CN2132047Y

CN2132047Y - Fully dydaulic micro-resistance delayed closing check-valve

Info

Publication number: CN2132047Y
Application number: CN 92208785
Authority: CN
Inventors: 徐大伟
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-05-08
Filing date: 1992-05-08
Publication date: 1993-05-05
Anticipated expiration: 2002-05-08

Abstract

The utility model relates to a full oil-pressure micro-resistance slow-closing check valve which is composed of a valve body, a valve plate, a slow closing device and the opening device of the slow closing device. The opening device of the slow closing device opens the slow closing device by the aid of the power which drives a valve plate shaft rotate when the valve plate is opened, and the slow closing device is in the operating state. The whole slow closing device system totally is adopted an oil hydraulic system, and is not contacted with the conveyed liquid. Thus, the utility model is not influenced by the conveyed primary liquid. The utility model can be suitable for conveying the liquid with more impurity, such as the raw water, the clear water, the sewerage, the petroleum, the slag, etc. The disadvantage that the HH44x type micro-resistance slow-closing check valve which is nationally used is only suitable for the clear water is overcome. The application range is wide, and the use is safe.

Description

Fully dydaulic micro-resistance delayed closing check-valve

The utility model belongs to the Tiny Drag Slow Shut Check Valves series products.Full oil pressure Tiny Drag Slow Shut Check Valves mainly is by valve body, valve plate, four most of compositions such as slow closing device and slow closing device opener.

Two kinds of HH44x of domestic present use at present and the little safety check that closes of the little resistance of HH44Z type, its slow closing device piston all is to lean on the water of being carried, enter in the cylinder body of slow closing device by a water pipe, the piston of slow closing device is released, make it in running order by the pressure of institute's transporting water.Unexpected when out of service when water pump, current stop, and valve plate is closed automatically by own wt and pressure of return water, when dropping to piston tip, the piston that valve plate is extended props up, and makes and leaves certain space between valve plate and the valve port, a part of water is released, thereby effectively eliminate water hammer.But it exists maximum shortcoming is the release of slow closing device piston, is by carrying the water that pressure is arranged to flow to the back cavity of slow closing device piston by a tubule in the valve body.So when carrying the bigger former water of sewage or silt content, just be easy to block the water pipe of slow closing device, the impurity silt particle enters in the oil hydraulic cylinder of buffering apparatus, oil hydraulic cylinder also is easily damaged.So just make this valve slow closing device to open, form water hammer, cause the pumping station accident.And HH44Z type Tiny Drag Slow Shut Check Valves piston back cavity changes oily Slow Close into, and piston remains and leans on the water carried to release, and water enters in the oil hydraulic cylinder of slow closing device equally, equally also exists the problems referred to above, carries impure many water and be suitable for.The slow closing device water pipe also often takes place in actual use blocked and slow closing device can't be opened, slow closing device is malfunctioning, causes the pumping station interruption of service.In order to solve above two kinds of existing problems of Tiny Drag Slow Shut Check Valves.The utility model drives valve shaft when adopting valve plate to open and rotates as power, by a hydraulic jack machine oil is compressed into the slow closing device oil pocket piston is released, and is in running order.When valve plate is closed, the machine oil of slow closing device is pressed in the oil cylinder again, whole slow closing device is that oneself one overlaps independently oil circulating system, do not contact with the water of being carried, so just go for former water, sewage, the conveying of crude oil and slag, overcome the shortcoming of HH44X and two kinds of Tiny Drag Slow Shut Check Valves of HH44Z, external existing rotational velocity by hydraulic jack control valve shaft, control the shut-in time of valve plate, to reach Slow Close, the oil cylinder that this and the utility model adopted has the difference of essence from using branch.The utility model utilizes valve plate to open the power of the rotation that drives valve shaft, by the oil cylinder of slow closing device opener the piston of slow closing device is released, and makes slow closing device in running order.

The utility model is by valve body, valve plate (1), and valve shaft (11), valve plate counterweight (14) slow closing device opener and slow closing device are formed.The slow closing device opener is by link rod (2), slow closing device opener piston (3), adjustable spring on the piston (15), slow closing device opener oil cylinder (4), the piston rod of disconnection (16), oil pipe (5), oil basin (6), vent on the oil basin (7), the modulating valve on the oil pipe (8) divides one-way valve (13) and the bayonet lock (12) on the valve shaft on the branch oil pipe to form.Slow closing device is by slow closing device piston (9), and slow closing device oil pocket (10) is formed.See Fig. 1.

Slow closing device opener oil cylinder (4) is positioned at a side of valve body outside, be fixed on the valve body by the bolt block on the valve body with bolt, opener piston (3) links to each other with piston rod (16), be to be connected between the piston rod (16) by an adjustable spring (15), the other end of piston rod is connected with link rod (2), piston rod (16) lower end is connected with dirty piston (3) in the oil cylinder (4), opener oil cylinder (4) top has one to lead to outside oil pipe (5), pick out two oil pipes (5) by a threeway then, modulating valve (8) is housed on the oil pipe (5), another root oil pipe is equipped with one-way valve (13), two oil pipes (5) communicate with slow closing device oil pocket (10), are connected on the rear portion of oil pocket (10).Opener oil cylinder (4) bottom has an oil pipe to communicate with oil basin (6).Vent (7) is arranged on the oil basin (6).Oil basin (6) also is fixed on a side of valve body.Link rod (2) connects together with valve shaft (11).Bayonet lock (12) is arranged on the valve shaft (11).

Piston (3) in (see figure 1) when valve plate is in closed condition, slow closing device opener oil cylinder (4) is in the bottom of oil cylinder (4), and oil basin is full of machine oil in (6), and slow closing device piston (9) is pressed in the oil pocket (10).When water pump is opened, valve plate (1) is pushed open by the pressure of water, leading portion in the valve plate opening process, the bayonet lock (12) on the valve shaft (11) does not contact with link rod (2), so link rod (2) does not rotate with valve shaft.When valve plate (1) be opened to become 30～35 ° of angles with valve port after, bayonet lock (12) contacts with link rod (2), and drive link rod (2) together rotates, link rod (2) drives piston rod (16) by spring and moves up with piston (3), oil cylinder (4) inner carrier (3) top machine oil pressurized, machine oil flows in the slow closing device oil pocket (10) by oil pipe (5), and slow closing device piston (9) is released, slow closing device is in running order, sees Fig. 2.Machine oil in the oil basin (6) is inhaled in the oil cylinder (4).The effect of spring is the movement travel of regulating piston (3), to regulate the outflow of slow closing device opener oil cylinder (4), makes its outflow identical with the volume of slow closing device oil pocket.The stretching of spring is adjustable.

When water pump quits work, at this moment the state of valve plate (1) is seen Fig. 3, valve plate is closed rapidly under own wt and pressure of return water effect, at this moment valve plate (1) is to counter-rotation, bayonet lock (12) on the valve shaft (11) breaks away from link rod (2), link rod (2) does not rotate with valve shaft (11), and slow closing device opener piston (3) is in oil cylinder (4) top.When valve plate (1) is propped up by piston (9), a part of water is refluxed by the space between valve plate (1) and the valve port, and effectively eliminate water hammer, slow closing device piston (9) is pressed, machine oil in the slow closing device oil pocket (10) is forced out, flow back in the oil cylinder (4) by the oil pipe that modulating valve (8) is housed, piston (3) is pushed back position shown in Figure 1.Modulating valve (8) can be regulated oil mass and come regulating piston (9) movement velocity, thereby regulated the shut-in time of plate valve (1), another root divides one-way valve (13) is housed on the branch oil pipe (5), machine oil can only be pressed in the oil pocket (10) in oil cylinder (4), and the machine oil in the oil pocket (10) can not flow back in the oil cylinder (4) by this root arm.When this root branch oil pipe effect is exactly valve plate (1) unlatching, can be pressed into machine oil rapidly in the oil pocket (10) by oil cylinder (4).And the machine oil in the oil pocket (10) can only flow back in the oil cylinder (4) by modulating valve (8) arm is housed.Because machine oil is pushed back the top of oil cylinder (4) inner carrier (3), piston (3) moves down, and the machine oil of piston (3) bottom is pushed back in the oil basin (6), and the air in the oil basin (6) is discharged by vent (7).

The oil pressure Slow Close system of full oil pressure Tiny Drag Slow Shut Check Valves does not contact with the water of being carried, whole hydraulic system inside all is machine oil, so this valve is not subjected to the influence of the water quality of the water carried, this model utility goes for clear water, former water, sewage, various impure many liquid such as oil and slag water.And do not pollute the water quality of institute's transporting water, it is wide to have using scope, safe in utilization, easy to operate, long service life, advantage such as easy to maintenance.

Claims

1, a kind of full oil pressure Tiny Drag Slow Shut Check Valves, it is made up of valve body, valve plate (1), valve plate counterweight (14), slow closing device opener and slow closing device, it is characterized in that: the slow closing device opener is made up of the spring (15) on link rod (2), slow closing device opener piston (3), the piston rod, oil cylinder (4), piston rod (16), oil pipe (5), oil conservator (6), vent (7), modulating valve (8), one-way valve (13), bayonet lock (12), and slow closing device is made up of piston (9), oil pocket (10).

2, full oil pressure Tiny Drag Slow Shut Check Valves according to claim 1 is characterized in that: an end of described link rod (2) is to be connected with opener piston rod (16) by an adjustable spring.

3, according to claim 1 and 2 described full oil pressure Tiny Drag Slow Shut Check Valves, it is characterized in that: disconnect in the middle of the piston rod (16), the spring on piston rod (15) will couple together up and down.

4, according to claim 1 and 2 described full oil pressure Tiny Drag Slow Shut Check Valves, it is characterized in that: the other end of link rod (2) is to be socketed on the valve shaft (11) that has bayonet lock (12).

5, full oil pressure Tiny Drag Slow Shut Check Valves according to claim 1 is characterized in that: oil cylinder (4), in the slow closing device opener piston (3) that is immersed in the machine oil is housed, and at the outside of oil cylinder (4) two transport pipe of upper and lower connection (5).

6, according to claim 1 and 5 described full oil pressure Tiny Drag Slow Shut Check Valves, it is characterized in that: go up oil pipe (5) through branch three connects modulating valve (8) after and oil pocket (10) UNICOM.

7, according to claim 1 and 5 described full oil pressure Tiny Drag Slow Shut Check Valves, it is characterized in that: go up oil pipe (5) through threeway branch connects one-way valve (13) after and oil pocket (10) UNICOM.

8, according to claim 1 and 5 described full oil pressure Tiny Drag Slow Shut Check Valves, it is characterized in that: the other end of following oil pipe (5) and oil conservator (6) bottom link.

9, according to claim 1 and 8 described full oil pressure Tiny Drag Slow Shut Check Valves, it is characterized in that: oil conservator (6) top has a vent (7).