A medium and low-expansion composite fire-fighting foam monitor with a guide plate

Abstract

The invention relates to a medium- and low-multiple composite fire-fighting foam monitor with a guide plate, comprising a water pipe joint, a flow switcher, a foam cover, a low-multiple foam cylinder, and a medium-multiple foam generating device; the flow switcher comprises a rotating power component, a rotating shaft, a guide ball head, and a spherical sleeve; the spherical sleeve comprises a main interface connected to the water pipe joint and two branch interfaces with set angles; the guide ball head is a blocking component arranged in the spherical sleeve; the rotating power component is fixedly connected to the rotating shaft and can drive the rotating shaft to rotate; a swing rod can drive the guide ball head to swing between two workstations, and after the guide ball head rotates with the rotating shaft, it can respectively block two branch interfaces; one of the two branch interfaces is connected to the low-multiple foam cylinder, and the other is connected to the medium-multiple foam generating device.

Description

Technical Field

[0001] The invention relates to a medium- and low-multiple composite fire-fighting foam monitor with a guide plate, belonging to the technical field of fire-fighting foam monitors. Background Art

[0002] Foam monitor is a firefighting equipment commonly used in the firefighting field. Under a certain pressure, firefighting water and foam liquid are mixed in the foam proportioning device to form a foam mixture of a predetermined proportion, and foam is generated through the nozzle to achieve the effect of fire extinguishing. Foam monitors can be generally divided into low-expansion foam monitors, medium-expansion foam monitors and high-expansion foam generators according to their different foaming ratios.

[0003] The advantage of low-magnification foam cannon is its long range, which allows it to be used for long-distance firefighting. The foaming rate of medium-magnification foam cannon can reach 20-100 times, and it has excellent fire extinguishing performance, but it has a short range and is difficult to effectively extinguish distant fires.

[0004] The main disadvantages of traditional fire-fighting foam cannons used for fire extinguishing are: the foam expansion form is single, the usage scenarios are limited, and it is difficult to take both foaming efficiency and range into consideration at the same time. Summary of the invention

[0005] The purpose of the present invention is to provide a medium and low-multiple composite fire-fighting foam monitor with a guide plate, which adopts a solution that a mixture of foam liquid and water enters the equipment through a nozzle under a pressure supply of not less than 0.8MPa to form low and medium-multiple foam jets. The low-multiple foam jet first hits the burning fire surface to cool it, while the medium-multiple foam jet isolates the surface air. This solves the problem that traditional foam monitors are either restricted by range or fire extinguishing efficiency, and has the advantages of increasing the foam jet distance, the overflow speed of the foam jet on the burning surface, and increasing the fire extinguishing efficiency.

[0006] The present invention adopts the following technical solutions:

[0007] A medium- and low-multiple composite fire-fighting foam monitor with a guide plate, comprising a water pipe joint 1, a flow switcher 2, a low-multiple foam cylinder 3, and a medium-multiple foam generating device; the flow switcher 2 comprises a rotating power component 21, a rotating shaft 22, a guide ball head 23, and a spherical sleeve; the spherical sleeve comprises a main interface connected to the water pipe joint 1 and two branch interfaces with set angles; the guide ball head 23 is a blocking component arranged in the spherical sleeve; the rotating power component 21 is fixedly connected to the rotating shaft 22 and can drive the rotating shaft 22 to rotate; the swing rod can drive the guide ball head 23 to swing between two workstations, and after the guide ball head 23 rotates with the rotating shaft 22, it can respectively block the two branch interfaces; one of the two branch interfaces is connected to the low-multiple foam cylinder 3, and the other is connected to the medium-multiple foam generating device.

[0008] Preferably, the low-multiplicity foam cylinder 3 and the medium-multiplicity foam generating device are arranged side by side.

[0009] Preferably, the low-multiplicity foam cylinder 3 is located inside the medium-multiplicity foam generating device.

[0010] Preferably, the medium-multiple foam generating device comprises a foam nozzle 4 and a foam cover 6 , and the branch interface is connected to the foam cover 6 via the foam nozzle 4 .

[0011] Preferably, an electric push rod device 5 is fixedly provided on the foam cover 6, and the electric push rod device 5 includes a fixing part 51, a triangular fixing part 54, a push rod 53, and a micro motor 52; the triangular fixing part 54 is hinged to the fixing part 51, and the fixing part 51 is fixedly connected to the sleeve of the push rod 53, one end of the push rod 53 is arranged in the sleeve and can move along the sleeve, and the other end is hinged to the triangular fixing part 54, and the micro motor 52 provides power for the push rod 53 to move; the triangular fixing part 54 is also fixedly connected to a guide plate 7, and the guide plate 7 can work at any position between two extreme positions under the drive of the electric push rod device 5: one is to block the front of the foam cover 6, and the other is to shrink to the side of the foam cover 6.

[0012] Preferably, the cross-section of the guide ball head 23 is fan-shaped, and its blocking surface is spherical. A perforated sleeve is installed on the outer side of the rotating shaft 22. The perforated sleeve and the guide ball head 23 are connected by a swing rod, and can drive the blocking component to swing between two workstations.

[0013] Furthermore, the foam nozzles 4 are provided with two in parallel.

[0014] Furthermore, the triangular fixing member has a long side, and the long side is attached to and fixedly connected to the guide plate 7.

[0015] Furthermore, the medium and low-multiple composite fire-fighting foam monitor with a guide plate is fixed or mobile, and the rotating power component 21 is remotely controlled.

[0016] Furthermore, the micro motor 52 is remotely controlled.

[0017] The beneficial effects of the present invention are:

[0018] 1) The modular design decouples the dependence of the fire foam monitor from the base. In actual applications, it can be configured into various deployment forms such as fixed, mobile, electric control, electric control mobile, and hydraulic control, which improves the mobility and mechanization of use.

[0019] 2) By oscillating and mixing foams of different decomposition degrees and different expansion ratios at a certain frequency to produce a medium-expansion foam liquid with a higher foaming ratio and a longer range, the range of traditional medium-expansion foam cannons is greatly improved. Its actual effect is increased by 8-10 times compared with traditional equipment, thereby improving the safety of rescue personnel.

[0020] 3) Through the combination of medium and low-expansion foam, the low-expansion foam is sprayed onto the surface of the object to play a limited cooling function, while the medium-expansion foam jet isolates the surface air, reducing the degree of damage of the medium-expansion foam, increasing the flow rate of the foam on the surface of the flammable liquid, and improving the fire extinguishing efficiency.

[0021] 4) The flow rate of the low-expansion and medium-expansion foam cylinder pipelines is controlled by the flow switch, which can be used for both short-range and long-range firefighting, broadening the limited use scenarios of single foam cannons.

[0022] 5) It solves the problem that traditional foam cannons are limited by their range or fire extinguishing efficiency, and has the advantages of increasing the foam jet distance, the overflow speed of the foam jet on the burning surface, and increasing the fire extinguishing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of a medium and low-multiple composite fire-fighting foam monitor with a guide plate according to the present invention.

[0024] Figure 2 It is an axonometric diagram of a medium- and low-magnification composite fire-fighting foam monitor with a guide plate of the present invention, in two states: the guide plate is not separated and the guide plate is separated.

[0025] Figure 3 It is a structural schematic diagram of an electric push rod device.

[0026] Figure 4 It is a top view of the guide plate in an unseparated state and a separated state.

[0027] Figure 5 This is the overall structure diagram of the flow switch.

[0028] Figure 6a This is a cross-sectional view of the flow switch when the medium foam tube is working.

[0029] Figure 6b It is a cross-sectional view of the working of medium and low foam tubes and the flow switcher.

[0030] Figure 6c It is a cross-sectional view of the low-exponential foam tube working together and the flow switch.

[0031] Figure 7 It is a schematic diagram of one implementation of the guide plate installation position.

[0032] Figure 8 It is a schematic diagram of another implementation of the guide plate installation position.

[0033] Fig. 9 It is a schematic diagram of an implementation method in which a low-expansion foam tube and a foam cover are installed in parallel.

[0034] Fig.10 Schematic diagram of an embodiment in which a low-expansion foam cylinder is installed inside a foam cover.

[0035] In the figure, 1. water pipe joint, 2. flow switch, 3. low-multiplication foam cylinder, 4. foam nozzle, 5. electric push rod, 6. foam cover, 7. guide plate, 21. rotating handle, 22. rotating shaft, 23. guide ball head, 51. fixing part, 52. micro motor, 53. push rod, 54. triangular fixing part. DETAILED DESCRIPTION

[0036] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0037] See also Figure 1-10 , a medium- and low-multiple composite fire-fighting foam cannon with a guide plate, comprising a water pipe joint 1, a flow switcher 2, a low-multiple foam cylinder 3, and a medium-multiple foam generating device; the flow switcher 2 comprises a rotating power component 21, a rotating shaft 22, a guide ball head 23, and a spherical sleeve; the spherical sleeve comprises a main interface connected to the water pipe joint 1 and two branch interfaces with a set angle; the guide ball head 23 is a blocking component arranged in the spherical sleeve; the rotating power component 21 is fixedly connected to the rotating shaft 22, and can drive the rotating shaft 22 to rotate; the swing rod can drive the guide ball head 23 to swing between two workstations, and after the guide ball head 23 rotates with the rotating shaft 22, it can block the two branch interfaces respectively; one of the two branch interfaces is connected to the low-multiple foam cylinder 3, and the other is connected to the medium-multiple foam generating device.

[0038] In this embodiment, referring to Figures 1 and 9, the low-multiple foam cylinder 3 and the medium-multiple foam generating device are arranged side by side.

[0039] In another embodiment, see Fig.10 The low-multiple foam cylinder 3 is located inside the medium-multiple foam generating device.

[0040] See also Figure 1 The medium-multiple foam generating device includes a foam nozzle 4 and a foam cover 6, and the branch interface is connected to the foam cover 6 through the foam nozzle 4.

[0041] See also Figure 3An electric push rod device 5 is fixedly arranged on the foam cover 6, and the electric push rod device 5 includes a fixing part 51, a triangular fixing part 54, a push rod 53, and a micro motor 52; the triangular fixing part 54 is hinged with the fixing part 51, and the fixing part 51 is fixedly connected with the sleeve of the push rod 53. One end of the push rod 53 is arranged in the sleeve and can move along the sleeve, and the other end is hinged with the triangular fixing part 54. The micro motor 52 provides power for the push rod 53 to move; the triangular fixing part 54 is also fixedly connected with a guide plate 7, and the guide plate 7 can work at any position between two extreme positions driven by the electric push rod device 5: one is to block the front part of the foam cover 6, and the other is to shrink to the side of the foam cover 6.

[0042] There are many possible installation positions for the electric push rod device 5 and the guide plate 7. Two examples are given here. Figure 7 The electric push rod device 5 is installed on one side of the foam cover, and the other side is installed on the foam cover. Figure 8 , the electric push rod device 5 is installed on both sides of the foam cover.

[0043] Referring to Fig. 6, the cross section of the guide ball head 23 is fan-shaped, and its blocking surface is spherical. The rotating shaft 22 is sleeved with a perforated sleeve, and the perforated sleeve and the guide ball head 23 are connected by a swing rod, and can drive the guide ball head 23 to swing between two stations.

[0044] See also Figure 1 , the foam nozzles 4 are provided with two in parallel.

[0045] See also Figure 4 The triangular fixing member has a long side, and the long side is in contact with and fixedly connected to the guide plate 7.

[0046] In this embodiment, the medium and low-magnification composite fire-fighting foam monitor with a guide plate is fixed or mobile, and the rotating power component 21 can be remotely controlled. The micro motor 52 can be remotely controlled.

[0047] In specific implementation, the water pipe joint 1 is connected to the external foam mixture supply pipe. The foam liquid and water mixture enters the equipment through the nozzle under a pressure supply of not less than 0.8MPa to form low and medium foam jets. The low-multiple jet first hits the burning fire surface to cool it, while the medium-multiple foam jet isolates the surface air. This solves the problem that the low-multiple foam cannons in traditional foam cannons are either restricted by the range or the fire extinguishing efficiency, and has the advantages of increasing the foam jet distance, the overflow speed of the foam jet on the burning surface, and increasing the fire extinguishing efficiency.

[0048] The foam cannon is composed of pipelines, switches and medium-multiple foam nozzles. Under a pressure of not less than 0.8MPa, foams with different decomposition degrees and different foaming multiples are mixed by oscillating at a certain frequency to produce a medium- and low-multiple foam mixture with high foaming multiples and long range. The low-multiple foam is sprayed onto the surface of the burning object to play a cooling function, and the medium-multiple foam jet isolates the air on the surface, greatly reducing the destructive strength of the medium-multiple foam and improving the fire extinguishing efficiency. Specifically, it can be applied to a variety of foams, including (fluorinated) foam fire extinguishing agents with a concentration of 2% to 6% that can form a film, and foam fire extinguishing agents with a concentration of 1% to 6%. In actual use, through the flow switch, a single low-multiple foam cannon mode, a single medium-multiple foam cannon mode, and a medium- and low-multiple foam cannon mixed mode can be realized.

[0049] During the actual working process, by turning the handle 21, the flow switch inner shaft 22 and the guide ball head 23 are driven to rotate, so as to realize the distribution of the flow in the upper and lower pipes, thereby realizing the low-multiple foam cannon working alone, the medium-multiple foam cannon working alone, and the medium and low-multiple foam cannons working together.

[0050] During the actual working process, the fixing part 51 is fixed to the outer wall of the foam cover 6, symmetrically arranged on both sides of the vertical symmetry plane, and hinged with the motor push rod. The micro motor 52 drives the push rod 53 to perform linear motion. The triangular fixing part 54 is connected to the guide plate 7 (left / right), thereby driving the guide plate to rotate, thereby realizing the separation and merging of the guide plate.

[0051] About the role of the guide plate: The guide plate mainly plays the role of changing the flow direction of the foam. Figure 7 By adjusting the opening and closing degree of the separation guide plate, the foam can be prevented from flying around and the guiding property of the foam can be improved. Figure 8 The foam can be directly adjusted in its emission angle by means of reflection from the guide plate. In the fully combined state, a protective foam curtain (similar to a protective water curtain) is formed by reflection in the gap between the foam cover and the guide plate.

[0052] The present invention retains the traditional simultaneous spraying of medium and low magnifications, while adding the function of separate spraying of low and medium magnifications, and releases and propels the foam covering layer in stages.

[0053] Usage: First use low-multiple foam or medium-low-multiple composite foam with high flow to extinguish the fire; then use medium-multiple foam cannon to push the low-multiple foam covering layer forward, increase the pushing speed, form a foam superposition covering effect, and prevent re-ignition.

[0054] The above are preferred embodiments of the present invention. Those skilled in the art may also make various changes or improvements on this basis. Without departing from the general concept of the present invention, these changes or improvements should all fall within the scope of protection required by the present invention.

Claims

1. A medium and low-multiple composite fire-fighting foam monitor with a guide plate, characterized in that: It comprises a water pipe joint (1), a flow switch (2), a low-multiple foam cylinder (3), and a medium-multiple foam generating device; The flow switch (2) comprises a rotating power component (21), a rotating shaft (22), a flow guide ball head (23), and a spherical sleeve; The spherical sleeve comprises a main interface connected to a water pipe joint (1) and two branch interfaces with set angles; The guide ball head (23) is a blocking component arranged in the spherical sleeve; The rotating power component (21) is fixedly connected to the rotating shaft (22) and can drive the rotating shaft (22) to rotate; a perforated sleeve is arranged on the outer side of the rotating shaft (22); the perforated sleeve and the guide ball head (23) are connected by a swing rod and can drive the blocking component to swing between two workstations; the swing rod can drive the guide ball head (23) to swing between two workstations; after the guide ball head (23) rotates with the rotating shaft (22), it can block the two branch interfaces respectively; one of the two branch interfaces is connected to the low-multiple foam cylinder (3), and the other is connected to the medium-multiple foam generating device; A guide plate (7) is fixedly arranged at the front of the medium-multiplicity foam generating device.

2. The low-middle-multiple composite fire-fighting foam monitor with a guide plate as claimed in claim 1, characterized in that: The low-multiplicity foam cylinder (3) and the medium-multiplicity foam generating device are arranged side by side.

3. The low- to medium-magnification composite fire-fighting foam monitor with a guide plate as claimed in claim 1, characterized in that: The low-multiplicity foam cylinder (3) is located inside the medium-multiplicity foam generating device.

4. The low-multiple composite fire-fighting foam monitor with a guide plate as claimed in claim 1, characterized in that: The medium-multiplier foam generating device comprises a foam nozzle (4) and a foam cover (6), and the branch interface is connected to the foam cover (6) via the foam nozzle (4).

5. The low- to medium-magnification composite fire-fighting foam monitor with a guide plate as claimed in claim 4, characterized in that: An electric push rod device (5) is fixedly arranged on the foam cover (6), and the electric push rod device (5) comprises a fixing member (51), a triangular fixing member (54), a push rod (53), and a micro motor (52); the triangular fixing member (54) is hinged to the fixing member (51), the fixing member (51) is fixedly connected to the sleeve of the push rod (53), one end of the push rod (53) is arranged in the sleeve and can move along the sleeve, and the other end is hinged to the triangular fixing member (54), and the micro motor (52) provides the push rod (53) with power for moving; The triangular fixing member (54) is also fixedly connected to a guide plate (7). Driven by the electric push rod device (5), the guide plate (7) can work at any position between two extreme positions: one is to block the front of the foam cover (6), and the other is to shrink to the side of the foam cover (6).

6. The low-middle-multiple composite fire-fighting foam monitor with a guide plate as claimed in claim 1, characterized in that: The cross section of the flow guide ball head (23) is fan-shaped, and its blocking surface is spherical.

7. The low- to medium-magnification composite fire-fighting foam monitor with a guide plate as claimed in claim 4, characterized in that: The foam nozzles (4) are provided with two connected in parallel.

8. The low- to medium-expansion composite fire-fighting foam monitor with a guide plate as claimed in claim 5, characterized in that: The triangular fixing member has a long side, and the long side is attached to and fixedly connected to the guide plate (7).

9. The low- to medium-expansion composite fire-fighting foam monitor with a guide plate as claimed in claim 5, characterized in that: The medium and low-expansion composite fire-fighting foam monitor with a guide plate is fixed or mobile, and the rotating power component (21) is remotely controlled.

10. The low- to medium-expansion composite fire-fighting foam monitor with a guide plate as claimed in claim 9, characterized in that: The micro motor (52) is remotely controlled.

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