JPH02255271A - Structure for hanging plate of shell and plate heat exchanger - Google Patents

Abstract

PURPOSE:To improve the maintenance characteristic of the plate and to intensify the pressure resistance thereof by mating two sheets of press-formed plate materials, welding the circumference, attaching a hook to the plate material, and hanging the plate to a guide bar via a hanger engaged therewith. CONSTITUTION:The structure for hanging the plate is formed by fixing the hook F1 of about the size and shape at and with which the working at the time of a circumferential welding is not hindered before two sheets of the plate materials are welded. Two sheets of the plate materials fixed with the hook F1 are then superposed on each other and are circumferentially welded. The plate P with the hook obtd. in such a manner is hung via the hanger H1 to the guide bar G of the heat exchanger. Although the hook attaching part of the plate P needs be stepped as compared to the other heat transmit part, the adequate spacing of the plates P is maintained and reinforced and the deformation thereof is eventually prevented by forming the hanger H1 so as to have a step and pressing the same to the adjacent hanger H1 or the plate P.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a plate suspension structure in a shell-and-plate heat exchanger using two circumferentially welded plates.

[Conventional technology]

The plate heat exchanger is a well-known device that exchanges heat between two fluids flowing through rib plates, and as shown in Figure 5, a plurality of plates (p□) are connected to a pair of frames (2, 3). ) is maintained in a stratified state between the plates, and the two types of fluids are made to alternately flow through the passages formed between the plates.

Each plate (pt) has notches (4, 5) at the top and bottom as shown in FIG. 6, and a hanger (6) is attached around the top notch (4). Then, connect the plate (P) to the heat exchanger guide bar (
7), and the notches (4, 5) engage with the corresponding guide bars (7, 8) to determine the position.

According to such a suspension structure, for example, when cleaning the plate heat transfer surface, the plate (2, 3) is placed between the frames (2, 3).
Simply loosen the stay bolts (not shown) that tighten the stay bolts (pt) and move the moving frame (2) to the end of the guide bar, then move the plates (pl) along the guide bar (7) one by one. Can be spaced apart.

Therefore, an advantage has been recognized that a desired work can be performed while the plate (pl) is suspended from the guide bar (7).

[Problem to be solved by the invention]

However, the shell-and-plate heat exchanger that is the subject of this invention has some problems due to problems such as the shape and processing of the plates.
It is not designed to suspend the plate, i.e., as shown in Figures 7 and 8.
) are protrusions (11, 12) provided on the inner wall surface of the shell (10).
, 13).

PLAY) (pz) is a two-piece circumferential welding type,
A fluid passage (c) is formed between the press-formed plates by overlapping them and welding them around the periphery. Therefore, if a hole is provided for attaching a hanger like the above-mentioned plate (pt) made of a single plate without circumferential welding, the internal fluid will leak, and if it is attached by welding etc. before circumferential welding, , the hanger gets in the way during the subsequent circumferential welding, making processing difficult. Even if you attempt to cut and weld the circumference first and then attach it afterwards, it will not be possible to perform effective processing that can ensure sufficient attachment strength.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide the advantages of a hanging type plate by making it possible to suspend the two plates of the circumferentially welded type as described above.

[Means to solve the problem]

In this invention, two press-formed plates are joined together and welded around the periphery, and a hook is provided protruding from the plate, and a hanger is engaged with the hook so that the hook is suspended from a guide bar.

The hanger includes at least a portion with a hole through which the guide bar passes and a portion with a hole that engages with the hook.

The hanger may be a single plate or may consist of a pair of legs joined together at one end.

The hanger may be formed into a stepped shape and include a surface portion that contacts one plate and a surface portion that contacts the other plate or hanger.

Regardless of its name, the hook only needs to engage with a hole in the hanger, and may be a straight rod-shaped pin. A hook shape with a protrusion at the tip will ensure more reliable engagement.

The hooks protrude from one or both sides of the plate.

The hooks can also be of such length that the hooks abut each other between adjacent plates.

[Effect]

In the plate hanging structure of the present invention, before welding two plate materials, a hook of a size and shape that does not interfere with circumferential welding is fixed to a suitable position on the plate material. As for the fixing method, welding (for example, stud welding, spot welding, etc.) is preferable because it can provide the specified strength considering the weight of the plate to be suspended, and there is no risk of fluid leakage. Next, the two plates with the hooks fixed on them are stacked on top of each other and the periphery is welded. The hooked plate obtained in this way is hung on the guide bar of the heat exchanger via a separately prepared hanger.

Because it is necessary to attach the hook, the hook attachment portion of the plate must be stepped compared to the heat transfer surface portion, which reduces the pressure resistance of the plate at that portion. However, by forming the hanger in steps and applying it to adjacent hangers or plates, the plates can be reinforced and prevented from deforming. Further, the hanger is interposed between adjacent plates to maintain an appropriate distance between them, thereby preventing sealing failure due to deformation of the plates or the like. In this way, the hanger not only engages with the hook to suspend the plate (but also actively positions and reinforces adjacent plates).

〔Example〕

First, to explain the embodiment shown in FIG.
One fluid passage (C) is formed inside. Each plate material is press-formed into a suitable cross-sectional shape such as a corrugated shape, and the corrugated protrusions, for example, abut each other between adjacent plates (P).

Although not shown in the drawing, there is a passage (C) between adjacent plates.
There is an opening (see FIG. 8) for communicating the two fluids, and the adjacent plates are brought into close contact with a gasket placed around this opening to form a passage between them for the other fluid.

This embodiment has hooks (F) on only one side of the plate (P).
1), and one plate (P) is suspended from one hanger (Hl). Hanger (Hl)
) is the part (22) having a hole through which the guide bar (G) passes.
In addition to this, it includes a surface portion (24) having a hole that engages with the hook (Fl), and a surface portion (26) at a different level from this,
Among these surface portions, the former (24) contacts the plate (P), and the latter (26) contacts the adjacent plate (P), respectively. This provides the effect of preventing the plate (P) from deforming due to fluid pressure within the passageway (C).

Next, in the embodiment shown in FIG. 2, hooks (F2) are provided on both sides of the plate (P), and hangers (F2) are engaged with each hook.

In this embodiment, the hooks (F2) are straight rod-shaped, and the hooks (F2) of adjacent plates (P) abut each other at their end faces. Therefore, hook (F2) and hanger (
Both of F2) maintain the plate spacing, reinforce the plates, and increase the compressive strength.

In FIG. 2, the hangers (F2) that are respectively engaged with the pair of hooks (F2) are shown as being separate from each other, but they can also be integrated. For example, the hanger (Ha) shown in Figure 3 has a pair of legs (28) joined at one end, each having a hole at the other end for engaging a hook (F3). This hanger (F3) may be made by welding two legs (28) at one end, or by bending a single plate as shown. In any case, handling is easier than using two separate pieces.

In any of the cases described above, the hangers (H1 to Ha) are removably attached to the plate (P), so there is no problem in welding the circumference of the plate (P).

That is, when manufacturing a plate, a hook is welded to a press-formed plate, and then two plates thus obtained are joined together and the periphery is welded. The cross-sectional shape around the plate is subject to restrictions in order to satisfy various design conditions, but since a hanger is interposed between adjacent plates, it is possible to strengthen the plate by appropriately setting the shape and dimensions of the hanger. can be achieved. In particular, the hanger has a simpler shape and is smaller than the plate, so it can be easily obtained with high precision. In other words, the hanger is not only used to hang plates, but also to maintain the distance between plates.
It is used as something that also has the function of reinforcing the plate.

The embodiment shown in FIG. 4 is a hanger (H
4) is used.

In this case, when the legs (34) of the hanger (H4) are spread out and placed on the plate (P), and the holes (36) of the legs (34) are respectively engaged with the hooks (F4), the pair of legs (34)
The hanger (H4) elastically clamps the plate (P), so there is no risk of it coming off accidentally.
A separate elastic material such as a spring plate or spring may also be used.

〔Effect of the invention〕

Two circumferentially welded plates are welded around the periphery to form a sealed passage, so they are highly reliable in preventing fluid leakage, but because the outer periphery is welded, it is difficult to adopt a hanging structure. As a result, ease of handling during disassembly was sacrificed. However, according to this invention, it is possible to suspend two circumferentially welded plates, without sacrificing the original advantage of high reliability (and also having the advantages of the suspended type). became.

In other words, since the hook is simply fixed to the plate, there is no problem with circumferential welding, and the plate is suspended via a hanger that engages with the hook, making it easy to move the plate within the heat exchanger. Become. Therefore, when cleaning or the like, it is not necessary to remove the entire plate from the heat exchanger and place it outside the heat exchanger as in the conventional case. This is because by simply moving the movable frame to the end, it is sufficient to move the plates one by one or by a desired number of plates out of the shell along the guide bar. Not only is it no longer necessary to secure a space for placing plates for cleaning, etc., but also the labor and effort required by workers for moving plates, etc. is greatly reduced.

In addition to improving maintainability as described above, the present invention also improves the shape of the hanger and/or hook.
By appropriately setting the dimensions, it is possible to maintain the spacing between the plates and increase pressure resistance.

[Brief explanation of drawings]

Figures 1 to 4 are cross-sectional views of the upper plate and hanger showing an embodiment of the present invention, Figure 5 is a front view of a conventional plate heat exchanger, and Figure 6 is a front view of a conventional hanging plate. Figure 7 is a cross-sectional view of a conventional two-piece circumferentially welded plate. #! FIG. 8 is a sectional view of a conventional shell-and-plate heat exchanger. P, plate H! ~H4: Hanger F1~F4: Hook G Guide bar W: Circumferential welding Patent Applicant: Hikyoku Seisakusho Co., Ltd. [Figure 8, sry1

Claims (1)

[Claims] (1) In a method in which two press-formed plates are joined together and welded around the circumference, a hook is provided protruding from the plate, and a hanger is engaged with the hook to be hung from a guide bar. Plate suspension structure of shell and plate heat exchanger.