JPH0614778U - Heat exchanger - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent leakage of the liquid to be cooled from the O-ring floating tube plate in the heat exchanger. [Structure] Reamer bolt 17 that passes through body flange 14, spacer 8 and water return chamber flange 15 and tightens them
By providing the eccentricity between the floating tube plate 7 and the spacer 8, the concentricity of the body flange 14, the spacer 8 and the water return chamber flange 15 is matched, and thereby the gap between the floating tube plate 7 and the spacer 8 is made constant. To prevent the O-ring surface pressure from decreasing. [Effect] The sealing performance of the O-ring sealing portion is improved, and the leakage of the cooling liquid and the liquid to be cooled is prevented.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a heat exchanger that prevents fluid leakage from the O-ring floating tube plate portion.

[0002]

[Prior art]

 3 and 4 are partial cross-sections showing the conventional heat exchanger shown in, for example, the product catalog “Floating tube plate water-cooled oil cooler” (Tada Electric Co., Ltd., Catalog No. DTA3087, issued in 1985). It is a figure and the left side view. In the figure, 1 is a body of a heat exchanger, 2 is a water chamber joined to the side of this body, and a water chamber for passing cooling water, 3 is a return chamber for passing cooling water, which is connected to the opposite side of the water chamber 2. The water chambers 4 are arranged in the axial direction of the body for cooling tubes for exchanging heat between the cooling water and the liquid to be cooled. Reference numeral 5 denotes a bundle of cooling pipes 4 provided in the body 1 for the liquid to be cooled. A baffle plate that bends the flow of the liquid to be cooled to increase the efficiency of heat exchange, 6 is a fixed tube plate that fixes the cooling tube 4, and 7 is arranged on the opposite side of the fixed tube plate 6 and fixes the cooling tube. Along with that, the cooling tube 4 expands and contracts according to the temperature level so that the cooling tube 4 can be freely moved so as not to affect the body 1 to prevent damage to the cooling tube 4, and 8 is a floating tube plate. A spacer for forming an O-ring seal portion in the portion, 9 indicates that the cooling water and the water to be cooled are mixed even if the floating tube plate 7 moves. The O-ring 10, which is inserted between the body 1 and the spacer 8 and between the water return chamber 3 and the spacer 8 so as not to seal, seals the cooling water through the water chamber 2 into the cooling pipe 4 in the body 1. Cooling water inlet pipe, 11 is a cooling water outlet pipe for discharging the cooling water to the outside, 12 is an inlet pipe for flowing the liquid to be cooled into the body 1, and 13 is an outlet pipe for discharging the liquid to be cooled to the outside of the body 1. is there.

Next, the operation will be described. When the liquid to be cooled flows in through the inlet pipe 12, flows in the body 1, and flows out of the body 1 through the outlet pipe 13, cooling water flows in through the cooling water inlet pipe 10 and is supplied from the water chamber 2. After passing through the cooling pipe 4, it returns to the water chamber 2 and is discharged from the cooling water outlet pipe 11. At that time, the liquid to be cooled flows in contact with the outer surface of the cooling pipe 4, so that a temperature difference occurs between the inner and outer surfaces of the cooling pipe 4, and heat is exchanged from a higher temperature to a lower temperature to become a cooled liquid to be cooled. Are discharged to the outside. However, since the relative relationship between the positions of the cooling tubes 4 and the body 1 changes depending on the respective temperatures, if the fixed tube plates 6 to which a plurality of cooling tubes 4 are attached are provided at both ends and are fixed, the cooling tubes 4 will not change in temperature. It expands and contracts depending on the height, and there is a possibility of damage. Therefore, one side has an outer diameter slightly smaller than that of the body 1 and the water return chamber 3 like the floating tube plate 7 so as to freely move as the cooling tube 4 expands and contracts. Therefore, there is a certain gap between the floating tube plate 7 and the body 1 and the water return chamber 3, so that the body 1 and the water return chamber 3 are prevented from being mixed with each other so that the cooling water and the cooled water do not mix with each other. A spacer 8 is provided at the same time, and an O-ring 9 is inserted so that the floating tube plate 7 can be sealed even if it moves. Further, the O-ring 9 is compressed for sealing and is mounted on the spacer 8 and the floating tube plate 7 at limited places. FIG. 5 is a detailed view of the portion A in FIG. 3, showing an example of the groove shape of the spacer 8 to which the O-ring 9 is attached. In the figure, 14 is a body flange, 15 is a water return chamber flange, and 16 is a spacer leakage detection hole.

[0004]

[Problems to be solved by the device]

 The conventional heat exchanger is configured as described above, and as shown in FIG. 5, with respect to the cross-sectional area of the O-ring 9, the O-ring groove of the spacer 8 and the body flange 14 or the water return chamber flange 15 is formed. The cross-sectional areas are almost equal. However, the eccentricity between the floating tube plate 7 and the spacer 8 and the concentricity of the body flange 14, the spacer 8 and the water chamber flange 15 may not match, so as shown in FIG. However, there is a problem in that the area compression rate becomes small even when using, and the cooling liquid and the liquid to be cooled leak from the O-ring sealed portion.

The present invention has been made in order to solve the above problems, and an object of the present invention is to obtain a heat exchanger in which the cooling liquid and the liquid to be cooled do not leak from the O-ring sealing portion on the floating tube plate side. To aim.

[0006]

[Means for Solving the Problems]

 The heat exchanger according to the present invention is provided with a reamer bolt for positioning the body flange, the spacer, and the return chamber flange.

[0007]

[Action]

 The heat exchanger according to the present invention is provided with the reamer bolts for positioning the body flange, the spacer and the return chamber flange, so that the concentricity of the body flange, the spacer and the water chamber flange can be easily adjusted.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. 1 is a right side view of a heat exchanger showing an embodiment of the present invention, and FIG. 2 is a sectional view taken along line BB of FIG. In these figures, the reference numerals 2, 7, 9, 12, 14, and 15 are the same as those in the conventional heat exchanger, and therefore their explanations are omitted. Reference numeral 17 is a reamer bolt for positioning the body flange 14, the spacer 8 and the water return chamber flange 15, and 18 is a nut for fixing the reamer bolt. The rest of the configuration is similar to that of the conventional example.

Next, the operation will be described. Since the action of cooling the liquid to be cooled is similar to that of the conventional device, its explanation is omitted. The reamer bolts 17 as shown in FIG. 2 are arranged at two locations on the circumference as shown in FIG. 1, and thereby the concentricity of the body flange 14 and the return chamber flange 15 and the spacer 8 are adjusted to allow the floating tube plate 7 By keeping the gap between the spacer 8 and the spacer 8 constant, the cross-sectional area of the O-ring groove constituted by the spacer 8 and the body flange 14 or the water return chamber flange 15 is made constant to prevent the reduction of the surface pressure.

[0010]

[Effect of device]

 As described above, according to the present invention, the O-ring mounted on the sealed portion between the floating tube plate and the spacer is provided by providing the reamer bolts for positioning the body flange, the spacer, and the return water chamber flange and adjusting the concentricity. By keeping the area compression rate of and constant, the sealing performance is improved and the cooling liquid and the cooled liquid are prevented from leaking from the O-ring sealing part.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line BB of FIG.

FIG. 3 is a partial cross-sectional view showing a conventional heat exchanger.

FIG. 4 is a left side view of FIG.

5 is a detailed view of a portion A of FIG.

FIG. 6 is a detailed view of part A of FIG.

[Explanation of symbols]

 1 Body 2 Water Chamber 3 Water Return Chamber 4 Cooling Tube 5 Baffle Plate 6 Fixed Tube Plate 7 Floating Tube Plate 8 Spacer 9 O-ring 14 Body Flange 15 Water Return Chamber Flange 17 Reamer Bolt

Claims (1)

[Scope of utility model registration request] 1. A water chamber and a water return chamber are provided on both sides of the body, and both ends of a cooling pipe provided in an axial direction in the body are supported by fixed tube plates on the water chamber side, and the water return chamber side. Is supported by a movable floating tube plate, a spacer is sandwiched between the body flange and the return chamber flange, and an O ring inserted into an O ring groove provided in this spacer seals the floating tube plate. In the heat exchanger, the heat exchanger is provided with a positioning reamer bolt for penetrating the body flange, the spacer, and the water return chamber flange portion to match the concentricity thereof.