CN220982019U - Tubular heat exchanger - Google Patents

Abstract

The utility model belongs to the field of heat exchange devices for fixing tubular channel assemblies for two heat exchange media, and particularly relates to a tubular heat exchanger. In order to solve the problems that in the prior art, under the condition of not replacing cold fluid, if the better cooling effect is to be achieved, the shell and the heat exchange tube bundle need to be made very long, so that the processing and the manufacturing are inconvenient and the cleaning are inconvenient; under the condition of only replacing cold fluid, in order to avoid excessive temperature reduction and to avoid the technical problems that conditions such as temperature, flow rate of the cold fluid and flow rate of the hot fluid need to be strictly controlled and the like are inconvenient to use, the utility model provides a tubular heat exchanger. The plurality of shells are arranged, so that the length of each shell and the length of the heat exchange tube positioned in each shell can be shortened, and the processing, the manufacturing and the cleaning are convenient.

Description

Tubular heat exchanger

Technical Field

The utility model belongs to the field of heat exchange devices for fixing tubular channel assemblies for two heat exchange media, and particularly relates to a tubular heat exchanger.

Background

Tube heat exchangers are used when cooling non-azeotropic multicomponent mixtures, i.e. mixtures of various objects having different boiling points, such as sealants. The application publication number is CN 106440883A, the Chinese patent application with application publication date being 2017.05.22 discloses a horizontal shell-and-tube heat exchanger, which comprises a shell, wherein a hollow cavity penetrating through the shell is arranged on the shell, a first sealing head (i.e. an inflow sealing head) and a second sealing head (i.e. an outflow sealing head) for sealing the hollow cavity are respectively arranged at two ends of the shell, and a hot fluid inlet pipe (i.e. a heat exchange liquid inlet port) and a hot fluid outlet pipe (i.e. a heat exchange liquid outlet port) are respectively arranged on the first sealing head and the second sealing head; the shell is provided with a first tube plate (i.e. tube plate) and a second tube plate (i.e. tube plate) which are used for being matched with the first end socket and the second end socket to form an inflow cavity, a heat exchange cavity and an outflow cavity; a plurality of heat exchange tube bundles (namely heat exchange tubes) are also arranged in the hollow cavity of the shell, and two ends of the heat exchange tube bundles are respectively and hermetically connected to the first tube plate and the second tube plate, so that the inflow cavity is communicated with the outflow cavity; and a cold fluid inlet pipe (i.e. a heat exchange medium inlet port) and a cold fluid outlet pipe (i.e. a heat exchange medium outlet port) which are communicated with the cooling cavity are also arranged on the shell.

When the horizontal shell-and-tube heat exchanger is used for cooling the hot fluid, if the cooling effect is required to be better achieved without replacing the cold fluid, the heat exchange area needs to be increased, so that the length of the cooling chamber and the length of the heat exchange tube bundle need to be increased, and the single shell and the single heat exchange tube bundle need to be made long. The longer shell and the heat exchange tube bundle are inconvenient to process and manufacture, and meanwhile, the longer heat exchange tube bundle is inconvenient to clean. In the case of replacing only the cold fluid, in order to avoid excessive temperature drop, conditions such as the temperature, flow rate of the cold fluid, and the like need to be strictly controlled, and the use is inconvenient.

Disclosure of utility model

The utility model aims to provide a tubular heat exchanger so as to solve the problems that in the prior art, under the condition of not replacing cold fluid, if a better cooling effect is to be achieved, a shell and a heat exchange tube bundle are required to be made to be long, so that the processing and the manufacturing are inconvenient and the cleaning are inconvenient; under the condition of only replacing cold fluid, in order to avoid excessive temperature reduction, conditions such as temperature, flow rate and flow rate of hot fluid of the refrigeration fluid need to be strictly controlled, and the use is inconvenient.

In order to achieve the above purpose, the technical scheme of the tubular heat exchanger provided by the utility model is as follows:

The utility model provides a tubular heat exchanger, includes inflow head, outflow head and connects the casing between inflow head and outflow head, is equipped with the heat transfer liquid inlet on the inflow head, is equipped with the heat transfer liquid outlet on the outflow head, and the both ends of casing are equipped with the tube sheet, still are equipped with the heat exchange tube in the casing, the both ends of heat exchange tube respectively sealing connection on the tube sheet at casing both ends, between inflow head and the outflow head sealing connection in proper order have at least two the casing, the tube sheet that is close to inflow head in the casing that is connected with inflow head encloses into inflow cavity with inflow head, encloses outflow cavity with the tube sheet that is close to outflow head in the casing that is connected with outflow head, encloses into heat transfer cavity between the tube sheet at each casing both ends, encloses into the well transfer cavity that is used for transferring heat transfer liquid between the adjacent two tube sheets of adjacent two casings, inflow cavity and outflow cavity are through heat exchange tube and transfer cavity intercommunication.

The beneficial effects are as follows: the utility model is an improved utility model. By arranging at least two shells and forming a transit chamber between two adjacent shells, on one hand, the length of each shell and the heat exchange tube positioned in each shell can be shortened, so that the processing, the manufacturing and the cleaning are convenient; on the other hand, heat exchange liquid is stored in the transfer chamber between two adjacent shells, and the heat exchange liquid and the heat exchange chambers at two sides of the transfer chamber can exchange heat through the two tube plates forming the transfer chamber, so that the heat exchange efficiency of the whole tubular heat exchanger is improved, the length of the whole tubular heat exchanger can be further shortened, the lengths of each shell and the heat exchange tubes positioned in each shell can be further shortened, and the processing, the manufacturing and the cleaning are convenient; in still another aspect, heat exchange media with different temperatures or different specific capacities can be disposed in different heat exchange chambers in different shells, that is, a first heat exchange medium can be disposed in the heat exchange chamber of the shell close to the outflow end enclosure, and a second heat exchange medium can be disposed in the heat exchange chamber of the other shells, where the temperature of the first heat exchange medium is higher than that of the second heat exchange medium, so that the last shell achieves a heat preservation function, or the specific heat capacity of the first heat exchange medium is different from that of the second heat exchange medium, so that the last shell achieves a heat preservation function. For example, if it is desired to reduce the temperature of the hot fluid from 85 ℃ to 40 ℃, 10 ℃ of water may be provided in the first housing, reducing the temperature of the hot fluid from 85 ℃ to 50 ℃, 20 ℃ of water may be provided in the second housing, reducing the temperature of the hot fluid from 50 ℃ to 40 ℃, and when there is a third housing, the temperature of the water in the third housing may be directly provided as 40 ℃, thereby ensuring that the temperature of the hot fluid is reduced to 40 ℃; of course, a first heat exchange medium with smaller specific heat capacity at 10 ℃ can be arranged in the second shell, and at the moment, the temperature rise speed of the first heat exchange medium is higher, so that the temperature difference between the hot fluid and the first heat exchange medium is reduced faster, the temperature reduction speed of the hot fluid is slower, and the hot fluid is ensured to be reduced from 50 ℃ to 40 ℃; of course, when the specific heat capacity of the hot fluid is smaller and the specific heat capacity of the hot fluid is larger than that of water, the temperature of the hot fluid after passing through the first shell is reduced to about 40 ℃, and then water with larger specific heat capacity of 40 ℃ is introduced into the second shell, so that the temperature of the hot fluid is basically unchanged even if the heat capacity of part of the hot fluid is absorbed due to the larger specific heat capacity of the water, and the temperature of the hot fluid is ensured to be 40 ℃.

Furthermore, a sealing ring is arranged between the two adjacent shells, and the sealing ring and the two adjacent tube plates of the two adjacent shells jointly enclose a transfer cavity.

The beneficial effects are as follows: through setting up the sealing washer, can make sealing washer and two adjacent tube sheets enclose into the transfer cavity jointly when realizing sealing connection of two adjacent casings, simple structure.

Furthermore, the two ends of the shell are provided with flanges, the two adjacent shells are connected through flange sealing, and the sealing ring is arranged between the flanges of the two adjacent shells.

The beneficial effects are as follows: the two adjacent shells can be conveniently and hermetically connected through the flange.

Further, in the connection ends where the adjacent two shells are connected, the connection end of at least one shell has a protruding portion protruding from the end tube plate in the axial direction, and the protruding portion and the adjacent two tube plates of the adjacent two shells enclose a transit chamber together.

The beneficial effects are as follows: through making the one end protrusion of casing in the tube sheet that is located this end of this casing, can make bulge and two adjacent tube sheets of two adjacent casings enclose into the transfer cavity jointly, simple structure.

Further, the two ends of each shell are provided with the convex parts.

The beneficial effects are as follows: for the technical scheme that one end of each shell protrudes from the corresponding tube plate, when the two shells are in butt joint, the front side and the back side of each shell do not need to be distinguished, so that the positions of the two shells, which do not protrude from the corresponding tube plate, are prevented from being in butt joint, and the installation is convenient.

Further, each shell is provided with at least two heat exchange tubes, and in two adjacent shells, at least one heat exchange tube in one shell and all heat exchange tubes in the other shell are arranged in a staggered manner.

The beneficial effects are as follows: through making the at least one heat exchange tube in one casing and all heat exchange tubes in another casing all misplaced, can avoid when the length of well change cavity is too little, the heat exchange liquid that flows from this heat exchange tube can directly get into in the heat exchange tube of another casing, perhaps avoid directly flowing into in this heat exchange tube from the heat exchange tube of another casing, thereby guarantee that heat exchange liquid can strike on the tube sheet of low reaches after flowing out from the heat exchange tube of upper reaches, thereby realize the stirring of interior liquid of well change cavity, and then promote the heat exchange efficiency of transfer cavity department and heat exchange tube department of low reaches, finally improve the heat exchange efficiency of whole tubular heat exchanger.

Furthermore, temperature detection devices for detecting the temperature of heat exchange liquid in the inflow cavity or the outflow cavity are also arranged on the inflow end socket and the outflow end socket.

The beneficial effects are as follows: the temperature detection device can conveniently obtain the temperature of the heat exchange liquid before and after heat exchange.

Furthermore, each shell is also provided with a heat exchange medium inlet and a heat exchange medium outlet which are communicated with each heat exchange chamber.

The beneficial effects are as follows: the heat exchange medium inlet and the heat exchange medium outlet are arranged, so that the heat exchange medium in the heat exchange cavity of each shell can be conveniently replaced, the temperature difference between the heat exchange medium in each heat exchange cavity and the heat exchange liquid is ensured to be large, and the heat exchange efficiency is improved.

Drawings

FIG. 1 is a front view of a tube heat exchanger of the present utility model;

FIG. 2 is a left side view of the tubular heat exchanger of the present utility model with the inlet head omitted;

FIG. 3 is a top view of a tubular heat exchanger of the present utility model;

Fig. 4 is a cross-sectional view of the portion a in fig. 3.

Reference numerals illustrate:

1. An inflow end socket; 2. a heat exchange liquid inlet; 3. a heat exchange medium inlet; 4. a heat exchange medium outlet; 5. a housing; 6. a flange; 7. outflow end socket; 8. a heat exchange liquid outlet; 9. a tube sheet; 10. a heat exchange tube; 11. a seal ring; 12. a transfer chamber.

Detailed Description

The present utility model is described in further detail below with reference to examples.

Specific example 1 of a tubular heat exchanger provided by the utility model:

An object of this embodiment is to provide a tubular heat exchanger that can promote heat exchange efficiency, shorten casing and heat exchange tube length, through establishing the casing as split type a plurality of to make between two adjacent casings form the structure of similar plate heat exchanger, and then promote heat exchange efficiency, shorten the length of each casing and the heat exchange tube that is located each casing.

As shown in fig. 1-4, this embodiment specifically discloses a tubular heat exchanger, including an inflow end enclosure 1, an outflow end enclosure 7, and a housing 5 connected between the inflow end enclosure 1 and the outflow end enclosure 7, where the inflow end enclosure 1 is provided with a heat exchange liquid inlet 2, the outflow end enclosure 7 is provided with a heat exchange liquid outlet 8, the housing 5 is provided with a hollow cavity, two ends of the housing 5 are provided with tube plates 9 sealing the hollow cavity, a heat exchange tube 10 located in the hollow cavity is further provided in the housing 5, two ends of the heat exchange tube 10 are respectively and hermetically connected to the tube plates 9 at two ends of the housing 5, at least two housings are sequentially and hermetically connected between the inflow end enclosure 1 and the outflow end enclosure 7, the tube plates 9 close to the inflow end enclosure 1 in the housing 5 connected to the inflow end enclosure 1 and the outflow end enclosure 7 enclose an outflow cavity with the outflow end enclosure 7, the tube plates 9 close to the outflow end enclosure 7 in the housing 5 each housing encloses a heat exchange cavity, two adjacent housings enclose a middle conversion cavity 12 for transferring heat exchange liquid, and the outflow cavity is communicated with the conversion cavity 12 through the heat exchange tube plates. In the present embodiment, the number of the housings 5 is two, and the heat exchange medium is water, but in other embodiments, the number of the housings 5 may be three, four or more, and the heat exchange medium may be any heat exchange medium such as high-temperature steam, organic solution or the like, so that the heat exchange liquid can be heated or cooled by changing different heat exchange media.

By providing at least two shells and forming a transit chamber 12 between two adjacent shells, on one hand, the length of each shell and the heat exchange tube 10 in each shell can be shortened, thereby facilitating processing, manufacturing and cleaning; on the other hand, the heat exchange liquid exists in the transfer chamber 12 between two adjacent shells, and the heat exchange liquid and the heat exchange chambers on two sides of the transfer chamber 12 can exchange heat through the two tube plates forming the transfer chamber 12, so that the heat exchange efficiency of the whole tubular heat exchanger is improved, the length of the whole tubular heat exchanger can be further shortened, and the lengths of each shell and the heat exchange tube 10 positioned in each shell can be further shortened, so that the processing, the manufacturing and the cleaning are convenient; in still another aspect, heat exchange media with different temperatures or different specific capacities can be arranged in different heat exchange chambers in different shells, namely, a first heat exchange medium can be arranged in the heat exchange chamber of the shell close to the outflow end socket, and a second heat exchange medium is arranged in the heat exchange chamber of other shells, wherein the temperature of the first heat exchange medium is higher than that of the second heat exchange medium, so that the last shell achieves a heat preservation function, or the specific heat capacity of the first heat exchange medium is smaller than that of the second heat exchange medium, so that the last shell achieves a heat preservation function. For example, if it is desired to reduce the temperature of the hot fluid from 85 ℃ to 40 ℃, then 10 ℃ of water may be provided in the first housing to reduce the temperature of the hot fluid from 85 ℃ to 50 ℃ and 20 ℃ of water may be provided in the second housing to reduce the temperature of the hot fluid from 50 ℃ to 40 ℃; of course, a first heat exchange medium with smaller specific heat capacity at 10 ℃ can be arranged in the second shell, and at the moment, the temperature rise speed of the first heat exchange medium is higher, so that the temperature difference between the hot fluid and the first heat exchange medium is reduced faster, the temperature reduction speed of the hot fluid is slower, and the hot fluid is ensured to be reduced from 50 ℃ to 40 ℃; of course, when the specific heat capacity of the hot fluid is smaller and the specific heat capacity of the hot fluid is larger than that of water, the temperature of the hot fluid after passing through the first shell is reduced to about 40 ℃, and then water with larger specific heat capacity of 40 ℃ is introduced into the second shell, so that the temperature of the hot fluid is basically unchanged even if the heat capacity of part of the hot fluid is absorbed due to the larger specific heat capacity of the water, and the temperature of the hot fluid is ensured to be 40 ℃.

In order to facilitate sealing between two adjacent shells, in this embodiment, as shown in fig. 1-4, a sealing ring 11 is disposed between two adjacent shells, and the sealing ring 11 and two adjacent tube plates of two adjacent shells jointly enclose a transit chamber 12. The two ends of the shell 5 are provided with flanges 6, two adjacent shells are connected in a sealing way through the flanges 6, and a sealing ring 11 is arranged between the flanges of the two adjacent shells. In the present embodiment, the inlet seal head 1 and the outlet seal head 7 are also respectively connected with the housing 5 in a sealing manner through the flange 6, but in other embodiments, the inlet seal head 1 and the outlet seal head 7 may be connected with the housing 5 in a sealing manner through welding.

Through setting up sealing washer 11, can make sealing washer 11 and two adjacent tube sheets enclose into transfer cavity 12 jointly when realizing the sealing connection of two adjacent casings, simple structure. The two adjacent housings can be conveniently connected in a sealing manner by means of the flange 6.

In order to facilitate the provision of the transfer chamber 12 and the assembly of the shells 5, in the present embodiment, as shown in fig. 1 to 4, in the connection ends where the adjacent two shells are connected, the connection end of at least one shell 5 has a projection projecting from the end tube sheet 9 in the axial direction, and the projection and the adjacent two tube sheets of the adjacent two shells enclose the transfer chamber 12 together. Both ends of each shell are provided with protruding parts.

By making one end of the housing 5 protrude from the tube plate 9 at the end of the housing 5 to form a protruding portion, the protruding portion of the housing 5 and two adjacent tube plates of two adjacent housings can jointly enclose a transfer chamber 12, and the structure is simple. For the technical scheme that one end of each shell protrudes out of the corresponding tube plate 9, when the two shells are in butt joint, the front side and the back side of each shell do not need to be distinguished, so that the butt joint of the parts, which do not protrude out of the corresponding tube plate 9, of the two shells is avoided, and the installation is convenient.

In order to further improve the heat exchange efficiency, in this embodiment, as shown in fig. 4, each housing is provided with at least two heat exchange tubes 10, and in two adjacent housings, at least one heat exchange tube 10 in one housing 5 and all heat exchange tubes 10 in the other housing 5 are arranged in a staggered manner. In other embodiments, the number of heat exchange tubes 10 may be three, four or more, the number of heat exchange tubes 10 in two housings may be the same or different, and all heat exchange tubes 10 in one housing 5 may be offset from all heat exchange tubes 10 in another housing 5.

By arranging at least one heat exchange tube 10 in one shell 5 and all heat exchange tubes 10 in the other shell 5 in a staggered manner, the heat exchange liquid flowing out of the heat exchange tube 10 can be prevented from directly entering the heat exchange tube 10 of the other shell 5 when the length of the transfer chamber 12 is too small, or the heat exchange liquid flowing out of the heat exchange tube 10 of the other shell 5 can be prevented from directly flowing into the heat exchange tube 10, so that the heat exchange liquid can be ensured to impinge on the downstream tube plate 9 after flowing out of the upstream heat exchange tube 10, the stirring of the liquid in the transfer chamber 12 is realized, the heat exchange efficiency of the heat exchange tube 10 at the transfer chamber 12 and the downstream is further improved, and finally the heat exchange efficiency of the whole tubular heat exchanger is improved.

In order to facilitate observation of the temperature of the heat exchange liquid before and after heat exchange, in this embodiment, temperature detection devices for detecting the temperature of the heat exchange liquid in the inflow chamber or the outflow chamber are further disposed on the inflow end enclosure 1 and the outflow end enclosure 7. In the present embodiment, the temperature detecting device is a thermometer, but in other embodiments, the temperature detecting device may be a temperature detecting device such as a temperature sensor. The temperature detection device can conveniently obtain the temperature of the heat exchange liquid before and after heat exchange.

In order to facilitate the replacement of the heat exchange medium in each heat exchange chamber, in this embodiment, a heat exchange medium inlet 3 and a heat exchange medium outlet 4 are further provided on each housing and are in communication with each heat exchange chamber. Specifically, the heat exchange medium inlet 3 is disposed below the housing 5, and the heat exchange medium outlet 4 is disposed above the housing 5 to better utilize the heat exchange medium. In other embodiments, the heat exchange medium inlet 3 may be disposed above the housing 5, and the heat exchange medium outlet 4 may be disposed below the housing 5, as desired. That is, it is only necessary to ensure that the shell 5 is provided with the heat exchange medium inlet 3 and the heat exchange medium outlet 4, and the specific positions of the heat exchange medium inlet 3 and the heat exchange medium outlet 4 can be any positions on the shell. Of course, in other embodiments, the heat exchange medium inlet 3 and the heat exchange medium outlet 4 may not be provided according to actual needs, or only one liquid exchange port is provided on the casing, and the liquid exchange port is the heat exchange medium inlet 3 and the heat exchange medium outlet 4 at the same time.

The heat exchange medium in the heat exchange cavity of each shell can be conveniently replaced by arranging the heat exchange medium inlet 3 and the heat exchange medium outlet 4, so that the temperature difference between the heat exchange medium in each heat exchange cavity and the heat exchange liquid is ensured to be large, and the heat exchange efficiency is improved.

When in use, firstly, heat exchange liquid is injected from the heat exchange liquid inlet 2, flows into the heat exchange tube 10 after passing through the inflow cavity, and exchanges heat with a heat exchange medium in the heat exchange cavity in the heat exchange tube 10; then, the heat exchange liquid flows into the transfer chamber 12 from the heat exchange tube 10 and exchanges heat with the heat exchange medium at two sides of the transfer chamber 12 in the transfer chamber 12; then, the heat exchange liquid flows into the heat exchange tube 10 of the next stage, and exchanges heat with the heat exchange medium in the heat exchange cavity in the heat exchange tube 10; finally, the heat exchange liquid flows into the outflow chamber and out of the heat exchange liquid outflow opening 8. When three or more housings 5 are provided, the heat exchange liquid passes through the process of "upstream heat exchange tube 10-intermediate chamber 12-downstream heat exchange tube 10" a plurality of times. During cleaning, the inflow end socket or the outflow end socket is detached for cleaning as in the prior art, and the shells can be detached for cleaning respectively.

Specific example 2 of the tubular heat exchanger provided by the utility model:

The purpose of this embodiment is to provide a different sealing manner for adjacent housings, and the main difference between this embodiment and embodiment 1 is that: in this embodiment, the sealing ring is disposed between the flanges, and the adjacent housings are connected in a sealing manner by a snap connection. Specifically, the mode that uses dead lever and lockpin carries out the buckle and fixes, is equipped with the perforation on the flange, and the dead lever includes the stopper head and connects the body of rod on the stopper head, is equipped with the through-hole along dead lever radial direction on the body of rod. When the fixing rod is used, the fixing rod passes through the through holes on the two adjacent flanges along the axial direction of the fixing rod, then the lock pin is inserted into the through holes, and the lock pin and the stop head clamp the two adjacent flanges so as to realize the sealing between the adjacent shells.

Specific example 3 of the tubular heat exchanger provided by the utility model:

The purpose of this embodiment is to provide different setting modes of the sealing ring, and the main difference between this embodiment and the specific embodiment 1 is that: in this embodiment, not including the flange, all be equipped with the mounting groove on two adjacent terminal surfaces of two adjacent casings, the sealing washer sets up in the mounting groove, realizes sealing connection through the mode of buckle connection between the adjacent casing. Specifically, the mode of using dead lever and lockpin carries out the buckle fixedly, forms the fixed block (or directly welds the fixed block on the casing) along the radial outside protrusion of casing on the casing, is equipped with the perforation on the fixed block, and the dead lever includes the stopper head and connects the body of rod on the stopper head, is equipped with the through-hole along dead lever radial direction on the body of rod. When the sealing device is used, the fixing rod passes through the through holes of the two adjacent fixing blocks along the axial direction of the fixing rod, then the lock pin is inserted into the through holes, and the lock pin and the stop head clamp the two adjacent fixing blocks, so that the sealing between the adjacent shells is realized.

Specific example 4 of the tubular heat exchanger provided by the utility model:

The present embodiment aims to provide a different housing, and the main difference between the present embodiment and the specific embodiment 1 is that: in this embodiment, the end surfaces of both ends of the housing are flush with the end surfaces of the corresponding tube sheet (i.e., do not include a projection), and the transit chamber is formed only by the seal ring and the adjacent end plate.

Specific example 5 of the tubular heat exchanger provided by the utility model:

The present embodiment aims to provide a different housing, and the main difference between the present embodiment and the specific embodiment 1 is that: in this embodiment, one end of each housing is flush with the corresponding tube sheet, and the other end of the housing protrudes from the corresponding tube sheet (i.e., one end of the housing is provided with a protruding portion, and the other end is not provided with a protruding portion). When the shells are connected in sequence, the butt joint of one end of one shell flush with the corresponding tube plate and the end of the other shell protruding from the corresponding tube plate is ensured, so that a transfer cavity exists between the adjacent shells. Of course, when there are only two shells, it is also possible to butt-joint the two shells with each protruding from one end of the corresponding tube sheet to form a transfer chamber.

Specific example 6 of the tubular heat exchanger provided by the utility model:

The purpose of this embodiment is to provide different arrangement modes of heat exchange tubes, and the main difference between this embodiment and embodiment 1 is that: in this embodiment, only one heat exchange tube is disposed in at least one of the housings, and in two adjacent housings, at least one heat exchange tube in one housing may be arranged in a staggered manner or not with all heat exchange tubes in the other housing.

Specific example 7 of the tubular heat exchanger provided by the utility model:

The purpose of this embodiment is to provide another different arrangement mode of heat exchange tubes, and the main difference between this embodiment and embodiment 1 is that: in this embodiment, in the adjacent two cases, all the heat exchange tubes are arranged without dislocation. Specifically, the same number of heat exchange tubes may be provided in two housings, and each heat exchange tube in one housing is arranged opposite to one heat exchange tube in the other housing. Of course, it is also possible to have nine heat exchange tubes with smaller inner diameters in one shell and three heat exchange tubes with larger inner diameters in the other shell, wherein the heat exchange tubes are divided into three groups on the shell provided with nine heat exchange tubes, and each group of heat exchange tubes is arranged opposite to the heat exchange tubes on the other shell.

Specific example 8 of the tubular heat exchanger provided by the utility model:

An object of the present embodiment is to provide a tubular heat exchanger that does not include a temperature detecting device, and the main difference between the present embodiment and the specific embodiment 1 is that: in this embodiment, the tubular heat exchanger does not include a temperature detecting device, and the temperature of the heat exchange liquid before entering the tubular heat exchanger and the temperature of the heat exchange liquid after exiting the tubular heat exchanger may be directly detected.

Specific example 9 of the tubular heat exchanger provided by the utility model:

the purpose of this embodiment is to provide different arrangement modes of heat exchange tubes, and the main difference between this embodiment and embodiment 1 is that: in this embodiment, the heat exchange medium inlet and the heat exchange medium outlet are not provided on at least one of the housings. When the tubular heat exchanger is not required to be used for a long time, the heat exchange medium inlet and the heat exchange medium outlet are not arranged, and the heat exchange medium in the heat exchange cavity exchanges heat with the outside through the shell, so that the heat exchange medium is heated or cooled.

Finally, it should be noted that the foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited to the foregoing embodiments, but may be modified without inventive effort or equivalent replacement of some of the technical features thereof by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (8)

1. The utility model provides a tubular heat exchanger, includes inflow head, outflow head and connects the casing between inflow head and outflow head, is equipped with the heat transfer liquid inlet on the inflow head, is equipped with the heat transfer liquid outlet on the outflow head, and the both ends of casing are equipped with the tube sheet, still are equipped with the heat exchange tube in the casing, and the both ends of heat exchange tube are sealing connection respectively on the tube sheet at casing both ends, its characterized in that, between inflow head and the outflow head in proper order sealing connection have at least two the casing, the tube sheet that is close to inflow head in the casing that is connected with inflow head encloses into inflow cavity with inflow head, encloses into outflow cavity with outflow head in the casing that is connected with outflow head, encloses into heat transfer cavity between the tube sheet at each casing both ends, encloses into the well-transfer cavity that is used for transferring heat transfer liquid between the adjacent two casings, inflow cavity and outflow cavity are through heat exchange tube and well-transfer cavity intercommunication.

2. A tubular heat exchanger as claimed in claim 1 wherein a sealing ring is provided between adjacent two of the shells, the sealing ring and adjacent two tube sheets of the adjacent two shells together enclosing a transfer chamber.

3. A tubular heat exchanger as claimed in claim 2 wherein the two ends of the housing are provided with flanges, adjacent housings are sealingly connected by means of flanges, and a sealing ring is provided between the flanges of the adjacent housings.

4. A tube heat exchanger according to any one of claims 1-3, wherein, in the connecting ends of the adjacent two shells, the connecting end of at least one shell has a projection projecting in the axial direction from the end tube sheet, the projection enclosing a transfer chamber together with the adjacent two tube sheets of the adjacent two shells.

5. A tubular heat exchanger as claimed in claim 4, wherein each of the two ends of the housing is provided with said projection.

6. A tubular heat exchanger according to any one of claims 1-3, wherein each shell is provided with at least two heat exchange tubes, and wherein at least one heat exchange tube in one shell and all heat exchange tubes in the other shell are arranged in a staggered manner in two adjacent shells.

7. A tubular heat exchanger according to any one of claims 1-3, wherein temperature detecting means for detecting the temperature of the heat exchanging liquid in the inflow chamber or the outflow chamber are further provided on the inflow header and the outflow header.

8. A tubular heat exchanger as claimed in any one of claims 1 to 3 wherein a heat exchange medium inlet and a heat exchange medium outlet are provided in each housing in communication with each heat exchange chamber.