Transition sleeve for slurry coating of ceramic carrier for tail gas purification

Abstract

The utility model relates to a transition sleeve for slurry coating of a ceramic carrier for tail gas purification, which comprises a cylinder made of rubber, a stepped flow guide hole is arranged inside the cylinder and is divided into an upper section and a lower section, the inner diameter of the upper section is smaller than that of the lower section, and a connecting plane abutting against the top end face of the carrier is formed at the junction of the two sections. A circumferential support body and a vertical support body are arranged in the rubber body; the circumferential support body comprises a plurality of annular metal sheets which are embedded in the lower-section rubber body and are arranged up and down; a plurality of vertical holes are formed in the rubber body, the vertical supporting body comprises vertical metal sheets arranged in the vertical holes in a penetrating mode, and limiting holes are formed in the vertical metal sheets; the rubber body is provided with an upper limiting structure and a lower limiting structure corresponding to the upper section and the lower section respectively, and the limiting hole can be selectively connected with the upper limiting structure in a matched mode so that the vertical metal sheet can be supported in the corresponding section of the rubber body. According to the structure, the metal support is embedded in the rubber body, so that the flexibility of rubber is kept, a carrier is protected from being damaged, stable support is provided, accurate assembly is facilitated, and the operation difficulty is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of catalyst slurry coating, in particular to a transition sleeve for slurry coating of a ceramic carrier for tail gas purification. Background Art

[0002] Slurry coating is a crucial step in catalyst manufacturing, primarily intended to coat the inner walls of the honeycomb structure within the catalyst carrier with slurry. Currently, slurry coating involves injecting slurry into one end of the catalyst carrier using an injection device. After a measured amount of slurry is injected, air is drawn from the lower end of the catalyst carrier, using atmospheric pressure to squeeze the slurry into the honeycomb structure. This creates the manufacturing requirement for coating the inner walls of the honeycomb structure with slurry. During the slurry feeding process, a transition sleeve is used at one end of the catalyst carrier to facilitate docking and slurry injection.

[0003] For example, a Chinese patent document discloses a transition sleeve for slurry coating of a metal carrier used for exhaust gas purification (Patent No. ZL 202320419394.9). The sleeve comprises a main body with a vertically extending flow guide hole. The upper inlet of the guide hole is designed as an inverted cone to facilitate slurry entry, while the lower outlet of the guide hole is designed as a constant-diameter hole slightly smaller than the inner diameter of the metal carrier. The bottom of the main body is concave to form a connecting surface. The connecting surface is provided with a sealing groove on its outer surface. The bottom of the sealing groove is sealed against the top surface of the metal carrier shell, and the inner sidewall of the sealing groove is sealed to the inner side surface of the metal carrier shell. The inner sidewall of the sealing groove is provided with at least one mounting groove, each of which is equipped with a sealing rubber ring. The main body of the transition sleeve for slurry coating is often made of a high-strength metal material and is primarily suitable for slurry coating of metal carriers. Since ceramic carriers are more fragile than metal carriers, their outer surface is easily worn during use. Therefore, a transition sleeve suitable for coating ceramic carriers is needed. Utility Model Content

[0004] The technical problem to be solved by the present invention is to overcome the above-mentioned problems and provide a transition sleeve for slurry coating of a ceramic carrier for exhaust gas purification, which can not only protect the ceramic carrier, make the appearance not easily damaged, and have a strong connection tightness; but also provide a stable support structure, which is easy to be put on the carrier and reduce the difficulty of operation.

[0005] The technical solution of the utility model is:

[0006] The utility model discloses a transition sleeve for slurry coating of a ceramic carrier for exhaust gas purification, comprising a cylindrical body, wherein a stepped flow guide hole is provided in the cylindrical body to divide the cylindrical body into an upper section and a lower section with a smaller inner diameter at the top and a larger inner diameter at the bottom, and the intersection of the two sections forms a connecting plane that abuts against the top surface of the ceramic carrier. The utility model is characterized in that: the cylindrical body is made of a rubber body and a circumferential support body and a vertical support body are provided in the rubber body; the circumferential support body comprises a plurality of annular metal sheets embedded in the rubber body of the lower section and arranged in sequence along the upper and lower directions;

[0007] The rubber body is provided with a plurality of vertical holes extending vertically therethrough. The vertical support body includes a vertical metal sheet passing through each vertical hole. A limit hole is provided on the vertical metal sheet. An upper limit structure and a lower limit structure are provided on the corresponding upper and lower sections of the rubber body respectively. The limit holes can be selectively connected with the upper limit structure or the lower limit structure to support the vertical metal sheet in the corresponding section of the rubber body.

[0008] In the above structure, a combination structure of a circumferential support body and a vertical support body made of metal embedded in the rubber body is utilized to give full play to the flexible protective function of the rubber body, protect the outer wall of the carrier and have sufficient strength to facilitate the precise assembly of the ceramic carrier; at the same time, the vertical support body is designed to be adjustable up and down, and can be selectively adjusted to the upper or lower section of the rubber body during carrier assembly or slurry pouring to meet the strength support requirements in different situations.

[0009] Furthermore, in the transition sleeve for slurry coating of the ceramic carrier for exhaust gas purification described in the utility model, the upper limit structure includes a first radial hole radially penetrating the vertical hole from the outer side wall of the rubber body of the upper section, and a first threaded hole is formed at the inner end of the first radial hole. The vertical metal sheet and the rubber body of the upper section are connected by screws that penetrate the first radial hole, the limiting hole, and the first threaded hole in sequence.

[0010] Furthermore, in the transition sleeve for slurry coating of a ceramic substrate for exhaust gas purification described in the present invention, the lower retaining structure includes a second radial hole extending radially through the outer wall of the lower rubber body and connected to one of the annular metal sheets. The annular metal sheet has a corresponding second threaded hole. The vertical metal sheet and the lower rubber body are connected in a positionally fixed manner by screws that penetrate the second radial hole, the retaining hole, and the second threaded hole in sequence. The connection between the vertical metal sheet and the annular metal sheet further enhances the overall structural strength.

[0011] Furthermore, in the transition sleeve for slurry coating of the ceramic carrier for exhaust gas purification described in the present invention, the annular metal sheets are divided into at least two groups that are concentrically arranged but have different inner diameters, and are thus staggered in the radial direction to ensure that the transition sleeve has good strength at all radial locations.

[0012] Furthermore, in the transition sleeve for slurry coating of the ceramic carrier for exhaust gas purification described in the present invention, there are no less than three annular metal sheets, and the inner diameters of the top and bottom annular metal sheets are the same and smaller than the inner diameters of the remaining annular metal sheets.

[0013] Furthermore, in the transition sleeve for slurry coating of the ceramic carrier for exhaust gas purification described in the present invention, the vertical metal sheet is in the shape of an arc sheet and is concentric with the rubber body.

[0014] Furthermore, in the transition sleeve for slurry coating of the ceramic substrate for exhaust gas purification described in the present invention, a stop edge is provided at the lower end of the vertical hole. This structure is to prevent the vertical metal sheet from freely falling out of the lower end of the vertical hole after the screw locking effect is released during adjustment.

[0015] Furthermore, in the transition sleeve for slurry coating of the ceramic carrier for exhaust gas purification described in the present invention, the limiting hole is located in the middle of the vertical metal sheet to ensure the stability of the limiting connection of the vertical metal sheet.

[0016] The beneficial effects of the utility model are:

[0017] The main body of the utility model adopts a rubber body to replace the metal filter sleeve, which is suitable for ceramic carriers. It fully utilizes the flexible characteristics of the rubber body to wrap around the outer wall of the carrier, which can effectively protect the outer surface of the carrier from damage and achieve a tight connection effect without the need for an external sealing ring.

[0018] The utility model adopts the form of a metal support structure embedded in the rubber body. Through the combination of the circumferential support body and the vertical support body, the structural strength of the transition sleeve is increased, which not only maintains the flexibility of the rubber, but also provides a stable support frame, enhances the overall rigidity, facilitates precise assembly with the ceramic carrier, and reduces the difficulty of operation.

[0019] The vertical support body of the utility model is designed to be adjustable up and down and is designed with an upper limit structure and a lower limit structure. The rubber body of one or the lower section can be selected according to actual needs. When assembling the ceramic carrier, the vertical support body can be locked and limited in the lower section to play a role of strengthening support, avoiding insufficient structural strength during assembly and causing difficulty in assembly; after assembly, the vertical support body can be adjusted to the upper section for auxiliary support, avoiding the phenomenon of lateral instability at the upper section inlet during the slurry pouring process.

[0020] The upper and lower limit structures of the utility model are both connected by screws to holes, which has a simple design, a simple and flexible adjustment method and is easy to implement. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic axial cross-sectional view of the utility model in use state 1.

[0022] Figure 2 for Figure 1 A partial enlarged schematic diagram.

[0023] Figure 3 This is a schematic axial cross-sectional view of the utility model in the second use state.

[0024] Figure 4 It is a radial cross-sectional schematic diagram of the present invention. DETAILED DESCRIPTION

[0025] The present invention will now be further described with reference to the accompanying drawings:

[0026] Reference Figure 1 As shown, the transition sleeve for slurry coating of a ceramic carrier for exhaust gas purification described in this embodiment includes a cylindrical body made of a rubber body 1, and a stepped guide hole is provided in the cylindrical body to divide the cylindrical body into an upper section and a lower section with a smaller inner diameter at the top and a larger inner diameter at the bottom. The junction of the two sections forms a connecting plane 3 that abuts against the top surface of the ceramic carrier 2.

[0027] Reference Figure 1 、 Figure 2 、 Figure 4 As shown, the rubber body 1 is provided with a circumferential support body and a vertical support body. The circumferential support body comprises at least three annular metal sheets 4 embedded in the rubber body 1 in the lower section 1b and arranged in a vertical sequence. The annular metal sheets 4 are divided into at least two groups arranged concentrically but with different inner diameters. The inner diameters of the topmost and bottommost annular metal sheets 4 are the same and smaller than those of the other annular metal sheets 4.

[0028] The rubber body 1 is provided with a plurality of vertical holes 5 extending vertically therethrough. The vertical support body includes a vertical metal sheet 6 passing through each vertical hole 5. The vertical metal sheet 6 is in the shape of an arc sheet and is concentric with the rubber body 1. A limiting hole 6a is provided on the vertical metal sheet 6; the limiting hole 6a is located in the middle of the vertical metal sheet 6.

[0029] Combine Figure 1 、 Figure 2 and Figure 3 The rubber body 1 is provided with an upper limit structure 7 and a lower limit structure 8 in the corresponding upper and lower sections respectively. The limit hole 6a can be selectively connected with the upper limit structure 7 or the lower limit structure 8 to support the vertical metal sheet 6 in the corresponding section of the rubber body 1.

[0030] Specifically, the upper limit structure 7 described in this embodiment includes a first radial hole 7a that radially penetrates the vertical hole 5 from the outer wall of the rubber body 1 of the upper section, and a first threaded hole 7b is formed at the inner end of the first radial hole 7a. The vertical metal sheet 6 and the rubber body 1 of the upper section are connected in a limited manner by screws that penetrate the first radial hole 7a, the limiting hole 6a, and the first threaded hole 7b in sequence.

[0031] The lower limiting structure 8 includes a second radial hole 8a that radially penetrates the vertical hole 5 from the outer wall of the rubber body 1 of the lower section and is connected to one of the annular metal sheets 4. A second threaded hole 8b is correspondingly opened on the annular metal sheet 4. The vertical metal sheet 6 and the rubber body 1 of the lower section are limitedly connected by screws that penetrate the second radial hole 8a, the limiting hole 6a, and the second threaded hole 8b in sequence.

[0032] In order to prevent the vertical metal sheet 6 from falling out of the lower end of the vertical hole 5 , a limit stop 9 is provided at the lower end of the vertical hole 5 .

[0033] During the use of this embodiment, when assembling the ceramic carrier 2, the vertical metal sheet 6 is moved downward along the vertical hole 5 to align with the lower limit structure 8, and the screw is passed through the second radial hole 8a and the limit hole 6a of the vertical metal sheet 6, and screwed into the second threaded hole 8b, thereby fixing the vertical metal sheet 6 in the lower section of the rubber body 1, and working together with the annular metal sheet 4 to strengthen the structural support force, which helps the carrier 2 to be smoothly assembled into the lower section of the transition sleeve; since the outer surface of the ceramic carrier 2 is only in direct contact with the rubber body 1, the outer surface of the carrier 2 is effectively avoided from being damaged, and at the same time, the elasticity of the rubber body 1 itself is used to firmly wrap the carrier 2 to achieve good sealing, and the sealing ring design is omitted.

[0034] After the assembly is completed, remove the screws, push the vertical metal sheet 6 upward, align it with the upper limit structure 7, and pass the screws through the first radial hole 7a and the limiting hole 6a, and screw them into the first threaded hole 7b, thereby limiting the vertical metal sheet 6 on the upper rubber body 1 for auxiliary support to avoid lateral instability when slurry enters.

[0035] The specific embodiments described herein are merely illustrative of the principles and effects of this utility model and are not intended to limit this utility model. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, any equivalent modifications or alterations made by a person skilled in the art without departing from the spirit and technical concepts disclosed in this utility model are encompassed by the claims of this utility model.

Claims

1. A transition sleeve for slurry coating of a ceramic support for exhaust gas purification, comprising a cylindrical body, wherein a stepped flow guide hole is provided in the cylindrical body to divide the cylindrical body into upper and lower sections with smaller inner diameters at the top and larger at the bottom, and wherein the intersection of the two sections forms a connecting plane that abuts against the top surface of the ceramic support, characterized in that: The cylindrical body is made of rubber and a circumferential support body and a vertical support body are provided in the rubber body; the circumferential support body comprises a plurality of annular metal sheets embedded in the rubber body of the lower section and arranged in sequence along the upper and lower sides; The rubber body is provided with a plurality of vertical holes extending vertically therethrough. The vertical support body includes a vertical metal sheet passing through each vertical hole. A limit hole is provided on the vertical metal sheet. An upper limit structure and a lower limit structure are provided on the corresponding upper and lower sections of the rubber body respectively. The limit holes can be selectively connected with the upper limit structure or the lower limit structure to support the vertical metal sheet in the corresponding section of the rubber body.

2. The transition sleeve for slurry coating of a ceramic carrier for exhaust gas purification according to claim 1, characterized in that: The upper limit structure includes a first radial hole that radially penetrates the vertical hole from the outer wall of the rubber body of the upper section, and a first threaded hole is formed at the inner end of the first radial hole. The vertical metal sheet and the rubber body of the upper section are connected by screws that penetrate the first radial hole, the limiting hole, and the first threaded hole in sequence.

3. The transition sleeve for slurry coating of a ceramic carrier for exhaust gas purification according to claim 1, characterized in that: The lower limiting structure includes a second radial hole that radially penetrates the vertical hole from the outer wall of the rubber body of the lower section and is connected to one of the annular metal sheets. A second threaded hole is correspondingly opened on the annular metal sheet. The vertical metal sheet and the rubber body of the lower section are connected in a limiting manner by screws that penetrate the second radial hole, the limiting hole, and the second threaded hole in sequence.

4. The transition sleeve for slurry coating of a ceramic carrier for exhaust gas purification according to claim 1, characterized in that: The annular metal sheets are divided into at least two groups which are concentrically arranged but have different inner diameters.

5. The transition sleeve for slurry coating of a ceramic carrier for exhaust gas purification according to claim 4, characterized in that: There are no less than three annular metal sheets, and the inner diameters of the top and bottom annular metal sheets are the same and smaller than the inner diameters of the other annular metal sheets.

6. The transition sleeve for slurry coating of a ceramic carrier for exhaust gas purification according to claim 1, characterized in that: The vertical metal sheet is in the shape of an arc sheet and is concentric with the rubber body.

7. The transition sleeve for slurry coating of a ceramic carrier for exhaust gas purification according to claim 1, characterized in that: A limit stop edge is provided at the lower end of the vertical hole.

8. The transition sleeve for slurry coating of a ceramic carrier for exhaust gas purification according to claim 1, characterized in that: The limiting hole is located in the middle of the vertical metal sheet.

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