CN2275666Y

CN2275666Y - Proportional relief pressure valve

Info

Publication number: CN2275666Y
Application number: CN 96219276
Authority: CN
Inventors: 穆秋池
Original assignee: RONGYANG TECHNOLOGY INST BEIJING
Current assignee: RONGYANG TECHNOLOGY INST BEIJING
Priority date: 1996-09-28
Filing date: 1996-09-28
Publication date: 1998-03-04
Anticipated expiration: 2006-09-28

Abstract

The utility model relates to a proportional pressure relief valve which is composed of a valve body, an inlet flange, an outlet flange, a piston and a sealing ring, wherein the piston is in a step shape, and areas in both ends of the piston are in a fixed proportion, a plurality of water circulating holes are arranged in the circumference of a water inlet end of the piston, a total area of the water circulating holes is little larger than a water inlet area, an inner cavity of the valve body enlarges in the water inlet end of the piston, a water circulating cavity is formed between the valve body and the piston, and a ring bush and a piston bush are arranged in the valve body and are respectively matched with a big end of the piston and a small end of the piston. The utility model has the advantages of stable pressure relief proportion, large flow rate and good sealing property. Dynamic pressure and static pressure are relieved. The utility model can be used for various engineering constructions and network management systems.

Description

Proportion type reducing valve

The utility model relates to a kind of valve.

Along with expanding economy, the tall building in city is more and more.The dividing potential drop water tank is set in the high rise building water supply system usually,, reduces construction investment so that common low pressure hot-water heating parts can bear hydraulic pressure.Pollute but can increase some water like this, can not adapt to people's needs.

The purpose of this utility model is a kind of proportion type reducing valve of design, on the basis of Piston reducing valve, design a kind of novel fixed proportion piston, and enlarge the area of the enterprising water port of piston, this valve is in operation it and not only subtracts dynamic pressure but also subtract static pressure by equilibrium of forces.

For reaching above-mentioned purpose of the present utility model, its technological scheme provides as follows: this valve is made up of valve body, suction flange, outlet(discharge) flange, piston and seal ring, and it is step-like that piston is, and its two ends area becomes fixed proportion; Be provided with some water ports around the piston feed-water end, the water port gross area is bigger than the water intake area, and valve body inner chamber herein increases and piston space formation water flowing chamber; Be provided with ring set and piston sleeve in the valve body, match with big end of piston and small end respectively.

Described water port area is 1.2～1.3 times of water intake area.

Described side face of piston ring is long-pending than being 2: 1, or 3: 1, or 3: 2, or 4: 1.

Described piston, ring set and piston sleeve adopt the tin bronze material, and valve body adopts cast iron.

The working principle of the utility model proportion type reducing valve is: utilize the pressure difference that floating piston two ends different cross-sectional causes in the valve body to change downstream pressure, the area difference that piston is imported and exported two ends constitutes before the valve and the pressure difference behind the valve, area differs into fixed proportion, before the valve with valve after pressure differ and also become fixed proportion, because the water port area increases than the water intake area on the piston, thereby the resistance drop that is subjected to when water is flowed in valve body is to minimum, thereby flow is big, and flow does not significantly change because of variation in pressure.

By as seen above-mentioned, the utility model has the advantages that:

1. decompression ratio is stable, not only can subtract dynamic pressure but also can subtract static pressure.

2. flow is big, and good seal can be simplified water system.

3. switch is steady, noiseless, and volume is little, in light weight.

4. mounting type is not limit, but both the level installation also can vertically be installed.

5. the harmful matter that do not produce in service, is not corroded non-scaling.

Novel structure, rationally, simple, cost is lower.

7. applied widely, can be used in various engineering constructions and the network management system, as high rise building water supply system, fire-fighting system etc.

Below in conjunction with drawings and Examples, further specify the utility model.

Fig. 1 is a kind of embodiment's of proportion type reducing valve a sectional view;

Fig. 2 is an another kind of embodiment's of the present utility model sectional view.

Fig. 1 illustrates structure of the present utility model, with reference to Fig. 1, the utility model reduction valve mainly is made up of valve body 6, suction flange 13, outlet(discharge) flange 5 and floating piston 12, piston sleeve 10, ring set 8 and seal ring 7,9,11, its design difference is that piston 12 is step-like, water outlet 121 areas are big, water intake 122 areas are little, and both become fixed proportion, and ratio commonly used is 2: 1,3: 1,3: 2 or 4: 1.Piston 12 is provided with several uniform water ports 123, and the water port gross area is generally 1.2～1.3 times of water intake 122 areas; Form a water flowing chamber 20 between valve body 6 and the piston 12, drive fit has ring set 8 and piston sleeve 10 in the valve body 6; Be provided with seal ring 9,11 with ring set 8, piston sleeve 10 places on the piston 12.

When water flows into this valve, promote floating piston 12 left, water enters water flowing chamber 20, flows in the piston 12 from each water port 123 then, flows to water outlet 121.

Valve body 6 adopts cast iron, piston 12, and piston sleeve 10 and ring set 8 adopt tin bronze, and the former is cheap, latter's resistant to rust, the junction plane place needs fine finishing, but area is little, and cost reduces relatively.

Figure 1 shows that intake-outlet is that internal thread connects, Figure 2 shows that intake-outlet is that flange connects, the water port is a long-round-shape, designs identical with working principle.

Claims

1, a kind of proportion type reducing valve is made up of valve body, suction flange, outlet(discharge) flange, piston and seal ring, it is characterized in that piston is step-like, and its two ends area becomes fixed proportion; Be provided with some water ports around the piston feed-water end, the water port gross area is bigger than the water intake area, and valve body inner chamber herein increases and piston space formation water flowing chamber; Be provided with ring set and piston sleeve in the valve body, match with big end of piston and small end respectively.

2, proportion type reducing valve according to claim 1 is characterized in that described water port area is 1.2～1.3 times of water intake area.

3, proportion type reducing valve according to claim 1 is characterized in that described side face of piston ring is long-pending than being 2: 1, or 3: 1, or 3: 2, or 4: 1.

4, proportion type reducing valve according to claim 1 is characterized in that described piston, ring set and piston sleeve adopt the tin bronze material, and valve body adopts cast iron.