CN2931978Y

CN2931978Y - Cushion check valve

Info

Publication number: CN2931978Y
Application number: CN 200620031786
Authority: CN
Inventors: 李双信; 任江安
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-04-21
Filing date: 2006-04-21
Publication date: 2007-08-08
Anticipated expiration: 2016-04-21

Abstract

The utility model discloses a cushion check valve, which comprises a valve body, a valve cover, a rocker, a valve clack and a cushion device, wherein the valve body (1) is provided with the valve cover (2), the rotating rocker (5) in the valve body is connected with the valve clack (4) by a pin (6). The utility model is characterized in that: the cushion check valve is provided with a sealing ring (3) on one side of the valve clack and a cushion device on the lower portion of the valve body, the cushion device piston rod (11) withstands the valve clack (4) suffering from water reflow attack. Due to drain dumping action, the cushion check valve is capable of single direction water transmission and protecting water reflows. The utility model is of little noise, simple structure, low cost and convenient installation.

Description

Buffer check valve

Technical field:

The utility model relates to valve technology field, is particularly useful for a kind of buffer check valve in the aqueduct.

Background technique:

At present, the safety check in aqueduct plays unidirectional water delivery, and has the effect that anti-sealing refluxes; It uses very generally; But do not have damping device in some old safety check, when cutting out the pump, sound is very big, and the flap of its safety check easily to the impact of water pump and pipeline, causes pump housing screw loosening to the vibration of valve body, and the flap of safety check damages and the breaking of pipeline; Also have some safety check to have damping device, increased cushion cylinder, its complex structure, cost height.

Summary of the invention:

In order to overcome the deficiency that prior art exists, the utility model provides a kind of buffer check valve, utilizes the effect of draining damping, make it have unidirectional water delivery, anti-simultaneously sealing backflow effect, its sound is very little, this apparatus structure is simple, and cost is low, and is easy to install.

In order to realize the foregoing invention purpose, the utility model adopts following technological scheme:

Described buffer check valve comprises valve body, valve gap, rocking bar, flap and damping device; Valve gap is arranged at its valve body top, and the rocking bar distribution of rotating in the valve body connects flap, and the another side of flap is equipped with seal ring, and the bottom is provided with a damping device in the valve body, and the piston rod of damping device withstands the flap that is subjected to the water flow-reversing impingement.

Described buffer check valve, its damping device has cylinder body, piston rod, piston and damping hole; Its cylinder body is cylindrical, and piston mobile is arranged in the cylinder body, and piston connects piston rod, and piston rod passes cylinder body and connects buffer head, is provided with damping hole at cylinder body one end.

Described buffer check valve, the last end device of its damping hole has filter screen.

Owing to adopted above-mentioned technological scheme, the utlity model has following good effect:

This buffer check valve utilizes the effect of piston draining damping, makes it have unidirectional water delivery, anti-sealing backflow effect, its water flow-reversing impingement flap of while, the sound of flap bump valve body reduces, and the pump housing on the aqueduct, the flap and the pipeline of safety check are stood intact; This apparatus structure is simple, makes easily, saves material, and cost of production is low, and is easy to install.

Description of drawings:

Fig. 1 is the structural representation of buffer check valve;

Among the figure; The 1-valve body; The 2-valve gap; The 3-seal ring; The 4-flap; The 5-rocking bar; The 6-pin; The 7-cylinder body; The 8-filter screen; The 9-damping hole; The 10-piston; The 11-piston rod; The 12-buffer head.

Embodiment:

As shown in fig. 1: this buffer check valve comprises valve body (1), valve gap (2), rocking bar (5), flap (4) and damping device; Bolted valve gap is arranged at its valve body top, and valve inner connects the rocking bar that rotates, and rocking bar distribution (6) connects flap, and the another side of flap is equipped with seal ring (3); The bottom is provided with a damping device in the valve body, and the piston rod of damping device (11) withstands flap, slows down the impact force that pipeline water refluxes, and damping device has cylinder body (7), piston rod, piston (10) and damping hole (9); In its cylinder body piston mobile is arranged, piston connects piston rod, and piston rod passes cylinder body and connects buffer head (12), be provided with damping hole (9) at cylinder body one end, the last end device of damping hole has filter screen (8), is used to filter the impurity of water delivery, guarantees that the piston (10) in the cylinder body moves normal.

During work, when opening the water pump water delivery, current flow into from the water intake of buffering safety check, and flap (4) outwards rotates around pin (6) through rocking bar (5) under the effect of water flow pressure, and the buffer check valve door is opened; Current promote piston (10) through damping hole (9) simultaneously, and the piston rod on the piston (11) promotes flap through buffer head (12).When stopping water delivery when switching off the pump, the backwater of pipeline flows into from the water outlet of valve, and flap inwardly rotates around pin through rocking bar under the pressure effect of the backwater of pipeline; Withstand the buffer head of flap this moment, promote piston through piston rod, the current in the piston extruding cylinder body (7) are to the damping hole draining; Make the pressure of flap through damping buffering pipeline backwater, last flap is pressed on the valve body, and current can not be passed through.

Claims

1, a kind of buffer check valve comprises valve body, valve gap, rocking bar, flap and damping device; Valve gap (2) is arranged at its valve body (1) top, rocking bar (5) distribution (6) of rotating in the valve body connects flap (4), it is characterized in that: described safety check, the one side of its flap is equipped with seal ring (3), the bottom is provided with a damping device in the valve body, and the piston rod of damping device (11) withstands the flap (4) that is subjected to the water flow-reversing impingement.

2, buffer check valve as claimed in claim 1 is characterized in that: described damping device has cylinder body (7), piston rod (11), piston (10) and damping hole (9); Its cylinder body is cylindrical, and piston mobile (10) is arranged in the cylinder body, and piston connects piston rod (11), and piston rod passes cylinder body (7) and connects buffer head (12), is provided with damping hole (9) at cylinder body one end.

3, buffer check valve as claimed in claim 2 is characterized in that: described damping hole (9) is gone up end device filter screen (8).