Device for detecting firmness of automobile catalyst coating layer

Abstract

The utility model discloses a firmness detection device for an automobile catalyst coating layer. The firmness detection device consists 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, a PLC 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, flows into the gas flowmeter, flows out after the flow of the compressed air is adjusted by the gas flowmeter, flows to the nozzle through the gas pipeline, flows out of the nozzle and acts on the catalyst carrier. The device can effectively detect the adhesive force of the coating of the catalyst.

Description

Technical Field

[0001] The utility model relates to a coating firmness detection device for automobile catalysts, in particular to a coating firmness detection device suitable for automobile catalysts with silicon carbide and cyclopentane cylindrical honeycomb carriers. Background Art

[0002] Automotive catalysts are made by mixing platinum / palladium / rhodium and rare earth materials into a slurry, and then applying the slurry to the honeycomb carrier pore wall through a coating device and heat treating it. The adhesion strength of the coating on the pore wall is an important factor affecting the product quality and service life of automotive catalysts. If the coating attached to the carrier pore wall falls off from the carrier pore wall because the adhesion strength does not meet the process requirements, it will directly lead to a shortened service life of the automotive catalyst and the conversion efficiency does not meet the emission regulations. For this reason, testing the adhesion strength of the coating is an important part of the automotive catalyst manufacturing process.

[0003] At present, there are many types of automotive catalysts, such as TWC, CGPF, CDPF, DOC, SCR, ASC, etc. GB / T 29914-2013 national standard and T / CAEP 136.1-2021 (Technical requirements for pollution control devices for gasoline vehicles) industry standard have clear method requirements for the coating adhesion firmness test of these catalysts, but there are no clear regulations on the technical details of how to implement the method. In the industry, various automotive catalyst manufacturers have no unified technology and types for catalyst coating adhesion firmness testing.

[0004] With the implementation of the National VI emission regulations, the coating process of automotive catalysts has become increasingly complex, placing higher requirements on the durability of the catalysts, and correspondingly placing more stringent requirements on the firmness of the catalyst coating. Therefore, how to quickly and accurately evaluate the adhesion firmness of the catalyst coating has become urgent. Utility Model Content

[0005] The technical problem to be solved by the utility model is:

[0006] Faced with the more stringent requirements of the National VI emission regulations on catalyst coating adhesion, there is an urgent need for a catalyst coating adhesion assessment device that meets the regulatory requirements to ensure that the coating adhesion firmness meets the process design requirements and factory standards, and to ensure the product's designed service life and emission compliance under the National VI emission regulations.

[0007] The technical solution adopted by the utility model to solve its technical problems is:

[0008] A device for detecting the firmness of an automobile catalyst coating layer comprises a main device, an industrial vacuum cleaner and a compressed air freeze dryer.

[0009] 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 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, a PLC controller, etc.

[0010] 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 PLC controller.

[0011] The nozzle XYZ three-direction moving mechanism is located just above the dust collection box on the left side of the lower interior 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 PLC controller. 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.

[0012] The nozzle is fixed on the moving slide of the X-axis servo motor screw slide module through a simple clamp.

[0013] 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.

[0014] 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.

[0015] When the nozzle needs to move in the Z direction, the servo motor of the Z-direction servo motor screw slide module is powered on to control the forward and reverse rotation, and the screw connected to the servo motor rotates forward and reverse synchronously. Since the screw is threadedly connected to the movable slide, the movable slide moves, and the Y-direction servo motor screw slide module fixed on the movable slide moves forward and backward as a whole. Since the X-direction servo motor screw slide module is fixed on the Y-direction servo motor screw slide module as a whole, and the nozzle is fixed on the X-direction servo motor screw slide module, the nozzle also moves in the Z direction.

[0016] When the nozzle needs to move in three directions of XYZ, the control system can simultaneously send control instructions to the servo motor of the XYZ servo motor screw slide module.

[0017] The carrier tooling is located directly above the dust collection box. It is made of an aluminum alloy plate of a certain thickness into a disc, with round holes running through the center of the disc, and a support platform inside the round hole for placing and fixing the carrier. A step is formed at the bottom of the disc to fit and fix it with the round hole on the top of the dust collection box.

[0018] The dust collection box is located at the lower left side inside the main frame, and is surrounded by a stainless steel plate of a certain thickness and the industrial aluminum alloy profile of the main frame. A circular hole is opened in the center of the top of the dust collection box for positioning the carrier tooling. The function of the dust collection box is to collect the slurry that falls off during the airflow blowing process.

[0019] The digital pressure regulating device is located on the upper right side of the main frame and is fixed to the main frame by bolts. Its function is to filter water vapor, oil vapor, dust impurities from the compressed air and purify the air. At the same time, the pressure reducing valve of the digital pressure regulating device is adjusted to provide a stable airflow working pressure for the nozzle.

[0020] The gas flow meter is located below the digital pressure regulating device and is fixed to the main frame through bolts and an aluminum alloy plate of a certain thickness, and its function is to provide the working air flow for the nozzle.

[0021] The nozzle is located above the carrier tooling, and is vertically connected to the moving slide of the X-axis moving servo motor lead screw slide module through a simple clamp and bolts, and is connected to the gas flow meter through a gas pipeline. Compressed air is sprayed out through the nozzle through the gas flow meter and the gas pipeline for purging the catalyst carrier.

[0022] The compressed air delivery pipeline is for the closed delivery of compressed air and is used to achieve the connection between the nozzle and the gas flow meter, the gas flow meter and the digital pressure regulating device, and the digital pressure regulating device and the compressed air freeze dryer outlet filter.

[0023] The PLC controller is provided with a touch screen.

[0024] The PLC controller is located on the upper right side of the outer side of the main frame and is fixed to the main frame by bolts and an aluminum alloy plate of a certain thickness.

[0025] The PLC controller cabinet is located at the lower right side inside the main frame, and is surrounded by a stainless steel plate of a certain thickness and the industrial aluminum alloy profile of the main frame. It is used for placing electrical control components, and buttons and indicator lights are placed on the external panel of the cabinet.

[0026] 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 pipe. It is used to recover the slurry that falls off during the airflow sweeping process to prevent environmental pollution and to recycle and reuse the slurry that falls off. The industrial dust collector has its own electric control system and is independently controlled by connecting to an external power supply through a cable.

[0027] The compressed air freeze dryer is located on the right side of the main device, connected to the external compressed air through the air inlet filter, and connected to the digital pressure regulating device of the main device through the air outlet filter and the pipeline. The compressed air freeze dryer must be configured and placed close to the equipment. Its functions: ① Impurity removal: The adhesion firmness test of the automobile catalyst carrier coating needs to be purged with compressed air, and the compressed air contains not only moisture but also impurities (a. from the air compressor itself: oil pollution, oil vapor generated by operation, metal powder generated by the operation of components, rubber fines, tar particles and filter material fines generated by aging of seals; b. from the compressed air delivery process: due to the long-term pressure and water vapor and oil pollution of the inner wall of the compressed air transmission pipeline, rust and fall off, which are easily attached to the inner wall of the carrier channel, causing the weight of the test carrier to change, affecting the accuracy of the test data. Therefore, it is necessary to remove impurities before entering the digital pressure regulating device to obtain clean compressed air for purging; ② Dehydration: to eliminate the adverse effect of the water-gas mixed airflow formed by the condensation effect of the compressed air on the compressed air due to the change of the external temperature (low temperature) in the transmission pipeline on the test data.

[0028] The compressed air freeze dryer has its own electronic control system, which is independently controlled by connecting to an external power supply via cables.

[0029] The working principle of the utility model device includes:

[0030] After the external compressed air is freeze-dried and impurities are removed by the compressed air freeze dryer, it enters the digital pressure regulating device to adjust the pressure and then flows into the gas flow meter. The compressed air flows out after the flow is adjusted by the gas flow meter, flows to the nozzle through the gas pipeline, and flows out from the nozzle to act on the catalyst carrier. Specifically, Figure 1As shown. ① Start the supporting device: The operator turns on the industrial vacuum cleaner and compressed air freeze dryer, and ensures that the external compressed air supply is normal. ② Adjust the parameters of the main device: The operator places the carrier to be tested vertically on the carrier tooling in the main device. According to the process requirements, adjust the digital pressure adjustment device to ensure that the purge air flow pressure meets the requirements. Adjust the gas flow meter to ensure that the purge air flow meets the requirements. Set the parameters of the XYZ three-direction servo motor screw slide module through the touch screen PLC to ensure that the distance between the nozzle and the end face of the carrier, the nozzle movement speed, the nozzle movement path and the number of purge cycles meet the requirements. ③ Test start: After the parameters of the main device are set, the operation of the main device can be started to complete the catalyst slurry adhesion test. During the test, the industrial vacuum cleaner captures the slurry dust that falls off the catalyst carrier due to the air flow purge through negative pressure, and the compressed air freeze dryer continuously freezes and removes impurities from the external compressed air to ensure that the nozzle purge air flow is dry and clean.

[0031] The beneficial effects of the utility model include:

[0032] 1. Established enterprise-owned standards for the equipment and application of automobile catalyst coating adhesion testing;

[0033] 2. This self-use standard has been audited and approved by the leading domestic mainstream car manufacturers, providing a good application example for the promotion of this standard in the industry;

[0034] 3. The utility model has the advantages of high reliability, convenient maintenance, and is applicable to a wide variety of catalyst carrier types and specifications. It is an ideal device for detecting the adhesion of silicon carbide / cordierite honeycomb National VI automobile catalyst coating. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0036] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0037] Figure 2 It is a front view of the utility model;

[0038] Figure 3 It is a top view of the utility model;

[0039] Figure 4 It is a left side view of the utility model;

[0040] Figure 5 1 is a view of a carrier tooling of the utility model, wherein (a) is an axonometric view, (b) is a top view, (c) is a cross-sectional view, and (d) is a front view;

[0041] Figure 6 It is a top view schematic diagram of the nozzle purge path of the utility model.

[0042] The reference numerals in the figure are:

[0043] 0-catalyst carrier, 1-main device, 2-industrial vacuum cleaner, 3-compressed air freeze dryer;

[0044] X-nozzle X movement direction, Z-nozzle Z movement direction;

[0045] 00-catalyst carrier end face, 10-main frame, 11-nozzle XYZ three-direction moving mechanism, 12-carrier tooling, 13-dust collection box, 14-digital pressure regulating device, 15-gas flow meter, 16-PLC controller, 17-nozzle, 18-gas pipeline;

[0046] 21-dust collection pipe; 31-compressed air dryer air inlet filter, 32-compressed air dryer air outlet filter;

[0047] 160-touch screen PLC, 161-PLC controller cabinet;

[0048] 171-the starting position when the nozzle purge times are odd or the ending position when the nozzle purge times are even, 172-the starting position when the nozzle purge times are even or the ending position when the nozzle purge times are odd;

[0049] 181-gas flow meter outlet pipe, 182-compressed air dryer outlet pipe;

[0050] 310 - compressed air cold dryer air inlet filter 31 air inlet;

[0051] 1110 - X-axis moving servo motor lead screw slide module, 1120, 1121 - Y-axis moving servo motor lead screw slide module symmetrically arranged, 1130, 1131 - Z-axis moving servo motor lead screw slide module symmetrically arranged. DETAILED DESCRIPTION

[0052] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only an embodiment of a part of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of the utility model.

[0053] In one embodiment of the present invention, a device for detecting the firmness of a catalyst coating layer of an automobile is provided. Figures 1 to 4, which is used to detect the adhesion firmness of honeycomb cylindrical automobile catalyst slurry.

[0054] like Figure 1 As shown, a coating type catalyst coating firmness detection device is composed of a main device 1, an industrial vacuum cleaner 2, and a compressed air freeze dryer 3.

[0055] The main device 1 is located in the middle of the device of the utility model, with an industrial vacuum cleaner 2 on its left side connected via a dust collecting pipe 21 , and a compressed air freeze dryer 3 on its right side connected via a gas flow meter inlet pipe 182 .

[0056] The main device 1 is composed of a main 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, a PLC controller 16, a nozzle 17, and a gas pipeline 18. 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.

[0057] The main frame 10 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 11, the carrier tooling 12, the dust collection box 13, the digital pressure regulating device 14, the gas flow meter 15, the PLC controller 16, the nozzle 17, and the gas pipeline 18.

[0058] The nozzle XYZ three-direction moving mechanism 11 is located directly above the dust collection box 13 on the left side of the lower part of the main frame 10, and is responsible for the XYZ three-direction movement of the nozzle 17. It is composed of an X-direction moving servo motor screw slide module 1110, a Y-direction moving servo motor screw slide module 1120, 1121, and a Z-direction moving servo motor screw slide module 1130, 1131. Specifically, 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 the base of the Z-direction moving servo motor screw slide module 1130, 1131 is fastened to the top surface of the dust collection box 13 by bolt connection. The Y-direction moving servo motor screw slide modules 1120 and 1121 are located above the Z-direction moving servo motor screw slide modules 1130 and 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 modules 1120 and 1121. The nozzle 17 is mounted and fixed on the moving slide of the X-direction moving servo motor screw slide module 1110 by a simple clamp. 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 mounted and fixed on the moving slide also moves left and right in the X direction. When the moving slides of the Y-direction moving servo motor screw slide modules 1120 and 1121 move 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. When the moving slides of the Z-direction moving servo motor screw slide modules 1130 and 1131 move forward and backward in the Z direction, the Y-direction moving servo motor screw slide modules 1120 and 1121 fixed on the moving slide also move forward and backward in the Z direction. The movement of the nozzle 17 in the three directions of X, Y and Z is realized by the combination of the moving slides on the servo motor screw slide modules moving in each direction.

[0059] The carrier tooling 12 is located directly above the dust collection box 13. Specifically, Figure 5 As shown, a disc is made of an aluminum alloy sheet of a certain thickness, and a circular hole is opened in the center of the disc. A support platform is formed inside the circular hole for placing and fixing the carrier. A step is formed at the bottom of the disc for fitting and fixing with the circular hole on the top of the dust collection box 13.

[0060] The dust collection box 13 is located at the lower left side of the main frame 10 and is surrounded by a stainless steel plate of a certain thickness and the industrial aluminum alloy profile of 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.

[0061] The digital pressure regulating device 14 is located on the upper right side of the main frame 10 and is fixed to the main frame 10 by bolts. Its function is to filter water vapor, oil vapor, dust impurities from the compressed air and purify the air. At the same time, through the adjustment of the pressure reducing valve, a stable airflow working pressure is provided for the nozzle.

[0062] The gas flow meter 15 is located below the digital pressure regulating device 14 and is fixed to the main frame 10 by bolts and an aluminum alloy plate of a certain thickness. Its function is to provide a stable air flow rate for the nozzle.

[0063] The PLC controller 16 automatic touch screen is used for the operation control of the main device 1. The touch screen is located on the upper right side of the outer side of the main frame 10, fixed to the main frame 10 by bolts and aluminum alloy plates of a certain thickness, and electrically connected to the electrical components in the cabinet 161 of the PLC controller 16. The cabinet 161 of the PLC controller 16 is located at the lower right side of the inside of the main frame, surrounded by a stainless steel plate of a certain thickness and the industrial aluminum alloy profile of the main frame, and is used for the placement of electrical control components. Buttons and indicator lights are placed on the external panel of the cabinet. The PLC controller 16 can adjust the Y-direction moving servo motor screw slide module 1120, 1121 to move up and down in the Y direction according to the set parameters to ensure the distance between the nozzle 17 and the upper end face of the catalyst carrier to be detected; set parameters for the X-direction moving servo motor screw slide module 1110 and the Z-direction moving servo motor screw slide module 1130, 1131 to ensure that the nozzle 17 is purged according to the set moving speed, purging path and number of cyclic purging times.

[0064] The nozzle 17 is located above the carrier fixture 12, and is a stainless steel round tube of a certain length and diameter, which is fixed to the moving slide of the X-axis moving servo motor screw slide module 1110 by simple clamps and bolts, and the round tube is vertically connected to the carrier fixture 12. The upward end of the round tube is connected to the gas flow meter outlet pipe 181, and the downward end faces the carrier end surface.

[0065] The external compressed air enters the compressed air freeze dryer 3 through the compressed air dryer air inlet filter 31 which is a component of the compressed air freeze dryer 3. After freeze drying and impurity removal, the compressed air flows out from the compressed air dryer air outlet filter 32, flows to the digital display pressure regulating device 14 through the compressed air dryer air outlet pipe 182, and further flows to the gas flow meter 15, flows out from the air outlet of the gas flow meter 15, and flows to the nozzle 17 through the gas flow meter air outlet pipe 181, and finally flows out from the lower pipe mouth of the circular tube of the nozzle 17 to act on the catalyst carrier.

[0066] The gas pipeline 18 is composed of a gas flow meter outlet pipe 181 and a compressed air dryer outlet pipe 182, and its function is to transport compressed air in a closed manner. 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 flow meter 15 outlet, and the other end of the pipe is connected to the nozzle 17, and the pipe material is polyurethane. The compressed air dryer outlet pipe 182 is located between the compressed air dryer outlet filter 32 and the digital pressure regulating device 14, one end of the pipe is connected to the air inlet of the digital pressure regulating device 14, and the other end of the pipe is connected to the outlet of the compressed air dryer outlet filter 32, and the pipe material is stainless steel.

[0067] The industrial vacuum cleaner 2 is located on the left side of the main device 1 and is connected to the dust collection box 13 through the dust collection pipe 21. It is used to recover the slurry that falls off during the airflow sweeping process to prevent environmental pollution and to recycle the slurry that falls off. The industrial dust collector 2 has its own electric control system and is independently controlled by connecting to an external power source through a cable.

[0068] The compressed air freeze dryer 3 is placed near the right side of the main device 1, and is connected to the external compressed air through the air inlet 310 of the compressed air dryer air inlet filter 31, and the compressed air dryer air outlet filter 32 is connected to the inlet of the digital pressure regulating device 14 through the compressed air dryer air outlet pipe 182, so as to separate the moisture in the compressed air and filter the impurities through the gas filter to obtain dry and clean compressed air for purging. The compressed air freeze dryer 3 has its own electronic control system, which is independently controlled by connecting to an external power supply through a cable.

[0069] The PLC controller 16 used in the utility model can be purchased from the market, such as SIEMENS ST-X00 series, etc., and can be configured with a built-in touch screen. The PLC controller 16 has its own data communication port and I / O interfaces such as DI / DO, AI / AO, and the configuration function provided by the manufacturer to realize the X-direction movement of the servo motor screw slide module (to achieve nozzle purging, such as Figure 6 The horizontal left and right movement shown in the figure), the Y-direction moving servo motor screw slide module set symmetrically on the left and right (to achieve the distance setting between the nozzle and the upper end surface of the carrier when the nozzle is purged), and the Z-direction moving servo motor screw slide module set symmetrically on the left and right (to achieve the distance setting between the nozzle and the upper end surface of the carrier when the nozzle is purged) Figure 6 The start and stop, forward and reverse rotation and other logical controls of the up and down step movement (as shown) and the configuration of parameter settings, purge start and stop buttons and other human-machine interfaces in the touch screen do not require programming in the traditional sense to realize these functions, nor does it involve computer programs for realizing methods unknown to those skilled in the art.

[0070] The detection method of the utility model and the effectiveness of the detection results are further described below with reference to the accompanying drawings and attached tables through embodiments.

[0071] The catalysts used in the experiment were selected from the company's own catalysts, including TWC, DOC, SCR, ASC, etc., which were numbered T-1, T-2, D-1, D-2, S-1, S-2, A-1, A-2 respectively.

[0072] Example 1

[0073] Catalyst product T-1 was selected, and the product information was: TWC product, specification 118.41 (D) * 127 (H), 750 / 2.5, coating loading 150 g / L.

[0074] a. Obtain product coating quality information M1 based on product preparation information;

[0075] b. Constant weight: Select catalytic converter A-1, dry it at 200°C for 2 hours, and weigh it to obtain the weight M2;

[0076] c. Purging: The operator places the catalyst carrier to be tested into the carrier fixture 12, and adjusts the moving slides of the Y-direction moving servo motor screw slide modules 1120 and 1121 in the Y direction up and down through the touch screen of the PLC controller 160 and the PLC controller 16, ensuring that the distance between the nozzle 17 and the upper end surface of the catalyst carrier to be tested is 1.0 to 1.5 cm; set the parameters of the X-direction moving servo motor screw slide module 1110 and the Z-direction moving servo motor screw slide module 1130 and 1131 to ensure that the nozzle 17 is purged at least 3 times at a moving speed of 4 mm / s and according to the predetermined moving path (in compliance with T / CAEP 136.1-2021 Technical Requirements for Gasoline Vehicle Pollution Control Devices-5.3.7.3). Adjust the digital pressure regulating device 14 to ensure that the purge air pressure is between 0.5 and 0.6 MPa. Set the gas flowmeter 15 to ensure that the purge flow is not less than 100 L / min. After the above parameter settings are adjusted, the purge is started by manually selecting a start button set on the touch screen of the PLC controller 160.

[0077] Purge path Figure 6 As shown, the circle is divided into several horizontal strips with equal spacing, the length of the horizontal strip is the carrier diameter, and the width is not greater than the diameter of the nozzle tube.

[0078] The first purge route is: the nozzle 17 starts from the right edge position 171 at the bottom of the carrier, and moves horizontally from right to left in the nozzle X moving direction. When the moving distance reaches the left edge, the nozzle 17 moves one step from bottom to top in the nozzle Z moving direction, and the moving step is 4 mm (the diameter of the nozzle tube is 4 mm). After moving into place, the nozzle 17 moves horizontally from left to right in the nozzle X moving direction. When the moving distance reaches the right edge of the carrier, the nozzle 17 moves one step from bottom to top in the nozzle Z moving direction. After moving into place, the nozzle 17 repeats the movement from right to left in the X horizontal direction... Repeat the above actions until the cumulative moving distance of the nozzle 17 in the Z moving direction reaches the carrier diameter and is at the right edge position 172 at the top of the nozzle, the first purge is completed.

[0079] The second purge route is the reverse route of the first purge route; the third purge action is the same as the first purge action; the fourth purge action is the same as the second purge action. And so on, until the set purge times are reached, the work is finished;

[0080] d. Constant weight: After the purging work is completed, the operator takes out the carrier from the carrier tooling 12 and puts it into a hot air drying oven to dry it at 200° C. for 2 hours, and weighs it to obtain a weight M3;

[0081] e. Coating adhesion evaluation:

[0082] Example 2

[0083] The catalyst product T-2 was selected, and the product information was: TWC product, specification 132.1 (D) * 101.6 (H), 400 / 4.5, coating loading 240g / L.

[0084] The operation was carried out according to steps a to e in Example 1.

[0085] Example 3

[0086] Catalyst product D-1 was selected, and the product information was: DOC product, specification was 190.5(D)*76.2(H), 400 / 4.5, and coating loading was 90g / L.

[0087] The operation was carried out according to steps a to e in Example 1.

[0088] Example 4

[0089] Catalyst product D-2 was selected, and the product information was: DOC product, specification 143.8 (D) * 160 (H), 600 / 4.5, coating loading 120 g / L.

[0090] The operation was carried out according to steps a to e in Example 1.

[0091] Example 5

[0092] The catalyst product S-1 was selected, and the product information was: SCR product, specification 266.7(D)*152.4(H), 400 / 4.5, coating loading 120g / L.

[0093] The operation was carried out according to steps a to e in Example 1.

[0094] Example 6

[0095] The catalyst product S-2 was selected, and the product information was: SCR product, specification 228.6 (D) * 127 (H), 600 / 4.5, coating loading 190 g / L.

[0096] The operation was carried out according to steps a to e in Example 1.

[0097] Example 7

[0098] Catalyst product A-1 was selected, and the product information was: SCR product, specification 266.7(D)*101.6(H), 400 / 4.5, coating loading 90g / L.

[0099] The operation was carried out according to steps a to e in Example 1.

[0100] Example 8

[0101] Catalyst product 1-2 was selected, and the product information was: SCR product, specification was 228.6(D)*76.2(H), 600 / 4.5, and coating loading was 180g / L.

[0102] The operation was carried out according to steps a to e in Example 1.

[0103] The coating shedding rate test results in Examples 1-8 are shown in Table 1.

[0104] Table 1 Catalytic converter coating shedding rate results

[0105] serial number Catalyst No. 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％

[0106] It can be seen from Table 1 above that the detection method of the embodiment can effectively identify the coating adhesion of the catalyst and provide a fast and accurate detection means for the product.

[0107] Comparative Example 1

[0108] The effectiveness of the test results is demonstrated by using the catalyst A-1 (gasoline engine product) of Example 1 above to perform bench aging. The steps are as follows:

[0109] ① Take the catalyst carrier of Example 1 and use the device and detection method to obtain the catalyst carrier weight M2 and the coating load weight M1;

[0110] ② Use the gasoline engine bench system for rapid aging (one of the common aging methods in the industry, General Motors' four-stage aging cycle - GMAC875, i.e. aging for 200 hours). After the aging is completed, weigh the carrier and record the weight data M3;

[0111] ③ Coating adhesion evaluation:

[0112] Comparative Example 2

[0113] The effectiveness of the test results is demonstrated by using the catalyst D-1 (diesel engine product) of Example 3 above to perform bench aging. The steps are as follows:

[0114] ① Take the catalyst carrier of Example 3 and use the device and detection method to obtain the catalyst carrier weight M2 and the coating load weight M1;

[0115] ② Use the diesel engine bench system to age the fuel injection catalyst (the method used by leading companies in the industry to examine catalyst durability), and the aging time is 100 hours. After the aging is completed, weigh the carrier and record the weight data M3;

[0116] ③ Coating adhesion evaluation:

[0117] Table 2 Comparison of catalytic converter coating shedding rate

[0118] serial number Catalyst No. Dropout rate Comparative Example 1 A-1 1.5％ Comparative Example 2 D-1 4.3％

[0119] It can be seen from Table 2 above that the difference between the coating shedding rate tested by the utility model device and method and the coating shedding rate after the bench aging test is within 2.2% (the coating shedding rate of the catalyst in the current industry is controlled within 5%), indicating that the test results of the utility model device and method can accurately reflect the firm state of the coating of the catalyst during actual use, and the evaluation results are credible.

Claims

1. A device for detecting the firmness of a catalyst coating layer of an automobile, 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 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), a PLC controller (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 PLC controller (16), and is controlled by the PLC controller (17). 6) controlling 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.

2. The device for detecting the firmness of a catalyst coating layer of an automobile according to claim 1, 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 device for detecting the firmness of a catalyst coating layer of an automobile according to claim 2, 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 device for detecting the firmness of a catalyst coating layer of an automobile according to claim 1, 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 device for detecting the firmness of a catalyst coating layer of an automobile according to claim 4, 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 device for detecting the firmness of a catalyst coating layer of an automobile according to claim 1, 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. A device for detecting the firmness of an automobile catalyst coating layer according to any one of claims 1 to 6, 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).

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