CN200965082Y

CN200965082Y - Check valve with antifouling drainer

Info

Publication number: CN200965082Y
Application number: CN 200620043288
Authority: CN
Inventors: 季能平
Original assignee: SHANGHAI SHANGLONG VALVE FACTORY
Current assignee: SHANGHAI SHANGLONG VALVE FACTORY
Priority date: 2006-06-27
Filing date: 2006-06-27
Publication date: 2007-10-24
Anticipated expiration: 2016-06-27

Abstract

The utility model discloses a check valve with a sewage-proof drainer, which essentially consists of a main valve which consists of a valve body, a fixed sleeve, a longitudinal reinforcing plate, a first-grade sealing device, a second-grade sealing device and a connecting rod. The utility model is characterized in that the middle section at the bottom of the main valve is provided with a sewage-proof drainer by a connecting pipe; the sewage-proof drainer consists of a valve cover, a rubber septum piece, a valve flap, a valve body, a valve seat, a short pipe and a connecting pipe; an upper pressure chamber is formed between the valve cover and the rubber septum piece of the sewage-proof drainer; a lower pressure chamber is formed between the valve body and the rubber septum piece which is linked with the valve flap. The utility model has sound structure and smart concept, can automatically induce the internal leakage of the upper valve body, and start the drainage; the utility model is an external hanging type, does not occupy the space of flow path, and has small resistance and generalization value.

Description

The safety check that has anti-soil draining equipment

Technical field:

The utility model relates to a kind of valve, particularly relates to the safety check that has anti-soil draining equipment.

Background technique:

Existing safety check, defective is: once seal failure, the medium of getting dirty can flow to inducer from the outlet section of valve body, makes inducer water quality contaminated, thereby causes valve in whole opening process, and fluid resistance increases.

Summary of the invention:

Technical problem to be solved in the utility model provides and a kind ofly can effectively overcome above-mentioned defective, the little safety check that has anti-soil draining equipment of fluid resistance in the whole opening process of valve.The technological scheme that its technical problem that solves the utility model adopts is, a kind of safety check that has anti-soil draining equipment, mainly form by main valve, main valve is made up of valve body, fixed cover, vertical gusset, first order seal arrangement, second level seal arrangement and connecting rod, first order seal arrangement is arranged at the inducer of valve body, form by the flap that is fixed in the valve seat on the valve body and be arranged in the valve body fixed cover, between flap and valve body fixed cover, form control chamber, communicate with outlet section, and softer single spring is set; Second level seal arrangement is arranged at the outlet section of valve body, form by the valve seat that is arranged at the flap in the valve body and be fixed on the valve body, it is characterized in that: the intermediate section of the bottom of main valve is provided with anti-soil draining equipment by adapter, and anti-soil draining equipment is made up of valve gap, diaphragm of rubber sheet, flap, valve body, valve seat, short tube, adapter; Form the upward pressure chamber between the valve gap of anti-soil draining equipment and the diaphragm of rubber sheet, form the downforce chamber between valve body and the diaphragm of rubber sheet, diaphragm of rubber sheet and flap interlock.Owing to adopt such scheme, be not difficult that it is rational in infrastructure to draw the utility model, be skillfully constructed, once top valve body generation internal leakage, it can be responded to automatically, opening water discharge, and it is external hanging type, does not take flow channel space, resistance is little, the tool promotional value.

Description of drawings:

Below in conjunction with drawings and Examples the utility model is described in further detail.

Accompanying drawing is a structural representation of the present utility model.

Embodiment:

Referring to accompanying drawing, structure of the present utility model is made up of sealing arrangement in two stages main valve 1, anti-soil draining equipment 2 two-part; Sealing arrangement in two stages main valve 1 is made up of parts such as valve body 7, fixed cover 8, vertical gusset 9, first order seal arrangement 3, second level seal arrangement 4, connecting rod 6 and Returnning springs 5; Fixed cover 8 is arranged at valve body 7 middle parts, supports with vertical gusset 9, and with valve body 7 cast solids, periphery forms annular runner, and inside is control chamber;

First order seal arrangement 3 is arranged at the inducer of valve body 7, is made up of the flap 31 that is fixed in the valve seat 32 on the valve body and be arranged in the valve body fixed cover 8; Between flap 31 and valve body fixed cover 8, form control chamber, communicate, and softer single spring 5 is set is used for two flaps and resets, overcome the frictional force that resets with outlet section, and main valve when opening resistance less.

Second level seal arrangement 4 is arranged at the outlet section of valve body 7, is made up of the valve seat 41 that is arranged at the flap 42 in the valve body and be fixed on the valve body, and the runner of valve body 7 is divided into inducer, intermediate section and outlet section, the runner employing uniform section and the streamline form of valve body 7.

Connect with connecting rod 6 between the flap 31 of first order seal arrangement and the flap 42 of second level seal arrangement, the flap of two-stage and valve base sealing power are all responded to outlet section pressure and are realized that sealing force is bigger, seals more reliable.The runner of the form of this two-stage seal arrangement and valve body 7 is complementary, and when making the main valve standard-sized sheet, whole runner is prismatic streamline form, and the current vortex is less, and flow resistance is little.

Anti-soil draining equipment 2 is made up of parts such as valve gap 21, diaphragm of rubber sheet 22, flap 23, valve body 26, valve seat 27, short tube 24, adapters 25; Form the upward pressure chamber between the valve gap 21 of anti-soil draining equipment and the diaphragm of rubber sheet 22, be communicated with the inducer of main valve; Form the downforce chamber between valve body 26 and the diaphragm of rubber sheet 22, be communicated with the main valve intermediate section by taking over 25; Diaphragm of rubber sheet 22 and flap 23 interlocks, when the pressure in the pressure chamber is greater than the upward pressure cavity pressure instantly, drives flap 23 and separate, the water in the downforce chamber is drained into outside the valve with valve seat 27, when pressure in pressure cavity is less than or equal to the upward pressure cavity pressure instantly, drives flap 23 and close automatically.

Because two seal arrangement sealings are reliable, even sealing is damaged, its Leckage is also less, so the volume and the runner of anti-soil draining equipment 2 are all less, and being arranged at the outer side surface of main valve 1, the current that do not influence main valve are current, also can be according to the installation position of main valve, be adjusted to plumbness arbitrarily, by short tube 24 downward diversions.

Claims

1, a kind of safety check that has anti-soil draining equipment, mainly form by main valve, main valve is made up of valve body, fixed cover, vertical gusset, first order seal arrangement, second level seal arrangement and connecting rod, first order seal arrangement is arranged at the inducer of valve body, form by the flap that is fixed in the valve seat on the valve body and be arranged in the valve body fixed cover, between flap and valve body fixed cover, form control chamber, communicate, and softer single spring is set with outlet section; Second level seal arrangement is arranged at the outlet section of valve body, form by the valve seat that is arranged at the flap in the valve body and be fixed on the valve body, it is characterized in that: the intermediate section of the bottom of main valve is provided with anti-soil draining equipment by adapter, and anti-soil draining equipment is made up of valve gap, diaphragm of rubber sheet, flap, valve body, valve seat, short tube, adapter; Form the upward pressure chamber between the valve gap of anti-soil draining equipment and the diaphragm of rubber sheet, form the downforce chamber between valve body and the diaphragm of rubber sheet, diaphragm of rubber sheet and flap interlock.