Anti-liquid-return and anti-bubble fire fighting truck tank body

Abstract

The invention discloses an anti-liquid-return and anti-bubble fire fighting truck tank body which comprises a tank body, a liquid suction pipe and an anti-liquid-return and anti-bubble liquid injection device. The liquid suction pipe is arranged at the bottom of the box body, and at least one anti-liquid-return and anti-bubble liquid injection device is arranged in the box body; the anti-liquid-return and anti-bubble liquid injection device comprises a liquid injection cage, an upper liquid injection opening is of a tubular structure, one end of the upper liquid injection opening is communicated with the outer side of the box body, the other end of the upper liquid injection opening extends to the top of the liquid injection cage from the interior of the liquid injection cage, a plurality of liquid covering balls are arranged in the liquid injection cage, and the density of the liquid covering balls is smaller than that of water. The access door is installed on one side face of the liquid injection cage in the box body, and dense holes are formed in the wall face of the liquid injection cage and the wall face of the access door. An independent gas-liquid separation space is arranged in a limited space, so that bubbles possibly generated by water injection have enough space to escape, and the gas content of water finally sucked into the pump is reduced. Overall water flow fluctuation in the tank is reduced, and fire-fighting water absorption performance is stabilized.

Description

Technical Field

[0001] The invention relates to a fire truck tank body, in particular to an anti-liquid-back and anti-bubble fire truck tank body. Background Art

[0002] As a key component of the fire fighting system, the fire truck tank plays a vital role in fire fighting operations. During fire fighting operations, the continuous combat capability of relay operations is the key guarantee for effectively extinguishing the fire.

[0003] At present, the conventional liquid tank structure of a fire truck generally includes a box body, a liquid suction pipe, and is equipped with a downward liquid injection pipe group or an upward liquid injection pipe group. For the liquid tank of a fire truck equipped with a downward liquid injection pipe group, since it is not anti-liquid backflow, 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. And when injecting liquid, especially when the liquid level is low, the water flow in the tank is prone to impact, blooming, splashing, falling back, etc., generating a large number of bubbles sucked into the pump, causing the pump to vibrate and make noise, and the head and flow rate are reduced, so that the fire pump of the front vehicle cannot work stably, that is, it cannot be used for relay water supply and continuous combat.

[0004] For the liquid tank of a fire truck equipped with a downward-turned liquid injection pipe group, the water injection pipe turns up to the top and then injects liquid downward. Although this can temporarily prevent liquid reflux, if the water body shakes when the liquid level is high after the injection, the liquid will still rush into the injection pipe and return. When the relay operation is in the liquid injection condition, the injection water flow will impact the liquid level in the tank, and a large number of bubbles will also be sucked into the pump, causing the pump to vibrate and make noise, reduce the head and flow rate, and even cause the risk of mechanical damage, suspending the firefighting operation, that is, it is not suitable for relay water supply continuous combat.

[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 space 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-liquid backflow and anti-bubble liquid injection device includes a liquid injection cage, an 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 the top thereof. 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. One end of the upper liquid injection port is located at the top and faces the liquid shielding balls. The inspection door is installed on one side surface of the liquid injection cage in the box body, and dense holes are arranged on the wall surfaces of the liquid injection cage and the inspection door.

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

[0012] Furthermore, the paving 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-covering ball is a hollow leather ball, a plastic ball, or a rubber ball.

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

[0015] Optimally, the 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 the bubbles that may be generated by water injection have enough space to escape, so that the gas content of the water finally sucked into the pump is reduced.

[0018] 2. A liquid injection cage is arranged below the top water inlet of the present invention, and dense holes are arranged 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, and 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. The water injection of the present invention is top injection, and the lower injection cage is filled with liquid shielding balls, the density of which is lower than that of the water body, and the balls float and fill the liquid surface of the injection cage. During the injection, the liquid shielding balls absorb the energy of the first wave of injection, reducing the water impact. The water with reduced energy flows into the water body of the injection cage again, reducing the amount of bubbles generated, and further separating the gas and liquid.

[0020] 4. Because the liquid-blocking ball will also block the upper liquid injection port in the reverse direction, when the liquid injection is interrupted or ended, there is no need to open and close the liquid injection valve to prevent liquid backflow. It can also further prevent the 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 is started or braked suddenly, that is, the wave-proof effect, making 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 It is a structural schematic diagram of a liquid injection device to prevent liquid backflow and bubble;

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

[0026] Figure 5 It is a structural schematic diagram of the upper liquid injection port;

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

[0028] Figure 7 is a schematic diagram of the structure of the liquid-shielding ball;

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

[0030] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments 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 that prevents liquid backflow and bubbles, such as Figures 1 to 8 As shown, it includes a box body 1, a liquid suction tube 2, and an anti-liquid backflow and anti-bubble liquid injection device 3.

[0032] The pipette 2 is arranged at the bottom of the box body 1, and at least one anti-liquid backflow and anti-bubble liquid injection device 3 is provided in the box body 1. In the present embodiment, two anti-liquid 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, and the pipette 2 is located between the two anti-liquid backflow and anti-bubble liquid injection devices 3.

[0033] 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 extends from the inside of the liquid injection cage 3.2 to its top, and a plurality of liquid shielding balls 3.3 are arranged in the liquid injection cage 3.2, and 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 paving area of ​​multiple liquid shielding balls 3.3 after being laid flat 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 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 the density is less than the fire-fighting liquid, it floats and fills 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 possible debris inside and replacement of the liquid shielding balls 3.3. The wall surfaces 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, and 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 performs water injection from above, and the lower liquid injection cage 3.2 is filled with liquid shielding balls 3.3, the density of which is less than that of the water body, and the balls float and fill the liquid surface of the liquid injection cage. During the liquid injection, the liquid shielding balls 3.3 absorb the energy of the first wave of liquid injection, reducing the water impact. The water with reduced energy flows into the water body of the liquid injection cage 3.2 again, reducing the amount of bubbles generated, and further separating the gas and liquid.

[0037] The liquid injection cage 3.2 is a rectangular or cylindrical tube-shaped structure, and an independent gas-liquid separation space is isolated by setting the liquid injection cage 3.2. 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 arranged 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 arranged at intervals on the top edge of the liquid injection cage 3.2. Both the water holes and the air holes are semicircular. The water holes prevent water accumulation, and the air holes prevent air blocking.

[0038] The present invention greatly improves the liquid injection and liquid 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, so that the gas content of the fire-fighting liquid finally sucked into the pump is reduced.

[0040] Because the liquid-blocking ball will also block the upper liquid injection port in the reverse direction, when the liquid injection is interrupted or ended, there is no need to open and close the liquid 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.

[0041] The dense holes of the liquid injection cage and the liquid shielding balls of the present invention can prevent the accumulation of liquid energy in the tank when the vehicle is started or braked suddenly, that is, prevent waves, making the center of gravity of the vehicle more stable and safer.

Claims

1. A fire truck tank body with anti-liquid backflow and anti-bubble function, characterized in that: The invention comprises a box body (1), a liquid suction pipe (2), and a liquid backflow prevention and bubble prevention liquid injection device (3); the liquid suction pipe (2) is arranged at the bottom of the box body (1), and at least one liquid backflow prevention and bubble prevention 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 a 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 water; 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 one side surface of the liquid injection cage (3.2) in the box body (1); and dense holes are arranged on the wall surfaces 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 interval and respectively close to two adjacent top corners of the box body (1), and 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 arranged 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 ventilation holes are arranged 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: Both the water hole and the air hole are 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 flat is greater than or equal to the horizontal cross-sectional area of ​​the liquid-injecting cage (3.2), so that the liquid-shielding balls (3.3) can be spread fully and float above the liquid in the liquid-injecting 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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