Air tightness detection device for fire hose

Abstract

The utility model belongs to the technical field of safety detection of fire hoses, and particularly relates to an air tightness detection device for a fire hose, which comprises a water storage tank, fixing seats with exhaust pipes are fixed on two sides of the water storage tank, a pressure relief opening is arranged on the inner wall of the water storage tank, a valve core is slidably arranged in the pressure relief opening, a floating plate is fixed on the valve core, and a floating ball is arranged on the floating plate. During detection, the two ends of the water hose are sleeved with the fixing bases and fixed through the fixing sleeves, the water pump conveys water to the water hose, in the initial stage, the floating ball and the floating plate are in the low position to enable the exhaust pipe to be communicated to exhaust air, the pre-tightening spring is in the maximum pre-tightening state, the pressure relief threshold value of the valve element is increased, and mistaken pressure relief caused by short-time pressure fluctuation is avoided; after the water hose is filled with water, the floating ball floats upwards to block the exhaust pipe, the floating plate pushes the connecting plate to move upwards to reduce the deformation quantity of the pre-tightening spring, and the pressure relief threshold value returns to normal; the water pump is adjusted to increase the pressure in the water hose to preset detection pressure, the water pump is closed, and the valve enters a pressure maintaining stage.

Description

TECHNICAL FIELD

[0001] The utility model belongs to fire -fighting water hose safety detection technical field, and specifically points to a kind of air tightness detection device for fire -fighting water hose. BACKGROUND

[0002] Fire hose as the key water delivery component in fire-fighting system, if fire hose exists air tightness defect, possibly lead to leakage, pressure sudden drop and other problems in water delivery process, reduce fire efficiency, currently, fire hose air tightness detection mainly relies on traditional water pressure test mode, by injecting certain pressure water into water hose, observe pressure change or whether leakage phenomenon to judge air tightness is qualified, however, traditional fire hose air tightness detection device has the following problems:

[0003] If residual air in water hose is not fully discharged during detection process, air blockage phenomenon is easily formed, leading to that the pressure value shown by pressure gauge cannot accurately reflect the water pressure actually borne by water hose wall surface, and further, misjudgment occurs, even if pressure gauge reaches preset detection pressure, water hose can not be completely filled with water, and in subsequent pressure maintaining stage, penetration or expansion of residual air can cause abnormal pressure drop, and qualified water hose is misjudged as unqualified product, unnecessary detection cost and resource waste are increased;

[0004] The pressure relief mechanism of traditional detection device is mostly designed with fixed threshold, cannot be flexibly adjusted according to actual demand of detection stage, and when short-time pressure fluctuation is caused by residual air in initial pressure rising stage, pressure relief is easily triggered by mistake, and detection process is interrupted. INVENTION CONTENTS

[0005] The utility model overcomes the insufficient of prior art, provides a kind of air tightness detection device for fire -fighting water hose, float ball slides along the inner wall of water collecting tank along with the change of water quantity in water hose, maintains exhaust pipe conduction to exhaust initial air when water flow is less, and exhaust pipe is automatically blocked after water filling to prevent water or air reverse leakage, avoid air blockage in water hose from structure, solve the problem that pressure gauge misindicates real water pressure caused by air blockage, pressure abnormally drops in pressure maintaining stage, and further misjudge air tightness, pre-tightening spring is in maximum pre-tightening state when float ball is in low position in exhaust stage, and valve core pressure relief threshold is adjusted to avoid short-time pressure fluctuation mistriggering pressure relief when air is exhausted, ensure that pressure rises stably, and pre-tightening spring deformation amount is reduced when float plate pushes slider to move up after water filling, so that pressure relief threshold returns to normal to realize subsequent pressure maintaining or safety pressure relief when pressure is abnormal.

[0006] The utility model discloses adopt the technical scheme as follows: the scheme provides a kind of air-tightness detection device for fire hose, including water collecting tank, the fixed seat is fixed in the both sides of water collecting tank, for the two ends of the sleeve joint fire hose, provide passageway for water flow to enter fire hose, the fixed seat circumferential wall is fixedly provided with exhaust pipe, in the initial stage of filling water of fire hose, the air originally existing in fire hose is discharged, avoid air gathering in water hose and form air block, the inner wall of water collecting tank is slidably provided with floating plate, pressure relief port is set in the inner wall of water collecting tank, protect fire hose from damage due to overpressure, the pressure relief port is slidably provided with valve core, floating ball is fixedly arranged on the floating plate, for the outlet of the exhaust pipe.

[0007] Further, the inner wall of the water collecting tank is threadedly connected with a pre-tightening bolt, the initial pre-tightening force of the valve core is set, the bottom end of the pre-tightening bolt is slidably provided with a sliding block, and the bottom end of the sliding block is fixedly connected with the top wall of the floating plate.

[0008] Further, the valve core is fixedly provided with a pre-tightening spring, one end of the pre-tightening spring is fixedly connected with the bottom wall of the floating plate, and the other end of the pre-tightening spring provides a pre-tightening force for the valve core.

[0009] Further, the circumferential wall of the fixed seat is sleeved with a fixed sleeve, the fixed sleeve is composed of two semicircular rings which are the same in structure, and the two semicircular rings are fixedly connected by bolts, so that the fire hose is tightly pressed on the fixed seat.

[0010] Further, the outer wall of the water collecting tank is fixedly provided with a water pump, the water pump is communicated with the inner cavity of any fixed seat, and the water pump fills water in the fire hose and increases the pressure.

[0011] The utility model has the beneficial effects as follows by adopting the above structure:

[0012] (1) the exhaust pipe is used for discharging the air initially existing in the fire hose, and the sliding cooperation of the floating ball and the floating plate can adjust the on-off state of the exhaust pipe according to the water volume change in the fire hose; when the water volume is small, the floating plate and the floating ball are at low position due to small buoyancy, the exhaust pipe is kept on, and the air is continuously and smoothly discharged; when the air in the fire hose is discharged and the water fills the cavity, the floating ball floats up to block the exhaust pipe, so that water or air is prevented from being reversely leaked when the subsequent pressure rises, the air block in the fire hose is avoided, and the accuracy of the detection result is improved.

[0013] (2) In the exhaust phase, the low position of the floating ball makes the valve core small upward floating force, the slider is in the low position under the maximum pre-tightening state of the pre-tightening spring, at this time, the valve core pressure relief threshold is adjusted to be high, which can effectively avoid the false triggering of pressure relief caused by the short-time pressure fluctuation in the air exhaust process in the fire hose, guarantee the stability of the pressure rising process, ensure that the pressure in the fire hose can steadily rise to the preset detection pressure, avoid the detection interruption or pressure instability problem caused by frequent pressure relief, when the fire hose is filled with water, the floating plate pushes the slider to move up, the pre-tightening spring deformation decreases, the pressure relief threshold returns to normal, and the pressure relief protection function can be played in time when the subsequent pressure is kept or abnormal. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 A use state structure schematic view of the air tightness detection device for the fire hose is provided for the utility model;

[0015] Figure 2 A use state structure schematic view of the air tightness detection device for the fire hose is provided for the utility model;

[0016] Figure 3 For Figure 2 A partial enlarged view of the middle A part.

[0017] 1, water collecting tank, 2, fixed seat, 3, exhaust pipe, 4, valve core, 5, floating plate, 6, floating ball, 7, pre-tightening bolt, 8, slider, 9, pre-tightening spring, 10, fixed sleeve, 11, water pump, 12, pressure relief port.

[0018] The drawings are used to provide further understanding of the utility model, and constitute a part of the specification, together with the embodiments of the utility model, for explaining the utility model, and do not constitute the limitation of the utility model. DETAILED DESCRIPTION

[0019] The technical scheme in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model, obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments; based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the protection scope of the utility model.

[0020] Embodiment one: please refer to Figures 1-3The embodiment provides airtightness detection device for fire hose, including water collecting tank 1, both sides of which are fixedly provided with fixed seat 2, the circumference wall of fixed seat 2 is fixedly provided with exhaust pipe 3, the inner wall of water collecting tank 1 is slidably provided with floating plate 5, the inner wall of water collecting tank 1 is provided with pressure relief port 12, the pressure relief port 12 is slidably provided with valve core 4, the inner wall of water collecting tank 1 is threadedly connected with pre-tightening bolt 7, the bottom end of pre-tightening bolt 7 is slidably provided with sliding block 8, the bottom end of sliding block 8 is fixedly connected with the top wall of floating plate 5, pre-tightening spring 9 is fixedly nested in valve core 4, the other end of pre-tightening spring 9 is fixedly connected with the bottom wall of floating plate 5, floating ball 6 is fixedly arranged on floating plate 5, and floating ball 6 is coaxial with exhaust pipe 3;The circumference wall of fixed seat 2 is sleeved with fixed sleeve 10, fixed sleeve 10 is composed of two semicircular rings with same structure, the two semicircular rings are fixedly connected by bolts, water pump 11 is fixedly arranged on the outer wall of water collecting tank 1, and water pump 11 is communicated with the inner cavity of any fixed seat 2.

[0021] In the embodiment, the two ends of the fire hose are sleeved on the two fixed seats 2 respectively, the two semicircular rings of the fixed sleeve 10 are sleeved on the connection between the fire hose and the fixed seat 2, so that the fire hose is tightly fixed on the fixed seat 2, and the fire hose is prevented from falling off or leaking during detection.

[0022] When water pump 11 sends water into the inner cavity of fixed seat 2 and then into the fire hose, the original air in the fire hose is discharged through exhaust pipe 3 on the circumference wall of fixed seat 2 under the push of water flow, when the water flow is small, the buoyancy on floating plate 5 and floating ball 6 is small, and floating plate 5 and floating ball 6 are in a low position, exhaust pipe 3 is kept open, so that the air can be continuously and smoothly discharged, and at the same time, since floating ball 6 is in a low position, the upward buoyancy on valve core 4 is small, valve core 4 is in a low position, sliding block 8 is in a low position under the action of pre-tightening spring 9, pre-tightening spring 9 is in a maximum pre-tightening state, so that the pressure relief threshold of valve core 4 is increased, air blockage in the fire hose is avoided, short-term pressure fluctuation in the fire hose is avoided, and the stability of the pressure increasing process is ensured.

[0023] With the continuous water supply of water pump 11, the air in the fire hose is gradually discharged, the water flow fills the cavity of the fire hose, and the pressure in the fire hose starts to steadily rise, when the fire hose is completely filled with water, floating plate 5 and floating ball 6 gradually float up under the action of the buoyancy of water flow, floating ball 6 floats up to contact the outlet of exhaust pipe 3, so that the outlet of exhaust pipe 3 is blocked, at this moment, exhaust pipe 3 stops discharging, at the same time, floating ball 6 drives floating plate 5 to move upwards, floating plate 5 drives sliding block 8 to move upwards through pre-tightening spring 9, the deformation amount of pre-tightening spring 9 is reduced, the elastic force gradually recovers to a preset value, and the pressure relief threshold of valve core 4 also returns to a normal setting value.

[0024] Continue to adjust the frequency converter of the water pump 11, slowly increase the pressure in the fire hose to the preset detection pressure, close the water pump 11, and close the valves at the inlet and outlet of the water pump 11, enter the pressure maintaining detection stage, and the air tightness of the fire hose can be determined.

[0025] The above describes the utility model and its implementation mode, which is not restrictive, and the drawings shown are only one of the implementation modes of the utility model, and the actual structure is not limited thereto. In summary, if a person skilled in the art is inspired thereby, without departing from the creative purpose of the utility model, similar structure modes and embodiments are not creatively designed, which should belong to the protection scope of the utility model.

Claims

1. An air tightness testing device for fire hose, comprising a water collecting tank (1), characterized in that, The fixed seat (2) is fixed on both sides of the water collecting tank (1), an exhaust pipe (3) is fixed on the circumferential wall of the fixed seat (2), a floating plate (5) is slidably arranged on the inner wall of the water collecting tank (1), a pressure relief port (12) is formed in the inner wall of the water collecting tank (1), a valve core (4) is slidably arranged in the pressure relief port (12), and a floating ball (6) is fixedly arranged on the floating plate (5).

2. The air tightness detection device for fire hose according to claim 1, characterized in that: A pre-tightening bolt (7) is threadedly connected to the inner wall of the water collecting tank (1), a sliding block (8) is slidably arranged at the bottom end of the pre-tightening bolt (7), and the bottom end of the sliding block (8) is fixedly connected to the top wall of the floating plate (5).

3. The air tightness detection device for fire hose according to claim 1, characterized in that: The valve core (4) is fixedly arranged with a pre-tightening spring (9) in a nested manner, and the other end of the pre-tightening spring (9) is fixedly connected to the bottom wall of the floating plate (5).

4. The air tightness detection device for fire hose according to claim 1, characterized in that: The circumferential wall of the fixed seat (2) is sleeved with a fixed sleeve (10).

5. The air tightness detection device for fire hose according to claim 1, characterized in that: A water pump (11) is fixedly arranged on the outer wall of the water collecting tank (1), and the water pump (11) is in communication with the inner cavity of any fixed seat (2).

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