JP4288807B2 - Water pressure test equipment for heat transfer tube panels with pipes - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a water pressure test apparatus for a heat transfer tube panel with a pipe.
[0002]
[Prior art]
In general, a heat transfer tube panel with a pipe used in a boiler has a configuration in which a large number of heat transfer tubes 2 are connected at a predetermined interval in the longitudinal direction of the pipe 1 as shown in FIG. When performing the water pressure test on the heat transfer tube panel with the pipe, the nozzle 3 protruding from the pipe 1 is closed with the cover plate 4 in a state where the pipe 1 is arranged vertically, and the desired pipe Water is applied from the pedestal 3 to apply water pressure to the pipe holder 1 and the heat transfer pipe 2.
[0003]
As shown in FIGS. 3 and 4, the cover plate 4 maintains water tightness at the base end portion of a shaft body 7 in which a latching piece 5 is pivotally attached to a tip end thereof with a pin 6 as a center. However, it is fitted so as to be slidable in the axial direction, and when the water pressure test of the heat transfer tube panel with a pipe is performed, the hooking piece 5 is tilted along the longitudinal direction of the shaft body 7. Then, after inserting into the nozzle 3 and hooking the latching piece 5 on the connection portion of the nozzle 3 to the nozzle 1, the cover plate 4 covers the open end of the nozzle 3, By tightening the nut 8 screwed to the base end portion, the cover plate 4 is fixed to be crimped to the opening end of the nozzle pedestal 3, the opening end of the nozzle pedestal 3 is closed, and water leaks to the outside. Is supposed to prevent.
[0004]
Further, the shaft body 7 of the cover plate 4 attached to the nozzle 3 to which water is supplied is extended along the shaft center from the proximal end to the distal end side as shown in FIG. A flow passage 9 opening at a required location is formed, and a water supply pipe 11 extending from the water pressure pump 10 is connected to the flow passage 9. When performing a water pressure test on a heat transfer tube panel with a pipe, As with the plate 4, water is supplied into the nozzle 3 from the hydraulic pump 10 through the water supply pipe 11 and the flow passage 9 of the shaft body 7 with the open end of the nozzle 3 closed. .
[0005]
[Problems to be solved by the invention]
As described above, the water pressure test of the heat transfer tube panel with the pipe holder is performed in a state where the pipe holder 1 is arranged vertically, mainly due to a space problem, that is, when the pipe holder 1 is arranged horizontally. This is because a large space is required, but if the pipe holder 1 is arranged vertically, it is possible to perform a water pressure test on a large number of heat transfer tube panels with a pipe at a narrow place.
[0006]
However, when the water pressure test is performed on the heat transfer tube panel with the header in the state where the header 1 is arranged vertically, if water is introduced from the nozzle 3, the air inside does not escape and the air is introduced into the upper portion of the header 1. There was a drawback that a pocket was formed and proper pressure could not be obtained.
[0007]
For this reason, in the prior art, a dedicated nozzle (not shown) is provided at the upper end of the nozzle 1 so that air can escape when the water is filled. Providing a dedicated nozzle at the upper end is time consuming and leads to increased costs, which is undesirable and an improvement has been desired.
[0008]
In view of such circumstances, the present invention can surely evacuate the internal air during the water pressure test without providing a dedicated nozzle or the like at the upper end of the nozzle, and smoothly perform the water pressure test at an appropriate pressure. It is an object of the present invention to provide a water pressure test apparatus for heat transfer tube panels with pipes that can be performed.
[0009]
[Means for Solving the Problems]
The present invention provides a nozzle that protrudes from a nozzle in a state in which the nozzle of a heat transfer tube panel with a header formed by connecting a number of heat transfer tubes with a predetermined interval in the longitudinal direction of the nozzle is arranged vertically. A water pressure test apparatus for a heat transfer tube panel with a header constructed to close with a cover plate and to fill water from a desired nozzle and to apply water pressure to the tube header and the heat transfer tube,
A float member having an air vent hole opened on the surface of the water in a state of floating in the water is inserted into the end of the air vent hose by inserting the air vent hose into the pipe through the lid plate. The present invention relates to a water pressure test apparatus for a heat transfer tube panel with a pipe, characterized in that the air vent hole of the float member is connected to be released to the atmosphere through an air vent hose.
[0010]
In the water pressure test apparatus for the heat transfer tube panel with a pipe, an air vent pipe provided with an open / close valve can be connected to the proximal end of the air vent hose.
[0011]
According to the above means, the following operation can be obtained.
[0012]
When performing a water pressure test on a heat transfer tube panel with a nozzle, close the nozzle protruding from the nozzle with a cover plate while placing the nozzle vertically, and add water from the desired nozzle Since the float member floats in the water so that the air vent hole opens on the water surface, the air remaining in the sealed space at the top of the pipe is gradually increased as the water surface rises. The air is exhausted from the air vent hole of the float member to the atmosphere via the air vent hose, and the air can be released when the water is filled without providing a dedicated nozzle at the upper end of the pipe holder.
[0013]
In the water pressure test apparatus for a heat transfer tube panel with a pipe, when an air vent pipe provided with an open / close valve is connected to the base end of the air vent hose, When water is further supplied after the remaining air is completely discharged, the water is discharged from the air vent hole of the float member through the air vent hose air vent pipe and the open on-off valve. Is closed, the inside of the pipe holder and the heat transfer tube are filled with water and no air is present, so that an appropriate water pressure can be applied.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described together with illustrated examples.
[0015]
1 and 2 show an example of an embodiment of the present invention. In the figure, the same reference numerals as those in FIGS. 3 and 4 denote the same components, and the basic configuration is shown in FIGS. 4 is the same as the conventional one shown in FIG. 4, but the feature of this illustrated example is that, as shown in FIGS. 1 and 2, the cover plate 4 is penetrated and an air bleeding hose 12 such as a silicon hose is piped. A float member 14 made of a resin or the like having an air vent hole 13 opened on the water surface in a state of floating in water at the tip of the air vent hose 12 is inserted into the float 1. The air vent hole 13 is connected through the air vent hose 12 so as to be opened to the atmosphere.
[0016]
An air vent pipe 16 made of a steel pipe or the like provided with an on-off valve 15 is connected to the base end of the air vent hose 12 via a connector 17.
[0017]
Next, the operation of the illustrated example will be described.
[0018]
When performing the water pressure test of the heat transfer tube panel with the nozzle, the nozzle 3 protruding from the nozzle 1 is closed with the cover plate 4 in a state where the nozzle 1 is arranged vertically, and from the desired nozzle 3 When the water is filled, the float member 14 floats in the water so that the air vent hole 13 opens on the water surface. As the water surface gradually rises, the upper portion of the pipe 1 is sealed. The air remaining in the space is exhausted from the air vent hole 13 of the float member 14 to the atmosphere through the air vent hose 12, the connector 17, the air vent pipe 16, and the open on-off valve 15. Even if there is no dedicated nozzle, the air can escape when water is filled.
[0019]
After the air remaining in the sealed space at the top of the nozzle 1 is completely discharged, when water is further supplied, the air is removed from the air vent hole 13 of the float member 14 through the air vent hose 12, the connector 17, and the air vent. When the on-off valve 15 is closed in this state, the pipe 1 and the heat transfer pipe 2 are filled with water and no air is present. Therefore, it is possible to apply an appropriate water pressure.
[0020]
Thus, the internal air can be surely removed during the water pressure test without providing a dedicated nozzle or the like at the upper end of the pipe holder 1, and the water pressure test can be performed smoothly at an appropriate pressure.
[0021]
It should be noted that the water pressure test apparatus for a heat transfer tube panel with pipe according to the present invention is not limited to the above illustrated example, and it is needless to say that various changes can be made without departing from the gist of the present invention.
[0022]
【The invention's effect】
As described above, according to the water pressure test apparatus for a heat transfer tube panel with a pipe according to the present invention, the internal air is surely removed during the water pressure test without providing a dedicated nozzle or the like at the upper end of the pipe. It is possible to achieve an excellent effect that the water pressure test can be smoothly performed at an appropriate pressure.
[Brief description of the drawings]
FIG. 1 is a side sectional view of an example of an embodiment for carrying out the present invention.
FIG. 2 is an enlarged view of a float member in an example of an embodiment of the present invention.
FIG. 3 is a side sectional view of a conventional example.
4 is a view taken along arrow IV-IV in FIG. 3;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Tube 2 Heat transfer tube 3 Tubular base 4 Cover plate 12 Hose for air vent 13 Air vent hole 14 Float member 15 On-off valve 16 Air vent pipe

Claims (2)

In the state where the pipe header of the heat transfer tube panel with a pipe formed by connecting a number of heat transfer pipes with a required interval in the longitudinal direction of the pipe is arranged vertically, the nozzle base protruding from the pipe is closed with a lid plate In addition, a water pressure test apparatus for a heat transfer tube panel with a header constructed to fill water from a desired nozzle and apply water pressure to the tube and the heat transfer tube,
A float member having an air vent hole opened on the surface of the water in a state of floating in the water is inserted into the end of the air vent hose by inserting the air vent hose into the pipe through the lid plate. A water pressure test device for a heat transfer tube panel with a pipe, wherein the air vent hole of the float member is connected to be released to the atmosphere through an air vent hose. The water pressure test apparatus for a heat transfer tube panel with a pipe according to claim 1, wherein an air vent pipe provided with an on-off valve is connected to a base end of the air vent hose.

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