JPH0539341Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a plate heat exchanger used for heat exchange in various industries.

[Conventional technology]

In general, a plate heat exchanger consists of a heat transfer plate with wavy ribs and protrusions formed by press working between a fixed frame and a movable frame provided with flow holes for the inflow or outflow of the heat exchange medium. By arranging the required number of heat transfer plates in a stacked state via a gasket, and passing different heat exchange media alternately into the space formed between each heat transfer plate,
Heat exchange is performed between two types of heat exchange media.

By the way, when a corrosive heat exchange medium is used for heat exchange in the plate heat exchanger, the heat transfer plate that contacts the medium over almost the entire surface is made of a corrosion-resistant material. However, for the fixed frame and moving frame where only the flow holes for the inflow or outflow of the heat exchange medium come into contact with the medium, carbon steel plates are used in consideration of cost, and only around the flow holes are used. Rubber boots are installed to prevent corrosion from media.

Fig. 3 shows an example of how the rubber boots are installed. In the figure, 1 is one frame on the fixed side or moving side of the plate heat exchanger, and a gasket 2 is installed between it and the other frame (not shown). , 2, . . . are arranged in a stacked state in a required number of heat transfer plates 3, 3, . Reference numeral 4 denotes a flow hole for the inflow or outflow of the heat exchange medium, which is bored in the frame 1;
It has annular step portions 4a, 4a at both ends. Reference numeral 5 denotes a rubber boot with a groove-shaped cross section attached to the circulation hole 4, which is inserted into the circulation hole 4 and has flanges 5a at both ends.
5a is fitted into the circulation hole 4 by fitting into the annular stepped portions 4a, 4a. Incidentally, reference numeral 6 denotes a piping connection flange fixed to the outer end surface of the frame 1 with stud bolts 7a and nuts 7b.

[Problem to be solved by the invention] By the way, in the conventional plate heat exchanger, the rubber boots 5 are directly attached to the frame 1 as described above, so when it becomes necessary to replace the rubber boots 5, it is difficult to replace the rubber boots 5. However, it was impossible to replace the rubber boots 5 without disassembling the heat exchanger. However, once a plate type heat exchanger is disassembled, it takes a lot of effort and time to disassemble, tighten, remove scale attached to the heat transfer plate 3, inspect the gasket 2, etc. There was a problem in that the operation of the entire device including the heat exchanger had to be stopped for a long time.

The purpose of this invention is to provide a solution to the problems observed in conventional plate heat exchangers, particularly in the rubber boot mounting structure.

[Means to solve the problem]

As a means of solving the above problems, this invention arranges a required number of heat transfer plates in a stacked state with gaskets interposed between the fixed frame and the movable frame, and allows the heat exchange medium to flow in or out of both frames. In a plate heat exchanger, rubber boots are attached to the circulation holes of the frame, and piping connection flanges are fixed to the outer end surfaces of both frames in correspondence with the circulation holes. A boss is inserted into the hole with a ring made of a corrosion-resistant metal at the inner end, and a circulation hole for the inflow or outflow of the heat exchange medium is bored in the boss, and a rubber boot is attached to this hole. Furthermore, the present invention provides a plate heat exchanger in which a piping connection flange is fixed to a frame and the boss is mounted in a through hole.

[Effect]

If it becomes necessary to replace the rubber boot, the rubber boot in the flow hole can be replaced by removing the piping connection flange from the frame and removing the boss from the through hole, allowing you to replace the rubber boot without disassembling the heat exchanger. Exchange is possible.

〔Example〕

FIG. 1 shows an embodiment of this invention, and in the figure, 8 is one frame on the fixed side or moving side of the plate heat exchanger, and there is a frame between it and the other frame (not shown). , a required number of heat transfer plates 10 are stacked and arranged alternately with gaskets 9. Reference numeral 11 denotes a through hole drilled in the frame 8, which has a large diameter annular step 11a at the outer end (left end in the figure) and a small diameter annular step 11a at the inner end (right end in the figure). 11b. 12 is a boss with an L-shaped cross section attached to the through hole 11, which is inserted into the through hole 11 and attached to the flange 1 at one end.
2a is fitted into the annular stepped portion 11a, and the piping connection flange 13 is fixed to the outer end surface of the frame 8 with bolts 14 and nuts 15, thereby being attached to the through hole 11. A ring 16 is made of a corrosion-resistant metal such as stainless steel or titanium, and is fitted into the annular stepped portion 11b of the through hole 11. 1
Reference numeral 7 denotes a flow hole for the inflow or outflow of a heat exchange medium, which is bored in the boss 12, and has an annular stepped portion 17a at both ends.
17a. Reference numeral 18 denotes a rubber boot with a groove-shaped cross section, which is attached to the circulation hole 17 by inserting it into the circulation hole 17 and fitting the flanges 18a, 18a at both ends into the annular stepped portions 17a, 17a. There is.

Since the plate heat exchanger according to this invention has the above structure, when it becomes necessary to replace the rubber boot 18, after loosening the nut 15 and removing the piping connection flange 13, Through hole 1
Remove the boss 12 from 1 and replace the rubber boot 18 of the flow hole 17. Thereby, the rubber boot 18 can be replaced without disassembling the heat exchanger.

FIG. 2 shows another embodiment of this invention. In this embodiment, the boss 12 is formed to have a substantially rectangular cross section and is inserted entirely into the through hole 17, and the piping connection flange 13 is inserted into the through hole 17. Bolt 14 and nut 15
By fixing it to the outer end surface of the frame 8,
The rubber boot 18 is installed in the through hole 17, and replacement of the rubber boot 18 is carried out in the same manner as in the embodiment shown in FIG.

[Effect of idea]

As explained above, this invention allows the rubber boots to be replaced without disassembling the heat exchanger, so the rubber boots can be replaced easily and in a short time, and a device equipped with this plate heat exchanger can be used. It has very little effect on overall driving.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of a main part showing a mounting structure for a rubber boot applied to a plate heat exchanger according to this invention, and FIG. 2 is a longitudinal cross-sectional view of a main part showing another embodiment of this invention. FIG. 3 is a vertical cross-sectional view of a main part showing a rubber boot mounting structure applied to a conventional plate heat exchanger. 8...Frame, 12...Boss, 16...Ring, 18...Rubber boots.

Claims (1)

[Claims for Utility Model Registration] A required number of heat transfer plates are stacked and arranged between the fixed frame and the movable frame with gaskets interposed therebetween, and a flow channel for the inflow or outflow of the heat exchange medium between the two frames. In a plate heat exchanger in which rubber boots are attached to the holes and piping connection flanges are fixed to the outer end surfaces of both frames in correspondence with the flow holes, a through hole is bored in the frame, and a through hole is formed in the through hole. A ring made of corrosion-resistant metal is arranged at the inner end of the boss and a boss is inserted into the boss, and a circulation hole for the inflow or outflow of the heat exchange medium is bored in the boss, and a rubber boot is attached to this, and a rubber boot is attached to the boss. A plate heat exchanger characterized in that a piping connection flange is fixed to a frame and the boss is attached to a through hole.