CN110260520A

CN110260520A - Heat exchange unit for heating boiler

Info

Publication number: CN110260520A
Application number: CN201910139075.0A
Authority: CN
Inventors: R·詹诺尼; R·卡斯泰利
Original assignee: Kangdewo PLC
Current assignee: Kangdewo PLC
Priority date: 2018-03-12
Filing date: 2019-02-25
Publication date: 2019-09-20
Also published as: EP3540325A1; KR20190107577A; EP3540325B1; US20190277536A1; IT201800003444A1; EP3690345A1; RU2019103615A; JP2019158326A

Abstract

The heat exchange unit of heating boiler, comprising: there is the shell for the side wall for surrounding inner space, side wall has the open forward end portion circular by the ring edge of shell front end；By the closing flange of the annular of sheet metal, with flange pass through openings to allow access into shell, limit the inner radial flange periphery around pass through openings, radially outer flange periphery around inner radial edge, by radially outer, the spacer flanger part that internal flange edge is connected to each other, ring edge of the radially outer flange periphery along shell front end is connected to shell side wall, the edge limited inner radial surface of inner radial, around the radially-outer surface of inner radial surface, diameter is inside, the leading edge face that outer surface is connected to each other, leading edge face limits and lays flat face, leading edge face, which is located at, to be laid flat on face, the face of laying flat limits axial direction that is orthogonal to that and passing through pass through openings, with radial direction orthogonal to the axial direction；Wherein, inner radial surface by relative to spacer flanger be partially toward on the outside of unit it is outstanding in a manner of be parallel to it is axially extending.

Description

Heat exchange unit for heating boiler

Technical field

The present invention relates to a kind of heat exchange units of boiler for being intended for heating, which can be preferably but non- It is exclusively empty for water heater tool, the heating for being intended for household or air handling system or residential building, industry or business Between.

" heat exchange unit " refers to the unit including at least one heat exchanger, which is mounted on phase In the containing shell answered and it is configured to be actuated at the first heat-transfer fluid recycled in exchanger and is containing second recycled in shell Heat exchange between heat-transfer fluid.

For example, heat exchanger belongs to the type including the pipeline in a manner of spiraling on multiple stacked circles, it should Circle is suitable for being passed through by the first heat-transfer fluid, and then first heat-transfer fluid recycles in heating system, and in the heating system In this pipeline form the central space to burn, the central space is suitable for heating second heat transfer fluid.

Background technique

It the use of the heat exchange unit for including containing shell and the heat exchanger being mounted in it is many in heating boiler industry Well known.

Using including being wound in a manner of spiraling according to multiple stacked circles, with formed the inside for being suitable for carrying burning or in The pipeline in heart space or the exchanger of pipe are also known.

There is this exchanger the front end circle in the outside towards the shell and opposite rear end circle, rear end circle to make Inside of the used time towards shell.Therefore, front end circle has front surface, which is not flat but spiral.

During assembly, exchanger is inserted into shell, shell is opened by the closing flange closure with central opening, the center Mouth is aligned to allow access into exchanger and carry out attended operation with inner space.

Known some embodiments, wherein flange includes the element made of the sheet metal moulded, these elements group each other It is filled with the thermal inertia for just utilizing sheet metal, since its thickness reduces, heat of the thermal inertia relative to the element obtained by die casting Inertia is lower.

Known unit further includes closing door, which is adapted to be mounted to shell, especially flange, to close when in use Opening.

This include be made of fire resisting isolated material, center fastener is in its disk.This discharge plate is configured to be arranged when in use Into the opening at the close flange inner radial edge of flange.

A kind of heat exchange unit with flange known, the flange have the main body made of sheet metal, have the method for surrounding The inner radial edge of orchid opening setting is fastened to the radially outer edge of the shell and inner radial edge and diameter is outside The spacer flanger part that portion edge is connected to each other, wherein middle section be flat and with flange axis vertical take-off.

Inner radial edge be flat and be located at in the plane of flange axis vertical take-off.

In order to allow the door termination opening, door also has the face at the inner radial edge for being suitable for towards and abutting flange.

In order to obtain the sealing between flange and door, need to use at least one according to the above embodiment of background technique Ring washer, the ring washer keep axial and are arranged and axially press against between flange and door.

According to background technique, this washer can be not provided between separator and flange, because inner radial edge Flatness and its relative to flange opening axis orthogonality do not allow washer to be radially disposed between the edge and separator, but It is only capable of being axially set between flange and door.

Therefore, a large amount of heat is transmitted to the inner radial edge of flange from combustion zone, because can set without washer It is placed in one.

On the contrary, according to background technique, washer can be provided only on relative to inner radial edge radially more outward Position.Therefore, this solution does not allow to protect the inner radial end of the internal edge of flange from reaching due to burning The high temperature arrived.In fact, this edge remains and is directly exposed to combustion chamber.

At least one washer is arranged near such internal edge, and therefore in the region with high thermal stress In.

This can generate the rapid degradation of washer itself.

Accordingly, it is desirable to provide a kind of heat exchange unit, allow to make with more efficient way with respect to the background art door with Combustion zone is thermally isolated.Meanwhile it needing further to protect thermal boundary and cigarette sealing element from high thermal stress.

To run the unit suitably, it should be enclosed in front end and cigarette sealing element is set between the interior surface of flange.

For this purpose, the interior surface of flange should be attached to front end circle.

However, front end circle is also spiral, therefore is provided in the exchanger wound in the way of multiple spiral coils Towards the surface of flange face forward, which is not flat but according to conveyor screw forming.

For this surface of the end rings forward of flange to provide with for the surface of its sealing, it should be attached with it ?.

Known trial solves the problems, such as this by being configured to the add ons of conveyor screw, which separates simultaneously with flange And flange is fastened in mode spaced away.

This add ons permission provides sealing between end rings and add ons itself, but is not without disadvantage.

For example, this background technique with add ons needs to provide extremely complex flange arrangement, wherein additional member Part is separately fabricated and is then fastened to flange.This is converted into high production cost.Worse yet, which increase The quality of flange component component increases its thermal inertia, this has a negative impact to the thermal efficiency of the unit.In fact, due to Add ons are separated with flange, therefore it does not contribute to the best cooling of end rings, but are only existed in combustion zone and setting Fluid Sealing is provided between peripheral space outside exchanger.

The surface for enclosing front end is attached to the another of flange and attempts to be to change by the development axis along spiral coil straight Section deforms end rings, thus for the end rings towards and contact the wall part of flat flange even shape be provided.

The variation of the straight section of front end circle negatively affects the flowing of the fluid across it, and flow behavior is made to deviate laminar flow Movement.In fact, fluid is subjected to the variation of the speed and pressure along its path since section changes, this may cause turbulent flow fortune Dynamic, load loss or cavitation.These effects cause the thermal efficiency of unit to reduce.In addition, actuation end circle deforming step is can not The additional production cost of dispute.

Therefore, it is necessary to improve the thermal efficiency of the heat exchange unit with the flange made of sheet metal, thus limiting unit The production cost of itself.

In particular, these known solutions all do not propose a kind of heat exchange with the flange made of sheet metal Unit, which allows while meeting all above-mentioned requirements, and specifically, allows to improve door relative to combustion zone The thermal insulation in domain protects both thermal boundary and cigarette sealing element from high thermal stress, to prolong its service life, and allows to improve single The thermal efficiency of member, while still minimizing production cost.

Summary of the invention

The purpose of the present invention is designing and providing a kind of heat exchange unit, which allows to meet above-mentioned requirements simultaneously And allow at least partly to eliminate the hereinbefore disadvantage with reference to described in background technique.

Particularly, the object of the present invention is to provide a kind of heat exchange unit with the flange made of sheet metal, the heat Crosspoint allows that door is thermally isolated with combustion zone with more efficient way with respect to the background art.

It is a further object of the present invention to provide a kind of heat exchange unit, the heat exchange unit allow further protection thermal boundary and Both cigarette sealing elements are from the high thermal stress from combustion zone.

It is a further object of the present invention to provide a kind of heat exchange units of thermal efficiency that can be improved unit itself.

It is a further object of the present invention to provide the heat exchange units that one kind is capable of the production cost of limiting unit itself.

The object of the invention is also to provide a kind of heat exchange unit with the flange made of sheet metal, the heat exchanges Unit allows while meeting all above-mentioned requirements, and specifically, allows to improve thermal insulation of the door relative to combustion zone, guarantor Both thermal boundary and cigarette sealing element are protected from high thermal stress, to prolong its service life, and allows to improve the thermal efficiency of unit, Production cost is still minimized simultaneously.

These and other objects and advantages are realized by heat exchange unit according to claim 1.

It is shown in other purposes, solution and advantage embodiments described below and in dependent claims In be claimed.

Detailed description of the invention

The some embodiments of the present invention provided by way of explaining rather than limiting below with reference to annexed drawings Description is next, and the present invention will be described, in annexed drawings:

Fig. 1 shows the exploded view of heat exchange unit according to the present invention；

Fig. 2 shows the main views of the closing flange of the unit of Fig. 1；

Fig. 3 shows the cross-sectional view of the flange of Fig. 2 by the section III interception including main shaft as shown in Figure 2；

Fig. 4 shows the cross-sectional view of the flange of Fig. 2 by the section IV interception including main shaft as shown in Figure 2；

Fig. 5 and Fig. 6 shows two perspective views of the flange of Fig. 2 from two different angles respectively；

Fig. 7 shows the flange of Fig. 2 of the interception of the section VII by shown in Fig. 8 including main shaft and is associated with flange Heat exchanger component partial sectional view；

Fig. 8 shows the main view of the component of Fig. 7；

Fig. 9 shows the broken section of the component of Fig. 8 by the section IX interception including main shaft as shown in Figure 8 Figure；

Figure 10 shows the unit of Fig. 1 by the section including main shaft of embodiment according to the present invention Shell, flange, door, exchanger is shown in partial sectional view；

Figure 11 shows the thin of the unit by the section including main shaft of embodiment according to the present invention The partial sectional view of section；

Figure 12 shows unit by the section including main shaft of another embodiment according to the present invention Details partial sectional view；

Figure 13 shows list by the section including main shaft of other embodiment according to the present invention The partial sectional view of the details of member；

Figure 14 shows the partial sectional view of the details of the unit of the section by including main shaft, wherein by abutting The Axial Thermal fault device that part is formed is present in door-plate, suitable for adjacently being placed according to axial direction and being attached to inner radial The front edge surface at edge, and wherein there is cigarette sealing device, which is radially accommodated in inner radial edge Radial outer surface around；

Figure 15 shows the partial sectional view of the details of the unit of the section by including main shaft, wherein heat Fault device is accommodated in radially outward open annular groove, is set between the side surface of disk and door-plate and is arranged in leading edge Near surface, and wherein there is cigarette sealing device, the diameter which is radially accommodated in inner radial edge is outside Around portion surface；

Figure 16 shows the partial sectional view of the details of the unit of the section by including main shaft, wherein heat Fault device is accommodated in radially outward open circular radial groove, is set between the side surface of separator and door-plate and sets It sets in the axial middle position of the radial inner surface at inner radial edge, and wherein there is cigarette sealing device, cigarette sealing Device is accommodated in axially entering in the annular groove of door-plate in door-plate；

Figure 17 shows the partial sectional views of the details of the unit by the section including main shaft, wherein heat Fault device is obtained by the outer radial annular tooth outstanding towards separator, and the inner radial edge of flange is adapted to abut against Front edge surface, and wherein there is cigarette sealing device, it is axially projecting which is accommodated in the slave door-plate in door-plate Ring edge axially enter in the annular groove of door-plate.

Specific embodiment

With reference to attached drawing, the heat exchange unit of heating boiler according to the present invention is usually indicated with appended drawing reference 1.

Heat exchange unit 1 includes shell 10, and shell 10 includes the side wall 11 for surrounding inner space, and the side wall 11 has open Front end 14, the front end 14 are surround by the ring edge 15' of the front end of shell.

The unit further includes annular closing flange 30 made of sheet metal, and the closing flange 30 of the annular has flange Pass through openings 31, to allow access into the inside of shell 10.

Closing flange 30 limits the inner radial flange periphery 33 around pass through openings 31, sets around inner radial edge 33 The radially outer flange periphery 32 set, the centre that radially outer flange periphery 32 and inner radial flange periphery 33 are connected to each other Flange section 34.

Inner radial edge 33 is with annular shape, preferably circular.

Radially outer edge 32 is with annular shape, preferably circular or polygon, preferably has rounded vertex.

Ring edge 15' of the radially outer flange periphery 32 along the front end of shell is connected to the side wall 11 of shell.

According to an embodiment, which includes door 60, which is configured to be removably fastened to the closing flange 30 to close pass through openings 31, which includes separator 62, which includes fire resisting isolated material.

Door 60 may include door-plate 61, which is made preferably of metal, which is fastened on door-plate 61.

Separator 62 is by 63 limited boundary of side panel surface.

Inner radial edge 33 limits radial inner surface 35, the radially outer table being arranged in around radial inner surface 35 Face 36, the front edge surface 37 that the radial inner surface 35 and the radial outer surface 36 are connected to each other.

According to an embodiment, radial inner surface 35 is configured to surround and surrounds side panel surface 63 from outside and allow The sliding axially relative to the radial inner surface 35 of the disk 62.

Front edge surface 37 is located on plane of lie PA.

Such plane of lie PA limits the axial direction A orthogonal with plane of lie PA and the diameter orthogonal with axial direction A To direction R.

Axial direction A is arranged through opening 31.

Radial inner surface 35 is parallel in such a way that the outside relative to spacer flanger part 34 towards the unit 1 is outstanding Extend in axial direction A.

In other words, inner radial edge 33 is configured to the clip extended on A in the axial direction towards the outside of unit 1.

Again in other words, inner radial edge 33 has tubular form or sleeve-shaped, has and is arranged according to axial direction A Axis, and limited by radial inner surface 35 and radial outer surface 36, and with front edge surface 37 axially towards Outside terminates.

According to an embodiment, the side surface 63 of the radial inner surface 35 at inner radial edge 33 and separator 62 is each other It is complementary and be arranged radially when door 60 is mounted on flange 30 in use as minimum range apart.

According to an embodiment, in axial direction A is in the section orthogonal relative to the axial direction A of radial inner surface 35 Constant.

According to an embodiment, radial inner surface 35 is substantially cylindrical or prismatic, is had according to axial side The central axis being arranged to A.Preferably, the side surface 63 of separator 62 is also substantially cylindrical or prismatic, has root The central axis being arranged according to axial direction A.

According to an embodiment, radial inner surface 35 and radial outer surface 36 by a manner of being stacked to bilayer each other The two corresponding metal sheet portions folded limit.

Such two metal sheet portions are e.g. cylindrical.

According to another embodiment, radial inner surface 35 and radial outer surface 36 are by two of single metal piece part Opposite face limits.

According to an embodiment, radial outer surface 36 around radial inner surface 35 and is parallel to radial inner surface 35。

According to an embodiment, for example, as shown in figures 11-13, unit 1 includes thermal boundary device 51 and cigarette sealing device 52, the thermal boundary device 51 and cigarette sealing device 52 be separated from each other and radially internal edge 33 be set to closing flange 30 with Between door 60.

There are two different devices, are thermal boundary device and sealing device, specific spy needed for allowing to optimize the two respectively Sign.

According to some embodiments, as shown in Figure 12 and Figure 13, in axial direction A is set to leading edge table to thermal boundary device 51 Between face 37 and door 60.

In other words, the outer end at inner radial edge is arranged in thermal boundary device, the outer end and inner radial side End of the edge towards combustion zone is opposite.Since radial inner surface surrounds the side surface of separator, latter portion it is protected From thermal stress.By means of the setting, temperature of the inner radial edge axially at outer end is lower than inner radial edge The axially temperature at inner end.Therefore, thermal boundary device 51 is partly protected by separator 62.

According to an embodiment, for example, as shown in figure 12, thermal boundary device 52 include disk 62 annular periphery protrusion 66 or by It is formed, and the annular periphery protrusion 66 is in the radial direction R prominent from the side surface 63 of the separator 62.

Integral piece can be made with separator 62 in this annular projection 66.

Annular periphery protrusion 66 forms abutment surface 64, which is located in the plane orthogonal with axial direction A And it is configured to axially be attached to the front edge surface 37 of closing flange 30.

Therefore, separator 62 itself plays thermal boundary, allows to avoid using any other thermal boundary device.

As shown in Figure 12 and Figure 13 itself, cigarette sealing device 52 can in the radial direction R be set to the radial direction of closing flange Between the radial outer surface 36 of internal edge and the periphery radial seal edge 65 of the door 60.

In other words, cigarette sealing device 52 by closing flange inner radial edge radial outer surface 36 receive and/ Or it is fastened to the radial outer surface 36.

The feature for the radial inner surface 36 for surrounding the side surface of separator 62 is also particularly advantageous, to protect cigarette close Seal apparatus is from high temperature.In fact, disk 62 (its side surface 63 is at the minimum range away from radial inner surface 35) is also protected The radial outer surface 36 of the inner radial flange periphery 33 of cigarette sealing device 52 is installed from high temperature.

According to another embodiment, such as shown in figure 11, thermal boundary device 51 is in the radial direction R set to closing flange 30 Radial inner surface 35 and door 60 between.

Therefore, this thermal boundary device 51 is axially disposed at the upstream of cigarette sealing device 52.

Cigarette sealing device 52 can such as in axial direction A be set between front edge surface 37 and door 60.

Also according to the embodiment, the feature for the radial inner surface 36 for surrounding the side surface of separator 62 is also special It is advantageous, to protect cigarette sealing device from high temperature.In fact, (its side surface 63 is in away from inner radial table separator 62 At the minimum range in face 35) also protect the radial outer surface for being equipped with the inner radial flange periphery 33 of cigarette sealing device 52 36 from high temperature.

According to an embodiment, thermal boundary device 51 includes washer 53, and washer 53 is selected from ceramic fibre line washer, glass fibre Line washer or graphite gasket.

According to an embodiment, cigarette sealing device 52 includes the washer 54 selected between rubber washer and silicone gasket.

According to an embodiment, unit 1 includes the heat exchanger 80 being mounted in shell 10.

Exchanger 80 is the type for including at least one tubular pipeline 81, which encloses in the way of multiple circles The axis of screw around the coincidence of axially A setting is helically wrapped, and multiple circle is towards the closing flange 30 Front end spiral coil 82 is to terminate.

Intermediate annular flange section 34 can be advantageously shaped to continuously be attached to front end spiral coil 82.

Therefore, flange 30 (and especially spacer flanger part 34) has dual function: promoting flange and exchanger 80 Front end circle 82 between cigarette sealing element, and pass through and the cooling spacer flanger part 34 of contact of front end circle 82.

In fact, this front end circle 82 is placed on the exit of exchanger, and by heated fluid, preferably water (it is subsequently fed in heating system) passes through.

There is about 80-90 DEG C of temperature across this heated fluid of front end circle 82, which is far below The temperature of the central space for the exchanger that wherein generation burning and Men Yuqi are faced, the temperature of the central space is about 800- 900℃。

Therefore, the attachment of spacer flanger part and front end circle 82 allows flange temperature being reduced to 80- from 800-900 DEG C 90 DEG C, to protect thermal boundary device and cigarette sealing device from high temperature.

According to an embodiment, intermediate annular flange section 34 is shaped in the way of the single helical form ring, should Helical form ring is linked by step part 38 in the end of helical form ring.Fig. 9 shows the example of this step part Section.

The axis of conveyor screw preferably in axial direction A setting, it is preferably consistent with the central axis of shell C-C.

This helical form ring is terminated closer to being with first end 34' at the position of the outside of the unit in the axial direction, and And the second end 34 " is sentenced to terminate closer to the inside of the unit in the axial direction, wherein such first end 34' and second End 34 " is preferably connected to each other in a manner of rounding step part 38.

According to an embodiment, tubular pipeline 81 has the constant section in the portion that extends along, wherein this section is flat Smoothization and there is the substantially straight opposite upside 83 and downside 84 in section assessed according to axial direction.

In this case, intermediate annular flange section 34 is configured to flat conveyor screw.

According to an embodiment, for example, as shown in fig. 7, the diameter of the opening of flange D1 is substantially equal to the interior of exchanger Portion diameter D2.

According to an embodiment, for example, as shown in figures 11-13, closing flange 30 includes from 33 court of inner radial edge To the axial projections 39 of the internal stretch of unit 1, wherein this axial projections 39 form exchanger 80 about closing flange 30 To middle part.

It according to an embodiment, should for example, as Figure 1-Figure 8, closing flange 30 includes at least one flat 43 Flat 43 is preferably placed in the plane orthogonal with axial direction A.

According to an embodiment, which prolongs from radially outer edge 32 towards inner radial edge 33 It stretches.

Each such flat 43 is suitable for support according to the corresponding holding pin 41 that axial direction A is arranged with by door 60 It is fastened to closing flange 30.

According to an embodiment, unit 1 includes that clamp device 40 can be removed so that door 60 is fastened to closing flange 30.

It includes at least one above-mentioned holding pin 41 that clamp device 40, which can be removed, and the holding pin 41 is at least one flat Closing flange 30 is fastened at 43, and in axial direction A is arranged with its axis, and from flange 30 is closed towards unit 1 Outside is prominent, and manufactures at least one corresponding through-hole 42 slidably to receive holding pin 41, described in executing in door 60 The assembling of door 60 and flange 30.

According to an embodiment, spacer flanger part 34 is included at least one circular passage 44 of side to unit 1, The circular passage 44 is suitable for receiving in the mode being arranged between spacer flanger part 34 and the end convolution circle 82 of exchanger close Closure material.

According to an embodiment, unit 1 include be arranged in spacer flanger part 34 and exchanger end convolution circle 82 it Between sealing material, so that it is guaranteed that the sealing between spacer flanger part 34 and the end convolution circle 82 of exchanger.

This sealing material is preferably provided at least one above-mentioned circular passage 44.

According to an embodiment, closing flange 30 includes orientation and anti-rotational protrusion 45, is adapted to engage in shell 10 and makes In the corresponding seat 46 made, to be correctly oriented to closing flange 30 relative to shell 10.

According to an embodiment, the radial direction is folded by the ring edge 15' around the second sidewall end 15 of shell 10 The radially outer edge 32 of the peripheral part 32' of external margin 32, closing flange 30 are fastened to the second sidewall end 15 of shell.

According to an embodiment, the radially outer edge of flange 32 is located at parallel with the plane of lie PA of front edge surface 37 Plane on.

According to an embodiment, radially outer edge 32 is circular and with one heart or same relative to inner radial edge 33 Axis.

According to an embodiment, shell 10 includes two half-shells 12,13, the two half-shells can be fitted together to pass through edge Radial direction R draws close the two half-shells to form the shell 10.

According to an embodiment, two half-shells 12,13 can by be parallel to axial direction A or including axial direction The separating plane of A and be separated from each other.

According to an embodiment, side wall 11 is generally cylindrical, and wherein the central axis C-C of shell is parallel to radial direction A Setting, and shell 10 includes the rear wall of the rear end of closed side wall 11.

According to an embodiment, shell 10 is made of plastic material.

According to an embodiment, shell 10, exchanger 80, flange 30, radial inner surface 35, door 60 and disk 62 are same each other Axis, central axes are overlapped with the central axis C-C of the shell of side wall 11.

According to preferred embodiment, flange 30 forms integral piece by single metal piece completely by way of plastic deformation.

Multiple advantages thereby is achieved, these advantages therein are described below.

For example, allowing to avoid different members the closing flange made of the single metal piece of plastic deformation or deep drawing molding A large amount of manufactures of part and assembly operation.But economic advantages are not unique advantages.

In fact, single part, which is made, in inner radial edge 33 and spacer flanger part 34 allows to be easy between them to obtain Structural continuity is obtained, so as to avoid the region with the internal stress generated by welding.In addition to this, this flange allow through By the variation of related temperature, in the case where different parts fit together, this will lead to different thermal expansions, and therefore lead Cause the bigger mechanical stress between these parts.

Similarly, all parts of flange allow flange execution a variety of by the feature that integral piece is made in single original metal piece Function is without being added to it other component.

In fact, radial inner surface 35 facilitates the thermal insulation of door and cooperating with the side surface 63 of separator 62, And radial inner surface 35 can support radial thermal boundary device 51, radial outer surface 36 can with protect cigarette sealing device or Washer accommodates cigarette sealing device or washer from the mode of heat, and front edge surface 37 can cooperate close to form thermal boundary 51 or cigarette Sealing 52.

In addition, spacer flanger part 34 can be attached to the front end circle 82 of exchanger 80 with cooling flange 30.

The radially outer edge 32 made of the sheet metal folded is conducive to make simply by rolled deforming step Flange is assembled into the side wall of shell non-removablely.

Allow only to pass through plastic deformation by the flange 30 that the sheet metal of single-piece is integrally formed integral piece by being plastically deformed And using the molding for reducing quantity, obtain all following parts of flange: inner radial edge 33 and radially outer edge 32, It is configured to middle section 34, the flat 43, axial projections 39 (ensuring overall structure continuity in-between) of conveyor screw.

According to another aspect of the present invention, above-mentioned mesh is met by the door 60 for heat exchange unit 1 as described above And advantage.

Above-mentioned heat exchange unit 1 includes shell 10, and shell 10 includes the side wall 11 for surrounding inner space, and the side wall 11 has spacious The front end 14 opened.

Side wall 11 is fastened to close the closing flange 30 and shell annular made of sheet metal of open front end 14 10 is associated.

Closing flange 30 has flange pass through openings 31, and the flange pass through openings 31 are by the outer pleurapophysis towards the unit 1 The inner radial flange periphery 33 of tubular form out is surround.

Door 60 includes the separator 62 comprising refractory material.

Separator 62 limits the door axial direction AP and door radial direction AR relative to the separator 62.

Separator 62 is from closed 63 side of side panel surface to limited boundary.

Door 60 further includes being fastened with the door-plate 61 of disk 62, and limit and extend along the closed outline around side panel surface 63 General planar door coupling surfaces 67.

Door coupling surfaces 67 are normally located otherwise with side panel surface 63.

Door includes thermal boundary device 51 and cigarette sealing device 52, wherein between thermal boundary device 51 and cigarette sealing device 52 at least One be arranged to according to radial direction AR come with Men Peihe.

According to an embodiment, thermal boundary device 51 is arranged on door radial direction AR cooperate with the door 60, and cigarette Sealing device 52 is arranged on door axial direction AR cooperate with door 60.For example, Figure 11 and Figure 16 show this embodiment.

According to an embodiment, thermal boundary device 51 includes the annular heat washer 53 being accommodated in radial slot, which exists Enter the door from the side surface of disk 63 on door radial direction AR, and wherein the cigarette sealing device 52 includes being accommodated in axial groove In ring packing washer 54, the axial groove door axial direction AR it is enterprising enter door-plate 61.

According to an embodiment, thermal boundary device 51 is arranged on door axial direction AR cooperate with the door 60, and institute Cigarette sealing device 52 is stated to be arranged on door radial direction AR cooperate with the door 60.For example, Figure 12, Figure 13, Figure 17 shows Such embodiment.

According to an embodiment, thermal boundary device 51 is formed by annular projection 66, institute of the annular projection 66 from separator 62 It states side surface 63 radially to protrude, and wherein the cigarette sealing device 52 includes seal washer, which is suitable for Institute is radially acted on against relative to the axially projecting ring edge 65 of the door coupling surfaces 67 on door radial direction AR State door.

According to an embodiment, thermal boundary device 51 is by from the side surface 63 of separator 62 radially annular outstanding The formation of protrusion 66, and wherein cigarette sealing device 52 is accommodated in annular groove, and which enters door-plate along door radial direction AR 61。

According to an embodiment, thermal boundary device 51 includes the heat pad circle 53 being accommodated in axial groove, and the axial groove is along door-hinge Enter door-plate 61 to direction AR, and wherein the smog sealing device 52 includes seal washer, which is suitable in door It is described against radially being acted on relative to the axially projecting ring edge 65 of the door coupling surfaces 67 on radial direction AR Door.

According to an embodiment, the thermal boundary device 51 and the cigarette sealing device 52 are arranged in door radial direction AR It is upper to cooperate with the door.Figure 14 and Figure 15 shows the embodiment.

According to an embodiment, when to place away from 33 minimum range of inner radial flange periphery, thermal boundary device is by disk 62 Side wall 63 formation, and wherein cigarette sealing device 52 include cigarette seal washer 54, the cigarette sealing element washer 54 be suitable in access The door is radially acted on against relative to the axially projecting ring edge 65 of the door coupling surfaces 67 on the AR of direction.

According to an embodiment, thermal boundary 51 includes the annular heat washer 53 being accommodated in radial slot, and the radial slot is in access Enter door from the side surface of disk 63 on the AR of direction, and wherein cigarette sealing device 52 includes cigarette seal washer 54, cigarette sealing Washer 54 is suitable on door radial direction AR against relative to axially projecting 65 diameter of ring edge of the door coupling surfaces 67 The door is acted on to ground.

According to an embodiment, thermal boundary device 51 includes heat pad circle 53, and washer 53 is selected from ceramic fibre line washer, glass fibers Tie up line washer or graphite gasket.

In order to meet possible needs, the element of the embodiment of arrangement described above can be modified, be adapted by expert Be changed to other function equivalent, without departing from the range of appended claims.It is described as belonging to possible embodiment Each feature can be realized independently of described other embodiments.

Device needed for pursuing described different function and material can have different property, without departing from the present invention Range.

Other than the mutually exclusive combination of at least some of these features feature, all features described herein can be with It is combined in any combination way.

Claims

1. a kind of heat exchange unit (1) for heating boiler, comprising:

Shell (10), the shell (10) include the side wall (11) for surrounding inner space, and the side wall (11) has open front end (14), the front end (14) is surround by the ring edge (15') of the front end of the shell,

The closing flange (30) of annular, the closing flange (30) are made of sheet metal, have flange pass through openings (31) to permit Perhaps enter the inside of the shell (10), closing flange (30) limits the inner radial flange around the pass through openings (31) Edge (33), around the radially outer flange periphery (32) of the inner radial edge (33) setting, by the radially outer method The spacer flanger part (34) that blue edge (32) and the inner radial flange periphery (33) are connected to each other, the radially outer method The ring edge (15') of the front end of the blue edge (32) along the shell is connected to the side wall (11) of the shell,

Wherein, the edge limited radial inner surface of the inner radial (35), around the radial inner surface (35) setting Radial outer surface (36), the leading edge that the radial inner surface (35) and the radial outer surface (36) are connected to each other Surface (37), the front edge surface (37) limit plane of lie (PA), and the front edge surface (37) lays flat flat described in On face (PA), the plane of lie (PA) limits axis that is orthogonal with the plane of lie (PA) and passing through the pass through openings (31) To direction (A) and the radial direction orthogonal with the axial direction (A) (R), wherein the radial inner surface (35) with Outside mode outstanding relative to the spacer flanger part (34) towards the unit (1) is parallel to the axial direction (A) extend.

2. unit according to claim 1, wherein the axial direction relative to the radial inner surface (35) (A) orthogonal section is constant along the axial direction (A).

3. unit (1) according to claim 1 or 2, wherein the radial inner surface (35) and the radially outer table Face (36) is limited by two be folded each other in a manner of being stacked to bilayer corresponding metal sheet portions.

4. according to unit described at least one preceding claims, wherein the flange (30) is completely by the sheet metal of single-piece Integral piece is formed by way of plastic deformation.

5. according to unit (1) described at least one preceding claims, comprising:

The heat exchanger (80) being mounted in the shell (10), the exchanger (80) include at least one tubular pipeline (81), The tubular pipeline (81) surrounds in the way of multiple circles and spirally rolls up along the axis of screw that the axial direction (A) is arranged Around the multiple circle is to terminate with the circle end convolution circle (82) towards closing flange (30)；

Wherein, the intermediate annular flange section (34) is configured to continuously be attached to the end convolution circle (82).

6. unit (1) according to claim 5, wherein the intermediate annular flange section (34) is according to single spiral Come what is shaped, the helical form ring is combined by step part (38) in the end of the helical form ring mode of shape ring.

7. unit (1) according to claim 6, wherein the closing flange (30) includes from the inner radial edge (33) towards the axial projections (39) of the internal stretch of the unit (1), wherein this axial projections (39) form the exchange Device (80) is about closing flange (30) to middle part.

8. unit (1) according to claim 1, wherein the closing flange (30) includes at least one flat (43), the flat (43) extends from the radially outer edge (32) towards the inner radial edge (33), described Flat (43) is located in the plane orthogonal with the axial direction (A), wherein at least one described flat (43) Each flat (43) be suitable for supporting the corresponding holding pin (41) that is arranged according to the axial direction (A), by door (60) it is fastened to the closing flange (30).

9. unit (1) according to claim 5, wherein the spacer flanger part (34) is included side to described At least one circular passage (44) of unit (1), the circular passage (44) are suitable for be arranged in the spacer flanger part (34) mode between the end convolution circle (82) of the exchanger receives sealing material.

10. according at least one of unit (1) described in preceding claims, including door (60), the door (60) be configured to can The mode of removal is fastened to the closing flange (30) to close the pass through openings (31), and the door (60) includes disk (62), The disk (62) includes fire resisting isolated material, and the disk (62) is by side panel surface (63) limited boundary；

Wherein, the radial inner surface (35) is configured to surround and surrounds the side panel surface (63) from outside, and allows Side panel surface (63) slide axially.

11. unit (1) according to claim 10, including thermal boundary device (51) and cigarette sealing device (52), the thermal boundary Device (51) and the cigarette sealing device (52) are separated from each other and are set to along the inner radial edge (33) described It closes between flange (30) and the door (60).

12. unit (1) according to claim 11, wherein the thermal boundary device (51) is arranged along the axial direction (A) Between the front edge surface (37) and the door (60).

13. unit (1) according to claim 12, wherein the cigarette sealing device (52) sets along the radial direction (R) It is placed between the radial outer surface (36) of the closing flange and the periphery radial seal edge (65) of the door (60).

14. unit (1) according to claim 12 or 13, wherein the thermal boundary device (52) includes the disk (62) Annular periphery protrusion (66) is formed, the annular periphery protrusion (66) by the annular periphery protrusion (66) of the disk (62) Prominent from the side surface (63) of the disk (62) along the radial direction (R), the annular periphery protrusion (66) forms adjacency list Face (64), the abutment surface (64) are located in the plane orthogonal with the axial direction (A) and are configured to axially adhere to To the front edge surface (37) of closing flange (30).

15. unit (1) according to claim 11, wherein the thermal boundary device (51) is arranged along the radial direction (R) Between the radial inner surface (35) and the door (60) of closing flange (30).

16. unit (1) according to claim 15, wherein the cigarette sealing device (52) sets along the axial direction (A) It is placed between the front edge surface (37) and the door (60).

17. unit (1) according to claim 11, wherein the thermal boundary device (51) includes washer (53), the washer (53) ceramic fibre line washer, glass wire washer or graphite gasket are selected from.

18. unit (1) according to claim 11, wherein the cigarette sealing device (52) includes from rubber washer and silicon The washer (54) selected between rubber gasket.