A fire water cannon device including a pressurized pumping unit

Abstract

A fire water cannon device including a pressurized pumping unit mainly consists of a water pump, a water pump driving mechanism, a water spraying mechanism, and a control unit; among them, the water spraying mechanism has a pressurized pumping unit, and the pressurized pumping unit includes multiple pressurizing chambers, enabling a significant increase in the speed and pressure of the fluid; it also includes several guiding convex structures, along the downstream direction, the guiding convex structures form an angle with the central axis, and this angle is less than 90° to further guide the spiral movement of the fluid; and / or, the inner wall of the pressurizing chamber is formed into an arc shape that makes the cross-sectional area of the flow channel first decrease and then increase, and such a design generates a "squeezing" effect on the fluid where the pressure first increases and then decreases, thereby further increasing the flow rate.

Description

Technical Field

[0001] The present invention relates to a fire water cannon device, and particularly to a fire water cannon device including a pressurized pumping unit. Background Art

[0002] Existing fire water cannon devices mainly consist of a water pump, a water pump driving mechanism, a water spraying mechanism, and a control unit. The water pump driving mechanism drives the water pump to draw water from a water source. The water is pumped into the water spraying mechanism and, after being pressurized by the water spraying mechanism, high-pressure water is sprayed onto the object to be extinguished. The entire device can achieve automatic remote control through the control unit.

[0003] The range of a fire water cannon device is very important. Due to the influence of various factors such as the location of fire hydrants, the scope of building fires, and complex terrains, a fire water cannon device with an ultra-long range has a wider adaptability and can also ensure the safety of firefighters to the greatest extent. There is still room for further improvement in the range of existing fire water cannon devices. Summary of the Invention

[0004] The object of the present invention is to provide a fire water cannon device, which has a simple structure and a relatively long range at the same time.

[0005] To achieve the above object, the fire water cannon device of the present invention mainly consists of a water pump, a water pump drive mechanism, a water spraying mechanism, and a control unit; wherein, the water spraying mechanism has a pressurized pumping unit, and the pressurized pumping unit includes: a housing, the housing has a fluid inlet, and in the horizontal direction, the housing is defined to have a central axis, and the fluid inlet is located below the central axis; a pre-pressurization chamber communicated with the fluid inlet, the pre-pressurization chamber includes a first chamber and a second chamber, the first chamber is located below the central axis, the second chamber is located above the central axis, the first chamber is communicated with the fluid inlet, the second chamber is communicated with the first chamber, the fluid first fills the first chamber and then flows from the first chamber into the second chamber; a first pressurization chamber, the first pressurization chamber is communicated with the second chamber and is located downstream of the second chamber, the first pressurization chamber has a first fluid inlet, and the first fluid inlet is located above the central axis; a first impeller and an impeller drive shaft are arranged in the first pressurization chamber, and the first impeller is installed on the impeller drive shaft; a motor, the motor drives the impeller drive shaft to rotate; a second pressurization chamber, the second pressurization chamber is communicated with the first pressurization chamber and is located downstream of the first pressurization chamber, the second pressurization chamber has a second fluid inlet, and the second fluid inlet is located below the central axis; a second impeller is arranged in the second pressurization chamber, and the second impeller is installed on the impeller drive shaft; a third pressurization chamber, the third pressurization chamber is communicated with the second pressurization chamber and is located downstream of the second pressurization chamber, the third pressurization chamber is in a frustum shape, and the flow area of the third pressurization chamber becomes smaller in the downstream direction; a fourth pressurization chamber, the fourth pressurization chamber is communicated with the third pressurization chamber and is located downstream of the third pressurization chamber; a third impeller is arranged in the fourth pressurization chamber, and the third impeller is installed on the impeller drive shaft; the housing also has a fluid outlet, and the fluid outlet is communicated with the fourth pressurization chamber.

[0006] Preferably, the third pressurization chamber further includes a plurality of guiding protrusion structures, the guiding protrusion structures protrude from the inner wall of the third pressurization chamber, and in the downstream direction, the guiding protrusion structures form an angle with the central axis, and the angle is less than 90°. Further preferably, the range of the angle is 45° to 60°.

[0007] Preferably, the first impeller is a centrifugal impeller; the second impeller is also a centrifugal impeller; the third impeller is an axial flow impeller or a mixed flow impeller.

[0008] Preferably, it further includes a flow stabilizer, and the flow stabilizer is arranged in the fourth pressurization chamber and is located downstream of the third impeller.

[0009] Preferably, the inner wall of the third pressurizing chamber is formed into an arc shape that reduces and then increases the cross-sectional area of the flow channel; the arc shape has an outer peripheral radius of size r, the cross-sectional diameter of the flow channel inlet of the third pressurizing chamber is d1, the cross-sectional diameter of the flow channel outlet of the third pressurizing chamber is d2, and the cross-sectional diameter of the minimum cross-sectional diameter of the flow channel of the third pressurizing chamber is d3, then the following dimensional relationship is satisfied: d1 > r > d2 > d3. Further preferably, 0.75d1 ≤ r ≤ 0.85d1.

[0010] Compared with the prior art, the present invention can significantly improve the range of the water cannon device, and the specific reasons are as follows:

[0011] (1) By providing a pressurizing pump unit, which includes multiple pressurizing chambers, centrifugal force is applied to the fluid to make it tend to have a spiral motion;

[0012] (2) On this basis, a third pressurizing chamber in the shape of a frustum of a cone is constructed, and the flow-through area of the third pressurizing chamber becomes smaller in the downstream direction, so that the velocity and pressure of the fluid increase significantly;

[0013] (3) Advantageously, the third pressurizing chamber can also include several guiding protrusion structures. Along the downstream direction, the guiding protrusion structures form an angle with the central axis, and the angle is less than 90° to further guide the spiral motion of the fluid. Especially when the range of the angle is 45° to 60°, the best guiding effect is achieved;

[0014] (4) In addition, advantageously, the inner wall of the third pressurizing chamber is formed into an arc shape that reduces and then increases the cross-sectional area of the flow channel. Such a design produces a "squeezing" effect on the fluid where the pressure increases and then decreases, thereby further increasing the flow velocity; the arc shape has an outer peripheral radius of size r, the cross-sectional diameter of the flow channel inlet of the third pressurizing chamber is d1, the cross-sectional diameter of the flow channel outlet of the third pressurizing chamber is d2, and the cross-sectional diameter of the minimum cross-sectional diameter of the flow channel of the third pressurizing chamber is d3, then the following dimensional relationship is satisfied: d1 > r > d2 > d3; in particular, when 0.75d1 ≤ r ≤ 0.85d1, the flow velocity improvement effect is the most obvious, and the improvement amplitude exceeds 30%. Description of the Drawings

[0015] Figure 1 is a schematic diagram of the overall composition of the fire fighting water cannon device;

[0016] Figure 2 is a schematic diagram of the structure of the water spraying mechanism of the fire fighting water cannon device;

[0017] Figure 3 is a schematic diagram of the second embodiment of the structure of the water spraying mechanism of the fire fighting water cannon device. Detailed Embodiments

[0018] The present invention will be further described below in conjunction with the accompanying drawings:

[0019] As Figure 1 shown, the fire water cannon device mainly consists of a water pump 2, a water pump drive mechanism 3, a water spraying mechanism 4, and a control unit 5; the water pump drive mechanism drives the water pump to draw water from the water source 1, the water is pumped into the water spraying mechanism, and after being pressurized by the water spraying mechanism, the high-pressure water is sprayed onto the object to be extinguished. The entire device can be automatically and remotely controlled through the control unit. On this basis, the present invention has improved the structure of the water spraying mechanism, significantly increasing the range of the water cannon device.

[0020] As Figure 2 shown, the water spraying mechanism has a pressurizing pumping unit, and the pressurizing pumping unit includes: a housing, the housing has a fluid inlet 4-1, and in the horizontal direction, the housing is defined to have a central axis, and the fluid inlet is located below the central axis; a pre-pressurizing chamber 4-2 connected to the fluid inlet, the pre-pressurizing chamber includes a first chamber 4-2a and a second chamber 4-2b, the first chamber is located below the central axis, the second chamber is located above the central axis, the first chamber is connected to the fluid inlet, the second chamber is connected to the first chamber, the fluid first fills the first chamber, and then flows from the first chamber into the second chamber; a first pressurizing chamber 4-3, the first pressurizing chamber is connected to the second chamber and is located downstream of the second chamber, the first pressurizing chamber has a first fluid inlet, and the first fluid inlet is located above the central axis; a first impeller L1 and an impeller drive shaft S are provided in the first pressurizing chamber, and the first impeller is installed on the impeller drive shaft; a motor, the motor drives the impeller drive shaft to rotate; a second pressurizing chamber 4-4, the second pressurizing chamber is connected to the first pressurizing chamber and is located downstream of the first pressurizing chamber, the second pressurizing chamber has a second fluid inlet, and the second fluid inlet is located below the central axis; a second impeller L2 is provided in the second pressurizing chamber, and the second impeller is installed on the impeller drive shaft; a third pressurizing chamber 4-5, the third pressurizing chamber is connected to the second pressurizing chamber and is located downstream of the second pressurizing chamber, the third pressurizing chamber is frustum-shaped, and the flow-through area of the third pressurizing chamber becomes smaller in the downstream direction; a fourth pressurizing chamber 4-6, the fourth pressurizing chamber is connected to the third pressurizing chamber and is located downstream of the third pressurizing chamber; a third impeller L3 is provided in the fourth pressurizing chamber, and the third impeller is installed on the impeller drive shaft; the housing also has a fluid outlet 4-7, and the fluid outlet is connected to the fourth pressurizing chamber. By setting multiple pressurizing chambers, centrifugal force is applied to the fluid, making it tend to have a spiral motion. On this basis, a frustum-shaped third pressurizing chamber is constructed, and the flow-through area of the third pressurizing chamber becomes smaller in the downstream direction, significantly increasing the speed and pressure of the fluid.

[0021] According to a preferred embodiment of the present invention, the third pressurizing chamber further includes a plurality of guiding convex structures W, which protrude from the inner wall of the third pressurizing chamber and form an angle with the central axis along the downstream direction, and the angle is less than 90° to further guide the spiral movement of the fluid. Especially when the range of the angle is 45° to 60°, the best guiding effect is achieved.

[0022] According to a preferred embodiment of the present invention, the first impeller is a centrifugal impeller; the second impeller is also a centrifugal impeller; the third impeller is an axial flow impeller or a mixed flow impeller.

[0023] According to a preferred embodiment of the present invention, it further includes a flow stabilizer, which is arranged in the fourth pressurizing chamber and downstream of the third impeller. The design of the flow stabilizer can effectively eliminate eddy currents and ensure that the fluid has stable velocity and pressure.

[0024] According to a preferred embodiment of the present invention, as Figure 3 shown, the inner wall of the third pressurizing chamber is formed into an arc shape that makes the cross-sectional area of the flow channel first decrease and then increase. Such a design produces a "squeezing" effect on the fluid, where the pressure first increases and then decreases, thereby further increasing the flow velocity; the arc shape has an outer peripheral radius of r, the cross-sectional diameter of the inlet of the flow channel of the third pressurizing chamber is d1, the cross-sectional diameter of the outlet of the flow channel of the third pressurizing chamber is d2, and the cross-sectional diameter of the smallest cross-section of the flow channel of the third pressurizing chamber is d3. Then, the following dimensional relationship is satisfied: d1 > r > d2 > d3; through repeated experimental verification, when 0.75d1 ≤ r ≤ 0.85d1, the flow velocity increase effect is the most obvious, and the increase amplitude exceeds 30%.

[0025] In addition, it should be noted that Figure 2 and Figure 3 the structures shown can be used alone or in combination. For example, the inner wall of the third pressurizing chamber is formed into an arc shape that makes the cross-sectional area of the flow channel first decrease and then increase, and at the same time includes a plurality of guiding convex structures, so as to obtain a higher flow velocity and a farther range.

[0026] Although the preferred embodiments of the present invention have been described, the changes and modifications that those skilled in the art can make within the scope of creativity are not limited to the above preferred embodiments. Therefore, the protection scope of the claims is interpreted to include the preferred embodiments and all changes and modifications within the scope of creativity.

Claims

1. A fire-fighting water cannon device including a pressurized pumping unit, comprising a water pump (2), a water pump driving mechanism (3), a water spraying mechanism (4), and a control unit (5); characterized in that: The water spray mechanism has a pressurized pumping unit, and the pressurized pumping unit includes: A housing, wherein the housing has a fluid inlet (4-1), and the housing is defined to have a central axis in the horizontal direction, and the fluid inlet is located below the central axis; a pre-pressurization chamber (4-2) connected to the fluid inlet, the pre-pressurization chamber comprising a first chamber (4-2a) and a second chamber (4-2b), the first chamber being located below the central axis, the second chamber being located above the central axis, the first chamber being connected to the fluid inlet, the second chamber being connected to the first chamber, the fluid first filling the first chamber, and then flowing from the first chamber into the second chamber; a first pressurizing chamber (4-3), the first pressurizing chamber being connected to the second chamber and being located downstream of the second chamber, the first pressurizing chamber having a fluid inlet 1, the fluid inlet 1 being located above the central axis; a first impeller (L1) and an impeller drive shaft (S) being provided in the first pressurizing chamber, the first impeller being mounted on the impeller drive shaft; A motor, wherein the motor drives the impeller drive shaft to rotate; a second pressurizing chamber (4-4), the second pressurizing chamber being in communication with the first pressurizing chamber and being located downstream of the first pressurizing chamber, the second pressurizing chamber having a second fluid inlet, the second fluid inlet being located below the central axis; a second impeller (L2) being arranged in the second pressurizing chamber, the second impeller being mounted on the impeller drive shaft; a third pressurizing chamber (4-5), the third pressurizing chamber being in communication with the second pressurizing chamber and being located downstream of the second pressurizing chamber; a fourth pressurizing chamber (4-6), the fourth pressurizing chamber being in communication with the third pressurizing chamber and being located downstream of the third pressurizing chamber; a third impeller (L3) being arranged in the fourth pressurizing chamber, the third impeller being mounted on the impeller drive shaft; The housing also has a fluid outlet (4-7), which is in communication with the fourth pressurizing chamber; The third pressurizing chamber further comprises a plurality of guide protrusion structures (W), the guide protrusion structures protrude from the inner wall of the third pressurizing chamber, and along the downstream direction, the guide protrusion structures form an angle with the central axis, and the angle ranges from 45° to 60°; The first impeller is a centrifugal impeller; The second impeller is a centrifugal impeller; The third impeller is an axial flow impeller or a diagonal flow impeller; It also includes a flow stabilizer (F), which is arranged in the fourth pressurizing chamber and located downstream of the third impeller; The inner wall of the third pressurizing chamber is formed into an arc shape so that the cross-sectional area of ​​the flow channel decreases first and then increases; The arc shape has an outer radius of r, the cross-sectional diameter of the flow channel inlet of the third pressurizing chamber is d1, the cross-sectional diameter of the flow channel outlet of the third pressurizing chamber is d2, and the cross-sectional diameter of the flow channel of the third pressurizing chamber at the smallest cross-sectional diameter is d3, then the following dimensional relationship is satisfied: d1>r>d2>d3; 0.75d1≤r≤0.85d1.

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