CN2212115Y

CN2212115Y - External mounted buffer closing check valve

Info

Publication number: CN2212115Y
Application number: CN 95233201
Authority: CN
Inventors: 曹丹; 刘勇; 苏颖秋; 刘达东
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-02-20
Filing date: 1995-02-20
Publication date: 1995-11-08
Anticipated expiration: 2005-02-20

Abstract

The utility model belongs to a check valve used on a liquid supply and discharge pipeline, which comprises a valve body 1, a valve plate shaft 13 and a valve plate 15. The check valve is characterized in that a damping bar 3 is fixedly installed on the outer end part of the valve plate shaft 13 outside the valve body 1, and a buffering and locking device which is matched with the damping bar to use is fixed to the valve body 1. Because the buffering and locking device of the valve is completely installed outside the valve body, the action of the valve is no longer affected by conveyance media, and thus, the check valve is especially suitable for conveying slurry. In addition, a wearproof inner liner 14 can be fixed in the valve body; therefore, the wearproof property of the valve body can be enhanced, and the service life of the valve body can be extended.

Description

External mounted buffer closing check valve

The utility model belongs to a kind of and is giving the safety check that uses on the discharge opeing body pipeline, particularly is fit to the employed safety check of transfer ore pulp.

Producing at present the safety check of the band slow closing device that uses, mainly is that to be used in the liquid delivery tube of carrying clear water or being similar to clear water online.When being used for slurry body or be similar to the liquid of slurry,, also compare thickness, and the solid particle that suspends also is easy to deposition because the solid particle that suspends in this liquid is many.The safety check of the present band micro-resistance slowly-closed device that uses, great majority are the bottoms that the micro-resistance slowly-closed device are installed in valve, make piston rod extend into body cavity.Its deficiency is: one, if the termination of pumping time is longer, the solid matter that piston rod is deposited easily buries, and piston rod can't be stretched out, and causes the micro-resistance slowly-closed device malfunctioning, when termination of pumping, makes pipe network produce destructive water hammer easily.Its two because piston extend in the body cavity, the slurry that is transferred for a long time washes away, and is easy to be denuded.Its three, the slurry that the check mouth of the inwall of valve body and valve is transferred for a long time washes away, the solid particle that suspends in the slurry is also relatively more serious to its abrasion, the working life that can reduce valve body widely.

No matter the purpose of this utility model is to be to carry clear water or slurry body in order to provide a kind of, can both guarantee its micro-resistance slowly-closed device action sensitivity, reliable, and the good Tiny Drag Slow Shut Check Valves of valve body wear resistance.

The utility model is to realize like this, its safety check partly still is made up of valve body, valve plate and valve shaft, its technological points is: an end of the valve shaft outside valve body fixedly mounts a damper rod at least, is installed with a Slow Close damping device that is used with damper rod on that side valve body that damper rod is installed.This Slow Close damping device contacts with the other end of damper rod in the damping process, produces damping function when valve plate is closed, and reaches the purpose of micro-resistance slowly-closed.Stretching out of piston rod in the Slow Close damping device can be controlled by linkage mechanism by damper rod, also can control by spring mechanism, equally also can control by the liquid that is transferred.Its resisting medium can be used oil, also can water or other liquid.In order to strengthen the wear-resisting property of valve body, the liner that high-abrasive material is made is installed at the valve body internal fixation.The working principle of this valve is: when starting transfer pump, the fluid that is transferred is opened valve plate, and at this moment, the damper rod that is fixedly mounted on the valve shaft rotates under the drive of valve shaft, leave the piston rod of Slow Close damping device, under the piston rod effect of power plant in its back-end to overhanging.In the outwardly directed while of piston rod, damping liquid enters into the inner chamber of Slow Close damped cylinder by one-way throttle valve and indusion tube.When termination of pumping, valve plate returns under the impact that is transferred liquid return, at this moment damper rod and valve plate return simultaneously, when damper rod with after this piston rod contacts, damper rod promotes piston rod and returns, and then piston rod refluxes through piston compressing damping liquid, and the damping liquid that at this moment enters Slow Close damped cylinder inner chamber will slowly flow out through the restriction of one-way throttle valve, the retraction speed of piston rod is slowed down, to reach purpose to the valve plate micro-resistance slowly-closed.

Because the micro-resistance slowly-closed device of this Tiny Drag Slow Shut Check Valves all is installed in the outside of valve body, the action of the damping piston-rod in its micro-resistance slowly-closed device no longer is subjected to being transferred the influence of medium.Therefore, it is installed on the transmission pipeline network of clear water use no matter be, still it is installed on the slurry transmission pipeline network and uses, can both guarantee that damping piston-rod stretches out or the reliability and the sensitivity of the action that bounces back, to produce destructive water hammer on the pipe network that prevents to be transferred liquid, ensure the safe operation of unit and pipe network.Because body cavity is installed with wear-resistant liner and piston is moved on to outside the valve body, prevents this valve effectively when being used for slurry body, to the abrasion of valve body or piston rod, has prolonged the working life of this valve.

Below in conjunction with accompanying drawing the utility model is described in detail.

Fig. 1 is a structure principle chart of the present utility model;

Fig. 2 is the internal structure schematic diagram of the utility model valve body;

Fig. 3 is a kind of embodiment of the utility model Slow Close housing assembly;

Fig. 4 is the another kind of embodiment of the utility model Slow Close housing assembly.

Safety check of the present utility model partly still is made up of valve body 1, valve shaft 13 and valve plate 15.Its valve body 1 can adopt monolithic construction, for the ease of valve shaft 13 and valve plate 15 are installed, at this moment, should establish the mounting process mouth in the upper end portion of valve body 1, fixed installation valve gap 2 on this technology mouth.Valve body 1 also can be taked split-type structural, and promptly valve body 1 is made of front and back two-part, and two-part separatrix, the front and back of its valve body 1 preferably is located at the contrary stop portion of valve, so relatively is convenient to install valve shaft 13 and valve plate 15.These two-part of front and back of forming valve body 1 connect with bolt, form a fixing integral body and get final product, and at this moment can no longer establish the mounting process mouth on the valve body 1, also no longer need valve gap 2.Valve plate 15 of the present utility model can adopt one, i.e. round structure.Also can adopt two, promptly form by two semicircle valve plates.If the two half lobe formula valve board structures that adopt two semicircular valve plates to constitute, its valve shaft 13 can adopt one; Also can adopt two, promptly two semicircle valve plates 15 are installed in respectively on two valve shafts 13.Valve shaft 13 can level be installed, and also can be installed in the vertical plane.The check mouth of valve body 1 can adopt the structure that parallels with the suction flange mouth, also can adopt the tilting structural type that forms an angle with suction flange, promptly usually said angle valve.Micro-resistance slowly-closed damping mechanism of the present utility model is installed in the outside of valve body 1.With reference to accompanying drawing 1,, on the homonymy valve body 1 that damper rod 3 is installed, be installed with the Slow Close damping device that matches and use with damper rod 3 at damper rod 3 of the end of the valve shaft 13 in valve body 1 outside fixed installation.This Slow Close damping device can adopt multiple structural type.With reference to accompanying drawing 3, this Slow Close damping device can adopt mechanical linkage type, its concrete structure is: housing assembly 11 is fixedly mounted on the valve body 1 through link 17, its housing assembly 11 is formed by fixedly connecting by left cylinder 20 and right cylinder body 19, in the inner chamber of cylinder body piston is installed, the right-hand member of this piston is fixed with piston rod 18, and piston rod 18 stretches out outside the cylinder body through the end face center hole of right cylinder body 19, under off working state, the outer end of piston rod 18 contacts with damper rod 3.A piston mandril 21 is installed in the end face center hole of left cylinder 20.On left cylinder 20, also be processed with communicate with inner chamber of cylinder block advance oil drainage hole 22, fixedly connected with oil-storing cup 10 with one-way throttle valve successively through advancing oil drainage hole 22, indusion tube.Throttle valve and oil-storing cup 10 can manufacture one.Also be hinged with a rocking bar 9 on valve body 1, the lower end of rocking bar 9 contacts with the outer end of piston mandril 21, and the upper end of rocking bar 9 and connecting rod 7 are hinged, and connecting rod 7 is connected with the push rod 5 that is fixedly mounted on damper rod 3 rear ends.Here said push rod 5 is connected with connecting rod 7 and refers to: connecting rod 7 is hinged with push rod 5 or connecting rod 7 is installed in the sliding sleeve 6 on the valve body 1 the outer side surface sliding contact of the end of connecting rod 7 and push rod 5.The working principle of this Slow Close damping device is: when valve plate is opened, damper rod 3 leaves piston rod 18, when push rod 5 rotates with valve shaft 13, it is protruding to promote piston rod 18 through connecting rod 7, rocking bar 9, piston head 21, piston, at piston rod 18 in overhanging, the hydraulic oil in the oil-storing cup 10 through one-way throttle valve, transport pipe, advance oil drainage hole 22 and enter inner chamber of cylinder block.When valve plate is closed, damper rod 3 returns, when damper rod 3 with after piston rod 18 contacts, promote piston rod 18 retractions, since when entering hydraulic oil in the inner chamber of cylinder block and under the promotion of piston, refluxing, then will be through the restriction of one-way throttle valve, and its back-flow velocity slows down, also just the slowed down retraction speed of piston rod 18 promptly reaches the purpose of valve plate 15 Slow Closes.With reference to accompanying drawing 4, this Slow Close damping device also can adopt the spring action formula.The structural type of said spring action formula is: its housing assembly 11 also is the outside that is fixedly mounted on valve body 1 by link 17.Housing assembly 11 also is to be formed by fixedly connecting by right cylinder body 19 and left cylinder 20, and a piston that has piston rod 18 is installed in inner chamber of cylinder block.Piston rod 18 stretches out outside the cylinder body through the end face center hole of right cylinder body 19.A spring 23 is installed between the interior edge face of piston and left cylinder 20, and the effect of spring 23 is by the elastic force of himself piston rod 18 to be released outside the cylinder body.Pressure size for 23 pairs of pistons of energy Regulation spring is equipped with a spring spindle 24 in the end face center hole of left cylinder 20, promptly spring 23 is installed between piston and the spring spindle 24.For spring spindle 24 is regulated, the controlling mechanism of spring spindle 24 is installed on the left side of left cylinder 20.This controlling mechanism is: the rearward end that can be spring spindle 24 is provided with thread spindle, is processed with corresponding tapped hole in the end face center hole of left cylinder 20 corresponding with it, comes Regulation spring push rod 24 to reach the purpose of Regulation spring pressure by this screw thread.This controlling mechanism can also be support 26 of fixed installation on the end face of left cylinder 20, installs one and regulate bolt 25 formations in the tapped hole of these support 26 end faces, and its inner of regulating bolt 25 contacts with spring spindle 24.On left cylinder 20, also be processed with one communicate with inner chamber of cylinder block advance oil drainage hole 22, advance oil drainage hole 22, transport pipe by this and fixedly connected formation with oil-storing cup 10 with one-way throttle valve successively.The working principle of this Slow Close damping device and the former compare, and the piston rod 18 in housing assembly 11 is to be different from the former with the linkage mechanism effect by spring 23 effects, and other steps are identical, just no longer repeated here.

The Slow Close damping device that the utility model adopted also can promptly be fixedly connected sequentially valve body 1, one-way throttle valve, piston assembly 11 by conduit with traditional structural type, and constituting with the liquid that is transferred is the Slow Close damping device of medium.Can also adopt the Slow Close damping device of water, oil associating, be that piston assembly 11 adopts double-piston two-chamber acting cylinder, one of them piston cavity is fixedly connected sequentially through conduit and one-way throttle valve, store oil bar 10, another piston cavity then is connected with valve body 1 through conduit, the liquid of carrying with this valve is the thrust medium, is that resisting medium is formed the Slow Close damping device with hydraulic oil.This Slow Close damping device can also adopt other structural types.With reference to accompanying drawing 2, in order to improve the wear resistance of this valve body 1, in wear-resistant liner 14 of inner chamber fixed installation of valve body 1, liner 14 the most handy rubber manufacturings.In order to improve the working life of check mouth, the check mouth manufactures the Changable type structure, and promptly at valve nozzle 16 of contrary stop portion fixed installation, valve nozzle 16 is fixed by bolt by the high-abrasive material manufacturing.In case valve nozzle is denuded, then can change valve nozzle 16, can improve the working life of this valve body like this.Micro-resistance slowly-closed damping mechanism of the present utility model can be a cover, is installed in a side of valve body 1.This micro-resistance slowly-closed damping mechanism also can be two covers, is installed in the both sides of valve body 1 respectively.When valve shaft 13 is installed for level, for the deadweight that alleviates valve plate 15 to being transferred the resistance of liquid, in the one or both ends of valve shaft 13 balanced weight 12 is installed.In this micro-resistance slowly-closed damping mechanism, in order to alleviate the impact force that damper rod 3 contacted with 18 moments of piston rod, the front end of piston rod 18 or with piston rod 18 contacted damper rods 3 on cushion 4 of fixed installation.

Claims

1, external mounted buffer valve, it comprises by valve body (1), valve shaft (13) and valve plate (15) forms safety check itself, it is characterized in that: at least one end of the valve shaft (13) outside valve body (1) is installed with a damper rod (3), is installed with the Slow Close damping device that matches and use with damper rod (3) at the homonymy of valve body (1).

2, external mounted buffer valve according to claim 1, it is characterized in that: the housing assembly (11) that constitutes one of Slow Close damping device is fixedly mounted on the valve body (1) through link (17), its housing assembly (11) is formed by fixedly connecting by left cylinder (20) and right cylinder body (19), the piston of band piston rod (18) is installed in the inner chamber of cylinder body, piston rod (18) stretches out outside the cylinder body through the end face center hole of right cylinder body (19), a piston mandril (21) is installed in the end face center hole of left cylinder (20), the outer end of piston mandril (21) contacts with a end of rocking bar (9) on being hinged on valve body (1), one end of the other end of rocking bar (9) and connecting rod (7) is hinged, and the other end of connecting rod (7) is connected with the push rod that is fixed on the damper rod rear end (5); Upward also have one at left cylinder (20) and advance oil drainage hole (22), advance oil drainage hole (22), transport pipe through this and fixedly connected with oil-storing cup (10) with one-way tape stream valve successively.

3, external mounted buffer valve according to claim 2, it is characterized in that: connecting rod (7) is the end of connecting rod (7) and the outside sliding contact of push rod (5) with push rod (5) Connecting format, connecting rod (7) is installed in the sliding sleeve (6), and sliding sleeve (6) is fixed on the valve body (1).

4, external mounted buffer valve according to claim 2 is characterized in that: connecting rod (7) is hinged with the Connecting format of push rod (5).

5, external mounted buffer valve according to claim 1, it is characterized in that: the housing assembly (11) that constitutes one of Slow Close damping device, be fixed on the valve body (1) through link (17), its housing assembly (11) is composed of a fixed connection by left cylinder (20) and right cylinder body (19), the piston of band piston rod (18) is installed in the inner chamber of cylinder body, piston rod (18) stretches out outside the cylinder body through the end face center hole of right cylinder body (19), between the interior edge face of left cylinder (20) and piston, spring (23) is installed, goes up through advancing oil drainage hole (22) at left cylinder (20), transport pipe is fixedlyed connected with oil-storing cup (10) with one-way throttle valve successively.

6, external mounted buffer valve according to claim 5, it is characterized in that: a spring spindle (24) is installed in the end face center hole of left cylinder (20), one end of spring (23) just is installed on the interior edge face of spring spindle (24), is provided with the controlling device of spring spindle (24) in the end face outside of left cylinder (20).

7, external mounted buffer valve according to claim 6, it is characterized in that: the controlling device of spring spindle (24) is for fixing a support (26) in the outer end of left cylinder (20), be equipped with one and regulate bolt (25) in the end-face helical hole of support (26), the inner of bolt (25) contacts with the exterior edge face of spring spindle (24).

8, according to any one the described external mounted buffer valve among the claim 1-7, it is characterized in that: in the inner chamber of valve body (1), be installed with wear-resistant liner (14).

9, according to any one the described external mounted buffer valve among the claim 1-7, it is characterized in that: the contrary stop portion at valve body (1) is installed with a wear-resisting valve nozzle (16).

10, external mounted buffer valve according to claim 8 is characterized in that: the contrary stop portion at valve body (1) is installed with a wear-resisting valve nozzle (16).