JP3911693B2 - Pressure test equipment for fire hose terminal - Google Patents

Description

[0001]
BACKGROUND 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 the presence or absence of an appropriate pressure resistance.
[0002]
[Prior art]
The inner surface of the hose near the end of the fire hose has a relatively rapid progress of brittleness due to oxidation due to the influence of outside air coming in and out of the opening of the connection fitting, and it is severely deteriorated due to repeated extreme bending due to the weight of the connection fitting. High-pressure water supply may leak in an emergency. As a means for inspecting the pressure resistance of the portion near the connecting fitting of the hose, the “hose leak detection device” disclosed in the registered utility model publication No. 3011079 is relatively versatile in terms of convenience and reliability. Has 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 is provided in communication with the hose connection pipe, and is water-filled and drained to the hose via the connection fitting. A possible water-filled water draining device, a pressurizing device which is provided in communication with the hose connection pipe and pressurizes the hose via the connection fitting, and the hose body in the vicinity of the joint fitting is clamped in the closed state And a clamping device.
[0004]
When detecting leakage of a hose using this device, the hose body is sandwiched and closed by a clamping device, and water is supplied to the hose by a water filling and draining device provided in communication with the hose connection pipe. Further, the hose is pressurized by a pressurizing device provided in communication with the hose connection pipe, and the leakage of the hose is detected by detecting the pressure change.
[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, not only is there danger when it ruptures due to deterioration of the hose, etc., but also the compression heat of the air As the water gradually cools, the water filling pressure fluctuates, and as a result, it tends to be misidentified as a hose leak. In addition, when the inner diameter of the hose is large, the amount of water filling or drainage increases, and the pressurizing operation by the pressurizing device is not easy.
[0006]
[Means for Solving the Problems]
Therefore, the present invention, when performing a pressure resistance test of the hose, completely removes the air remaining in the hose and reduces the amount of water supplied to the test area of the hose to facilitate the pressurization operation. The hose connecting pipe having the intermediate fitting that can be detachably connected to the connecting fitting of the hose terminal is provided. , A water tank and a pressure pump for pumping and discharging water into the hose through the hose connection pipe, and clamping means for compressing and closing the middle of the hose connection bracket. while it is charged, toward the protruding tip from the mounting base of the hose guide is formed an air vent hole, mediated fitting communicates air in the hose test interval from the hose guide tips and About pressure test device fire hose terminal portion is characterized in that hose guides predetermined length which enables releasing the hose connecting pipe outside is projected toward the connecting direction of the hose through the lube.
[0008]
Further the second aspect of the present invention, the tip protrusion height of the hose guide, than the horizontal level of the clamping means for compressing blocks the way of fitting side of the hose where are provided so as a high position, claim 1. A pressure test apparatus for a fire hose terminal section according to 1 .
[0009]
In the above-described configuration, the hose terminal fitting is covered with the hose guide, guided toward the base of the hose guide, the fitting is attached to the intermediate fitting, and the hose is closer to the hose fitting by the clamping means. Set the test area of the hose with compression occlusion. In this state, the air vent valve is opened, and the pressurizing pump is operated to feed the water in the water tank into the test area in the hose through the hose connecting pipe and the intermediate fitting. Along with this, residual air in the test area is pressed from the tip of the hose guide toward the base, and is discharged outward from the air vent valve via the intermediate fitting.
[0010]
When the air in the test area gradually decreases and water begins to spout from the air vent valve, close the air vent valve and further activate the pressure pump to pump a sufficient amount of water into the test area. . When the preset test pressure is reached, stop the operation of the pressurization pump and maintain it for a certain period of time (for example, 5 minutes) to monitor the change in pressure value. to decide. Moreover, the presence or absence of a water leak and a location can also be confirmed visually at that time.
[0011]
After the test is completed, each valve is opened to drain water from the test area, and the hose is removed by performing the opposite operation described above. Note in this case, the end projecting height of the hose guide, in order to provided such that the position higher than the horizontal level of the clamping means for compressing blocks the way of fitting side of the hose, when the withstand voltage test of the hose The air remaining in the test area can be discharged more completely to the outside, and the test can be performed with higher accuracy and safety.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
In the following, the specific contents of the present invention will be described based on the embodiment of FIGS. 1 to 6. In the figure, B represents a box of a pressure test apparatus according to the present invention having a handle B1 on both sides. Further, the following parts are attached to the box B. That is, 1 is a hose connection pipe, 6 is a water tank, 7 is a pressure pump, 12 is a hose guide, and 16 is a clamping means. The hose connection pipe 1 is provided with intermediate fittings 2a and 2b that allow the connection fitting H1 provided at the end of the fire hose H to be detachably connected.
[0013]
The intermediate fittings 2a and 2b are provided with a male connection fitting H1 2a and a female connection fitting H1 2b depending on the shape of the connection fitting H1 of the fire hose H terminal. A pressure gauge 4 and a drain pipe 3 are connected to one side of the hose connection pipe 1, and a drain valve 5 is attached to the drain pipe 3. Moreover, the water tank 6 uses the inner bottom part of the box B as it is, and supplies a required amount of water to the water tank part 6 when using this test apparatus.
[0014]
Here, the pressurizing pump 7 has a known manual operation in which one end of a handle 7a having a handle grip 7d attached to a free end 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, an original 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 a pipe 8 and a pipe 11.
[0015]
On the other hand, the hose guide 12 has a thickness that is 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 part of the intermediate fittings 2a and 2b so as to project upward. Further, the hose guide 12 is formed with an air vent hole 12 a from the mounting base to the projecting tip, and the air in the test section of the hose H is communicated from the tip of the hose guide 12 and the metal fitting 2 a or 2 b and the pipe 13 are vented. It is comprised so that it can discharge | release outside the hose connection pipe 1 via the valve | bulb 13V.
[0016]
In addition, as shown in FIG. 5, the length of the hose guide 12 in this case is such that the tip protruding height Ha when it is attached to the intermediate fitting 2a or 2b is closer to the hose connection fitting described later. If the length is set to be higher than the horizontal height Hb of the clamping means 16 that compresses and closes the middle, air remaining in the test area of the hose H during the pressure resistance test of the hose H is supplied to the hose guide 12. It is easy to guide to the air vent hole 12a opened at the upper end of the head, making it possible to carry out a more accurate and safe test.
[0017]
Further, the clamp means 16 has a clamp bar 15 installed on each free end of the arms 14 and 14 having one end rotatably attached to both ends of the box B. The clamp bar 15 has a hose presser plate 17 and the hose. A clamp screw 18 that can clamp the presser plate 17 to the clamp bar 15 is provided. Although not specifically shown, the arms 14 and 14 in this case are configured to be extendable in the length direction along with another member having a slightly smaller diameter on the inside.
[0018]
In the above-described configuration, first, an appropriate amount of water is replenished into the water tank 6, and the end opening to be tested of the fire hose H is placed on the hose guide 12 planted on the intermediate bracket, and then the base portion is further provided. The fittings H1 provided at the end of the fire hose H are fitted into the intermediate fittings 2a and 2b in an airtight manner. Next, a fixed distance (for example, 20 to 30 cm) from the connection fitting H1 is set as a test section, a position spaced by a fixed distance from the connection fitting H1 is hung on the clamp bar 15, and the tightening screw 18 is connected via the hose retainer plate 17. Tighten and fix with.
[0019]
Next, only the safety valve 10 suitable for the working pressure value of the fire hose H to be tested is opened, the other safety valves 10 are kept closed, the original valve 9 and the air vent valve 13V are opened, and the handle of the pressurizing pump 7 is opened. 7a is operated to supply water in the water tank 6 into the hose connecting pipe 1 through the pipe 8 and the pipe 11, and from the inside of the intermediate fittings 2a and 2b as shown in FIG. 5 from the hose connecting pipe 1. While pushing up the remaining air along the inner side surface of the guide 12 and the fire hose H, water is fed in the direction of the tip of the hose guide 12 and further in the direction clamped by the clamping means 16 as shown by the arrow a.
[0020]
On the other hand, when a certain amount of water is fed into the hose near the side clamped by the clamping means, the air remaining in the hose H escapes along the hose H toward the tip of the hose guide 12, As shown by the arrow b, the air is discharged from the air discharge port through the pipe 13 through the air vent valve 13V from the air vent hole 12a formed in the hose guide 12 by the pressure of the water to be fed. 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 time, the air vent valve 13V is closed, and the hose H is tested by the pump 7. Pressurize water in the area.
[0021]
As the water pressure in the test area in the hose H increases, the hose H stands upright, and along with this, the arms 14 and 14 stand up while extending to move the clamping means 16 to a position above the hose guide 12 (see FIG. 6). When a predetermined test pressure value is reached by the water pressure gauge 4, the original valve 9 is closed and maintained for a certain time (for example, 5 minutes) while the test pressure value has been reached. If the water pressure drops, the fire hose H is certified as a disqualified product.
[0022]
If water leaks from the fire hose H during the start of the test (during pressurization by the pressurizing pump 7), it is recognized as a disqualified product at that time and the test is immediately terminated. After completion of the pressure resistance test, the drain valve 5 is opened to discharge the water in the hose H, the clamp means 16 is released, the connection fitting H1 is removed from the intermediate fittings 2a and 2b, and the fire hose H is taken out.
[0023]
【The invention's effect】
As described above, the present invention provides a hose connection pipe having an intermediate fitting that can be detachably connected to a connection fitting of a hose terminal, a water tank and a pressurization for pumping and discharging water into the hose via the hose connection pipe. It consists of a pump and a clamping means that compresses and closes the middle of the hose connection fitting, and the intermediate fitting is inserted into the hose, and an air vent hole is formed from the mounting base of the hose guide to the protruding tip, Check that a fixed length of hose guide that protrudes to the outside of the hose connection pipe through the metal fittings and valves that communicate the air in the hose test section from the tip of the hose guide protrudes in the hose connection direction. Because it is a characteristic, it is possible to attach the hose end part to the intermediate bracket while keeping the hose end along the hose guide when performing the pressure resistance test of the fire hose. , It tends to have detachable mediated fittings and hose mounting brackets for its workability is improved.
[0024]
In addition, since the hose guide is inserted into the test target area of the hose, the amount of water used is reduced not only by the volume of the hose guide, but also the test time is shortened and the handleability is remarkably improved. In addition, the hose guide has an air vent hole from the mounting base to the projecting tip, so that the air in the hose test section can be released to the outside of the hose connection pipe via the intermediate fitting and valve communicating from the hose guide tip. Compared with conventional devices, it is possible to eliminate the uncertainty of leak certification due to pressure value error caused by the air staying in the hose, and to prevent the risk of rupture due to deterioration of the hose.
[0025]
In addition, the hose guide's tip protruding height is set higher than the horizontal height of the clamping means that compresses and closes the middle of the hose connection bracket, so the fire hose is tested for pressure resistance. In doing so, the removal of the resident air within the test area of the hose becomes more complete.
[Brief description of the drawings]
FIG. 1 is a plan view of a pressure resistance test apparatus for a fire hose terminal portion according to an embodiment of the present invention.
FIG. 2 is a schematic cross-sectional view taken along the line AA in FIG.
FIG. 3 is a schematic cross-sectional view taken along the line BB in FIG.
4 is a schematic side view of the pressure test apparatus of FIG. 1;
FIG. 5 is a partial cross-sectional view showing a state where a fire hose end is attached to a hose connection pipe.
6 is a partial cross-sectional view showing a state where water is pumped and expanded in a test area of a fire hose in the state of FIG. 5;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Hose connection pipe 2a Intermediary metal fitting 2b Intermediary metal fitting 3 Drainage pipe 4 Water pressure gauge 5 Drainage valve 6 Water tank part 7 Pressure pump 8 Pipe 9 Original valve 10 Safety valve 11 Pipe 12 Hose guide 13 Pipe 13V Air vent valve 14 Arm 15 Clamp bar 16 Clamping means 17 Hose presser plate 18 Tightening screw B Box H Fire hose H1 Connecting bracket

Claims (2)

A hose connection pipe having an intermediate fitting capable of detachably connecting a connection fitting of a hose terminal, 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 consists of a clamping means that compresses and closes the middle of the side, and the intermediate bracket is inserted into the hose, and an air vent hole is formed from the mounting base of the hose guide to the protruding tip to A hose terminal for fire fighting, characterized in that a hose guide of a certain length that can be discharged out of the hose connection pipe through a metal fitting and valve communicating from the tip of the hose guide is projected toward the hose connection direction. Pressure resistance test equipment. The fire hose terminal according to claim 1 , wherein the height of the protruding end of the hose guide is higher than the horizontal height of the clamping means that compresses and closes the middle of the hose connection bracket. Pressure resistance test equipment.

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