JPH0330575Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a single-type catalyst exhaust gas purification device, etc., which is installed to purify the exhaust gas generated when the engine of a vehicle is driven. Regarding the improvement of a supporter that also serves as a seal, which is used to prevent the leakage of unpurified exhaust gas between the outer surface of a catalyst section and the inner surface of the exhaust gas passage section, and is formed by combining a sealing material and a supporter section, and further relates to Specifically, it is easy to assemble and can be done with one touch, and even when subjected to high heat and vibration, the sealing material fitted to the supporter can be fixed in position without fear of shifting or coming off, and has reliable sealing and heat insulation performance. In particular, the present invention relates to the provision of a supporter that also serves as a seal and has high reliability and can be expected to have uniform sealing performance, heat insulation performance, and strength properties that do not change over the entire circumference.

As a conventional sealing material, a rod-shaped or band-shaped sealing member is made by coating an inorganic material on a core formed of a thin metal wire, and one longitudinal end of the rod-shaped or band-shaped sealing member is attached depending on the object. and the other end are connected by means such as welding or intertwining to form a ring-shaped sealing material, and when this sealing material is used, differences in external dimensions, such as steps and protrusions, will inevitably occur at the connected portion. etc., which impairs the sealing function and causes a decrease in heat insulation properties, which is contrary to the inherent properties of the sealing material. In addition, since the sealing material and the supporter are combined in such a manner that they are attached to the front or back surface of the supporter material or sandwiched between two materials, the supporter material is attached within the blocking plane at the sealing material installation position. There was a problem that the sealing material did not exhibit its full performance due to the presence of the layer.

The seal supporter according to the present invention was created in view of the problems of the conventional seal supporter, and its gist is that it is made of thin metal wire and has two outer rows at at least one appropriate location along its length. A knitted or woven fabric having an endless annular sealing groove with protrusions protruding toward the direction, and the bottom surface of the sealing groove on the inside of the cylindrical body made of thin metal wires arranged in parallel in the direction transverse to the sealing groove. A cylindrical body and a cylindrical body made of knitted or woven metal wire are sequentially wound outward along the length of the cylindrical body on one side of the entire circumferential end thereof, or are rolled in a cylindrical state. The outer surface of an endless seal extensible ring body formed by compression in the length direction of a cylinder is coated with an inorganic material, and has an inner diameter that can come into contact with and fit into the bottom surface of the seal groove. and a sealing material having the following features, and the sealing material is fitted into a sealing groove of the cylindrical body.

The details of the present invention will be explained based on illustrated examples. 1st
In the figure, a typical embodiment of the seal supporter A of the present invention is shown, the supporter part B used in the embodiment is shown in Fig. 2, and the sealing material C and its forming process are shown in Fig. 3. ing. The supporter part B according to the present invention is made of a thin metal wire 1, and has two rows of protrusions 2, 2 protruding outward at at least one proper position in the longitudinal direction, that is, in the vertical direction in the figure, and is formed into an endless annular shape. A seal groove D is formed, and the bottom surface 4 of the seal groove D on the inside side of the cylinder 3 is formed of thin metal wires 1 arranged in parallel in the direction transverse to the seal groove D. Preferably, the bottom surface of the seal groove D is formed as shown in FIG. The cylinder body 3 is made of knitted or woven fabric, for example, in which four thin metal wires 1 arranged in parallel are arranged in two stages in the inner and outer directions of the cylinder body 3 to form a seal groove bottom surface 4. Further, the sealing material C according to the present invention is an endless metal core expandable ring body E, as a preferable example,
A cylindrical body 6 as shown in A in the figure is made of a thin metal wire 1, such as a stainless steel wire with a wire diameter of 0.15 mm, and made of knitted fabric such as stockinette stitch or woven fabric.
, one side of the entire circumferential end is sequentially wound outward along the length direction, that is, the axial direction, of the cylindrical body 6 as shown by the arrow in FIG. The outer surface of the endless sealing extensible ring body 5 shown in FIG. As shown, the asbestos string 7 is continuously wound around the outer periphery of the ring body 5 in a single or multiple layers to cover it, and the bottom surface 4 of the sealing groove of the cylinder body 3, which is the supporter part B mentioned above, It has an inner diameter that allows it to abut and fit. Then, the present seal material C is fitted into the seal groove D of the aforementioned cylindrical body 3, which is the supporter portion B, to constitute the seal-cum-supporter A according to the present invention.

Therefore, in the seal supporter according to the present invention, the seal supporter A is interposed in the gap 11 between the inner surface of the exhaust gas passage part 9 and the outer surface of the catalyst part 10 in the exhaust gas purification device 8, as shown in FIG. At this time, the inner circumferential length of the supporter part B and the sealing material C is set to be slightly smaller than the outer circumferential length of the catalyst part 10, and the thin metal wire 1 of the supporter A that also serves as a seal is fitted with the sealing material C. After the catalyst part 10 is press-fitted into the seal-cum-supporter A by utilizing the elasticity of knitting or weaving, the catalyst part 10 is set in the exhaust gas passage part 9, which is divided into two parts, for example, and the upper and lower parts are If the inner circumferential surface of the exhaust gas passage part 9 presses the outer circumferential surface of the seal-cum-supporter A to interpose the installation, the seal material C of the seal-cum-supporter A can be
The thin metal wires 1 arranged in parallel on the bottom surface of the seal groove 4 are inserted into the inorganic material F covering the outer surface of the seal material C by the elastoplasticity of the material F, and the inner surface of the seal material C is formed. A sealing material C is exposed on the inner surface of the supporter part B and is in close contact with the outer surface of the catalyst part 10.
The outer diameter side surface is pressed and comes into close contact with the inner surface of the exhaust gas passage section 9, thereby reliably blocking the leakage of unpurified exhaust gas from the gap 11 between the inner surface of the exhaust gas passage section 9 and the outer surface of the catalyst section 10. Moreover, since the sealing material C is an endless continuous ring with a uniform cross section, even higher reliability of shutoff can be expected. In addition, even if vibrations, shocks, etc. are applied to the seal groove D of the supporter part B and the two protrusions 2, 2 sandwiching the seal groove D, there is a risk that the seal material C fitted in the seal groove D may shift or come loose. It doesn't exist at all. Here, these supporter part B and sealing material C are
Since its constituent materials are thin metal wire 1 and inorganic material F, it is heat resistant, and a sealing material C is interposed in a heat conduction space such as between the inner surface of the exhaust gas passage part 9 and the outer surface of the catalyst part 10 in a shielded state. If this is done, it will exhibit high heat insulation properties, and since the sealing material C is an endless continuous ring with a uniform cross section, high reliability in the heat insulation properties can be expected.

Further, the sealing material C of the sealing supporter according to the present invention is made by using the endless sealing extensible ring body 5 made of the cylinder body 6 made of the knitted or woven metal wire 1 described above as a preferable example in FIG. If the outer surface of the ring body 5 is constructed by continuously wrapping the ring body 5 in single or multiple layers, the elasticity of expansion and contraction in the circumferential direction and the cross-sectional direction of the seal material can be dramatically increased. This not only makes assembly work such as press-fitting the catalyst part even easier, but also makes the contact between the outer surface of the catalyst part and the inner surface of the exhaust gas passage part even tighter, further improving sealing performance and heat insulation performance. It is possible to specifically achieve a continuous ring with a uniform cross section, no discontinuities, uniform strength, and high reliability in sealing performance and heat insulation performance.

The bottom surface 4 of the seal groove of the supporter part is made up of thin metal wires 1, 1 arranged in parallel in two stages in the inner and outer directions of the cylindrical body 3, which is the supporter part B, as shown in FIG.
When the seal supporter with the seal material C fitted into the seal groove D is installed between the outer surface of the catalyst section 10 and the exhaust gas passage section 9 in the manner described above as shown in FIG. 5, a two-stage parallel arrangement is formed. Due to the difference in the degree of penetration of the thin metal wires 1, 1 into the surface of the sealing material, a difference occurs in the force applied to the thin metal wires 1, 1 to return to their original positions, and due to this difference, the sealing material when subjected to vibration This provides cushioning properties that maintain the contact relationship between the outer surface of the catalyst part and the inner surface of the exhaust gas passage part, thereby reinforcing the sealing function and heat insulation performance. The formation of the bottom of the seal groove by the two-stage parallel arrangement of thin metal wires is achieved by, for example, knitting a double-layered cylindrical body with thin metal wires by stockinette knitting, and then stopping the weaving at the position where the seal grooves are to be created. If the thin metal wires for knitting are directly stretched, that is, by skipping two stitches, for example, the thin metal wires will not be in a flat state but in a parallel arrangement with different steps.After that, if seal grooves are formed in the circumferential direction by pressing a die. This allows the bottom surface of the seal grooves to be formed in a two-step parallel arrangement with steps.

In addition, as shown in FIG. 6, the supporter part constituting the present seal supporter extends obliquely to the length direction of the cylinder in a part of the cylinder made of a knitted or woven fabric made of thin metal wires other than the part in which the seal groove D is formed. Corrugated 12 and outer surface of catalyst section 10 and exhaust gas passage section 9
If the corrugation 12 is formed with a height slightly larger than the gap with the inner surface, even if the catalyst tries to move due to vibrations caused by the engine drive of the vehicle and the vehicle running, the elastic restoring force due to the corrugation of the supporter part will be maintained. It can be made into a supporter with cushioning properties that can act and absorb instantly.

The seal supporter according to the present invention as described above is made of thin metal wire, and has an endless annular seal groove formed by two rows of outwardly protruding ridges at at least one suitable location in the longitudinal direction, and has an endless ring-shaped seal groove. A cylinder made of knitted or woven fabric made of thin metal wires arranged in parallel on the bottom surface of the inside of the cylinder in the direction across the sealing groove, and a cylinder made of knitted or woven fabric made of fine metal wires. An extensible ring body for an endless seal formed by sequentially winding the entire circumferential end of one side outward along the length direction of the cylinder or compressing it in the length direction of the cylinder in a cylindrical state. a sealing material having an outer surface coated with an inorganic material and having an inner diameter that can be fitted into contact with the bottom surface of the sealing groove, and the sealing material is placed in the sealing groove of the cylinder body. Since it is a fitted product, the assembly can be completed by simply fitting it onto the outer periphery of the catalyst section located in the exhaust gas passage part of the exhaust gas purification device of a vehicle, etc., so the assembly work is easy and can be done with one touch.
Since the sealing material is fitted into a sealing groove with protrusions on both sides, the sealing material can be fixed in position without fear of shifting or coming off even when subjected to high heat and vibration, and the bottom of the sealing groove is arranged in parallel. The thin metal wire bites into the surface of the sealing material, and the surface of the sealing material directly contacts the outer surface of the catalyst part and the inner surface of the exhaust gas passage part, so it has reliable sealing performance and heat insulation performance, and in particular, the sealing material has an endless shape. As a result, uniform sealing performance, heat insulation performance, and strength properties can be expected without change over the entire circumference, resulting in high reliability.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a typical embodiment of the seal supporter according to the present invention, FIG. 2 is an explanatory diagram of the supporter part of the one in FIG. 1, and FIG. 3 is an explanatory diagram of the sealing material and forming process of the one in FIG. 1. FIG. 4 is an explanatory enlarged end view of the seal groove, FIG. 5 is an explanatory sectional view of an example of installation in an exhaust gas purification device, and FIG. 6 is an explanatory diagram showing another aspect of the supporter part. A: Seal supporter, B: Supporter part, C: Sealing material, D: Seal groove, E: Endless metal core elastic ring body, F: Inorganic material, 1: Fine metal wire, 2: Projection, 3: Cylindrical body, 4: Seal groove bottom surface,
5: Telescopic ring body for endless seal, 6: Cylindrical body,
7: Asbestos string, 8: Exhaust gas purification device, 9: Exhaust gas passage section, 10: Catalyst section, 11: Gap, 12:
With waves.

Claims (1)

[Claims for Utility Model Registration] 1. An endless annular sealing groove made of thin metal wire with two rows of outwardly protruding ridges provided at at least one appropriate location in the longitudinal direction, and a cylindrical body of the sealing groove. A cylinder made of knitted or woven fabric whose inner bottom surface is made of thin metal wires arranged in parallel in the direction transverse to the sealing groove, and a cylinder made of knitted or woven fabric made of thin metal wires, with a full circle on one side. The outer surface of an extensible ring body for an endless seal is formed by sequentially winding the peripheral end outward along the length of the cylinder or compressing it in the length direction of the cylinder in a cylindrical state. a sealing material having an inner diameter that can be fitted into contact with the bottom surface of the sealing groove; and the sealing material is fitted into the sealing groove of the cylindrical body. A supporter that doubles as a sticker. 2. The seal-cum-supporter according to claim 1, wherein the thin metal wires arranged in parallel on the bottom surface of the seal groove are arranged in two stages in the inner and outer directions of the cylinder body.