CN217652820U - Exhaust pipe heat insulation structure, engine and agricultural equipment - Google Patents

Abstract

The utility model relates to a blast pipe thermal-insulated structure, engine and agricultural machinery equipment belongs to engine technical field, has solved the long problem of thermal-insulated cover installation time, and blast pipe thermal-insulated structure is made by flexible thermal insulation material, including last parcel, lower parcel and the side parcel that sets up between last parcel and lower parcel, go up the parcel, parcel and side parcel constitute the uncovered setting in one side that is used for holding the cavity of exhaust manifold and a plurality of manifold down, and the tip that goes up parcel and parcel position in uncovered side down all is equipped with and is used for thermal-insulated structure of blast pipe and the fixed part of engine, adopts the utility model discloses a thermal-insulated structure, man-hour is few, and is efficient.

Description

Exhaust pipe heat insulation structure, engine and agricultural machinery equipment

Technical Field

The utility model relates to an engine technical field, concretely relates to blast pipe heat insulation structure, engine and agricultural machinery equipment.

Background

The statements herein merely provide background related to the present disclosure and may not necessarily constitute prior art.

In the prior art, when the flexible heat insulation material is coated, each manifold and an exhaust main pipe on the exhaust pipe are respectively coated; the inventor finds that the upper side and the lower side of the wrapped inner side of the exhaust main pipe are connected by adopting the drawstrings due to the influence of the manifolds and the reinforcing ribs, the wrapping of each manifold is difficult due to the structural and space limitations of an engine, and when the exhaust main pipe is wrapped by adopting the drawstrings, the installation and tensioning of the drawstrings are difficult, so that the production rhythm is seriously influenced, and the exhaust pipe flange cannot be completely wrapped without leaks; because the manifold and the exhaust main pipe are respectively wrapped, the lap joint of the heat-insulating material wrapped by the manifold and the heat-insulating material wrapped by the exhaust main pipe cannot ensure no leak, and the fire risk still exists; each manifold is wrapped with a relatively large amount of insulation material and at a relatively high cost, and therefore, in summary, the prior art has the following disadvantages:

1) The installation is difficult, the installation time is more, and the production rhythm is influenced;

2) The heat insulation material has more materials and relatively higher cost;

3) The exhaust pipe cannot be completely wrapped (without seam leakage), the contact between the fragments and the exhaust pipe cannot be completely eliminated, and a high ignition risk is still caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the not enough of above-mentioned prior art, provide a blast pipe thermal-insulated structure, can realize the complete parcel to the blast pipe, thoroughly stop the possibility that piece and blast pipe contacted, can shorten the man-hour of installation simultaneously, reduce the production rhythm.

In order to realize the purpose, the utility model adopts the following technical scheme:

in a first aspect, embodiments of the present invention provide a thermal insulation structure for exhaust pipe, made of flexible thermal insulation material, including upper wrapping portion, lower wrapping portion and side wrapping portion between upper wrapping portion and lower wrapping portion, upper wrapping portion, lower wrapping portion and side wrapping portion constitute the open setting in one side of cavity and cavity that is used for holding house steward and a plurality of manifolds, and the tip that upper wrapping portion and lower wrapping portion are located the uncovered side all is equipped with and is used for thermal insulation structure and the fixed part of engine with the exhaust pipe.

Optionally, the upper wrapping portion or the side wrapping portion is provided with a through hole through which the connecting elbow between the main pipe and the supercharger passes, the elbow wrapping portion is arranged at the through hole, and the elbow wrapping portion is provided with a cavity for accommodating the connecting elbow and a flange plate at the end of the connecting elbow.

Optionally, two side end faces of the side wrapping portion are arranged non-flush so that one side end portion of the side wrapping portion can extend to a cylinder head side end portion of the engine and wrap the one side end portion of the cylinder head.

Optionally, the flexible heat insulation material is made of heat insulation cotton and comprises a stainless steel wire mesh, glass fiber cloth or high silica fiber cloth, glass fiber cotton, silica gel cloth or aluminum foil cloth which are sequentially arranged from inside to outside.

Optionally, the side parts of the two sides of the side wrapping part are provided with hooks.

In a second aspect, an embodiment of the present invention provides an engine, provided with the first aspect the exhaust pipe heat insulation structure, the exhaust manifold and the manifold of the exhaust pipe are located in the cavity formed by the upper wrapping part, the lower wrapping part and the side wrapping part, and the upper wrapping part and the lower wrapping part are all fixed with the casing of the engine through the fixing part.

Optionally, the fixing part connected to the upper wrapping part is folded and plugged into a space between an intake pipe and an exhaust pipe of the engine.

Optionally, still include the iron wire, the iron wire contacts with the fixed part that last parcel portion is connected and its two tip are connected with the casing of engine, and the iron wire compresses tightly the space between intake pipe and blast pipe with the fixed part after the folding that last parcel portion is connected.

Optionally, the fixing portion connected to the lower wrapping portion is attached to a housing of the engine and is pressed against the surface of the housing of the engine through the pressing plate.

Optionally, the pressure plate is provided with a fixing plate, and the fixing plate is fixed to the housing of the engine through a locking member.

Optionally, the fixed part that the upper wrapping part is connected and the fixed part that lower wrapping part is connected are all pre-buried to have the iron wire, and the tip of iron wire stretches out to the fixed part outside and is connected with engine case, and the iron wire compresses tightly the fixed part on engine case surface.

Optionally, an iron wire is disposed between the two side ends of the side wrapping portion and the housing of the engine.

Optionally, one side end of the side wrapping part extends to the end of the cylinder head and wraps the end of the cylinder head.

In a third aspect, embodiments of the present invention provide an agricultural equipment provided with the engine of the second aspect.

Above-mentioned the utility model has the advantages as follows:

1. the heat insulation structure of the utility model, the upper wrapping part, the lower wrapping part and the side wrapping part form a cavity for accommodating the header pipe and the manifolds, the header pipe and the manifolds are all wrapped into the heat insulation structure after one-time wrapping operation, compared with the traditional header pipe and manifolds which are separately wrapped, the heat insulation structure has the advantages of simple wrapping, less installation working hours, being beneficial to improving the production speed and efficiency,

2. the utility model discloses a thermal-insulated structure owing to adopted monolithic structure, has carried out whole protection to the blast pipe, can follow four directions in the upper and lower, left and right sides and realize the parcel, does not have the overlap joint problem of thermal-insulated material when manifold and exhaust manifold wrap up alone, consequently can not appear the crack, can eliminate the contact of piece and blast pipe completely, the at utmost has reduced the risk of catching fire.

3. The utility model discloses a thermal-insulated structure is owing to adopt the cavity that upper wrapping portion, lower wrapping portion and side wrapping portion constitute to wrap up all manifolds, and every manifold need not parcel alone, and flexible thermal insulation material materials is less, and simple structure, and the cost is lower relatively.

4. The utility model discloses a thermal-insulated structure, the fixed wire has been buried underground in the fixed part, through the fixed wire, can compress tightly the fixed part on the engine surface for thermal-insulated structure laminates with the engine surface completely, has guaranteed the leakproofness, has eliminated the influence of installer human factor simultaneously, more is favorable to producing to guarantee with the product uniformity, and the taut messenger blast pipe thermal-insulated structure of pre-buried iron wire can not be because of engine vibration and engine separation, and the reliability is higher.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.

FIG. 1 is a schematic illustration of a prior art engine exhaust pipe configuration;

FIG. 2 is a schematic diagram of a prior art engine model;

FIG. 3 is a schematic view of another prior art engine;

fig. 4 is a schematic view of the overall structure of embodiment 1 of the present invention;

fig. 5 is a schematic view of the use state of embodiment 1 of the present invention;

fig. 6 is a schematic view of the overall structure of embodiment 2 of the present invention;

fig. 7 is a schematic view of the overall structure of embodiment 2 of the present invention;

fig. 8 is a schematic view of the overall structure of embodiment 3 of the present invention;

fig. 9 is a schematic view of the overall structure of embodiment 4 of the present invention;

fig. 10 is a schematic view of the overall structure of embodiment 4 of the present invention;

the exhaust manifold comprises a manifold 1, an exhaust manifold 2, an upper wrapping portion 3, a lower wrapping portion 4, a side wrapping portion 5, a first portion 5-1, a second portion 5-2, a third portion 5-3, an upper fixing portion 6, a lower fixing portion 7, a fourth portion 8, a fifth portion 9, an air inlet pipe 10, a limiting screw 11, a pressing plate 12, a pressing plate 13, a fixing plate 14, a connecting screw 15, a cylinder cover 16, an engine shell 17, a cylinder cover 18, an upper fixing screw 19, a lower fixing screw 20 and a covering portion 20.

Detailed Description

For convenience of description, the words "up", "down", "left" and "right" in the present invention, if any, merely indicate correspondence with the directions of up, down, left and right of the drawings themselves, and do not limit the structure, but merely facilitate the description of the invention and simplify the description, rather than indicate or imply that the equipment or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the invention.

Example 1

The embodiment provides an exhaust pipe heat insulation structure, as shown in fig. 4-5, which is made of a flexible heat insulation material and used for wrapping an exhaust main pipe and a manifold of an exhaust pipe, so as to prevent debris generated during crop harvesting from falling on the exhaust pipe to cause a burning phenomenon.

The flexible heat insulation material is made of heat insulation cotton, and the heat insulation cotton sequentially comprises a stainless steel wire mesh, glass fiber cloth or high silica fiber cloth, glass fiber cotton, silica gel cloth or aluminum foil cloth from inside to outside.

The blast pipe heat-insulating structure of this embodiment adopts and blast pipe shape assorted cavity structure, the inside cavity of cavity structure is used for holding the exhaust manifold and a plurality of manifold of blast pipe, the uncovered setting in cavity structure one side, during the use, directly detain the blast pipe with air structure from the outside of blast pipe, make the exhaust manifold of blast pipe, the flange of each manifold and manifold tip all is located inside the cavity of cavity structure, the parcel to blast pipe overall structure has been realized, piece that produces during the crops results is under the isolation of cavity structure, can't fall to the blast pipe surface, the phenomenon of piece burning has been avoided.

Meanwhile, the whole heat insulation structure integrally wraps the exhaust main pipe 2 and each manifold 1 of the exhaust pipe into the cavity, so that the exhaust main pipe 2 and each manifold 1 do not need to be wrapped separately, the installation is simple and rapid, the installation time is shortened, and the production efficiency and the speed are improved.

In this embodiment, blast pipe heat-insulating structure includes parcel portion 3 and parcel portion 4 down, the shape of parcel portion 3 and parcel portion 4 down all matches with the exhaust manifold 2 of blast pipe and the pipe network overall structure that each manifold 1 constitutes, it is specific, parcel portion 3 and parcel portion 4 down all have outward flange and inward flange, the shape of outward flange and the exhaust manifold 2 shape phase-match of blast pipe, move towards the setting along exhaust manifold 2's axis, the one end of inward flange is connected to the one end of outward flange, the other end of inward flange is connected to the other end of outward flange, the terminal surface of inward flange is used for the casing setting towards the engine.

Go up and be provided with side parcel 5 between parcel 3 and the lower parcel 4, side parcel 5 sets up along the outward flange of last parcel 3 and lower parcel 4.

Go up parcel portion 3, lower parcel portion 4 and side parcel portion 5 and constitute a cavity that is used for holding exhaust manifold 2 and each manifold 1 of blast pipe jointly, and because side parcel portion 5 only sets up along the outward flange of last parcel portion 3 and lower parcel portion 4, consequently go up parcel portion 3, lower parcel portion 4 and side parcel portion 5 and form the uncovered cavity that sets up in one side.

In this embodiment, the direction of the opening defining the cavity is the inner direction, and the opposite side of the inner direction is the outer direction.

The outer edges of the upper wrapping portion 3 and the lower wrapping portion 4 are flush with each other, and the inner edge of the upper wrapping portion 4 is located in the inner direction of the inner edge of the lower wrapping portion 4.

The side wrapping part 5 comprises a first part 5-1, one end of the first part 5-1 is provided with a second part 5-2, the other end of the first part 5-1 is provided with a third part 5-3, the shape of the first part 5-1 is matched with that of an exhaust manifold 2 of an exhaust pipe, the second part 5-2 and the third part 5-3 are matched with that of the manifold 1, one end of the second part 5-2 is connected with the first part 5-1, the end face of the other end of the second part is a first end face, one end of the third part 5-3 is connected with the first part 5-1, and the end face of the other end of the third part is a second end face.

The first end face is flush with the end face of the inner side of the lower wrapping portion 4, the second end face is not on the same plane with the second end face, the second end face is arranged in the inner side direction of the first end face, so that the third portion 5-3 of the side wrapping portion 5 can extend to one end of a cylinder cover of the engine and wrap the end portion of the cylinder cover, and the second portion 5-2 of the side wrapping portion 5 can extend to the other end of the cylinder cover but is limited by the engine structure and does not wrap the other end of the cylinder cover of the engine.

The tip terminal surface that the inward flange place that goes up parcel portion 3 and be located open side is provided with the fixed part, and lower parcel portion 4 is located the tip terminal surface at open side edge place and also is provided with the fixed part.

The fixing part connected with the upper wrapping part 3 is defined as an upper fixing part 6, the upper fixing part 6 and the upper wrapping part 3 are of an integrated structure and are formed by lengthening the upper wrapping part 3 towards the inner side direction, the fixing part connected with the lower wrapping part 4 is defined as a lower fixing part 7, and the lower fixing part 7 and the lower wrapping part 4 are of an integrated structure and are formed by lengthening the lower wrapping part 4 towards the inner side direction.

The outer side face of one side of the upper reinforcing part 6 is flush with the outer side face of the second part 5-2 of the side wrapping part 5, the other end of the upper reinforcing part does not extend to be flush with the other end of the side wrapping part 5, the end is the third part which is the end part of the cylinder cover wrapped by the side wrapping part 5, a covering part 20 fixed with the top part of the side wrapping part is arranged between the side end part of the upper reinforcing part 6 and the top part of the side wrapping part, and the covering part is used for covering the upper part of the end part of the cylinder cover and further wrapping one side end part of the cylinder cover.

The outer side surface of one side of the lower fixing part 7 is flush with the outer side surface of the second part 5-2 at one end of the side wrapping part 5, and the outer side surface of the other side is flush with the outer side surface of the third part 5-3 at the other end of the side wrapping part 5.

The middle position of the upper wrapping part 5 is provided with a through hole for the passing of a connecting bent pipe between a main pipe of the exhaust pipe and the supercharger, the through hole is provided with a bent pipe wrapping part, and the bent pipe wrapping part is provided with a cavity for accommodating the connecting bent pipe and a flange plate at the end part of the connecting bent pipe.

The return bend parcel portion includes fourth part 8 and fifth part 9, fifth part 9 is fixed with last parcel portion, fifth part 9 is including crossing two parts that set up, be one and two respectively, the one end of fourth part 8 is fixed with the two of fifth part 9, the other end can be folded to tip and the contact of one of fifth part 9, and then enclose synthetic cavity that is used for holding connection return bend and connection return bend tip ring flange, fourth part 8 is close to and is equipped with the couple with the fixed tip position in two, one of fifth part is equipped with the couple, can connect the iron wire between the couple of the two, and then make the gesture of return bend parcel portion keep fixed.

Two tip of side parcel portion 5 all are fixed with the couple through the fixed orifices, can set up the connecting wire between couple and the engine housing, and then will incline the tensioning of parcel portion and press at the blast pipe lateral surface, in this embodiment, for convenient material drawing, the connecting wire adopt the iron wire can, the iron wire both ends are bent and are formed the crotch, articulate with the couple through the crotch structure and are connected.

Go up parcel portion 3 can prevent that the piece from falling to the blast pipe surface from the blast pipe upside, owing to receive the engine fan influence, engine department air current is rotatory, the piece not only can drop from the top, still can blow in from the lower part, consequently, parcel portion 4 can prevent that the piece from falling to the blast pipe from the blast pipe downside down, side parcel portion 5 is owing to extend to the tip of cylinder head, consequently, can prevent the piece from falling to the blast pipe from the left and right sides, consequently, realized on the blast pipe, down, a left side, the comprehensive parcel of four directions in the right side, there is not the overlap joint crack, eliminate the contact of piece and blast pipe completely, the at utmost has reduced the risk of catching fire.

Example 2:

the present embodiment provides an engine, as shown in fig. 1-2, having components such as a cylinder head 15, an intake pipe 10, an exhaust pipe, a supercharger, an engine housing 16, etc., where the exhaust pipe includes an exhaust manifold 2 and a plurality of manifolds 1 connected to the exhaust manifold 2, as shown in fig. 6-7, the engine is provided with the exhaust pipe heat insulation structure described in embodiment 1, and the exhaust manifold 2, the plurality of manifolds 1, and flanges at ends of the manifolds 1 of the exhaust pipe of the engine are all placed in a cavity formed by an upper wrapping portion 3, a lower wrapping portion 4, and a side wrapping portion 5.

The third part 5-3 of the side wrapping part 5 wraps the end part of the cylinder cover of the engine, wherein the wrapping part covers the upper part of the end part of the cylinder cover, and the upper fixing part 6 is folded and then is plugged into the space between the air inlet pipe 10 and the exhaust pipe of the engine, and is fixed in a squeezing way.

In order to prevent the upper fixing part 6 from separating from the space between the air inlet pipe and the exhaust pipe, the limiting wire 11 is arranged, two end parts of the limiting wire 11 are respectively provided with a hook and are connected with the engine shell in a hanging mode and are tensioned, the limiting wire 11 is in contact with the upper fixing part 6 to play a limiting role, and the situation that the upper fixing part is separated from the space between the air inlet pipe and the exhaust pipe due to vibration generated when the engine works is prevented.

Specifically, when going up fixed part 6 and folding, first way folding joint is the part that fixed part and last parcel portion are connected, and spacing silk 11 and the first way folding joint position contact of last fixed part 6 prevent to go up fixed part 6 and break away from the space between intake pipe 10 and the blast pipe.

In order to obtain materials conveniently, the limiting wires 11 are made of iron wires. Both ends of the iron wire are bent to form a hook structure.

The lower fixing part 7 is bent to be approximately vertical to the lower wrapping part, and the lower fixing part 7 is pressed on the surface of the engine shell through the pressing plate 12 after being attached to the shell of the engine.

The pressure plate 12 is an elongated plate, a fixing plate 13 is arranged in the middle of the pressure plate, and the fixing plate 13 is fixed with the shell of the engine through a locking piece.

The retaining member adopts locking bolt, is provided with two at least fixed orificess on the fixed plate, and is corresponding, and the casing of engine be provided with fixed orifices and locking bolt assorted screw hole, locking bolt is fixed clamp plate and the casing of engine, and then will descend the fixed part to compress tightly on engine housing surface.

In another embodiment, the pressure plate is made of angle steel and comprises a vertical pressing part and a supporting part, wherein the pressing part presses the lower fixing part on the surface of the engine shell, and the supporting part is in contact with the bottom surface of the lower wrapping part.

By adopting the mode, the upper fixing part and the lower fixing part are fixed with the shell of the engine, and then the fixing of the whole exhaust pipe heat insulation structure is realized.

Fill in the space between blast pipe and the intake pipe 10 through last fixed part 6, will go up the gap between parcel portion 3 and the engine housing and seal up completely, guaranteed that the piece can not fall to the blast pipe from the blast pipe upside, will compress tightly fixed part 7 on the engine housing surface down through pressing 12 boards for the gap between parcel portion 7 and the engine housing is sealed completely down, has guaranteed that the piece can not fall to the blast pipe from the blast pipe downside.

Two tip of side parcel portion 5 all are provided with the couple, are equipped with connecting wire 14 between the casing of couple and engine, and connecting wire 14 in this embodiment adopts the iron wire, and the iron wire articulates with the couple of side parcel portion and the casing part of engine cylinder head one side through the crotch structure that the tip set up and is connected, and the iron wire is taut, has guaranteed the parcel of side parcel portion to the blast pipe left and right sides, prevents that the piece from falling to the blast pipe from exhaust duct's the left and right sides.

The bent pipe wrapping part wraps the connecting bent pipe between the main pipe of the engine exhaust pipe and the supercharger and the flange plate at the end part of the connecting bent pipe, and chips are prevented from falling on the connecting bent pipe to cause a combustion phenomenon.

The installation method of the heat insulation structure of the embodiment comprises the following steps:

the uncovered side of thermal-insulated structure's cavity is towards the blast pipe, overlaps in the blast pipe periphery, puts into the cavity with the exhaust manifold 2 and the manifold 1 of blast pipe inside completely, and one side tip of cylinder head is lived in one side parcel of thermal-insulated structure, will go up fixed part 6 folding to place the iron wire as spacing silk 11, fill in the space between intake pipe and the blast pipe with the last fixed part of folding, and articulate two its tip and engine case with the taut back of iron wire and be connected.

The lower fixing portion 7 is bent and then attached to the engine case, a pressing plate 12 is attached, and the lower fixing portion 7 is pressed against the surface of the engine case by the pressing plate 12.

And finally, installing an iron wire serving as a connecting wire 14 between the hook at the end part of the side wrapping part 5 and the engine shell, tensioning the iron wire, checking the whole heat insulation structure, checking whether a crack exists, completing installation if no crack exists, and partially adjusting the whole heat insulation structure if a crack exists to block the crack.

It will be appreciated that the attachment location of the wire to the engine housing may be at the location of a bolt on the engine housing or other location where the wire may be attached to a hook.

Other structures of the engine may be the structures of conventional engines, and will not be described in detail here.

Example 3

This embodiment provides a blast pipe heat-insulating structure, as shown in fig. 8, to last fixed part through fill in the fixed mode that the mode is fixed and the fixed part passes through the clamp plate down improve, further promote the convenient and fast nature of installation, make simultaneously go up fixed part and down the fixed part can accomplish respectively with the cylinder head cover of engine and the casing of engine closely laminate, eliminate the piece and get into behind the blast pipe insulating layer with the possibility that the blast pipe contacted, thoroughly stop the problem of catching fire.

The thermal-insulated structure in this embodiment also includes parcel portion 3, parcel portion 4 and side parcel portion 5 down, and the shape of parcel portion 3 and parcel portion 4 down is the same, and side parcel portion 5 is fixed between the outside edge of parcel portion 3 and parcel portion 4 down, constitutes the open cavity structure who sets up of one end jointly, and the cross sectional area of the open end of this cavity structure is greater than the cross sectional area of the other end.

The elbow wrapping portion in the present embodiment is provided at a middle position of the side wrapping portion according to a structural form of the engine.

The end of the upper wrapping portion 3 on the open side is provided with an upper fixing portion 6, and the end of the lower wrapping portion 4 on the open side is provided with a lower fixing portion 7.

The upper fixing portion 6 is for attaching to a head cover 17 of the engine, and the lower fixing portion 7 is for attaching to a housing 16 of the engine.

An upper fixing wire 18 is embedded in the upper fixing portion 6, and a lower fixing wire 19 is embedded in the lower fixing portion 7, in this embodiment, for convenience of material drawing, iron wires are used for the upper fixing wire 18 and the lower fixing wire 19.

The iron wire in the upper fixing portion 6 passes through the upper fixing portion 6 along the length direction of the upper fixing portion, and both ends of the iron wire extend out of the upper fixing portion 6 from the side surface of the upper fixing portion.

The iron wire in the lower fixing portion 7 passes through the lower fixing portion 7 along the length direction of the lower fixing portion, and both ends of the iron wire extend out of the lower fixing portion 7 from the side surfaces of the lower fixing portion 7.

The distance L1 between the iron wire in the upper fixing part 6 and the outer side face of the upper fixing part in the length direction is 10-15mm, and the distance L2 between the iron wire in the lower fixing part 7 and the outer side face of the lower fixing part in the length direction is 10-15mm, so that the exhaust pipe heat insulation cotton can be better attached to a cylinder head cover and an engine shell.

The heat insulation structure of the present embodiment is also made of heat insulation cotton, and the structure of the heat insulation cotton is the same as that of embodiment 1, and the description thereof will not be repeated.

Example 4:

this embodiment provides an engine having components such as a cylinder head, a cylinder head cover 17, an intake pipe, and an exhaust pipe, as shown in fig. 3, provided with the exhaust pipe heat insulating structure described in embodiment 3.

Specifically, as shown in fig. 9-10, the exhaust manifold 2 of the exhaust pipe of the engine, the manifold 1 and the flange of the end of the manifold are all located inside the cavity formed by the upper wrapping portion 3, the lower wrapping portion 4 and the side wrapping portion 5, wherein the upper fixing portion 6 is attached to the cylinder head cover 17 of the engine, the lower fixing portion 7 is attached to the engine housing 16,

in the present embodiment, the exhaust pipe is defined to be located on the front side of the cylinder head cover 17.

Go up two tip of the pre-buried iron wire of fixed part with all fixed with engine housing, wherein the fixed point is located cylinder head cover tip side rear, the taut back of iron wire for go up the trend that the fixed part is pressed close to the cylinder head cover.

Two tip of the pre-buried iron wire of fixed part down with all fixed with engine housing, wherein the fixed point is located cylinder head cover tip side rear, the taut back of iron wire for fixed part is to the trend that engine housing pressed close to down.

In this embodiment, the end of the iron wire is provided with a hook, and is connected with the bolt on the engine on the rear side of the cylinder head cover through the hook.

All be provided with the iron wire between two tip of side parcel portion and the casing of engine, the taut back of iron wire, side parcel portion can be through the taut both sides to the cylinder head of iron wire. The arrangement of the wire is the same as that of the wire between the side wrapping portion and the engine case in example 2, and the description thereof will not be repeated.

The bent pipe wrapping part wraps a connecting bent pipe between an exhaust main pipe of the exhaust pipe and the supercharger and a flange plate between the connecting bent pipes.

The installation method of the heat insulation structure of the exhaust pipe in the embodiment comprises the following steps:

the open side of the cavity faces the exhaust pipe, and the whole heat insulation structure is sleeved on the periphery of the main pipe and the manifold of the exhaust pipe, so that the main pipe and the manifold of the exhaust pipe are located inside the cavity.

The iron wire in the fixed part is strained to the fixed point in cylinder head cover side rear, ensures that the iron wire has the trend that the fixed part is pressed close to the cylinder head cover on making.

And tensioning the left side and the right side of the side wrapping part to an engine shell on two sides of the cylinder cover through iron wires.

The iron wire of the lower fixing part is tensioned to a fixing point at the rear side of the cylinder head cover, so that the iron wire is ensured to have a tendency that the lower fixing part is close to an engine shell.

And (4) checking the whole heat insulation structure to ensure that no leak exists, and finishing the installation of the heat insulation structure.

The exhaust pipe is integrally wrapped in the embodiment, so that the wrapping is tighter; through setting up the iron wire of pre-buried in last fixed part and lower fixed part, make thermal-insulated structure upside and cylinder head cover closely laminate, downside and engine housing closely laminate have ensured with cylinder head cover joint, can not the crack with engine housing joint, have ensured that the piece can not get into inside the blast pipe thermal-insulated structure, have eliminated the hidden danger of catching fire. Simultaneously, make blast pipe thermal-insulated structure upside and cylinder head cover closely laminate through pre-buried iron wire, downside and engine housing closely laminate have eliminated the influence of installation human factor, more are favorable to the production to guarantee with the product uniformity. The exhaust pipe partition structure cannot be separated from the cylinder head cover, the engine shell and the like due to the vibration of the engine due to the tensioning of the pre-buried long iron wires, and the reliability is higher.

Other structures of the engine may be the structures of conventional engines, and will not be described in detail here.

Example 5:

this embodiment provides an agricultural machinery, is provided with embodiment 2 or embodiment 4 the engine, agricultural machinery is easily produced the agricultural machinery of flammable piece for the during operation such as harvester, tractor.

Although the present invention has been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without inventive work are still within the scope of the present invention.

Claims (15)

1. The utility model provides an exhaust pipe heat insulation structure, is made by flexible thermal insulation material, its characterized in that, including last parcel, lower parcel and the side parcel that sets up between last parcel and lower parcel, go up parcel, parcel and side parcel constitute the uncovered setting in one side that is used for holding cavity and cavity of exhaust manifold and a plurality of manifold down, the tip that goes up parcel and parcel position down in uncovered side all is equipped with and is used for the fixed part of exhaust pipe heat insulation structure and engine.

2. The exhaust pipe heat insulating structure according to claim 1, wherein the upper wrap portion or the side wrap portion is provided with a through hole for passing a connecting elbow between the manifold and the supercharger, and the elbow wrap portion is provided at the through hole and has a cavity for receiving the connecting elbow and a flange at an end of the connecting elbow.

3. The exhaust pipe heat insulating structure according to claim 1, wherein both side end faces of the side-wrapping portion are disposed non-flush so that one side end portion of the side-wrapping portion can extend to and wrap a cylinder head end portion of the engine.

4. The exhaust pipe heat insulating structure according to claim 1, wherein a fixing wire is embedded in the fixing portion, and an end portion of the fixing wire extends to an outside of the fixing portion.

5. The exhaust pipe heat insulation structure as claimed in claim 1, wherein the flexible heat insulation material is made of heat insulation cotton, and includes stainless steel wire mesh, glass fiber cloth or high silica fiber cloth, glass fiber cotton, silica gel cloth or aluminum foil cloth arranged from inside to outside in sequence.

6. The exhaust pipe heat insulating structure according to claim 1, wherein hooks are provided to both side portions of the side wrapping portion.

7. An engine, characterized in that the exhaust pipe heat insulation structure of any one of claims 1 to 6 is provided, an exhaust manifold and a manifold of the exhaust pipe are located in a cavity formed by an upper wrapping part, a lower wrapping part and side wrapping parts, and the upper wrapping part and the lower wrapping part are fixed with a shell of the engine through fixing parts.

8. The engine of claim 7, wherein the fixing portion to which the upper wrapping portion is connected is folded to be inserted into a space between an intake duct and an exhaust duct of the engine.

9. The engine according to claim 8, further comprising a limiting wire which is in contact with the fixing portion to which the upper wrapping portion is connected and both end portions of which are connected to a housing of the engine, the limiting wire pressing the folded fixing portion to which the upper wrapping portion is connected to a space between the intake duct and the exhaust duct.

10. The engine of claim 8, wherein the fixing part connected with the lower wrapping part is attached to the shell of the engine and is pressed on the surface of the shell of the engine through the pressing plate.

11. An engine as claimed in claim 10, wherein the pressure plate is provided with a retaining plate which is secured to the housing of the engine by a retaining member.

12. The engine of claim 7, wherein the fixing portion to which the upper wrapping portion is connected and the fixing portion to which the lower wrapping portion is connected are embedded with fixing wires, ends of the fixing wires extend out of the fixing portion and are connected with the engine case, and the fixing wires press the fixing portion against the surface of the engine case.

13. An engine as set forth in claim 7, characterized in that connecting wires are provided between both side ends of the side wrapping portions and the casing of the engine.

14. An engine as set forth in claim 7, wherein a side end portion of the side wrap extends to and wraps the cylinder head.

15. An agricultural machine, characterized in that an engine according to claim 7 is provided.

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