Coating type catalyst coating adhesion firmness detection device and detection method

Abstract

The invention discloses a coating type catalyst coating adhesion firmness detection device and a detection method. The detection device is composed of a main body device, an industrial dust collector and a compressed air freeze dryer. The main body device is composed of a main body device frame, a nozzle XYZ three-direction moving mechanism, a carrier tool, a dust collecting box, a digital display pressure adjusting device, a gas flow meter, a nozzle, a compressed air conveying pipeline, an electrical control system and the like. External compressed air is freeze-dried by the compressed air freeze-drying machine, enters the digital display pressure adjusting device to adjust the pressure and then flows into the gas flow meter, and the compressed air is subjected to flow adjustment by the gas flow meter and flows out through the nozzle to purge the catalyst carrier. The pressure and flow of purging airflow can be adjusted according to process requirements, the nozzle can move in the X direction, the Y direction and the Z direction, the distance between the nozzle and the end face of a carrier, the moving speed of the nozzle, the moving path of the nozzle and the number of purging cycles can be set, and the coating adhesive force of a catalyst can be effectively detected.

Description

Technical Field

[0001] The present invention relates to a detection device and method for the firm adhesion of a coated catalyst coating, in particular to a detection applicable to the firm adhesion of an automotive catalyst carrier coating, and applicable to the detection of the firm adhesion of automotive catalyst coatings on silicon carbide and cordierite cylindrical honeycomb carriers. Background Art

[0002] Automotive catalysts are made by mixing platinum / palladium / rhodium trimetal and rare earth materials into a slurry, and applying the slurry to the pore walls of a honeycomb carrier through a coating device, followed by heat treatment. The firm adhesion of the coating on the pore walls is an important factor affecting the product quality and service life of automotive catalysts. If the coating attached to the carrier pore walls falls off from the carrier pore walls due to insufficient firm adhesion to meet the process requirements, it will directly lead to a shortened service life of the automotive catalyst and a conversion efficiency that does not meet the emission regulation requirements. Therefore, detecting the firm adhesion of the coating is an important link in the manufacturing process of automotive catalysts.

[0003] Currently, there are various types of automotive catalysts, such as TWC, CGPF, CDPF, DOC, SCR, ASC, etc. The national standard GB / T 29914-2013 and the industry standard T / CAEP 136.1-2021 (Technical Requirements for Pollution Control Devices for Gasoline Vehicles) have clear method requirements for the detection of the firm adhesion of the coatings of these catalysts, but there are no clear regulations on the technical details of how to implement the methods. In the industry, there is no unity in the technologies adopted and the types targeted for the detection of the firm adhesion of catalyst coatings by each automotive catalyst manufacturer.

[0004] With the implementation of the National VI emission regulations, the automotive catalyst coating process has become increasingly complex, and higher requirements have been put forward for the durability of catalysts. Correspondingly, more stringent requirements have been placed on the firm adhesion of the catalyst coatings. Therefore, how to quickly and accurately evaluate the firm adhesion of the catalyst coatings has become urgent. Summary of the Invention

[0005] Under the premise that the National VI emission regulations have more stringent requirements for the adhesion of catalyst coatings, there is an urgent need for an evaluation device and method for the adhesion of catalyst coatings. How to achieve reliable detection of the adhesion of catalyst coatings through a detection device, ensure that the firm adhesion of the coating meets the process design requirements and factory standards, so as to ensure the designed service life and emission compliance of the product under the National VI emission regulations, is the technical problem to be solved by the present invention.

[0006] The technical solution adopted by the present invention to solve its technical problems is as follows:

[0007] On the one hand, the present invention provides a detection device for the firm adhesion of a coated catalyst coating, which includes a main device, an industrial vacuum cleaner, and a compressed air freeze dryer.

[0008] The main device is located in the middle position, with an industrial vacuum cleaner on its left side connected by a dust collection pipe, and a compressed air freeze dryer on its right side connected by a gas pipe; the main device is composed of a main device frame, a nozzle XYZ three-directional moving mechanism, a carrier tooling, a dust collection box, a digital pressure regulating device, a gas flow meter, a nozzle, a compressed air delivery pipeline, an electrical control system, etc.

[0009] The main frame is constructed of industrial aluminum alloy profiles of different lengths, and supported by 6 rubber support feet at the bottom of the constructed frame. The formed frame is used to place and fix the nozzle XYZ three-directional moving mechanism, carrier tooling, dust collection box, digital pressure regulating device, gas flow meter, nozzle, and electrical control system.

[0010] The XYZ three-direction moving mechanism of the nozzle is located just above the dust collection box on the left side below the inside of the main frame, and is responsible for the XYZ three-direction movement of the nozzle. It is composed of 5 sets of servo motor screw slide modules, of which 1 set of servo motor screw slide modules is responsible for X-direction movement, 2 sets of servo motor screw slide modules symmetrically arranged on the left and right are responsible for Y-direction movement, and 2 sets of servo motor screw slide modules symmetrically arranged on the left and right are responsible for Z-direction movement. The servo motor of the servo motor screw slide module is electrically connected to the electrical control system. Specifically, the Z-direction servo motor screw slide module is longitudinally and horizontally installed on the top surface of the dust collection box, the Y-direction servo motor screw slide module is vertically installed on the moving slide of the Z-direction servo motor screw slide module, and the X-direction servo motor screw slide module is horizontally installed on the moving slide of the Y-direction servo motor screw slide module.

[0011] The nozzle is fixed on the moving slide of the X-axis servo motor screw slide module through a simple clamp.

[0012] When the nozzle needs to move in the X direction, the servo motor of the X-direction servo motor lead screw slide module is powered on to control the forward and reverse rotation, and the lead screw connected to the servo motor is synchronously forward and reversed. Because the lead screw is threadedly connected to the movable slide, the movable slide moves, and the nozzle fixed on the movable slide moves left and right in the X direction accordingly.

[0013] When the nozzle needs to move in the Y direction, the servo motor of the Y-direction servo motor lead screw slide module is powered on to control the forward and reverse rotation, and the lead screw connected to the servo motor rotates forward and reverse synchronously. Since the lead screw is threadedly connected to the movable slide, the movable slide moves, and the X-direction servo motor lead screw slide module fixed on the movable slide moves up and down in the Y direction as a whole. Since the nozzle is fixed on the X-direction servo motor lead screw slide module, it also moves up and down in the Y direction.

[0014] When the nozzle needs to move in the Z direction only, the servo motor of the Z-axis servo motor lead screw slide table module is energized to control forward and reverse rotation. The lead screw connected to the servo motor rotates forward and reverse synchronously. Since the lead screw is threadedly connected to the moving slide table, the moving slide table moves, and the entire Y-axis servo motor lead screw slide table module fixed on the moving slide table moves forward and backward in the Z direction. Since the entire X-axis servo motor lead screw slide table module is fixed on the Y-axis servo motor lead screw slide table module and the nozzle is fixed on the X-axis servo motor lead screw slide table module, the nozzle also moves in the Z direction.

[0015] When the nozzle needs to move in the XYZ three directions, the control system can simultaneously send control commands to the servo motors of the XYZ servo motor lead screw slide table modules.

[0016] The carrier tooling is located directly above the dust collection box. It is processed into a disc from aluminum alloy plates of a certain thickness. A round hole runs through the center of the disc vertically. A bearing platform is formed inside the round hole for placing and fixing the carrier. A step is formed at the lower part of the disc for fitting and fixing with the round hole at the top of the dust collection box.

[0017] The dust collection box is located at the lower left inside the main frame. It is surrounded by stainless steel plates of a certain thickness and industrial aluminum alloy profiles of the main frame. A round hole is centered at the top of the dust collection box for placing and positioning the carrier tooling. The function of the dust collection box is to collect the slurry when it falls off during the air blowing process.

[0018] The digital display pressure regulating device is located at the upper right outside the main frame and is fixed to the main frame by bolts. Its function is to filter the water vapor, oil vapor, and dust impurities from the compressed air, playing an air purification role. At the same time, through the adjustment of the pressure reducing valve of the digital display pressure regulating device, a stable air flow working pressure is provided for the nozzle.

[0019] The gas flow meter is located below the digital display pressure regulating device. It is fixed to the main frame by bolts and aluminum alloy plates of a certain thickness. Its function is to provide the working air flow rate for the nozzle.

[0020] The nozzle is located above the carrier tooling. It is firmly and vertically connected to the moving slide table of the X-axis moving servo motor lead screw slide table module through a simple fixture and bolts, and is connected to the gas flow meter through a gas pipeline. Compressed air is ejected through the gas flow meter and the gas pipeline through the nozzle for purging the catalyst carrier.

[0021] The compressed air transmission pipeline is for the closed transmission of compressed air and is used to connect the nozzle and the gas flow meter, the gas flow meter and the digital display pressure regulating device, and the digital display pressure regulating device and the outlet filter of the compressed air refrigeration dryer.

[0022] The electrical control system consists of a touch screen PLC and an electrical control system cabinet, and is used to control and realize the distance, moving speed, purging path and purging cycle times of the nozzle on the upper end face of the catalyst carrier.

[0023] The touch screen PLC is located at the upper right outside of the main frame, and is fixed to the main frame through bolts and aluminum alloy plates with a certain thickness, and is electrically connected to the electrical components in the electrical control system cabinet.

[0024] The electrical control system cabinet is located at the lower right inside the main frame, and is surrounded by stainless steel plates with a certain thickness and industrial aluminum alloy profiles of the main frame, and is used for placing electrical control components. Buttons and indicator lights are placed on the outer panel of the cabinet.

[0025] The industrial vacuum cleaner is located on the left side of the main device, and is connected to the dust collection box inside the main device through a dust collection pipeline, and is used for the recovery of the falling slurry during the air purging process, preventing environmental pollution and the recycling of the falling slurry. The industrial dust collector is equipped with its own electric control system and is independently controlled by connecting to an external power supply through a cable.

[0026] The compressed air refrigeration dryer is located on the right side of the main device, is connected to external compressed air through an air inlet filter, and is connected to the digital display pressure regulating device of the main device through an air outlet filter and a pipeline. The compressed air refrigeration dryer must be configured and placed close to the equipment. Its functions include: ① Removing impurities: When detecting the adhesion firmness of the automotive catalyst carrier coating, compressed air is required for purging. However, the compressed air not only contains moisture but also contains impurities (a. from the air compressor itself: oil stains, oil vapors, metal powders generated during operation, rubber fines generated due to aging of seals, tar particles and fines of filter materials, etc.; b. from the process of compressed air transmission: due to the long-term pressure, water vapor and oil stain on the inner wall of the compressed air transmission pipeline, rust occurs and falls off to form), which are easily attached to the inner wall of the carrier pores, causing changes in the weight of the test carrier and affecting the accuracy of the test data. Therefore, it is necessary to remove impurities before entering the digital display pressure regulating device to obtain clean compressed air for purging; ② Removing moisture: In order to eliminate the adverse effect of the water-vapor mixed air flow formed by the condensation effect of the compressed air due to the change of the external temperature (low temperature) of the transmission pipeline on the accuracy of the test data.

[0027] The compressed air refrigeration dryer is equipped with its own electric control system and is independently controlled by connecting to an external power supply through a cable.

[0028] On the other hand, the present invention also provides a detection method based on the above-mentioned detection device for the adhesion firmness of the coating type catalyst coating, which includes the following steps.

[0029] 1. Pretreatment of the carrier to be detected: Put the type of catalyst carrier to be detected into a hot air drying oven for drying. After drying, weigh the carrier and record the weight data.

[0030] 2. Purge of the carrier to be detected: According to the type of catalyst carrier to be detected, set the compressed air pressure, flow rate, and purge cycle times required by the purge process. Put the carrier to be detected into the carrier tooling and start the purge.

[0031] 3. Post-treatment of the carrier to be detected: After purging, take out the carrier from the carrier tooling and put it into a hot air drying oven for drying. After drying, weigh the carrier and record the weight data.

[0032] 4. Evaluation of coating adhesion: Calculate the difference between the two weight data weighed before and after purging. When the value meets the process requirements, it can be determined that the coating has not peeled off and the product quality meets the quality standard. When the value deviates from the process requirements, it can be determined that the coating adhesion does not meet the process requirements.

[0033] The working principle of the device of the present invention includes:

[0034] After the external compressed air is freeze-dried and decontaminated by a compressed air refrigeration dryer, it enters a digital display pressure regulating device to adjust the pressure and then flows into a gas flow meter. The compressed air flows out after the flow rate is adjusted by the gas flow meter, flows through a gas pipeline to a nozzle, and flows out from the nozzle to act on the catalyst carrier. Specifically, as Figure 1 shown. ① Start the supporting device: The operator turns on the industrial vacuum cleaner and the compressed air refrigeration dryer and ensures that the external compressed air supply is normal. ② Adjust the parameters of the main device: The operator vertically places the carrier to be detected on the carrier tooling inside the main device. According to the process requirements, adjust the digital display pressure regulating device to ensure that the purge air flow pressure meets the requirements. Adjust the gas flow meter to ensure that the purge air flow rate meets the requirements. Set the parameters of the XYZ three-direction servo motor lead screw slide table module through the touch screen PLC to ensure that the distance between the nozzle and the carrier end face, the nozzle movement speed, the nozzle movement path, and the purge cycle times meet the requirements. ③ Start the test: After the parameters of the main device are set, the operation of the main device can be started to complete the detection work of the adhesion of the catalyst slurry. During the detection process, the industrial vacuum cleaner captures the falling slurry dust caused by the air flow purge of the catalyst carrier through negative pressure, and the compressed air refrigeration dryer continuously freeze-dries and decontaminates the external compressed air to ensure the dryness and cleanliness of the purge air flow from the nozzle.

[0035] The beneficial effects of the present invention include:

[0036] 1. Established an enterprise self-use standard for the device and application for detecting the adhesion of automotive catalyst coatings;

[0037] 2. This self - used standard has been on - site reviewed and recognized by domestic leading mainstream vehicle manufacturers, providing a good application example for the promotion of this standard in the industry.

[0038] 3. The device of the present invention has the advantages of high reliability, convenient maintenance, and applicability to a variety of catalyst carrier types and specifications. It is an ideal device for detecting the adhesion of the SiC / cordierite honeycomb National VI vehicle catalyst coating. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The present invention will be further described below in conjunction with the drawings and embodiments:

[0040] Figure 1 It is a schematic three - dimensional structure diagram of the present invention;

[0041] Figure 2 It is a front view of the present invention;

[0042] Figure 3 It is a top view of the present invention;

[0043] Figure 4 It is a left - hand view of the present invention;

[0044] Figure 5 It is a view of the carrier tooling of the present invention, where (a) is an axonometric view, (b) is a top view, (c) is a cross - sectional view, and (d) is a front view;

[0045] Figure 6 It is a schematic top - view of the nozzle purging path of the present invention.

[0046] The reference numerals in the drawings are:

[0047] 0 - catalyst carrier, 1 - main device, 2 - industrial vacuum cleaner, 3 - compressed air freeze - dryer;

[0048] X - moving direction of nozzle X, Z - moving direction of nozzle Z;

[0049] 00 - end face of catalyst carrier, 10 - frame of main device, 11 - three - direction moving mechanism of nozzle XYZ, 12 - carrier tooling, 13 - dust collection box, 14 - digital display pressure regulating device, 15 - gas flowmeter, 16 - electrical control system, 17 - nozzle, 18 - gas pipeline;

[0050] 21 - dust collection pipeline; 31 - intake filter of compressed air cold dryer, 32 - outlet filter of compressed air cold dryer;

[0051] 160 - touch - screen PLC, 161 - electrical control system cabinet;

[0052] 171 - The starting position when the number of nozzle purging times is odd or the ending position when the number of nozzle purging times is even, 172 - The starting position when the number of nozzle purging times is even or the ending position when the number of nozzle purging times is odd;

[0053] 181 - Outlet pipe of the gas flowmeter, 182 - Outlet gas pipe of the compressed air cold dryer;

[0054] 310 - Inlet of the inlet filter 31 of the compressed air cold dryer;

[0055] 1110 - X - direction moving servo - motor lead - screw slide module, 1120, 1121 - Y - direction moving servo - motor lead - screw slide modules symmetrically arranged on the left and right, 1130, 1131 - Z - direction moving servo - motor lead - screw slide modules symmetrically arranged on the left and right. Detailed implementation mode

[0056] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0057] In an embodiment of the present invention, a device for detecting the adhesion firmness of an automotive catalyst carrier coating slurry is provided. For the specific structure, refer to Figures 1 to 4 , which can be used for detecting the adhesion firmness of the honeycomb cylinder automotive catalyst slurry.

[0058] As Figure 1 shown, a detecting device for the firmness of a coated catalyst coating is composed of a main device 1, an industrial vacuum cleaner 2 and a compressed air refrigeration dryer 3.

[0059] The main device 1 is located in the middle of the device of the present invention. The industrial vacuum cleaner 2 is on its left side, connected through a dust collection pipe 21, and the compressed air refrigeration dryer 3 is on its right side, connected through a gas flowmeter inlet pipe 182.

[0060] The main device 1 is composed of a main device frame 10, a nozzle XYZ three - direction moving mechanism 11, a carrier tooling 12, a dust collection box 13, a digital display pressure regulating device 14, a gas flowmeter 15, an electrical control system 16, a nozzle 17, and a gas pipeline 18.

[0061] The main body frame 10 is built by industrial aluminum alloy profiles of unequal lengths, and is supported by 6 rubber support feet at the bottom of the built frame. The formed frame is used for the placement and fixation of the nozzle XYZ three-direction movement mechanism 11, the carrier tooling 12, the dust collection box 13, the digital display pressure regulating device 14, the gas flow meter 15, the electrical control system 16, the nozzle 17, and the gas pipeline 18.

[0062] The nozzle XYZ three-direction movement mechanism 11 is located directly above the dust collection box 13 on the lower left side inside the main body frame 10, and is responsible for the XYZ three-direction movement of the nozzle 17. It is composed of an X-direction movement servo motor lead screw slide table module 1110, Y-direction movement servo motor lead screw slide table modules 1120 and 1121, and Z-direction movement servo motor lead screw slide table modules 1130 and 1131. Specifically, the Z-direction movement servo motor lead screw slide table modules 1130 and 1131 are located on the left and right sides of the carrier tooling 12, and the bases of the Z-direction movement servo motor lead screw slide table modules 1130 and 1131 are fixedly connected to the top surface of the dust collection box 13 by bolts. The Y-direction movement servo motor lead screw slide table modules 1120 and 1121 are located above the Z-direction movement servo motor lead screw slide table modules 1130 and 1131. The Y-direction movement servo motor lead screw slide table module 1120 is vertically installed and fixed on the moving slide table of the Z-direction movement servo motor lead screw slide table module 1130, and the Y-direction movement servo motor lead screw slide table module 1121 is vertically installed and fixed on the moving slide table of the Z-direction movement servo motor lead screw slide table module 1131. The X-direction movement servo motor lead screw slide table module 1110 is integrally installed and fixed on the moving slide tables of the Y-direction movement servo motor lead screw slide table modules 1120 and 1121. The nozzle 17 is installed and fixed on the moving slide table of the X-direction movement servo motor lead screw slide table module 1110 by a simple fixture. When the moving slide table of the X-direction movement servo motor lead screw slide table module 1110 moves left and right in the X direction, the nozzle installed and fixed on the moving slide table also moves left and right in the X direction. When the moving slide tables of the Y-direction movement servo motor lead screw slide table modules 1120 and 1121 move up and down in the Y direction, the X-direction movement servo motor lead screw slide table module 1110 installed and fixed on the moving slide table also moves up and down in the Y direction. When the moving slide tables of the Z-direction movement servo motor lead screw slide table modules 1130 and 1131 move back and forth in the Z direction, the Y-direction movement servo motor lead screw slide table modules 1120 and 1121 installed and fixed on the moving slide table also move back and forth in the Z direction. Through the combination of the moving slide tables on the above-mentioned various direction movement servo motor lead screw slide table modules, the XYZ three-direction movement of the nozzle 17 is realized.

[0063] The carrier tooling 12 is located directly above the dust collection box 13. Specifically, as Figure 5As shown in the figure, a disc is processed from an aluminum alloy plate with a certain thickness. A circular hole runs through the center of the disc from top to bottom, and a bearing platform is formed inside the circular hole for placing and fixing the carrier. A step is formed at the lower part of the disc for fitting and fixing with the circular hole at the top of the dust collection box 13.

[0064] The dust collection box 13 is located at the lower left inside the main frame 10 and is surrounded by a stainless steel plate with a certain thickness and the industrial aluminum alloy profile of the main frame 10. A circular hole is centered at the top of the dust collection box 13 for placing and positioning the carrier tooling 12.

[0065] The digital display pressure regulating device 14 is located at the upper right outside the main frame 10 and is fixed to the main frame 10 by bolts. Its function is to filter water vapor, oil vapor, and dust impurities from the compressed air, playing an air purification role. At the same time, through the adjustment of the pressure reducing valve, a stable air flow working pressure is provided for the nozzle.

[0066] The gas flowmeter 15 is located below the digital display pressure regulating device 14 and is fixed to the main frame 10 by bolts and an aluminum alloy plate with a certain thickness. Its function is to provide a stable air flow working flow for the nozzle.

[0067] The electrical control system 16 consists of a touch screen PLC 160 and an electrical control system cabinet 161, which is used for the operation control of the main device 1. The touch screen PLC 160 is located at the upper right outside the main frame 10 and is fixed to the main frame 10 by bolts and an aluminum alloy plate with a certain thickness, and is electrically connected to the electrical components inside the electrical control system cabinet 161. The electrical control system cabinet 161 is located at the lower right inside the main frame and is surrounded by a stainless steel plate with a certain thickness and the industrial aluminum alloy profile of the main frame, and is used for placing electrical control components. Buttons and indicators are placed on the outer panel of the cabinet. The touch screen PLC 160 has a built-in control program, and this control program can realize parameter setting for the Y-direction moving servo motor lead screw slide table modules 1120 and 1121 through the touch screen PLC 160, realizing the up and down movement adjustment of the moving slide table in the Y direction to ensure the distance between the nozzle 17 and the upper end face of the catalyst carrier to be detected; parameter setting for the X-direction moving servo motor lead screw slide table module 1110 and the Z-direction moving servo motor lead screw slide table modules 1130 and 1131 to ensure that the nozzle 17 blows according to the set moving speed, blowing path, and cyclic blowing times.

[0068] The nozzle 17 is located above the carrier tooling 12 and is a stainless steel round pipe with a certain length and diameter. It is fixed to the moving slide of the X-direction moving servo motor lead screw slide table module 1110 by a simple fixture and bolts, and the round pipe stands perpendicular to the carrier tooling 12. One end of the round pipe facing up is connected to the air outlet pipe 181 of the gas flowmeter, and the end facing down faces the upper end face of the carrier.

[0069] External compressed air enters the compressed air refrigerated dryer 3 through the component compressed air dryer inlet filter 31 of the compressed air refrigerated dryer 3. After the compressed air is refrigerated and dried and impurities are removed, it flows out through the compressed air dryer outlet filter 32, flows through the compressed air dryer outlet air pipe 182 to the digital display pressure regulating device 14, further flows to the gas flowmeter 15, flows out from the outlet of the gas flowmeter 15, and flows through the gas flowmeter outlet air pipe 181 to the nozzle 17, and finally flows out from the lower circular pipe orifice of the nozzle 17 to act on the catalyst carrier.

[0070] The gas pipeline 18 is composed of the gas flowmeter outlet air pipe 181 and the compressed air dryer outlet air pipe 182, and its function is the closed transportation of compressed air. Among them, the gas flowmeter outlet air pipe 181 is located between the gas flowmeter 15 and the nozzle 17. One end of the pipeline is connected to the outlet of the gas flowmeter 15, and the other end of the pipeline is connected to the nozzle 17. The pipeline material is polyurethane. The compressed air dryer outlet air pipe 182 is located between the compressed air dryer outlet filter 32 and the digital display pressure regulating device 14. One end of the pipeline is connected to the inlet of the digital display pressure regulating device 14, and the other end of the pipeline is connected to the outlet of the compressed air dryer outlet filter 32. The pipeline material is stainless steel.

[0071] The industrial vacuum cleaner 2 is located on the left side of the main body device 1 and is connected to the dust collection box 13 through the dust collection pipeline 21, which is used for the recovery of the falling slurry during the air blowing process to prevent environmental pollution and the recycling of the falling slurry. The industrial dust collector 2 is equipped with its own electronic control system and is independently controlled by connecting to an external power supply through a cable.

[0072] The compressed air refrigerated dryer 3 is placed near the right side of the main body device 1. External compressed air is introduced through the inlet 310 of the component compressed air dryer inlet filter 31. The component compressed air dryer outlet filter 32 of it is connected to the inlet of the digital display pressure regulating device 14 through the compressed air dryer outlet air pipe 182, realizing the precipitation of moisture in the compressed air and filtering impurities through the gas filter to obtain dry and clean compressed air for blowing. The compressed air refrigerated dryer 3 is equipped with its own electronic control system and is independently controlled by connecting to an external power supply through a cable.

[0073] The touch screen PLC 160 can be obtained commercially, such as SIEMENS ST-X00 series PLC, etc., and a configuration with a built-in touch screen can be selected. Through the data communication port and I / O interfaces such as DI / DO, AI / AO of the touch screen PLC 160 itself and the configuration function provided by the manufacturer, the X-direction moving servo motor lead screw slide table module (when realizing nozzle blowing, such as Figure 6The horizontally moving left and right (as shown), the Y-direction moving servo motor screw slide module symmetrically arranged on the left and right (to set the distance between the nozzle and the upper end face of the carrier during nozzle purging), and the Z-direction moving servo motor screw slide module symmetrically arranged on the left and right (to achieve the up and down step movement as shown) for start / stop, forward / reverse and other logical controls, and form a human-machine interface such as parameter setting and purging start / stop buttons through configuration on the touch screen. Figure 6 The start / stop, forward / reverse and other logical controls of the up and down step movement (as shown) and form a human-machine interface such as parameter setting and purging start / stop buttons through configuration on the touch screen.

[0074] The effectiveness of the detection method and detection results of the present invention will be further described below in conjunction with the accompanying drawings and tables through embodiments.

[0075] The catalysts used in the experiment are the catalysts self-made by the applicant's company, and the types include TWC, DOC, SCR, ASC, etc., with numbers T-1, T-2, D-1, D-2, S-1, S-2, A-1, A-2 respectively.

[0076] Example 1

[0077] Select the catalyst product T-1, and the product information is: TWC product, specification 118.41(D)*127(H), 750 / 2.5, coating loading 150 g / L.

[0078] a. Obtain the product coating quality information M1 according to the product preparation information;

[0079] b. Constant weight: Select the catalytic converter A-1, dry it at 200 °C for 2 hours, and weigh to obtain the weight M2;

[0080] c. Purging: The operator places the catalyst carrier to be detected into the carrier tooling 12, and adjusts the moving slides of the Y-direction moving servo motor screw slide modules 1120 and 1121 up and down in the Y direction through the touch screen PLC160 and the electrical control system 16 to ensure that the distance between the nozzle 17 and the upper end face of the catalyst carrier to be detected is 1.0 - 1.5 cm; set parameters for the X-direction moving servo motor screw slide module 1110 and the Z-direction moving servo motor screw slide modules 1130 and 1131 to ensure that the nozzle 17 purges at least 3 times in a circular path at a moving speed of 4 mm / s (in line with the technical requirements for gasoline vehicle pollution control devices - 5.3.7.3 of T / CAEP 136.1-2021). Adjust the digital display pressure regulating device 14 to ensure that the purging air pressure is 0.5 - 0.6 MPa. Set the gas flowmeter 15 to ensure that the purging flow rate is not less than 100 L / min. After the above parameter setting and adjustment are completed, start the purging through the touch screen PLC160.

[0081] The purging path is as Figure 6As shown in the figure, the circle is equally spaced and divided into several horizontal strips (for purging). The length of the horizontal strip is the diameter of the carrier, and the width is not greater than the diameter of the nozzle circular tube. Specifically:

[0082] The first purging route is as follows: The nozzle 17 starts from the right - hand bottom edge position 171 of the carrier. It moves horizontally from right to left in the moving direction of nozzle X. When the moving distance reaches the left edge, the nozzle 17 moves one step upward in the moving direction of nozzle Z. The moving step is 4 mm (the diameter of the nozzle circular tube is 4 mm). After moving into place, the nozzle 17 moves horizontally from left to right in the moving direction of nozzle X. When the moving distance reaches the right edge of the carrier, the nozzle 17 moves one step upward again in the moving direction of nozzle Z. After moving into place, the nozzle 17 repeats moving horizontally from right to left in the X - direction... Continuously repeat the above actions until the cumulative moving distance of the nozzle 17 in the Z - moving direction reaches the diameter of the carrier and it is at the right - hand top edge position 172 of the nozzle, then the first purging ends; The second purging route is the reverse route of the first purging route; The third purging is the same as the first purging action; The fourth purging is the same as the second purging action... And so on until the set number of purging times is reached and the work ends;

[0083] d. Constant weight: After the purging work ends, the operator takes out the carrier from the carrier tooling 12 and puts it into a hot - air drying oven to dry for 2 hours at 200 °C, and weighs it to obtain the weight M3;

[0084] e. Coating adhesion evaluation: Calculate the coating peeling rate

[0085] Example 2

[0086] Select the catalyst product T - 2. The product information is: TWC product, with specifications of 132.1 (D) * 101.6 (H), 400 / 4.5, and a coating loading of 240 g / L.

[0087] Operate according to steps a - e in Example 1.

[0088] Example 3

[0089] Select the catalyst product D - 1. The product information is: DOC product, with specifications of 190.5 (D) * 76.2 (H), 400 / 4.5, and a coating loading of 90 g / L.

[0090] Operate according to steps a - e in Example 1.

[0091] Example 4

[0092] Select the catalyst product D - 2. The product information is: DOC product, with specifications of 143.8 (D) * 160 (H), 600 / 4.5, and a coating loading of 120 g / L.

[0093] Operate according to a to e in Example 1.

[0094] Example 5

[0095] Select catalyst product S-1, and the product information is: SCR product, specification 266.7(D)*152.4(H), 400 / 4.5, coating loading 120 g / L.

[0096] Operate according to a to e in Example 1.

[0097] Example 6

[0098] Select catalyst product S-2, and the product information is: SCR product, specification 228.6(D)*127(H), 600 / 4.5, coating loading 190 g / L.

[0099] Operate according to a to e in Example 1.

[0100] Example 7

[0101] Select catalyst product A-1, and the product information is: SCR product, specification 266.7(D)*101.6(H), 400 / 4.5, coating loading 90 g / L.

[0102] Operate according to a to e in Example 1.

[0103] Example 8

[0104] Select catalyst product 1-2, and the product information is: SCR product, specification 228.6(D)*76.2(H), 600 / 4.5, coating loading 180 g / L.

[0105] Operate according to a to e in Example 1.

[0106] The test results of the coating peeling rate in Examples 1-8 are shown in Table 1.

[0107] It can be seen from Table 1 above that the detection method in the examples can effectively identify the coating adhesion of the catalyst, providing a rapid and accurate detection means for the product.

[0108] Table 1 Results of the peeling rate of the catalytic converter coating

[0109] Number Catalyst number Coating shedding rate (%) Example 1 A-1 0.4％ Example 2 A-2 0.6 Example 3 A-3 2.1％ Example 4 A-4 0.5％ Example 5 A-5 0.4％ Example 6 A-6 0.7％ Example 7 A-7 1.2％ Example 8 A-8 0.5％

[0110] Comparative Example 1

[0111] Use the catalyst A-1 (gasoline engine product) in Example 1 above for bench aging to illustrate the effectiveness of the detection results. The steps are as follows:

[0112] ① Take the catalyst support of Example 1 and use this device and detection method to obtain the weight M2 of the catalyst support and the coating loading weight M1;

[0113] ② Use the gasoline engine bench system to carry out rapid aging (one of the industry - common aging methods, the four - stage aging cycle of General Motors - GMAC875, that is, aging for 200 h). After aging, weigh the support and record the weight data M3;

[0114] ③ Coating adhesion evaluation: Calculate the coating peeling rate

[0115] Comparative Example 2

[0116] Use the catalyst D - 1 (diesel engine product) of Example 3 above to carry out bench aging to illustrate the effectiveness of the test results. The steps are as follows:

[0117] ① Take the catalyst support of Example 3 and use this device and detection method to obtain the weight M2 of the catalyst support and the coating loading weight M1;

[0118] ② Use the diesel engine bench system to carry out fuel injection catalyst aging (the method for examining catalyst durability by leading enterprises in the industry), and the aging time is 100 h. After aging, weigh the support and record the weight data M3;

[0119] ③ Coating adhesion evaluation: Calculate the coating peeling rate

[0120] Table 2 Comparison results of the peeling rates of the catalytic converter coatings

[0121] Number Catalyst number Shedding rate Comparative Example 1 A-1 1.5％ Comparative Example 2 D-1 4.3％

[0122] As can be seen from Table 2 above, the difference between the coating peeling rate tested by the device and method of this invention and the coating peeling rate after bench aging is within 2.2% (the coating peeling rate of catalysts in the current industry is controlled within 5%). This indicates that the results tested by the device and method of this invention can accurately reflect the firm state of the coating during the actual use of the catalyst, and the evaluation results are credible.

Claims

1. A coating type catalyst coating firmness detection device, characterized in that: It is composed of a main device (1), an industrial vacuum cleaner (2) and a compressed air freeze dryer (3); The main device (1) is located in the middle position, and is composed of a main device frame (10), a nozzle XYZ three-directional moving mechanism (11), a carrier tooling (12), a dust collection box (13), a digital pressure regulating device (14), a gas flow meter (15), an electrical control system (16), a nozzle (17) and a gas pipeline (18); the nozzle (17) is installed on the nozzle XYZ three-directional moving mechanism (11), and the nozzle XYZ three-directional moving mechanism (11) is provided with a servo motor for XYZ three-directional movement, and the servo motor is electrically connected to the electrical control system (16), and through the electrical control system ( 16) controls the XYZ movement of the nozzle (17); the carrier tooling (12) is located below the nozzle (17), on which the catalyst carrier (0) is placed; the dust collection box (13) is located below the carrier tooling (12); the digital pressure regulating device (14) and the gas flow meter (15) are respectively located above and below the main frame (10), and are used to provide a stable airflow with a certain pressure for the nozzle (17); the gas pipeline (18) is used to connect the digital pressure regulating device (14), the gas flow meter (15), the nozzle (17) and the compressed air freeze dryer (3) to each other; The industrial vacuum cleaner (2) is located on the side of the main device (1) and is connected to the dust collection box (13) via a dust collection pipe (21); The compressed air freeze dryer (3) is located on the other side of the main device (1) and is connected to the inlet of the digital pressure regulating device (14) through its air outlet pipe; the compressed air freeze dryer (3) is used to freeze-dry the compressed air and remove impurities; The digital pressure regulating device (14) is used to set and regulate the pressure of compressed air, the gas flow meter (15) is used to set and regulate the flow rate of compressed air, and the electrical control system (16) is used to control the distance, movement speed, purge path and number of purge cycles of the nozzle (17) on the upper end surface of the catalyst carrier (0).

2. The coating type catalyst coating firmness detection device according to claim 1 is characterized in that: The nozzle XYZ three-directional movement mechanism (11) is composed of an X-direction moving servo motor screw slide module (1110), a Y-direction moving servo motor screw slide module (1120, 1121) symmetrically arranged, and a Z-direction moving servo motor screw slide module (1130, 1131) symmetrically arranged; the Z-direction moving servo motor screw slide module (1130, 1131) is located on the left and right sides of the carrier tooling (12), and its base is fastened to the top surface of the dust collection box (13) by bolt connection; the Y-direction moving servo motor screw slide module (1120, 1121) is symmetrically arranged, and the Z-direction moving servo motor screw slide module (1130, 1131) is located on the left and right sides of the carrier tooling (12), and its base is fastened to the top surface of the dust collection box (13) by bolt connection; 1) located above the Z-direction moving servo motor screw slide module (1130, 1131), the Y-direction moving servo motor screw slide module (1120) is vertically mounted and fixed on the moving slide of the Z-direction moving servo motor screw slide module (1130), and the Y-direction moving servo motor screw slide module (1121) is vertically mounted and fixed on the moving slide of the Z-direction moving servo motor screw slide module (1131); the X-direction moving servo motor screw slide module (1110) is integrally mounted and fixed on the moving slide of the Y-direction moving servo motor screw slide module (1120, 1121).

3. The coating type catalyst coating firmness detection device according to claim 2 is characterized in that: The nozzle (17) is fixed on a moving slide of an X-direction moving servo motor screw slide module (1110); when the moving slide of the X-direction moving servo motor screw slide module (1110) moves left and right in the X direction, the nozzle (17) fixed on the moving slide also moves left and right in the X direction accordingly; when the moving slide of the Y-direction moving servo motor screw slide module (1120, 1121) moves up and down in the Y direction, the X-direction moving servo motor screw slide module (1110) fixed on the moving slide also moves up and down in the Y direction accordingly; when the moving slide of the Z-direction moving servo motor screw slide module (1130, 1131) moves forward and backward in the Z direction, the Y-direction moving servo motor screw slide module (1120, 1121) fixed on the moving slide also moves forward and backward in the Z direction accordingly.

4. The coating type catalyst coating firmness detection device according to claim 1 is characterized in that: The gas pipeline (18) is composed of a gas flow meter outlet pipe (181) and a compressed air cold dryer outlet pipe (182), and is used for sealed conveyance of compressed air; wherein the gas flow meter outlet pipe (181) is located between the gas flow meter (15) and the nozzle (17), one end of the pipe is connected to the gas outlet of the gas flow meter (15), and the other end of the pipe is connected to the nozzle (17); the compressed air cold dryer outlet pipe (182) is located between the compressed air cold dryer outlet and the digital display pressure regulating device (14).

5. The coating type catalyst coating firmness detection device according to claim 4 is characterized in that: The compressed air freeze dryer (3) comprises a compressed air freeze dryer air inlet filter (31) and a compressed air freeze dryer air outlet filter (32); external compressed air enters the compressed air freeze dryer (3) through the compressed air freeze dryer air inlet filter (31) which is a component of the compressed air freeze dryer (3); after being freeze-dried and impurities removed, the compressed air flows out through the compressed air freeze dryer air outlet filter (32); the compressed air freeze dryer air outlet pipe (182) is connected to the compressed air freeze dryer air outlet filter (32); the compressed air freeze dryer air outlet pipe (182) flows to the digital display pressure regulating device (14); further flows to the gas flow meter (15); flows out from the gas outlet of the gas flow meter (15); flows to the nozzle (17) through the gas flow meter air outlet pipe (181); and finally flows out from the lower pipe opening of the circular pipe of the nozzle (17) to act on the catalyst carrier (0).

6. The coating type catalyst coating firmness detection device according to claim 1 is characterized in that: The nozzle (17) is a round tube of a certain length and diameter, which is fixed on the moving slide of the X-axis moving servo motor screw slide module (1110) by means of a clamp and bolts. The round tube is vertically arranged on the carrier tooling (12), and the upward end of the round tube is connected to the gas flow meter outlet pipe (181), and the downward end faces the upper end surface of the catalyst carrier (0).

7. The coating type catalyst coating firmness detection device according to claim 1 is characterized in that: The electrical control system (16) is composed of a touch screen PLC (160) and an electrical control system cabinet (161); the touch screen PLC (160) is located on the upper right side of the outer side of the main frame (10); the touch screen PLC (160) has a built-in control program, and the control program is used to control the Y-direction moving servo motor lead screw slide module (1120, 1121), the X-direction moving servo motor lead screw slide module (1110), and the Z-direction moving servo motor lead screw slide module (1130, 1131) through the touch screen PLC (160).

8. The coating type catalyst coating firmness detection device according to claim 1 is characterized in that: The dust collection box (13) is located at the lower left side of the main frame (10) and is surrounded by a plate of a certain thickness and the main frame (10). A circular hole is opened in the center of the top of the dust collection box (13) for placing and positioning the carrier tooling (12).

9. A method for detecting a coating-type catalyst coating firmness detection device according to any one of claims 1 to 8, characterized in that: include: S1 Pretreatment of the carrier to be tested: Place the catalyst carrier to be tested in a hot air drying oven for drying. After drying, weigh the carrier and record the weight data; S2 Purging of the carrier to be tested: according to the type of catalyst carrier to be tested, complete the setting of the compressed air pressure, flow rate and number of purge cycles required by the purge process, put the carrier to be tested into the carrier tooling, and start the purge; S3 Post-processing of the carrier to be tested: After the purging is completed, the carrier is taken out from the carrier tooling and placed in a hot air drying oven for drying. After the drying is completed, the carrier is weighed and the weight data is recorded; S4 coating adhesion evaluation: Calculate the difference between the two weight data measured before and after purging. When the value meets the process requirements, it can be determined that the coating has not fallen off and the product quality meets the quality standards. When the value deviates from the process requirements, it can be determined that the coating adhesion does not meet the process requirements.

10. The detection method according to claim 9, characterized in that: a) obtaining product coating weight information M1 according to the preparation information of the catalyst carrier to be tested; b) Constant weight: Select a catalytic converter, dry it at 200°C for 2 hours, and weigh it to obtain a weight M2; c) Purging: The operator places the catalyst carrier to be tested into the carrier tooling, and adjusts the moving slide of the Y-direction moving servo motor screw slide module to move up and down in the Y direction through the touch screen PLC and the electrical control system to ensure that the distance between the nozzle and the upper end surface of the catalyst carrier to be tested is 1.0 to 1.5 cm; the parameters of the X-direction moving servo motor screw slide module and the Z-direction moving servo motor screw slide module are set so that the nozzle moves at a speed of 2 to 6 mm / s and circulates and purges more than 3 times according to the predetermined purge route; the digital display pressure regulating device is adjusted so that the purge gas pressure is 0.5 to 0.6 MPa; the gas flow meter is set so that the purge flow rate is not less than 100 L / min; after the above parameter settings and adjustments are completed, the purge is started through the touch screen PLC until the purge work is completed; d) Constant weight: Take out the carrier from the carrier tooling and put it into a hot air drying oven at 200° C. for 2 hours, and weigh it to obtain a weight M3; e) Coating adhesion evaluation: Calculation of coating shedding rate

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