JPH0596778U - Support structure for heat exchanger heat transfer tubes - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention relates to a support structure for heat exchanger tubes, and enhances the effect of suppressing vibration of the heat exchanger tubes by inserting support members into the mutual gaps of the heat exchanger tubes. [Structure] A flat tube-shaped support member is inserted into the mutual gap of the arranged heat transfer tubes to inflate them. When the insertion members are inserted, the heat transfer tubes are inserted without contacting the heat transfer tubes, and after the insertion, they are inflated. It is pressed against the heat pipe.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a heat exchanger tube support structure.

[0002]

[Prior Art]

 3 and 4 show a conventional example of a U-shaped tube heat exchanger. The U-shaped tube heat exchanger includes a plurality of U-shaped heat transfer tubes 4 provided in a cylindrical heat exchanger shell 1 supported by a base tube plate 2 and a plurality of baffle plates 3. At the same time, the water chamber casing 5 is arranged at the end of the heat exchanger shell 1 so as to cover the base tube sheet 2, and the interior is partitioned by the water chamber separator plate 6 arranged in the water chamber casing 5. An inlet plenum portion 7 and an outlet plenum portion 8 that are in communication with each other are formed for both openings of each heat transfer tube 4.

The baffle plates 3 are supported by the tie rods 9 on the tube plate 2, and are arranged at positions that are staggered in the radial direction of the heat exchanger shell 1 at intervals in the longitudinal direction. The inside of the heat exchanger shell 1 is partitioned along the longitudinal direction, and a meandering flow path is formed inside the heat exchanger shell 1.

The inlet plenum 7 and the outlet plenum 8 are provided with an in-pipe fluid inlet 10 and an in-pipe fluid outlet 11, and the heat exchanger shell 1 has an in-shell fluid inlet 12 and The shell internal fluid outlet 13 is provided, and heat exchange is performed by inserting a fluid as shown by each arrow in FIG.

[0005]

[Problems to be solved by the device]

 By the way, in such a heat exchanger, the heat transfer tube 4 and the baffle plate 3 supporting the heat transfer tube 4 cannot be completely fixed due to a problem in assembling, and as shown in FIG. The heat transfer tube 4 is inserted through the insertion hole 3a having a diameter slightly larger than the outer diameter of the heat tube 4.

However, there may be a phenomenon in which the vibration of the heat transfer tube 4 partially increases due to fluctuations in the flow velocity of the fluid inside the heat exchanger shell 1, and in particular, the flow velocity of the fluid in the heat exchange chamber 3 is high. In the case of a fluid or a gas-liquid mixed fluid, the tendency becomes remarkable. In such a case, the conventional baffle plate 3 should sufficiently suppress the vibration of the heat transfer tube 4. However, if the vibration becomes large, it is possible that the heat transfer tube 4 collides with the heat transfer tube 4 and damages it.

The present invention has been made in view of the above circumstances, and an object thereof is to effectively support the heat transfer tube and improve the durability of the heat transfer tube.

[0008]

[Means for Solving the Problems]

 As a means for solving the above-mentioned problems, the present invention comprises a flat tube-shaped support member that is pressed against the heat transfer tubes during expansion and is inserted into the mutual gap of the plurality of heat transfer tubes that are inserted inside the heat exchanger shell. The structure of the heat exchanger heat transfer tube is adopted.

[0009]

[Action]

 According to the heat exchanger heat transfer tube support structure of the present invention, the flat tube-shaped support members are inserted into the mutual gaps of the heat transfer tubes arranged at intervals inside the heat exchanger shell, Is expanded to bring the expanded surface of the support member into pressure contact with the heat transfer tube and restrain the vibration of the heat transfer tube.

[0010]

【Example】

 An embodiment of a support structure for a heat exchanger heat transfer tube according to the present invention will be described below with reference to FIGS. 1 and 2. In this embodiment, the same parts as those of the above-described conventional heat exchanger are designated by the same reference numerals to simplify the description.

The heat exchanger according to the embodiment includes a heat exchanger shell 1, a tube plate 2, a baffle plate 3 supported by tie rods 9 on the tube plate 2, and a plurality of heat transfer tubes 4 in an array state. 1 is common to the prior art example, but is different from the prior art example in that the supporting member 20 is inserted into the mutual gap G of the heat transfer tube 4 as shown in FIG.

As shown in FIG. 2, the support member 20 has a flat state in which two strip-shaped thin flat plate members 20a and 20b are overlapped and the edges of both flat plate members 20a and 20b along the longitudinal direction are welded. The sleeve-shaped one is further welded at one end to be closed to form a bag-shaped one. The thickness of the support member 20 is smaller than the mutual gap G of the heat transfer tubes 4.

In order to support the heat transfer tube 4 of the heat exchanger so as not to vibrate using the support member 20, a plurality of support members 20 are provided outside the heat exchanger shell 1 when the heat transfer tube 4 is assembled. As shown in FIG. 1, the heat transfer tubes 4 in the arrayed state are inserted into the mutual gaps G from two different directions, so that the heat transfer tubes 4 are arranged in a lattice shape as a whole. At the time of this insertion, the flat plate members 20a and 20b of the support member 20 are inserted so that the surfaces thereof face the adjacent heat transfer tubes 4, respectively.

At this time, since the supporting member 20 is formed so that the thickness thereof is smaller than the mutual gap G between the adjacent heat transfer tubes 4, friction does not occur with the heat transfer tube 4 during insertion, and accordingly, the heat transfer tube 4 is transferred. The heat tube 4 is not damaged.

Thereafter, compressed air is sent from the opening 21 at one end of the support member 20 which is not closed to inflate the support member 20 formed in a bag shape, and the surfaces of the flat plate members 20a and 20b are heat-transfer tubes 4 To be pressed into contact with. Then, in this state, the opening 21 into which the compressed air is sent is closed by welding or the like, and the supporting member 20 is held in a balloon shape, so that the supporting member 20 and the heat transfer tube 4 are held in contact with each other. Becomes

With this support member 20, the heat transfer tubes 4 arranged with a mutual gap G therebetween are integrated, and the support strength and the earthquake resistance are improved. Then, by inserting the heat transfer tube 4 with the support member 20 inserted into the mutual gap G into the heat exchanger shell 1 as described above, the heat exchanger in which the heat transfer tube 4 is supported by the support member 20 is formed. Can be configured.

<Other Embodiments> The following techniques can be adopted in the heat exchanger heat transfer tube support structure according to the present invention. Secure the support member to the baffle plate. Secure the support member to the tie rod. Fixing the support member by other fixing means. A flat balloon-shaped support member, in which a fluid is enclosed in advance in the support member, is inserted into the mutual gap of the heat transfer tubes and expanded by utilizing the temperature rise when the heat exchanger is used. Use other gas instead of air. The supporting member shall be replaced by a flat-plate welded structure, and the pipe shall be flat and crushed. The support member should be made of bimetal formed by combining metals with different thermal expansion coefficients. The support member is made of a shape memory alloy. The support member is composed of a bag body that expands due to the temperature rise of the internal fluid.

[0018]

[Effect of the device]

 As described above, according to the heat exchanger heat transfer tube support structure of the present invention, the flat tube-shaped support members are inserted into the gaps between the plurality of heat transfer tubes to inflate them. The following effects are achieved. (1) The support member is inserted so as not to rub against the heat transfer tube, and the support structure can be assembled without damaging the heat transfer tube. (2) Since the support member is brought into pressure contact with the heat transfer tube, vibration of the heat transfer tube is reliably suppressed, and durability of the heat transfer tube is improved. (3) Since the support member is inserted into the gap between the plurality of heat transfer tubes, the plurality of heat transfer tubes can be supported by inserting one support member.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a support structure of a heat exchanger heat transfer tube according to the present invention.

FIG. 2 is a perspective view showing a support member of the support structure of FIG.

FIG. 3 is a front sectional view showing a conventional example of a U-shaped tube heat exchanger.

FIG. 4 is a perspective view showing a conventional example of a support structure for a heat exchanger heat transfer tube.

[Explanation of symbols]

 1 heat exchanger shell 2 tube plate 3 baffle plate 3a insertion hole 4 heat transfer tube 5 water chamber casing 6 isolation plate 7 inlet plenum 8 outlet plenum 9 tie rod 10 pipe fluid inlet 11 pipe fluid outlet 12 shell fluid inlet 13 Outlet for fluid in shell 20 Support members 20a, 20b Flat plate material 21 Opening G Mutual gap

Claims (1)

[Scope of utility model registration request] 1. A heat exchanger characterized in that a flat tube-shaped support member, which is brought into pressure contact with the heat transfer tube during expansion, is inserted into a mutual gap of the plurality of heat transfer tubes inserted inside the heat exchanger shell. Support structure for heat transfer tubes.