CN211500754U

CN211500754U - Detachable DPF sealing structure

Info

Publication number: CN211500754U
Application number: CN201922231530.8U
Authority: CN
Inventors: 张旭; 何龙; 陈增响; 付细平; 何伟娇; 马相雪
Original assignee: Wuxi Weifu Lida Catalytic Converter Co Ltd
Current assignee: Wuxi Weifu Lida Catalytic Converter Co Ltd
Priority date: 2019-12-12
Filing date: 2019-12-12
Publication date: 2020-09-15
Anticipated expiration: 2029-12-12

Abstract

The utility model belongs to the technical field of diesel engine tail gas after-treatment equipment, and relates to a detachable DPF sealing structure, which comprises a shell component and a DPF component arranged in the shell component in a matching way; the shell assembly comprises an outer barrel, a fixing flange is fastened at the tail end of the outer barrel, a gasket is arranged in the outer barrel by adhering the fixing flange, a circle of pit is arranged on the surface of the tail end of the outer barrel, and the axial other end of the outer barrel is sequentially connected with an end cover and an inner side flanging shell; the DPF assembly comprises an inner cylinder body, a DPF carrier is arranged in the inner cylinder body, a sealing flange is fixed at the tail end of the inner cylinder body, the front end surface of the inner cylinder body is fixedly connected with one end of a support, the other end of the support is fixedly connected with an outer flanging shell, and a dismounting support is fixed on the outer flanging shell; when the DPF assembly is matched and arranged in the shell assembly, the inner barrel is radially positioned through the concave pits, the sealing flange is pressed on the gasket, and the outer side flanging shell and the inner side flanging shell are locked through the hoop. The structure can be quickly disassembled and has reliable sealing performance.

Description

Detachable DPF sealing structure

Technical Field

The utility model belongs to the technical field of diesel engine tail gas after treatment facility, a can dismantle DPF seal structure is related to.

Background

Dpf (diesel Particulate filter) diesel Particulate filter: the DPF is a device, which is installed in an exhaust system of a diesel vehicle and reduces Particulate Matter (PM) in exhaust gas by filtration.

Airtightness: refers to the sealing performance of the device or container.

The DPF is capable of effectively purifying 70% to 90% of the particulates in the exhaust gas, and is one of the most effective and direct methods for purifying diesel particulate matter. Commercialization has been achieved internationally.

The DPF is installed on the exhaust pipe of the diesel engine, and PM is adsorbed and filtered by the filter element when exhaust passes through the DPF. However, as the working time increases, PM in the filter element increases, which causes the exhaust back pressure to rise, and affects the power economy of the diesel engine. Removal of PM from the filter element is referred to as regeneration of the DPF. The biggest challenge facing DPFs is the regeneration problem.

With the upgrading of the emission standard of the diesel engine, the gas emission can not meet the requirements of the regulations simply by optimizing the diesel engine, so that the aftertreatment device becomes an important component for controlling the pollutant emission of the diesel engine.

The Diesel Particulate Filter (DPF) is one of the most practical and effective particulate post-treatment technologies recognized internationally at present, and a DPF system generally comprises a filtering device, a regenerating device and a control device, wherein one of the key technologies is filter regeneration. The diesel engine particle catcher is used for introducing tail gas of a diesel engine into a special post-processing device, catching and concentrating particles in the exhaust gas, preventing the particles from being discharged outside the diesel engine, decomposing and burning the particles by using a catalyst, an oxidizer, a combustor and the like, and removing most particles in the particles, thereby reducing the particle emission. The device can reduce harmful particles in the diesel engine by 70-90%, and most of particles are filtered out by the filter body, so that the purpose of purifying tail gas is achieved. However, as the filter body is accumulated over time, particles are deposited in the pores of the filter body, which increases exhaust resistance, resulting in deterioration of engine performance. In order for the particle trap to function properly without becoming clogged, the particle trap must be periodically cleaned of particles, which is called regeneration. During the regeneration process, the particles collected by the particle catcher can be burnt, so the key of the technology lies in the selection of the filtering material and the regeneration technology.

No matter what kind of regeneration technique is adopted, the DPF carrier in the DPF system all needs regularly to take out from the system, clears up the ash content, and consequently the DPF carrier needs easily to dismantle and has reliable gas tightness, the utility model discloses it is just proposed based on the structure principle that DPF easily dismantled.

Disclosure of Invention

The utility model provides a to above-mentioned problem, a can dismantle DPF seal structure is provided, and this structure can be dismantled fast, has reliable sealing performance simultaneously.

According to the technical scheme of the utility model: the utility model provides a can dismantle DPF seal structure which characterized in that: the DPF assembly is arranged in the shell assembly in a matched mode;

the shell assembly comprises an outer barrel, a fixing flange is fastened at the tail end of the outer barrel, a gasket is arranged in the outer barrel by adhering the fixing flange, a circle of pit is arranged on the surface of the tail end of the outer barrel, and the axial other end of the outer barrel is sequentially connected with an end cover and an inner side flanging shell;

the DPF assembly comprises an inner cylinder body, a DPF carrier is arranged in the inner cylinder body, a sealing flange is fixed at the tail end of the inner cylinder body, the front end surface of the inner cylinder body is fixedly connected with one end of a support, the other end of the support is fixedly connected with an outer flanging shell, and a dismounting support is fixed on the outer flanging shell;

when the DPF assembly is matched and arranged in the shell assembly, the inner barrel is radially positioned through the concave pits, the sealing flange is pressed on the gasket, and the outer side flanging shell and the inner side flanging shell are locked through the hoop.

As a further improvement of the utility model, the shell comprises an inner end cover and an outer end cover which are connected in a fastening matching way.

As the utility model discloses a further improvement, inner barrel surface fixed equipartition welding a plurality of support, the one end of support are equipped with the outsourcing sideboard, and the outsourcing sideboard laminating is in interior barrel surface to welded fastening, the other end hem structure and the outside turn-ups casing welded fastening of support.

As a further improvement, the inner wall of staple bolt is provided with the locking groove, and the edge of inboard turn-ups casing, outside turn-ups casing sets up in the locking groove of staple bolt to it is fixed to lock.

As a further improvement, the medial extremity is covered and is provided with two through-holes, and the through-hole that sets up upper portion is covered to the outside end and is aligned with the through-hole on interior end cap upper portion and cooperate, and the through-hole that medial extremity covered lower part is covered to the closed plate body structure of outside end cap lower part.

The technical effects of the utility model reside in that: the utility model has simple operation, can realize the quick disassembly of the DPF, reduce the disassembly time of the DPF and improve the efficiency; the sealing device has reliable sealing performance, and ensures the reliability and stability of sealing; has certain cost advantage.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a cross-sectional view of fig. 1.

Fig. 3 is a perspective view of fig. 1.

Fig. 4 is an explosion diagram of the present invention.

Fig. 5 is an exploded view of the present invention.

Fig. 6 is a schematic structural diagram of the DPF assembly of the present invention.

Fig. 7 is a schematic structural diagram of the middle housing assembly of the present invention.

Detailed Description

The following description will further describe embodiments of the present invention with reference to the accompanying drawings.

In fig. 1 to 7, the DPF filter comprises an outer cylinder 1, a fixing flange 2, a gasket 3, a sealing flange 4, an inner cylinder 5, a DPF carrier 6, a bracket 7, an inner end cover 8, an outer end cover 9, an inner flanging shell 10, an outer flanging shell 11, a detachable bracket 12, a hoop 13, a DPF component 14, a shell component 15, and the like.

As shown in fig. 4 and 5, in order to realize the utility model discloses convenient and fast carries out dismouting operation, including casing assembly 15, DPF component 14 and staple bolt 13, staple bolt 13's main function is the inboard turn-ups casing 10 of locking and outside turn-ups casing 11, guarantees DPF component 14 and casing assembly 15's sealed.

Fig. 1~7 show DPF component 14 structure, in operation, conveniently take out through the pull mode, it includes interior barrel 5, DPF carrier 6, sealing flange 4, support 7, outside turn-ups casing 11, dismantle support 12, place in barrel 5 in DPF carrier 6, and compress tightly fixedly, guarantee that DPF carrier 6 is fixed in inside barrel 5, the tail end welding sealing flange 4 of interior barrel 5, the three support 7 of other end surface equipartition welding of interior barrel 5, the other end welding outside turn-ups casing 11 of three support 7, welding dismantlement support 12 on the outside turn-ups casing 11.

Fig. 7 shows the housing assembly 15 with the housing assembly 15 as a fixed mechanism, and in operation the DPF assembly 14 is able to move in extension relative to the housing assembly 15. The shell assembly 15 comprises an outer cylinder 1, a fixing flange 2, a gasket 3, an inner end cover 8, an outer end cover 9 and an inner flanging shell 10, wherein the fixing flange 2 is welded at the tail end of the outer cylinder 1, the gasket 3 is arranged in the outer cylinder 1 and tightly attached to the fixing flange 2, the inner end cover 8 is fixed at the other axial end of the outer cylinder 1, the outer end cover 9 is connected with the inner end cover 8 in a covering manner, two through holes are formed in the inner end cover 8, a through hole is formed in the outer end cover 9 and is coaxial with one through hole in the inner end cover 8, a sealing plate body part on the outer end cover 9 covers the other through hole in the inner end cover 8, and the inner flanging shell 10 is connected with the outer end cover 9.

As shown in fig. 5: when the DPF assembly 14 needs to be disassembled, the fastening hoop 13 is firstly disassembled, the disassembling bracket 12 is pulled, the DPF assembly 14 is pulled to be separated from the casing assembly 15, and at this time, the DPF assembly 14 is integrally pulled out from the casing assembly 15.

After the DPF assembly 14 is serviced, the DPF assembly 14 is installed into the housing assembly 15. During installation: when the DPF assembly 14 shown in fig. 6 is installed in the casing assembly 15 shown in fig. 7, the sealing flange 4 on the DPF assembly 14 is tightly pressed on the fixing flange 2 of the casing assembly 15, wherein the gasket 3 has a sealing function, tightly holds the hoop 13 after being tightly pressed, the inner flanging casing 10 and the outer flanging casing 11 are fixed under the clamping function of the hoop 13, so that the sealing flange 4 on the DPF assembly 14 is tightly pressed on the fixing flange 2 of the casing assembly 15, and further the sealing between the DPF assembly 14 and the casing assembly 15 is ensured, so that exhaust gas flows through the inside of the DPF, then flows rightwards to a region sealed by the inner end cover 8, the outer end cover 9 and the hoop 13, and then flows downwards, flows out of the DPF sealing structure from a hole at the lower part of the inner end cover 8 to the left, and flows to a next-stage carrier.

In order to realize the effective supporting effect on the inner cylinder body 5, a pit is further arranged on the outer cylinder body 1, the minimum diameter of the pit is smaller than the diameter of the inner cylinder body 5, the fit at the position is interference fit, and the pit plays a role in supporting the inner cylinder body 5.

The diameter difference between the outer cylinder body 1 and the inner cylinder body 5 is larger than 10mm, so that the DPF assembly 14 can be smoothly detached. DPF subassembly 14 is integral pull structure, and DPF subassembly 14 wholly breaks away from 15 parts of casing subassembly, the utility model discloses an internal seal is sealed by mounting flange 2, gasket 3, sealing flange 4, and external seal is sealed by staple bolt 13.

The support 7 is used for connecting the inner cylinder 5 and the outer flanging shell 11, the inner side of the inner cylinder 5 is connected with the DPF carrier 6, and the left side of the inner cylinder 5 is connected with the sealing flange 4. Meanwhile, the dismounting support 12 is connected with the outer flanging shell 11, and when the dismounting support 12 is pulled to dismount, the outer flanging shell 11, the inner cylinder 5 and the DPF assembly 14 can be dismounted together. During installation, the hoop holds the outer flanging shell 11 and the inner flanging shell 10 tightly, then the inner flanging shell compresses the support 7 and the DPF inner cylinder inwards, and then the sealing flange 4 is compressed on the fixing flange 2 and is sealed by the gasket 3. The air flow is ensured to enter the inner cylinder body from the left side of the DPF and completely passes through the filtering action of the DPF carrier.

Claims

1. The utility model provides a can dismantle DPF seal structure which characterized in that: the DPF assembly comprises a shell assembly (15) and a DPF assembly (14) which is arranged in the shell assembly (15) in a matching mode;

the shell assembly (15) comprises an outer barrel (1), a fixed flange (2) is fastened at the tail end of the outer barrel (1), a gasket (3) is arranged in the outer barrel (1) in a manner of being attached to the fixed flange (2), a circle of concave pit is formed in the surface of the tail end of the outer barrel (1), and the other axial end of the outer barrel (1) is sequentially connected with an end cover and an inner flanging shell (10);

the DPF assembly (14) comprises an inner cylinder body (5), a DPF carrier (6) is arranged in the inner cylinder body (5), a sealing flange (4) is fixed at the tail end of the inner cylinder body (5), the front end surface of the inner cylinder body (5) is fixedly connected with one end of a support (7), the other end of the support (7) is fixedly connected with an outer flanging shell (11), and a dismounting support (12) is fixed on the outer flanging shell (11);

when DPF subassembly (14) cooperation set up in casing subassembly (15), interior barrel (5) are through pit radial positioning, and sealing flange (4) compress tightly on gasket (3), and outside turn-ups casing (11) pass through staple bolt (13) with inboard turn-ups casing (10) and lock.

2. The removable DPF sealing structure of claim 1, wherein: the shell comprises an inner end cover (8) and an outer end cover (9) which are connected in a fastening fit mode.

3. The removable DPF sealing structure of claim 1, wherein: a plurality of supports (7) are uniformly welded on the surface of the inner barrel (5), an outer edge covering plate is arranged at one end of each support (7), the outer edge covering plate is attached to the outer surface of the inner barrel (5) and is welded and fixed, and the other end edge folding structure of each support (7) is welded and fixed with the outer side edge folding shell (11).

4. The removable DPF sealing structure of claim 1, wherein: the inner wall of the hoop (13) is provided with a locking groove, and the edges of the inner side flanging shell (10) and the outer side flanging shell (11) are arranged in the locking groove of the hoop (13) and are locked and fixed.

5. The removable DPF sealing structure of claim 2, wherein: two through holes are formed in the inner side end cover (8), the through hole formed in the upper portion of the outer side end cover (9) is aligned and matched with the through hole formed in the upper portion of the inner side end cover (8), and the through hole formed in the lower portion of the inner side end cover (8) is covered by the sealing plate body structure on the lower portion of the outer side end cover (9).