Variable cross-section movable fire monitor

Abstract

The utility model discloses a movable fire monitor with a variable cross section, which belongs to the technical field of fire monitors and comprises a middle bent pipe, an upper bent pipe and a lower bent pipe, the upper bent pipe and the lower bent pipe are rotatably connected to two ends of the middle bent pipe, the cross section of the middle bent pipe is elliptical, and a monitor head and a water inlet device are respectively fixed on the upper bent pipe and the lower bent pipe. Motor mounting bases are fixed to the two ends of the middle bent pipe correspondingly, clamping grooves are symmetrically formed in the two sides of the inner wall of the middle bent pipe correspondingly, steering motors are fixed to the side walls of the two motor mounting bases correspondingly, and protrusions making contact with the outer wall of the upper bent pipe and the outer wall of the lower bent pipe correspondingly are arranged on machine shafts of the steering motors. Balls embedded in the clamping grooves are installed on the outer surfaces of the upper bent pipe and the lower bent pipe, the cannon head comprises an inner spraying pipe and an outer spraying pipe connected to the inner spraying pipe in a sliding and sleeving mode, and a push rod motor connected with the outer spraying tank is installed on the outer wall of the inner spraying pipe. According to the variable-section movable fire monitor, the water flow field characteristic can be remarkably improved, and the jetting performance and the jetting angle adjusting convenience are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of fire fighting guns, and particularly relates to a variable cross-section mobile fire fighting gun. Background Art

[0002] Fire is one of the frequent disasters that seriously threaten the survival and development of mankind in the world today. It is a worldwide public hazard, characterized by high occurrence frequency, large spatio-temporal span, and serious losses and hazards. Common causes of fires include the use of open flames, electrical facilities, static electricity, spontaneous combustion of items, lightning strikes, etc. Although the public already has a strong awareness of fire prevention, due to the suddenness and strong destructiveness of fires, disasters caused by fires still occur frequently, seriously threatening people's lives and property safety.

[0003] With the rapid development of China's national economy and science and technology, people's living standards have been continuously improved, and the scale of industrial production has been continuously expanded. The number of large public places such as shopping malls, department stores, hospitals, and sports stadiums is increasing, and the scale of production workshops, chemical storage tanks, enterprise warehouses, etc. is also growing. While these changes have facilitated people's lives and strengthened the national economy, they have also increased fire hazards. Since 2013, the number of fires across the country has been two to three times that of the previous period, with an average of 305,000 fires occurring each year, and the average annual direct property loss reaching as high as 4.06 billion yuan. In addition, according to statistics, fire disasters have also caused thousands of casualties.

[0004] As the main fire fighting equipment, the fire fighting gun is an indispensable technical guarantee in fire fighting. The level of its technology and application is also one of the important indicators to measure a country's ability to resist fires. The main function of the fire fighting gun is to convert the static pressure energy of the fire extinguishing medium into kinetic energy and spray it at a high speed onto the fire or the protected object for fire extinguishing or cooling protection operations. Because of its outstanding characteristics such as large flow rate, long range, high spray height, and strong fire extinguishing ability, it can quickly and efficiently extinguish large-scale and malignant three-dimensional fires in regional and group (equipment or building) areas, and has been widely used in indoor and outdoor key protection places such as ports, ships, oil (gas) tank areas, metallurgy, petrochemical plants, oil (gas) fields, offshore oil platforms, hangars, terminals, large exhibition halls, and sports stadiums in China.

[0005] The patent with the application number 201910748357.0 discloses a mobile fire cannon, whose structure includes a pipe body, a support structure, a hose connection hoop, a control box, a cannon body, and a handwheel. The pipe body is horizontally installed at the upper end of the support structure, and the hose connection hoop is installed at the tail end of the pipe body. The support structure includes a rotation buffer structure, a fixed column, a rotation adjustment structure, a support column, and a height adjustment structure. In the present utility model, a support structure is provided at the lower end of the cannon body. The rotation support column adjusts the rotation adjustment structure, and then under the action of gravity, the insertion plate will compress the return spring to be clamped on the pin rack. The rotation base drives the reinforcement structure to cooperate with the threaded block to descend or ascend, so that the base can better adapt to uneven ground. The rotation nut extends the rod body to make the cone head penetrate into the soil, and it can be better adjusted and adapted at the position where the ground is uneven, and while increasing the flexibility, its stability is enhanced.

[0006] The above technical solution uses multiple adjustable support structures to improve the stability of the fire cannon. However, due to the lack of adjustment of the angle of the fire cannon, the convenience of spraying at different positions during the use of the fire cannon is poor. Summary of the Invention

[0007] (1) Technical problems to be solved

[0008] Aiming at the deficiencies of the prior art, the purpose of the present utility model is to provide a high-performance variable cross-section mobile fire cannon, which aims to solve the problems of poor hydraulic flow field characteristics of the fire cannon and the inability of the spraying performance to meet the requirements of fire fighting in actual combat under the prior art.

[0009] (2) Technical solutions

[0010] To solve the above technical problems, the present utility model provides such a variable cross-section mobile fire cannon, which includes a middle bent pipe and an upper bent pipe and a lower bent pipe rotatably connected to both ends of the middle bent pipe. A cannon head and a water inlet are respectively fixed on the upper bent pipe and the lower bent pipe. Motor mounting seats are fixed at both ends of the middle bent pipe, and card slots are symmetrically formed on both sides of the inner wall of the middle bent pipe. Steering motors are fixed on the side walls of the two motor mounting seats. Protrusions that respectively contact the outer walls of the upper bent pipe and the lower bent pipe are provided on the shafts of the steering motors. Ball bearings embedded in the card slots are installed on the outer surfaces of the upper bent pipe and the lower bent pipe. The cannon head includes an inner spray pipe and an outer spray pipe slidably sleeved on the inner spray pipe. A push rod motor connected to the outer spray tank is installed on the outer wall of the inner spray pipe.

[0011] When using the variable-section mobile fire monitor of this technical solution, slots are provided at both ends of the middle elbow pipe, and a motor mounting seat is fixed on the outer wall of the middle elbow pipe. The upper elbow pipe and the lower elbow pipe are both rotationally clamped in the slots through ball bearings. The control box on the connecting plate controls the motors at both ends of the middle elbow pipe. After the motors are started, the middle elbow pipe and the upper elbow pipe on the lower elbow pipe are driven to rotate by the machine shafts on them, and the direction and angle of the nozzle are adjusted during the rotation process, improving the convenience of adjusting the angle of the fire monitor nozzle. By fixing the first guide vane on the inner wall of the upper elbow pipe and installing the second guide vane and the flow rectifying grid in the inner spray pipe, the first guide vane, the second guide vane and the flow rectifying grid rectify the fire water. At the same time, after the control box starts the push rod motor, it drives the outer spray pipe to slide on the inner spray pipe, and adjusts the distance between the outer spray pipe and the water flow core during the sliding process, thereby adjusting the water outlet cavity on the inner wall of the outer spray pipe, facilitating the adjustment of the direction of the fire water flow.

[0012] Preferably, a pressure gauge is installed at the top of the water inlet device, and a plurality of pipe connectors are provided on the side wall of the water inlet device.

[0013] Furthermore, a hand-held rod is fixed at the top of the middle elbow pipe, and connecting plates are symmetrically fixed on the side wall of the middle elbow pipe. A control box is installed between the two connecting plates.

[0014] Even further, a first connecting nut is rotatably sleeved on the lower elbow pipe, and the first connecting nut is threadedly sleeved on the water inlet device.

[0015] Even further, a second connecting nut is rotatably sleeved on the nozzle, the second connecting nut is threadedly sleeved on the upper elbow pipe, and a first guide vane in an arc structure is fixed on the inner wall of the upper elbow pipe.

[0016] Even further, the bottom end of the middle elbow pipe is fixedly connected with a base, a plurality of legs are rotatably installed in the base, and a bolt for fixing the legs is threadedly inserted into the top end of the base.

[0017] Even further, a second guide vane is fixed on one side of the inner wall of the inner spray pipe, and a flow rectifying grid is installed on the other side of the inner wall of the inner spray pipe.

[0018] Even further, a connecting shaft is embedded and fixed in the second guide vane, and a water flow core is installed at one end of the connecting shaft extending into the outer spray pipe.

[0019] Even further, a spring is sleeved and installed on the connecting shaft, and the spring abuts against the inner wall of the water flow core.

[0020] Even further, the outer spray pipe is slidably clamped on the inner spray pipe, and a water outlet cavity is provided between the outer spray pipe and the water flow core.

[0021] (3) Beneficial effects

[0022] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0023] By changing the inner cavity shapes of the middle elbow pipe and the upper elbow pipe from the traditional conventional circular cross-section to an elliptical cross-section, and at the same time arranging flow guiding vanes in the elliptical inner cavity, the present utility model can significantly improve the hydraulic flow field characteristics inside the fire fighting cannon and enhance the jet performance of the fire fighting cannon; meanwhile, due to the design of the variable cross-section of the middle elbow pipe, the curvature radius of the elbow pipe is increased, the volume of the fire fighting cannon equipment is significantly reduced, and the actual combat performance such as storage, transportation, and deployment of the fire fighting cannon is improved.

[0024] The first flow guiding vane is fixed on the inner wall of the upper elbow pipe, the second flow guiding vane and a rectifying grid are installed in the inner spray pipe. The first flow guiding vane, the second flow guiding vane and the rectifying grid rectify the fire fighting water. At the same time, after the control box starts the push rod motor, it drives the outer spray pipe to slide on the inner spray pipe, and adjusts the distance between the outer spray pipe and the water flow core during the sliding process, thereby adjusting the water outlet cavity on the inner wall of the outer spray pipe, and facilitating the adjustment of the direction of the fire fighting water flow. Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 It is a schematic structural diagram of the present utility model;

[0027] Figure 2 It is a schematic structural diagram of the middle elbow pipe of the present utility model;

[0028] Figure 3 It is a schematic structural diagram of the upper elbow pipe of the present utility model;

[0029] Figure 4 It is a schematic cross-sectional view of the upper elbow pipe of the present utility model;

[0030] Figure 5 It is a schematic structural diagram of the gun head of the present utility model;

[0031] Figure 6 It is a schematic cross-sectional view of the gun head of the present utility model.

[0032] The markings in the attached drawings are as follows: 1, water inlet; 2, pressure gauge; 3, control box; 4, hand lever; 5, middle elbow; 6, gun head; 7, push rod motor; 8, upper elbow; 9, outrigger; 10, base; 11, lower elbow; 12, steering motor; 13, first connecting sleeve; 14, motor mounting seat; 15, card slot; 16, connecting plate; 17, ball; 18, first deflector; 19, inner spray pipe; 20, outer spray pipe; 21, water flow core; 22, spring; 23, connecting shaft; 24, second deflector; 25, rectifying grid; 26, second connecting sleeve. Detailed implementation mode

[0033] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model.

[0034] This detailed implementation mode is a variable cross-section mobile fire gun, and its structural schematic diagram is as shown in Figure 1 , Figure 2 and Figure 3 The variable cross-section mobile fire gun includes a middle elbow 5 and an upper elbow 8 and a lower elbow 11 rotatably connected to both ends of the middle elbow 5. A gun head 6 and a water inlet 1 are respectively fixed on the upper elbow 8 and the lower elbow 11. Motor mounting seats 14 are fixed at both ends of the middle elbow 5, and card slots 15 are symmetrically arranged on both sides of the inner wall of the middle elbow 5. Steering motors 12 are fixed on the side walls of the two motor mounting seats 14. Protrusions in contact with the outer walls of the upper elbow 8 and the lower elbow 11 are provided on the shafts of the steering motors 12. Balls 17 embedded in the card slots 15 are installed on the outer surfaces of the upper elbow 8 and the lower elbow 11. The gun head 6 includes an inner spray pipe 19 and an outer spray pipe 20 slidably sleeved on the inner spray pipe 19. A push rod motor 7 connected to the outer spray tank is installed on the outer wall of the inner spray pipe 19. The bottom end of the middle elbow 5 is fixedly connected to a base 10. A plurality of outriggers 9 are rotatably installed in the base 10, and bolts for fixing the outriggers 9 are threadedly inserted into the top end of the base 10. The upper elbow 8 and the lower elbow 11 are rotatably clamped in the card slots 15 through the balls 17. The control box 3 on the connecting plate 16 controls the motors at both ends of the middle elbow 5. After the motors are started, the middle elbow 5 and the upper elbow 8 on the lower elbow 11 are driven to rotate by their shafts, and the direction and angle of the gun head 6 are adjusted during the rotation process.

[0035] As shown in Figure 4 , Figure 5 and Figure 6As shown in the figure, a pressure gauge 2 is installed at the top of the water inlet device 1, and a plurality of pipe connectors are arranged on the side wall of the water inlet device 1. A handle rod 4 is fixed at the top of the middle elbow pipe 5, and connecting plates 16 are symmetrically fixed on the side wall of the middle elbow pipe 5. A control box 3 is installed between the two connecting plates 16. Bolts are installed on the connecting plates 16 and are threadedly inserted into the control box 3. The control box 3 is electrically connected to the push rod motor 7 and the two steering motors 12 respectively. A first connecting screw sleeve 13 is rotatably sleeved on the lower elbow pipe 11, and the first connecting screw sleeve 13 is threadedly sleeved on the water inlet device 1. A second connecting screw sleeve 26 is rotatably sleeved on the gun head 6, and the second connecting screw sleeve 26 is threadedly sleeved on the upper elbow pipe 8. An arc-shaped first flow guide vane 18 is fixed on the inner wall of the upper elbow pipe 8. After the first connecting screw sleeve 13 and the second connecting screw sleeve 26 are tightened, the water inlet device 1 and the gun head 6 are installed and fixed.

[0036] On one side of the inner wall of the inner spray pipe 19, a second flow guide vane 24 is fixed, and on the other side of the inner wall of the inner spray pipe 19, a rectifying grid 25 is installed. A connecting shaft 23 is fixedly embedded in the second flow guide vane 24. One end of the connecting shaft 23 extending into the outer spray pipe 20 is provided with a water flow core 21. A spring 22 is sleeved on the connecting shaft 23, and the spring 22 abuts against the inner wall of the water flow core 21. The outer spray pipe 20 is slidably clamped on the inner spray pipe 19, and a water outlet cavity is arranged between the outer spray pipe 20 and the water flow core 21. The first flow guide vane 18, the second flow guide vane 24 and the rectifying grid 25 rectify the fire fighting water. At the same time, after the control box 3 starts the push rod motor 7, it drives the outer spray pipe 20 to slide on the inner spray pipe 19, and adjusts the distance between the outer spray pipe 20 and the water flow core 21 during the sliding process, so as to adjust the water outlet cavity on the inner wall of the outer spray pipe 20.

[0037] The schematic structural diagram of the middle elbow pipe 5 of the variable cross-section mobile fire monitor is as Figure 2 shown, and the schematic structural diagram of its upper elbow pipe 8 is as Figure 3 shown, and the schematic sectional view of its upper elbow pipe 8 is as Figure 4 shown, and the schematic structural diagram of its gun head 6 is as Figure 5 shown, and the schematic sectional view of its gun head 6 is as Figure 6 shown.

[0038] Working principle: When using the device of this technical solution, after connecting the fire pipeline connector on the water inlet 1 to the fire pipeline, the fire water flows into the water inlet 1. The pressure gauge 2 at the top of the water inlet 1 monitors the fire water pressure. Both the upper elbow 8 and the lower elbow 11 are rotationally clamped in the card slot 15 through the ball 17. The control box 3 on the connecting plate 16 controls the motors at both ends of the middle elbow 5. After the control box 3 starts the steering motor 12, the shaft on the steering motor 12 drives the middle elbow 5 and the upper elbow 8 on the lower elbow 11 to rotate, and adjusts the direction and angle of the gun head 6 during the rotation. The first guide vane 18, the second guide vane 24, and the rectifying grid 25 rectify the fire water. At the same time, after the control box 3 starts the push rod motor 7, it drives the outer spray pipe 20 to slide on the inner spray pipe 19, and adjusts the distance between the outer spray pipe 20 and the water flow core 21 during the sliding process, thereby adjusting the water outlet cavity on the inner wall of the outer spray pipe 20 to facilitate the adjustment of the direction of the fire water flow.

[0039] All technical features in this embodiment can be freely combined according to actual needs.

[0040] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A variable cross-section mobile fire monitor, which includes a middle bent pipe (5), an upper bent pipe (8) and a lower bent pipe (11) rotatably connected to both ends of the middle bent pipe (5). A nozzle (6) and a water inlet (1) are respectively fixed on the upper bent pipe (8) and the lower bent pipe (11), and it is characterized in that, Both ends of the middle bent pipe (5) are fixedly provided with motor mounting seats (14), and on both sides of the inner wall of the middle bent pipe (5), chutes (15) are symmetrically formed. On the side walls of the two motor mounting seats (14), steering motors (12) are fixedly provided. On the shafts of the steering motors (12), protrusions are provided which are respectively in contact with the outer walls of the upper bent pipe (8) and the lower bent pipe (11). On the outer surfaces of the upper bent pipe (8) and the lower bent pipe (11), balls (17) which are embedded in the chutes (15) are installed. The gun head (6) includes an inner spray pipe (19) and an outer spray pipe (20) which is slidably sleeved on the inner spray pipe (19). On the outer wall of the inner spray pipe (19), a push rod motor (7) connected to the outer spray tank is installed.

2. The variable cross-section mobile fire monitor according to claim 1, characterized in that, At the top of the water inlet device (1), a pressure gauge (2) is installed, and on the side wall of the water inlet device (1), a plurality of pipe connectors are provided.

3. The variable cross-section mobile fire monitor according to claim 2, characterized in that, The inner wall of the flow channel of the middle bent pipe (5) is in an irregular elliptical shape, and at the top of the middle bent pipe, a hand-held rod (4) is fixedly provided. On the side wall of the middle bent pipe (5), connecting plates (16) are symmetrically fixedly provided. Between the two connecting plates (16), a control box (3) is installed.

4. The variable cross-section mobile fire monitor according to claim 1, characterized in that, On the lower bent pipe (11), a first connecting screw sleeve (13) is rotatably sleeved, and the first connecting screw sleeve (13) is threadedly sleeved on the water inlet device (1).

5. A variable cross-section mobile fire monitor according to claim 4, characterized in that, On the gun head (6), a second connecting screw sleeve (26) is rotatably sleeved, and the second connecting screw sleeve (26) is threadedly sleeved on the upper bent pipe (8). On the inner wall of the upper bent pipe (8), a first guide vane (18) in an arc structure is fixedly provided.

6. The variable cross-section mobile fire monitor according to claim 1, wherein, At the bottom end of the middle bent pipe (5), a base (10) is fixedly connected. In the base (10), 4 legs (9) are rotatably installed, and at the top of the base (10), a bolt for fixing the legs (9) is threadedly inserted.

7. The variable cross-section mobile fire monitor according to claim 1, characterized in that On one side of the inner wall of the inner spray pipe (19), a second guide vane (24) is fixedly provided, and on the other side of the inner wall of the inner spray pipe (19), a rectifying grid (25) is installed.

8. The variable cross-section mobile fire monitor according to claim 7, characterized in that In the second guide vane (24), a connecting shaft (23) is embedded and fixed. One end of the connecting shaft (23) extending into the outer spray pipe (20) is provided with a water flow core (21).

9. The variable cross-section mobile fire monitor according to claim 8, wherein On the connecting shaft (23), a spring (22) is sleeved and installed, and the spring (22) abuts against the inner wall of the water flow core (21).

10. A variable cross-section mobile fire monitor according to claim 9, characterized in that, The outer spray pipe (20) is slidably clamped on the inner spray pipe (19), and between the outer spray pipe (20) and the water flow core (21), a water outlet cavity is provided.

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