KR19980060197U - Soot Filter with Valve Seating - Google Patents

Abstract

The present invention relates to a valve for a soot filtration device to which the valve seating is applied, by rotating the rotating shaft 20 by high pressure air or vacuum to open and close the opening and closing plate 40 connected to the rotating rod 30 through the through hole (11) In the exhaust pipe 10 configured to control the flow of exhaust gas, a circular stepped groove 12 having a diameter larger than the through hole 11 is formed in the lower part of the through hole 11 of the exhaust pipe 10. 12) the valve seat ring 50 is formed by pressing the valve seat ring 50 of the upper and lower sides so that one side of the opening and closing plate 40 is in contact, the valve seat ring 50 as a separate part of the exhaust pipe (10) By mounting in the stepped grooves 12 formed in the through hole 11 of the through-holes, the corrosion of the wet particulate matter accumulated by the flow of the exhaust gas is significantly reduced to prevent excessive leakage of the exhaust gas, thereby improving the regeneration efficiency of the filter medium, Belt seating parts can be used for a long time. There is an effect that can extend the life of parts.

Description

Soot Filter with Valve Seating

The present invention collects the exhaust gas exhausted from the engine of diesel vehicle using the filter medium and periodically burns the smoke to regenerate the filter material. In order to prevent the excessive leakage of exhaust gas due to corrosion of the exhaust pipe and valve, the valve seat of the exhaust pipe that is in contact with the exhaust valve is closed as a separate part. A valve for a soot filtration device to which a valve seating is applied.

In general, the development of technology to purify particulate matter from diesel engines when the concentration exceeds the environmental standard is strongly required. As a technique for removing particulate matter, it is necessary to improve the design of the engine itself. It is mainly classified into combustion material suppression, improvement of combustion efficiency using additives, and post-treatment of particulate matter. The improvement of the engine itself or the use of additives has a fundamental limitation in suppressing the generation of soot, and the situation of removing by post-treatment is being sought because of causing secondary pollution of the atmosphere.

In the post-treatment method of the particulate matter, the filter medium accumulates the particulate matter contained in the exhaust gas, and burns it to periodically regenerate the filter medium. Since the standard value of the back pressure increases and the fuel is consumed excessively, it is necessary to apply the auxiliary heat in addition to the self-heat of the exhaust gas of the engine to burn the collected soot. Forcibly burns accumulated soot.

In order to ignite and burn the soot accumulated in the filter medium when the accumulated soot is combusted, the flow of exhaust gas that has flowed in the direction of the filter medium must be shut off. If the exhaust gas passes through the filter medium without being properly blocked, the electric heater The excessive supply of heat by forcible means such as burners or burners prevents the ignition from eventually reaching, and the success rate of regeneration is small.If the regeneration fails, the ignition becomes more difficult. As a result, the temperature of the filter medium is excessively increased, and thus there is a disadvantage in that breakage due to melting or non-uniform thermal stress of the filter medium is likely to occur.

Therefore, as shown in FIG. 1 attached by the necessity of effectively blocking the flow of exhaust gas during regeneration, as shown in FIG. 1, a butterfly valve which freely forms a flow path according to the flow velocity of the fluid in the exhaust brake device of a diesel vehicle. In general, such a valve is a gap 3 between the inner diameter of the exhaust pipe main body 1 and the butterfly valve disc 2, and has a large amount of gas leakage. The gap 3 of the exhaust gas is about 0.2. A gap of about mm is formed.

When such a butterfly valve is used for exhaust gas control in the diesel particulate smoke reducing device, the amount of exhaust gas leakage in the gap 3 is large, making it difficult to ignite soot.

In order to solve some of the above disadvantages, the gap size between the valve disc 2 and the gap 3 is reduced to a state where the valve disc 2 does not interfere with the operation, and the surface of the contact portion is smoothed to exhaust gas. In order to reduce the amount of leakage, the engine speed (rpm) and the load condition of the engine are severely changed, and the exhaust temperature of the exhaust gas is greatly changed so that the internal expansion of the exhaust pipe main body 1 is caused by thermal expansion of the metal constituting the valve. There was a problem that the interference between the diameter and the valve disc 2, the wear progresses, a lot of force is applied to the valve disc 2 during the valve operation to be deformed by fatigue to control the flow of the exhaust gas properly.

The use of the conventional butterfly valve as described above has been used in such a way that the opening and closing plate of the valve opens and closes the passage of the exhaust gas inlet side in the reverse displacement form in order to overcome the above-mentioned problems.

Such a scheme is described in detail in Korean Patent Application No. 95-7752 (name: valve for diesel fuel purifier) filed by the applicant of the Korean Patent Office on April 3, 1995.

However, the exhaust pipe according to the conventional exhaust gas filtering device as described above allows the rotary rod and the opening and closing plate installed on the rotational shaft of the exhaust pipe to be rotatably connected to the link connected to the cylinder rod so as to be in contact with the inner surface of the exhaust gas inlet to maintain airtightness. The valve seat is loosely fastened and the valve seat is formed at a predetermined position so that the opening and closing plate can contact the inner surface of the exhaust gas inlet to control the exhaust gas. As the material accumulates in the valve seat, the outer periphery of the valve and the valve seat area become corroded, causing gaps, which makes it difficult to regenerate the filter material due to excessive leakage of exhaust gas, which ultimately degrades the performance of the engine. There was a problem.

The present invention has been made to solve the problems as described above, by installing the valve seat portion in contact with the opening and closing plate to control the exhaust gas is installed in the exhaust pipe of the diesel fuel filter device as a separate component exhaust pipe and valve The purpose is to prevent excessive leakage of exhaust gas caused by corrosion of switchboard.

According to the present invention for achieving the above object, in the exhaust pipe to control the flow of exhaust gas through the through-opening by opening and closing the opening and closing plate connected to the rotating rod by rotating the rotating shaft in high pressure air or vacuum, A circular stepped groove having a diameter wider than a through hole is formed, and the stepped groove provides a valve for a soot filtration device to which a valve seat ring of which upper and lower surfaces are flat is pressed so that one side of the opening and closing plate contacts. Is achieved.

1 is a longitudinal sectional view showing an exhaust pipe of a conventional diesel soot filter device;

Figure 2 is a longitudinal sectional view showing a state in which the valve seat ring is applied to the exhaust pipe of the present invention.

* Explanation of symbols on the main parts of the drawings *

10: exhaust pipe 11: through air

12: stepped groove 20: rotation axis

30: rotating rod 40: opening and closing plate

50: valve seating

Hereinafter, with reference to the accompanying Figures 2 and 3 showing an embodiment of the present invention in more detail as follows.

Attached Figure 2 is a longitudinal sectional view showing a state in which the valve seating is applied to the exhaust pipe of the present invention, by rotating the rotating shaft 20 by high pressure air or vacuum to open and close the opening and closing plate 40 connected to the rotating rod 30 through In the exhaust pipe 10 is configured to control the flow of the exhaust gas through the (11), a circular stage having a predetermined diameter and a wider diameter than the through hole 11 in the lower portion of the through hole (11) of the exhaust pipe (10) A tuck groove 12 is formed, and the stepped groove 12 has one side surface of the opening and closing plate 40 in contact with the gas tight when the upper and lower side valve seating ring 50 to control the exhaust gas (50) ) Is installed by pressing.

The inner diameter of the valve seat ring 50 is formed smaller than the diameter of the through hole 11, the stepped groove 12 of the through hole is coupled and fixed by hot fitting.

In addition, the valve seat ring 50 is formed of a titanium or stainless steel material that is resistant to durability and corrosion as the wet particulate matter of the exhaust gas accumulates, and is preferably surface-treated according to precise tolerances.

Referring to the operation of the valve for the soot filtration device to which the valve seat ring of the present invention configured as described above are as follows.

First, during operation of the vehicle, a cylinder (not shown in the drawing) installed on the exhaust pipe 10 side is operated, and the rotation shaft 20 connected to one side of the link at the same time as the rotation of the link connected to one end of the rod of the cylinder has a predetermined angle. The rotary shaft 20 is orthogonally coupled to the rotary rod 30 to the inside of the exhaust pipe 10 so that the opening and closing plate 40 is rotated by the rotation angle of the link.

Then, the opening and closing plate 40 of the valve is opened at a predetermined angle by the rotary rod 30 in contact with one side of the valve seat ring 50 on the exhaust gas inlet side of the exhaust pipe 10 to the engine manifold. Pass the exhaust gas discharged from

In addition, after a predetermined time elapses when the exhaust gas passes, the rotating rod 30 contacts the valve seat ring 50 with the valve seat ring 50 by the reverse operation of the cylinder to control the exhaust gas, and opens and closes the plate 40. Particulate matter contained in the exhaust gas passing through is combusted by a combustion device installed in the filtering device, filtered through the filter medium, and discharged.

On the other hand, the valve seat ring 50 is formed of titanium or stainless steel material and the surface is processed by precision grinding to corrode when passing the exhaust gas containing the wet particulate matter during the opening and closing operation of the opening and closing plate 40 It is possible to reduce, and to prevent the leakage of the exhaust gas by eliminating the damage caused by the corrosion of the opening and closing plate 40 in contact with the exhaust pipe 10 and the valve seat ring 50 for the flow of the exhaust gas.

In addition, if the valve seat ring 50 is damaged or deformed or corrosion progresses over a long period of time, only the valve seat ring 50 except for the exhaust pipe 10 and other parts can be replaced, thereby replacing parts. This is easy and the parts can be used economically.

As described above, the present invention is installed in the exhaust pipe 10 of the diesel soot filter device while eliminating the existing valve seat portion that can be sealed to contact the opening and closing plate 40 to control the exhaust gas while rotating the valve seat ring ( By attaching 50) to the stepped groove 12 formed in the through-hole 11 of the exhaust pipe 10 as a separate part, the leakage of the exhaust gas is significantly reduced by significantly reducing the corrosion of the wet particulate matter accumulated by the flow of the exhaust gas. It is a useful design to increase the regeneration efficiency of the filter medium by preventing the use, belt seating parts can be used for a long time, and to extend the life of other parts according to the replacement parts.

Claims (2)

In the exhaust pipe 10 to control the flow of the exhaust gas through the through-hole 11 by opening and closing the opening and closing plate 40 connected to the rotating rod 30 by rotating the rotary shaft 20 by high pressure air or vacuum, the exhaust pipe A circular stepped groove 12 having a larger diameter than the through hole 11 is formed in the lower part of the through hole 11, and the stepped groove 12 is connected to one side of the opening and closing plate 40 so as to be in contact with each other. Valve seat ring is applied for valve soot filtering device, characterized in that the valve seat ring (50) having a flat side. The valve according to claim 1, wherein the valve seat ring (50) is made of titanium or stainless steel.