JPH07218180A - Lateral heat exchanger - Google Patents

Abstract

PURPOSE:To prevent flow-out of fluid from drain and air vent openings of a partition plates during operating by providing the openings provided at the plate and a guide for guiding floated matter floated via the fluid in a water chamber to block the openings in vertical directions. CONSTITUTION:A water chamber 17 is divided by a partition plate 18c which is horizontally provided into upper and lower water chambers 17a, 17b. A circular opening 19c for discharging drain stored on an upper surface and discharging the air stored on a lower surface is provided at the plate 18c. A spherical float 20 having a diameter larger than that of the opening 19c is disposed on a lower surface of the opening 19c. A guide 21 is provided at a position of 1.5 to twice times as large as the diameter of the float 20 directly from the opening 19c around the float 20 and coupled at its upper end to the periphery of the opening 19c to support the float 20 at its lower part. Thus, the air of the lower surface of the plate 18c is discharged from the opening 19c until fluid is fully filled in the chamber 17b and the float 20 is floated to block the opening 19c.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention has a partition plate in a water chamber,
The present invention relates to a horizontal heat exchanger having a device for discharging drainage accumulated on the upper surface of a partition plate and air accumulated on the lower surface.

[0002]

2. Description of the Related Art Generally, a horizontal heat exchanger is applied when heat exchange is performed in a fluid having a large difference in thermal expansion and contraction and a violent flow. FIG. 7 shows an example of a vertical sectional view of a 4-pass horizontal heat exchanger. A large number of heat transfer tubes 2 are arranged in a horizontal layer in a cylindrical body 1, and are sandwiched between a base tube sheet 3 and a head tube sheet 4 provided at both ends of the body 1 and penetrated through them to be described later. It is connected to the water chamber. A baffle plate 5 that supports the heat transfer tubes 2 and partitions the inside of the body 1 and guides the flow of fluid in the body 1 is further provided in the body 1. In addition, the body 1 is provided with an inlet nozzle 6 in the upper portion in the vicinity of the base tube sheet 3.
An outlet nozzle 7 is provided in the lower part near the head tube plate 4.

An outer side of the base tube sheet 3 is provided with a cylindrical base casing 8 which is closed at one end by a lid 9 and is joined to the base tube sheet 3 at the other end. An inlet nozzle 10 is provided at the upper portion and an outlet nozzle is provided at the lower portion. 11 is provided. Further, on the outside of the head tube sheet 4, a casing 12 is provided which is closed at one end by a lid 13 and is joined to the head tube sheet 4 at the other end, and the vent valve 1 is provided on the upper portion.
4, a drain valve 15 is provided at the bottom. The base tube sheet 3, the base casing 8 and the lid 9 form a water chamber 16, and the head tube sheet 4, the head casing 12 and the lid 13 form a water chamber 17. Partition plates 18a, 18 are horizontally provided in the water chambers 16, 17, respectively.
b and 18c are provided, and together with the heat transfer tube 2, form a 4-pass flow path. Each partition plate 18a, 18b, 18c is provided with openings 19a, 19b, 19c for removing air and draining.

A fluid flows in from the inlet nozzle 6 of the body 1 as shown by the broken line and is discharged from the output nozzle 7, and a fluid flows from the inlet nozzle 10 of the base casing 8 as shown by the solid line to the water chamber 16 , 17 and heat is exchanged in the heat transfer tube 2 and discharged from the outlet nozzle 11.

[0005]

The water chamber of the horizontal heat exchanger is provided with a drain valve and a vent valve so that drain and air can escape. In the case of a horizontal heat exchanger, a partition plate is installed horizontally in the water chamber, so when the fluid in the water chamber is drained, drain remains on the upper surface of the partition plate, and when fluid is injected into the water chamber, air remains on the lower surface of the partition plate. To do. In the case of the heat exchanger shown in FIG. 7, drain remains on the water chamber partition plate 18a and drain and air remain on the partition plate 18b. In the water chamber 17, drain and air remain on the partition plate 18c.

If the drain remains, corrosion will occur in the parts in contact with the heat exchanger when it is out of operation, and if air remains, it will cause pressure fluctuations in the working fluid during operation, and corrosion when stored due to water replacement. Cause of. For this reason, conventionally, an opening 19 is provided in the partition plate 18 to allow drainage and air to escape. However, when the opening 19 is provided in this way,
During operation, the working fluid flows in through this opening 19 and bypasses a part of the heat transfer tube 2, so that the heat efficiency of the heat exchanger decreases. Although FIG. 7 has explained the 4-pass heat exchanger, in the case of the horizontal heat exchanger, the partition plate is provided horizontally, so that the above-mentioned problem always occurs.

The present invention has been made in view of the above-mentioned problems, and is a horizontal heat exchange provided with a device for preventing the outflow of the fluid during operation from the drain and the air vent opening of the partition plate provided horizontally in the water chamber. The purpose is to provide a container.

[0008]

In order to achieve the above-mentioned object, a heat transfer tube having both ends supported by tube sheets and arranged in a plurality of horizontal layers, and a water chamber arranged outside the tube sheet and electrically connected to the heat transfer tubes. In a horizontal heat exchanger having a partition plate that is horizontally provided in the water chamber and forms a flow path in the water chamber corresponding to the heat transfer tubes, an opening provided in the partition plate and a fluid in the water chamber. And a guide portion for guiding the floating body in the vertical direction.

[0009]

[Function] When the fluid flows into the horizontal heat exchanger and the water chamber is filled with the fluid, the floating body rises along the guide portion and closes the opening of the partition plate. Air passes through the opening and flows upward. After the blockage, the fluid does not pass through the opening and bypasses a part of the heat transfer tube during the operation, so that the thermal efficiency of the heat exchanger does not decrease. Further, when the fluid is discharged, the floating body descends along the guide portion, so that the fluid remaining from the opening is discharged as drain.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows the configuration of the first embodiment of the present invention, (a) shows the overall structure of the water chamber, (b) shows a detailed view of the floating body and the guide portion provided in the opening of the partition plate,
(C) shows the XX sectional view of (b). The water chamber is shown in Figure 7.
Although the water chamber 17 on the side of the head tube sheet 4 is shown, the present embodiment can be similarly applied to the water chamber 16. Figure 7
The same reference numerals as in FIG.

A partition plate 18 horizontally provided in the water chamber 17.
It is divided into an upper water chamber 17a and a lower water chamber 17b by c, and a partition plate 18c is provided with a circular opening 19c for discharging drain accumulated on the upper surface and discharging air accumulated on the lower surface. A spherical floating body 20 having a diameter larger than that of the opening 19c is arranged on the lower surface of the opening 19c. A guide portion 21 is provided to surround the floating body 20 at a position about 1.5 to twice the diameter of the floating body 20 from immediately below the opening 19c, and is connected to the periphery of the opening 19c at the upper end and supports the floating body 20 at the lower part. Is configured. As a result, the water chamber 17
The air on the lower surface of the partition plate 18c is discharged from the opening 19c until the floating body 20 floats up and the floating body 20 floats up and closes the opening 19c. The air in the upper water chamber 17a is vented to the vent valve 1
It is discharged from 4. Since the water chambers are filled with the fluid during the operation of the heat exchanger, the floating body 20 closes the openings 19c. As a result, the flow bypassing the opening 19c is not generated and the thermal efficiency of the heat exchanger does not decrease. In addition, the water chamber 17a,
When the fluid of 17b is removed, the floating body 20 falls and the guide portion 21
The fluid retained in the lower part of the
It is discharged from c.

As shown in FIG. 1C, the guide portion 21 is provided with slits 22 in the vertical direction, and the partition plate 18 is provided.
The air accumulated on the lower surface of c and the drain from the upper surface are discharged,
When the water chamber 17b is filled with a fluid, this fluid flows into the guide portion 21.

Next, a second embodiment will be described. FIG. 2 shows the overall structure of the water chamber of this embodiment. This embodiment is applied to the water chamber 16 on the base tube sheet 3 side shown in FIG. 7, and those having the same function are denoted by the same reference numerals. Partition plates 18a, 18b
Thus, the water chamber 16 is divided into an upper water chamber 16a, a middle water chamber 16b, and a lower water chamber 16c, and the partition plates 18a and 18b are provided with openings 19a, 19b at the same positions, respectively. Plugs 30 are attached to the openings 19a and 19b, the respective plugs 30 are connected by a rod 32, and a floating body 31 is connected to the upper part of the plug 30 of the upper partition plate 18a.

FIG. 3 shows details of the plug 30 and the opening 19.
(A) is sectional drawing, (b) shows the XX arrow line view when the partition plate 18 is absent. The stopper 30 is a body portion 33 having a diameter smaller than that of the opening 19, and a disk provided at the top thereof and having a diameter larger than that of the opening 19 and is tapered downward so that the diameter of the lower side is the opening 1.
9, a stopper 34 having substantially the same size as that of 9, and a closing portion 35 having a diameter equal to that of the trunk portion 33, which is tapered upward with a disk provided at the lower end of the trunk portion 33 and having a diameter larger than the opening 19. As shown in FIG. 3B, the stopper 34 is provided with a cross-shaped groove 36 so that drains and air can pass therethrough.

The upper portion and the lower portion of the opening 19 are also tapered to match the taper of the stopper 34 and the closing portion 35 of the stopper 30. As shown in FIG. 3A, when the stopper 34 is in contact with the partition plate 18, the length of the body portion 33 is the closing portion 35.
The taper portion at the lower part of the opening constitutes a gap and is dimensioned so that drain and air can pass through.

FIG. 4 (a) shows a state in which the drain is dropped from the plug 30 and the opening 19 when the operation of the heat exchanger is finished and the working fluid is discharged, and FIG. 4 (b) shows the water chamber on the lower surface of the partition plate 18. It shows a state in which air is discharged from the gap between the stopper 30 and the opening 19 when the fluid flows in. In the case of (a), drain remains on the upper surface of the partition plate 18, and in the case of (b), air remains on the lower surface of the partition plate 18. Floating body 31 connected to stopper 30
Since the buoyancy of the fluid does not act on the stopper 30, the stopper 30 falls and the tapered portion of the stopper 34 is in contact with the tapered portion of the opening 19. The drain drops through the groove 36, and the air rises up through the groove 36.

FIG. 5 shows a state in which the upper water chamber 16a is filled with fluid and buoyancy acts on the floating body 31 to close the openings 19a and 19b. Since the taper portion of the closing portion 35 contacts the taper portion of the lower surface of the opening and closes the openings 19a and 19b, the fluid is not bypassed from the opening 19 of the partition plate 18, and the thermal efficiency of the heat exchanger can be prevented from lowering. . Also,
Since each stopper 30 is connected by the rod 32 and each opening 19 serves as a guide, the vertical movement is smoothly performed.

Next, a third embodiment will be described. In this embodiment, the openings 19a and 19b shown in FIG. 2 are provided with stoppers made of a floating body. FIG. 6 shows the stopper 40 of this embodiment. The shape is the same as that of the stopper 30 except that a stopper 34a in which the shape of the upper portion of the stopper 34 of the stopper 30 shown in FIG. 3 is enlarged is used. As the material, plastic or the like having a smaller specific gravity than the working fluid of the heat exchanger is used. Since the stopper 34a is made large and the center of buoyancy is set upward, even if the lower surface of the partition plate 18 is filled with fluid, the stopper 40 does not float and the flow passage to the upper surface is not blocked, so the air remaining on the lower surface can be removed. Will be easier. This embodiment can also be applied to the partition plate 18c of the water chamber 17 shown in FIG.

Although the above description is for a 4-pass horizontal heat exchanger, the present invention can be applied to a horizontal heat exchanger because a horizontal partition plate is provided in the water chamber. In addition,
Although the partition plate 18 is provided with one opening 19 in the above-described embodiment, it may be provided with an appropriate number. Further, the number and size of the grooves 36 provided in the stopper 34 may be set appropriately.

[0020]

As is apparent from the above description, according to the present invention, the opening of the horizontal partition plate is closed during the operation of the heat exchanger and the opening is released when the heat exchanger is stopped. It is possible to prevent the heat efficiency of the heat exchanger from being lowered, and to discharge the drain from the opening at the time of stop or discharge the air staying on the lower surface of the partition plate from the opening when filling the water chamber with the fluid.

[Brief description of drawings]

1 shows the configuration of the present invention, (a) shows the overall structure of the water chamber, (b) shows a detailed view of the floating body and the guide member provided in the opening of the partition plate, (c) shows The XX sectional view of (b) is shown.

FIG. 2 is a diagram showing an overall structure of a water chamber of a second embodiment.

3A and 3B show details of the stopper 30 and the opening 7, FIG. 3A is a sectional view, and FIG. 3B is a view taken along the line XX when the partition plate is not provided.

4A and 4B are diagrams showing a state in which a drain is discharged and a state in which a plug is dropped, and FIG. 4B is a state in which air is discharged.

FIG. 5 is a view showing a state in which the stopper floats and closes the opening.

FIG. 6 shows a sectional view of a stopper and an opening of the third embodiment.

FIG. 7 is a diagram showing a configuration of a conventional 4-pass horizontal heat exchanger.

[Explanation of symbols]

 1 Body 2 Heat Transfer Tube 3 Base Tube Plate 4 Head Tube Plate 8 Base Casing 9,13 Lid 10 Inlet Nozzle 11 Outlet Nozzle 12 Head Casing 14 Vent Valve 15 Drain Valve 16,17 Water Chamber 16a, 17a Upper Water Chamber 16b Middle Section Water chamber 16c, 17b Lower water chamber 18, 18a, 18b, 18c Partition plate 19, 19a, 19b, 19c Opening 20, 31 Floating body 21 Guide part 30, 40 Plug 32 Bar body 33 Body part 34, 34a Stopper 35 Closing part 36 groove

Claims (1)

[Claims] 1. A heat transfer tube having both ends thereof supported by a tube sheet and horizontally arranged in a plurality of layers, a water chamber arranged outside the tube sheet and electrically connected to the heat transfer tube, and a heat transfer tube horizontally provided in the water chamber. In a horizontal heat exchanger provided with a partition plate that forms a flow path in the water chamber corresponding to the above, an opening provided in the partition plate and a floating that floats by the fluid in the water chamber and closes the opening. A horizontal heat exchanger comprising a body and a guide portion for guiding the floating body in a vertical direction.