Automobile catalyst carrier coating equipment

Abstract

The invention relates to the technical field of catalytic converter carrier coating, and particularly discloses automobile catalytic converter carrier coating equipment which comprises a bottom plate; the slurry tank is arranged on the bottom plate; the stirring mechanism comprises a power part arranged outside the slurry tank, a turntable arranged at the top of the slurry tank and driven by the power part, and a stirring shaft which is in spline connection with the turntable and extends into the slurry tank; the bottom connecting piece is arranged on the bottom plate, and a bottom groove which can contain an automobile catalyst carrier and is communicated with the slurry tank is formed in the bottom connecting piece; the air cylinder is arranged on the bottom plate, a piston rod of the air cylinder is vertically upward and is provided with a top connecting piece corresponding to the bottom connecting piece and a stirring shaft connecting frame connected with the stirring shaft, and the top connecting piece is provided with a top groove corresponding to the bottom groove; and the negative pressure pump is communicated with the top groove, so that the problems that the slurry is not uniformly mixed and the cost of the whole automobile catalyst carrier coating process is increased due to the lack of longitudinal stirring and mixing of the slurry in the traditional automobile catalyst carrier coating equipment are solved.

Description

Technical Field

[0001] The present application relates to the technical field of catalyst carrier coating, and specifically discloses an automobile catalyst carrier coating device. Background Art

[0002] Automotive catalyst carrier coating involves evenly depositing a slurry containing catalytically active ingredients onto the surface and inner pore walls of a catalyst carrier (such as a honeycomb ceramic or metal carrier). Typically, this process involves negative pressure coating, immersion coating, spray coating, or spin coating.

[0003] Taking negative pressure coating as an example, its basic principle is to fix the two ends of the catalyst carrier and seal the circumference through sealed connectors. The two ends of the connector are connected to the slurry tank or negative pressure pump. The power of the negative pressure pump is used to suck the slurry from the slurry tank into the carrier pores, thereby achieving the purpose of coating the catalyst carrier. Negative pressure coating can ensure uniform coating and reduce the risk of clogging.

[0004] Although the slurry tank is usually equipped with a stirring device, the conventional stirring device can only stir the slurry in the plane, and lacks the longitudinal stirring and mixing of the slurry. The slurry is rich in precious metals or rare earth materials such as platinum, palladium, and rhodium, and is prone to stratification to varying degrees. It is difficult to completely mix the slurry by only stirring in the plane, resulting in varying degrees of quality differences in the coated catalyst carrier, increasing the cost and time of subsequent rework, and also increasing the cost of the entire process of coating the automobile catalyst carrier. Therefore, in view of this, the present invention provides an automobile catalyst carrier coating device to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to solve the problem that conventional automobile catalyst carrier coating equipment lacks a device for longitudinally stirring and mixing the slurry, resulting in uneven slurry mixing and increasing the cost of the entire automobile catalyst carrier coating process.

[0006] In order to achieve the above-mentioned object, the basic solution of the present invention provides an automotive catalyst carrier coating device, comprising: base plate; A slurry tank located on the bottom plate; The stirring mechanism includes a power member provided outside the slurry tank, a turntable provided on the top of the slurry tank and driven by the power member, and a stirring shaft spline-connected to the turntable and extending into the slurry tank; A bottom connecting piece is provided on the bottom plate, wherein the bottom connecting piece is provided with a bottom tank for accommodating the automobile catalyst carrier and communicating with the slurry tank; A cylinder is provided on the bottom plate, the piston rod of the cylinder is vertically upward and is provided with a top connecting piece corresponding to the bottom connecting piece and a stirring shaft bracket connected to the stirring shaft, and the top connecting piece is provided with a top groove corresponding to the bottom groove; A negative pressure pump is connected to the top tank.

[0007] The principles and effects of this basic solution are: Compared with the prior art, the present invention utilizes the movement process in which the top connecting piece or the bottom connecting piece needs to be close to or away from each other during the coating process of the automobile catalyst carrier to seal, clamp or release the automobile catalyst carrier, so that the cylinder drives the top connecting piece to move vertically while also driving the stirring shaft to move vertically through the stirring shaft bracket, so that the stirring shaft, driven by the power piece, stirs the slurry in the slurry tank in a plane while also stirring the slurry vertically, effectively avoiding stratification of the slurry in the stirring tank, thereby avoiding quality differences in the catalyst carrier after coating, thereby reducing the cost and time of subsequent rework, that is, reducing the cost of the entire process of coating the automobile catalyst carrier.

[0008] Furthermore, a limit plate is provided on the top of the mixing tank, and a limit slot is provided in the limit plate, and the turntable is rotatably connected in the limit slot. The limit plate and the limit slot can effectively limit the rotation of the turntable to prevent the turntable from generating vertical movement or jumping that affects the normal transmission process.

[0009] Furthermore, the stirring mechanism also includes a planetary gear transmission pair located within the slurry tank. The stirring shaft extends into the slurry tank and is connected to the sun gear of the planetary gear transmission pair. A main stirring rod is provided, and each of the planetary gears in the planetary gear transmission pair is connected to a secondary stirring rod. Utilizing the transmission characteristics of the planetary gear transmission pair, the main stirring rod and multiple secondary stirring rods simultaneously stir the slurry in the slurry tank, thereby improving the stirring and mixing effect of the slurry.

[0010] Furthermore, the planetary gears of the planetary gear transmission pair are each equipped with a telescopic rod connected to the top of the slurry tank. The ring gear of the planetary gear transmission pair is rotatably connected to the inner wall of the slurry tank and is equipped with a plurality of scrapers that scrape along the inner wall of the slurry tank. This arrangement allows the planetary gears to rotate only in place, and a stable gap exists between adjacent planetary gears, allowing the feed pipe to pass through the gap to replenish the slurry in the slurry tank. At the same time, the ring gear rotates within the slurry tank, driving the scrapers to scrape the slurry from the inner wall of the slurry tank, preventing the slurry from adhering to the inner wall of the slurry tank and causing uneven mixing.

[0011] Furthermore, the inner wall of the slurry tank is provided with a limiting ring that fits with the upper and lower surfaces of the ring gear in the planetary gear transmission pair to prevent the position of the ring gear from deviating and affecting the normal transmission process.

[0012] Furthermore, a planetary gear bracket is provided between the sun gear and the planetary gears in the planetary gear pair. The telescopic rod includes a fixed shaft connected to the top of the slurry tank and a sliding sleeve slidably connected to the fixed shaft and connected to the planetary gears. The sliding sleeve is rotatably connected to the planetary gear bracket to limit and guide the rotation of the planetary gears.

[0013] Furthermore, the main stirring rod and the auxiliary stirring rod are provided with a plurality of vertically staggered stirring blades to further improve the stirring and mixing effect of the slurry.

[0014] Furthermore, the bottom connector includes a base mounted on the bottom plate, a connecting base mounted on the base, and a mounting base mounted on the connecting base. The bottom trough is disposed within the mounting base. The connecting base and the base define a cavity connected to the bottom trough. A feed pipe is provided between the cavity and the slurry tank. The base is provided with a plurality of guide vanes extending from the end of the feed pipe toward the interior of the connecting base. The top of the connecting base and its inner wall form a table surface for placing the automotive catalyst substrate. The guide vanes ensure that the slurry is more evenly distributed within the bottom trough when adsorbed, thereby more evenly coating the inner wall of the pores of the automotive catalyst substrate.

[0015] Furthermore, the invention further comprises a sleeve connected to the feed pipe, wherein a piston is slidably and sealingly connected within the sleeve and can seal the feed pipe, one end of the piston is slidably connected within the sleeve, and an airbag and a return spring are provided between the end and the inner wall of the sleeve, and the airbag is connected to the negative pressure pump. In this manner, when the negative pressure pump is turned on, the gas within the airbag is adsorbed, causing the airbag to shrink and drive the piston to move, thereby releasing the seal on the feed pipe. When the negative pressure pump is turned off, the elastic potential energy of the return spring causes the piston to move in the opposite direction, and the piston seals the feed pipe. Thus, the feed pipe can be automatically controlled to be open when the negative pressure pump is turned on (i.e., when slurry supply is required), and automatically controlled to be blocked when the negative pressure pump is turned off (i.e., when slurry supply is not required).

[0016] Furthermore, the bottom connector also includes a sealing sleeve provided on the top or inner wall of the mounting seat to improve the sealing performance between the mounting seat and the automobile catalyst substrate, thereby preventing the slurry from being discharged from the gap between the mounting seat and the automobile catalyst substrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A schematic diagram of the structure of one side of an automobile catalyst carrier coating device proposed in an embodiment of the present application is shown; Figure 2 The other side of the structural schematic diagram of an automobile catalyst carrier coating device proposed in an embodiment of the present application is shown; Figure 3 A schematic diagram of the connection of a planetary gear transmission pair in an automotive catalyst carrier coating device proposed in an embodiment of the present application is shown; Figure 4 A cross-sectional view of a bottom connecting piece in a coating device for an automotive catalyst carrier proposed in an embodiment of the present application is shown; Figure 5 A schematic diagram of the interior of a sleeve in an automobile catalyst carrier coating device proposed in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0019] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0020] The figure marks in the drawings of the specification include: bottom plate 1, slurry tank 2, bottom connecting part 3, base 301, connecting seat 302, mounting seat 303, sealing sleeve 304, guide vane 305, top connecting part 4, cylinder 5, top connecting part bracket 6, stirring shaft bracket 7, motor 8, belt 9, turntable 10, limit plate 11, negative pressure pump 12, discharge pipe 13, negative pressure branch pipe 14, stirring shaft 15, ring gear 16, limit ring 17, fixed shaft 18, sliding sleeve 19, sun gear 20, planetary gear 21, main stirring rod 22, auxiliary stirring rod 23, scraper 24, feed pipe 25, piston 26, sleeve 27, airbag 28, return spring 29.

[0021] An automobile catalyst carrier coating device, for example Figure 1 and Figure 2 As shown, it includes a base plate 1, a slurry tank 2 arranged on the base plate 1, a stirring mechanism for stirring the slurry in the slurry tank 2, a bottom connecting piece 3 arranged on the base plate 1 and accommodating the automobile catalyst carrier, a top connecting piece 4 located directly above the bottom connecting piece 3 and clamping the top of the automobile catalyst carrier, and a cylinder 5 arranged on the base plate 1 and used to drive the top connecting piece 4 to move vertically.

[0022] The bottom plate 1 is the floor of the automobile catalyst carrier coating station or a work surface fixed to the floor by bolts, pillars, etc.

[0023] The slurry tank 2 is provided with a feeding pipe, a liquid level gauge for detecting the liquid level height in the slurry tank 2 and an exhaust hole for allowing the gas in the slurry tank 2 to be discharged.

[0024] like Figures 1 to 3As shown, the stirring mechanism includes a motor 8 arranged outside the slurry tank 2, a turntable 10 arranged at the top of the slurry tank 2 and connected to the output shaft of the motor 8 by a belt drive, a stirring shaft 15 splined to the turntable 10 and extending into the slurry tank 2, and a planetary gear transmission pair arranged in the slurry tank 2 and driven by the stirring shaft 15. Among them, a driving pulley is provided on the rear of the output shaft of the motor 8, a belt 9 groove is provided at the circumference of the turntable 10, and the belt 9 is stretched between the driving pulley and the belt 9 groove. In order to prevent the turntable 10 from generating vertical movement or jumping and affecting the normal transmission process, a first limit plate 11 and a second limit plate 11 are also provided on the top of the stirring tank. The first limit plate 11 and the second limit plate 11 are both provided with a limit groove on the side close to the turntable 10. The end of the turntable 10 is rotatably connected in the limit groove. A gap is formed between the first limit plate 11 and the second limit plate 11 to allow the belt 9 to pass through.

[0025] A spline groove is provided on the outer wall of the stirring shaft 15 , and a matching hole for allowing the stirring shaft 15 to pass through is provided inside the turntable 10 , and a connecting key adapted to the spline groove is provided in the matching hole.

[0026] like Figure 3 As shown, the planetary gear transmission pair includes a ring gear 16 rotatably connected to the inner wall of the slurry tank 2, three planetary gears 21 meshing with the ring gear 16 and rotating in place, and a sun gear 20 provided on the agitator shaft 15 and meshing with the planetary gears 21. Specifically, the inner wall of the slurry tank 2 is provided with a limit ring 17 that fits the upper and lower surfaces of the ring gear 16 to substantially limit the rotational position of the ring gear 16 and prevent the position of the ring gear 16 from deviating and affecting the normal transmission process; a planetary gear 21 bracket is provided between the sun gear 20 and the planetary gear 21, and the driving wheel and the planetary gear 21 are both rotatably connected to the planetary gear 21 bracket. A telescopic rod is provided between the planetary gear 21 and the top of the slurry tank 2, and the telescopic rod includes a fixed shaft connected to the top of the slurry tank 2 and a sliding sleeve 19 rotatably and slidably connected to the fixed shaft. The sliding sleeve 19 is rotatably connected to the planetary gear 21 bracket, and the wheel axle of the planetary gear 21 extends into the interior of the sliding sleeve 19 and is fixedly connected to the sliding sleeve 19 via the key connection. This arrangement allows the planetary gears 21 to only rotate in place, with a stable gap between adjacent planetary gears 21. The feed pipe passes through the gap and extends under the planetary gear transmission pair to prevent the supplied slurry from adhering to the planetary gear transmission pair or other structural components.

[0027] The sun gear 20 is connected to the main stirring rod 22, and the planetary gears 21 are connected to the auxiliary stirring rod 23. The main stirring rod 22 and the auxiliary stirring rod 23 are provided with a number of vertically staggered stirring blades. The outer end of the bottom of the ring gear 16 cooperates with the limit ring 17, and the inner end of the bottom of the ring gear 16 is provided with a number of scrapers 24 along the inner wall of the slurry tank 2 through the connecting column. The tooth width of the ring gear 16, the planetary gear 21 and the sun gear 20 are all greater than 2 times the vertical movement stroke of the top connecting member 4 to prevent the planetary gear 21 and the sun gear 20 from detaching from the ring gear 16 during the vertical movement.

[0028] Two cylinders 5 are symmetrically arranged on the base plate 1. The pistons 26 of the cylinders 5 point vertically upward and are connected to the top connector 4 via the top connector bracket 6 and to the agitator shaft 15 via the agitator shaft bracket 7, thereby driving the top connector 4 and the agitator shaft 15 to move vertically. The bottom connector 3 is connected to the slurry tank 2 via the feed pipe 25. The top connector 4 is connected to the negative pressure pump 12 via the discharge pipe 13. The output end of the negative pressure pump 12 is connected to a recovery pipe, which passes through the gap between the planetary gears and extends under the planetary gear transmission pair.

[0029] The bottom connecting member 3 and the top connecting member 4 are symmetrical in structure. Figure 4 As shown, the bottom connector 3 includes a base 301 provided on the bottom plate 1, a connecting seat 302 provided on the base 301, and a mounting seat 303 provided on the connecting seat 302. The bottom connector 3 and the top connector 4 are respectively provided with a bottom groove and a top groove adapted for the automotive catalyst substrate, and are equipped with a sealing sleeve 304 clamped to the top of the mounting seat 303 by a clamp or embedded in the inner wall of the bottom groove and the top groove. The top of the connecting seat 302 and the inner wall of the connecting seat 302 form a table for placing the automotive catalyst substrate. The feed pipe 25 or the discharge pipe 13 is connected to the side wall of the base 301. The connecting seat 302 and the base 301 are provided with a cavity connecting the feed pipe 25 or the discharge pipe 13 with the bottom groove or the top groove, and are provided with a guide vane 305 with the end of the feed pipe 25 or the discharge pipe 13 facing the interior of the connecting seat 302.

[0030] like Figure 5As shown, the feed pipe 25 is provided with a sleeve 27 that covers and separates the feed pipe 25, and through holes that are compatible with the feed pipe 25 are symmetrically provided at both ends of the sleeve 27. A piston 26 that can seal the feed pipe 25 is slidably and sealedly connected inside the sleeve 27. One end of the piston 26 is provided with a concave surface that is compatible with the feed pipe 25, and the other end of the piston 26 is slidably connected in the sleeve 27 and an airbag 28 and a return spring 29 are provided between the inner wall of the sleeve 27. The airbag 28 is connected to the negative pressure pump 12 or the discharge pipe 13 through the negative pressure branch pipe 14. When the negative pressure pump 12 is turned on, the gas in the airbag 28 is adsorbed, causing the airbag 28 to shrink and drive the piston 26 to move, thereby releasing the seal on the feed pipe 25. When the negative pressure pump 12 is turned off, the elastic potential energy of the return spring 29 causes the piston 26 to move in the opposite direction, and the piston 26 seals the feed pipe 25. Therefore, when the negative pressure pump 12 is turned on (that is, when slurry supply is required), the feed pipe 25 is automatically controlled to be conductive, and when the negative pressure pump 12 is turned off (that is, when slurry supply is not required), the feed pipe 25 is automatically controlled to be blocked.

[0031] The discharge pipe 13 and the negative pressure branch pipe 14 are both made of soft pipes or corrugated pipes of adjustable length. The liquid level meter detects the slurry liquid level in the slurry tank 2 to prevent the slurry liquid level from being higher than the planetary gear transmission pair.

[0032] In this embodiment, after the staff manually places the automobile catalyst carrier on the bottom groove, the cylinder 5 drives the top connecting piece 4 to move downward, so that the top of the automobile catalyst carrier is stuck in the top groove, and the top side wall end face and the bottom side wall end face of the automobile catalyst carrier are sealed using the sealing sleeve 304. Then the negative pressure pump 12 can be started, and the power of the negative pressure pump 12 is used to make the feed pipe 25 conductive, and the slurry is sucked from the slurry tank 2 into the automobile catalyst carrier channel to coat the inner wall of the channel of the automobile catalyst carrier. After the coating is completed, the negative pressure pump 12 is turned off, and the elastic potential energy of the return spring 29 causes the piston 26 to seal the feed pipe 25. At the same time, the cylinder 5 drives the top connecting piece 4 to move upward, releasing the automobile catalyst carrier, and the staff can remove the automobile catalyst carrier and carry out subsequent processing technology; in this process, the cylinder 5 drives the top connecting piece 4 to move vertically while also driving the stirring shaft 15 to move vertically through the stirring shaft bracket 7, so that the stirring shaft 15, driven by the power part, stirs the slurry in the slurry tank 2 in the plane while also stirring the slurry vertically, effectively avoiding the stratification of the slurry in the stirring tank, thereby avoiding quality differences in the catalyst carrier after coating, so as to reduce the cost and time of subsequent rework, that is, reduce the cost of the entire process of coating the automobile catalyst carrier.

[0033] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any indirect modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An automotive catalyst carrier coating device, characterized in that: include: base plate; A slurry tank located on the bottom plate; The stirring mechanism includes a power member provided outside the slurry tank, a turntable provided on the top of the slurry tank and driven by the power member, and a stirring shaft spline-connected to the turntable and extending into the slurry tank; A bottom connecting piece is provided on the bottom plate, wherein the bottom connecting piece is provided with a bottom tank for accommodating the automobile catalyst carrier and communicating with the slurry tank; A cylinder is provided on the bottom plate, the piston rod of the cylinder is vertically upward and is provided with a top connecting piece corresponding to the bottom connecting piece and a stirring shaft bracket connected to the stirring shaft, and the top connecting piece is provided with a top groove corresponding to the bottom groove; A negative pressure pump is connected to the top tank.

2. The automotive catalyst carrier coating device according to claim 1, characterized in that: A limiting plate is further provided on the top of the mixing tank, a limiting groove is provided in the limiting plate, and the turntable is rotatably connected in the limiting groove.

3. The automotive catalyst carrier coating device according to claim 1, characterized in that: The stirring mechanism also includes a planetary gear transmission pair arranged in the slurry tank. The stirring shaft extends into the slurry tank and is connected to the sun gear of the planetary gear transmission pair and is provided with a main stirring rod. The planetary gears in the planetary gear transmission pair are all connected to auxiliary stirring rods.

4. The automotive catalyst carrier coating device according to claim 3, characterized in that: The planetary wheels of the planetary gear transmission pair are each provided with a telescopic rod connected to the top of the slurry tank. The gear ring of the planetary gear transmission pair is rotatably connected to the inner wall of the slurry tank and is provided with a plurality of scrapers that scrape along the inner wall of the slurry tank.

5. The automotive catalyst carrier coating device according to claim 4, characterized in that: The inner wall of the slurry tank is provided with a limiting ring that fits with the upper surface and lower surface of the ring gear in the planetary gear transmission pair.

6. The automotive catalyst carrier coating device according to claim 4, characterized in that: A planetary gear holder is provided between the sun gear and the planetary gear in the planetary gear pair. The telescopic rod includes a fixed shaft connected to the top of the slurry tank and a sliding sleeve slidably connected to the fixed shaft and connected to the planetary gear. The sliding sleeve is rotatably connected to the planetary gear holder.

7. The automotive catalyst carrier coating device according to any one of claims 3 to 6, characterized in that: The main stirring rod and the auxiliary stirring rod are provided with a plurality of vertically staggered stirring blades.

8. The automotive catalyst carrier coating device according to claim 7, characterized in that: The bottom connecting part includes a base arranged on the bottom plate, a connecting seat arranged on the base and a mounting seat arranged on the connecting seat. The bottom trough is arranged in the mounting seat. A cavity connected to the bottom trough is provided in the connecting seat and the base. A feed pipe is provided between the cavity and the slurry tank. A plurality of guide vanes are provided in the base, extending from the end of the feed pipe toward the inside of the connecting seat. A table for placing the automobile catalyst carrier is formed between the top of the connecting seat and the inner wall of the connecting seat.

9. The automotive catalyst carrier coating device according to claim 8, characterized in that: It also includes a sleeve connected to the feed pipe, a piston that can seal the feed pipe is slidably and sealingly connected inside the sleeve, one end of the piston is slidably connected inside the sleeve and an air bag and a return spring are provided between the piston and the inner wall of the sleeve, and the air bag is connected to the negative pressure pump.

10. The automotive catalyst carrier coating device according to claim 8 or 9, characterized in that: The bottom connecting piece further comprises a sealing sleeve arranged on the top or inner wall of the mounting seat.

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