Anti-liquid-return and anti-bubble fire engine tank body

Abstract

The application discloses a back-liquid-preventing and air-bubble-preventing fire engine tank body, which comprises a box body, a liquid suction pipe and a back-liquid-preventing and air-bubble-preventing liquid injection device. The liquid suction pipe is arranged at the bottom of the box body, and the back-liquid-preventing and air-bubble-preventing liquid injection device is arranged in the box body and is at least one. The back-liquid-preventing and air-bubble-preventing liquid injection device comprises a liquid injection cage, an upper liquid injection port is in a tubular structure, one end of the upper liquid injection port is communicated with the outside of the box body, the other end of the upper liquid injection port extends from the inside of the liquid injection cage to the top of the liquid injection cage, a plurality of liquid blocking balls are arranged in the liquid injection cage, the density of the liquid blocking balls is smaller than the density of water, the upper liquid injection port is located at one end of the top and faces the liquid blocking balls, a maintenance door is arranged on one side surface of the liquid injection cage in the box body, and the wall surfaces of the liquid injection cage and the maintenance door are both provided with dense holes. The independent gas-liquid separation space is arranged in the limited space, so that the bubbles generated by water injection have enough space to escape, and the air content of the water finally sucked into the pump is reduced. The overall water flow fluctuation in the tank is reduced, and the fire water suction performance is stable.

Description

Technical Field

[0001] The invention relates to a fire truck tank body, in particular to a fire truck tank body that prevents liquid backflow and bubbles. Background Art

[0002] As a key component of the firefighting system, the fire truck tank plays a vital role in firefighting operations. During firefighting operations, the ability to continuously operate in relay operations is the key to effectively extinguishing the fire.

[0003] At present, the conventional liquid tank structure of a fire truck generally includes a tank body, a liquid suction pipe, and is equipped with a downward liquid injection pipe group or an upward liquid injection pipe group. For fire truck liquid tanks equipped with a downward liquid injection pipe group, since there is no backflow prevention, if the liquid injection valve is not cut off in time when the liquid injection operation is interrupted or ended, the liquid in the tank will flow back from the liquid injection pipe. When relay operation is required, the fire pump of the rear vehicle and the liquid injection valve of the front vehicle need to be frequently started and closed to respond, which is inconvenient to operate. Moreover, during liquid injection, especially when the liquid level is low, the water flow in the tank is prone to impact, blooming, splashing, and falling back, generating a large number of bubbles that are sucked into the pump, causing the pump to vibrate and make noise, and reducing the head and flow rate, making it impossible for the fire pump of the front vehicle to work stably, that is, it cannot be used in relay water supply and continuous combat situations.

[0004] For fire truck tanks equipped with downward-flipping injection pipes, the injection pipes flip upward to the top and then downwardly inject liquid. This can temporarily prevent liquid backflow, but if the liquid level is high after injection and the water body shakes, liquid will still rush into the injection pipe, thus causing backflow. When the liquid is injected in a relay operation, the impact of the injected water flow and the liquid level in the tank will also generate a large number of bubbles that are sucked into the pump, causing vibration and noise in the pump, reducing the head and flow rate, and even causing mechanical damage, suspending firefighting operations. In other words, it is not suitable for continuous water supply operations.

[0005] When the layout space of the fire truck is small, or the user requires a large foam tank and a small water tank space, the distance between the water suction port and the water filling port is closer, and the shortcomings of the above two existing fire truck liquid tanks are particularly exposed. Summary of the Invention

[0006] Purpose of the invention: In view of the above problems, the purpose of the present invention is to provide a fire truck tank body with anti-liquid backflow and anti-bubble function, so as to improve the stability of fire pump performance and enhance the continuous combat capability of fire relay operations.

[0007] Technical solution: A fire truck tank body with anti-liquid backflow and anti-bubble function, comprising a tank body, a liquid suction pipe, and an anti-liquid backflow and anti-bubble liquid injection device; the liquid suction pipe is arranged at the bottom of the tank body, and at least one anti-liquid backflow and anti-bubble liquid injection device is arranged in the tank body;

[0008] The anti-backflow and anti-bubble liquid injection device includes a liquid injection cage, and the upper liquid injection port is a tubular structure, one end of which is connected to the outside of the box body, and the other end extends from the inside of the liquid injection cage to its top. A plurality of liquid-shielding balls are arranged in the liquid injection cage, and the density of the liquid-shielding balls is less than the density of the water body. The upper liquid injection port is located at one end of the top facing the liquid-shielding balls, and the inspection door is installed on one side of the liquid injection cage in the box body, and dense holes are provided on the wall surfaces of the liquid injection cage and the inspection door.

[0009] Furthermore, two anti-backflow and anti-bubble injection devices are provided in the box body, which are arranged relatively spaced apart and close to two adjacent top corners of the box body respectively, and the suction pipe is located between the two anti-backflow and anti-bubble injection devices.

[0010] Furthermore, the bottom of the liquid injection cage is connected to the inner bottom surface of the box body, and a plurality of water holes are arranged at intervals on the bottom edge of the liquid injection cage; the top of the liquid injection cage is connected to the inner top surface of the box body, and ventilation holes are arranged at intervals on the top edge of the liquid injection cage.

[0011] Optimally, both the water hole and the air vent are semicircular.

[0012] Furthermore, the tiling area of ​​the plurality of liquid-shielding balls after being laid out is greater than or equal to the horizontal cross-sectional area of ​​the liquid injection cage, so that the liquid-shielding balls can be spread out and float above the liquid in the liquid injection cage.

[0013] Preferably, the liquid-blocking ball is a hollow leather ball, a plastic ball, or a rubber ball.

[0014] Optimally, the liquid injection cage is provided with at least one inspection door which is detachably connected to the liquid injection cage.

[0015] Preferably, the liquid injection cage is a rectangular or cylindrical tube structure.

[0016] Beneficial effects: Compared with the prior art, the advantages of the present invention are:

[0017] 1. The present invention sets up an independent gas-liquid separation space in a limited space, so that bubbles that may be generated by water injection have enough space to escape, thereby reducing the gas content of the water finally sucked into the pump.

[0018] 2. A liquid injection cage is provided below the top water inlet of the present invention, and dense holes are provided on the wall of the liquid injection cage, so that bubbles in the water body after water injection are difficult to float up through the dense holes. The water body flows out from the lower dense holes, reducing the overall water flow fluctuation in the tank and stabilizing the fire-fighting water absorption performance.

[0019] 3. This invention utilizes top-injection technology. Liquid-shielding balls are placed in the lower injection cage. These balls, with a density lower than the water, float and fill the upper portion of the liquid in the cage. During injection, the liquid-shielding balls absorb the initial injection energy, reducing water shock. This de-energized water then flows back into the cage, minimizing bubble generation and further enabling gas-liquid separation.

[0020] 4. Because the liquid-blocking ball will also block the upper liquid injection port in the reverse direction, when the injection is interrupted or completed, there is no need to open or close the injection valve to prevent liquid backflow. It can also further prevent water from shaking and entering the water injection pipe to return liquid, thereby enhancing the anti-liquid backflow effect.

[0021] 5. The dense holes of the liquid injection cage and the liquid shielding balls of the present invention prevent the accumulation of liquid energy in the tank when the vehicle starts or brakes suddenly, which has the effect of preventing waves and makes the center of gravity of the vehicle more stable and safer. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure of the anti-liquid backflow and anti-bubble liquid injection device;

[0025] Figure 4 This is a schematic diagram of the three-dimensional structure of the anti-liquid backflow and anti-bubble liquid injection device;

[0026] Figure 5 Schematic diagram of the structure of the upper liquid injection port;

[0027] Figure 6 It is a structural diagram of the liquid injection cage;

[0028] Figure 7 Schematic diagram of the structure of the liquid-shielding ball;

[0029] Figure 8 This is a structural diagram of the inspection door. DETAILED DESCRIPTION

[0030] The present invention will be further described below with reference to the accompanying drawings and specific examples. It should be understood that these examples are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0031] A fire truck tank body with anti-liquid backflow and anti-bubble function, such as Figures 1 to 8 As shown, it includes a box body 1, a liquid suction pipe 2, and an anti-liquid backflow and anti-bubble liquid injection device 3.

[0032] The liquid suction pipe 2 is arranged at the bottom of the box body 1, and there is at least one anti-backflow and anti-bubble liquid injection device 3 in the box body 1. In this embodiment, two anti-backflow and anti-bubble liquid injection devices 3 are provided in the box body 1, which are arranged relatively spaced apart and respectively close to two adjacent top corners of the box body 1. The liquid suction pipe 2 is located between the two anti-backflow and anti-bubble liquid injection devices 3.

[0033] The anti-backflow and anti-bubble liquid injection device 3 includes a liquid injection cage 3.2, an upper liquid injection port 3.1 of a tubular structure, one end of which is connected to the outside of the box body 1, and the other end extends from the inside of the liquid injection cage 3.2 to its top. A plurality of liquid shielding balls 3.3 are arranged in the liquid injection cage 3.2. The density of the liquid shielding balls 3.3 is less than the density of the water body, so that they can float on the water surface.

[0034] The paved area of ​​the multiple liquid shielding balls 3.3 is greater than or equal to the horizontal cross-sectional area of ​​the liquid injection cage 3.2, so that the liquid shielding balls 3.3 can be spread over and float above the liquid in the liquid injection cage 3.2. The liquid shielding balls 3.3 can be hollow leather balls, plastic balls, rubber balls, or other irregularly shaped fillers, as long as their density is less than that of the fire-fighting liquid, and they can float and fill the upper part of the liquid injection cage. The upper liquid injection port 3.1 is located at one end of the top facing the liquid shielding balls 3.3. The inspection door 3.4 is installed on one side of the liquid injection cage 3.2 in the box body 1. At least one inspection door 3.4 is installed on the liquid injection cage 3.2, which is detachably connected to the liquid injection cage 3.2 to facilitate cleaning of any debris that may appear inside and replacement of the liquid shielding balls 3.3. The walls of the liquid injection cage 3.2 and the inspection door 3.4 are both provided with dense holes.

[0035] The present invention provides a liquid injection cage 3.2 below the top water inlet, and dense holes are provided on the wall of the liquid injection cage 3.2, so that bubbles in the water body after water injection are difficult to float up through the dense holes. The water body flows out from the lower dense holes, reducing the overall water flow fluctuation in the tank and stabilizing the fire-fighting water absorption performance.

[0036] The present invention utilizes top-injection technology. Liquid-shielding balls (3.3) are filled in the lower injection cage (3.2). These balls, with a density lower than the water, float and fill the liquid level above the injection cage. During injection, the shielding balls (3.3) absorb the initial injection energy, reducing water impact. The de-energized water then flows into the water in the injection cage (3.2), reducing bubble generation and further enabling gas-liquid separation.

[0037] The liquid injection cage 3.2 is a rectangular or cylindrical structure that isolates an independent gas-liquid separation space. The bottom of the liquid injection cage 3.2 is connected to the inner bottom surface of the casing 1, and multiple water holes are spaced apart along its bottom edge. The top of the liquid injection cage 3.2 is connected to the inner top surface of the casing 1, and air holes are spaced apart along its top edge. Both the water holes and the air holes are semicircular in shape. The water holes prevent water accumulation, and the air holes prevent air stagnation.

[0038] The present invention greatly improves the liquid injection and absorption performance of the fire fighting tank body, and the overall device is simple and flexible.

[0039] When the anti-liquid-back and anti-bubble injection device of the present invention is configured, an independent gas-liquid separation space is set in a limited space, so that bubbles that may be generated by water injection have enough space to escape, thereby reducing the gas content of the fire-fighting liquid finally sucked into the pump.

[0040] Because the liquid-blocking ball will also block the upper liquid filling port in the reverse direction, when the liquid filling is interrupted or completed, there is no need to open and close the liquid filling valve to prevent liquid backflow. It can also further prevent water from shaking and entering the water filling pipe to return liquid, thereby enhancing the anti-liquid backflow effect.

[0041] The dense holes of the liquid injection cage and the liquid shielding balls of the present invention prevent the accumulation of liquid energy in the tank when the vehicle starts or brakes suddenly, that is, they have a wave-proof effect, making the center of gravity of the vehicle more stable and safer.

Claims

1. A fire truck tank with anti-liquid backflow and anti-bubble function, characterized by: The invention comprises a box body (1), a liquid suction pipe (2), and an anti-liquid-back and anti-bubble liquid injection device (3); the liquid suction pipe (2) is arranged at the bottom of the box body (1), and at least one anti-liquid-back and anti-bubble liquid injection device (3) is arranged in the box body (1); The anti-liquid-back and anti-bubble liquid injection device (3) comprises a liquid injection cage (3.2); an upper liquid injection port (3.1) is a tubular structure, one end of which is connected to the outside of the box body (1) and the other end of which extends from the inside of the liquid injection cage (3.2) to the top thereof; a plurality of liquid shielding balls (3.3) are arranged in the liquid injection cage (3.2); the density of the liquid shielding balls (3.3) is less than the density of the water body; one end of the upper liquid injection port (3.1) located at the top faces the liquid shielding balls (3.3); an inspection door (3.4) is installed on a side surface of the liquid injection cage (3.2) in the box body (1); and dense holes are provided on the walls of the liquid injection cage (3.2) and the inspection door (3.4).

2. The anti-liquid-back and anti-bubble fire truck tank according to claim 1, characterized in that: Two anti-liquid-back and anti-bubble injection devices (3) are provided in the box body (1), which are arranged at a relatively spaced distance and close to two adjacent top corners of the box body (1). The liquid suction pipe (2) is located between the two anti-liquid-back and anti-bubble injection devices (3).

3. The anti-liquid-back and anti-bubble fire truck tank according to claim 1, characterized in that: The bottom of the liquid injection cage (3.2) is connected to the inner bottom surface of the box body (1), and a plurality of water holes are provided at intervals on the bottom edge of the liquid injection cage (3.2); the top of the liquid injection cage (3.2) is connected to the inner top surface of the box body (1), and air holes are provided at intervals on the top edge of the liquid injection cage (3.2).

4. The anti-liquid-back and anti-bubble fire truck tank according to claim 3, characterized in that: The water hole and the air vent are both semicircular.

5. The anti-liquid-back and anti-bubble fire truck tank according to claim 1, characterized in that: The paving area of ​​the plurality of liquid-shielding balls (3.3) after being laid out is greater than or equal to the horizontal cross-sectional area of ​​the liquid-injection cage (3.2), so that the liquid-shielding balls (3.3) can be fully spread and float above the liquid in the liquid-injection cage (3.2).

6. The anti-liquid-back and anti-bubble fire truck tank according to claim 1 or 5, characterized in that: The liquid-shielding ball (3.3) is a hollow leather ball, a plastic ball or a rubber ball.

7. The anti-liquid-back and anti-bubble fire truck tank according to claim 1, characterized in that: At least one inspection door (3.4) is installed on the liquid injection cage (3.2) and is detachably connected to the liquid injection cage (3.2).

8. The anti-liquid-back and anti-bubble fire truck tank according to claim 1, characterized in that: The liquid injection cage (3.2) is a rectangular or cylindrical tube structure.

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