RU197309U1 - Dismountable heat exchanger with tubes - Google Patents

Abstract

Collapsible heat exchanger with tubes belongs to the field of heat exchangers. In a utility model, the first ends of the heat transfer pipes are welded into the first pipe wall, wherein the first pipe wall is connected by means of a bolted collar connection through a gasket to the first cap to form a sealed cavity for free flow of the heat transfer medium between the heat transfer pipes. The second ends of the heat-transfer pipes are welded into the second pipe wall, while the second pipe wall is connected via a bolt-in-place connection through a gasket to the second cover with the formation of an airtight cavity for free flow of the heat transfer medium between the heat-transfer pipes. The utility model can be used in central air conditioning installations at nuclear facilities. Each tube wall has a milled groove, and the corresponding heat exchanger cover has a protrusion corresponding to the specified groove. Achievable technical result - ensuring accurate positioning of the cover. 3 s.p. f-ly, 8 ill.

Description

The technical field to which the utility model belongs.

The utility model relates to the field of heat exchangers, namely to collapsible heat exchangers with tubes in which the first ends of the heat-transfer pipes are welded into the first pipe wall, while the first pipe wall is connected through a bolt collapsible connection through a gasket to the first cover with the formation of a sealed cavity for free flow of coolant between the heat pipes, while the second ends of the heat pipes are welded into the second pipe wall, while the second pipe wall is connected by bolt times boron connection through a gasket with a second cover with the formation of an airtight cavity for free flow of coolant between the heat transfer pipes, and can be used in central air conditioning installations at nuclear facilities.

The prior art.

Collapsible heat exchangers with tubes are used both for heating and for cooling the vapor-air medium passing through the surface of the tube bundle. As a heat carrier, chemically prepared water with a temperature regime of 150-70 ° C / 90-70 ° C (depending on requirements) and a vapor medium can be used. In cooling mode, both mains water and refrigerants can be used as a coolant.

Known heat exchanger collapsible with tubes, containing input and output chambers attached to the chambers of heat transfer elements made in the form of heat transfer pipes with external fins on the working surface, and the first ends of the heat transfer pipes are welded into the first pipe wall located opposite to the input and output cameras of the side, while the first pipe wall is connected by means of a bolt collapsible connection through a gasket with the first cover with the formation of a tight cavity the flow of heat transfer medium between the heat transfer pipes, while the second ends of the heat transfer pipes are welded into the second pipe wall located on the inlet and outlet chambers, the second pipe wall being connected via a collapsible bolt connection through a gasket to the second cover with the formation of an airtight cavity for free flow of heat transfer fluid between heat transfer pipes. (See patent for invention RU 2473034, published in 2013).

This device is the closest in technical essence to the claimed utility model and is taken as a prototype to the proposed utility model.

The disadvantage of the prototype is the lack of precise positioning of the cover (connection "stud-groove"). This also makes it difficult to assemble the heat exchanger. In addition, such a heat exchanger is not strong enough when it comes to high pressures inside it, if it is used in central air conditioning installations at nuclear facilities.

The totality of these shortcomings makes it impossible to use them in central air conditioning installations at nuclear facilities.

Disclosure of a utility model.

Based on this original observation, the present utility model mainly aims to offer a collapsible heat exchanger with tubes, in which the first ends of the heat transfer pipes are welded into the first pipe wall, while the first pipe wall is connected via a bolt collapsible connection through a gasket to the first cover to form a tight cavities for free flow of the heat carrier between the heat transfer pipes, while the second ends of the heat transfer pipes are welded into the second pipe wall, while the second pipe the wall is connected by means of a bolted collapsible connection through a gasket to the second cover with the formation of an airtight cavity for free flow of coolant between the heat transfer pipes, which allows at least to smooth out the above drawback, namely, to ensure the exact positioning of the cover (tongue-and-groove connection), which and is the technical task of this utility model.

To achieve this, each tube wall has a milled groove, and the corresponding heat exchanger cover has a protrusion corresponding to the specified groove.

Thanks to such advantageous characteristics, it becomes possible to more accurately position the cover (thorn-groove connection). In addition, this connection is one of the main elements of this design for holding pressure inside the heat exchanger.

There is a possible embodiment of the utility model in which a paronite gasket is located in the groove of the tube wall.

Thanks to this advantageous characteristic, it becomes possible to prevent leakage of liquid from the internal volume of the heat exchanger. Indeed, under a certain pressure, paronite turns into a viscous mass. In this form, it fills in the bumps, ensures tightness.

There is another possible embodiment of the utility model, in which a sealant is located in the groove of the tube wall.

Thanks to this advantageous characteristic, an alternative opportunity arises for preventing leakage of liquid from the internal volume of the heat exchanger.

There is another possible embodiment of the utility model, in which U-shaped plates are installed above and below the heat exchanger.

Thanks to this advantageous characteristic, it becomes possible to increase the strength of the structural characteristics.

The set of essential features of the proposed utility model is unknown from the prior art for devices of similar purpose, which allows us to conclude that the criterion of "novelty" for the utility model is met.

A brief description of the drawings.

Other distinguishing features and advantages of the utility model clearly follow from the description below for illustration and not being restrictive, with reference to the attached figure on which:

- figure 1 schematically depicts the appearance of a collapsible heat exchanger with tubes on one side, according to a utility model,

- figure 2 schematically depicts the appearance of a collapsible heat exchanger with tubes on the other hand, according to a utility model,

- figure 3 schematically depicts a fragment of a collapsible heat exchanger device with tubes, according to a utility model,

- figure 4 schematically depicts a fragment of a collapsible heat exchanger device with tubes, according to a utility model,

- figure 5 schematically depicts a collapsible heat exchanger device with tubes disassembled, according to a utility model,

- figure 6 schematically depicts another fragment of a collapsible heat exchanger device with tubes, according to a utility model,

- figure 7 schematically depicts another fragment of a collapsible heat exchanger device with tubes, according to a utility model,

- figure 8 schematically depicts another fragment of a collapsible heat exchanger device with tubes, according to a utility model.

According to figures 1-8, the heat exchanger comprises an inlet 1 and an outlet 2 chambers, heat-releasing elements connected to the chambers, made in the form of heat-releasing pipes 3 with external fins on the working surface, the first ends of the heat-releasing pipes 31 being welded into the first pipe wall 41 located on the opposite side with respect to the inlet and outlet chambers 1 and 2 of the side, while the first pipe wall 41 is connected by means of a bolt collapsible connection through a gasket to the first cover 51 with the formation of a sealed cavity the flow of coolant between the heat transfer pipes 3.

The second ends of the heat transfer pipes 32 are welded into the second pipe wall 42 located on the side of the inlet and outlet chambers 1 and 2, while the second pipe wall 42 is connected through a bolt collapsible connection through a gasket to the second cover 52 with the formation of a sealed cavity for free flow of heat transfer medium between the heat transfer pipes.

In each sealed cavity between the caps and pipe walls, there are barrier walls 6, the location and pitch of which is determined by thermal calculation based on the conditions of maximum heat removal.

U-shaped plates 7 are installed above and below the heat exchanger.

Each tube wall has a milled groove 8, and the corresponding heat exchanger cover has a protrusion 9 corresponding to the specified groove.

Arrows indicate the direction of fluid movement.

Implementation of a utility model.

The collapsible heat exchanger with tubes is used in a standard way. If necessary, remove the first and second covers. When mounting the protrusion 9 is placed in the groove 8.

Industrial applicability.

The proposed heat exchanger collapsible with tubes can be carried out by a specialist in practice and, when implemented, ensures the implementation of the declared purpose. The possibility of being implemented by a specialist in practice follows from the fact that for each feature included in the utility model formula based on the description, the material equivalent is known, which allows us to conclude that the criterion of “industrial applicability” for the utility model and the criterion of “completeness of disclosure” for the utility model are met .

In accordance with the utility model, the applicant made a prototype heat exchanger. This design was adapted for use in conditions of increased chemical activity of the coolant with an increased risk of deposits inside the heat transfer pipes.

The connection of the removable covers with the flange was bolted, the flanges with heat exchangers were welded by argon-arc welding. The rest of the body was welded by semi-automatic welding in a protective gas environment.

The orderly movement of the coolant inside it is provided by the barrier walls located on the removable covers. The wall pitch and thickness are determined by the heat calculation of the heat exchanger.

The groove deepening range is 2-4 mm.

The operating pressure of the heat exchanger is 10 to 12 bar.

Possible types of execution:

• case material:

- carbon steel;

- stainless steel;

• pipe material:

- stainless steel-copper;

- stainless steel-aluminum;

- copper-copper;

- aluminum-copper;

• number of rows: from 1 to 6.

So, due to the fact that each tube wall has a milled groove, and the corresponding heat exchanger cover is a protrusion corresponding to the specified groove and the claimed technical result is achieved - the possibility of more accurate positioning of the cover.

Additionally achieved technical result is:

- in improving reliability,

- the ability to provide maximum heat removal,

Summarizing the above, the task is solved in full. The utility model has improved performance in comparison with the prototype. The improvements made will expand the scope of the possible use of the heat exchanger, including for use in central air conditioning installations at nuclear facilities.

Claims (4)

1. The heat exchanger is collapsible with tubes, in which the first ends of the heat transfer pipes are welded into the first pipe wall, wherein the first pipe wall is connected by means of a bolt collapsible connection through a gasket to the first cover with the formation of an airtight cavity for free flow of heat carrier between the heat transfer pipes, while the second ends heat transfer pipes are welded into the second pipe wall, while the second pipe wall is connected through a bolt collapsible connection through a gasket to the second cover with the formation iem sealed cavity for free flow of coolant between the heat-transfer tubes, wherein each tube wall is milled a groove, and the corresponding heat exchanger cover - protrusion corresponding to said groove. 2. The heat exchanger according to claim 1, characterized in that a paronite gasket is located in the groove of the tube wall. 3. The heat exchanger according to claim 1, characterized in that a sealant is located in the groove of the pipe wall. 4. The heat exchanger according to claim 1, characterized in that U-shaped plates are installed above and below the heat exchanger.

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