Exhaust heat preservation protection system based on heat energy recovery

Abstract

The invention discloses a heat preservation and protection system for exhaust based on heat energy recovery, and relates to the technical field of automobile exhaust. The device comprises an exhaust treatment device, a heat preservation system, a protection system and a backflow connecting pipe, the exhaust treatment device comprises an outer shell, a three-way catalyst and a particle catcher are arranged on the front portion and the rear portion in the outer shell correspondingly, and the front end and the rear end of the outer shell are connected with an air inlet end pipe and an exhaust end pipe correspondingly; and one end of the backflow connecting pipe is welded and fixed with the outer shell and is communicated with a space between the three-way catalyst and the particle catcher. The novel heat preservation system and the novel protection system are designed and can be compactly installed on the device shell, the heat preservation system can completely cover so that the heat preservation capacity can be improved, the protection system can efficiently protect all protection points of the device, and the protection capacity is improved; and meanwhile, the device can be combined with a differential pressure pipe on the pressure sensor for assembly and heat insulation protection, and has the advantages of wide coverage rate, compact structure and small occupied space.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile exhaust, and in particular relates to an exhaust heat preservation and protection system based on heat energy recovery. Background Art

[0002] Automobile exhaust carries a relatively high temperature, and if the temperature is recovered for heat energy, it can have the advantages of improving engine efficiency and reducing fuel consumption. Heat recovery requires taking a pipe on the device shell for heat exchange or reflux. With the arrangement of oxygen sensors, pressure sensors and temperature sensors on the device, the shell surface is not a whole plane, which will occupy a larger installation space. Since the installation position of the exhaust treatment device is relatively limited, it will be difficult to install, dismantle and maintain, and there are high requirements for its thermal insulation and protection of components.

[0003] Therefore, it is a problem that the personnel in this field need to solve to design an automobile exhaust and thermal insulation protection system which has a compact structure, occupies a small space and can provide efficient thermal insulation and physical protection. Summary of the invention

[0004] The purpose of the present invention is to provide an exhaust gas insulation and protection system based on heat energy recovery. By designing a new insulation system and protection system, it can be compactly installed on the device casing. The insulation system can completely cover the device to improve the insulation capacity. The protection system can effectively protect each protection point of the device and improve the protection capacity. At the same time, it can be combined with the pressure differential tube on the pressure sensor for assembly and thermal insulation protection, and has the advantages of wide coverage, compact structure and small space occupation.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions: The present invention is an exhaust heat preservation and protection system based on heat energy recovery, comprising an exhaust treatment device, a heat preservation system, a protection system and a reflux pipe, wherein the exhaust treatment device comprises an outer shell, a three-way catalyst and a particle trap are respectively arranged at the front and rear ends of the outer shell, and an intake end pipe and an exhaust end pipe are respectively connected at the front and rear ends of the outer shell; One end of the reflux pipe is welded and fixed to the outer shell and communicates with the space between the three-way catalyst and the particulate trap, and the other end of the reflux pipe is connected to an external pipe through a hose, and a flange is provided at the end of the external pipe; The heat preservation system comprises a front heat preservation cover and a rear heat preservation cover, wherein the front heat preservation cover is sleeved on the air inlet end pipe and the front peripheral side of the outer shell, and the rear heat preservation cover is sleeved on the exhaust end pipe and the peripheral side of the outer shell, and the front heat preservation cover and the rear heat preservation cover are fitted at opposite ends, and the front heat preservation cover and the rear heat preservation cover are filled with heat preservation cotton between the outer shell; The rear heat preservation cover is provided with a first clearance opening, and the connection point between the reflux pipe and the outer shell is located in the first clearance opening; The protection system includes a rear guard plate, a front inner guard plate and a front outer guard plate; The rear guard plate is fixed to the exhaust end pipe by a plurality of first brackets and on the same side as the external pipe, the front inner guard plate is fixed to one side of the intake end pipe by a plurality of second brackets, the front inner guard plate covers half of the intake end pipe, and the front outer guard plate is fixed to the other side of the intake end pipe by a plurality of third brackets, the front outer guard plate covers the other half of the intake end pipe.

[0006] Furthermore, a rear pressure sensor is provided on the exhaust end pipe, a front pressure sensor and a rear oxygen sensor interface are provided in the middle of the outer shell, and a front oxygen sensor interface is provided on the intake end pipe.

[0007] Furthermore, the rear guard plate is provided with a first notch opposite to the position of the rear pressure sensor, and the front inner guard plate and the front outer guard plate are both provided with a second notch opposite to the position of the front oxygen sensor interface.

[0008] Furthermore, the first bracket, the second bracket and the third bracket are all inverted U-shaped brackets or Z-shaped brackets; A plurality of said first brackets are fixed on the same side of the exhaust end pipe; A plurality of said second brackets are fixed on the same side of the air inlet end pipe; The plurality of third brackets are divided into two groups, one group of the third brackets is fixed on the other side of the intake end pipe, the front heat insulation cover is provided with a recessed area near one end of the rear heat insulation cover, and the other group of the third brackets is fixed on the outer shell and is located in the recessed area.

[0009] Furthermore, a main mounting seat and a sub-mounting seat are provided on the outer shell, a side mounting seat is provided on the exhaust end pipe, a second yielding opening cooperating with the main mounting seat, the sub-mounting seat and the side mounting seat is provided on the front thermal insulation cover and the rear thermal insulation cover, and a third yielding opening cooperating with the front pressure sensor and the rear oxygen sensor interface is provided on the rear thermal insulation cover.

[0010] Furthermore, the front pressure sensor and the rear pressure sensor are both connected to a pressure differential measuring tube, a tube clamp is fixed to the outside of the front outer guard plate, the two pressure differential measuring tubes are fixed to the front outer guard plate through the tube clamp, and the connection between the tube clamp and the third bracket and the front outer guard plate shares the same fastener.

[0011] Furthermore, the front heat-insulating cover and the rear heat-insulating cover are each composed of two symmetrically arranged half-cover bodies, and a folded edge is provided on one side where the two half-cover bodies are connected, and the two half-cover bodies are connected to each other by folding the folded edges.

[0012] Furthermore, the edges of the front and rear heat insulation covers away from the folded edges, the inner edges of the first, second and third clearance openings are all provided with inner concave edges in contact with the peripheral side surfaces of the outer shell.

[0013] Furthermore, arc-shaped protective plates are fixed on the return pipe and the external pipe, and heat insulation cotton is provided on the inner side of the arc-shaped protective plates.

[0014] Furthermore, the return pipe and the external pipe are both 90-degree bends, the arc-shaped guard plate on the return pipe is arranged on the outside of the bend of the return pipe, and the arc-shaped guard plate on the external pipe is arranged on the side close to one end of the flange and facing the exhaust end pipe.

[0015] The present invention has the following beneficial effects: The present invention designs a novel thermal insulation system and protection system, which can be compactly installed on the device casing. The thermal insulation system can completely cover the device to improve the thermal insulation capacity. The protection system can effectively protect various protection points of the device to improve the protection capacity. At the same time, it can be combined with the pressure difference tube on the pressure sensor for assembly and thermal insulation protection. It has the advantages of wide coverage, compact structure and small space occupation, which is conducive to installation, disassembly and maintenance, and improves the structural compactness and service life of the exhaust gas treatment device.

[0016] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of an exhaust gas thermal insulation protection system based on heat energy recovery of the present invention; Figure 2 It is a structural schematic diagram of the present invention from another side perspective; Figure 3 This is a schematic diagram of the structure of the present invention after removing the protection system; In the accompanying drawings, the components represented by the reference numerals are listed as follows: 1-outer shell, 2-intake end pipe, 3-exhaust end pipe, 4-return pipe, 5-front insulation cover, 6-rear insulation cover, 7-rear guard plate, 8-front inner guard plate, 9-front outer guard plate, 10-first bracket, 11-second bracket, 12-rear pressure sensor, 13-front pressure sensor, 14-rear oxygen sensor interface, 15-front oxygen sensor interface, 16-pressure difference measuring tube, 17-tube clamp, 18-main mounting seat, 19-second mounting seat, 20-side mounting seat, 21-second clearance port, 22-arc guard plate, 23-third clearance port, 24-third bracket, 401-hose, 402-external pipe, 403-flange, 501-clearance concave area, 502-folded edge, 503-inner concave edge, 601-first clearance port, 701-first notch, 801-second notch. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1-3 As shown, the present invention is an exhaust heat preservation and protection system based on heat energy recovery, comprising an exhaust treatment device, a heat preservation system, a protection system and a reflux pipe 4, the exhaust treatment device comprises an outer shell 1, a three-way catalyst and a particulate trap are respectively arranged inside the outer shell 1, and the front and rear ends of the outer shell 1 are respectively connected to an intake end pipe 2 and an exhaust end pipe 3; One end of the reflux pipe 4 is welded and fixed to the outer shell 1 and communicates with the space between the three-way catalyst and the particulate trap. The other end of the reflux pipe 4 is connected to an external pipe 402 through a hose 401. A flange 403 is provided at the end of the external pipe 402. The heat preservation system includes a front heat preservation cover 5 and a rear heat preservation cover 6. The front heat preservation cover 5 is sleeved on the air inlet end pipe 2 and the front peripheral side of the outer shell 1. The rear heat preservation cover 6 is sleeved on the exhaust end pipe 3 and the peripheral side of the outer shell 1. The front heat preservation cover 5 and the rear heat preservation cover 6 are fitted at opposite ends. The front heat preservation cover 5 and the rear heat preservation cover 6 are filled with heat preservation cotton between the outer shell 1. A first clearance opening 601 is provided on the rear heat preservation cover 6, and the connection point between the return pipe 4 and the outer shell 1 is located in the first clearance opening 601; The protection system includes a rear guard plate 7, a front inner guard plate 8 and a front outer guard plate 9; The rear guard plate 7 is fixed to the exhaust end pipe 3 and on the same side as the external pipe 402 through a plurality of first brackets 10, the front inner guard plate 8 is fixed to one side of the intake end pipe 2 through a plurality of second brackets 11, and the front inner guard plate 8 covers half of the intake end pipe 2, and the front outer guard plate 9 is fixed to the other side of the intake end pipe 2 through a plurality of third brackets 24, and the front outer guard plate 9 covers the other half of the intake end pipe 2.

[0021] Among them Figure 1-3 As shown, a rear pressure sensor 12 is provided on the exhaust end pipe 3 , a front pressure sensor 13 and a rear oxygen sensor interface 14 are provided in the middle of the outer shell 1 , and a front oxygen sensor interface 15 is provided on the intake end pipe 2 .

[0022] Among them Figure 1-3 As shown, the rear guard plate 7 is provided with a first notch 701 opposite to the position of the rear pressure sensor 12 , and the front inner guard plate 8 and the front outer guard plate 9 are both provided with a second notch 801 opposite to the position of the front oxygen sensor interface 15 .

[0023] Among them Figure 1-3 As shown, the first bracket 10, the second bracket 11 and the third bracket 24 are all inverted U-shaped brackets or Z-shaped brackets; A plurality of first brackets 10 are fixed on the same side of the exhaust end pipe 3; A plurality of second brackets 11 are fixed on the same side of the intake end pipe 2; The plurality of third brackets 24 are divided into two batches, one batch of third brackets 24 is fixed on the other side of the intake end pipe 2, and a recessed area 501 is provided at one end of the front heat preservation cover 5 close to the rear heat preservation cover 6, and the other batch of third brackets 24 is fixed on the outer shell 1 and is located in the recessed area 501.

[0024] Among them Figure 1-3 As shown, a main mounting seat 18 and a sub-mounting seat 19 are provided on the outer shell 1, a side mounting seat 20 is provided on the exhaust end pipe 3, a second make way opening 21 cooperating with the main mounting seat 18, the sub-mounting seat 19 and the side mounting seat 20 is provided on the front thermal insulation cover 5 and the rear thermal insulation cover 6, and a third make way opening 23 cooperating with the front pressure sensor 13 and the rear oxygen sensor interface 14 is provided on the rear thermal insulation cover 6.

[0025] Among them Figure 1-3 As shown, the front pressure sensor 13 and the rear pressure sensor 12 are both connected to a differential pressure measuring tube 16, a tube clamp 17 is fixed to the outside of the front outer guard plate 9, the two differential pressure measuring tubes 16 are fixed to the front outer guard plate 9 through the tube clamp 17, and the connection between the tube clamp 17 and the third bracket 24 and the front outer guard plate 9 shares the same fastener.

[0026] Among them Figure 3As shown, the front heat-insulating cover 5 and the rear heat-insulating cover 6 are both composed of two symmetrically arranged half-cover bodies, and a folded edge 502 is provided on one side where the two half-cover bodies are connected to each other, and the two half-cover bodies are connected to each other by folding the folded edge 502.

[0027] Among them Figure 1-3 As shown, the edges of the front heat insulation cover 5 and the rear heat insulation cover 6 away from the folded edge 502, the inner edge of the first make way opening 601, the inner edge of the second make way opening 21 and the inner edge of the third make way opening 23 are all provided with inner concave edges 503 that are in contact with the side surface of the outer shell 1.

[0028] Among them Figure 1-3 As shown, an arc-shaped guard plate 22 is fixed on both the return pipe 4 and the external pipe 402 , and heat insulation cotton is provided on the inner side of the arc-shaped guard plate 22 .

[0029] Among them Figure 1-3 As shown, the return pipe 4 and the external pipe 402 are both 90-degree bends. The arc-shaped guard plate 22 on the return pipe 4 is arranged on the outside of the bend of the return pipe 4, and the arc-shaped guard plate 22 on the external pipe 402 is arranged on one side close to the flange 403 and facing the exhaust end pipe 3.

[0030] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0031] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An exhaust heat preservation and protection system based on heat energy recovery, comprising an exhaust treatment device, a heat preservation system and a protection system, wherein the exhaust treatment device comprises an outer shell (1), a three-way catalyst and a particulate trap are respectively arranged at the front and rear of the outer shell (1), and an intake end pipe (2) and an exhaust end pipe (3) are respectively connected to the front and rear ends of the outer shell (1), characterized in that: It also includes a return pipe (4); One end of the reflux pipe (4) is welded and fixed to the outer shell (1) and communicates with the space between the three-way catalyst and the particulate trap, and the other end of the reflux pipe (4) is connected to an external pipe (402) via a hose (401), and a flange (403) is provided at the end of the external pipe (402); The heat preservation system comprises a front heat preservation cover (5) and a rear heat preservation cover (6), wherein the front heat preservation cover (5) is sleeved on the air inlet end pipe (2) and the front peripheral side surface of the outer shell (1), and the rear heat preservation cover (6) is sleeved on the exhaust end pipe (3) and the peripheral side surface of the outer shell (1), and the front heat preservation cover (5) and the rear heat preservation cover (6) have opposite end surfaces in contact with each other, and the front heat preservation cover (5) and the rear heat preservation cover (6) are filled with heat preservation cotton between the outer shell (1); The rear heat-insulating cover (6) is provided with a first clearance opening (601), and the connection point between the return pipe (4) and the outer shell (1) is located inside the first clearance opening (601); The protection system comprises a rear guard plate (7), a front inner guard plate (8) and a front outer guard plate (9); The rear guard plate (7) is fixed to the exhaust end pipe (3) and on the same side as the external pipe (402) through a plurality of first brackets (10); the front inner guard plate (8) is fixed to one side of the intake end pipe (2) through a plurality of second brackets (11); the front inner guard plate (8) covers half of the intake end pipe (2); the front outer guard plate (9) is fixed to the other side of the intake end pipe (2) through a plurality of third brackets (24); the front outer guard plate (9) covers the other half of the intake end pipe (2).

2. The exhaust gas insulation protection system based on heat energy recovery according to claim 1 is characterized in that: The exhaust end pipe (3) is provided with a rear pressure sensor (12), the middle portion of the outer shell (1) is provided with a front pressure sensor (13) and a rear oxygen sensor interface (14), and the intake end pipe (2) is provided with a front oxygen sensor interface (15).

3. The exhaust gas insulation protection system based on heat recovery according to claim 2 is characterized in that: The rear guard plate (7) is provided with a first notch (701) opposite to the position of the rear pressure sensor (12), and the front inner guard plate (8) and the front outer guard plate (9) are both provided with a second notch (801) opposite to the position of the front oxygen sensor interface (15).

4. The exhaust gas insulation protection system based on heat energy recovery according to claim 2 is characterized in that: The first bracket (10), the second bracket (11) and the third bracket (24) are all inverted U-shaped brackets or Z-shaped brackets; A plurality of the first brackets (10) are fixed on the same side of the exhaust end pipe (3); A plurality of the second brackets (11) are fixed on the same side of the air intake end pipe (2); The plurality of third brackets (24) are divided into two groups, one group of the third brackets (24) is fixed to the other side of the air intake end pipe (2), and a recessed area (501) is provided at one end of the front heat insulation cover (5) close to the rear heat insulation cover (6), and the other group of the third brackets (24) is fixed to the outer shell (1) and is located in the recessed area (501).

5. The exhaust gas insulation protection system based on heat recovery according to claim 2 is characterized in that: The outer shell (1) is provided with a main mounting seat (18) and a secondary mounting seat (19), the exhaust end pipe (3) is provided with a side mounting seat (20), the front heat insulation cover (5) and the rear heat insulation cover (6) are provided with a second clearance opening (21) that cooperates with the main mounting seat (18), the secondary mounting seat (19) and the side mounting seat (20), and the rear heat insulation cover (6) is provided with a third clearance opening (23) that cooperates with the front pressure sensor (13) and the rear oxygen sensor interface (14).

6. The exhaust gas insulation protection system based on heat energy recovery according to claim 4 is characterized in that: The front pressure sensor (13) and the rear pressure sensor (12) are both connected to a differential pressure measuring tube (16); a tube clamp (17) is fixed to the outside of the front outer guard plate (9); the two differential pressure measuring tubes (16) are fixed to the front outer guard plate (9) via the tube clamp (17); the connection between the tube clamp (17) and the third bracket (24) and the front outer guard plate (9) uses the same fastener.

7. The exhaust gas insulation protection system based on heat energy recovery according to claim 5 is characterized in that: The front heat-insulating cover (5) and the rear heat-insulating cover (6) are both composed of two symmetrically arranged half-cover bodies, and a folded edge (502) is provided on one side where the two half-cover bodies are connected, and the two half-cover bodies are connected to each other by folding the folded edge (502).

8. The exhaust gas insulation protection system based on heat energy recovery according to claim 7 is characterized in that: The edges of the front heat-insulating cover (5) and the rear heat-insulating cover (6) away from the folded edge (502), the inner edge of the first clearance opening (601), the inner edge of the second clearance opening (21), and the inner edge of the third clearance opening (23) are all provided with inner concave edges (503) that are in contact with the peripheral side surface of the outer shell (1).

9. The exhaust gas insulation protection system based on heat energy recovery according to claim 1 is characterized in that: The return pipe (4) and the external pipe (402) are both fixed with an arc-shaped protective plate (22), and the inner side of the arc-shaped protective plate (22) is provided with heat insulation cotton.

10. The exhaust gas insulation protection system based on heat energy recovery according to claim 9, characterized in that: The return pipe (4) and the external pipe (402) are both 90-degree bend pipes; the arc-shaped guard plate (22) on the return pipe (4) is arranged on the outside of the bend of the return pipe (4); and the arc-shaped guard plate (22) on the external pipe (402) is arranged on a side close to one end of the flange (403) and facing the exhaust end pipe (3).

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