CN2318472Y

CN2318472Y - Micro-block slow-close butterfly check valve

Info

Publication number: CN2318472Y
Application number: CN 97227548
Authority: CN
Inventors: 钱克
Original assignee: Liaoyang City Hongyu Valve Factory
Current assignee: Liaoyang City Hongyu Valve Factory
Priority date: 1997-10-09
Filing date: 1997-10-09
Publication date: 1999-05-12
Anticipated expiration: 2007-10-09

Abstract

The utility model relates to a micro-block slow-close butterfly check valve which is suitable for water supply and drainage engineering in the technical fields of the petroleum, the chemical engineering, the thermal power, the metallurgy, etc. The valve is composed of a slow-close mechanism 2 which is arranged under the inner part of a tubular valve body 1, a butterfly plate component 3 which is inlaid with a movable sealing rubber ring 6, a valve shaft 4 which is arranged on the position which is deviated from the 1/4 of the center of the valve body, a slinger ring 5 which is arranged on the outer top of the valve body 1, a valve seat 8 which is arranged on the lower part of the valve body 1, a micro regulating valve 7 and a one-way valve 9. The valve shaft 4 is connected with the position through a shaft arm which is arranged on the butterfly plate component 3, and the micro regulating valve 7 and the one-way valve 9 are respectively arranged on the both sides of the valve body. The valve has the advantages of small size, large flow rate, little resistance, good energy saving, flexible opening and closing of the butterfly plate component and the good sealing effect.

Description

The micro-resistance slowly-closed butterfly check valve

The utility model relates to a kind of fields such as oil, chemical industry, thermoelectricity, metallurgy, micro-resistance slowly-closed butterfly check valve of the required usefulness of water supply and sewage work of being applicable to.

Before the utility model, its patent No. is 8620915-6, and the patented product of " Tiny Drag Slow Shut Check Valves " by name was once applied at home.Through operation for many years, reliable performance, power savings are also good.But the user is generally reflected, should exist many deficiencys.For example, the volume of this valve is bigger, and heaviness is manufactured the expense material of taking a lot of work, the cost height, and the construction and installation difficulty, valve distinguishes that being located at the valve shaft upper end hangs, and rotary arm is big, and resistance is also quite big.

Technical solution of the present utility model is that existing 8620915-6 number Tiny Drag Slow Shut Check Valves is improved.Its specific practice is, removes the valve gap in the original structure, balancing pole, and parts such as counterweight, the type shape that changes valve body dwindles the volume of valve body like tubular type; Be the convenience of installing, suspension ring have been set up at the top outside valve body, have set up demountable valve seat in the bottom; Leak for reliable, the nothing that guarantee sealability, the design angle of valve body inner sealing surface is 15 °, and adopts H ₆₂The material of (copper or Cuprum alloy), anticorrosion antiwear; The butterfly plate component design is circular, and is installed with sealing rubber ring alive, by of the armshaft on the butterfly plate assembly be located at the valve shaft that departs from 1/4 place, valve body center and be connected, make the open and close moment of butterfly plate assembly very little, impact of water hammer power balances 1/3 mutually.

Micro-resistance slowly-closed butterfly check valve of the present utility model is compared with the special kind of product of the 8620915-6 " Tiny Drag Slow Shut Check Valves " of prior art, and it is original 1/3 that its structure length has only, and reduces by 1/2 highly relatively, it is little to have volume, in light weight, and flow is big, the characteristics that resistance is little are manufactured saving of labor, laborsaving, material-saving, and cost is low, it is short that gyration time is opened, opened in economize on electricity, good energy-conserving effect, butterfly plate assembly, open and close flexibly, good sealing effect, shockproof, noise free.

For structure and principle to micro-resistance slowly-closed butterfly check valve of the present utility model have further understanding, details are as follows in conjunction with a specific embodiment of the present utility model:

Embodiment, the micro-resistance slowly-closed butterfly check valve.

Accompanying drawing 1 is the structural representation of micro-resistance slowly-closed butterfly check valve.

Accompanying drawing 2 is the left view of accompanying drawing 1.

With reference to accompanying drawing, the structure of micro-resistance slowly-closed butterfly swing check valve of the present utility model includes by among the figure Like the valve body 1 of circular tube shaped, the Slow Close mechanism 2 that valve body 1 interior below is provided with is provided with in valve body 1 Insert the butterfly plate assembly 3 of the sealing rubber ring 6 of living, by departing from that the armshaft sub-connection above it The valve shaft 4 that 1/4 place, valve body center is provided with, suspension ring 5, bottom that valve body 1 outer top is provided with are provided with removable The valve seat 8 that unloads, and the Mini-adjustable valve 7 and the check valve 9 that are respectively equipped with in valve body 1 both sides form.

Wherein the sealing surface design angle in the valve body 1 is 15 °, and adopts H₆₂(copper or copper alloy) Material. Butterfly plate assembly 3 is with being with fluted circular butterfly plate on armshaft and the edge by a side Be provided with the hollow round pressing plate of the groove that matches with round butterfly plate with an edge, by interior hexagonal spiral shell Tying the sealing rubber ring alive 6 that connects insert in the two plates compression groove consists of.

The principle of this micro-resistance slowly-closed butterfly check valve is that by the kinetic head effect of import medium, butterfly plate assembly 3 is opened automatically medium is passed through.Press water in the valve body 1 flows to the piston back cavity of Slow Close mechanism 2 by one-way valve 9, and piston is released in piston cavity.When current stop (out of service suddenly), because the deadweight of butterfly plate assembly 3 and the effect of refluence water are closed the butterfly plate assembly automatically as water pump.Withstand the butterfly plate assembly because the piston of Slow Close mechanism 2 is in the promotion position, make butterfly plate assembly 3 the valve port Close All also can not be remained the unlatching sectional area that has about 20%, current are passed through, weakened water hammer pressure.

Butterfly plate assembly 3 is pressed in the pistons end of Slow Close mechanism 2, the water resistance of piston back cavity hinders piston to be return, and also stops the butterfly plate assembly to be closed, and this strand water can't be let out back valve body 1 from one-way valve 9, can only slowly flow back to valve body 1 by micro-modulating valve 7, butterfly plate assembly 3 is slowly closed.

The butterfly plate assembly is divided into fast and slow two steps close, and has reached not only anti-adverse current but also has weakened the effect of water hammer.

Technical parameter:

1, the Slow Close time: guarantee in 60 seconds;

2, water hammer peak value: nominal pressure is in 1.2 times;

3, strength test: 1.5 times of nominal pressure.

4, adaptive temperature :-10 ℃-85 ℃;

5, adapt to pressure: 10,16MPa;

6, adapt to medium: clear water, Yuan Shui, sewage, seawater, oil etc.;

When 7, medium flow backwards, water pump reversing speed was no more than 1/3 times of rated speed.

Claims

1, a kind of micro-resistance slowly-closed butterfly check valve, it includes valve body [1], Slow Close mechanism [2], butterfly plate assembly [3], valve shaft [4], micro-modulating valve [7], one-way valve [9], it is characterized in that it also includes the suspension ring [5] that the top outside valve body [4] is provided with, the sealing rubber ring alive [6] that studs with on the butterfly plate assembly [3], and dismountable valve seat [8] that valve body [1] outer bottom is provided with is formed.

2, a kind of micro-resistance slowly-closed butterfly check valve according to claim 1, the external form that it is characterized in that valve body [1] is like the pipe shape, and the sealing surface angle in the valve body is 15 °, and its material is H ₆₂(copper or Cuprum alloy).

3, a kind of micro-resistance slowly-closed butterfly check valve according to claim 1, it is characterized in that butterfly plate assembly [3] is to have the hollow circular pressing plate that the circular butterfly plate that has groove on armshaft and the edge and an edge are provided with the groove that matches with round butterfly plate by a side, connect the sealing rubber ring alive [6] that two plates compress insert in the groove by hexagon socket head cap screw and constitute.

4, a kind of micro-resistance slowly-closed butterfly check valve according to claim 1 is characterized in that valve shaft [4] is located at 1/4 place that departs from valve body [1] center.