CN114656193A

CN114656193A - Non-expansion type gasket for GBD (GBD) packaging and preparation method thereof

Info

Publication number: CN114656193A
Application number: CN202210467115.6A
Authority: CN
Inventors: 吴尔波
Original assignee: Yueqing Huari Refractory Equipment Co ltd
Current assignee: Yueqing Huari Refractory Equipment Co ltd
Priority date: 2022-04-29
Filing date: 2022-04-29
Publication date: 2022-06-24

Abstract

The invention relates to a non-expansion type gasket for GBD (GBD) packaging, which is characterized by comprising 90-95% by mass of ceramic fibers and 5-10% by mass of an adhesive, wherein the ceramic fibers comprise alumina fibers, silica fibers and iron oxide fibers in a ratio of 4-5: 1, and the adhesive is acrylic emulsion. The invention provides a ceramic fiber liner for treating automobile engine exhaust, which is prepared from alumina fiber, silica fiber, iron oxide fiber and organic adhesive. The produced non-expansion type gasket uses more fibers and less adhesive, and the engine exhaust gasket has better sealing property, better durability, better anti-erosion performance and better protective carrier, and meets the requirements of environmental protection. The heat insulation liner product not only meets higher application requirements of customers, but also has a larger price advantage compared with foreign products, and is a product with high cost performance for domestic replacement of imported products.

Description

Non-expansion type gasket for GBD (GBD) packaging and preparation method thereof

Technical Field

The invention relates to the field of engine tail gas treatment, in particular to a non-expansion type gasket for GBD packaging and a preparation method thereof.

Background

The heat-insulating sealing gasket of the catalytic converter is a part wrapping the carrier, has the main functions of fixing and packaging the carrier, providing buffer protection effect, and has the functions of heat insulation, sound insulation and the like. The quality of the liner directly affects the exhaust treatment effect of the engine. The supporting force of the liner is too large, the carrier is easy to crush, the exhaust gas is leaked, the emission does not reach the standard, the environment is polluted, and the social influence and public praise of automobile manufacturers are influenced.

The non-expansion type gasket of the GBD packaging is mainly used for meeting the design requirement of the packaging effect well according to the change of the non-expansion type gasket suitable for the packaging equipment in the packaging process of the packaging equipment.

With the upgrade of the six national standards for exhaust emission, the automobile engine exhaust liner has been put to higher requirements: high temperature resistance, better aging performance, better anti-erosion capacity and safer cold pressure (the three-way catalyst is easy to crack due to overlarge cold pressure).

The existing technical scheme is that common ceramic fiber cotton is added with vermiculite and adhesive in a certain proportion and processed into a liner by a wet process, and the ageing durability of the common ceramic fiber is difficult to meet the technical requirements of the harsh national six-tail gas standard.

Disclosure of Invention

The present invention aims to provide a non-intumescent gasket for GBD encapsulation and a method for its preparation, which solves the above existing problems.

In order to achieve the above object, the present invention provides a technical solution,

the non-intumescent gasket for GBD packaging is characterized by comprising 90-95% by mass of ceramic fibers and 5-10% by mass of an adhesive, wherein the ceramic fibers comprise alumina fibers, silica fibers and iron oxide fibers in a ratio of 4-5: 1, and the adhesive is acrylic emulsion.

In addition, the invention also provides a preparation method of the non-intumescent gasket for GBD encapsulation, which comprises the following steps:

1. preparing a ceramic fiber raw material, wherein the fiber raw material comprises alumina fiber, silica fiber and iron oxide fiber, and the proportion of the alumina fiber, the silica fiber and the iron oxide fiber is 4-5: 1;

2. preparing a binder, wherein the binder is acrylic emulsion;

3. putting the ceramic fiber raw material in the process 1 into a pulper, adding water, stirring and pulping until the ceramic fiber raw material is completely crushed, opening a valve of a pulp pump, and conveying the pulp to a pulp barrel;

4. opening a propeller of the pulp barrel to stir so as to uniformly disperse the fibers, and sampling to determine the concentration; if the concentration does not meet the technical parameters, adding water or adjusting fibers, and re-measuring the concentration until the production requirement is met;

5. setting corresponding network speed parameters of a conveying network and corresponding compression roller height parameters according to a production plan and process parameters; opening a conveying net, opening a flushing valve, opening a feeding pump, opening a sizing machine, placing an adhesive in the sizing machine, and finally opening a flow box to uniformly disperse fibers on a net belt;

6. opening a water suction valve of a vacuum pump, and sucking water for the formed fiber gasket on the mesh belt to reduce the water content of the gasket; 7, after the fiber lining is flattened by the pressing roller, the fiber lining is smoothly and automatically moved into the drying tunnel;

8. setting the temperature of five corresponding temperature zones of the drying tunnel according to different types of products, wherein the temperature of a first temperature zone is 85-95 ℃, the temperature of a second temperature zone is 120-165 ℃, the temperature of a third temperature zone is 130-170 ℃, the temperature of a fourth temperature zone is 125-165 ℃, and the temperature of a fifth temperature zone is 80-130 ℃;

9. and cutting the corresponding length of the dried and formed liner according to the requirement of a production plan, weighing, checking the appearance and sampling again, and testing the sampled semi-finished product to ensure that the design requirement is met.

The invention further provides that: in the process 3, after the ceramic fiber raw material is placed in the pulper, a water inlet valve is opened, a water suction pump is opened to add water, the stirrer is opened, when the water level rises to at least 80%, the water suction pump is closed, and the water inlet valve is closed; pulping for at least 5 minutes, opening a valve of a pulp pump when the fibers are completely crushed, and conveying the pulp to a pulp barrel;

according to the further arrangement of the invention, in the process 4, when the propeller of the pulp barrel is opened for stirring to uniformly disperse the fibers, the stirring time is at least 5 minutes.

The invention has the beneficial effects that: the invention provides a ceramic fiber liner for treating automobile engine exhaust, which is prepared from alumina fiber, silica fiber, iron oxide fiber and organic adhesive. The produced non-expansion type gasket uses more fibers and less adhesive, and the engine exhaust gasket has better sealing property, better durability, better anti-erosion performance and better protective carrier, and meets the requirements of environmental protection. The heat insulation liner product not only meets higher application requirements of customers, but also has a larger price advantage compared with foreign products, and is a product with high cost performance for domestic replacement of imported products.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is a statistical graph of experimental results of the package performance of the present invention.

Fig. 2 is a statistical chart of the experimental results of the erosion resistance performance of the present invention.

Fig. 3 is a statistical chart of the experimental results of the aging performance of the present invention.

Fig. 4 is a statistical diagram of the results of the working environment simulation experiment-durability experiment of the present invention.

FIG. 5 is a comparison of durability performance of the present invention and a game article, as shown in FIG. 1.

FIG. 6 is a comparison of durability performance of the invention and a game article in FIG. 2.

FIG. 7 is a comparison of durability performance of the present invention and a game article, and FIG. 3.

FIG. 8 is a comparison of durability performance of the present invention and a game article to detect FIG. 4.

FIG. 9 is a statistical chart of the results of the experiment for loss on ignition according to the present invention.

Fig. 10 is a perspective view of the gasket of the present invention.

Fig. 11 is a top view of the liner of the present invention.

Reference numeral, 10, a gasket body; 20. a notch portion; 30. a filling section; 40. a first rounded corner; 50. A second rounded corner;

Detailed Description

Embodiments of the present application will be described in detail with reference to the drawings and examples, so that how to implement technical means to solve technical problems and achieve technical effects of the present application can be fully understood and implemented.

The invention relates to a non-expansion type gasket for GBD (GBD) packaging, which comprises 90-95% by mass of ceramic fibers and 5-10% by mass of an adhesive, wherein the ceramic fibers comprise alumina fibers, silica fibers and iron oxide fibers in a ratio of 4-5: 1, and the adhesive is acrylic emulsion.

2. preparing a binder, wherein the binder is acrylic emulsion;

6. opening a water suction valve of a vacuum pump, and sucking water for the formed fiber gasket on the mesh belt to reduce the water content of the gasket; 7. after the fiber lining is flattened by the compression roller, the fiber lining is slowly and automatically moved into the drying tunnel;

8. setting the temperature of five corresponding temperature zones of the drying tunnel according to different types of products, wherein the temperature of the first temperature zone is 85-95 ℃, the temperature of the second temperature zone is 120-165 ℃, the temperature of the third temperature zone is 130-170 ℃, the temperature of the fourth temperature zone is 125-165 ℃, and the temperature of the fifth temperature zone is 80-130 ℃;

Specific examples are now set forth as follows:

example 1:

1. preparing a ceramic fiber raw material, wherein the fiber raw material comprises alumina fiber, silica fiber and iron oxide fiber, 40% to 10%;

2. preparing an adhesive, wherein the adhesive is 10%, the raw material of the adhesive is acrylic emulsion, and the adhesive is used in the next step 5 and is used as glue in a sizing machine;

3. putting the fiber raw material obtained in the step 1 into a pulper, opening a water inlet valve, opening a water suction pump to add water, opening a stirrer, closing the water suction pump when the water level rises to at least 80%, and closing the water inlet valve; pulping for 5 minutes, opening a valve of a pulp pump when the fibers are completely crushed, and conveying the pulp to a pulp barrel;

4. opening a propeller of the pulp barrel to stir for 5 minutes to ensure that the fibers are uniformly dispersed, and sampling to determine the concentration; if the concentration does not meet the technical parameters, adding water or adjusting fibers, and re-measuring the concentration until the production requirement is met;

5. according to the production plan and the technological parameters, setting corresponding transmission network speed parameters (according to a technical parameter table) and setting corresponding compression roller height parameters (according to the technical parameter table); opening a conveying net, opening a flushing valve, opening a feeding pump, opening a sizing machine, opening the sizing machine according to the steps in sequence, and finally opening a flow box to uniformly disperse fibers on a net belt;

6. opening a water suction valve of a vacuum pump, and sucking water for the formed fiber gasket on the mesh belt to reduce the water content of the gasket;

7. after the fiber lining is flattened by the compression roller, the fiber lining is slowly and automatically moved into the drying tunnel;

9. cutting the dried and formed liner to a corresponding length according to the requirement of a production plan, weighing, checking the appearance, sampling again, and performing an experiment on the sampled semi-finished product to ensure that the design requirement is met;

the gasket obtained in example 1 was subjected to an experiment in which the gasket of example 1 was designated by HR1000R, and the packing property, the blow-off resistance and the aging property thereof were examined, and the results thereof were shown in fig. 1 to 3.

The durability test is carried out on the alloy, and the experimental conditions are controlled as follows: 0.45GBD, upper and lower temperature 600 ℃, RGE 8%, 10% high temperature cycle 2500 times; wherein GBD is the density of the cushion layer per unit volume in the packaging gap; RGE: 8%, 10% are 92%, 90% cycled from target gap bulk density to target gap bulk density, respectively; specific numerical values are shown in fig. 4;

meanwhile, the same products as those of the foreign company a and the foreign company B are compared to obtain the values shown in fig. 5, 6, 7, and 8.

In addition, the loss on ignition rate was measured, and the results are shown in fig. 9;

the invention provides a ceramic fiber liner for treating automobile engine exhaust, which is prepared from alumina fiber, silica fiber, iron oxide fiber and organic adhesive. The produced non-expansion type gasket uses more fibers and less adhesive, and the engine exhaust gasket has better sealing property, better durability, better anti-erosion performance and better protective carrier, and meets the requirements of environmental protection. The heat insulation liner product not only meets higher application requirements of customers, but also has a larger price advantage compared with foreign products, and is a product with high cost performance for domestic replacement of imported products.

As shown in fig. 10 to 11, the gasket manufactured according to the present invention includes a gasket body 10, a cut-out portion 20 and a filling portion 30 are formed at both sides of the gasket body 10, and when the gasket body 10 is rolled into a cylindrical shape, the filling portion 30 is located in the cut-out portion 20.

The transition of breach portion 20 is provided with first fillet 40, the transition of filling portion 30 is provided with second fillet 50, first fillet 40 and second fillet 50's size is unanimous.

According to the invention, the gap part 20 and the filling part 30 are arranged on the gasket, when the gasket is rolled into a cylinder shape, the filling part 30 is positioned at the gap part 20 to fill and connect the gap part, and then the transition part of the gap part 20 and the filling part 30 is provided with a round angle, so that the gasket can be prevented from being broken and damaged in a bending or rolling mode.

As some terms are used throughout the description and claims to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect.

It is noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a commodity or system that includes the element.

The foregoing description shows and describes several preferred embodiments of the invention, but as aforementioned, it is to be understood that the invention is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The non-intumescent gasket for GBD encapsulation is characterized by comprising 90-95% by mass of ceramic fibers and 5-10% by mass of an adhesive, wherein the ceramic fibers comprise alumina fibers, silica fibers and iron oxide fibers in a ratio of 4-5: 1, and the adhesive is acrylic emulsion.

2. A method of making a non-intumescent mat for GBD encapsulation, characterized in that: the method comprises the following steps:

2. preparing a binder, wherein the binder is acrylic emulsion;

3. putting the ceramic fiber raw material in the flow 1 into a pulper, adding water, stirring and pulping until the ceramic fiber raw material is completely crushed, opening a pulp pump valve, and conveying pulp to a pulp barrel;

4. opening a propeller of the pulp barrel to stir so as to uniformly disperse the fibers, and sampling to determine the concentration; if the concentration does not meet the technical parameters, adding water or adjusting fibers, and re-measuring the concentration until the production requirements are met;

5. setting corresponding network speed parameters of a conveying network and corresponding compression roller height parameters according to a production plan and process parameters; opening the conveying net, opening a flushing valve, opening a feeding pump, opening a sizing machine, placing an adhesive in the sizing machine, and finally opening a flow box to uniformly disperse fibers on the net belt;

3. A process for the preparation of a non-intumescent mat for GBD encapsulation according to claim 2, characterized in that: in the process 3, after the ceramic fiber raw material is placed in the pulper, a water inlet valve is opened, a water suction pump is opened to add water, the stirrer is opened, when the water level rises to at least 80%, the water suction pump is closed, and the water inlet valve is closed; beating for at least 5 minutes, opening a valve of a pulp pump after the fibers are completely crushed, and conveying the pulp to a pulp barrel.

4. A process for the preparation of a non-intumescent mat for GBD encapsulation according to claim 3, characterized in that: in the flow 4, when a propeller of the pulp barrel is opened for stirring to uniformly disperse the fibers, the stirring time is at least 5 minutes.