Foam nozzle for fire extinguisher

Abstract

The foam nozzle for the fire extinguisher comprises a mixing body and a flow guide cover, four through grooves are formed in the mixing body and symmetrically distributed, clamping blocks are arranged in the through grooves, the clamping blocks and the mixing body are integrally formed, clamping grooves are formed in the flow guide cover, the clamping grooves and the clamping blocks are used in a matched mode, and the flow guide cover is arranged in the clamping grooves. A movable ring is arranged outside the flow guide cover in a sleeving mode and slidably connected with the flow guide cover, a connecting block is fixedly connected to the bottom of the movable ring, and a push block is fixedly connected to the position, located on the inner side of the clamping groove, outside the connecting block. Belongs to the technical field of fire-fighting. According to the foam nozzle for the fire extinguisher, when the flow guide cover is disassembled, a user can push a movable ring in the direction close to the mixing body, at the moment, the movable ring can drive a push block to extrude clamping blocks in clamping grooves through a connecting block until the four clamping blocks are separated from the four clamping grooves at the same time, and at the moment, the user can take down the flow guide cover from the mixing body; and the clamping block does not need to be pressed by a tool.

Description

Technical Field

[0001] The utility model relates to the technical field of fire fighting, and more specifically, to a foam nozzle for a fire extinguisher. Background Technique

[0002] A foam nozzle for a fire truck is a fire extinguishing device that generates and sprays air foam. The foam liquid mixture is transported through a pipeline to the foam nozzle. Air is inhaled at the outlet of the foam nozzle to form air foam, which is then foamed and sprayed. The mixing uniformity of the premixed foam liquid and air affects the state of the sprayed foam.

[0003] The Chinese patent discloses a foam nozzle structure for a fire extinguisher with the patent number CN202223321691.4. This utility model has sufficient and uniform mixing, improved foam foaming rate, high spray divergence intensity, stable structural connection, fast and convenient installation, and convenient later disassembly and maintenance. However, there are still certain problems. Between the nozzle head and the mixture, and between the mixture and the deflector hood of this utility model, they are quickly connected through a clamping block and a clamping groove. After the clamping block and the clamping groove are engaged, the right-angle of the clamping groove is stuck at the right-angle of the guide plate to achieve the effect of being easy to insert and difficult to pull out. When it is necessary to disassemble the deflector hood, it will be very inconvenient. The user needs to press the clamping blocks at multiple different positions simultaneously to unlock. Moreover, generally, a flat-head screwdriver needs to be used to tighten the clamping block and the clamping groove to separate them, which is very inconvenient. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a foam nozzle for a fire extinguisher to solve the problems raised in the above background technique:

[0005] Between some existing nozzle heads and the mixture, and between the mixture and the deflector hood, they are quickly connected through a clamping block and a clamping groove. After the clamping block and the clamping groove are engaged, the right-angle of the clamping groove is stuck at the right-angle of the guide plate to achieve the effect of being easy to insert and difficult to pull out. When it is necessary to disassemble the deflector hood, it will be very inconvenient. The user needs to press the clamping blocks at multiple different positions simultaneously to unlock. Moreover, generally, a flat-head screwdriver needs to be used to tighten the clamping block and the clamping groove to separate them, which is very inconvenient.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] Foam nozzle for fire extinguisher, comprising a mixing body and a flow guide cover. A through groove is provided inside the mixing body. There are four through grooves in total, and the four through grooves are symmetrically distributed. A clamping block is arranged inside the through groove, and the clamping block is integrally formed with the mixing body. A clamping groove is provided inside the flow guide cover, and the clamping groove is used in cooperation with the clamping block. Through the clamping block and the clamping groove, the mixing body and the flow guide cover can be quickly installed. An activity ring is sleeved outside the flow guide cover, and the activity ring is slidably connected to the flow guide cover. A connecting block is fixedly connected to the bottom of the activity ring, and a pushing block is fixedly connected to the outside of the connecting block and inside the clamping groove. The pushing block is used in cooperation with the clamping block. The pushing block is located inside the clamping groove. When the user pushes the activity ring, the activity ring can drive the pushing block to move through the connecting block, so that the pushing block presses the clamping block in the clamping groove until the clamping block is separated from the clamping groove, thereby achieving the purpose of unlocking and detaching the flow guide cover and the mixing body, and the operation can be carried out without the aid of other tools.

[0008] Preferably, a positioning block is fixedly connected to the outside of the mixing body, and a positioning groove is provided inside the flow guide cover. The positioning groove is used in cooperation with the positioning block. Under the action of the positioning groove and the positioning block, when the user connects the mixing body and the flow guide cover, only by positioning the positioning groove and the positioning block can the normal clamping of the four clamping blocks and the clamping grooves at different positions be ensured, and at the same time, the situation of torsion misalignment during the connection of the mixing body and the flow guide cover can be prevented.

[0009] Preferably, convex blocks are fixedly connected to the outside of both the mixing body and the flow guide cover, and the convex blocks on the mixing body and the flow guide cover cooperate with each other. When the user touches the mixing body or the flow guide cover, the correct connection direction of the flow guide cover and the mixing body can be quickly distinguished by the sense of touch, which is beneficial to the clamping of the clamping block and the clamping groove. The user can pick it up and install it without having to check the position separately, improving the convenience of use.

[0010] Preferably, a filter screen is fixedly connected to the inside of the flow guide cover. The filter screen further refines the mixture of foam and air, increases the foaming rate of the mixture of foam and air, and is more helpful for extinguishing fires.

[0011] Preferably, an air inlet hole is provided inside the mixing body, and a flow dividing hole is provided at the bottom of the mixing body. The air inlet hole is used for the entry of air. When the foam passes through the flow dividing hole, it will become scattered and expand, making the mixing of foam and air more sufficient. When the foam is ejected, air enters the mixing body through the air inlet hole and mixes with the foam.

[0012] Preferably, a plurality of grooves are provided inside the mixing body, which are arranged around the outside of the mixing body. A reinforcing rib is formed between adjacent two grooves, which can improve the overall strength of the mixing body.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1) When using the foam nozzle of this fire extinguisher, when disassembling the flow guide cover, the user can push the movable ring in the direction close to the mixture. At this time, the movable ring will drive the push block through the connecting block to squeeze the clamping block in the clamping groove until the four clamping blocks are simultaneously disengaged from the four clamping grooves. At this time, the user can remove the flow guide cover from the mixture without using tools to press the clamping block.

[0015] 2) When using the foam nozzle of this fire extinguisher, when the user connects the mixture and the flow guide cover, by touching the convex blocks on the mixture and the flow guide cover with fingers, the user can distinguish the correct installation positions of the mixture and the flow guide cover, and then slide the positioning block into the positioning groove. At this time, the four clamping blocks on the mixture will automatically align with the four clamping grooves on the flow guide cover, enabling the user to pick it up and install it without having to check the position separately before installation, improving the convenience of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the whole of the present utility model;

[0017] Figure 2 is an exploded view of the present utility model;

[0018] Figure 3 is a schematic structural diagram of the positioning block of the present utility model;

[0019] Figure 4 is a schematic structural diagram of the shunt hole of the present utility model;

[0020] Figure 5 is a schematic structural diagram of the positioning groove of the present utility model;

[0021] Figure 6 is a schematic structural diagram of the movable ring of the present utility model.

[0022] Explanation of the reference numerals in the drawings: 1, mixture; 2, flow guide cover; 3, through groove; 4, clamping block; 5, clamping groove; 6, movable ring; 7, connecting block; 8, push block; 9, positioning block; 10, positioning groove; 11, convex block; 12, filter net; 13, air inlet hole; 14, shunt hole; 15, groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to 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 of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0024] Please refer to Figures 1 to 6 Figures 1 to 6 , a foam nozzle for a fire extinguisher, includes a mixing body 1 and a deflector 2. A through groove 3 is provided inside the mixing body 1. There are four through grooves 3 in total, and the four through grooves 3 are symmetrically distributed. A clamping block 4 is arranged inside the through groove 3, and the clamping block 4 is integrally formed with the mixing body 1. A clamping groove 5 is provided inside the deflector 2, and the clamping groove 5 is used in cooperation with the clamping block 4. Through the clamping block 4 and the clamping groove 5, the mixing body 1 and the deflector 2 can be quickly installed. An activity ring 6 is sleeved outside the deflector 2, and the activity ring 6 is slidably connected to the deflector 2. A connecting block 7 is fixedly connected to the bottom of the activity ring 6. A pushing block 8 is fixedly connected to the outside of the connecting block 7 and inside the clamping groove 5. The pushing block 8 is used in cooperation with the clamping block 4. The pushing block 8 is located inside the clamping groove 5. When the user pushes the activity ring 6, the activity ring 6 can drive the pushing block 8 to move through the connecting block 7, so that the pushing block 8 presses the clamping block 4 in the clamping groove 5 until the clamping block 4 is separated from the clamping groove 5, so as to achieve the purpose of unlocking and detaching the deflector 2 and the mixing body 1.

[0025] Furthermore, a positioning block 9 is fixedly connected to the outside of the mixing body 1, and a positioning groove 10 is provided inside the deflector 2. The positioning groove 10 is used in cooperation with the positioning block 9. Under the action of the positioning groove 10 and the positioning block 9, when the user connects the mixing body 1 and the deflector 2, only by positioning the positioning groove 10 and the positioning block 9 can the normal engagement of the four clamping blocks 4 at different positions with the clamping grooves 5 be ensured, which is more convenient and fast, and can prevent the mixing body 1 and the deflector 2 from being twisted and misaligned during the connection process.

[0026] Furthermore, bump blocks 11 are fixedly connected to the outside of both the mixing body 1 and the deflector 2. The bump blocks 11 on the mixing body 1 and the deflector 2 cooperate with each other. When the user touches the mixing body 1 or the deflector 2, the correct connection direction of the deflector 2 and the mixing body 1 can be quickly distinguished by the sense of touch, which is beneficial to the engagement of the clamping block 4 and the clamping groove 5.

[0027] Furthermore, a filter screen 12 is fixedly connected to the inside of the deflector 2. The filter screen 12 further refines the mixture of foam and air, increasing the foaming rate of the mixture.

[0028] Furthermore, an air inlet hole 13 is provided inside the mixing body 1, and a diversion hole 14 is provided at the bottom of the mixing body 1. The air inlet hole 13 is used for the entry of air, so that the foam is mixed with air. The diversion hole 14 causes the sprayed foam to expand, making the mixing of the foam and air more sufficient.

[0029] Furthermore, a plurality of grooves 15 are provided inside the mixing body 1. The grooves 15 are arranged around the outside of the mixing body 1. A reinforcing rib is formed between two adjacent grooves 15, which can improve the overall strength of the mixing body 1 and make the mixing body 1 less likely to deform.

[0030] Steps of using the utility model: When using the foam nozzle of this fire extinguisher, when the user holds the mixture 1 and the flow guide cover 2, by touching the bumps 11 on the mixture 1 and the flow guide cover 2 with fingers, the user can distinguish the correct installation positions of the mixture 1 and the flow guide cover 2. Then, slide the positioning block 9 into the positioning groove 10. At this time, the four clamping blocks 4 on the mixture 1 will automatically align with the four clamping grooves 5 on the flow guide cover 2. After slight pressing, the clamping blocks 4 can be driven to engage with the clamping grooves 5, thus completing the installation of the flow guide cover 2 and the mixture 1. If it is necessary to disassemble the flow guide cover 2, the user can push the movable ring 6 in the direction close to the mixture 1. At this time, the movable ring 6 will drive the push block 8 to squeeze the clamping blocks 4 in the clamping grooves 5 through the connecting block 7 until the four clamping blocks 4 are disengaged from the four clamping grooves 5 simultaneously. At this time, the user can remove the flow guide cover 2 from the mixture 1 without using tools to press the clamping blocks 4, which is convenient to operate and has a simple structure.

[0031] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art of this industry should understand that the utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only the preferred examples of the utility model and do not limit the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the utility model claimed. The scope of protection claimed by the utility model is defined by the appended claims and their equivalents.

Claims

1. A foam nozzle for a fire extinguisher, comprising a mixing body (1) and a flow guide cover (2), characterized in that: The mixing body (1) is provided with a through groove (3) in its interior, and there are four through grooves (3) in total. The four through grooves (3) are symmetrically distributed. A clamping block (4) is provided in the interior of the through groove (3), and the clamping block (4) is integrally formed with the mixing body (1). The air deflector (2) is provided with a clamping groove (5), and the clamping groove (5) is used in conjunction with the clamping block (4). The air deflector (2) is sleeved with a movable ring (6) on its exterior, and the movable ring (6) is slidably connected to the air deflector (2). A connecting block (7) is fixedly connected to the bottom of the movable ring (6), and a push block (8) is fixedly connected to the exterior of the connecting block (7) and located on the inner side of the clamping groove (5), and the push block (8) is used in conjunction with the clamping block (4).

2. The foam nozzle for fire extinguisher according to claim 1, characterized in that: A positioning block (9) is fixedly connected to the outside of the mixing body (1), and a positioning groove (10) is provided inside the deflector (2), and the positioning groove (10) is used in conjunction with the positioning block (9).

3. The foam nozzle for fire extinguisher according to claim 1, characterized in that: The outsides of the mixing body (1) and the air guide cover (2) are both fixedly connected with protrusions (11).

4. The foam nozzle for fire extinguisher according to claim 1, characterized in that: A filter screen (12) is fixedly connected to the interior of the air guide cover (2).

5. The foam nozzle for fire extinguisher according to claim 1, characterized in that: An air inlet hole (13) is provided inside the mixing body (1), and a flow diversion hole (14) is provided at the bottom of the mixing body (1).

6. The foam nozzle for fire extinguisher according to claim 1, characterized in that: A groove (15) is provided inside the mixing body (1).

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