JP2001194264A - Hydraulic pressure testing device for heat transmission tube panel with header - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hydraulic pressure teasing device for a heat-transmission tube panel with a header capable of reliably removing air from the inside during hydraulic pressure tests and smoothly performing the hydraulic pressure tests at an appropriate pressure without providing a dedicated nozzle stub, etc., for the upper end of the header. SOLUTION: A hose 12 for releasing air is passed through a cover plate 4 and inserted into the header 1. An air release hole 13 open above a water surface with a float member 14 in a state floated on the water is bored in the front member, and the float member 14 is connected to the tip of the hose 12 for releasing air in such a way that the air release hole 13 of the float member 14 is open to the atmosphere via the hole 12 for releasing air.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water pressure test apparatus for a heat transfer tube panel with pipes.

[0002]

2. Description of the Related Art Generally, as shown in FIG. 3, a heat transfer tube panel with pipes used in a boiler has a structure in which a number of heat transfer tubes 2 are connected at a required interval in the longitudinal direction of pipes 1. However, when a water pressure test is performed on the heat transfer tube panel with the pipe, the nozzle 1 protruding from the pipe 1 is closed with the cover plate 4 in a state where the pipe 1 is arranged vertically. At the same time, water is filled from a desired nozzle 3 to apply a water pressure to the pipe 1 and the heat transfer pipe 2.

[0003] As shown in FIGS. 3 and 4, the lid plate 4 is provided with a watertight property at the base end of a shaft 7, on the tip of which a locking piece 5 is pivotally attached so as to be tiltable about a pin 6. The holding piece 5 is tilted along the longitudinal direction of the shaft body 7 when a water pressure test is performed on the heat transfer tube panel with pipes. In the state where it was made
After the hook piece 5 is hooked on the connecting portion of the nozzle 3 with respect to the pipe 1, the cover plate 4 covers the open end of the nozzle 3, and is screwed into the base end of the shaft 7. By tightening the attached nut 8, the cover plate 4 is fixed so as to be pressed against the open end of the nozzle 3 so as to close the open end of the nozzle 3 and prevent water from leaking to the outside. Has become.

As shown in FIG. 3, the shaft 7 of the cover plate 4 attached to the nozzle 3 to which water is supplied extends along the axis from the base end to the distal end, and When a water supply pipe 11 extending from a water pressure pump 10 is connected to the flow path 9 to open a required portion on the outer peripheral surface of the Other lid plate 4
Similarly, water is supplied from the hydraulic pump 10 into the nozzle 3 through the water supply pipe 11 and the flow passage 9 of the shaft 7 in a state where the opening end of the nozzle 3 is closed.

[0005]

As described above, the reason why the water pressure test is performed on the heat transfer tube panel provided with the pipes 1 in a state where the pipes 1 are arranged vertically is mainly a space problem, that is, the pipes. If the pipe 1 is placed horizontally, a large space is required, but if the pipe 1 is placed vertically, it is possible to conduct a water pressure test on a large number of pipes with pipes at a time even in a narrow place. It is because it becomes.

[0006] However, when a water pressure test is performed on the heat transfer tube panel with the pipe 1 in a state where the pipe 1 is vertically arranged, when water is poured from the nozzle 3, the air inside the pipe 1 does not escape and the pipe 1 does not leak. There is a drawback that an air pocket is formed in the upper portion and an appropriate pressure cannot be obtained.

For this reason, conventionally, a dedicated nozzle (not shown) is provided at the upper end of the pipe holder 1 so that air can escape when the water is filled. Providing a dedicated nozzle at the upper end of the first place is troublesome and leads to an increase in cost, which is not desirable, and an improvement has been desired.

The present invention has been made in view of the above circumstances, and it is possible to reliably release air inside a hydraulic pressure test without providing a dedicated nozzle at the upper end near the pipe, and to perform the hydraulic pressure test at an appropriate pressure. It is an object of the present invention to provide a water pressure test apparatus for a heat transfer tube panel with pipes, which can smoothly perform the test.

[0009]

SUMMARY OF THE INVENTION The present invention relates to a pipe-type heat transfer tube panel having a plurality of heat transfer tubes connected to each other at a predetermined interval in the longitudinal direction of the pipe. A water pressure test apparatus for a heat transfer tube panel with a pipe which is configured to close a nozzle protruded from the nozzle with a cover plate, fill the pipe with water from a desired nozzle, and apply water pressure to the nozzle and the heat transfer tube. Then, an air bleeding hose is inserted into the pipe through the cover plate, and at the tip of the air bleeding hose, a float member having an air bleeding hole opened on the water surface in a state of floating on water is provided. The present invention relates to a water pressure test device for a heat transfer tube panel with pipes, wherein the air vent holes of the float member are connected to be released to the atmosphere via an air vent hose.

[0010] In the water pressure test apparatus for a pipe with heat transfer tube panel, an air vent pipe provided with an on-off valve can be connected to the base end of the air vent hose.

According to the above means, the following effects can be obtained.

When performing a water pressure test on a heat transfer tube panel with a pipe, a pipe stub protruding from the pipe sluice is closed with a cover plate and water is discharged from a desired nozzle stub in a state where the pipe skewer is arranged vertically. When stretched, the float member floats on the water so that the air vent hole is opened on the water surface, so that as the water surface gradually rises, the float member remains in the sealed space near the upper part of the pipe. The air is discharged to the atmosphere from the air vent hole of the float member through the air vent hose, so that the air can be released at the time of water filling without providing a dedicated nozzle at the upper end near the pipe.

In the above water pressure test apparatus for a heat transfer tube panel with pipes, when an air bleeding pipe provided with an on-off valve is connected to the base end of the air bleeding hose, the upper part of the pipe is sealed. After the air remaining in the space is completely discharged, when water is further supplied, the water is discharged from the air release hole of the float member through the air release hose and the open / close valve and the open / close valve. When the on-off valve is closed by the above, since the inside of the pipe and the inside of the heat transfer pipe are filled with water and there is no air at all, it is possible to apply an appropriate water pressure.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 show an embodiment of the present invention. In the drawings, the portions denoted by the same reference numerals as those in FIGS. 3 and 4 represent the same components. 3 and FIG. 4, but the feature of this example is that, as shown in FIG. 1 and FIG. 12 is inserted into the pipe 1 and a float member 14 made of resin or the like having an air bleeding hole 13 formed at the tip of the air bleeding hose 12 and opening on the surface of the water while floating on the water is attached to the float. Member 1
4 is that the air vent hole 13 is connected to the atmosphere through the air vent hose 12.

An air bleeding pipe 16 made of a steel pipe or the like provided with an on-off valve 15 is connected to a base end of the air bleeding hose 12 via a connector 17.

Next, the operation of the above illustrated example will be described.

When conducting a water pressure test on a heat transfer tube panel with a pipe, a pipe stub 3 protruding from the pipe 1 is closed with a cover plate 4 while a pipe 1 is arranged vertically, and a desired pipe is provided. When water is applied from the base 3, the float member 14 is moved to the air vent hole 1
3 floats on the water so as to open above the water surface. As the water surface gradually rises, the air remaining in the sealed space above the pipe 1 is removed from the air vent hole of the float member 14. 13, the air is discharged to the atmosphere through the air bleeding hose 12, the connector 17, the air bleeding pipe 16, and the open / close valve 15. Comes out.

After the air remaining in the closed space above the pipe 1 is completely exhausted, water is further supplied. When the water is supplied, the water is discharged from the air vent hole 13 of the float member 14 to the air vent hose 12 and the connector 17. Is discharged through the open / close valve 16 and the open / close valve 15 which is opened. If the open / close valve 15 is closed in this state, the pipe 1 and the inside of the heat transfer tube 2 are filled with water and no air is present. Since it is in a state, it is possible to apply an appropriate water pressure.

In this way, without providing a dedicated nozzle at the upper end of the pipe holder 1, the internal air can be reliably removed at the time of the hydraulic pressure test, and the hydraulic pressure test can be smoothly performed at an appropriate pressure.

The apparatus for testing the pressure of a heat transfer tube panel with pipes according to the present invention is not limited to the above-described example, and various changes can be made without departing from the scope of the present invention. It is.

[0022]

As described above, according to the apparatus for testing the pressure of a heat transfer tube panel with a pipe according to the present invention, the air inside the pipe during the water pressure test can be provided without providing a dedicated nozzle at the upper end of the pipe. Can be reliably removed, and an excellent effect that a water pressure test can be smoothly performed at an appropriate pressure can be achieved.

[Brief description of the drawings]

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

FIG. 2 is an enlarged view of a float member according to an example of an embodiment of the present invention.

FIG. 3 is a side sectional view of a conventional example.

FIG. 4 is a view taken in the direction of arrows IV-IV in FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 1 pipe 2 heat transfer pipe 3 nozzle 4 lid plate 12 air release hose 13 air release hole 14 float member 15 on-off valve 16 air release pipe

Claims (2)

[Claims] 1. A tube stand protruding from a pipe in a state where the pipes of a heat transfer pipe panel with pipes connected to a plurality of heat transfer pipes are connected vertically at a required interval in the longitudinal direction of the pipes. A water pressure test device for a heat transfer pipe panel with a pipe which is configured to close the pipe with a lid plate, fill the pipe with water from a desired nozzle, and apply water pressure to the pipe and the heat transfer pipe. An air bleeding hose is inserted into the pipe, and at the tip of the air bleeding hose, a float member having an air bleeding hole opened on the water surface while floating on water is provided. A water pressure test apparatus for a heat transfer tube panel connected to a pipe, wherein the pressure test apparatus is connected to be opened to the atmosphere via an air release hose. 2. The water pressure test apparatus for a tube with heat transfer tubes according to claim 1, wherein an air bleeding pipe provided with an on-off valve is connected to a base end of the air bleeding hose.