Anti-cracking performance detection device for non-expansive fireproof coating

Abstract

The invention belongs to the technical field of fireproof coating performance detection, and particularly relates to an anti-cracking performance detection device for a non-expansive fireproof coating, the anti-cracking performance detection device comprises an ultrasonic flaw detector main body, an ultrasonic probe and a hollow supporting table, and the lower surface of the hollow supporting table is fixedly connected with two supporting frames. The device for detecting the anti-cracking performance of the non-expansive fireproof coating has a high-temperature and low-temperature environment simulation function, so that the detection of the anti-cracking performance of the coating is more in line with an actual use environment, and the adsorption strength of the coating can be detected in the high-temperature and low-temperature environments, so that the anti-cracking performance of the coating is judged; and the device also has a function of detecting the multi-position impact anti-cracking performance of the coating, so that the richness of the anti-cracking performance detection of the coating is further improved, the accuracy of the anti-cracking performance detection of the coating can be improved, the use reliability of the device can be improved, and the qualified rate of the production of the non-expansive fireproof coating can be ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of fire retardant coating performance detection, and in particular relates to an anti-cracking performance detection device for non-expansion fire retardant coating. Background Art

[0002] Non-expanding fire retardant coatings are coatings that rely on their own flame retardancy or non-combustibility to not expand under the action of flames or high temperatures, and rely on their low thermal conductivity and other properties to delay the spread of fire and protect the substrate. Currently, newly developed non-expanding fire retardant coatings need to be tested for performance, especially the testing of anti-cracking performance is very necessary. Firstly, good anti-cracking performance can ensure that the coating remains intact in various environments to avoid reducing the fireproof effect due to cracks. Secondly, anti-cracking performance testing can evaluate the quality of the coating and provide protection for engineering applications, ensuring that when a fire occurs, the non-expanding fire retardant coating can effectively play a fireproof role and protect the lives and property of people. For example, the patent authorization announcement number is CN117388057B, which discloses an anti-cracking performance testing device for non-expanding fire retardant coatings.

[0003] At present, during the use of non-expanding fire retardant coating anti-cracking performance testing devices, tapping is mostly used to verify the anti-cracking performance of non-expanding fire retardant coatings. However, this static tapping detection method has great limitations, and its ability to simulate the actual use environment of non-expanding fire retardant coatings is obviously insufficient. Specifically, the detection process often ignores the fact that non-expanding fire retardant coatings will be affected by ambient temperature factors in actual use. Under high and low temperature environments, the non-expanding fire retardant coating will be affected by thermal expansion and contraction, which will affect its adsorption strength with the building surface. Once the adsorption strength weakens, it will easily cause the non-expanding fire retardant coating to wrinkle, and then cause the non-expanding fire retardant coating to crack and damage, which will ultimately have an adverse effect on the accuracy of the non-expanding fire retardant coating anti-cracking performance test results. This will not only reduce the reliability of the use of the non-expanding fire retardant coating anti-cracking performance testing device, but also affect the qualified rate of non-expanding fire retardant coating production.

[0004] To this end, we propose an anti-cracking performance detection device for non-expanding fire retardant coatings to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a device for detecting the anti-cracking performance of non-expanding fire retardant coatings in order to solve the above-mentioned problems.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a crack-proof performance detection device for non-expanding fire-retardant coating, comprising an ultrasonic flaw detector body, an ultrasonic probe and a hollow support platform, the lower surface of the hollow support platform is fixedly connected to two support frames, the outer walls on both sides of the hollow support platform are slidably connected to a U-shaped clamping plate, the lower surface of the U-shaped clamping plate is provided with two rectangular through holes matched with the support frames, one of the side walls of the support frame is fixedly connected to a fixing frame, the inside of the fixing frame is fixedly connected to a push switch, a first electric push rod is fixedly embedded at the bottom end of the hollow support platform, and the moving end of the first electric push rod is fixedly connected to the inner wall of the U-shaped clamping plate; The upper surface of the U-shaped clamping plate is fixedly connected to a U-shaped top plate, the bottom end of the ultrasonic flaw detector body is fixedly connected to the upper surface of the U-shaped top plate, a second electric push rod is fixedly embedded in the top of the U-shaped top plate, and a coating layer adsorption strength detection mechanism is fixedly connected to the bottom end of the second electric push rod; The outer wall of the U-shaped top plate is fixedly connected to a PLC controller and an alarm, and the interior of the U-shaped top plate is fixedly connected to an air supply component; A hollow ring is fixedly connected to the inner wall of the bottom end of the hollow support platform, the first electric push rod is located at the center of the hollow ring, and a hot and cold environment control mechanism is fixedly connected to the inner wall of the hollow ring.

[0007] In the above-mentioned anti-cracking performance detection device for non-expanding fire-retardant coating, the coating layer adsorption strength detection mechanism includes a fixed rod fixedly connected to the movable end of the second electric push rod, the bottom end of the fixed rod is connected to an obtuse-angle bent plate through a rolling bearing, the top end of the ultrasonic probe is fixedly embedded and connected to the obtuse-angle bent plate, the data wire of the ultrasonic probe is electrically connected to the input end of the ultrasonic flaw detector body, the output end of the ultrasonic flaw detector body is electrically connected to the input end of the PLC controller through a wire, the horizontal part outer wall of the obtuse-angle bent plate is fixedly sleeved with a deflection assembly and a connecting pipe, the bottom end outer wall of the connecting pipe is fixedly sleeved with a sealing cover, the bottom end of the sealing cover is fixedly sleeved with a sealing rubber ring, the bottom end inner wall of the connecting pipe is fixedly connected with an exhaust check valve, the inner side of the sealing cover is fixedly connected with an air pressure sensor, and the inclined outer wall of the obtuse-angle bent plate is connected with a knocking test mechanism.

[0008] In the above-mentioned anti-cracking performance detection device for non-expanding fire retardant coating, the deflection assembly includes a servo motor fixedly connected to the horizontal part of the obtuse-angle bent plate, the output end of the servo motor passes through the upper surface of the horizontal part of the obtuse-angle bent plate and is fixedly connected to a gear, and the rod wall of the fixed rod is fixedly sleeved with an external gear ring meshing with the gear.

[0009] In the above-mentioned anti-cracking performance detection device for non-expanding fire-retardant coating, the knocking test mechanism includes an electromagnetic push rod fixedly sleeved with the inclined part of the obtuse bent plate, the outer wall of the inclined part of the obtuse bent plate is provided with an inclined square hole, and the hole wall of the inclined square hole is movably connected with an L-shaped knocking square rod, the top horizontal part of the L-shaped knocking square rod is located on the extension line of the center of the moving end of the electromagnetic push rod, the bottom end of the L-shaped knocking square rod passes through the inner wall of the sealing cover, the outer wall of the sealing cover is provided with a rectangular hole matching the outer wall of the L-shaped knocking square rod, the rod wall of the L-shaped knocking square rod is fixedly sleeved with a reset spring, the top end of the reset spring is fixedly connected to the inner wall of the obtuse bent plate, the rod wall of the L-shaped knocking square rod is fixedly sleeved with a sealing telescopic cover, and the outer wall of the sealing telescopic cover is fixedly connected to the inner wall of the sealing cover.

[0010] In the above-mentioned anti-cracking performance detection device for non-expanding fire-retardant coating, the air supply component includes an air pump fixedly connected to the inner wall of the U-shaped top plate, the air inlet end of the air pump is fixedly connected to a first hose, the air inlet end of the first hose is fixedly connected to a three-way reversing solenoid valve, the bottom air inlet end of the three-way reversing solenoid valve is fixedly connected to the top of the connecting pipe, the air outlet end of the air pump is fixedly connected to a second hose, the air outlet end of the second hose passes through the inner wall of the hollow support platform and is fixedly connected to the side wall of the hollow ring, and the upper surface of the U-shaped top plate is provided with a through hole that matches the first hose.

[0011] In the above-mentioned anti-cracking performance detection device for non-expanding fire-retardant coating, the hot and cold environment control mechanism includes a plurality of electric heating tubes fixedly embedded in the side wall of the hollow ring, and the tube walls of the plurality of electric heating tubes are commonly fixedly sleeved with a plurality of first metal mesh plates, and the plurality of first metal mesh plates are all located on the outside of the air outlet end of the second hose, and a fixed through hole is opened on the upper surface of the hollow ring, and the hole wall of the fixed through hole is fixedly connected with a semiconductor refrigeration plate, and the cooling side of the semiconductor refrigeration plate is fixedly connected with a plurality of second metal mesh plates, and the bottom end of the hollow ring is fixedly connected with a Y-shaped tube. An air guide cavity is provided inside the vertical part of the U-shaped splint, and multiple assembly holes are provided on the outer walls at the top ends of both sides of the U-shaped splint, and a one-way air nozzle is fixedly connected to the hole wall of the assembly hole, and the air inlet end of the one-way air nozzle is connected to the air guide cavity, and the two air outlet ends of the Y-shaped tube are respectively connected to the air guide cavities at the two vertical parts of the U-shaped splint, and a temperature sensor is fixedly embedded in the outer wall of the vertical part of the U-shaped splint, and the detection end of the temperature sensor extends into the interior of the air guide cavity, and the upper surface of the hollow ring is fixedly connected to a cooling auxiliary mechanism for heat dissipation at the heat dissipation end of the semiconductor refrigeration plate.

[0012] In the above-mentioned anti-cracking performance detection device for non-expanding fire-retardant coating, the cooling auxiliary mechanism includes a connecting cover fixedly connected to the upper surface of the hollow ring, the tube wall of the second hose is fixedly connected to a normally closed solenoid valve, the air outlet end of the normally closed solenoid valve is fixedly connected to a third hose, the bottom end of the hollow support platform is fixedly connected to an L-shaped metal pipe, the air inlet end of the L-shaped metal pipe passes through the connecting cover and is fixedly connected to the air outlet end of the third hose, the tube wall of the L-shaped metal pipe located inside the connecting cover is fixedly sleeved with metal fins, and the bottom end of the connecting cover is filled with a cooling liquid layer.

[0013] In the above-mentioned anti-cracking performance detection device for non-expanding fire-retardant coating, the outer walls on both sides of the U-shaped clamp are movably connected with limit covers, the top outer wall of the limit cover is fixedly connected to the outer wall of the hollow support platform, and the top side wall of the limit cover is provided with an installation groove that matches the vertical part of the U-shaped clamp.

[0014] Compared with the existing technology, the advantages of a non-expansion fire retardant coating anti-cracking performance detection device are: 1. By setting up the hot and cold environment control mechanism and the cooling auxiliary mechanism, when the non-expanding fire retardant coating anti-cracking performance detection device detects the anti-cracking performance of the non-expanding fire retardant coating, the hot and cold environment control mechanism can be controlled to work through the PLC controller, the hot and cold environment control mechanism can generate low-temperature air and high-temperature air, and the cooling auxiliary mechanism can ensure that the hot and cold environment control mechanism generates reliable low-temperature air, the low-temperature air and the high-temperature air can be transported to the non-expanding fire retardant coating, and the anti-cracking performance of the non-expanding fire retardant coating can be detected under high and low temperature environments. This mechanism enables the non-expanding fire retardant coating anti-cracking performance detection device to have high and low temperature environment simulation functions, so that the non-expanding fire retardant coating anti-cracking performance detection is more in line with the actual use environment, and can improve the accuracy of the non-expanding fire retardant coating anti-cracking performance detection.

[0015] 2. By setting up the coating layer adsorption strength detection mechanism and the air supply component, in cooperation with the air supply component, the coating layer adsorption strength detection mechanism can seal the air inside the cover, so that the non-expanding fire retardant coating is in a low-pressure environment, and detect the adsorption strength of the non-expanding fire retardant coating through the low-pressure environment, and cooperate with the cold and hot environment control mechanism to make the adsorption strength of the non-expanding fire retardant coating be detected in low-temperature and high-temperature environments, and further detect the anti-cracking performance of the non-expanding fire retardant coating in high-temperature and low-temperature environments. At the same time, the anti-cracking performance of the non-expanding fire retardant coating is tested through the ultrasonic flaw detector body and the ultrasonic probe. This mechanism can detect the adsorption strength of the non-expanding fire retardant coating in high-temperature and low-temperature environments, and at the same time detect the anti-cracking performance of the non-expanding fire retardant coating through the adsorption strength, which can not only improve the accuracy of the anti-cracking performance detection of the non-expanding fire retardant coating, but also improve the reliability of the use of the anti-cracking performance detection device of the non-expanding fire retardant coating, and can ensure the qualified rate of the production of non-expanding fire retardant coating.

[0016] 3. Through the knock test mechanism and deflection assembly, when the non-expansion fire retardant coating on the surface of the steel plate specimen has qualified anti-cracking performance under high and low temperature environments, the PLC controller controls the hot and cold environment control mechanism to work, and the hot and cold environment control mechanism can simulate from high temperature environment to low temperature environment, and the high temperature environment and low temperature environment are simulated for minutes respectively. At the same time, the PLC controller controls the second electric push rod to push the sealing cover downward, so that the sealing rubber ring at the bottom of the sealing cover is in sealing contact with the non-expansion fire retardant coating of the steel plate specimen, and in the temperature change, the PLC controller controls the knock test mechanism to work, and the hot and cold environment control mechanism performs high temperature and low temperature environment cycle conversion, and the PLC controls The device then controls the obtuse-angle bent plate to rotate ninety degrees through the deflection assembly, and the obtuse-angle bent plate rotates three times in total. During this process, if the PLC controller controls the alarm not to sound, the impact resistance of the non-expanding fire retardant coating is qualified, and then the anti-cracking performance of the non-expanding fire retardant coating is qualified. Otherwise, the alarm sounds, indicating that the anti-cracking performance of the non-expanding fire retardant coating is unqualified. This mechanism enables the non-expanding fire retardant coating anti-cracking performance detection device to have the function of detecting the impact anti-cracking performance of the non-expanding fire retardant coating under high and low temperature environments, and the device also has the ability of multi-position detection, which further improves the richness of the non-expanding fire retardant coating anti-cracking performance detection and can improve the accuracy of the non-expanding fire retardant coating anti-cracking performance detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a crack prevention performance detection device for a non-expansion fire retardant coating provided by the present invention; Figure 2 It is a schematic structural diagram of a cross-section of a crack prevention performance detection device for a non-expanding fire retardant coating provided by the present invention; Figure 3 It is a partially enlarged structural schematic diagram of a crack prevention performance detection device for a non-expanding fire retardant coating provided by the present invention; Figure 4 It is a structural schematic diagram of a U-shaped clamping plate part in a crack prevention performance detection device for a non-expansion fire retardant coating provided by the present invention; Figure 5 It is a structural schematic diagram of a fixed rod part in a crack prevention performance detection device for a non-expanding fire retardant coating provided by the present invention; Figure 6 It is a structural schematic diagram of part A of a crack prevention performance detection device for non-expansion fire retardant coating provided by the present invention; Figure 7 It is a structural schematic diagram of the electric heating tube part of the cold and hot environment control mechanism in the anti-cracking performance detection device for non-expansion fire retardant coating provided by the present invention; Figure 8 The present invention provides a schematic structural diagram of a semiconductor refrigeration plate portion of a cold and hot environment control mechanism in a crack prevention performance detection device for a non-expanding fire retardant coating.

[0018] In the figure: 1 ultrasonic flaw detector body, 2 ultrasonic probe, 3 hollow support platform, 4 support frame, 5 deflection assembly, 51 servo motor, 52 gear, 53 outer gear ring, 6 coating layer adsorption strength detection mechanism, 61 fixed rod, 62 obtuse bent plate, 63 connecting pipe, 64 sealing cover, 65 sealing rubber ring, 66 exhaust check valve, 67 air pressure sensor, 7 air supply assembly, 71 air pump, 72 first hose, 73 three-way reversing solenoid valve, 74 second hose, 75 through hole, 8 hot and cold environment control mechanism, 81 electric heating pipe, 82 first metal mesh plate, 83 semiconductor cooling plate, 84 second metal mesh plate , 85 Y-shaped tube, 86 air guide cavity, 87 one-way air nozzle, 88 temperature sensor, 89 cooling auxiliary mechanism, 891 connecting cover, 892 normally closed solenoid valve, 893 third hose, 894 L-shaped metal tube, 895 metal fin, 896 cooling liquid layer, 9 knocking test mechanism, 91 electromagnetic push rod, 92 L-shaped knocking square rod, 93 return spring, 94 sealing telescopic cover, 10 rectangular through hole, 11 fixing frame, 12 push switch, 13 first electric push rod, 14 U-shaped top plate, 15 second electric push rod, 16 PLC controller, 17 alarm, 18 hollow ring, 19 U-shaped splint, 20 limit cover. Implementation

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] like Figure 1-Figure 8As shown, a crack prevention performance detection device for non-expansion fire retardant coating comprises an ultrasonic flaw detector body 1, an ultrasonic probe 2 and a hollow support platform 3. The lower surface of the hollow support platform 3 is fixedly connected to two support frames 4. The outer walls on both sides of the hollow support platform 3 are slidably connected with a U-shaped clamping plate 19. The outer walls on both sides of the U-shaped clamping plate 19 are movably sleeved with a limiting cover 20. The top outer wall of the limiting cover 20 is fixedly connected to the outer wall of the hollow support platform 3. The top side wall of the limiting cover 20 is provided with an installation groove matched with the vertical part of the U-shaped clamping plate 19. The limiting cover 20 can ensure the stability of the lifting and lowering of the U-shaped clamping plate 19. The lower surface of the U-shaped clamping plate 19 is provided with two rectangular through holes 10 which match with the support frame 4, wherein a fixing frame 11 is fixedly connected to the side wall of one of the support frames 4, a push switch 12 is fixedly connected to the interior of the fixing frame 11, a first electric push rod 13 is fixedly embedded in the bottom end of the hollow support platform 3, a moving end of the first electric push rod 13 is fixedly connected to the inner wall of the U-shaped clamping plate 19, a U-shaped top plate 14 is fixedly connected to the upper surface of the U-shaped clamping plate 19, the bottom end of the ultrasonic flaw detector body 1 is fixedly connected to the upper surface of the U-shaped top plate 14, and a second electric push rod 15 is fixedly embedded in the top of the U-shaped top plate 14.

[0021] The bottom end of the second electric push rod 15 is fixedly connected with a coating layer adsorption strength detection mechanism 6, which includes a fixed rod 61 fixedly connected to the moving end of the second electric push rod 15, and the bottom end of the fixed rod 61 is connected with an obtuse-angled bent plate 62 through a rolling bearing. The top of the ultrasonic probe 2 is fixedly embedded and connected with the obtuse-angled bent plate 62, and the data wire of the ultrasonic probe 2 is electrically connected to the input end of the ultrasonic flaw detector body 1, and the output end of the ultrasonic flaw detector body 1 is electrically connected to the input end of the PLC controller 16 through a wire. The outer wall of the horizontal part of the obtuse-angled bent plate 62 is fixedly sleeved with a connecting pipe 63, and the outer wall of the bottom end of the connecting pipe 63 is fixedly sleeved with a sealing cover 64, and the bottom end of the sealing cover 64 is fixedly sleeved with a sealing rubber ring 65, and the inner wall of the bottom end of the connecting pipe 63 is fixedly connected with an exhaust check valve 66, and the inner side of the sealing cover 64 is fixedly connected with an air pressure sensor 67, and the outer wall of the inclined part of the obtuse-angled bent plate 62 is connected with a knock test Mechanism 9, the knocking test mechanism 9 includes an electromagnetic push rod 91 fixedly sleeved with the inclined part of the obtuse bent plate 62, the outer wall of the inclined part of the obtuse bent plate 62 is provided with an inclined square hole, and the hole wall of the inclined square hole is movably connected with an L-shaped knocking square rod 92, the top horizontal part of the L-shaped knocking square rod 92 is located on the extension line of the center of the moving end of the electromagnetic push rod 91, the bottom end of the L-shaped knocking square rod 92 passes through the inner wall of the sealing cover 64, the outer wall of the sealing cover 64 is provided with a rectangular hole matching the outer wall of the L-shaped knocking square rod 92, the rod wall of the L-shaped knocking square rod 92 is fixedly sleeved with a reset spring 93, the top end of the reset spring 93 is fixedly connected to the inner wall of the obtuse bent plate 62, the rod wall of the L-shaped knocking square rod 92 is fixedly sleeved with a sealing telescopic cover 94, the outer wall of the sealing telescopic cover 94 is fixedly connected to the inner wall of the sealing cover 64, the mechanism can detect the adsorption strength of the non-expanding fire retardant coating and the surface of the building, and improve the richness and accuracy of the detection of the anti-cracking performance of the non-expanding fire retardant coating.

[0022] The outer wall of the horizontal part of the obtuse-angled bend plate 62 is fixedly sleeved with a deflection assembly 5, and the deflection assembly 5 includes a servo motor 51 fixedly connected to the horizontal part of the obtuse-angled bend plate 62. The output end of the servo motor 51 passes through the upper surface of the horizontal part of the obtuse-angled bend plate 62 and is fixedly connected with a gear 52. The rod wall of the fixed rod 61 is fixedly sleeved with an outer gear ring 53 meshing with the gear 52. This mechanism can adjust the device to perform anti-cracking performance detection on different coating positions, thereby improving the accuracy of the device in detecting the anti-cracking performance of non-expanding fire-retardant coatings.

[0023] The outer wall of the U-shaped top plate 14 is fixedly connected with a PLC controller 16 and an alarm 17, and the interior of the U-shaped top plate 14 is fixedly connected with an air supply assembly 7, and the air supply assembly 7 includes an air pump 71 fixedly connected to the inner wall of the U-shaped top plate 14, and the air inlet end of the air pump 71 is fixedly connected to a first hose 72, and the air inlet end of the first hose 72 is fixedly connected to a three-way reversing solenoid valve 73, and the bottom air inlet end of the three-way reversing solenoid valve 73 is fixedly connected to the top of the connecting pipe 63, and the air outlet end of the air pump 71 is fixedly connected to a second hose 74, and the air outlet end of the second hose 74 passes through the inner wall of the hollow support platform 3 and is fixedly connected to the side wall of the hollow ring 18. The upper surface of the U-shaped top plate 14 is provided with a through hole 75 that matches the first hose 72.

[0024] A hollow ring 18 is fixedly connected to the inner wall of the bottom end of the hollow support platform 3, and the first electric push rod 13 is located at the center of the hollow ring 18. A hot and cold environment control mechanism 8 is fixedly connected to the inner wall of the hollow ring 18. The hot and cold environment control mechanism 8 includes a plurality of electric heating tubes 81 fixedly embedded in the side wall of the hollow ring 18, and a plurality of first metal mesh plates 82 are fixedly sleeved on the tube walls of the plurality of electric heating tubes 81. The plurality of first metal mesh plates 82 are all located on the outside of the air outlet end of the second hose 74. A fixed through hole is provided on the upper surface of the hollow ring 18, and a semiconductor refrigeration plate 83 is fixedly connected to the hole wall of the fixed through hole, and a plurality of second metal mesh plates 84 are fixedly connected to the refrigeration side of the semiconductor refrigeration plate 83. The bottom end of the hollow ring 18 is fixedly connected to a Y-shaped tube 85, and the interior of the vertical portion of the U-shaped clamping plate 19 is provided with The air guide cavity 86 and the outer walls at the top ends of both sides of the U-shaped clamp plate 19 are provided with a plurality of assembly holes, and the hole walls of the assembly holes are fixedly connected with a one-way air nozzle 87, the air inlet end of the one-way air nozzle 87 is connected with the air guide cavity 86, and the two air outlet ends of the Y-shaped tube 85 are respectively connected with the air guide cavity 86 at the two vertical parts of the U-shaped clamp plate 19, and a temperature sensor 88 is fixedly embedded in the outer wall of the vertical part of the U-shaped clamp plate 19, and the detection end of the temperature sensor 88 extends into the interior of the air guide cavity 86. This mechanism enables the non-expanding fire retardant coating anti-cracking performance detection device to have the function of simulating high and low temperature environments, so that the coating anti-cracking performance detection is more in line with the actual use environment, can improve the accuracy of the coating anti-cracking performance detection, can also improve the reliability of the device, and can ensure the qualified rate of the non-expanding fire retardant coating production.

[0025] The upper surface of the hollow ring 18 is fixedly connected with a cooling auxiliary mechanism 89 for dissipating heat at the heat dissipation end of the semiconductor refrigeration plate 83. The cooling auxiliary mechanism 89 includes a connecting cover 891 fixedly connected to the upper surface of the hollow ring 18, the tube wall of the second hose 74 is fixedly connected with a normally closed solenoid valve 892, the air outlet end of the normally closed solenoid valve 892 is fixedly connected with a third hose 893, the bottom end of the hollow support platform 3 is fixedly connected with an L-shaped metal tube 894, the air inlet end of the L-shaped metal tube 894 passes through the connecting cover 891, and is fixedly connected with the air outlet end of the third hose 893, the tube wall of the L-shaped metal tube 894 located inside the connecting cover 891 is fixedly sleeved with a metal fin 895, and the bottom end of the connecting cover 891 is filled with a coolant layer 896. This mechanism can ensure the cooling effect of the semiconductor refrigeration plate 83.

[0026] The servo motor 51, the vacuum pump 71, the three-way reversing solenoid valve 73, the electric heating tube 81, the semiconductor refrigeration plate 83, the normally closed solenoid valve 892, the electromagnetic push rod 91, the first electric push rod 13, the alarm 17 and the second electric push rod 15 are all electrically connected to the output end of the PLC controller 16 through wires, and the temperature sensor 88, the air pressure sensor 67 and the push switch 12 are all electrically connected to the input end of the PLC controller 16 through wires. The above-mentioned power-on devices and electrical connections are all existing technologies and will not be repeated here.

[0027] The operating principle of the present invention is now described as follows: when it is necessary to detect the anti-cracking performance of the non-expanding fire retardant coating, first, the non-expanding fire retardant coating is evenly applied to multiple steel plate specimens, and the non-expanding fire retardant coating coating on each steel plate specimen is detected by an anti-cracking performance detection device. At this time, the steel plate is placed on the hollow support table 3, and then the PLC controller 16 controls the first electric push rod 13 to work, and the moving end of the first electric push rod 13 pushes the U-shaped clamping plate 19 downward, and the top of the U-shaped clamping plate 19 moves down to fix the steel plate specimen. At the same time, the lower surface of the U-shaped clamping plate 19 squeezes the press switch 12, the circuit of the press switch 12 is connected, and an electrical signal is sent to the PLC controller 16, and the PLC controller 16 controls the vacuum pump 71, the three-way reversing solenoid valve 73 and the electric The heating tube 81 is powered on and works for 5 minutes. After the three-way reversing solenoid valve 73 is powered on, the suction direction is changed. The air inlet end of the horizontal part of the three-way reversing solenoid valve 73 cooperates with the air pump 71 and the first hose 72 to suck air, and the air is transported to the hollow ring 18 through the second hose 74, and the temperature is increased in the hollow ring 18 through the electric heating tube 81 and the first metal mesh plate 82. The air with increased temperature is transported to the air guide cavity 86 of the U-shaped clamping plate 19 through the Y-shaped tube 85. At this time, the temperature sensor 88 detects the temperature in the air guide cavity 86 and transmits the temperature value to the PLC controller 16 in the form of an electrical signal. When the temperature of the air in the air guide cavity 86 reaches the high-temperature air threshold preset by the PLC controller 16, the PLC controller 16 controls the heating power of the electric heating tube 81 and makes the air pass through the hollow ring 18. The temperature of the air in the ring 18 is maintained at the high temperature threshold value preset by the PLC controller 16, and then the high temperature air is sprayed onto the non-expansion fire retardant coating on the surface of the steel plate specimen through the one-way air nozzle 87, simulating the use of the non-expansion fire retardant coating in a high temperature environment. After the non-expansion fire retardant coating is heated for 5 minutes, the PLC controller 16 controls the electric heating tube 81 and the three-way reversing solenoid valve 73 to be powered off, and the three-way reversing solenoid valve 73 changes the direction of exhaust after being powered off. At the same time, the PLC controller 16 controls the second electric push rod 15 to extend, and the moving end of the second electric push rod 15 pushes the sealing cover 64 downward, so that the sealing rubber ring 65 of the sealing cover 64 is in sealing contact with the non-expansion fire retardant coating of the steel plate specimen, and at the same time, the detection surface of the ultrasonic probe 2 is in contact with the non-expansion fire retardant coating on the surface of the steel plate specimen. The ultrasonic flaw detector body 1 cooperates with the ultrasonic probe 2 to detect cracks in the non-expansion fire retardant coating, and the air pump 71 sucks the air in the sealing cover 64 through the first hose 72, the three-way reversing solenoid valve 73, the connecting pipe 63 and the exhaust check valve 66. As the air is discharged, the air pressure in the sealing cover 64 gradually decreases, and the air pressure sensor 67 can detect the air pressure in the sealing cover 64 in real time, and can send the air pressure value in the sealing cover 64 to the PLC controller 16 in the form of an electrical signal. When the sealing cover 64 is evacuated, if the non-expansion fire retardant coating is cracked, the ultrasonic wave emitted by the ultrasonic probe 2 will be reflected and refracted in the cracked non-expansion fire retardant coating, and the change of the medium at the crack will also cause the ultrasonic reflection signal time delay.Then, the ultrasonic flaw detector body 1 determines that the non-expansion fire retardant coating is cracked according to these abnormal conditions, and sends an electrical signal indicating the cracking of the non-expansion fire retardant coating to the PLC controller 16. The PLC controller 16 controls the alarm 17 to sound an alarm according to the electrical signal. When the air pressure value detected by the air pressure sensor 67 reaches the detection air pressure threshold preset by the PLC controller 16, if the alarm 17 does not sound an alarm, it means that the non-expansion fire retardant coating has a qualified adsorption strength with the surface of the steel plate specimen under a high temperature environment, so that the non-expansion fire retardant coating is not easy to expand, swell and crack under a high temperature environment. At the same time, the PLC controller 16 controls the second electric push rod 15 to contract, and the vacuum pump 71 stops pumping air, and the second electric push rod 15 drives the sealing cover 64 to rise to the initial position; After the non-expanding fire-retardant coating has passed the adsorption strength test under high temperature environment, the PLC controller 16 controls the vacuum pump 71, the three-way reversing solenoid valve 73, the semiconductor refrigeration plate 83 and the normally closed solenoid valve 892 to energize and work for 5 minutes. At this time, the vacuum pump 71 draws air to the second hose 74, and a part of the air in the second hose 74 enters the hollow ring 18. The air is cooled by the semiconductor refrigeration plate 83 and the second metal mesh plate 84. At the same time, another part of the air in the second hose 74 enters the L-shaped metal tube 894 through the opened normally closed solenoid valve 892 and the third hose 893. The L-shaped metal tube 894 cooperates with the metal fin 895 to accelerate the cooling of the cooling liquid layer 896. The cooling of the cooling liquid layer 896 can better The cooling plate 83 dissipates heat on the heat dissipation side, and the cooling effect on the cooling side is improved by accelerating the heat dissipation of the semiconductor cooling plate 83 on the heat dissipation side, thereby ensuring the effect of the semiconductor cooling plate 83 on cooling the air inside the hollow ring 18. Finally, the low-temperature air is transported to the air guide cavity 86 of the U-shaped clamping plate 19 through the Y-shaped tube 85. Then the temperature sensor 88 detects the temperature of the air in the air guide cavity 86 and transmits the temperature value to the PLC controller 16 in the form of an electrical signal. When the temperature of the air in the air guide cavity 86 reaches the low-temperature air threshold value preset by the PLC controller 16, the PLC controller 16 controls the air pump 71 to maintain the air supply at this time to avoid too much or too little air passing through the L-shaped metal tube 894 to interfere with the heat dissipation speed of the heat dissipation side of the semiconductor cooling plate 83, so that the air passing through the air The temperature of the air in the core ring 18 is maintained at the low temperature threshold value preset by the PLC controller 16, and then the low temperature air is sprayed onto the non-expansion fire retardant coating of the steel plate specimen through the one-way air nozzle 87, simulating the non-expansion fire retardant coating being in a low temperature environment, and then the adsorption strength of the non-expansion fire retardant coating in the low temperature environment is detected by the coating layer adsorption strength detection mechanism 6, the ultrasonic flaw detector body 1 and the ultrasonic probe 2. When the air pressure value detected by the air pressure sensor 67 reaches the detection air pressure threshold value preset by the PLC controller 16, the alarm 17 does not alarm, indicating that the non-expansion fire retardant coating has a qualified adsorption strength with the surface of the steel plate specimen in the low temperature environment, so that the non-expansion fire retardant coating is not easy to shrink and crack in the low temperature environment. Otherwise, the alarm 17 alarms, which is unsatisfactory. At the same time, the PLC controller 16 controls the second electric push rod 15 to retract, and the vacuum pump 71 stops pumping air, and the second electric push rod 15 drives the sealing cover 64 to rise to the initial position. This mechanism enables the non-expansion fire retardant coating anti-cracking performance detection device to have high temperature and low temperature environment simulation functions, and can detect the adsorption strength of the non-expansion fire retardant coating under high temperature and low temperature environments, and at the same time detect the anti-cracking performance of the non-expansion fire retardant coating through the adsorption strength, so that the non-expansion fire retardant coating anti-cracking performance detection is more in line with the actual use environment, which can not only improve the accuracy of the non-expansion fire retardant coating anti-cracking performance detection, but also improve the reliability of the use of the non-expansion fire retardant coating anti-cracking performance detection device, and can ensure the qualified rate of the non-expansion fire retardant coating production.

[0028] When the non-expansion fire retardant coating on the surface of the steel plate specimen has qualified anti-cracking performance under high and low temperature environments, the PLC controller 16 controls the hot and cold environment regulating mechanism 8 to work, and the hot and cold environment regulating mechanism 8 can simulate from a high temperature environment to a low temperature environment, and the high temperature environment and the low temperature environment are simulated for 5 minutes respectively. At the same time, the PLC controller 16 controls the second electric push rod 15 to push the sealing cover 64 downward, so that the sealing rubber ring 65 at the bottom of the sealing cover 64 is in sealing contact with the non-expansion fire retardant coating of the steel plate specimen, and during the temperature change, the PLC controller 16 also controls the electromagnetic push rod 91 to work many times. After the moving end of the electromagnetic push rod 91 is extended, it pushes the L-shaped knocking square rod 92 outward, and the L-shaped knocking square rod 92 drives the reset spring 93 to be compressed, and the reset spring 93 The compression generates a restoring force, and then the PLC controller 16 controls the extended electromagnetic push rod 91 to instantly retract its moving end. At this time, the L-shaped knocking square rod 92 loses the constraint of the electromagnetic push rod 91, and the bottom end of the L-shaped knocking square rod 92 impacts the non-expansion fire retardant coating under the action of the restoring force of the reset spring 93, and the impact force of the bottom end of the L-shaped knocking square rod 92 meets the maximum impact strength designed for the non-expansion fire retardant coating. After the L-shaped knocking square rod 92 impacts, the ultrasonic flaw detector body 1 and the ultrasonic probe 2 perform crack damage detection on the non-expansion fire retardant coating in real time. The L-shaped knocking square rod 92 can be impacted multiple times in high and low temperature environments, and after the hot and cold environment control mechanism 8 cycles through high and low temperature environments once, the PLC controller 16 controls the servo motor 5 1 output end rotates, servo motor 51 rotates obtuse angle bent plate 62 ninety degrees through gear 52 and outer gear ring 53, obtuse angle bent plate 62 drives coating layer adsorption strength detection mechanism 6 to rotate ninety degrees, so that coating layer adsorption strength detection mechanism 6 changes position, obtuse angle bent plate 62 rotates three times in total, PLC controller 16 controls cold and hot environment control mechanism 8 and knock test mechanism 9 to perform non-expansion fire retardant coating anti-cracking performance detection, and the richness of detection is improved by detecting the anti-cracking performance of non-expansion fire retardant coating at multiple positions. In this process, if PLC controller 16 controls alarm 17 not to alarm, the impact resistance of non-expansion fire retardant coating is qualified, and then the anti-cracking performance of non-expansion fire retardant coating is qualified, otherwise alarm 17 alarms, indicating that non-expansion fire retardant coating is qualified. The anti-cracking performance is unqualified. This mechanism enables the non-expansion fire retardant coating anti-cracking performance detection device to have the function of detecting the impact anti-cracking performance of non-expansion fire retardant coatings under high and low temperature environments, and the device also has the ability of multi-position detection, further improving the richness of the non-expansion fire retardant coating anti-cracking performance detection, making the non-expansion fire retardant coating anti-cracking performance detection more in line with the actual use environment, not only can it improve the accuracy of the non-expansion fire retardant coating anti-cracking performance detection, but also can improve the reliability of the use of the non-expansion fire retardant coating anti-cracking performance detection device, and can ensure the qualified rate of non-expansion fire retardant coating production. By simulating the temperature changes and impact conditions in the actual environment, it can more comprehensively evaluate the anti-cracking performance of the coating, and provide more accurate quality assurance for the production and application of the coating.The coating can play a good role in fire prevention and crack prevention in various complex environments, reduce the potential safety hazards caused by insufficient coating performance, and improve the safety and durability of building structures.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for detecting crack resistance of non-expanding fire retardant coating, comprising an ultrasonic flaw detector body (1), an ultrasonic probe (2) and a hollow support platform (3), characterized in that: The lower surface of the hollow support platform (3) is fixedly connected to two support frames (4); the outer walls on both sides of the hollow support platform (3) are slidably connected to a U-shaped clamping plate (19); the lower surface of the U-shaped clamping plate (19) is provided with two rectangular through holes (10) that match the support frames (4); one of the side walls of the support frames (4) is fixedly connected to a fixing frame (11); the interior of the fixing frame (11) is fixedly connected to a push switch (12); a first electric push rod (13) is fixedly embedded at the bottom end of the hollow support platform (3); the moving end of the first electric push rod (13) is fixedly connected to the inner wall of the U-shaped clamping plate (19); the upper surface of the U-shaped clamping plate (19) is fixedly connected to a U-shaped top plate (14); The bottom end of the ultrasonic flaw detector body (1) is fixedly connected to the upper surface of a U-shaped top plate (14); a second electric push rod (15) is fixedly embedded in the top of the U-shaped top plate (14); the bottom end of the second electric push rod (15) is fixedly connected to a coating layer adsorption strength detection mechanism (6); the outer wall of the U-shaped top plate (14) is fixedly connected to a PLC controller (16) and an alarm (17); the inside of the U-shaped top plate (14) is fixedly connected to an air supply assembly (7); the inner wall of the bottom end of the hollow support platform (3) is fixedly connected to a hollow ring (18); the first electric push rod (13) is located at the center of the hollow ring (18); and the inner wall of the hollow ring (18) is fixedly connected to a cold and hot environment control mechanism (8).

2. The anti-cracking performance detection device for non-expansive fire retardant coating according to claim 1, characterized in that: The coating layer adsorption strength detection mechanism (6) comprises a fixed rod (61) fixedly connected to the moving end of the second electric push rod (15); the bottom end of the fixed rod (61) is connected to an obtuse-angled bent plate (62) via a rolling bearing; the top end of the ultrasonic probe (2) is fixedly embedded in the obtuse-angled bent plate (62); the data wire of the ultrasonic probe (2) is electrically connected to the input end of the ultrasonic flaw detector body (1); and the output end of the ultrasonic flaw detector body (1) is electrically connected to the input end of the PLC controller (16) via a wire. The obtuse-angle bent plate (62) is connected to a horizontal portion of the outer wall thereof, a deflection assembly (5) and a connecting pipe (63) are fixedly sleeved, a sealing cover (64) is fixedly sleeved on the bottom end outer wall of the connecting pipe (63), a sealing rubber ring (65) is fixedly sleeved on the bottom end of the sealing cover (64), an exhaust check valve (66) is fixedly connected to the bottom inner wall of the connecting pipe (63), an air pressure sensor (67) is fixedly connected to the inner side of the sealing cover (64), and a knocking test mechanism (9) is connected to the inclined portion outer wall of the obtuse-angle bent plate (62).

3. The anti-cracking performance detection device for non-expansive fire retardant coating according to claim 2, characterized in that: The deflection assembly (5) comprises a servo motor (51) fixedly connected to the horizontal portion of the obtuse-angle bent plate (62); an output end of the servo motor (51) passes through the upper surface of the horizontal portion of the obtuse-angle bent plate (62) and is fixedly connected to a gear (52); and an outer gear ring (53) meshing with the gear (52) is fixedly sleeved on a rod wall of the fixed rod (61).

4. The anti-cracking performance detection device for non-expansive fire retardant coating according to claim 2, characterized in that: The knocking test mechanism (9) comprises an electromagnetic push rod (91) fixedly sleeved with the inclined portion of the obtuse-angle bent plate (62); an outer wall of the inclined portion of the obtuse-angle bent plate (62) is provided with an inclined square hole, and an L-shaped knocking square rod (92) is movably connected to the hole wall of the inclined square hole; the top horizontal portion of the L-shaped knocking square rod (92) is located on the central extension line of the moving end of the electromagnetic push rod (91); the bottom end of the L-shaped knocking square rod (92) passes through the inner wall of the sealing cover (64); The outer wall of the sealing cover (64) is provided with a rectangular hole which matches the outer wall of the L-shaped knocking square rod (92); a return spring (93) is fixedly sleeved on the rod wall of the L-shaped knocking square rod (92); the top end of the return spring (93) is fixedly connected to the inner wall of the obtuse-angle bent plate (62); a sealing telescopic cover (94) is fixedly sleeved on the rod wall of the L-shaped knocking square rod (92); and the outer wall of the sealing telescopic cover (94) is fixedly connected to the inner wall of the sealing cover (64).

5. The anti-cracking performance detection device for non-expansive fire retardant coating according to claim 1, characterized in that: The air supply assembly (7) comprises an air pump (71) fixedly connected to the inner wall of the U-shaped top plate (14); the air inlet end of the air pump (71) is fixedly connected to a first hose (72); the air inlet end of the first hose (72) is fixedly connected to a three-way reversing solenoid valve (73); the bottom air inlet end of the three-way reversing solenoid valve (73) is fixedly connected to the top end of the connecting pipe (63); the air outlet end of the air pump (71) is fixedly connected to a second hose (74); the air outlet end of the second hose (74) passes through the inner wall of the hollow support platform (3) and is fixedly connected to the side wall of the hollow ring (18); and the upper surface of the U-shaped top plate (14) is provided with a through hole (75) that matches the first hose (72).

6. The device for detecting crack resistance of non-expanding fire retardant coating according to claim 5, characterized in that: The cold and hot environment control mechanism (8) comprises a plurality of electric heating tubes (81) fixedly embedded in the side wall of the hollow ring (18); the tube walls of the plurality of electric heating tubes (81) are commonly fixedly sleeved with a plurality of first metal mesh plates (82); the plurality of first metal mesh plates (82) are all located outside the air outlet end of the second hose (74); a fixed through hole is provided on the upper surface of the hollow ring (18); a semiconductor refrigeration plate (83) is fixedly connected to the hole wall of the fixed through hole; a plurality of second metal mesh plates (84) are fixedly connected to the refrigeration side of the semiconductor refrigeration plate (83); the bottom end of the hollow ring (18) is fixedly connected to a Y-shaped tube (85); and the interior of the vertical portion of the U-shaped clamping plate (19) is provided with a An air guide cavity (86), the outer walls of the top ends of both sides of the U-shaped clamp (19) are provided with a plurality of assembly holes, and the hole walls of the assembly holes are fixedly connected with a one-way air nozzle (87), the air inlet end of the one-way air nozzle (87) is connected with the air guide cavity (86), the two air outlet ends of the Y-shaped tube (85) are respectively connected with the air guide cavity (86) at the two vertical parts of the U-shaped clamp (19), a temperature sensor (88) is fixedly embedded in the outer wall of the vertical part of the U-shaped clamp (19), and the detection end of the temperature sensor (88) extends into the interior of the air guide cavity (86), and the upper surface of the hollow ring (18) is fixedly connected with a cooling auxiliary mechanism (89) for heat dissipation of the heat dissipation end of the semiconductor refrigeration plate (83).

7. The device for detecting crack resistance of non-expansive fire retardant coating according to claim 6, characterized in that: The cooling auxiliary mechanism (89) comprises a connecting cover (891) fixedly connected to the upper surface of the hollow ring (18); the wall of the second hose (74) is fixedly connected to a normally closed solenoid valve (892); the outlet end of the normally closed solenoid valve (892) is fixedly connected to a third hose (893); the bottom end of the hollow support platform (3) is fixedly connected to an L-shaped metal tube (894); the air inlet end of the L-shaped metal tube (894) passes through the connecting cover (891) and is fixedly connected to the outlet end of the third hose (893); the wall of the L-shaped metal tube (894) located inside the connecting cover (891) is fixedly sleeved with a metal fin (895); and the bottom end of the connecting cover (891) is filled with a coolant layer (896).

8. The device for detecting crack resistance of non-expanding fire retardant coating according to claim 1, characterized in that: The outer walls on both sides of the U-shaped clamping plate (19) are movably sleeved with a limit cover (20), the top outer wall of the limit cover (20) is fixedly connected to the outer wall of the hollow support platform (3), and the top side wall of the limit cover (20) is provided with a mounting groove that matches the vertical portion of the U-shaped clamping plate (19).

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