CN214633488U

CN214633488U - Reverse injection foam mixer for injection type foam station

Info

Publication number: CN214633488U
Application number: CN202120005744.8U
Authority: CN
Inventors: 马永跃; 徐大圣; 孙红升; 孙磊
Original assignee: Tianjin Juzhen Automation Equipment Co ltd
Current assignee: Tianjin Juzhen Automation Equipment Co ltd
Priority date: 2021-01-04
Filing date: 2021-01-04
Publication date: 2021-11-09
Anticipated expiration: 2031-01-04

Abstract

The utility model provides a reverse injection foam mixer that injection type foam station was used, include: the mixer comprises a mixer jacket, a mixer inner cavity, a throat pipe and a flange, wherein the mixer inner cavity is arranged in the mixer jacket and is in interference connection with the mixer jacket, the periphery of the mixer inner cavity is provided with a pre-spraying groove, the throat pipe is arranged at the top of the mixer jacket and is used for enabling foam stock solution to flow into the pre-spraying groove, the flange is arranged at one end, far away from the mixer jacket, of the throat pipe, and a plurality of spraying holes inclined to the central axis of the mixer inner cavity are formed in a diffusion section of the mixer inner cavity. The utility model discloses an injection of foam stoste can carry out twice and mix, improves the degree of mixing of foam stoste and clear water, and it is big to have solved among the prior art hydraulic loss, makes the mixed liquid of foam mix and reaches better precision, has avoided mixed liquid to cause the problem of corruption to the blender, and each part all adopts 304 stainless steel processing to form, is equipped with the butter and seals, has improved corrosion resistance greatly, plays important role to the steady operation of whole foam proportion hybrid system.

Description

Reverse injection foam mixer for injection type foam station

Technical Field

The utility model relates to a foam fire-extinguishing equipment technical field, concretely relates to reverse injection foam mixer that injection type foam station was used.

Background

The foam fire extinguishing system is an efficient and rapid fire extinguishing system, and is widely applicable to fire suppression in oil refineries, chemical plants, oil fields, oil depots, wharfs, hangars, airports, fuel oil boiler rooms, coal mines and other places for producing and storing A, B and C liquids. The foam liquid mixer is a key device for mixing foam liquid and water into foam mixed liquid in a certain proportion, and plays an important role in a foam fire extinguishing system.

The existing mixer used in the foam fire extinguishing system is mainly a hole plate type proportional mixer and has the defects of large water pressure loss, large mixing local resistance, low precision of foam mixed liquid, poor corrosion resistance and the like.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that overcome exist among the prior art not enough, provide a reverse jet foam mixer that injection type foam station was used.

The utility model discloses a realize through following technical scheme:

a back-jet foam mixer for an injection foam station, comprising: a blender overcoat, one set up in the blender overcoat and with a blender inner chamber that blender overcoat interference is connected, the blender inner chamber sets up all around and spouts the groove in advance, one set up in blender overcoat top is used for the foam stoste to flow in spout the choke in the groove in advance, one set up in the choke is kept away from the flange of blender overcoat one end, the diffuser section of blender inner chamber set up a plurality of slope in the jet orifice of blender inner chamber axis, the foam stoste passes through the jet orifice mixes with the fire water of flowing through the blender inner chamber.

Further, the inner wall of the inner cavity of the mixer is in the shape of a venturi tube.

Further, the injection hole is inclined in a direction opposite to the flow direction of the fire water.

Further, the sectional area of the pre-spraying groove is not less than half of the inner cross section of the throat pipe.

Further, the axis of the injection hole and the central axis of the inner cavity of the mixer form an included angle of 83.17 degrees.

Further, the size of the injection hole is φ 12.

Further, the number of the injection holes is 20.

Further, grease for corrosion prevention is covered between the inner cavity of the mixer and the outer sleeve of the mixer.

The utility model has the advantages that: the embodiment of the utility model provides an it can carry out twice mixture to have realized the once injection of foam stoste, improves the degree of mixing of foam stoste and clear water. Make the mixed liquid mixing accuracy of foam better, avoided mixed liquid to cause the problem of corruption to the blender, each part of this blender all adopts 304 stainless steel processing to form, is equipped with the butter and seals, has improved corrosion resistance greatly, plays important effect to the steady operation of whole foam proportion hybrid system.

Drawings

Fig. 1 is a schematic structural diagram of a back-jet foam mixer for an injection foam station according to an embodiment of the present invention.

In the figure: 1. a flange; 2. a throat; 3. an injection hole; 4. pre-spraying a groove; 5. an inner cavity of the mixer; 6. a mixer jacket; 7. the inner cavity of the Venturi tube.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and preferred embodiments.

In describing the embodiments of the present invention, the view angle of fig. 1 is defined as a schematic view of a main view structure of a back-jet foam mixer for an injection foam station according to the embodiments of the present invention. In the description of the embodiments of the present invention, it should be understood that the terms "vertical", "horizontal", "upper", "lower", "left", "right", "vertical", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only used for convenience of description and simplification of the description of the embodiments of the present invention, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the embodiments of the present invention. In the description of the embodiments of the present invention, it should be noted that unless explicitly stated or limited otherwise, the terms "disposed," "connected," and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art through specific situations. Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of illustrating embodiments of the present invention and are not to be construed as limiting the embodiments of the present invention.

At present, foam devices in China are divided into two main types of negative pressure type and positive pressure type, wherein the negative pressure type foam devices adopt a Venturi tube type proportional mixer, a negative pressure area is formed at the outlet of the mixer, and foam stock solution is sucked into the mixer and mixed with water; the positive pressure type is mostly adopted by an injection type foam proportion mixing device, a foam mixer adopted in the positive pressure type is in a pipeline butt-clamp type, mostly is a reducing tee, and the liquid injection direction of foam stock solution is perpendicular to the water flow direction. Although the product can complete the mixing of the foam stock solution and the clear water, the smooth injection of the foam stock solution can be ensured only by requiring the injection pressure of the foam stock solution to greatly exceed the pressure of the clear water in the pipeline, so that the mixing is realized, the uniformity degree of the mixing depends on the high pressure of the stock solution pipeline and the night-separating characteristic of the foam stock solution, the high pressure of the stock solution pipeline depends on the energy consumption of a power source, and the development trend of energy conservation and emission reduction is not met.

Referring to fig. 1, a schematic structural diagram of a back-jet foam mixer for an injection foam station according to an embodiment of the present invention includes: a blender overcoat 6, one set up in the blender overcoat 6 and with a blender inner chamber 5 that 6 interference of blender overcoat is connected, blender inner chamber 5 sets up spout groove 4 in advance all around, one set up in 6 tops of blender overcoat are used for the foam stoste to flow in spout choke 2 in the groove 4 in advance, one set up in choke 2 keeps away from the flange 1 of 6 one ends of blender overcoat, the diffuser section of blender inner chamber 5 is seted up a plurality of and is inclined to the jet orifice 3 of 5 axis in blender inner chamber, the foam stoste passes through jet orifice 3 and flow through the fire water of blender inner chamber 5 mixes.

The inner wall of the mixer inner cavity 5 is shaped as a venturi tube.

The inclined direction of the jet hole 3 is opposite to the flowing direction of the fire fighting water, and the sectional area of the pre-jet groove 4 is not less than half of the inner cross section of the throat pipe 2.

Further, the included angle between the axis of the injection hole 3 and the central axis of the mixer inner cavity 5 is 83.17 degrees. The size of the injection holes 3 is phi 12, and the number of the injection holes 3 is 20.

Furthermore, grease for corrosion protection is covered between the mixer inner cavity 5 and the mixer outer sleeve 6.

Preferably, the embodiment of the present invention provides a mixer outer casing 6 and a mixer inner cavity 5 which are formed by processing 304 stainless steel, a throat pipe 2 is a DN50 stainless steel pipe, and a flange 1 is a standard flange with a pressure bearing 1.6Mpa which can be changed into 2.5Mpa according to requirements.

Specifically, when the mixer works, foam stock solution flows into the pre-spraying groove 4 around the inner cavity 5 of the mixer from the throat pipe 2 and is filled in the pre-spraying groove, meets fire water passing through the Venturi tube structure, the spraying hole 3 is positioned at the diffusion section of the Venturi tube structure, the water pressure is instantly reduced, the foam stock solution flows out of the foam liquid pump to the pre-spraying groove 4 and keeps high pressure, and the foam stock solution can be smoothly sprayed into the inner cavity 5 of the mixer due to the pressure difference. Because the jet orifice 3 is inclined, is reverse to the fire-fighting water flow direction, the foam stock solution is scattered and fully mixed instantly when being injected into the fire-fighting water. Because the jet orifice 3 is reverse trompil, the foam stoste can receive the reverse direction impact of fire water at the moment of spouting, through calculation and test, when the trompil angle of jet orifice 3 is 83.17 degrees, just can play fine mixed effect under the prerequisite that the foam stoste pours into the blender into smoothly.

The embodiment of the utility model provides an it can carry out twice mixture to have realized the once injection of foam stoste, improves the degree of mixing of foam stoste and clear water. The problem of among the prior art hydraulic loss be big, realized that foam mixed liquid mixing accuracy improves, avoided mixed liquid to cause the corruption to the blender, each part of this blender all adopts 304 stainless steel processing to form, is equipped with the butter and seals, has improved corrosion resistance greatly, plays important effect to the steady operation of whole foam proportion hybrid system.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A backjet foam mixer for an injection foam station, comprising: a blender overcoat, one set up in the blender overcoat and with a blender inner chamber that blender overcoat interference is connected, the blender inner chamber sets up all around and spouts the groove in advance, one set up in blender overcoat top is used for the foam stoste to flow in spout the choke in the groove in advance, one set up in the choke is kept away from the flange of blender overcoat one end, the diffuser section of blender inner chamber set up a plurality of slope in the jet orifice of blender inner chamber axis, the foam stoste passes through the jet orifice mixes with the fire water of flowing through the blender inner chamber.

2. A reverse jet foam mixer for an injection foam station as claimed in claim 1 wherein the inner wall of the mixer chamber is in the form of a venturi.

3. A reverse jet foam mixer for an injection foam station as set forth in claim 2 wherein said jet orifices are inclined in a direction opposite to the direction of flow of the fire water.

4. A backfoaming foam mixer for an injection foam station according to claim 2, wherein said pre-nozzle slot cross-sectional area is not less than half of the internal cross-section of said throat.

5. A reverse jet foam mixer for an injection foam station as set forth in claim 3 wherein the axis of said jet orifices is angled at 83.17 degrees from the central axis of said mixer chamber.

6. A backfoaming foam mixer for an injection foam station according to claim 5, wherein said spray holes have a size of phi 12.

7. A reverse jet foam mixer for an injection foam station as claimed in claim 6 wherein the number of said jet holes is 20.

8. A reverse jet foam mixer for an injection foaming station according to any of the claims 1-7, wherein grease for corrosion protection is applied between the inner mixer chamber and the outer mixer jacket.