JPH035666A - Formation method of straightening vane of straightening cylinder - Google Patents

Abstract

PURPOSE:To form a straightening vane without need of any specific machine tool by making the straightening vane of an ellipsoidal ring with the relation of specific size to divide said ellipsoidal ring into two so as to form as the straightening vane of a half ellipsoidal part. CONSTITUTION:In regard to the formation of a straightening vane, an ellipsoidal ring 28 is bisected along a parting line 29 without use of a specific machine tool to make two half divided ellipsoidal parts as one pitch so as to attach the straightening vanes 16(1), 16(1), 16(2), 16(2),...16(n), 16(n) of these ellipsoidal parts to a straightening cylinder outer vane 27 of a straightening cylinder 17 in order, for instance, with point adhesion and the like. In this case, the pitch of the lowest straightening vanes 16(1), 16(1) is maximum, formed to lessen at it goes upward and when an exhaust gas is in a high temperature state only because the exhaust gas comes out from a communicating passage, the area in contact with the straightening cylinder 17 is largest and gradually lessens as the exhaust gas climbs upward to lower its temperature.

Description

[Detailed Description of the Invention] [Summary] The present invention relates to a method for manufacturing a straightening tube, more specifically, a simple tube structure [Industrial Application Field] The present invention relates to a method for manufacturing a straightening tube, more specifically, to a simple tube structure in the flow direction. 2. A manufacturing method according to claim 1, in which the current plate becomes smaller in size along the length thereof, and a method for arranging such a current plate.

[Conventional technology]

The present applicant has developed a boiler body structure disclosed in Patent Application Publication No. 63-207949, and this boiler body, as shown in FIG. In the boiler body structure for heat exchange, there is a combustion tube 13 in which a burner 11 is attached in the axial direction of a combustion chamber 19, and a heat exchanger that is independent of this combustion tube 13 and exchanges heat with combustion gas from the combustion tube 13. It includes a communication passage 15 that communicates between the cylinder 14, the combustion cylinder 13, and the heat exchange cylinder 14,
Inside the heat exchange cylinder 14, a current plate 1 is arranged spirally as shown in FIG.
6 are arranged, a hanging tool 23, a lid 24, a handle 25 and a heat insulating material 26.
A removable rectifying tube 17 is attached thereto. 18 is an outer frame, 20 is a chimney connection port, 21 is a water supply port, and 22 is a hot water outlet.

When the boiler body is used, exhaust gas (combustion gas) rotates through the heat exchange tube 14 while being guided by the baffle plate 16 and rises. At this time, the centrifugal force acting on the exhaust gas
4 and exchange heat with the heat medium (boiler water) 12.

In the boiler body described above, the boiler body has a simple cylindrical structure to reduce manufacturing costs while maintaining a good heat exchange rate, and the rectifier tube is removable from the boiler body. There is a need for a method of manufacturing this rectifying tube at low cost.

As shown in FIG. 3, the rectifier plate 16 installed in the rectifier cylinder 17 is attached continuously in a spiral shape, but the rectifier plate 16 is manufactured using a special machine tool and is arranged in an oval shape. It is made by dividing a part into small pieces and joining them together.

[Problem to be solved by the invention]

This conventional method has the problem that the cost of the baffle tube itself equipped with the baffle plate is high, and the cost of the boiler body as a whole is high.

Therefore, the present invention is an inexpensive manufacturing method of a rectifying tube equipped with a baffle plate that does not require special machine tools. The purpose is to provide a method for setting

[Means to solve the problem]

The above-mentioned problem is to solve the above problem by adjusting the short axis D and the long axis to be smaller in size sequentially along the straightening tube for straightening the exhaust gas from the combustion chamber of the boiler body and exchanging heat with the heat medium through the heat exchange tube. Rectification characterized by making an elliptical ring with a width of a and dividing the elliptical ring into two in the major axis direction to form a rectifying plate of 1/2 elliptical pieces. This problem is solved by the method of forming the straightening plate of the cylinder.

[Effect]

That is, in the present invention, the current plate is formed into one of the elliptical rings shown in FIG.
Since it is formed by dividing it into 72 parts, it becomes possible to form it without relying on special machine tools as in the past.

〔Example〕

Hereinafter, the present invention will be specifically explained with reference to illustrated embodiments.

In the present invention, the structure of the boiler main body is the same as the example shown in FIG. 4, and the only difference is that the size of the boiler is gradually reduced along the straightening tube 17, and the straightening tube 17 is shown in FIG. A communication channel 15 connects to the combustion chamber 19 of the boiler.

In the present invention, the current plate is formed by dividing the elliptical ring 28 into 172 parts (dividing into three equal parts) as shown in FIG. 2 without using a special machine tool.

Referring to the same figure, in the present invention, the short axis D, the long axis D''+
CP (n) /2)'', an elliptical ring 28 with a width a is made.

At this time, the length d of the dividing line 29 that divides the elliptical ring into three equal parts along the major axis is, however, P (n) is the n-th current plate 16 (n) from the bottom in FIG. ), 16 (n).

Such an elliptical ring 28 is divided into three equal parts along the dividing line 29, and two half-divided oval rectifier plates 16 (n) correspond to one pitch. 16(1), 16(
1), 16 (2), 16 (2)...16(n)
, 16(n) are sequentially attached to the rectifying cylinder outer plate 27 of the rectifying cylinder 17 as shown in FIG. 1 by, for example, boiling adhesive.

Note that the pitch P described above is P(1)>P(2)...
P(n), the lowest current plate 16(1), 16
(1) is formed so that the pitch is the largest and becomes smaller as it goes upwards, and when the exhaust gas has just come out of the communication path 15 and is at the highest temperature, the area in contact with the rectifier cylinder 17 is the largest. , this area gradually becomes smaller as the exhaust gas rises upward and its temperature decreases, resulting in efficient heat exchange.

When installing the current plates as described above, the alignment of the current plates will not be on the same plane, but will intersect, but in terms of performance, the example shown in Figure 3, that is, a single piece without intersecting. It was confirmed that there is almost no difference from the case where the connection is made like this.

The manufacturing cost of the straightening tube equipped with the straightening plate according to the present invention shown in FIG. 1 was 60% of the manufacturing cost of the straightening tube shown in FIG. 3.

〔Effect of the invention〕

As described above, according to the present invention, manufacturing and installation according to claim 1, which gradually decrease in size along the flow direction, do not depend on special machine tools, so not only are costs reduced, but
Since the arrangement pitch is gradually reduced in accordance with the flow direction of the exhaust gas, there is an effect of increasing the heat exchange rate of the heat medium.

[Brief explanation of drawings]

Fig. 1 is a front view of an embodiment of the present invention, Fig. 2 is a plan view illustrating the manufacturing method of the rectifying plate of the present invention, Fig. 3 is a front view of a conventional example, and Fig. 4 is a boiler developed by the applicant. 5 is a partial sectional view in the flow direction of FIG. 4. In the figure, 11 is a burner, 12 is a heat medium (boiler water), 13 is a combustion tube, 14 is a heat exchange tube, 15 is a communication path, 16.16a, orb, 16 (1), 16 (2)...
・16(n) is a rectifier plate, 17 is a rectifier cylinder, 18 is an outer frame, 19 is a combustion chamber, 20 is a chimney connection port, 21 is a water supply port, 22 is a hot water outlet, 23 is a hanging tool, 24 is a lid, 25 26 is a heat insulating material, 27 is a straightening tube outer plate, 28 is an elliptical ring, and 29 is a dividing line.

Claims (2)

[Claims] (1) A rectifier plate (16) attached to a rectifier cylinder (17) for rectifying the exhaust gas from the combustion chamber (19) of the boiler body and exchanging heat with the heat medium (12) via the heat exchange cylinder (14).
(1), 16(2)...16(n)) into an elliptical ring (2
8), and divide the elliptical ring (28) into two in the major axis direction to create 1/2 elliptical rectifier plates (16(1), 16(2)...
16(n)). (2) The method according to claim 1, wherein the pitch P(n) becomes smaller sequentially along the flow direction of the exhaust gas.