CN118454182A - A fire-fighting water cannon device comprising a pressurized pumping unit - Google Patents

Abstract

A fire-fighting water cannon device including a pressurized pumping unit is mainly composed of a water pump, a water pump driving 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 multi-stage pressurized chamber, so that the speed and pressure of the fluid are significantly increased; it also includes a plurality of guide protrusion structures, along the downstream direction, the guide protrusion structure and the central axis form an angle less than 90° to further guide the spiral motion of the fluid; and/or, the inner wall of the pressurized chamber is formed into an arc shape so that the cross-sectional area of the flow channel first decreases and then increases. Such a design produces a "squeezing" effect on the fluid in which the pressure first increases and then decreases, thereby further increasing the flow rate.

Description

A fire-fighting water cannon device comprising a pressurized pumping unit

Technical Field

The invention relates to a fire-fighting water cannon device, in particular to a fire-fighting water cannon device comprising a pressurized pumping unit.

Background Art

The existing fire-fighting water cannon device is mainly composed 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 the water source, and the water is pumped into the water spraying mechanism. 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 remotely controlled through the control unit.

The range of fire-fighting water cannon devices is very important. Due to the influence of various factors such as the location of fire hydrants, the scope of fire in buildings, and complex terrain, fire-fighting water cannon devices with ultra-long range have wider adaptability and can also ensure the safety of firefighters to the greatest extent. The range of existing fire-fighting water cannon devices still has room for further improvement.

Summary of the invention

The purpose of the present invention is to provide a fire-fighting water cannon device, which has a simple structure and a relatively long range.

In order to achieve the above-mentioned purpose, the fire-fighting water cannon device of the present invention is mainly composed of a water pump, a water pump driving 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 shell, the shell has a fluid inlet, and the shell is limited to have a central axis in the horizontal direction, and the fluid inlet is located below the central axis; a pre-pressurization chamber connected to 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 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 pressurization chamber, the first pressurization chamber is connected to the second chamber and is located downstream of the second chamber, the first pressurization chamber has a fluid inlet one, and the fluid inlet one is located above the central axis; the first pressurization chamber is provided with a first impeller and an impeller drive shaft, wherein the first impeller is mounted on the impeller drive shaft; a motor, wherein the motor drives the impeller drive shaft to rotate; a second pressurizing chamber, wherein the second pressurizing chamber is connected to the first pressurizing chamber and is located downstream of the first pressurizing chamber, wherein the second pressurizing chamber has a second fluid inlet, wherein the second fluid inlet is located below the central axis; a second impeller is arranged in the second pressurizing chamber, wherein the second impeller is mounted on the impeller drive shaft; a third pressurizing chamber, wherein the third pressurizing chamber is connected to the second pressurizing chamber and is located downstream of the second pressurizing chamber, wherein the third pressurizing chamber is truncated cone-shaped, and the flow area of the third pressurizing chamber is smaller as it moves toward the downstream direction; a fourth pressurizing chamber, wherein the fourth pressurizing chamber is connected to the third pressurizing chamber and is located downstream of the third pressurizing chamber; a third impeller is arranged in the fourth pressurizing chamber, wherein the third impeller is mounted on the impeller drive shaft; and the housing also has a fluid outlet, wherein the fluid outlet is connected to the fourth pressurizing chamber.

Preferably, the third pressurizing chamber further comprises a plurality of guide protrusion structures, 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 is less than 90°. Further preferably, the angle ranges from 45° to 60°.

Preferably, the first impeller is a centrifugal impeller; the second impeller is also a centrifugal impeller; and the third impeller is an axial flow impeller or a diagonal flow impeller.

Preferably, it further comprises a flow stabilizer, wherein the flow stabilizer is arranged in the fourth pressurizing chamber and located downstream of the third impeller.

Preferably, the inner wall of the third pressurizing chamber is formed into an arc shape that makes the cross-sectional area of the flow channel decrease first and then increase; the arc shape has an outer 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 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. Further preferably, 0.75d1≤r≤0.85d1.

Compared with the prior art, the present invention can significantly improve the range of the water cannon device. The specific reasons are as follows:

(1) By providing a pressurizing pumping unit including a multi-stage pressurizing chamber, centrifugal force is applied to the fluid, so that the fluid has a tendency to spiral motion;

(2) On this basis, a third pressurizing chamber in the shape of a truncated cone is constructed, and the flow area of the third pressurizing chamber becomes smaller as it moves toward the downstream direction, so that the velocity and pressure of the fluid are significantly increased;

(3) Advantageously, the third pressurizing chamber may include a plurality of guiding protrusion structures, wherein 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, and in particular, when the angle ranges from 45° to 60°, the best guiding effect is achieved;

(4) In addition, advantageously, the inner wall of the third pressurizing chamber is formed into an arc shape so that the cross-sectional area of the flow channel first decreases and then increases. Such a design produces a "squeezing" effect on the fluid in which the pressure first increases and then decreases, thereby further increasing the flow rate; the arc shape has an outer 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 flow channel of the third pressurizing chamber at the smallest cross-sectional diameter is d3, which satisfies the following dimensional relationship: d1＞r＞d2＞d3; in particular, when 0.75d1≤r≤0.85d1, the flow rate improvement effect is most obvious, with an improvement of more than 30%.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the overall composition of a fire-fighting water cannon device;

FIG2 is a schematic diagram of the structure of the water spray mechanism of a fire-fighting water cannon device;

FIG. 3 is a schematic diagram of a second embodiment of the water spray mechanism structure of a fire-fighting water cannon device.

DETAILED DESCRIPTION

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

As shown in Figure 1, the fire-fighting water cannon device is mainly composed of a water pump 2, a water pump driving mechanism 3, a water spraying mechanism 4, and a control unit 5; the water pump driving mechanism drives the water pump to draw water from a water source 1, and the water is pumped into the water spraying mechanism. 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 remotely controlled by the control unit. On this basis, the present invention improves the structure of the water spraying mechanism, so that the range of the water cannon device is significantly increased.

As shown in Figure 2, the water spray mechanism has a pressurized pumping unit, which includes: a shell, the shell has a fluid inlet 4-1, the shell is limited 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 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, and 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 pressurized chamber 4-3, the first pressurized chamber is connected to the second chamber and is located downstream of the second chamber, the first pressurized chamber has a fluid inlet one, and the fluid inlet one is located above the central axis; a first impeller L1 and an impeller drive shaft S are provided in the first pressurized chamber, and the first impeller is installed on the impeller On the driving shaft; the motor drives the impeller driving shaft to rotate; the second pressurizing chamber 4-4, the second pressurizing chamber is connected with the first pressurizing chamber and is located downstream of the first pressurizing chamber, the second pressurizing chamber has a fluid inlet 2, and the fluid inlet 2 is located below the central axis; the second pressurizing chamber is provided with a second impeller L2, and the second impeller is installed on the impeller driving shaft; the third pressurizing chamber 4-5, the third pressurizing chamber is connected with the second pressurizing chamber and is located downstream of the second pressurizing chamber, the third pressurizing chamber is truncated, and the flow area of the third pressurizing chamber is smaller as it goes downstream; the fourth pressurizing chamber 4-6, the fourth pressurizing chamber is connected with the third pressurizing chamber and is located downstream of the third pressurizing chamber; the fourth pressurizing chamber is provided with a third impeller L3, and the third impeller is installed on the impeller driving shaft; the housing also has a fluid outlet 4-7, and the fluid outlet is connected with the fourth pressurizing chamber. By setting up multiple-stage pressurizing chambers, centrifugal force is applied to the fluid, so that it has a tendency to spiral motion. On this basis, a third pressurizing chamber in a truncated cone shape is constructed, and the flow area of the third pressurizing chamber becomes smaller as it goes downstream, so that the velocity and pressure of the fluid are significantly increased.

According to a preferred embodiment of the present invention, the third pressurization chamber further includes a plurality of guide protrusion structures W, which protrude from the inner wall of the third pressurization chamber. Along the downstream direction, the guide protrusion structure forms 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 angle ranges from 45° to 60°, it has the best guiding effect.

According to a preferred embodiment of the present invention, the first impeller is a centrifugal impeller; the second impeller is also a centrifugal impeller; and the third impeller is an axial flow impeller or a diagonal flow impeller.

According to a preferred embodiment of the present invention, a flow stabilizer is further included, which is arranged in the fourth pressurizing chamber and downstream of the third impeller. The design of the flow stabilizer can effectively eliminate vortexes and ensure that the fluid has a stable speed and pressure.

According to a preferred embodiment of the present invention, as shown in FIG3 , the inner wall of the third pressurizing chamber is formed into an arc shape in which the cross-sectional area of the flow channel first decreases and then increases. Such a design produces a "squeezing" effect on the fluid in which the pressure first increases and then decreases, thereby further increasing the flow rate; 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 point is d3, which satisfies the following dimensional relationship: d1＞r＞d2＞d3; after repeated tests and verification, when 0.75d1≤r≤0.85d1, the flow rate improvement effect is most obvious, and the improvement exceeds 30%.

In addition, it should be noted that the structures shown in Figures 2 and 3 can be used alone or in combination. For example, the inner wall of the third pressurized chamber is formed into an arc shape in which the cross-sectional area of the flow channel first decreases and then increases, and at the same time includes a plurality of guide protrusion structures, so as to obtain a higher flow rate and a longer range.

Although the preferred embodiment of the present invention has been described, the changes and modifications that can be made by those skilled in the art within the scope of creativity are not limited to the preferred embodiment described above. Therefore, the protection scope of the claims is interpreted as including the preferred embodiment and all changes and modifications within the scope of creativity.

Claims (10)

1. A fire-fighting water monitor device including a pressurized pumping unit, mainly consisting of 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 spraying 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 arranged 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 connected to the second pressurizing chamber and being located downstream of the second pressurizing chamber, the third pressurizing chamber being in a truncated cone shape, and the flow area of the third pressurizing chamber becoming smaller as it moves toward the downstream direction; 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 communicated with the fourth pressurized chamber. 2. According to the fire-fighting water cannon device according to claim 1, the third pressurization chamber further includes a plurality of guide protrusion structures (W), and the guide protrusion structures protrude from the inner wall of the third pressurization chamber. Along the downstream direction, the guide protrusion structures form an angle with the central axis, and the angle is less than 90°. 3. According to the fire-fighting water monitor device according to claim 2, the angle ranges from 45° to 60°. 4. According to the fire-fighting water monitor device as described in claim 3, the first impeller is a centrifugal impeller. 5. According to the fire-fighting water monitor device as described in claim 4, the second impeller is a centrifugal impeller. 6. According to the fire-fighting water monitor device according to claim 5, the third impeller is an axial flow impeller or an oblique flow impeller. 7. The fire-fighting water monitor device according to claim 6, further comprising a flow stabilizer (F), which is arranged in the fourth pressurizing chamber and located downstream of the third impeller. 8. According to the fire-fighting water monitor device of claim 7, the inner wall of the third pressurizing chamber is formed into an arc shape so that the cross-sectional area of the flow channel first decreases and then increases. 9. According to the fire-fighting water cannon device according to claim 8, the arc shape has an outer radius of r, the cross-sectional diameter of the flow channel inlet of the third pressurization chamber is d1, the cross-sectional diameter of the flow channel outlet of the third pressurization chamber is d2, and the cross-sectional diameter of the flow channel of the third pressurization chamber at the smallest cross-sectional diameter is d3, then the following dimensional relationship is satisfied: d1＞r＞d2＞d3. 10. The fire-fighting water monitor device according to claim 9, 0.75d1≤r≤0.85d1.