Tunnel lining concrete durability test device

Abstract

The invention discloses a tunnel lining concrete durability test device, and particularly relates to the field of concrete detection.The tunnel lining concrete durability test device comprises a detection mechanism, the detection mechanism comprises a base, a top frame is fixedly installed on the base, a stretching detection assembly is arranged between the base and the top frame, and the stretching detection assembly comprises a linear driving assembly and two clamping assemblies; the two clamping assemblies are fixedly arranged at the output end of the linear driving assembly and the base respectively, and the two clamping assemblies are used for clamping the two ends of the concrete test piece respectively; an extrusion detection assembly is further arranged on the base, the extrusion detection assembly comprises two clamping plates capable of synchronously moving in different directions, and the extrusion detection assembly extrudes the concrete test piece through the two clamping plates for extrusion detection. By arranging the tensile detection assembly and the extrusion detection assembly, auxiliary centering positioning can be performed on the concrete test piece through the extrusion detection assembly and the tensile detection assembly, and automatic tensile and extrusion detection can be performed on the concrete test piece.

Description

Technical Field

[0001] The present invention relates to the technical field of concrete detection, and more particularly to a tunnel lining concrete durability testing device. Background Art

[0002] Concrete is a general term for engineering composite materials composed of aggregates bonded together by a cementitious material. The term "concrete" generally refers to cement as the binder, sand and stone as aggregates, mixed with water (which may contain admixtures and additives) in a specific proportion, and then mixed to form cement concrete, also known as ordinary concrete. Durability testing of concrete is often required to ensure construction quality.

[0003] Currently, when conducting tensile tests on concrete specimens, the test device usually consists of a base, clamps at both ends, a tensile rod and a loading instrument. The specimen is fixed between the clamps at both ends of the device. During the test, the tensile rod applies tension outward through the loading instrument to test the tensile strength of the concrete specimen. Before the test, technicians manually adjust the position of the specimen and fix it between the clamps. However, manual adjustment of the specimen is prone to human errors, resulting in the specimen position not being accurately aligned or the clamp being offset when fixing the specimen, and the specimen failing to maintain a relatively horizontal and stable state. When the tensile rod applies tension, the stress states at both ends of the specimen are asymmetric, resulting in concentrated tension at one end and insufficient stress at the other end. This force imbalance will cause the concrete specimen to crack or break prematurely before reaching the actual destructive strength, and the test results will lose accuracy and repeatability.

[0004] Moreover, the test device can only apply tensile force outward through the tensile rod and cannot perform extrusion force (i.e., compressive strength) testing on concrete specimens. This limits the scope of application of the test when it is necessary to verify the performance of concrete specimens under extrusion conditions (such as compressive strength or compression deformation). The testing process also requires manual adjustments by workers, which is time-consuming, labor-intensive, and inconvenient to use. Summary of the Invention

[0005] The present invention provides a tunnel lining concrete durability test device to solve the problem that the existing concrete testing device fails to maintain relative stability when testing concrete specimens, resulting in unbalanced forces at both ends of the device and can only be stretched outward without testing the extrusion force of the concrete specimens. The device has a small scope of application and the testing process requires manual adjustment by workers, which is time-consuming and labor-intensive and inconvenient to use.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a tunnel lining concrete durability test device, comprising: a detection mechanism, the detection mechanism comprising a base, a top frame fixedly mounted on the base, a tensile detection assembly disposed between the base and the top frame, the tensile detection assembly comprising a linear drive assembly and two clamping assemblies, the two clamping assemblies being fixedly disposed on an output end of the linear drive assembly and the base, respectively, and the two clamping assemblies being used to clamp two ends of a concrete specimen, respectively; An extrusion detection component is also provided on the base. The extrusion detection component includes two clamping plates that can move synchronously in opposite directions. The extrusion detection component squeezes the concrete specimen through the two clamping plates to perform extrusion detection.

[0007] In a preferred embodiment, the clamping assembly includes a fixed seat fixedly mounted on the output end of the linear drive assembly, a push-pull disk capable of vertical linear movement is provided in the fixed seat, two clamping seats are slidingly provided in the fixed seat, and the contact surfaces between the two clamping seats and the fixed seat are inclined surfaces, and the push-pull disk is in movable contact with the two clamping seats.

[0008] In a preferred embodiment, the extrusion detection assembly includes two fixed support rods, two splints are slidably arranged on the corresponding fixed support rods, a driving member is arranged in the base, a guide rod is installed at the output end of the driving member, a guide opening is opened on the guide rod, and the guide opening is inclined, a fixed shaft is fixedly arranged on the splint, and the guide rod is movably sleeved on the fixed shaft through the guide opening.

[0009] In a preferred embodiment, a detection housing is further provided on the top frame, an air inlet pipe is provided at the air inlet end of the detection housing, an air extraction component and a detection component are provided in the detection housing, and the air extraction component draws the air to be tested into the detection housing through the air inlet pipe by suction; The air inlet pipe includes a heating section, a heating mechanism is provided in the heating section, the heating mechanism includes a heating component, the heating component is provided in the heating section, and the heating component is used to dry the air to be detected; The heating mechanism also includes two control valves, which are respectively located at the air inlet and outlet ends of the heating section. A plurality of humidity sensors are arranged in a circular array on the inner wall of the heating section. During detection, the exhaust component draws the air to be detected into the heating section, the two control valves are closed, and the humidity sensor detects the real-time humidity of the air to be detected in the heating section. When the humidity sensor detects that the humidity value of the air to be detected in the heating section is lower than the threshold, the two control valves are opened, and the air to be detected enters the detection component for detection.

[0010] In a preferred embodiment, the air intake pipe also includes a separation section, a separation mechanism is provided in the separation section, the separation mechanism includes a guide seat, the guide seat is fixedly provided in the separation section, a separation frame is provided on the guide seat, a filter element and an adsorption element are provided on the separation frame, the filter element is used to filter particulate matter in the air, and the adsorption element is used to adsorb water vapor in the air.

[0011] In a preferred embodiment, the air inlet pipe also includes a cooling section, a cooling mechanism is provided in the cooling section, the cooling mechanism includes a cooling channel, the cooling channel is opened in the cooling section, and a liquid inlet pipe and a liquid outlet pipe are also provided on the cooling section. The liquid inlet pipe is connected to the liquid inlet end of the cooling channel, and the liquid inlet end of the liquid inlet pipe is connected to a liquid delivery component, and the liquid outlet pipe is connected to the liquid outlet end of the cooling channel.

[0012] In a preferred embodiment, the air intake pipe further includes a drainage section, in which a drainage component is provided, and the drainage component is used to provide additional intake air flow to the air intake pipe.

[0013] In a preferred embodiment, a partition mechanism is further provided in the drainage section, and the partition mechanism is used to form an air curtain at the air inlet end of the air inlet pipe.

[0014] In a preferred embodiment, the separation mechanism includes a guide channel, which is opened at the bottom of the drainage section, and the air outlet end of the guide channel is annularly arranged, and an air supply pipe is provided on the drainage section, the air outlet end of the air supply pipe is connected to the guide channel, and the air inlet end of the air supply pipe is connected to the air supply component.

[0015] In a preferred embodiment, an anti-sticking component is also provided in the separation mechanism, and the anti-sticking component includes a rotating shaft, which is rotatably set in the separation frame, and a number of blades are fixedly provided on the rotating shaft. An elastic part is provided at the end of the blade, and a knocking part is provided at the end of the elastic part away from the blade.

[0016] The beneficial effects of the present invention are: The present invention provides a tensile detection component and an extrusion detection component, which can assist in centering and positioning the concrete specimen through the extrusion detection component and the tensile detection component, and can realize automatic tensile and extrusion detection of the concrete specimen.

[0017] The present invention provides a heating mechanism to heat the dust particles that have become larger in volume due to humidification and moisture absorption, evaporate the moisture in the dust particles, and restore the dust particles to the size before humidification, thereby solving the problem of the increase in volume of dust particles caused by humidification, eliminating the problem of volume expansion of dust particles caused by humidification, restoring the true state of the particles, ensuring the accuracy of particle concentration measurement, and avoiding the additional interference of humidity on the detection environment, thereby effectively solving the influence of air quality and humidity on concrete durability detection, and significantly improving the accuracy and reliability of the detection results.

[0018] The present invention provides a separation mechanism to separate the water vapor formed by heating and evaporation from the air, thereby reducing the influence of the water vapor on the detection result.

[0019] The present invention provides a cooling mechanism to cool the heated air and dust particles, so that the dust particles can be restored to a state close to their original state after cooling for detection, thereby further improving the detection accuracy.

[0020] The present invention provides a drainage component to add an additional intake airflow at the intake end of the intake pipe, thereby increasing the airflow velocity and improving the fluidity of the gas, so that it can help maintain the suspension of dust particles and prevent the dust particles from aggregating, becoming larger and settling due to increased humidity. In this way, the dust particles can be extracted and detected before they settle, thereby improving their detection accuracy.

[0021] The present invention forms a high-flow air curtain at the air inlet end of the air inlet pipe by setting a separation mechanism, thereby solving the problem that adding additional air intake flow will cause additional dust particles to be sucked in, causing interference with the detection results and affecting the detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0023] Figure 2 It is a schematic diagram of the three-dimensional structure of the clamping assembly of the present invention.

[0024] Figure 3 Exploded view of the clamping assembly of the present invention.

[0025] Figure 4 It is a schematic diagram of the three-dimensional structure of the tensile detection component of the present invention.

[0026] Figure 5 It is a schematic diagram of the three-dimensional structure of the detection shell of the present invention.

[0027] Figure 6 This is a schematic diagram of the cross-sectional structure of the detection shell of the present invention Figure 1 .

[0028] Figure 7 This is a schematic diagram of the cross-sectional structure of the detection shell of the present invention Figure 2 .

[0029] Figure 8 It is a structural schematic diagram of the separation mechanism of the present invention.

[0030] Figure 9 for Figure 8 Enlarged view of part A.

[0031] Figure 10This is a schematic diagram of the cross-sectional structure of the detection shell of the present invention Figure 3 .

[0032] Figure 11 It is a structural schematic diagram of the cooling mechanism of the present invention.

[0033] Figure 12 This is a schematic diagram of the cross-sectional structure of the detection shell of the present invention Figure 4 .

[0034] Figure 13 It is a structural schematic diagram of the segmentation mechanism of the present invention.

[0035] Figure 14 It is a bottom view structural diagram of the air intake pipe drainage section of the present invention.

[0036] The accompanying drawings are marked as follows: 1. Detection mechanism; 11. Base; 12. Top frame; 13. Tensile detection assembly; 131. Linear drive assembly; 132. Clamping assembly; 1321. Fixed seat; 1322. Push-pull plate; 1323. Clamping seat; 14. Extrusion detection assembly; 141. Fixed support rod; 142. Clamping plate; 1421. Fixed shaft; 143. Driving member; 144. Guide rod; 1441. Guide port; 2. Detection housing; 21. Inlet pipe; 211. Heating section; 212. Separation section; 213. Cooling section; 214. Drainage section; 22. Vacuum assembly; 23. Detection assembly; 3. Heating mechanism; 31. Heating assembly; 32. Humidity sensor; 33. Control valve; 4. Separation mechanism; 41. Guide seat; 42. Separation frame; 43. Filter element; 44. Adsorption element; 45. Anti-sticking assembly; 451. Rotating shaft; 452. Blade; 453. Elastic element; 454. Knocking element; 5. Cooling mechanism; 51. Cooling channel; 52. Liquid inlet pipe; 53. Liquid outlet pipe; 6. Drainage assembly; 7. Separation mechanism; 71. Guide channel; 72. Air supply pipe. DETAILED DESCRIPTION

[0037] The present application is described in further detail below in conjunction with the accompanying drawings. It is necessary to point out that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technicians in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0038] Refer to the instruction manual Figures 1 to 4A tunnel lining concrete durability test device includes: a detection mechanism 1, the detection mechanism 1 includes a base 11, a top frame 12 is fixedly mounted on the base 11, a tensile detection assembly 13 is arranged between the base 11 and the top frame 12, the tensile detection assembly 13 includes a linear drive assembly 131 and two clamping assemblies 132, the two clamping assemblies 132 are respectively fixedly arranged on the output end of the linear drive assembly 131 and the base 11, the two clamping assemblies 132 are respectively used to clamp the two ends of the concrete specimen, the tensile detection assembly 13 clamps the two ends of the concrete specimen through the clamping assemblies 132, and stretches the concrete specimen through the linear drive assembly 131 to perform a tensile test; An extrusion detection assembly 14 is also provided on the base 11 . The extrusion detection assembly 14 includes two clamping plates 142 that can move synchronously in opposite directions. The extrusion detection assembly 14 squeezes the concrete specimen through the two clamping plates 142 to perform extrusion detection.

[0039] The clamping assembly 132 includes a fixed seat 1321 fixedly installed at the output end of the linear drive assembly 131, and a push-pull disk 1322 that can move vertically linearly is provided in the fixed seat 1321. Two clamping seats 1323 are slidingly provided in the fixed seat 1321, and the contact surfaces between the two clamping seats 1323 and the fixed seat 1321 are inclined surfaces, and the push-pull disk 1322 is in movable contact with the two clamping seats 1323.

[0040] The extrusion detection assembly 14 includes two fixed support rods 141, and two splints 142 are slidably set on the corresponding fixed support rods 141. A driving member 143 is set in the base 11, and a guide rod 144 is installed at the output end of the driving member 143. A guide opening 1441 is opened on the guide rod 144, and the guide opening 1441 is set at an angle. A fixed shaft 1421 is fixed on the splint 142, and the guide rod 144 is movably sleeved on the fixed shaft 1421 through the guide opening 1441.

[0041] It should be noted that the linear drive component 131 can be a component that drives linear motion, such as a linear motor, and the push-pull disk 1322 can be driven to move linearly by a cylinder. The driving member 143 is a cylinder. First, the clamping component 132 installed at the output end of the linear drive component 131 is driven to move upward by the linear drive component 131, and then the concrete specimen is placed on the clamping component 132 located below, and the extrusion detection component 14 is driven to drive the guide rod 144 upward through the driving member 143, and the two clamping plates 142 can be driven to move close to each other through the cooperation of the guide port 1441 and the fixed shaft 1421 to clamp the concrete specimen, and then the push-pull disk 1322 is driven to move linearly through the clamping component 132 located below. The bottom of the concrete specimen is clamped and fixed by the two clamping seats 1323, so that the concrete specimen can be centered and fixed. After the centering and positioning, the two clamping plates 142 are driven to reset and move away from the concrete specimen, and then the clamping assembly 132 located above is driven to move downward by the linear drive assembly 131, and the top of the concrete specimen is fixed by the clamping assembly 132 located above, and then the clamping assembly 132 located above is driven by the linear drive assembly 131 to provide an upward pulling force to the concrete specimen, so that the concrete specimen can be tensile tested, and the extrusion detection assembly 14 can be driven to make the two clamping plates 142 contact with both sides of the concrete specimen and apply pressure to both sides of the concrete specimen, so as to realize the extrusion detection of the concrete specimen.

[0042] In concrete testing laboratories, the durability testing of concrete specimens includes not only tensile and extrusion tests, but also permeability resistance, carbonation depth, and electrochemical tests. These tests have high requirements for the quality of the ambient air (especially particle concentration and humidity). Before conducting any concrete specimen tests, laboratory technicians first need to use air quality testing equipment to measure the particle concentration (such as PM2.5 and PM10) and relative humidity in the laboratory. Particle detection needs to ensure that the concentration of particles in the air is within an acceptable range. If the particle concentration is too high, air purification equipment needs to be turned on to reduce the concentration. Humidity testing requires recording the relative humidity value. If the humidity is lower than 40% (for example, in winter or dry climate conditions), in a low humidity environment, particles are more likely to remain suspended in the air, increasing the concentration of pollutants in the test environment. These particles may settle on the concrete surface and affect the accuracy of the test. Therefore, humidification treatment is required. However, while humidifying the environment, the increase in humidity will cause certain particles in the air (such as dust, dirt, etc.) to absorb water and expand, resulting in an increase in the volume of the particles and an increase in the concentration of the tested particles. This can easily lead to problems affecting the accuracy of concrete durability testing during durability testing.

[0043] Refer to the instruction manual Figures 5 and 6, a detection shell 2 is also provided on the top frame 12, an air inlet pipe 21 is provided at the air inlet end of the detection shell 2, an air extraction component 22 and a detection component 23 are provided in the detection shell 2, and the air extraction component 22 draws the air to be detected into the detection shell 2 through the air inlet pipe 21 by suction; The air inlet pipe 21 includes a heating section 211, in which a heating mechanism 3 is provided. The heating mechanism 3 includes a heating component 31, which is provided in the heating section 211 and is used to dry the air to be detected. The heating mechanism 3 also includes two control valves 33, which are respectively located at the air inlet and air outlet ends of the heating section 211. A plurality of humidity sensors 32 are provided in the heating section 211, and the plurality of humidity sensors 32 are arranged in a circular array on the inner wall of the heating section 211. During detection, the exhaust component 22 draws the air to be detected into the heating section 211, the two control valves 33 are closed, and the humidity sensor 32 detects the real-time humidity of the air to be detected in the heating section 211. When the humidity sensor 32 detects that the humidity value of the air to be detected in the heating section 211 is lower than the threshold value, the two control valves 33 are opened, and the air to be detected enters the detection component 23 for detection.

[0044] It should be noted that the exhaust component 22 is an exhaust fan, the detection component 23 is a dust detection sensor, and the heating component 31 can be a heating plate. An electric heating wire is provided in the heating plate. The air to be detected is drawn into the air intake pipe 21 through the exhaust component 22, and the air to be detected is heated by the heating plate to evaporate the moisture contained in the particulate matter. The threshold is a relative humidity range set in order to obtain accurate detection results when detecting dust particles in the air. Below this threshold, the moisture in the dust particles evaporates, so that the detected dust particle concentration more accurately reflects the amount of solid particles without being disturbed by the influence of moisture.

[0045] It should also be noted that the heating of the air may include two methods. When the air to be detected enters the heating section 211, the two control valves 33 are closed to allow the air to be detected to stay in the heating section 211 and be heated. At this time, the heating component 31 can be maintained at a certain temperature and the time the air to be detected stays in the heating section 211 can be controlled. After the humidity sensor 32 detects that the humidity value of the air to be detected in the heating section 211 is lower than the threshold value, it can be determined that the air to be detected has been dried at this time. In addition, the temperature of the heating component 31 can be set to be adjustable, and the time the air to be detected stays in the heating section 211 is the same. The humidity value of the air to be detected in the heating section 211 is detected by the humidity sensor 32, and the heating component 31 is controlled to gradually heat up. After a certain period of time, when the humidity sensor 32 detects that the humidity value of the air to be detected in the heating section 211 is lower than the threshold value, it can be determined that the air to be detected has been dried at this time. The moisture in the dust particles has little effect on the detection results when the above-mentioned determination that the air to be detected has been dried.

[0046] The specific implementation scenario is as follows: during the detection, the electric heating plate is first energized to increase the temperature in the heating section 211, and then the exhaust fan is driven to extract external air. When the external air enters the heating section 211 of the air inlet pipe 21, the two control valves 33 are closed to allow the air entering the heating section 211 to remain in the heating section 211, and the air is heated by the heating component 31 to evaporate the moisture in the dust. At the same time, the real-time humidity of the air in the heating section 211 is detected in real time by multiple humidity sensors 32. When the humidity sensor 32 detects that the air humidity value in the heating section 211 is lower than the threshold value, the two control valves 33 are opened. A control valve 33 is opened, and the exhaust fan continues to draw air, and draws the air into the dust detection sensor to detect the particle concentration. By heating the dust particles whose volume has increased due to humidification and moisture absorption, the moisture in the dust particles is evaporated, and the dust particles are restored to the size before humidification, thereby eliminating the problem of dust particle volume expansion caused by humidification, restoring the true state of the particles, ensuring the accuracy of particle concentration measurement, and avoiding additional interference of humidity on the detection environment, thereby effectively solving the impact of air quality and humidity on concrete durability detection, and significantly improving the accuracy and reliability of the detection results.

[0047] It should also be noted that the present invention can also be provided with a purification device for promptly purifying the room when a high concentration of particulate matter is detected in the laboratory. The purification device includes an air purifier and a controller. The controller is a PLC. When the dust detection sensor detects a high concentration of particulate matter in the indoor air, the signal is transmitted to the controller, and the air purifier is controlled by the controller to purify the indoor air in a timely manner to ensure the air quality during the concrete durability test and to improve the durability test accuracy.

[0048] However, in the above technical solution, the dust particles whose volume increases after humidification and water absorption are heated to evaporate the water in the dust particles. The dust particles are restored to the size before humidification after heating and evaporation, thereby solving the problem that the volume of dust particles increases due to humidification and affects the detection results. However, the water in the dust particles will be evaporated by heating and evaporation, resulting in the formation of water vapor after evaporation. The water vapor may condense and produce dirt on the optical or electrical components of the detection equipment, thereby causing the performance of the instrument to decline and the error of the measurement result to increase. For this reason, the present invention also proposes a separation mechanism 4 for separating the water vapor formed by heating and evaporation from the air.

[0049] For details, please refer to the attached manual. Figure 7 and Figure 8 The air intake pipe 21 also includes a separation section 212, in which a separation mechanism 4 is provided. The separation mechanism 4 is used to separate the water vapor formed after heating. The separation mechanism 4 includes a guide seat 41, which is fixedly arranged in the separation section 212. A separation frame 42 is provided on the guide seat 41, and a filter element 43 and an adsorption element 44 are provided on the separation frame 42. The filter element 43 is used to filter particulate matter in the air, and the adsorption element 44 is used to adsorb water vapor in the air.

[0050] It should be noted that the filter element 43 is a microporous membrane material that only allows gas molecules the size of water molecules to pass through and blocks larger dust particles. It has a high degree of selective permeability, and the filter element 43 is tilted. The adsorbent 44 is activated carbon. When the heated air enters the separation section 212, the filter element 43 first filters out the dust particles in the air, and then Figure 8 As shown, under the action of suction, the dust particles move along the surface of the inclined filter element 43, and the air that has filtered out the dust particles passes through the activated carbon, causing the activated carbon to adsorb water vapor in the air, thereby achieving the effect of separating the water vapor in the air. Finally, the air can carry the dust particles together with the detection component 23 for detection.

[0051] Further, refer to the instructions attached Figure 9 An anti-sticking component 45 is also provided in the separation mechanism 4. The anti-sticking component 45 includes a rotating shaft 451. The rotating shaft 451 is rotatably set in the separation frame 42. A plurality of blades 452 are fixedly provided on the rotating shaft 451. An elastic member 453 is provided at the end of the blade 452. A knocking member 454 is provided at the end of the elastic member 453 away from the blade 452.

[0052] It should be noted that the elastic part 453 is a spring and the knocking part 454 is a ball made of rubber. When the air is pumped out, the airflow impacts the blades 452, so that several blades 452 can drive the rotating shaft 451 to rotate, and while the rotating shaft 451 rotates, it drives the knocking part 454 to knock on the filter element 43, so that the filter element 43 can shake, thereby preventing dust particles from adhering to the filter element 43, resulting in a reduction in dust particles in the detected air, affecting the detection results.

[0053] In the above technical solution, dust particles with moisture in the air are heated and the water vapor formed by evaporation is separated. However, after the heated dust particles evaporate the moisture, the physical state of the dust particles will change due to the loss of moisture, and the heated air will reduce the density of the air, resulting in unstable airflow and inaccurate detection results. For this reason, the present invention also proposes a cooling mechanism 5 for cooling the air and dust particles after separating the water vapor, so that the dust particles can be quickly cooled, so that the dust particles can be restored to a state as close to the original state as possible.

[0054] For details, please refer to the attached manual. Figure 10 and Figure 11 The air inlet pipe 21 also includes a cooling section 213, and a cooling mechanism 5 is provided in the cooling section 213. The cooling mechanism 5 is used to cool the air after the water vapor is separated. The cooling mechanism 5 includes a cooling channel 51. The cooling channel 51 is opened in the cooling section 213. The cooling section 213 is also provided with a liquid inlet pipe 52 and a liquid outlet pipe 53. The liquid inlet pipe 52 is connected to the liquid inlet end of the cooling channel 51, and the liquid inlet end of the liquid inlet pipe 52 is connected to a liquid delivery component. The liquid outlet pipe 53 is connected to the liquid outlet end of the cooling channel 51.

[0055] It should be noted that the liquid delivery component is a water pump, which draws coolant through the water pump and delivers it to the cooling channel 51 through the liquid inlet pipe 52, so that the coolant can flow in the cooling channel 51. When the air flows in the cooling section 213, the air and dust particles are quickly cooled by heat exchange, so that the dust particles can be restored to a state as close to their original state as possible, further improving its detection accuracy.

[0056] However, in the above technical solution, after the air is humidified, the dust particles are restored to a state close to their original state for detection by heating, separation and cooling. During the humidification process, the fine dust particles form larger particles after absorbing water. Not only will the increase in the volume of the dust particles affect the detection results, but the weight of the dust particles will also increase, resulting in an increase in the settling rate of the dust particles, thereby reducing the concentration of dust particles in the air. In this way, the illusion of a decrease in actual concentration will appear during detection. For this reason, the present invention also proposes a drainage component 6, which is used to add an additional intake airflow when extracting external air, so that its additional intake airflow can increase the airflow velocity and improve the fluidity of the gas.

[0057] For details, please refer to the attached manual. Figure 12 The air intake pipe 21 further includes a drainage section 214 , in which a drainage component 6 is provided. The drainage component 6 is used to provide additional intake air flow to the air intake pipe 21 .

[0058] It should be noted that the drainage component 6 is a fan. By arranging a fan at the air inlet end of the air inlet pipe 21, an additional air intake flow is added when drawing external air, so that the additional air intake flow can increase the air flow speed and improve the fluidity of the gas. The faster air flow can help keep the dust particles suspended and prevent the dust particles from aggregating and becoming larger and settling due to increased humidity. Therefore, the dust particles can be extracted and detected before they settle, thereby improving their detection accuracy.

[0059] It should also be noted that the drainage component 6, the guide seat 41, the separation frame 42 and the air intake pipe 21 are all made of smooth and inert materials, such as stainless steel or organic glass, to reduce the adhesion of dust particles on the surface, which can further improve its detection accuracy.

[0060] In the above technical solution, an additional intake air flow is added to increase the air flow velocity and improve the fluidity of the gas. However, when the gas flow velocity increases, additional dust particles will be inhaled, which will interfere with the detection results and cause an erroneous estimation of the dust concentration. For this reason, the present invention proposes a separation mechanism 7, which is used to form an air curtain at the air intake end of the intake pipe 21 during air extraction to block the entry of additional air and dust particles near the air intake end.

[0061] For details, please refer to the attached manual. Figure 13 and Figure 14A partition mechanism 7 is also provided in the drainage section 214. The partition mechanism 7 is used to form an air curtain at the air inlet end of the air inlet pipe 21. The partition mechanism 7 includes a guide channel 71. The guide channel 71 is opened at the bottom of the drainage section 214, and the air outlet end of the guide channel 71 is annular. An air supply pipe 72 is provided on the drainage section 214. The air outlet end of the air supply pipe 72 is connected to the guide channel 71, and the air inlet end of the air supply pipe 72 is connected to the air supply component.

[0062] It should be noted that the air supply component is an air pump, and the air flow rate delivered by the air pump to the guide channel 71 is higher than the flow of the external air extracted by the air extraction component 22. Figure 9 As shown, the diameter of the air outlet end of the guide channel 71 is smaller than the diameter of the air inlet end of the guide channel 71, so that the air flow can further increase the air flow velocity when it is discharged through the guide channel 71, and the high-speed air is transported into the guide channel 71 through the air pump and the air supply pipe 72, so that the air can be ejected from the air outlet end of the guide channel 71, and form an air curtain at the air inlet end of the air inlet pipe 21, blocking the entry of additional air and dust particles near the air inlet end, thereby ensuring the detection accuracy of the ambient air quality near the concrete specimen during the concrete durability test, thereby ensuring the detection accuracy of the concrete durability.

[0063] The above-described embodiments merely illustrate several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, and all such variations and improvements fall within the scope of protection of the present invention.

Claims

1. A tunnel lining concrete durability test device, characterized in that: include: A detection mechanism (1), the detection mechanism (1) comprising a base (11), a top frame (12) fixedly mounted on the base (11), a tensile detection assembly (13) disposed between the base (11) and the top frame (12), the tensile detection assembly (13) comprising a linear drive assembly (131) and two clamping assemblies (132), the two clamping assemblies (132) being fixedly disposed on an output end of the linear drive assembly (131) and the base (11), respectively, the two clamping assemblies (132) being used to clamp two ends of a concrete specimen, respectively; An extrusion detection assembly (14) is also provided on the base (11). The extrusion detection assembly (14) comprises two clamping plates (142) capable of synchronously moving in opposite directions. The extrusion detection assembly (14) performs extrusion detection by squeezing a concrete specimen through the two clamping plates (142).

2. The tunnel lining concrete durability testing device according to claim 1, characterized in that: The clamping assembly (132) comprises a fixed seat (1321) fixedly mounted on the output end of the linear drive assembly (131); a push-pull disk (1322) capable of vertical linear motion is provided in the fixed seat (1321); two clamping seats (1323) are slidably provided in the fixed seat (1321); and the contact surfaces between the two clamping seats (1323) and the fixed seat (1321) are inclined surfaces, and the push-pull disk (1322) is in movable contact with the two clamping seats (1323).

3. The tunnel lining concrete durability testing device according to claim 2, characterized in that: The extrusion detection assembly (14) includes two fixed support rods (141), two clamping plates (142) are slidably arranged on the corresponding fixed support rods (141), a driving member (143) is arranged in the base (11), and a guide rod (144) is installed at the output end of the driving member (143), a guide opening (1441) is opened on the guide rod (144), and the guide opening (1441) is inclined, a fixed shaft (1421) is fixedly arranged on the clamping plate (142), and the guide rod (144) is movably sleeved on the fixed shaft (1421) through the guide opening (1441).

4. The tunnel lining concrete durability testing device according to claim 3, characterized in that: A detection housing (2) is also provided on the (12), an air inlet pipe (21) is provided at the air inlet end of the detection housing (2), an air extraction component (22) and a detection component (23) are provided in the detection housing (2), and the air extraction component (22) draws the air to be detected into the detection housing (2) through the air inlet pipe (21) by suction; The air inlet pipe (21) includes a heating section (211), a heating mechanism (3) is provided in the heating section (211), the heating mechanism (3) includes a heating component (31), the heating component (31) is provided in the heating section (211), and the heating component (31) is used to dry the air to be detected; The heating mechanism (3) further comprises two control valves (33), the two control valves (33) being respectively located at the air inlet end and the air outlet end of the heating section (211). A plurality of humidity sensors (32) are provided in the heating section (211), and the plurality of humidity sensors (32) are arranged in a ring array on the inner wall of the heating section (211). During detection, the air extraction component (22) draws the air to be detected into the heating section (211), the two control valves (33) are closed, and the humidity sensor (32) detects the real-time humidity of the air to be detected in the heating section (211). When the humidity sensor (32) detects that the humidity value of the air to be detected in the heating section (211) is lower than a threshold value, the two control valves (33) are opened, and the air to be detected enters the detection component (23) for detection.

5. The tunnel lining concrete durability testing device according to claim 4, characterized in that: The air inlet pipe (21) further comprises a separation section (212), a separation mechanism (4) is provided in the separation section (212), the separation mechanism (4) comprises a guide seat (41), the guide seat (41) is fixedly provided in the separation section (212), a separation frame (42) is provided on the guide seat (41), a filter element (43) and an adsorption element (44) are provided on the separation frame (42), the filter element (43) is used to filter particulate matter in the air, and the adsorption element (44) is used to adsorb water vapor in the air.

6. The tunnel lining concrete durability testing device according to claim 5, characterized in that: The air inlet pipe (21) further comprises a cooling section (213), a cooling mechanism (5) is provided in the cooling section (213), the cooling mechanism (5) comprises a cooling channel (51), the cooling channel (51) is opened in the cooling section (213), a liquid inlet pipe (52) and a liquid outlet pipe (53) are further provided on the cooling section (213), the liquid inlet pipe (52) is communicated with the liquid inlet end of the cooling channel (51), and the liquid inlet end of the liquid inlet pipe (52) is communicated with a liquid delivery component, and the liquid outlet pipe (53) is communicated with the liquid outlet end of the cooling channel (51).

7. The tunnel lining concrete durability testing device according to claim 6, characterized in that: The air intake pipe (21) further comprises a drainage section (214), wherein a drainage component (6) is provided in the drainage section (214), and the drainage component (6) is used to provide additional intake air flow to the air intake pipe (21).

8. The tunnel lining concrete durability testing device according to claim 7, characterized in that: A separation mechanism (7) is also provided in the drainage section (214), and the separation mechanism (7) is used to form an air curtain at the air inlet end of the air inlet pipe (21).

9. The tunnel lining concrete durability testing device according to claim 8, characterized in that: The partition mechanism (7) comprises a guide channel (71), the guide channel (71) being opened at the bottom of the guide section (214), and the air outlet end of the guide channel (71) being arranged in an annular shape, an air supply pipe (72) being arranged on the guide section (214), the air outlet end of the air supply pipe (72) being connected to the guide channel (71), and the air inlet end of the air supply pipe (72) being connected to an air supply component.

10. The tunnel lining concrete durability testing device according to claim 9, characterized in that: An anti-sticking component (45) is further provided in the separation mechanism (4). The anti-sticking component (45) comprises a rotating shaft (451). The rotating shaft (451) is rotatably provided in the separation frame (42). A plurality of blades (452) are fixedly provided on the rotating shaft (451). An elastic member (453) is provided at the end of each blade (452). A knocking member (454) is provided at one end of the elastic member (453) away from the blade (452).

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