CN201783114U

CN201783114U - Balanced proportioning device

Info

Publication number: CN201783114U
Application number: CN2010205381223U
Authority: CN
Inventors: 陈秀玉; 黄亚树; 王日升
Original assignee: FUJIAN TIANGUANG FIRE-FIGHTING SCIE-TECH Inc Co
Current assignee: Tianguang Fire Fighting Co.,Ltd.
Priority date: 2010-09-16
Filing date: 2010-09-16
Publication date: 2011-04-06
Anticipated expiration: 2020-09-16

Abstract

The utility model discloses a balanced foam proportioning device, including an atmospheric pressure foam concentrate storage tank, an electric stop valve, a foam pump, a relief valve, a balance valve and a proportioner; the atmospheric pressure foam concentrate storage tank is connected with the electric stop valve and the foam pump in order and is connected to one end of a main pipeline; the other end of the main pipeline is connected with a foam input port of the proportioner; the relief valve and the balance valve are connected on the main pipeline in order along the flow direction of the foam concentrate; a liquid inlet of the balance valve is communicated with the main pipeline through a branch pipeline; a liquid outlet is communicated with a return pipeline via a check valve; a pipeline is connected at an adjusting port of the balance valve; and the pipeline is communicated with the adjusting port on the proportioner. In the utility model, the balance valve and the relief valve are installed in a bypass way so as to realize an accurate mixture ratio of the foam mixture in a certain flow range and solve the problem that the fire extinguishing efficiency of the whole system is influenced by an accident failure of the balance valve in the conventional foam proportioning device.

Description

A kind of balanced type proportion mixing device

Technical field

The utility model belongs to the fire plant field, specifically is meant a kind of balanced type proportion mixing device.

Background technology

The balanced type foam proportioning unit is a kind of novel foam extinguishing device that provides to foam fire fighting system, and it mainly is applicable to the big-and-middle-sized foam fire fighting system in the important place such as tank field, harbour, airport, offshore oil platform of large-scale petroleum chemical industry.

Existing a kind of balanced type foam proportioning unit, as shown in Figure 1, mainly comprise normal pressure foam liquid tank 1 ', electric check valve 2 ', foam pump 3 ', relief valve 4 ', balanced valve 5, proportioner 6 '.Normal pressure foam liquid tank 1 ' successively and electric check valve 2 ' and foam pump 3 ' link to each other, be connected to again trunk line 8 ' an end, trunk line 8 ' the other end and proportioner 6 ' the foam input port link to each other; The motor 31 of its work of foam pump 3 ' also be connected with control '; Proportioner 6 ' left port be the entry port, be used to connect the delivery port of water pump, its right output port is an output port, is used to connect foam jet equipment, proportioner 6 ' on also be provided with an adjusting port that communicates with its entry port; Trunk line 8 ' on along the flow direction of foam solution also be connected with in turn relief valve 4 ' and balanced valve 5 '; Relief valve 4 ' an end by a branch pipe(tube) 41 ' with trunk line 8 ' be communicated with, the other end by a reflux line 42 ' time be connected to normal pressure foam liquid tank 1 '; Balanced valve 5 ' inlet and liquid outlet all be connected trunk line 8 ' on, and balanced valve 5 ' the adjusting port also pick out a pipeline 9 ', this pipeline 9 ' be connected to proportioner 6 ' the adjusting port on.

During enforcement, start earlier fire pump, the press water in the water pump from proportioner 6 ' the entry port flow into; At this moment, unlatching electric check valve 2 ', by motor 31 ' manipulation foam pump 3 ' startup, the foam solution that is stored in normal pressure foam liquid tank 1 ' interior via foam pump 3 ' flow to trunk line 8 ', and through bypass relief valve 4 ' pressure release effect, straight-through balanced valve 5 ' the balance adjustment effect, last an amount of foam solution enter proportioner 6 ' in, and be mixed into foam mixing liquid in proportion with press water, from output port this foam mixing liquid is delivered to foam jet equipment again.

Yet, above-mentioned balanced valve 5 ' relative trunk line 8 ' be through type, its spool transfers opening to from closed condition and flows through for foam solution during work, and the foam pressure of trunk line 8 ' interior is bigger, balanced valve 5 in the work ' continue the to be in bigger state of pressure, so cause balanced valve 5 ' interior mechanisms such as spool to be prone to damage easily, regulate situations such as not accurate, so just can not get guaranteeing in the accurate mixing ratio of certain flow scope inner foam mixed liquor; And, the balanced valve of existing through type is after accident breaks down, and balanced valve just is in closed condition, trunk line 8 ' interior foam solution can not enter proportioner 6 ', thereby proportioner 6 ' interior output will be water and do not have foam entirely, so do not have the effect of fire extinguishing.

In view of this, the inventor is existing to be furtherd investigate the structure of balanced type foam proportioning unit, and this case produces thus.

The utility model content

The purpose of this utility model is to provide a kind of balanced type foam proportioning unit, its balanced valve and relief valve all adopt bypass type to install, realized accurate mixing ratio, solved the problem that has influence on whole system fire extinguishing effect after balanced valve accident in the existing foam proportioning unit breaks down at certain flow scope inner foam mixed liquor.

In order to reach above-mentioned purpose, solution of the present utility model is:

A kind of balanced type foam proportioning unit comprises normal pressure foam liquid tank, electric check valve, foam pump, relief valve, balanced valve and proportioner; This normal pressure foam liquid tank links to each other with above-mentioned electric check valve, foam pump successively, is connected to an end of trunk line again, and the other end of trunk line links to each other with the foam input port of aforementioned proportion blender; The flow direction along foam solution on above-mentioned trunk line also is connected with above-mentioned relief valve and balanced valve in turn; One end of this relief valve is communicated with above-mentioned trunk line by a branch pipe(tube), and the other end returns by a reflux line and is connected to above-mentioned normal pressure foam liquid tank; Wherein, the inlet of above-mentioned balanced valve is communicated with above-mentioned trunk line by a branch pipe(tube), liquid outlet is communicated with above-mentioned reflux line via a check valve, and the adjusting port of above-mentioned balanced valve also picks out a pipeline, and this pipeline communicates with the adjusting port of aforementioned proportion blender.

After adopting said structure, the utility model balanced valve is that vertical bypass is connected with trunk line, foam solution is gone forward side by side from foam pump output behind the trunk line, pressure release effect through relief valve, obtain constant foam solution, this constant foam solution continues to move ahead along trunk line, balanced valve via the bypass connection, the adjusting port of this balanced valve communicates with the adjusting port of proportioner, the inlet of this balanced valve is communicated with trunk line, the upper cavity in this balanced valve then, lower chamber links to each other with foam solution pressure with fire water respectively, at fire water pressure, during changes in flow rate, the pressure of foam solution and flow are along with change, so make the mixed liquor that enters in the proportioner satisfy the mixed proportion of design all the time.

Especially, its balanced valve of the present utility model and relief valve all adopt bypass type to install, can realize the pressure balance of fire water and foam solution, and balanced valve is located on the bypass branch pipe(tube), the foam solution pressure that is born in it is little, mechanisms such as its inner spool are just not fragile, and degree of regulation is accurate, has guaranteed the accurate mixing ratio at certain flow scope inner foam mixed liquor; And even the balanced valve accident breaks down after the problem, whole system still can operate as normal, and the foam solution in the trunk line still can flow to proportioner, just with the mixing ratio of press water deviation to some extent, but still can play the effect of fire extinguishing.

Description of drawings

Fig. 1 is the structural representation of existing balanced type foam proportioning unit;

Fig. 2 is the structural representation of the utility model balanced type foam proportioning unit.

Label declaration

Normal pressure foam liquid tank 1 ' electric check valve 2 '

Foam pump 3 ' motor 31 '

Relief valve 4 ' branch pipe(tube) 41 '

Reflux line 42 ' balanced valve 5 '

Proportioner 6 ' frame 7 '

Trunk line 8 ' pipeline 9 '

Normal pressure foam liquid tank 1 electric check valve 2

Foam pump 3 motors 31

Relief valve 4 branch pipe(tube)s 41

Reflux line 42 balanced valves 5

Branch pipe(tube) 51 check valves 52

Proportioner 6 entry ports 61

Output port 62 is regulated port 63

Frame 7 trunk lines 8

Pipeline 9

The specific embodiment

In order further to explain the technical solution of the utility model, the utility model is elaborated below by specific embodiment.

A kind of balanced type foam proportioning unit as shown in Figure 2 comprises normal pressure foam liquid tank 1, electric check valve 2, foam pump 3, relief valve 4, balanced valve 5 and proportioner 6, all is erected on the frame 7.Also set up motor 31 on the above-mentioned frame 7, this motor 31 is connected with foam pump 3, is used to handle foam pump 3 work.

Still can work in order to make described foam pump 3 unusual back mixing arrangement occur, electric check valve 2 of the present utility model, foam pump 3 and motor 31 are provided with two groups, drawing the two-way pipeline by normal pressure foam liquid tank 1 links to each other with electric check valve 1, foam pump 3 respectively successively, be connected to an end of trunk line 8 more jointly, the other end of trunk line 8 links to each other with the foam input port of aforementioned proportion blender 6.The left port of proportioner 6 is an entry port 61, is used to connect the delivery port of water pump, and its right output port is an output port 62, is used to connect foam jet equipment, also is provided with an adjusting port 63 that communicates with described entry port 61 on the proportioner 6.In order to prevent that the foam solution in the trunk line is back to foam pump and causes that foam pump is overheated, respectively be provided with a check valve in two foam pump 3 and 8 of trunk lines.

The flow direction along foam solution on the trunk line 8 also is connected with relief valve 4 and balanced valve 5 in turn.One end of this relief valve 4 is communicated with trunk line 8 by a branch pipe(tube) 41, and the other end is connected to above-mentioned normal pressure foam liquid tank 1 for 42 times by a reflux line.

Especially, in the utility model, balanced valve 5 and trunk line 8 are connected for vertical bypass type, and the inlet of its lower chambers correspondence is communicated with trunk line 8 by a branch pipe(tube) 51, liquid outlet is communicated with reflux line 42 via a check valve 52, and this check valve 52 can prevent the effect of foam solution reverse reflux.Adjusting port in upper chamber's correspondence of balanced valve 5 also need pick out a pipeline 9, this pipeline 9 is connected on the adjusting port 63 of proportioner 6, then upper cavity, the lower chambers in the balanced valve 5 links to each other with foam solution pressure with fire water respectively, thereby can realize the balance adjustment effect of balanced valve 5.

After adopting said structure, in the utility model, foam solution is gone forward side by side from foam pump 3 outputs behind the trunk line 8, through the relief valve 4 of bypass, relief valve 4 is used to control the pressure of foam solution, and is set with constant operating pressure, when the pressure of foam pump 3 outputs exceeds setting pressure, relief valve 3 is opened, and allows the excess foam liquid that causes overvoltage via relief valve 3 and reflux line 42, flows to normal pressure foam liquid tank 1.Constant foam solution continues to move ahead along trunk line 8, balanced valve 5 via the bypass connection, because upper cavity, lower chamber in this balanced valve 5 link to each other with foam solution pressure with fire water respectively, when fire water pressure, changes in flow rate, the pressure of the foam solution in the trunk line 8 and flow are along with change, so make the mixed liquor that enters in the proportioner 6 satisfy the mixed proportion of design all the time, balanced valve 5 has played the effect of balance adjustment, and unnecessary foam solution flow to reflux line 42 via check valve 52, finally flows to normal pressure foam liquid tank 1.

The utility model innovative point is: balanced valve 5 vertically is located on the bypass branch pipe(tube) 51, foam solution pressure in the branch pipe(tube) 51 is little, then the foam solution pressure that is born in the balanced valve 5 is little, thereby the mechanisms such as spool of balanced valve 5 inside are just not fragile, influence to the balanced valve degree of regulation is also just smaller, therefore, the utility model balanced valve 5 and relief valve 4 all adopt the mounting means of bypass type, not only realize the pressure balance of fire water and foam solution, and guaranteed in certain flow scope inner foam mixed liquor mixing ratio more accurately; Especially, the problem even balanced valve 5 or relief valve 4 accidents break down, whole fire extinguishing system still can operate as normal, and the foam solutions in the trunk line 8 still can flow to proportioner 6, just with the mixing ratio of press water deviation to some extent, but still can play the effect of putting out a fire preferably.

The foregoing description and graphic and non-limiting product form of the present utility model and style to its suitable variation or modification of doing, all should be considered as not breaking away from patent category of the present utility model.

Claims

1. a balanced type foam proportioning unit comprises normal pressure foam liquid tank, electric check valve, foam pump, relief valve, balanced valve and proportioner; This normal pressure foam liquid tank links to each other with above-mentioned electric check valve, foam pump successively, is connected to an end of trunk line again, and the other end of trunk line links to each other with the foam input port of aforementioned proportion blender; The flow direction along foam solution on above-mentioned trunk line also is connected with above-mentioned relief valve and balanced valve in turn; One end of this relief valve is communicated with above-mentioned trunk line by a branch pipe(tube), and the other end returns by a reflux line and is connected to above-mentioned normal pressure foam liquid tank; It is characterized in that: the inlet of above-mentioned balanced valve is communicated with above-mentioned trunk line by a branch pipe(tube), liquid outlet is communicated with above-mentioned reflux line via a check valve, the adjusting port of above-mentioned balanced valve also picks out a pipeline, and this pipeline communicates with the adjusting port of aforementioned proportion blender.