CN215413299U - Heat exchanger - Google Patents

Abstract

The utility model discloses a heat exchange device, comprising: the heat exchange element comprises a tube bundle, a first flower disc and a second flower disc, wherein the first flower disc and the second flower disc are respectively fixed at two ends of the tube bundle in a sealing mode; the positioning groove is positioned on the periphery of the first faceplate, the first groove wall of the positioning groove forms an axial positioning surface, and the groove bottom of the positioning groove forms a radial positioning surface; at least part of the positioning element extends into the positioning groove, and one end surface and the inner wall of the positioning element are respectively abutted against an axial positioning surface and a radial positioning surface in the positioning groove so as to form axial limit and radial limit on the first faceplate. The positioning structure is stable and reliable, the positioning strength is high, and stable and reliable sealing is ensured to be formed among the cylinder, the first faceplate and the first seal head.

Description

Heat exchanger

Technical Field

The utility model belongs to the technical field of heat exchange, and particularly relates to a heat exchange device.

Background

Japanese patent JP4680933B2 discloses a heat exchanger including a case and a resin pipe, the end of the resin pipe forming a honeycomb structure, the resin pipe and the honeycomb structure passing through the case, the outer diameter of the honeycomb structure being smaller than the inner diameter of the case, the outer periphery of the honeycomb structure compensating its outer diameter by a split ring, a case-side end plate simultaneously pressing against a case-side convex portion, the split ring and a case-side flange of the honeycomb structure, the pipe-side end plate being fixed to the case-side end plate by bolts, the pipe-side flange being fixed to the pipe-side end plate by bolts, the bolts being tightened, i.e., the assembling operation of the heat exchanger is completed. The shell-side convex part of the honeycomb structure is clamped between the shell-side end plate and the split ring, one set of screws penetrates through the pipe-side end plate and is screwed to the shell-side end plate to press the shell-side end plate to the shell-side flange, and the other set of screws is used for screwing the pipe-side flange to the pipe-side end plate to fix the shell-side convex part of the honeycomb structure. In the assembly process of the heat exchanger, the shell side end plate and the split ring clamp and fix the shell side convex part from two ends of the shell side convex part so as to position the honeycomb structure. However, in actual installation, the shell-side end plate and the split ring often cannot play a stable positioning role for the honeycomb structure, and the honeycomb structure is easy to have axial offset or radial dislocation. When the axial displacement or radial dislocation is excessive, the sealing performance is degraded. When the heat exchanger is used under the conditions of high pressure and high temperature, leakage is easy to occur, so that process fluid and heat exchange fluid are mixed, and the process fluid is polluted. In addition, two sets of screws for fastening the honeycomb structure to the shell-side flange are not screwed to the endmost shell-side flange, insufficient fastening force of the screws may occur, further increasing the risk of leakage of the heat exchanger.

Therefore, a new heat exchange device is needed to be provided, and the problems that the tube bundle end is not stably positioned, the tube bundle end is axially offset or radially dislocated, and the sealing performance is reduced and leakage is caused in the existing heat exchanger are solved.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides the heat exchange device which can stably limit the end part of the tube bundle and can provide reliable sealing performance.

The technical scheme adopted by the utility model for solving the technical problems is as follows: a heat exchange device comprising:

the outer cylinder is provided with two open ends and at least two pipe fittings on the side wall; the first end socket and the second end socket are respectively provided with at least one pipe fitting and are respectively fixed at two ends of the outer cylinder in a sealing way; the heat exchange element comprises a tube bundle, a first flower disc and a second flower disc, wherein the first flower disc and the second flower disc are respectively fixed with two end parts of the tube bundle in a sealing mode; also included is a positioning element; the positioning groove is arranged on the periphery of the first faceplate, the first groove wall of the positioning groove forms an axial positioning surface, and the groove bottom of the positioning groove forms a radial positioning surface; at least part of the positioning element extends into the positioning groove, and one end surface and the inner wall of the positioning element are respectively abutted against an axial positioning surface and a radial positioning surface in the positioning groove so as to form axial limit and radial limit for the first faceplate.

In the heat exchange device provided by the utility model, the length of the inner ring part of the positioning element is clamped into the positioning groove on the periphery of the first faceplate, the positioning element is fixed on the periphery of the first faceplate through the matching of the positioning element and the positioning groove, particularly, the axial positioning surface and the radial positioning surface are respectively matched with the positioning element, so that the axial limiting and the radial limiting of the first faceplate are realized, the positioning effect is more stable and reliable, the positioning strength is high, the stable positioning of the first faceplate between the outer barrel and the first seal head is ensured through the double limiting of the axial positioning surface and the radial positioning surface, the first faceplate is prevented from being axially offset or radially dislocated, and the stable and reliable sealing is ensured to be formed among the first end of the outer barrel, the first faceplate and the first seal head.

Furthermore, the locating slot is an annular groove which circumferentially extends to the periphery of the first faceplate and is also provided with a second slot wall opposite to the first slot wall, and the height of the first slot wall is greater than that of the second slot wall.

The positioning groove is annular, the whole circle of the positioning groove is positioned, and the positioning strength is high; the height of the first groove wall is greater than that of the second groove wall, so that a larger axial positioning area is provided, and the positioning strength of axial positioning is improved; the second groove wall prevents the positioning element from being displaced randomly in the opposite direction to the first groove wall.

Furthermore, the positioning element comprises a first acting surface which can be abutted against the axial positioning surface, a second acting surface which can be abutted against the radial positioning surface, a third acting surface which is opposite to the first acting surface, and a fourth acting surface which is opposite to the second acting surface.

A plurality of acting surfaces on the positioning element can respectively abut against and match with a plurality of groove walls and sealing elements of the positioning groove on the first faceplate, so that the assembly is convenient, and the limiting structure is more stable.

Furthermore, at least part of the outer ring of the positioning element is positioned outside the positioning groove, and the outer ring part is respectively connected with the first end of the outer barrel, the first faceplate and the first seal head in a sealing manner through a sealing element.

The sealing element is arranged to enable the positioning element to be matched with the positioning groove more stably, the position of the first face disc is effectively limited, face sealing is formed among the first end of the outer cylinder, the first face disc, the positioning element and the first seal head, the sealing performance between the first face disc and the outer cylinder and between the first seal head is greatly improved, and the sealing performance is also guaranteed to be reliable under the conditions of higher temperature and pressure.

Furthermore, the sealing element comprises a pressing element in sealing fit with the third acting surface of the positioning element and a wrapping element in sealing fit with the positioning element, the first face plate and the first end socket, and the pressing element and the end surface of the outer ring of the wrapping element are abutted to form sealing.

The wrapping element simultaneously forms axial and radial positioning for the positioning element and the first disc chuck from one side and forms sealing at the corresponding contact surface, the pressing element forms axial positioning for the positioning element from the other side, and the positioning element and the first disc chuck are more stably limited due to the cooperation of the wrapping element and the pressing element.

Furthermore, the wrapping element comprises a first pressing ring, the inner wall of the first pressing ring is in sealing fit with the fourth acting surface of the positioning element and the area, located outside the positioning groove, of the first acting surface of the positioning element, and the area, located between the positioning element and the first seal head, of the first faceplate; the second pressing ring is sleeved on the periphery of the first pressing ring, and the inner wall of the second pressing ring is attached to the outer wall of the first pressing ring to form sealing; and the sealing flange is in compression joint with the end face of the first compression ring and the periphery of the second compression ring and is connected with the first sealing head in a sealing way.

First clamping ring and second clamping ring are established in proper order and are established the locating element, the periphery and the terminal surface of first flower disc, the inner wall laminating locating element of first clamping ring and the partial outer wall shape of first flower disc by the cladding, thereby form good sealing action, also avoid it to take place axial or radial skew, sealing flange then follows radially and axially to carry on spacingly to the second clamping ring, and with first head sealing connection, whole assembly structure is simple, sealed effect is reliable, a plurality of parts setting of wrapping up the component has increased its location intensity to first flower disc and locating element.

Furthermore, the sealing element also comprises a first connecting flange which is fixedly connected with the first end of the outer cylinder, and the end surface of the first connecting flange is abutted to the pressing element; a first fastener which sequentially screws the first connecting flange and the compressing element to the second compression ring to form sealing abutment between adjacent parts; the second fastener is used for screwing the sealing flange to the second pressing ring and forming sealing abutting between the adjacent end faces; the second connecting flange is fixedly connected with the first seal head; and a third fastener sealingly securing the second attachment flange to the sealing flange.

The first connecting flange and the compressing element are screwed and fixed to the second compression ring through the first fastener, the three are in sealing connection, the sealing flange is screwed and fixed to the second compression ring through the second fastener, the sealing flange and the second compression ring are in sealing connection, the first seal head and the sealing flange are fixed through the third fastener, the first fastener and the second fastener, the third fastener staggers and fixes a plurality of parts in the axis direction, all the parts are fixed in a layered mode, the assembling and disassembling are convenient, the connecting structure is stable, and the phenomenon that the first flower disc is displaced due to the fact that all the parts are connected through one connecting piece can be effectively avoided.

Furthermore, compress tightly the component with first clamping ring offsets sealed fit, just compress tightly the component with the third working face, the partial surface that first clamping ring contacts all coats and has the fluorine-containing resin lining.

Compressing tightly the sealed cooperation of component and first clamping ring, having realized the effect of dual seal, all seal the cladding with the periphery of locating element, first flower disc, it is better to seal the effect, and the setting up of fluorine-containing resin lining can improve the sealing performance between the adjacent terminal surface, improves overall structure's leakproofness.

Furthermore, the third acting surface is a step surface with a thickness difference, the pressing element abuts against the part with smaller thickness of the outer edge area of the third acting surface, and a gap is reserved between the inner wall of the pressing element and the transition part of the step surface.

The step surface design of the third acting surface can provide an additional radial limiting effect for the positioning element, and the gap provides a deformation space for the thermal expansion of the first disc chuck.

Further, the positioning elements are two semicircular ring structures; alternatively, the positioning element is a broken ring structure.

The two structures are convenient for installing the positioning element.

The utility model has the beneficial effects that: positioning element's inner circle part length card is gone into in the constant head tank of first flower disc periphery, cooperation through positioning element and constant head tank, in order to be fixed in the periphery of first flower disc with positioning element, through axial positioning face and radial positioning face respectively with positioning element's cooperation, the realization is spacing and radial spacing to the axial of first flower disc, location structure is more stable, and is reliable, the positioning strength is high, the dual spacing assurance first flower disc of axial positioning face and radial positioning face forms stable location effect between the first end of urceolus and first head, avoid first flower disc to take place axial migration or radial dislocation, thereby ensure the first end of urceolus, form between first flower disc and the first head stably, reliable is sealed.

Drawings

Fig. 1 and 2 are perspective views of the heat exchange device provided by the present invention in two directions.

Fig. 3 is a top view of the heat exchange device of fig. 1 and 2.

Fig. 4 is a sectional view a-a in fig. 3.

Fig. 5 is a partial enlarged view of the portion of fig. 4 in which the sealing member is located.

Fig. 6 is a side view of the heat exchange device of fig. 1 and 2.

Fig. 7 is a cross-sectional view taken along line D-D in fig. 6.

FIG. 8 is a schematic view of the positioning element and the first faceplate of the heat exchange device of FIG. 7.

Fig. 9 is a sectional view of a heat exchange member of the heat exchange device of fig. 1 and 2.

Fig. 10 is a cross-sectional view of the compression element of fig. 4, 5 and 7.

Figure 11 is a cross-sectional view of the first pressure ring of figures 4, 5 and 7.

Figure 12 is a top view of the second pressure ring of figures 4, 5 and 7.

Fig. 13 is a sectional view taken along line B-B in fig. 12.

Fig. 14 is a top view of the sealing flange of fig. 4, 5 and 7.

Fig. 15 is a cross-sectional view taken along line C-C of fig. 14.

Wherein, 100-heat exchange device, 10-outer cylinder, 101-pipe fitting on outer wall of outer cylinder, 102-first end of outer cylinder, 103-second end of outer cylinder, 20-first end socket, 201-pipe fitting on first end socket, 30-second end socket, 301-pipe fitting on second end socket, 40-heat exchange element, 401-pipe bundle, 402-heat exchange pipe, 41-first end of heat exchange element, 51-first flower disc, 510-positioning groove, 511-axial positioning surface, 512-radial positioning surface, 513-first groove wall, 514-second groove wall, 52-second flower disc, 520-convex part, 53-gasket, 54-second connecting flange, 55-fourth connecting flange, 60-positioning element, 601-first acting surface, 602-second acting surface, 603-third active surface, 604-inner ring region, 605-outer edge region, 606-cylindrical surface, 607-fourth active surface, 70-sealing element, 701-first connecting flange, 702-first fastening means, 703-second fastening means, 703A-shorter second fastening means, 703B-longer second fastening means, 704-third connecting flange, 705-third fastening means, 71-pressing element, 711-gap, 712-first bore, 713-fluorine-containing resin lining, 714-first end face of pressing element, 715-second end face of pressing element, 72-wrapping element, 721-first press ring, 722-second press ring, 723-sealing flange, 724-annular projection, 725-second bore, 726-third bore, 727-first internally threaded hole, 728-second internally threaded hole, 729-third internally threaded hole.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 15, the heat exchanging device 100 includes an outer cylinder 10 having a hollow interior, a first sealing head 20 and a second sealing head 30 hermetically fixed at both ends of the outer cylinder 10, and a heat exchanging element 40 disposed in the outer cylinder 10. The outer cartridge 10 has open first and second ends 102 and 103 with a sidewall having at least two tubes 101. The first seal head 20 is fixed at a first end 102 of the outer cylinder 10, and the second seal head 30 is sealingly fixed at a second end 103 of the outer cylinder 10. The first head 20 has at least one pipe 201 thereon, and the second head 30 has at least one pipe 301 thereon.

According to the properties of the shell-side fluid and the tube-side fluid, PO can be lined on the inner wall of the outer cylinder 10, and the first head 20 and the second head 30 can be lined with fluorine resin such as PFA, so as to improve the overall tolerance of the heat exchange device 100 and prolong the service life of the heat exchange device 100.

In some embodiments, the side wall of the outer cylinder 10 has four pipe members 101, two of which are located at two opposite sides and two ends of the outer cylinder 10, two of which are located at two ends of the outer cylinder 10 and are used as an inlet and an outlet of the shell-side heat exchange fluid, and two of which are used as outlets of the condensed gas and the liquid. Of course, the discharge ports for condensed gas and liquid are provided, as the case may be.

As shown in fig. 9, the heat exchange member 40 includes a tube bundle 401 extending along the length direction of the outer tube 10 and composed of a plurality of heat exchange tubes 402, and a first faceplate 51 and a second faceplate 52 fixed to both ends of the tube bundle 401 in a sealing manner. The middle portion of the heat exchange tubes 402 pass through baffles having a plurality of holes to space adjacent heat exchange tubes 402 apart to facilitate rapid flow of shell-side fluid and increase heat exchange rate. The heat exchange tube 402, the first faceplate 51 and the second faceplate 52 are made of PTFE, so as to meet the resistance to corrosive fluid. The first faceplate 51 and the second faceplate 52 are each a disk structure, and a plurality of openings through which the heat exchange tubes 402 pass are formed inside.

As shown in fig. 4, 5 and 7, the maximum value of the outer diameter of the first faceplate 51 is smaller than the minimum value of the inner diameter of the hollow inside of the outer cylinder 10, the outer diameter of the second faceplate 52 is larger than the inner diameter of the outer cylinder 10, a convex part 520 is formed on the outer periphery of the second faceplate 52, the second end 103 of the outer cylinder 10 is fixedly connected with the second connecting flange 54, the second end cap 30 is fixedly connected with the fourth connecting flange 55, the convex part 520 and the gasket 53 are clamped between the second connecting flange 54 and the fourth connecting flange 55 and fixedly connected through screws, so that the second faceplate 52 and the second end 103 of the outer cylinder 10 and the second end cap 30 are hermetically connected.

Taking the direction shown in fig. 4 as an example, the right end of the outer cylinder 10 is defined as the first end 102 of the outer cylinder 10, the left end is defined as the second end 103 of the outer cylinder 10, and the end of the heat exchange element 40 where the first spline 51 is located is defined as the first end 41 of the heat exchange element 40. When the heat exchanger is assembled, the first end 41 of the heat exchange element 40 extends into the second end 103 of the outer cylinder 10 and extends out of the first end 102 of the outer cylinder 10, and the first disc chuck 51 is limited between the first sealing head 20 and the first end 102 of the outer cylinder 10 by the matching of the positioning element 60 and the positioning groove 510.

As shown in fig. 8, the first disc chuck 51 has a positioning groove 510 on its outer circumference, a first groove wall 513 forming an axial positioning surface 511 and a groove bottom forming a radial positioning surface 512. At least part of the positioning element 60 extends into the positioning slot 510, and an end surface and an inner wall of the positioning element 60 respectively abut against the axial positioning surface 511 and the radial positioning surface 512 of the positioning slot 510 to form an axial limit and a radial limit for the first faceplate 51, so as to prevent the first faceplate 51 from deviating. The length of the inner ring part of the positioning element 60 is clamped into the positioning groove 510 on the periphery of the first faceplate 51, the positioning element 60 is fixed on the periphery of the first faceplate 51 by the matching of the positioning element 60 and the positioning groove 510, and the double limiting of the axial positioning surface 511 and the radial positioning surface 512 ensures that the first faceplate 51 forms a stable positioning effect between the first end 102 of the outer cylinder 10 and the first seal head 20, so that the first faceplate 51 is prevented from axial deviation or radial dislocation, and stable and reliable sealing is formed between the first end 102 of the outer cylinder 10, the first faceplate 51 and the first seal head 20.

In the present embodiment, the positioning groove 510 is an annular groove extending circumferentially around the outer periphery of the first disc chuck 51, and includes a first groove wall 513 as an axial positioning surface 511, a groove bottom as a radial positioning surface 512, and a second groove wall 514 opposite to the first groove wall 513, and the radial height of the second groove wall 514 is smaller than that of the first groove wall 513. The second slot wall 514 prevents the positioning element 60 from being randomly displaced in a direction opposite to the first slot wall 513, and the height of the first slot wall 513 being greater than the height of the second slot wall 514 provides a larger axial positioning area, increasing the positioning strength of the axial positioning. The positioning slot 510 extends circumferentially a full revolution and provides a full revolution of the positioning element 60.

The positioning element 60 comprises a first active surface 601 intended to abut against the axial positioning surface 511, a second active surface 602 intended to abut against the radial positioning surface 512, a third active surface 603 opposite the first active surface 601, and a fourth active surface 607 opposite the second active surface 602. The first active surface 601 is a flush annular flat surface, the third active surface 603 is not a flush flat surface but a stepped surface having a difference in thickness, and the third active surface 603 is composed of an annular surface of the inner race region 604 having a larger thickness, an annular surface of the outer rim region 605 having a smaller thickness, and a cylindrical surface 606 perpendicularly transitioning therebetween.

For installation convenience, the positioning element 60 is formed as two semicircular ring structures, and the two semicircular ring structures are inserted into the positioning groove 510 from two sides respectively during installation. Alternatively, the positioning element 60 may be a broken ring structure, and before the positioning element 60 is installed, the positioning element 60 is first broken from the broken position and then sleeved in the positioning groove 510.

In the preferred embodiment, the positioning element 60 is a two semicircular ring structure. At this time, the annular surface of the inner ring region 604 having a large thickness is constituted by 2 semi-annular surfaces, and the annular surface of the outer edge region 605 having a small thickness is also constituted by 2 semi-annular surfaces. During assembly, the two semicircular rings are oppositely sleeved on the periphery of the first faceplate 51, part of the length of the inner ring area 604 with larger thickness of each semicircular ring is clamped into the positioning groove 510, and the thickness of the inner ring area 604 is slightly smaller than the axial groove width of the positioning groove 510. After the assembly is completed, the third acting surface 603 faces the outer cylinder 10, the first acting surface 601 faces the first seal head 20, and the first acting surface 601 abuts against the first groove wall 513 on the side of the positioning groove 510 close to the first seal head 20, namely the axial positioning surface 511, so as to form axial positioning.

The radial width of the positioning element 60 is greater than the radial width of the axial positioning surface 511, and at least a portion of the outer ring of the positioning element 60 is located outside the positioning groove 510, and the outer ring portion is sealingly connected to the first end 102 of the outer cylinder 10 and the first sealing head 20 through the sealing element 70.

As shown in fig. 4 and 5, the sealing member 70 includes a pressing member 71 and a wrapping member 72; the pressing element 71 is in sealing engagement with the third active surface 603 of the positioning element 60, more specifically the pressing element 71 is in sealing engagement against an outer edge region 605 of the third active surface 603, which has a smaller thickness.

As shown in fig. 10, the outer ring of the pressing member 71 is provided with a plurality of first holes 712 with internal threads, and the outer surface of the radially inner region thereof is coated with a fluorine-containing resin lining layer 713, such as PFA resin, PTFE resin, or other fluorine-containing resin; the inner wall of which is parallel to the cylindrical surface 606 of the third active surface 603. Furthermore, the pressing element 71 has a first end face 714 facing the outer cylinder 10 and a second end face 715 facing the first closure 20, the first end face 714 abutting against a first connecting flange 701 which is sealingly fixed at the first end 102 of the outer cylinder 10, the second end face 715 abutting against an annular surface of the outer edge region 605 of the positioning element 60 in an inner region of the first bore 712. In this embodiment, the pressing member 71 and the first connecting flange 701 are provided in a separate body. In other embodiments, the pressing element 71 may be integrated with the first connecting flange 701.

As shown in fig. 4, 5 and 7, the surrounding element 72 is in sealing engagement with the positioning element 60, the first disc chuck 51 and the first head 20, respectively, and an outer ring end surface of the surrounding element 72 abuts against an end surface of the pressing element 71 to form a surface seal. In this embodiment, the surrounding element 72 includes a first pressing ring 721, a second pressing ring 722 and a sealing flange 723, the first pressing ring 721 is made of PTFE, and the inner wall of the first pressing ring is in sealing fit with the fourth acting surface 607 of the positioning element 60 and the area of the first acting surface 601 outside the positioning groove 510, and the area of the first faceplate 51 between the positioning element 60 and the first sealing head 20.

As shown in fig. 11, the outer ring region of the first compression ring 721 extends radially outwardly to form an annular protrusion 724, and the annular protrusion 724 abuts against the compression element 71 to achieve a sealing fit. As shown in fig. 4, 5 and 7, the inner and outer surfaces of the first press ring 721 each include a plurality of step surfaces, the step surfaces of the inner surface and the second end surface 715 of the pressing element 71 are located in the area between the outer periphery of the fourth acting surface 607 of the positioning element 60 and the inner side of the first hole 712, the outer periphery of the fourth acting surface 607 of the positioning element 60 and the area where the first acting surface 601 thereof is located outside the positioning groove 510, the outer periphery of the first faceplate 51 located between the positioning element 60 and the first head 2, and the portion of the end surface of the first faceplate 51 facing the first head 20 are matched in shape, so that the first press ring 721 can directly cover the outer periphery and the end portion of the positioning element 60 and the first faceplate 51 and abut against the pressing element 71.

As shown in fig. 10, in order to further improve the sealing effect of the corresponding sealing surfaces, the outer surfaces of the portions of the pressing member 71, which are in contact with the third acting surface 603 of the positioning member 60 and the annular protrusion 724 of the first pressing ring 721, are coated with a fluorine-containing resin lining layer.

In addition, as shown in fig. 5, in order to provide a certain deformation space for the first faceplate 51 to expand by heat, a gap 711 is left between the inner wall of the pressing element 71 and the transition portion of the third acting surface 603 of the step surface.

As shown in fig. 4, 5 and 7, the second press ring 722 is sleeved on the outer periphery of the first press ring 721, and the inner wall of the second press ring is attached to the outer wall of the first press ring 721, so that a surface seal is formed. The inner surface of the second pressing ring 722 is a stepped surface matching the outer surface shape of the first pressing ring 721. As shown in fig. 12 and 13, the outer edge of the second pressing ring 722 is formed with a plurality of second holes 725 having internal threads and a plurality of third holes 726 having internal threads, and the hollow interior of the second holes 725 has two sections with different sizes.

As shown in fig. 4, 5 and 7, and 14 and 15, a sealing flange 723 is pressed against the end surface of the first pressing ring 721 and the outer periphery of the second pressing ring 722, and is sealingly connected to the first sealing head 20. The inner and outer surfaces of the sealing flange 723 are stepped surfaces, and the inner surface of the sealing flange is wrapped around the outer periphery of the second pressing ring 722 and the end of the first pressing ring 721 facing the first sealing head 20. The outer edge of the sealing flange 723 has a plurality of first internal threaded holes 727 and second internal threaded holes 728, the first internal threaded holes 727 being closed toward the outer cylinder 10 side, and both sides of the second internal threaded holes 728 being open. The outer surface of the region of sealing flange 723 located within first internally threaded bore 727 is lined with a fluorine-containing resin lining. And, the outside at second internal thread hole 728 still is equipped with four sizes and is less than the third internal thread hole 729 of first internal thread hole 727 and second internal thread hole 728, can insert the screw in the third internal thread 729, and the screw passes through third internal thread hole 729, and the tip supports the terminal surface that leans on second clamping ring 722, is used for adjusting the interval between sealing flange 723 and the second clamping ring 722.

In order to fix the first and second pressing rings 721, 722 and the sealing flange 723 relatively, the sealing element 70 further includes a first connecting flange 701, a first fastening member 702, a second fastening member 703, a third connecting flange 704 and a third fastening member 705. The first connecting flange 701 is fixedly connected to the first end 102 of the outer cylinder 10, and an end surface thereof abuts against the pressing member 71.

The first fasteners 702 are screws that pass through the internally threaded holes of the first attachment flange 701, the first hole 712 of the compression element 71, and the second hole 725 of the second compression ring 722 in sequence to tighten the first attachment flange 701 and the compression element 71 to the second compression ring 722 and form a sealed abutment between adjacent components. Wherein the first fastening member 702 has a plurality of and is uniformly arranged.

The second fastener 703 comprises two lengths of screw: the outer cylinder 10 comprises a plurality of short second fastening members 703A and a plurality of long second fastening members 703B, wherein the short second fastening members 703A are uniformly arranged in the circumferential direction, and the number of the long second fastening members 703B is 2 and the long second fastening members 703B are symmetrically arranged at two radial ends of the first end 102 of the outer cylinder 10. A second, shorter fastener 703A passes through a second internally threaded hole 728 of the sealing flange 723 and is threaded a portion of the length into a second hole 725 of the second compression ring 722 to tighten the sealing flange 723 to the second compression ring 722. The 2 longer second fastening members 703B pass through the remaining 2 second internally threaded holes 728 of the sealing flange 723 and the two third holes 726 of the second compression ring 722, respectively, and extend partially into the first hole 712 of the compression member 71 to form a threaded connection. The 2 longer second fasteners 703B further increase the tightening force between the sealing flange 723, the second compression ring 722 and the compression element 71, improving the sealing effect between the respective sealing surfaces. Of course, whether the 2 longer second fastening members 703B are additionally provided or not depends on the actual use condition of the heat exchange device 100.

The third connecting flange 704 is fixedly connected with the first sealing head 20, the third fastening member 705 is a screw, the screw penetrates through the internal threaded hole of the third connecting flange 704 and is screwed to the first internal threaded hole 727 of the sealing flange 723 so as to fix the third connecting flange 704 to the sealing flange 723, and the third fastening member 705 is uniformly distributed in a plurality along the circumferential direction at intervals.

The assembly steps of the above described filter device 100 are as follows:

(1) extending the first faceplate 51 of the heat exchange element 40 out of the first end 102 of the outer cylinder 10, and attaching the pressing element 71 to the end face of the first connecting flange 701;

(3) the two semicircular rings of the positioning element 60 are clamped into the positioning groove 510;

(4) the first pressing ring 721 and the second pressing ring 722 are sequentially sleeved on the outer peripheries and the end parts of the positioning element 60 and the first faceplate 51, the first fastener 702 sequentially penetrates through the internal thread hole of the first connecting flange 701, the first hole 712 of the pressing element 71 and the second hole 725 of the second pressing ring 722, and the first connecting flange 701 and the pressing element 71 are screwed to the second pressing ring 722;

(5) a sealing flange 723 is sleeved on the outer periphery of the second pressing ring 722, and a plurality of short second fasteners 703A penetrate through a second internal threaded hole 728 of the sealing flange 723 and are screwed into a second hole 725 of the second pressing ring 722 by part of the length so as to fasten the sealing flange 723 to the second pressing ring 722; the 2 longer second fastening members 703B respectively penetrate through the remaining 2 second internal threaded holes 728 of the sealing flange 723 and two third holes 726 of the second pressing ring 722, and partially extend into the first hole 712 of the pressing element 71 to form a threaded connection;

(5) installing a first seal head 20 at the tail end of a sealing flange 723, and screwing a third connecting flange 704 fixed to the first seal head 20 to a first internal threaded hole 727 of the sealing flange 723 close to an inner ring by a third fastener 705;

(6) the second disc 52 and the second head 30 are mounted to the second end 103 of the outer cylinder 10. Also, a gasket 53 may be interposed between the boss 520 and the second connecting flange 54, and between the boss 520 and the fourth connecting flange 55 to increase the sealing performance of the connection. Similarly, a gasket may be additionally provided between the first faceplate 51, the first end 102 of the outer cylinder 10 and the adjacent parts of the sealing element 70 as required.

Of course, the fixing order of the first disc chuck 51 and the second disc chuck 52 can be interchanged in the above installation process.

The foregoing detailed description is intended to illustrate and not limit the utility model, which is intended to be within the spirit and scope of the appended claims, and any changes and modifications that fall within the true spirit and scope of the utility model are intended to be covered by the following claims.

Claims (10)

1. A heat exchange device comprising: the outer cylinder is provided with two open ends and at least two pipe fittings on the side wall; the first end socket and the second end socket are respectively provided with at least one pipe fitting and are respectively fixed at two ends of the outer cylinder in a sealing way; the heat exchange element comprises a tube bundle, a first flower disc and a second flower disc, wherein the first flower disc and the second flower disc are respectively fixed with two end parts of the tube bundle in a sealing mode; the method is characterized in that: also included is a positioning element; the positioning groove is positioned on the periphery of the first faceplate, the first groove wall of the positioning groove forms an axial positioning surface, and the groove bottom of the positioning groove forms a radial positioning surface; at least part of the positioning element extends into the positioning groove, and one end surface and the inner wall of the positioning element are respectively abutted against an axial positioning surface and a radial positioning surface in the positioning groove so as to form axial limit and radial limit for the first faceplate.

2. The heat exchange device of claim 1, wherein: the locating slot is an annular groove which circumferentially extends to the periphery of the first faceplate and is also provided with a second slot wall opposite to the first slot wall, and the height of the first slot wall is greater than that of the second slot wall.

3. The heat exchange device of claim 1 or 2, wherein: the positioning element comprises a first acting surface which can be abutted against the axial positioning surface, a second acting surface which can be abutted against the radial positioning surface, a third acting surface which is opposite to the first acting surface and a fourth acting surface which is opposite to the second acting surface.

4. The heat exchange device of claim 3, wherein: at least part of the outer ring of the positioning element is positioned outside the positioning groove, and the outer ring part is respectively in sealing connection with the first end of the outer barrel, the first flower disc and the first seal head through sealing elements.

5. The heat exchange device of claim 4, wherein: the sealing element comprises a pressing element in sealing fit with the third acting surface of the positioning element and a wrapping element in sealing fit with the positioning element, the first face plate and the first seal head, and the pressing element and the outer ring end surface of the wrapping element are abutted to form sealing.

6. The heat exchange device of claim 5, wherein: the wrapping element comprises a first pressing ring, the inner wall of the wrapping element is in sealing fit with the fourth acting surface of the positioning element, the area of the first acting surface of the positioning element, which is positioned outside the positioning groove, and the area of the first chuck, which is positioned between the positioning element and the first seal head;

the second pressing ring is sleeved on the periphery of the first pressing ring, and the inner wall of the second pressing ring is attached to the outer wall of the first pressing ring to form sealing;

and the sealing flange is in compression joint with the end face of the first compression ring and the periphery of the second compression ring and is connected with the first sealing head in a sealing way.

7. The heat exchange device of claim 6, wherein: the sealing element also comprises a first connecting flange which is fixedly connected with the first end of the outer cylinder, and the end surface of the first connecting flange is abutted with the pressing element; a first fastener which sequentially screws the first connecting flange and the compressing element to the second compression ring to form sealing abutment between adjacent parts; the second fastener is used for screwing the sealing flange to the second pressing ring and forming sealing abutting between the adjacent end faces; the third connecting flange is fixedly connected with the first seal head; and a third fastener sealingly securing the third attachment flange to a sealing flange.

8. The heat exchange device of claim 6, wherein: the compressing element is in abutting sealing fit with the first pressing ring, and the outer surface of the contact part of the compressing element, the third acting surface and the first pressing ring is coated with a fluorine-containing resin lining layer.

9. The heat exchange device of claim 8, wherein: the third acting surface is a step surface with a thickness difference, the pressing element abuts against the part with smaller thickness of the outer edge area of the third acting surface, and a gap is reserved between the inner wall of the pressing element and the transition part of the step surface.

10. The heat exchange device of claim 1, wherein: the positioning elements are two semicircular ring structures; alternatively, the positioning element is a broken ring structure.

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