CN2674230Y

CN2674230Y - Multi-functional, energy-saving unloading check-valve

Info

Publication number: CN2674230Y
Application number: CN 200420016961
Authority: CN
Inventors: 李习洪
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-01-13
Filing date: 2004-01-13
Publication date: 2005-01-26
Anticipated expiration: 2014-01-13

Abstract

The utility model discloses a multi-functional, energy-saving unloading check-valve, which comprising a valve body. An axis is provided in the valve body, and a valve flap is hinged on the axis, and a valve rod is also provided in the valve body. A pressure relief hole is provided on a valve plate, and a small valve base is provided on the pressure relief hole, and a guide sleeve is provided on the valve plate besides the pressure relief hole, and a small valve flap which is in contact seal with the small valve base is provided in the guide sleeve. The small valve flap is hinged with a connecting rod, and the other end of the connecting rod is hinged with the lower end of the valve rod, and the upper segment of the valve rod is connected with a two-chamber control device. The check valve is installed on a pipe network, and can replace the prior check valve and electrical control valve, and the utility model of check-valve realizes the generation of a water hammer when a pump is closed, and the starting under load of the pump. Meanwhile, the valve body is a straight-way type, so almost no water can be lost in use; meanwhile, a king valve plate is provided with the pressure relief hole and the valve flap, after the king valve plate is quickly closed, the reflux water pressure can be relieved from the pressure relief hole through the slow closure of the small valve flap, accordingly, the impact of the water hammer can be reduced. In addition, the connecting rod connected on the valve plate solves the problem in the prior check valve that the valve flap shakes after the check valve is opened.

Description

Multifunction energy-saving unloading safety check

Technical field

The utility model belongs to the control valve on the water supply network, is specifically related to a kind of unloading safety check.

Background technique

Be to prevent the generation of pump water hammer when closing and the starting under load of pump at present on the water supply network, the general employing at delivery side of pump connects a safety check and a motor-operated control valve, arranges that like this valve is many, connection is many, the engineering construction amount is big, has high input, and control is complicated.Existing a kind of two-chamber control multifunction valve can replace above-mentioned two valves, but this valve when using damage by water bigger, cause a large amount of energy losses.Existing safety check all can produce the impact of water hammer to valve plate after quick closedown.

Summary of the invention

The purpose of this utility model is to provide a kind of multifunction energy-saving unloading safety check, to overcome the defective that above-mentioned valve uses, installs.

The technical solution of the utility model is: multifunction energy-saving unloading safety check comprises valve body, the axle of establishing in the valve body, hinged flap on the axle is also established valve rod in the valve body, offer pressure relief vent on the valve plate, establish little valve seat on the pressure relief vent, establish guide sleeve in that pressure relief vent is other on the valve plate, establish the little flap with little valve seat contact seal in the guide sleeve, little flap and rod hinge connection, the other end of connecting rod and valve rod lower end are hinged, and the valve rod epimere is connected with the two-chamber control gear.

This safety check mounting pipe can replace safety check and motor-operated control valve on the net, realize the generation of pump water hammer when closing and the starting under load of pump, simultaneously because valve body is a straight-through type, substantially there is not damage by water during use, simultaneously, owing to offer pressure relief vent and little flap on the main valve plate, after the quick closedown of main valve plate, the hydraulic pressure that refluxes can be closed from pressure relief vent slowly by little flap and be laid down, thereby reduces the impact of water hammer; In addition, connect connecting rod on the valve plate, thereby solved the problem that existing safety check is opened back flap shake.

Description of drawings

Fig. 1 two-chamber barrier film control multifunction energy-saving unloading check valve structure schematic representation

Fig. 2 piston type control multifunction energy-saving unloading check valve structure schematic representation

Embodiment

As shown in Figure 1, connect connecting base 2 on the valve body 1, the two-chamber control gear is connected with connecting base 2.The two-chamber control gear comprises interconnective upper and lower covers 3,4, all offers control hole 20,21 on the upper and lower covers 3,4.Connect barrier film 5 in the upper and lower covers 3,4, form cavity of resorption 6 between barrier film 5 and the lower cover 4, form epicoele 7 between barrier film 5 and the loam cake 3.Valve rod 8 epimeres pass upper and lower covers 3,4 and sealing with it, and valve rod 8 is connected with barrier film 5.Coupling shaft 11 in the valve body 1, axle 11 hinged rocking bars 12, rocking bar 12 is connected with main valve clack 10.Offer pressure relief vent 25 on the main valve plate 10, establish little valve seat 24 on the pressure relief vent 25, establish guide sleeve 22 on pressure relief vent 25 sides on the main valve plate 10, establish little flap 23 in the guide sleeve 22 with little valve seat 24 contact seals, little flap 23 is hinged with connecting rod 9, and the other end of connecting rod 9 and valve rod 8 lower ends are hinged.

Offer pod apertures

15,16 on valve body 1 inlet segment 13 and/or the water exit end 14.Axle 11 passes valve body 1 and sealing with it, passes coupling shaft control device for pivoting on the axle 11 of valve body 1.The axle control device for pivoting comprises and axle 11 connecting rods that are connected 17 that the other end of connecting rod 17 connects weight 18.Connecting rod 17, weight 18 are the dotted portion among the figure.The axle control device for pivoting is not limited to said structure, so long as can help flap 10 quick closedowns to get final product.

As shown in Figure 2, except that the structure of two-chamber control gear with above-mentioned different, other structures are same as described above, other structures are not repeated.The two-chamber control gear comprises the piston/cylinder 30 that is connected with connecting base 2, connects upper end cap 31 on the piston/cylinder 30, and valve rod 8

passes end cap

31,32 and sealing up and down with it; Piston/cylinder 30 hypomeres are offered pod apertures 32, offer pod apertures 34 on the upper end cap 31, establish piston 33 in the piston/cylinder 30 and are connected with valve rod 8.

The working principle of this valve is: during opening of valves, flap 10 is slowly opened under the control of the effect of hydraulic pressure and two-chamber, makes the pump on-load, and the inlet segment of opening rear valve body leads directly to water exit end; When closing, flap 10 under the effect of weight, quick closedown, little flap 23 is slowly closed under the effect of the valve rod of the control of two-chamber and connecting rod, lays down the hydraulic pressure of backflow down, thereby reduces the impact of water hammer.

Claims

1, a kind of multifunction energy-saving unloading safety check, it comprises valve body, the axle of establishing in the valve body, hinged main valve clack on the axle, also establish valve rod in the valve body, it is characterized in that offering pressure relief vent on the main valve plate, establish little valve seat on the pressure relief vent, establish guide sleeve on the pressure relief vent side on the main valve plate, establish little flap in the guide sleeve with little valve seat contact seal, little flap and rod hinge connection, the other end of connecting rod and valve rod lower end are hinged, and the valve rod epimere is connected with the two-chamber control gear.

2, multifunction energy-saving unloads safety check according to claim 1, it is characterized in that described two-chamber control gear is a two-chamber barrier film control gear.

3, multifunction energy-saving unloads safety check according to claim 1, it is characterized in that described two-chamber control gear is a piston controller.

4, as multifunction energy-saving unloading safety check as described in claim 2 or 3, it is characterized in that piston controller or two-chamber barrier film control gear are connected to valve body.

5, multifunction energy-saving unloads safety check according to claim 1, it is characterized in that described axle passes valve body, and the axle that passes valve body is gone up the coupling shaft control device for pivoting.

6, multifunction energy-saving unloads safety check according to claim 1, it is characterized in that the connecting rod that described axle control device for pivoting comprises and axle is connected, and the other end of connecting rod connects weight.

7, multifunction energy-saving safety check according to claim 1 is characterized in that offering pod apertures on the inlet segment of valve body and/or the water exit end.