CN1112657A

CN1112657A - Cone damping check valve

Info

Publication number: CN1112657A
Application number: CN 94112665
Authority: CN
Inventors: 李桂林
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-12-08
Filing date: 1994-12-08
Publication date: 1995-11-29
Anticipated expiration: 2014-12-08
Also published as: CN1033531C

Abstract

The present invention relates to a sound-damping check valve for general hydraulic engineering. Its valve body is made into two frustum forms which are identical in two large diameters and two small diameters and different in length, and connected int he large diameter place, and on the piston mounting frame placed on its outlet body, the piston rod, piston cylinder body, piston head and sealing ring are mounted, and a spring aid to closing is installed between the piston cylidner body and piston mounting frame, and on the piston head, an outflow slow-closing plug is mounted, and the external side of the piston cylinder body is equipped with an opening-limiting piston and its cylinder body, and on its piston mounting frame, a multifunction al valve and a check valve are installed, and the flow passages are cut on the above-mentioned valve bodies and piston rod. Its characteristics are as follows: It can remove water-hammer, and is abjustable in opening and closing speed of valve.

Description

Cone damping check valve

The present invention relates to a kind of general hydraulic engineering damping check valve.

Valves such as the stop valve that generally uses in the present hydraulic engineering, gate valve, Tiny Drag Slow Shut Check Valves, its structure is a special valve, above-mentioned valve can not be general mutually, and only be applicable to low hydraulic pressure, exists defectives such as function singleness, volume is big, flow resistance is big in the use.

It is wide that the object of the invention provides a kind of using scope, and the applied hydraulic pressure height can be eliminated water hammer, and the closing velocity of valve can be implemented to regulate outside valve, but regulated at will makes it become the cone damping check valve of gate valve during termination of pumping.

The present invention is the inlet body by valve body, the outlet body, the Slow Close piston, limit is opened piston, runner, outer flow passage, many merits valve is formed, it is identical that valve body is processed into two big footpaths, two paths are identical, length is different and greatly directly locating to be connected two frustum shapes, the inlet body of valve body is provided with the piston scaffold with the outlet body of the joint of outlet body, the piston rod of Slow Close piston is installed on the piston scaffold, piston/cylinder (moving flap) is positioned at the piston head outside, be provided with to help between piston/cylinder and the piston scaffold and close spring, the top of piston rod is equipped with piston head, seal ring is arranged at piston cylinder top, limited piston and the cylinder body opened of the arranged outside of piston/cylinder, on piston rod and piston scaffold, be processed with runner, be processed with runner between outlet body and the inlet body, outflow Slow Close plug is fixed on the piston head by the restriction frame, runner in it communicates with the runner on the piston rod, many merits valve is positioned on the piston scaffold of outlet body, the intake-outlet of distance sink tube communicates with runner mouth on the piston scaffold on many merits valve, moving valve seat withstands on the distance sink tube by spring one end, the other end withstands on many merits valve body, many merits body cavity is provided with the needle type valve bar, on valve body and piston scaffold, be processed with intake-outlet, also be provided with stop valve on the piston scaffold, the intake-outlet of stop valve communicates with runner on the piston scaffold; Male cone (strobilus masculinus) parallels in seal ring and the valve body sealing surface, and be obedient to streamline be cut in curved annular runner and inlet body and outlet body center line angle greater than 0 degree less than 90 degree; Piston rod and piston head and piston/cylinder and seal ring leave sliding distance.

The present invention has that volume is little, in light weight, long service life, easy-maintaining, cost are low, applicable to environment such as clear water, former water, removes water hammer, and function is many, characteristics such as multi-purpose valve.

Accompanying drawing 1 is structure sectional view of the present invention.

Accompanying drawing 2 is many merits of the present invention valve arrangement schematic representation.

Below in conjunction with accompanying drawing the present invention is further described, structure of the present invention is to realize like this, compact and the investigation mission outside the city or town device of concrete structure of the present invention, water passes through the interior runner of Cone valve merit valve at the most by piston/cylinder (moving flap) 5, again by many merits valve media discharge in Cone valve, switching to valve is regulated, and this structure does not have inside and outside tubulature road fully, processes by the indispensable part in the Cone valve.Piston/cylinder itself is a hydraulic parts, and is contemporary for the Cone valve flap, and the static and motion of piston head realizes valve opening by the piston/cylinder motion when work, has cancelled individualism flap and axle, has reduced the volume and weight of Cone valve.Cone valve seal ring 8 parallels with male cone (strobilus masculinus) in the valve body sealing surface 25, and be obedient to streamline and be cut in curved annular runner 26, the angle of the inlet body 1 of it and valve body and outlet body 2 center lines greater than 0 ° less than 90 °, when flap is closed, can accomplish good contact, play seal action, clear water or former water valve are by being contained in interior stream on the piston head 7 or outflow Slow Close plug 14 and being installed in many merits valve 15 on the valve outlet body piston scaffold and constituting double speed of the present invention and close valve arrangement, closing the stage soon, be provided with between piston/cylinder and the piston scaffold 3 to help and close spring 6, in-flow Slow Close plug directly comes the medium in the piston/cylinder in the Cone valve in the stage of closing soon, be used for purge valve, the Slow Close stage is not arranged medium.Outer-flowing type Slow Close plug is emitted on valve hydraulic control isolation mounting valve body outside with the medium in the cylinder body from runner 24 in the stage of closing soon, for valve speed is closed in Open valve feed flow, adjusting rapidly, overcome the obstruction that cause this body structure of Cone valve fixed hole and fixed interval (FI), and has a controlled gate valve function, in order to stop up with the operation cleaning, be provided with many merits valve on Cone valve, this many merits valve can contain and is contained in the Cone valve, also can be provided with separately outside valve body.But the sealing pair of insert and replacing, comprise piston head 7 and seal ring 8, piston/cylinder 5, can change as required and assemble, in 13 of piston rod 4 and piston head and runner 12 isolated settings, 24 is former water valve runner, on this runner, connect limit and open piston 9 and cylinder body 10, and install stop valve 22 additional, make this Cone valve have controlled gate valve function, this runner is connected on the clear water end of valve hydraulic control isolation mounting by annular runner, again that the muddy water termination of 27 runners and valve hydraulic control isolation mounting is logical, just constitute former water valve, if on the cone valve body, do not process annular runner, (promptly cancelling 13 runners among the figure) directly leads to Cone valve with runner among Fig. 1 24 behind stop valve 22, just constitute purge valve, the present invention divides two kinds of structures, a kind of is synchronization structure, be that piston rod and piston head piston/cylinder (moving flap) are fixing integral structure with seal ring, seal ring and piston/cylinder are synchronous actions fully, this synchronization structure can be finished the function of controlled gate valve, another kind is an asynchronous structure, be piston rod and piston head, piston/cylinder and seal ring leave sliding distance, not synchronous in the valve quick closedown stage with cylinder body, synchronous in the Slow Close stage, this valve does not have controlled gate valve function, but the noise elimination valve of asynchronous structure is applicable to high pressure, small flow send water system.

Working principle of the present invention is such:

1. when the flap of this Cone valve in off position the time, behind the starting of pump station, the stop valve on runner 24,12, when many merits valve is opened the valve state, this moment, hydraulic pressure acted on the fixed block piston head simultaneously, movable piece piston/cylinder (also being flap): piston head is motionless, and cylinder body flows to the back with liquid and moves; This motion must follow the expansion of the volume in the cylinder body to form negative pressure, former water valve or purge valve will be by runner among Fig. 1 12 from valve hydraulic control isolation mountings or directly open piston 9 and contract to minimum range from ultimate range from the Cone valve clear water being sucked in the cylinder body meanwhile Fig. 1 limit fast through many merits valve, the liquid that has sucked in it is discharged outside the piston cylinder, so just finished the pass valve process of safety check.

If before turn on pump, stop valve and many merits valve of runner 24 and 12 are closed, the dilatation that is to say cylinder body is restricted, the liquid that limit is opened in the piston cylinder does not have the road discharge, though at this moment moving flap is under pressure, also can't breakdown, Here it is plays the controlled gate valve function that the turn on pump that is undertaken by operator's intention is not driven valve.

2. water pump is out of service, because fluid flows backwards and helps the acting in conjunction of closing spring 6, force flap to move to Way in, this process must follow dwindling of cylinder internal volume that the interior liquid of cylinder is discharged outside cylinder, because the effect of outflow Slow Close plug 14 and many merits valve, make the interior discharge opeing of cylinder be divided into two stages (arrange soon and overflow and arrange section), former in this way water valve, fast row (valve process soon) drain into valve hydraulic control isolation mounting through runner 24,13; The fast row of purge valve directly comes in the Cone valve through Slow Close plug flow road 24 in this way.Said process must follow limit to open the imbibition process of piston, and former water valve sucks purge valve by directly sucking in the Cone valve by valve hydraulic control isolation mounting.When cylinder bottom is shut the inlet of Slow Close valve plug, be that runner 11 on Slow Close plug and the piston rod is shut, the section of closing promptly comes to an end soon, the Slow Close section begins, at this moment the liquid in the cylinder must drain in valve hydraulic control isolation mounting or the Cone valve through the control gap of runner 12 by many merits valve of having mixed up in advance, and Here it is overflows closed procedure.

If before termination of pumping, close many merits valve and stop valve, just say that also two passes in the cylinder (Fig. 1 24,12) is closed, the liquid in the cylinder can't be discharged, this moment flap still to locate original position motionless, termination of pumping just and the controlled function of closing valve of not closing valve.

3. the weight of this Cone valve is the 1/3-1/4 of Tiny Drag Slow Shut Check Valves weight, and volume is the comparison that Tiny Drag Slow Shut Check Valves 1/5-1/6(is both the DN100 valve)

Cone valve is compared with the valve kind Slow Close dish valve of the minimum of current domestic appearance, and their structure length is identical, and the height of Cone valve only is 0.611 times of Slow Close dish valve.

Moreover, the overflow section of Cone valve is long-pending bigger more than 15% than slow valve disc valve, and energy-saving effect is more much better than Slow Close dish valve in other words.

4. the sealing of Cone valve recommends one of them to use soft seal, but also can select two hard sealings as required for use; Metal and the compound assembly type seal ring of soft material are adopted in soft seal, have not only improved sealing effect, and change easy to assemblyly, the spare part cost is low, have overcome the shortcoming that seals damaged is in the past changed flap.

5. in-flow Slow Close plug, be individual by leading to the outer straight tube under spring action of cylinder body in the cylinder body, that is to say the section of closing soon not the outflow of the liquid inside and outside the control cylinder flow into, this situation has just lost the function of controlled gate valve, so have the safety check of controlled gate valve function, outer-flowing type Slow Close plug (as shown in Figure 1) must be installed, make outflow, the liquid that flows into the Slow Close plug must pass through runner 24, and before the valve hydraulic control is in device and Cone valve stop valve is being installed, this stop valve is controlled outflow simultaneously, flow into liquid and inflow in the cylinder body, the limit that flows out is opened the liquid of piston.The cooperation of stop valve and many merits valve makes this Cone valve possess the effect of controlled gate valve.

The distance sink tube 16 and the whole valve body of many merits valve are embedded in the piston scaffold of cone damping check valve, intake-outlet 17 communicates with runner 12 on the piston scaffold, moving valve seat 18 withstands on the distance sink tube by spring 19 1 ends, the other end withstands on many merits valve body, needle type valve bar 20 ends contact with moving valve seat 17, regulate this needle type valve bar may command intake-outlet medium current size, be processed with intake-outlet 21 on valve body and the piston scaffold, be processed with intake-outlet 23 on the stop valve 22 on the piston scaffold and communicate with runner 24 on the piston scaffold, many merits valve and stop valve play control Cone valve Slow Close and play the function of gate valve.

Claims

1, cone damping check valve, it is inlet body by valve body, the outlet body, the Slow Close piston, limit is opened piston, runner, outer flow passage, many merits valve is formed, the footpath is identical greatly to it is characterized in that being processed into two by valve body, two paths are identical, different and two the frustum shapes that be connected at place, big footpath of length, the inlet body (1) of valve body is provided with piston scaffold (3) with the outlet body of the joint of outlet body (2), the piston rod of Slow Close piston (4) is installed on the piston scaffold, piston/cylinder (moving flap) (5) is positioned at the piston head outside, be provided with to help between piston/cylinder and the piston scaffold and close spring (6), the top of piston rod is equipped with piston head (7), seal ring (8) is arranged at piston cylinder top, limited piston (9) and the cylinder body (10) opened of the arranged outside of piston/cylinder, on piston rod and piston scaffold, be processed with runner (11), (12), be processed with runner (13) between outlet body and the inlet body, outflow Slow Close plug (14) is fixed on the piston head by the restriction frame, runner in it communicates with the runner on the piston rod, many merits valve (15) is positioned on the piston scaffold of outlet body, the intake-outlet (17) of distance sink tube on many merits valve (16) communicates with the runner mouth on the piston scaffold, moving valve seat (18) withstands on the distance sink tube by spring (19) one ends, the other end withstands on many merits valve body, many merits body cavity is provided with needle type valve bar (20), on valve body and piston scaffold, be processed with intake-outlet (21), also be provided with stop valve (22) on the piston scaffold, the intake-outlet of stop valve (23) communicates with runner (24) on the piston scaffold.

2, according to the described cone damping check valve of claim 1, it is characterized in that seal ring (8) parallels with the interior male cone (strobilus masculinus) of valve body sealing surface (25), and be obedient to streamline be cut in curved annular runner (26) and inlet body and outlet body center line angle greater than 0 degree less than 90 degree.

3,, it is characterized in that piston rod and piston head and piston/cylinder and seal ring leave sliding distance according to the described cone damping check valve of claim 1.

4,, it is characterized in that runner 12 and runner 24 are mutual isolation structure according to the described cone damping check valve of claim 1.