JP2004132802A - Pressure test apparatus of hose terminal part for fire fighting - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate the mounting of a connecting metal fixture of a hose terminal to a medium metal fixture. <P>SOLUTION: The pressure test apparatus of a hose terminal part for fire fighting comprises a hose connecting pipe having the medium metal fixture connectable to the connecting metal fixture of the hose terminal in such a way as to be freely attached and detached; a water tank and a booster pump for feeding water into a hose via the hose connecting pipe and discharging the water; and a clamp means for pressing and blocking a midpoint in the hose close to the connecting metal fixture. A hose guide having a prescribed length to be guided into the hose is protruded from the medium metal in such a way as to be directed in the direction of connection of the hose. When a pressure test of the hose for fire fighting is performed, it is possible to mount the hose terminal part to the medium metal fixture along the hose guide. Therefore, the work of attaching and detaching the medium metal fixture to and from a mounting metal fixture of the hose. In addition, it is possible to reduce both expansion volume inside the hose and the quantity of water to be used and to shorten a test time. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a pressure test apparatus for detecting water leakage due to cracks or damage to a fire hose and verifying whether or not there is a proper pressure resistance.
[0002]
[Prior art]
The inner surface of the hose near the end of the fire hose has a brittle progression due to oxidation due to the influence of the outside air coming in and out from the opening of the fitting, and is severely deteriorated by repeated extreme bending due to the weight of the fitting. In an emergency, high-pressure water may leak. As a means for inspecting the pressure resistance of the portion near the fitting of the hose, a "hoses leak detecting device" disclosed in Japanese Utility Model Registration No. 3011079 has been widely used in terms of convenience and reliability. Have been.
[0003]
This is provided with a hose connection pipe having a connection fitting to which a joint fitting of the hose is detachably connected, and provided in communication with the hose connection pipe, and filled and drained with respect to the hose via the connection fitting. A possible water filling device, a pressurizing device provided in communication with the hose connection pipe and pressurizing the hose via the connection fitting, and holding the hose body halfway near the joint fitting in a closed state. And a clamping device that performs the operation.
[0004]
When a hose leak is detected using this device, the hose body is clamped and closed in the middle of the hose body, and water is supplied to the hose by a water filling and draining device provided in communication with the hose connection pipe. The hose is supplied, and further, the hose is pressurized by a pressurizing device provided in communication with the hose connection pipe, and a leak of the hose is detected by detecting a change in the pressure.
[0005]
[Problems to be solved by the invention]
However, when this device is filled with water in the hose and pressurized by the pressurizing device, if air remains in the hose, there is a danger of rupture due to deterioration of the hose, etc. As the temperature gradually cools, the water filling pressure fluctuates, which is likely to cause misidentification as a hose leak. In addition, when the inner diameter of the hose is large, the amount of water filling and drainage increases, and the pressurizing operation by the pressurizing device is not easy.
[0006]
[Means for Solving the Problems]
Accordingly, the present invention provides a pressure test for a hose that completely removes air remaining in the hose, reduces the amount of water supplied to the test area of the hose, and facilitates the pressurizing operation. A hose connecting pipe having a connecting metal fitting capable of detachably connecting a connecting fitting of a hose terminal to and from a connecting fitting of a connecting pipe is easily provided. A water tank and a pressurizing pump for pumping and discharging water into the hose through the hose connection pipe; and a clamp means for pressing and closing a portion of the hose close to the connection fitting. The present invention relates to an apparatus for testing the pressure resistance of a fire hose end portion, wherein a hose guide of a fixed length to be inserted protrudes in a connecting direction of the hose.
[0007]
Further, according to the invention of claim 2, an air vent hole is formed in the hose guide projecting from the above-mentioned intermediate metal fitting from the mounting base to the projecting distal end, and the intermediate metal fitting for communicating the air in the hose test section from the hose guide distal end to the hose guide. The fire-extinguishing hose end pressure resistance testing device according to claim 1, wherein the pressure-testing device is capable of being discharged to the outside of the hose connection pipe via a valve.
[0008]
Further, the invention according to claim 3 is characterized in that the projecting height of the tip end of the hose guide is provided at a position higher than the horizontal height of the clamp means for compressing and closing the middle of the hose near the fitting. The present invention relates to an apparatus for testing pressure resistance of a fire hose end portion according to claim 1 or 2.
[0009]
In the above-described configuration, the connection fitting of the hose terminal is covered with the hose guide, and guided toward the base of the hose guide, the connection fitting is mounted on the intermediate fitting, and the middle of the hose closer to the connection fitting is clamped by the clamping means. Set the test area of the hose with compression occlusion. In this state, the air release valve is opened, and the water in the water tank is sent into the test area in the hose via the hose connection pipe and the intermediate fitting by operating the pressure pump. Along with this, residual air in the test area is pressed from the distal end of the hose guide toward the base, and is discharged outward from the air release valve via the intermediate fitting.
[0010]
When the air in the test area gradually decreases and water starts to flow from the air release valve, close the air release valve and further operate the pressure pump to pump a sufficient amount of water into the test area. . When the preset test pressure is reached, the operation of the pressurizing pump is stopped, and the pressure is monitored for a certain period of time (for example, 5 minutes). to decide. At this time, the presence or absence and location of water leakage can be visually confirmed.
[0011]
After the test is completed, each valve is opened to drain the water in the test area, and the hose is taken out by performing the above-described reverse operation, thereby completing the test. In this case, when the hose guide is provided such that the distal projecting height of the hose guide is higher than the horizontal height of the clamp means for compressing and closing the middle of the hose close to the connection fitting, the hose is required for the pressure test. The air remaining in the test area can be exhausted more completely to the outside, so that the test can be performed with higher accuracy and safety.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the specific contents of the present invention will be described with reference to the embodiment of FIGS. 1 to 6. In the drawings, B represents a box of the pressure resistance test apparatus according to the present invention having handles B1 on both sides. The box B has the following components attached thereto. That is, 1 is a hose connection pipe, 6 is a water tank, 7 is a pressurizing pump, 12 is a hose guide, and 16 is a clamping means. The hose connection pipe 1 is provided with metal fittings 2a and 2b which allow the connection fitting H1 of the fire hose H to be detachably connected thereto.
[0013]
The intermediate fittings 2a and 2b include a male fitting H2 2a and a female fitting H2 2b depending on the shape of the connecting fitting H1 of the fire hose H terminal. A water pressure gauge 4 and a drainage pipe 3 are connected to one side of the hose connection pipe 1, and a drainage valve 5 is attached to the drainage pipe 3. The water tank 6 uses the inner bottom portion of the box B as it is, and supplies a necessary amount of water to the water tank unit 6 when using the present test apparatus.
[0014]
The pressurizing pump 7 is a known manual operation in which one end of a handle 7a having a handle grip 7d attached to a free end thereof via a pin 7c is rotatably attached to an upper end of a hinge 7b rising from the inner bottom of the box B. Although a type pump is used, a drive pump using an electric motor may be used. Further, a main valve 9 and a safety valve 10 are interposed between the pressurizing pump 7 and the hose connection pipe 1 described above, and these are connected to the hose connection pipe 1 by pipes 8 and 11.
[0015]
On the other hand, the hose guide 12 has a diameter slightly smaller than the inner diameter of the fire hose H, and has a sufficient length to reach a substantially intermediate position in the test section of the hose H. 1 is screwed into the upper portions of the metal fittings 2a and 2b, so as to project upward. Further, an air vent hole 12a is formed in the hose guide 12 from the mounting base to the protruding tip, and the vent fitting 2a or 2b for communicating the air in the test section of the hose H from the tip of the hose guide 12 and the air vent from the pipe 13. It is configured to be able to discharge to the outside of the hose connection pipe 1 via the valve 13V.
[0016]
As shown in FIG. 5, the length of the hose guide 12 in this case is such that the tip end protruding height Ha when the hose guide 12 is attached to the intermediate metal fitting 2a or 2b is closer to the hose fitting described later. If the length is set to a height that is higher than the horizontal height Hb of the clamp means 16 for compressing and closing the middle, air remaining in the test area of the hose H during the pressure test of the hose H is removed by the hose guide 12. It is easy to guide to the air vent hole 12a opened at the upper end portion, and a more accurate and safe test can be performed.
[0017]
The clamp means 16 further comprises a clamp bar 15 provided on each of the free ends of the arms 14 having one end rotatably attached to both ends of the box B. The clamp bar 15 has a hose pressing plate 17 and the hose The holding plate 17 has a fastening screw 18 that can be fastened to the clamp bar 15. Although not particularly shown, the arms 14 in this case are configured to be able to extend and contract in the length direction by sliding a separate member having a somewhat smaller diameter inward.
[0018]
In the above-described configuration, first, an appropriate amount of water is replenished into the water tank 6, and the end opening of the fire hose H to be tested is covered with the hose guide 12 which is erected on the intermediate fitting, and then the base thereof is further closed. The connection fitting H1 at the end of the fire hose H is hermetically fitted into the intermediate fittings 2a and 2b. Next, a fixed distance (for example, 20 to 30 cm) from the connection fitting H1 is set as a test section, a position spaced a predetermined distance from the connection fitting H1 is hooked on the clamp bar 15, and a tightening screw 18 is inserted via a hose holding plate 17. To secure.
[0019]
Next, only the safety valve 10 suitable for the operating pressure value of the fire hose H to be tested is opened, the other safety valves 10 are kept closed, the main valve 9 and the air release valve 13V are opened, and the handle of the pressure pump 7 is opened. 7a, the water in the water tank 6 is introduced into the hose connection pipe 1 via the pipes 8 and 11, and from the hose connection pipe 1 as shown in FIG. Water is fed along the inner side surface of the guide 12 and the fire hose H toward the distal end of the hose guide 12 while pushing up the remaining air as indicated by the arrow a, and further toward the direction in which the hose is clamped by the clamp means 16.
[0020]
On the other hand, when a certain amount of water is fed into the hose on the side clamped by the clamp means, the air remaining in the hose H escapes along the hose H toward the distal end of the hose guide 12, and Due to the pressure of the supplied water, the water is released from the air discharge port through the air release valve 13V through the pipe 13 as shown by the arrow b from the air release hole 12a formed in the hose guide 12. When the air in the hose H and the air vent hole 12a and the pipe 13 is completely removed, water comes out subsequently. At that point, the air vent valve 13V is closed, and the hose 7 is tested by the pump 7. Pressurize water in the area.
[0021]
As the water pressure in the test area of the hose H increases, the hose H rises rigidly, and accordingly the arms 14, 14 elongate and rise to move the clamp means 16 to a position above the hose guide 12 (FIG. 6). When a predetermined test pressure value is reached by the water pressure gauge 4, the main valve 9 is closed, and the test pressure value is maintained for a predetermined time (for example, 5 minutes) to check whether or not there is a pressure change by the water pressure gauge 4. If the water pressure drops, the fire hose H is recognized as a disqualified product.
[0022]
If water leaks from the fire hose H during the start of the test (while pressurizing by the pressurizing pump 7), it is determined to be a disqualified product at that point and the test is immediately terminated. After the pressure resistance test is completed, the drain valve 5 is opened to drain the water in the hose H, then the clamp means 16 is released, and the connection fitting H1 is removed from the intermediate fittings 2a and 2b to take out the fire hose H.
[0023]
【The invention's effect】
INDUSTRIAL APPLICABILITY As described above, the present invention provides a hose connection pipe having an intermediate fitting capable of detachably connecting a connection fitting of a hose terminal, a water tank for pumping and discharging water into the hose through the hose connection pipe, and a pressurizing apparatus. Consists of a pump and clamp means for compressing and closing the middle of the hose near the fitting. Therefore, when conducting a pressure test of a fire hose, it is possible to attach the hose end to the intermediate metal fitting along the hose guide. It is easy to remove and workability is improved.
[0024]
In addition, since the hose guide is inserted into the test area of the hose, the amount of water used is reduced by the volume of the hose guide, so that not only the test time is shortened but also the handleability is significantly improved. Further, the hose guide has an air vent hole formed from the mounting base to the projecting tip, so that air in the hose test section can be discharged to the outside of the hose connection pipe via a metal fitting and a valve communicating from the hose guide tip. As compared with the conventional device, the uncertainty of the leak recognition due to the pressure value error caused by the resident air in the hose can be eliminated, and the risk of rupture due to deterioration of the hose or the like can be prevented.
[0025]
In addition, since the projecting height of the hose guide is set higher than the horizontal height of the clamp means that presses and closes the middle of the hose near the fitting, the pressure test of the fire hose was conducted. In doing so, the removal of resident air within the hose test area is more complete.
[Brief description of the drawings]
FIG. 1 is a plan view of an apparatus for testing the pressure resistance of a fire hose terminal according to an embodiment of the present invention.
FIG. 2 is a schematic sectional view taken along the line AA in FIG.
FIG. 3 is a schematic sectional view of a BB part in FIG. 1;
FIG. 4 is a schematic side view of the pressure resistance test apparatus of FIG. 1;
FIG. 5 is a partial cross-sectional view showing a state where a terminal of a fire hose is attached to a hose connection pipe.
FIG. 6 is a partial cross-sectional view showing a state where water is pumped into the test area of the fire hose and expanded in the state of FIG. 5;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Hose connection pipe 2a Intermediate metal fitting 2b Intermediate metal fitting 3 Drainage pipe 4 Water pressure gauge 5 Drainage valve 6 Water tank part 7 Pressure pump 8 Pipe 9 Main valve 10 Safety valve 11 Pipe 12 Hose guide 13 Pipe 13V Air release valve 14 Arm 15 Clamp bar 16 Clamping means 17 Hose holding plate 18 Tightening screw B Box H Fire hose H1 Connection fitting

Claims (3)

Hose connection pipe having an intermediate metal fitting to which a connection fitting of a hose terminal can be detachably connected, a water tank and a pressure pump for pumping and discharging water into the hose via the hose connection pipe, and a hose connection fitting It is composed of clamp means that presses and blocks the middle of the approach, and the intermediate fitting has a hose guide of a fixed length inserted into the hose and protrudes toward the hose connection direction. A pressure test device for the hose end. An air vent hole is formed in the hose guide protruding from the medial fitting from the mounting base to the protruding tip, and the air in the hose test section is passed out of the hose connection pipe via the medial fitting and valve that communicates from the hose guide tip. 2. The pressure test apparatus for a fire hose terminal according to claim 1, wherein the pressure test apparatus is capable of discharging. 3. The hose guide according to claim 1, wherein the projecting height of the tip end of the hose guide is provided to be higher than the horizontal height of the clamp means that presses and closes the middle of the hose near the connection fitting. 4. A pressure test device for the fire hose end.

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