horizontal ground, and then place the slump cone 1 on the insulation board 2. The insulation board 2 separates the slump cone 1 from the ground and prevents the cold ground in cold seasons from freezing the moisture in the concrete to be tested poured into the slump cone 1, further ensuring the stability of the temperature of the concrete filled into the slump cone 1.

[0024] When the electric heating rod 6 is turned off and the temperature of the energy storage heat transfer oil 7 gradually decreases, the low-temperature temperature-sensitive paraffin 407 gradually becomes cold and shrinks in volume, and under the elastic force of the telescopic spring 507, the indicating paint layer 404 following the downward movement of the passive trigger column 403 moves downward to the inside of the shielding ring cover 402 and is shielded by the shielding ring cover 402, and the bottom end of the passive trigger column 403 contacts the top of the trigger terminal 406 again during the downward movement of the passive trigger column 403 and triggers the electric heating rod 6 to turn on again, so that the electric heating rod 6 can heat the energy storage heat transfer oil 7 again, and then the gradually heated energy storage heat transfer oil 7 heats the inner wall of the slump cone 1, so that when the present invention performs slump detection on concrete used in water conservancy construction projects in the severe cold environment in winter, the temperature of the concrete loaded into the slump cone 1 can be effectively maintained within the appropriate temperature range for slump detection, i.e., between 18-22°C, and the accuracy of the concrete quality detection results can be effectively guaranteed.

[0025] In the process that the low-temperature temperature-sensitive paraffin wax 407 that expands due to heat pushes the indicating paint surface layer 404 to be continuously exposed from the inside of the shielding ring cover 402, under the limiting action of the limiting screw 503, the top end of the passive trigger column 403 continuously squeezes the telescopic spring 507 of the cooperative component, and then the limiting screw 503 is loosened to make the end of the limiting screw 503 disengage from the positioning groove. Under the elastic force of the squeezed and compressed telescopic spring 507, the lifting wedge block 501 continuously drives the scraper 505 through the arc head 508 to remove the liquid overflowing from the top opening of the slump cone 1. The excess concrete that comes out is scraped off, and the concrete is smoothed along the top opening of the slump cone 1, so that when the thermal sensing element reminds the inspector, it can simultaneously provide the cooperative component with elastic power for smoothing the concrete overflowing from the top opening of the slump cone 1, and it is convenient for the subsequent inspectors to automatically smooth the concrete along the top opening of the slump cone 1 through the cooperative component. While ensuring that the moisture in the concrete to be tested will not be frozen due to cold during the concrete testing process, it is also beneficial to further improve the work efficiency of concrete quality testing.

[0026] A detection method for a concrete quality detection device for a water conservancy project is provided, and the steps are as follows: S1, placing the insulation board 2 on the water surface, and then placing the slump cone 1 on the insulation board 2; S2, heating the energy storage heat transfer oil 7 by the electric heating rod 6, the temperature of the energy storage heat transfer oil 7 gradually increases after continuously absorbing heat energy, so that the inner wall of the slump cone 1 can be preheated in cold seasons and before the fluid concrete used for water conservancy project construction is filled in the slump cone 1; S3, the heat-conducting member in the heat-sensitive element continuously conducts the heat energy accumulated in the energy-storage heat-conducting oil 7 during the heating process to the low-temperature temperature-sensitive paraffin 407; S4, when the energy storage heat transfer oil 7 is heated to the phase change temperature of the low temperature temperature sensitive paraffin 407, that is, 18-22°C, the volume of the low temperature temperature sensitive paraffin 407 expands rapidly and pushes the passive trigger column 403 upward through the annular slider 408. At this time, the bottom end of the passive trigger column 403 is separated from the top end of the trigger terminal 406, triggering the electric heating rod 6 to turn off, and the heated energy storage heat transfer oil 7 is used to reversely insulate the inner wall of the slump cone 1; S5, the passive trigger column 403 moving upward with the annular slider 408 drives the indicating paint layer 404 to be exposed from the inside of the shielding ring cover 402, and the inspector quickly determines that the inner wall of the slump cone 1 has been preheated to the set temperature based on the exposed indicating paint layer 404; S6. The testing personnel load the concrete into the slump cone 1 from the top opening of the slump cone 1 in batches, and each loading height is 1 / 3 of the height of the slump cone 1, and the concrete to be tested loaded into the slump cone 1 is subjected to heat preservation and heating treatment through the inner wall of the slump cone 1 which has been preheated; S7, the low-temperature temperature-sensitive paraffin 407 that expands due to heat pushes the indicating paint layer 404 to continuously be exposed from the inside of the shielding ring cover 402. Under the limiting action of the limiting screw 503, the top of the passive trigger column 403 continuously squeezes the telescopic spring 507 of the cooperative component; S8, loosen the limiting screw 503, so that the end of the limiting screw 503 is disengaged from the positioning groove, and under the elastic force of the compressed telescopic spring 507, the lifting wedge block 501 continuously drives the scraper 505 through the arc head 508 to scrape off the excess concrete overflowing from the top opening of the slump cone 1, and smooth the concrete along the top opening of the slump cone 1; S9. Lift the slump cone 1 vertically and steadily. When the concrete sample to be tested stops collapsing or the slump time reaches 30s, use a steel ruler to measure the height difference between the vertical height of the slump cone 1 and the highest point of the concrete sample after collapse, which is taken as the slump value of the concrete mixture.

[0027] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the spirit of the present invention.

Claims

1. A concrete quality detection device for water conservancy projects, characterized in that: The method is implemented using a concrete quality detection device for water conservancy projects, the device comprising a slump cone (1), a heat insulation board (2), an indicating component and an electric heating rod (6); the inner wall of the slump cone (1) is coated with an anti-sticking coating layer (3); a heat insulation board (2) is provided at the lower opening of the slump cone (1); a circle of thermal insulation layer (8) is provided inside the slump cone (1); a circle of conical inner cavity is also provided inside the slump cone (1); a plurality of electric heating rods (6) are evenly arranged and connected in the conical inner cavity; the conical inner cavity is also filled with energy storage heat transfer oil (7); the side wall of the slump cone (1) is also provided with an indicating component which can send a reminder signal to the detection personnel to fill the slump cone (1) with fluid concrete used for water conservancy project construction when the electric heating rod (6) heats the energy storage heat transfer oil (7) to a predetermined temperature range; the indicating component comprises a heat sensing element and a cooperative component which can cooperate with the heat sensing element to work.

2. A concrete quality detection device for water conservancy engineering according to claim 1, characterized in that: The sensing element comprises an insulating layer (409) connected to the curved side wall of the slump cone (1); a surface of the insulating layer (409) away from the slump cone (1) is connected to a base (401); an upper groove chamber and a lower groove chamber are respectively provided inside the base (401); the upper groove chamber is located above the lower groove chamber; a shielding ring cover (402) is connected to the top of the base (401) at a position corresponding to the position of the upper groove chamber; a trigger terminal (406) is connected to the bottom wall of the lower groove chamber; and a trigger terminal (406) is provided above the trigger terminal (406). A passive trigger column (403) is provided which is matched with the inner diameter of the shielding ring cover (402), and the top end of the passive trigger column (403) passes through the lower groove chamber, the upper groove chamber and the inside of the shielding ring cover (402) respectively. When the bottom end of the passive trigger column (403) contacts the top end of the trigger terminal (406), the electric heating rod (6) is triggered to turn on. When the bottom end of the passive trigger column (403) is separated from the top end of the trigger terminal (406), the electric heating rod (6) is triggered to turn off. The heat insulation layer (8) is arranged around the outer periphery of the conical inner cavity.

3. A concrete quality detection device for water conservancy engineering according to claim 2, characterized in that: An indicating layer is provided around the upper part of the side wall of the passive trigger column (403), and an indicating paint layer (404) is applied inside the indicating layer. An annular slider (408) is sleeved and fixed on the outer periphery of the passive trigger column (403), and the interior of the upper groove chamber is also filled with low-temperature temperature-sensitive paraffin wax (407). A heat-conducting member is provided on one side of the base (401) close to the insulation layer (409), and the annular slider (408) is slidably connected to the interior of the upper groove chamber, and the annular slider (408) is located above the low-temperature temperature-sensitive paraffin wax (407).

4. A concrete quality detection device for water conservancy engineering according to claim 2, characterized in that: The heat conducting member comprises a heat insulating sleeve (410) having one end connected to the inside of the base (401) and the other end passing through the heat insulating layer (409) and the heat insulating layer (8) and penetrating into the conical inner cavity inside the slump cone (1). The inside of the heat insulating sleeve (410) is connected with a metal heat conductive wire (405). The heat insulating layer (409) and the heat insulating sleeve (410) are both made of heat insulating material. The end of the heat insulating sleeve (410) away from the conical inner cavity extends into the interior of the upper tank chamber, and one end of the metal heat conductive wire (405) is inserted into the interior of the low-temperature temperature-sensitive paraffin wax (407), and the other end extends into the interior of the energy storage heat transfer oil (7).

5. The concrete quality detection device for water conservancy engineering according to claim 1 is characterized in that: The cooperation component comprises a lifting wedge block (501) arranged above the top of the passive trigger column (403); the bottom end of the lifting wedge block (501) is connected to a telescopic spring (507); a square guide rod (506) is inserted into the interior of the telescopic spring (507); a spring rubber damping layer is provided on the inner wall of the telescopic spring (507); the square guide rod (506) is a rectangular parallelepiped structure; a guide groove is provided at the bottom end of the lifting wedge block (501) corresponding to the position of the square guide rod (506); The top end of the square guide rod (506) is movably inserted into the guide groove. An L-shaped frame (504) is provided above the lifting wedge block (501). The L-shaped frame (504) includes a horizontal column and a vertical column. The bottom end of the vertical column is provided with an arc head (508). The end of the horizontal column is connected to a scraper bar (505), and the bottom end of the scraper bar (505) is flush with the top end of the slump cone (1). A guide cantilever is inserted through the upper part of the vertical column of the L-shaped frame (504).

6. A concrete quality detection device for water conservancy engineering according to claim 5, characterized in that: The guide cantilever is a rectangular parallelepiped structure, and one end of the guide cantilever is connected to the curved side wall of the slump cone (1). The thread on the horizontal column of the L-shaped frame (504) penetrates and connects to the limiting screw (503). The top of the guide cantilever is provided with a positioning groove into which the bottom end of the limiting screw (503) can be snapped.

7. A concrete quality detection device for water conservancy engineering according to claim 5, characterized in that: The bottom end of the telescopic spring (507) is connected to the top end of the passive trigger column (403), the bottom end of the square guide rod (506) is fixedly connected to the top end of the passive trigger column (403), and the arc head (508) is closely attached to the inclined surface of the lifting wedge block (501).

8. A method for detecting the quality of concrete for water conservancy projects according to claim 1, characterized in that: The following steps are involved: S1, placing the insulation board (2) on the water surface, and then placing the slump cone (1) on the insulation board (2); S2, heating the energy storage heat transfer oil (7) by means of an electric heating rod (6), so that the temperature of the energy storage heat transfer oil (7) gradually increases after continuously absorbing heat energy, so that the inner wall of the slump cone (1) can be preheated in cold seasons and before the fluid concrete used for water conservancy project construction is filled into the slump cone (1); S3, the heat conducting element in the heat-sensitive element continuously conducts the heat energy accumulated in the energy storage heat-conducting oil (7) during the heating process to the low-temperature temperature-sensitive paraffin (407); S4. When the energy storage heat transfer oil (7) is heated to the phase change temperature of the low temperature temperature sensitive paraffin (407), i.e., 18-22°C, the volume of the low temperature temperature sensitive paraffin (407) expands rapidly and pushes the passive trigger column (403) upward through the annular slider (408). At this time, the bottom end of the passive trigger column (403) is separated from the top end of the trigger terminal (406), triggering the electric heating rod (6) to turn off, and the heated energy storage heat transfer oil (7) is used to reversely insulate the inner wall of the slump cone (1); S5, the passive trigger column (403) moving upward with the annular slider (408) drives the indicating paint surface layer (404) to be exposed from the inside of the shielding ring cover (402), and the inspection personnel quickly judge that the inner wall of the slump cone (1) has been preheated to the set temperature based on the exposed indicating paint surface layer (404); S6. The testing personnel loads the concrete into the slump cone (1) from the top opening of the slump cone (1) in batches, and each loading height is 1 / 3 of the height of the slump cone (1), and the concrete to be tested loaded into the slump cone (1) is subjected to heat preservation and heating treatment through the inner wall of the slump cone (1) that has been preheated; S7, when the low-temperature temperature-sensitive paraffin wax (407) expands due to heat and pushes the indicating paint layer (404) to continuously emerge from the inside of the shielding ring cover (402), under the limiting action of the limiting screw (503), the top end of the passive trigger column (403) continuously squeezes the telescopic spring (507) of the cooperative component; S8, loosening the limiting screw (503) so that the end of the limiting screw (503) is disengaged from the positioning groove, and under the elastic force of the compressed telescopic spring (507), the lifting wedge block (501) continuously drives the scraper (505) through the arc head (508) to scrape off the excess concrete overflowing from the top opening of the slump cone (1), and smooth the concrete along the top opening of the slump cone (1); S9. Lift the slump cone (1) vertically and steadily. When the concrete sample to be tested stops collapsing or the slump time reaches 30 seconds, use a steel ruler to measure the height difference between the vertical height of the slump cone (1) and the highest point of the concrete sample after collapse, which is taken as the slump value of the concrete mixture.

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