A multi-jet self-conversion structure for fire monitors

Abstract

This utility model discloses a multi-jet self-converting structure for fire monitors, including a monitor head, a barrel disposed outside the monitor head outlet, and a steering structure connecting the barrel and the outside of the monitor head. This allows the barrel to be coaxially aligned with the monitor head outlet under the steering structure's influence, or rotated to a position offset from the monitor head outlet. This utility model achieves barrel folding / unfolding via a linkage mechanism, synchronously linking the monitor head jet modes, enabling rapid and seamless switching between multiple modes. When the barrel is folded, the monitor head's DC nozzle alone can switch between DC water jetting, misting water jetting, and strong foam release, used for cooling, explosion suppression, and initial aggressive fire suppression. When the barrel is unfolded, the venturi-diameter section of the inner cylinder sprays low-expansion foam for foam coverage fire suppression. When the monitor head performs a burst jet, the jet exits from the annular area between the inner and outer cylinders, forming medium-expansion foam through two layers of mesh, used for foam overlay coverage and direct extinguishing of low-calorific-value liquid fires.

Description

Technical Field

[0001] This utility model relates to the field of fire monitor technology, specifically to a multi-jet self-conversion structure for fire monitors. Background Technology

[0002] Traditional fire monitors require disassembly and replacement of different barrels to switch between water, foam, and foaming modes, such as water jetting, low-expansion slow-release foam, and medium-expansion slow-release foam. This operation is time-consuming and delays fire suppression. Furthermore, current technology struggles to achieve rapid switching between water jet, low-expansion foam, and medium-expansion foam modes on a single monitor head, necessitating the use of multiple specialized barrels. Switching between different jet modes requires disassembly and reassembly, resulting in numerous pieces of equipment, complex operation, and, when using a fire truck, the boom must be retracted to the ground for replacement, further wasting time and effort, delaying fire suppression, and increasing safety risks for frontline personnel. Additional foaming structures are typically fixed, preventing the medium-expansion foam tank from swinging with the monitor head and significantly increasing its weight, making pitch / rotation difficult. Additionally, the barrel cannot be folded when not in operation, affecting storage, transportation, and use in confined spaces. Therefore, designing a multi-jet self-converting structure for fire monitors is a pressing issue for engineers in this field. Utility Model Content

[0003] To solve the above-mentioned technical problems, the technical solution provided by this utility model is: a multi-jet self-conversion structure for fire monitors, including a monitor head, a monitor barrel disposed outside the monitor head outlet end, and a steering structure connecting the monitor barrel and the outside of the monitor head, so that the monitor barrel is coaxially disposed with the monitor head outlet under the drive of the steering structure, or rotated to a position offset from the monitor head outlet.

[0004] The barrel includes an inner cylinder and an outer cylinder coaxially connected. Both the inner and outer cylinders are hollow structures. A central mesh plate and an outlet mesh plate connect the inner and outer cylinders. The inner cylinder has a gradually decreasing diameter constriction section and a gradually increasing diameter expansion section from its inlet end to the central mesh plate. The constriction section and the expansion section form a Venturi variable diameter section. At the connection between the constriction section and the expansion section, several air intakes are arranged circumferentially.

[0005] Furthermore, the outer cylinder is conical, and its diameter gradually increases from the inlet end to the outlet end mesh plate direction.

[0006] Furthermore, the central mesh plate is conical, with its inlet end connected to the inner wall of the outer cylinder and its other end connected to the outer wall of the inner cylinder.

[0007] Furthermore, multiple support rods are provided between the outer wall of the inner cylinder and the inner wall of the outer cylinder.

[0008] Furthermore, the steering structure includes a connecting ring disposed outside the gun head, with connecting posts disposed at the upper and lower ends of the connecting ring, a rotating sleeve sleeved around the connecting posts, the end of the rotating sleeve being connected to the outer wall of the outer cylinder via a connecting rod, and a steering drive mechanism disposed between the rotating sleeve and the connecting posts.

[0009] Furthermore, the steering drive mechanism includes a worm gear fixed to a connecting column, a worm gear meshing with one side of the worm gear, the worm gear being driven by a motor, and the motor being mounted on a rotating sleeve.

[0010] Furthermore, both the outlet end mesh panel and the middle mesh panel are foamed mesh panels.

[0011] Furthermore, the diameter of the end of the inner cylinder near the gun head is equal to the diameter of the gun head.

[0012] The advantages of this utility model compared with the prior art are as follows:

[0013] (1) This utility model realizes the folding / unfolding of the barrel through a linkage mechanism, and synchronously links the gun head jet mode, which can quickly complete the seamless switching of multiple modes. When the barrel is folded, the DC nozzle of the gun head can be used to switch between DC water jet, spray water jet and strong release foam. DC and spray water jet are used for cooling and explosion suppression, and strong release foam is used for early strong attack fire extinguishing. When the barrel is unfolded, the Venturi diameter section of the inner cylinder is used to spray low-expansion foam for foam coverage fire extinguishing. When the gun head performs a blooming jet, the jet is ejected from the annular area between the inner and outer cylinders, and forms medium-expansion foam through two layers of mesh for foam superposition coverage and direct extinguishing of low-calorific-value liquid fires.

[0014] (2) This utility model drives the connecting rod through the steering drive mechanism to precisely control the rotation of the gun barrel to be parallel to the gun barrel, without affecting the anti-collision probe of the boom and without interfering with the pitch angle of the water gun.

[0015] (3) The barrel of this utility model can be rotated and adjusted at any angle with the cannon head to strike fire points in different directions as needed.

[0016] (4) The barrel of this utility model folds up to a small space and does not affect the cannon head from being inserted into the window to extinguish building fires. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the front side of a multi-jet self-conversion structure for fire monitors according to this utility model.

[0018] Figure 2 This is a schematic diagram of the rear side of a multi-jet self-conversion structure for fire monitors according to this utility model.

[0019] Figure 3This is a schematic diagram of the internal structure of a multi-jet self-conversion structure for fire monitors according to this utility model.

[0020] Figure 4 This is a schematic diagram of the cross-section of a multi-jet self-converting structure for fire monitors according to this utility model.

[0021] Figure 5 This is a schematic diagram of the steering drive mechanism in a multi-jet self-conversion structure for fire monitors according to this utility model.

[0022] Figure 6 This is a schematic diagram of the folded state of a multi-jet self-conversion structure for fire monitors according to this utility model. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0024] In the description of the embodiments of this utility model, it should be noted that if terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," or "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, terms such as "first," "second," and "third" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] Furthermore, the use of terms such as "horizontal," "vertical," and "sag" does not imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0026] In the description of the embodiments of this utility model, "a plurality of" means at least two.

[0027] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] Example 1:

[0029] A multi-jet self-converting structure for fire monitors includes a monitor head 2, a monitor barrel 1 disposed outside the monitor head outlet, and a deflection structure 3 connecting the monitor barrel 1 and the outside of the monitor head 2, such that the monitor barrel 1 is coaxially arranged with the water outlet of the monitor head 2 under the drive of the deflection structure 3, or rotated to a position offset from the water outlet of the monitor head 2.

[0030] The barrel 1 includes an inner cylinder 101 and an outer cylinder 102 coaxially sleeved together. Both the inner cylinder 101 and the outer cylinder 102 are hollow cylinders. A middle mesh plate 103 and an outlet mesh plate 104 connect the inner cylinder 101 and the outer cylinder 102. From its inlet end to the middle mesh plate 103, the inner cylinder 101 is provided with a gradually decreasing diameter constriction section 101a, a gradually increasing diameter expansion section 101b, and a cylindrical section with a constant diameter. The constriction section 101a and the expansion section 101b form a Venturi variable diameter section. At the connection between the constriction section 101a and the expansion section 101b, several air intakes 105 are arranged circumferentially. The outlet mesh plate 104 and the middle mesh plate 103 are both foamed mesh plates. The diameter of the end of the inner cylinder 101 near the gun head 2 is equal to the diameter of the gun head 2.

[0031] The outer cylinder 102 is conical, and its diameter gradually increases from the inlet end mesh plate 103 to the outlet end mesh plate 104; the middle mesh plate 103 is conical, and the inlet end of the middle mesh plate 103 is connected to the inner wall of the outer cylinder 102, and the other end is connected to the outer wall of the inner cylinder 101.

[0032] The steering structure 3 includes a connecting ring 301 disposed outside the gun head 2. The connecting ring 301 has connecting posts 302 disposed at its upper and lower ends. A rotating sleeve 303 is sleeved on the connecting posts 302. The end of the rotating sleeve 303 is connected to the outer wall of the outer cylinder 102 through a connecting rod 304. A steering drive mechanism 305 is disposed between the rotating sleeve 303 and the connecting posts 302. The steering drive mechanism 305 includes a worm gear 305a fixed on the connecting posts 302. A worm is meshed on one side of the worm gear 305a. The worm is driven by a motor 305b, which is disposed on the rotating sleeve 303.

[0033] When only the original fire monitor head is needed, the rotating structure turns the cannon barrel to a position offset from the monitor head. The offset angle is adjusted according to the specific situation. Even if the monitor head sprays water or foam directly outward, the water or foam sprayed from the monitor head does not pass through the cannon barrel. In this state, the monitor head sprays water through its three built-in water spraying methods: straight stream water spray, flower spray water spray, and strong release foam.

[0034] When using the cannon barrel, the steering mechanism rotates the barrel to a position coaxial with the cannon head. At this time, the water or foam sprayed from the cannon head passes through the barrel. When the cannon head sprays a straight jet of water, the water flows through the inner cylinder and is ejected. Due to the Venturi variable diameter section set in the inner cylinder, the air intake circumferentially set at its narrowest point will create negative pressure when the water flows through at high speed, drawing in air. The water and air mix thoroughly, producing a large amount of foam, which is finally sprayed out as low-expansion slow-release foam. When the cannon head is adjusted to a blooming jet, the foam mixture jet flows through the area between the inner and outer cylinders and is ejected outward. At this time, the foam mixture jet flows through the middle mesh plate and the water outlet mesh plate, finally forming medium-expansion slow-release foam.

[0035] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0036] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A multi-jet self-conversion structure for fire monitors, characterized in that, It includes a gun head, a gun barrel located outside the gun head outlet, and a steering structure connecting the gun barrel and the outside of the gun head, so that the gun barrel is coaxially arranged with the gun head outlet under the drive of the steering structure, or rotated to a position offset from the gun head outlet. The barrel includes an inner cylinder and an outer cylinder coaxially connected. Both the inner and outer cylinders are hollow structures. A central mesh plate and an outlet mesh plate connect the inner and outer cylinders. From its inlet end to the central mesh plate, the inner cylinder has a gradually decreasing diameter constriction section, a gradually increasing diameter expansion section, and a cylindrical section with a constant diameter. The constriction section and the expansion section form a Venturi variable diameter section. At the connection between the constriction section and the expansion section, several air intakes are arranged circumferentially.

2. The multi-jet self-conversion structure for fire monitors according to claim 1, characterized in that, The outer cylinder is conical, and its diameter gradually increases from the inlet end to the outlet end of the mesh plate.

3. A multi-jet self-conversion structure for fire monitors according to claim 1, characterized in that, The central mesh plate is conical, with its inlet end connected to the inner wall of the outer cylinder and its other end connected to the outer wall of the inner cylinder.

4. A multi-jet self-conversion structure for fire monitors according to claim 1, characterized in that, Multiple support rods are also provided between the outer wall of the inner cylinder and the inner wall of the outer cylinder.

5. A multi-jet self-conversion structure for fire monitors according to claim 1, characterized in that, The steering structure includes a connecting ring disposed outside the gun head, with connecting posts disposed at the upper and lower ends of the connecting ring, a rotating sleeve sleeved around the connecting posts, the end of the rotating sleeve being connected to the outer wall of the outer cylinder via a connecting rod, and a steering drive mechanism disposed between the rotating sleeve and the connecting posts.

6. A multi-jet self-conversion structure for fire monitors according to claim 5, characterized in that, The steering drive mechanism includes a worm gear fixed to a connecting column, a worm gear meshing on one side of the worm gear, the worm gear being driven by a motor, and the motor being mounted on a rotating sleeve.

7. A multi-jet self-conversion structure for fire monitors according to claim 1, characterized in that, Both the outlet end mesh panel and the middle mesh panel are foamed mesh panels.

8. A multi-jet self-conversion structure for fire monitors according to claim 1, characterized in that, The diameter of the inner cylinder at the end closest to the gun head is equal to the diameter of the gun head.

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