CN209762252U

CN209762252U - Foam proportional mixing valve

Info

Publication number: CN209762252U
Application number: CN201920380546.2U
Authority: CN
Inventors: 陈海兵; 蔡晓幸; 冯海平; 李效选; 王斌; 蔡祝平
Original assignee: DONGTAI CITY DONG FANG MARINE FITTING Co Ltd
Current assignee: DONGTAI CITY DONG FANG MARINE FITTING Co Ltd
Priority date: 2019-03-25
Filing date: 2019-03-25
Publication date: 2019-12-10
Anticipated expiration: 2029-03-25

Abstract

the utility model discloses a foam proportional mixing valve, including the blender, this blender is connected with the disk seat through the connecting pipe, fixed mounting has the lower valve gap on the disk seat, forms the balanced chamber between the lower valve gap and the upper valve gap of mutual fixed connection, is provided with the balanced diaphragm that is held fixedly by lower valve gap and upper valve gap clamp in this balanced chamber, sliding support has the case in the case hole of upper valve gap, and one end and the balanced diaphragm fixed connection of this case, the case passes through the upper seal spare and slides and supports in the case hole of upper valve gap with lower seal spare, is provided with lubricated chamber between upper seal spare and lower seal spare; the liquid mixer is fixedly provided with a liquid mixing cyclone cylinder, and a cyclone cylinder guide fin is arranged on a cyclone cylinder body of the liquid mixing cyclone cylinder. The upper sealing piece and the lower sealing piece are embedded on the upper valve cover, and the upper sealing piece, the lower sealing piece, the upper valve cover and the valve core enclose a lubricating cavity. The mixing valve has the advantages that the valve core slides flexibly, and the fire-fighting water and the foam stock solution are mixed fully and uniformly.

Description

Foam proportional mixing valve

Technical Field

The utility model relates to a fire engineering equipment especially relates to a be applied to mixing valve of fire-fighting water and foam stoste among balanced type foam proportional mixing device.

Background

The balanced foam proportioning device is a more advanced foam fire extinguishing device, and is particularly suitable for important fire fighting projects such as petrochemical enterprises, large ships, large oil depots, oil platforms, power stations, tunnel projects and the like. The balanced foam proportion mixing device mixes the fire-fighting water and the foam stock solution into foam mixed liquid according to a specified proportion, and sprays a large amount of carbon dioxide and foam to adhere the foam mixed liquid to the combustible to isolate the combustible from air and destroy combustion conditions, thereby achieving the purpose of fire extinguishing.

The foam proportional mixing valve is an important part in the balanced foam proportional mixing device, when the fire-fighting water pipeline supplies water to the mixing valve at a certain water pressure and flow rate, foam mixed liquid with a relatively precise mixing ratio is continuously prepared through the mixing valve, and the foam mixed liquid is sprayed outwards through the spraying equipment to extinguish fire. The existing foam mixing proportional mixing valve mainly comprises a balance liquid supply part and a water and foam stock solution mixing part which are communicated with each other, wherein a valve core in the balance part freely slides in a corresponding valve hole, and whether foam mixed liquid with a more accurate mixing ratio can be prepared or not is determined. In the prior structure, the valve core is directly arranged in the corresponding valve hole in a sliding manner, and as the fire-fighting water often contains various impurities and particles, the fire-fighting water containing various impurities and particles can easily enter between sliding surfaces formed by the valve core and the valve hole, the sliding of the valve core is easily blocked or even blocked; meanwhile, as the service life is prolonged, abrasion gaps can occur between the valve core and the valve hole, so that the foam stock solution and the fire-fighting water are leaked, the valve core malfunctions, movement blockage or blockage easily occurs, series flow leakage can occur on the sliding surface of the valve core, and the accurate control of the mixing ratio of the water and the foam stock solution cannot be realized. The liquid mixer in the existing mixing part injects the foam liquid from the upper side position of the fire water pipe into the fire water, and because of the influence of the laminar flow effect of the fire water, the foam stock liquid and the fire water on the upper layer of the pipeline are often mixed, while the content of the foam stock liquid in the fire water on the lower layer of the pipeline is lower, and a mixing proportion gradient is formed on the cross section of the pipeline. Therefore, the existing proportional mixing valve has the defects of insensitive sliding of a valve core, insufficient mixing of a liquid mixer, difficulty in accurately controlling the mixing ratio and insufficient liquid mixing, greatly influences the fire extinguishing performance of foam mixed liquid sprayed by the foam proportional mixing device and directly influences the fire extinguishing efficiency of the fire extinguishing device.

SUMMERY OF THE UTILITY MODEL

to the above-mentioned defect that prior art exists, the utility model aims to solve the technical problem that a foam proportional mixing valve is provided, not only the case slides in a flexible way, sealed reliable does not have the seepage, and fire-fighting water and foam stoste mix abundant even moreover.

In order to solve the technical problem, the utility model discloses a foam proportional mixing valve, including the blender, this blender is connected with the valve seat through the connecting pipe, and fixed mounting has the lower valve gap on the valve seat, forms balanced chamber between lower valve gap and the upper valve gap of mutual fixed connection, is provided with in this balanced chamber by lower valve gap and the fixed balanced diaphragm of upper valve gap clamp, sliding support has the case in the case hole of upper valve gap, and one end and the balanced diaphragm fixed connection of this case, the case passes through upper seal spare and lower seal spare sliding support in the case hole of upper valve gap, is provided with lubricated chamber between upper seal spare and lower seal spare; the liquid mixer is fixedly provided with a liquid mixing cyclone cylinder, and a cyclone cylinder guide fin is arranged on a cyclone cylinder body of the liquid mixing cyclone cylinder.

In the technical scheme, the valve core is supported in the valve core hole of the upper valve cover in a sliding manner through the upper sealing piece and the lower sealing piece, so that the mutual leakage of fire-fighting water and foam stock solution between the sliding surfaces is well prevented, the pressure balance between two sides of the balance diaphragm is effectively kept, impurity components in the fire-fighting water are effectively prevented from entering the sliding surface of the valve core, the abrasion of the sliding surface is reduced, and the phenomenon of blocking of the valve core is eliminated. And because the lubricating cavity is arranged between the upper sealing element and the lower sealing element, the lubricant filled in the lubricating cavity can fully lubricate the sliding surface of the valve core, so that the valve core can flexibly slide and reliably move, and the precise control of the mixing ratio can be ensured. Still owing to be provided with cyclone water conservancy diversion fin on the liquid mixing cyclone body of fixed mounting on the liquid mixer, cyclone water conservancy diversion fin forms strong stirring to the foam stoste of pouring into the fire-fighting water under the effect of fire-fighting water pressure and flow, forms a plurality of mixed whirl, makes fire-fighting water and foam stoste obtain abundant stirring and mixes, forms the even abundant foam fire extinguishing liquid of mixing ratio, has improved the fire extinguishing efficiency of fire extinguishing agent greatly, has also reduced the waste of fire extinguishing agent. The utility model discloses a mixing valve still has reasonable in design, and the structure is exquisite, convenient to use and manufacturing.

The utility model discloses a preferred embodiment, go up the sealing member and all inlay the dress on last valve gap with lower sealing member, should go up sealing member, lower sealing member, go up valve gap and case and enclose into lubricated chamber. And lubricating oil or lubricating grease is filled in the lubricating cavity. And the upper sealing element and the lower sealing element are O-shaped rubber sealing rings. Reasonable structure, convenient maintenance and installation.

The utility model discloses a preferred embodiment, the liquid mixer is equipped with the through-flow hole, and this through-flow hole is in on the same central line with liquid mixing whirl section of thick bamboo. The flow guide cavity on the liquid mixer corresponds to the inner side of the cylinder wall of the liquid mixing cyclone cylinder. The liquid mixing cyclone cylinder comprises a cyclone cylinder body and cyclone cylinder guide vanes fixedly arranged on the cyclone cylinder body. The cyclone cylinder guide vanes and the cylinder wall of the cyclone cylinder body are arranged in a mutually crossed mode. Can form effective mixing and stirring effects, and the mixed liquid is fully and uniformly.

The utility model discloses a further embodiment, be equipped with the through-flow hole on the liquid mixer, the one end fixedly connected with fire hose in this through-flow hole, the other end fixedly connected with foam liquid mixing pipe in through-flow hole. So that the liquid mixer is positioned between the fire-fighting water and the foam liquid mixing pipe, and is convenient for mixing and conveying.

The utility model discloses a further embodiment, the through-flow hole on the liquid mixer accesss to through balanced leading water pipe the balanced chamber of balanced diaphragm upside. The water diversion structure is simple and reasonable.

Drawings

The foam proportioning mixing valve of the present invention will be further described with reference to the accompanying drawings and the following detailed description.

FIG. 1 is a schematic cross-sectional view of one embodiment of the foam proportioning valve of the present invention;

FIG. 2 is a left cross-sectional structural view of the embodiment of FIG. 1;

FIG. 3 is an enlarged view of the partial structure of portion I in FIG. 2;

FIG. 4 is a schematic view of an assembly structure of the liquid mixer and the liquid mixing cyclone cartridge in the embodiment of FIG. 1;

FIG. 5 is a schematic view of the cross-sectional structure B-B of the structure shown in FIG. 4;

FIG. 6 is a schematic front view of the liquid mixing cyclone cartridge in the embodiment of FIG. 1;

Fig. 7 is a left side view schematic of the structure shown in fig. 6.

In the figure, 1-water pipe flange, 2-connecting pipe, 3-valve seat, 4-lower valve cover, 5-upper valve cover, 6-valve core, 7-balance diaphragm, 8-connecting pipe, 9-liquid mixer, 10-liquid mixing cyclone cylinder, 101-cyclone cylinder body, 102-cyclone cylinder guide vane, 11-foam liquid mixing pipe, 12-liquid mixing pipe flange, 13-balance water guide pipe, 14-guide cavity, 15-upper sealing element, 16-upper balance water guide hole, 17-lubricating cavity, 18-lower sealing element and 19-lower balance water guide hole.

Detailed Description

The foam proportional mixing valve shown in fig. 1 and 2 comprises a mixer 9, wherein the lower end of a connecting pipe 8 is screwed with the mixer 9, the upper end of the connecting pipe 8 is screwed with a valve seat 3, a lower valve cover 4 is fixedly arranged on the valve seat 3, an upper valve cover 5 is fixedly arranged on the lower valve cover 4, a balance diaphragm 7 is fixedly clamped between the upper valve cover 4 and the lower valve cover 5 which are mutually clamped and fixed, and the balance diaphragm 7 is positioned in a balance cavity formed by the upper valve cover 4 and the lower valve cover 5. A valve core 6 is slidably supported in a valve core hole of the upper valve cover 5, and the lower end of the valve core 6 is fixedly connected with a balance diaphragm 7. A balance water conduit 13 is communicated between the liquid mixer 9 and the upper valve cover 5, and fire water is led to a balance cavity on the upper side of the balance diaphragm 7 through a lower balance water conduit 19 on the liquid mixer 9, the balance water conduit 13, the upper valve cover 5 and an upper balance water conduit 16 on the upper valve cover.

Fire hose 2 is the tubular structure, and at its both ends fixedly connected with water pipe flange 1, the same foam mixes liquid pipe 11 and also is the tubular structure, and its both ends are also fixedly connected with and mix liquid pipe flange 12, and the liquid mixer 9 centre gripping is fixed in between to water pipe flange 1 and the liquid mixer flange 12 that the position is relative for fire hose 2 leads to foam through the through-flow hole of liquid mixer 9 and mixes liquid pipe 11, and fire hose 2, the through-flow hole of liquid mixer 9 and foam mix liquid pipe 11 and be located same central line.

As shown in fig. 3, the spool 6 is slidably supported in the spool hole of the upper bonnet 5 by an upper seal 15 and a lower seal 18, the upper seal 15 and the lower seal 18 are both fitted in seal grooves of the upper bonnet 5, and the upper seal 15 and the lower seal 18 are both O-type rubber seals. A lubrication cavity 17 is arranged between the upper sealing element 15 and the lower sealing element 18, the lubrication cavity 17 is an annular cavity surrounding the valve core 6, the lubrication cavity 17 is surrounded by the upper sealing element 15, the lower sealing element 18, the upper valve cover 5 and the valve core 6, and the lubrication cavity 17 is filled with lubricant which is lubricating oil or lubricating grease. An upper balance diversion hole 16 communicated with the balance diversion conduit 13 is also arranged on the upper valve cover 5.

As shown in fig. 4 and 5, the upper end of the liquid mixer 9 is provided with a connecting pipe connection screw hole arranged along the radial direction. A flow guide cavity 14 is also arranged on the liquid mixer 9, and the flow guide cavity 14 is an arc cavity groove. A liquid mixing cyclone cylinder 10 is fixedly arranged on one side of a foam liquid mixing pipe of the liquid mixer 9, the flow guide cavity 14 is correspondingly positioned on the inner side of the cylinder wall of the liquid mixing cyclone cylinder 10, and the through flow hole on the liquid mixer 9 and the liquid mixing cyclone cylinder 10 are positioned on the same central line. The liquid mixer 9 is also provided with a lower balance diversion hole 19 communicated with the balance diversion pipe 13.

as shown in fig. 6 and 7, the liquid-mixing cyclone 10 includes a cyclone body 101 in a short pipe shape, 8 cyclone guide vanes 102 are evenly distributed on the circumferential direction of the wall of the cyclone body 101, the cyclone guide vanes 102 are in a tile-shaped structure, and the cyclone guide vanes 102 and the wall of the cyclone body 101 are arranged in a cross manner to stir the flowing liquid.

Claims

1. The utility model provides a foam proportional mixing valve, includes liquid mixer (9), this liquid mixer (9) are connected with disk seat (3) through connecting pipe (8), and fixed mounting has lower valve gap (4) on disk seat (3), forms balanced chamber between lower valve gap (4) and the last valve gap (5) of mutual fixed connection, is provided with in this balanced chamber by lower valve gap (4) and the fixed balanced diaphragm (7) of last valve gap (5) centre gripping go up valve gap (5) in the case hole sliding support have case (6), the one end and the balanced diaphragm (7) fixed connection of this case (6), its characterized in that: the valve core (6) is supported in a valve core hole of the upper valve cover (5) in a sliding way through an upper sealing piece (15) and a lower sealing piece (18), and a lubricating cavity (17) is arranged between the upper sealing piece (15) and the lower sealing piece (18); the liquid mixing device (9) is fixedly provided with a liquid mixing cyclone cylinder (10), and a cyclone cylinder guide fin (102) is arranged on a cyclone cylinder body (101) of the liquid mixing cyclone cylinder (10).

2. The foam proportioning valve of claim 1 wherein: the upper sealing piece (15) and the lower sealing piece (18) are embedded on the upper valve cover (5), and the upper sealing piece (15), the lower sealing piece (18), the upper valve cover (5) and the valve core (6) enclose a lubricating cavity (17).

3. The foam proportioning valve of claim 1 or 2 wherein: and lubricating oil or lubricating grease is filled in the lubricating cavity (17).

4. The foam proportioning valve of claim 1 or 2 wherein: the upper sealing element (15) and the lower sealing element (18) are both O-shaped rubber sealing rings.

5. The foam proportioning valve of claim 1 wherein: the liquid mixer (9) is provided with a through hole which is positioned on the same central line with the liquid mixing cyclone cylinder (10).

6. The foam proportioning valve of claim 1 or 5 wherein: the flow guide cavity (14) on the liquid mixer (9) corresponds to the inner side position of the wall of the liquid mixing cyclone cylinder (10).

7. The foam proportioning valve of claim 1 or 5 wherein: the liquid mixing cyclone cylinder (10) comprises a cyclone cylinder body (101) and cyclone cylinder guide vanes (102) fixedly arranged on the cyclone cylinder body (101).

8. The foam proportioning valve of claim 7 wherein: the cyclone cylinder guide vanes (102) and the wall of the cyclone cylinder body (101) are arranged in a mutually crossed manner.

9. The foam proportioning valve of claim 1 wherein: be equipped with the through-flow hole on liquid mixer (9), the one end fixedly connected with fire hose (2) in this through-flow hole, the other end fixedly connected with foam liquid mixing pipe (11) in through-flow hole.

10. The foam proportioning valve of claim 1 wherein: the through-flow hole on the liquid mixer (9) leads to the balance cavity on the upper side of the balance diaphragm (7) through a balance water conduit (13).