CN2140453Y

CN2140453Y - Fluid regulating stop-check valve

Info

Publication number: CN2140453Y
Application number: CN 92210627
Authority: CN
Inventors: 刘铁男; 李振东; 肖尔宽
Original assignee: TIELING VALVE FACTORY LIAONING PROV
Current assignee: TIELING VALVE FACTORY LIAONING PROV
Priority date: 1992-04-10
Filing date: 1992-04-10
Publication date: 1993-08-18
Anticipated expiration: 2002-04-10

Abstract

The utility model relates to a flow regulating stop-check valve which is characterized in that a drive mechanism composed of an umbrella gear set, a nut, a screw rod sleeve and a guide spline is arranged in a valve body and a check mechanism composed of a spring, a guide rod, and a valve clack, and a speed regulating mechanism composed of a piston, a spring, a steel ball and a flow regulating plug; the check mechanism can realize three functions of flow regulation, the stop and the check; the speed regulating mechanism can preset the closing speed in checking, and one valve can replace more valves. Furthermore, the utility model has the advantages of small volume, multiple functions, and low cost.

Description

Fluid regulating stop-check valve

The utility model relates to that a kind of what possess stop valve, safety check, flow control valve function is the valve that uses in the grid system at medium.

Usually, take place, in pipe network, particularly, be provided with stop valve, safety check and flow control valve simultaneously pumping on one section pipeline of oral-lateral for preventing adverse current, pulsation and water hammer.Be in operation,, often produce noise, vibration, eddy current, even produce water hammer, damage pipeline and equipment, make it to be provided with occasion simultaneously and increase, take up the expense height, do not satisfy the requirement of certain operating mode because of above-mentioned three kinds of structural deficiencies of duty valve.

The purpose of this utility model is that a kind of stop valve, safety check, flow control valve function of holding will be provided is the cut-off non-return flow-adjustable valve of one.It can effectively overcome above-mentioned disadvantage, can satisfy the requirement of certain operating mode, and investment cost is reduced, and reduces equipment and takes up space.

The purpose of this utility model is achieved in that and is provided with the driving mechanism of being made up of big bevel pinion group (3,6), nut (17), screw set (15) and guiding spline (2) in valve body; Be provided with the non-return mechanism of forming by check spring (16), guide rod (14) and flap (8), when this mechanism and driving mechanism match, also can become and transfer stream or disabling mechanism; Be provided with the can regulate flap of forming by piston (9), cushion dashpot spring (13), steel ball (12), check valve spring (11) and accent stream plug (10) (8), the controlling mechanism of closing velocity when non-return.Thereby realized that appearance stop valve, safety check, flow control valve function are the valve of one.

Why this valve can hold stop valve, safety check and flow control valve function, is because of in the valve body (1), is provided with driving mechanism, and this mechanism is by bevel pinion (6) and large bevel gear (3) engagement.Nut (17) joins together by the mode and the large bevel gear (3) of key, weldering or casting.Screw set (15) is in nut (17) simultaneously, connect threadably, check spring (16), guide rod (14) are housed in the hole (A) of screw set (15), guide rod (14) is from screw set (15) opening end patchhole (A), screw set (15) the other end is provided with inner splined hole (B), its hole (B) cooperates with guiding spline (2) on the fixing inner valve body (F), but move left and right.When needs end, rotation hand wheel (4) drives the umbrella gear group by axle (5) and rotates, driving nut (17) by the umbrella gear group simultaneously rotates, and nut (17) promotion screw set (15) moves along fixing guiding spline (2), until the edge that makes flap (8) with till elastomer seal (C) closely contacts, thereby realized the function of stop valve.When by such scheme, flap (8) is worked when being in diverse location, actual internal area changes thereupon, from and the function that can realize transferring flow.

In order to realize above-mentioned two kinds of effects, flap (8) and valve body (1) are designed to the fairing of special symmetry, make more stable work reliable.Fall flow resistance, increase work efficiency, prevent to produce vibration, noise and eddy current thereof.This valve why can manner return with the non-return speed-regulating function be one, its reason is to be provided with folk prescription on the one hand to binding flap (8) by pressure of return water control in valve body (1), in case supply water or raw water service pump quit work, so under the pipe network fluid pressure action, just can be self-closing.In order to prevent the destruction of water hammer to pipe-line system, the bowl front, the end at its flap (8) also is provided with the mechanism that can regulate flap (8) motion speed on the one hand.In order to realize governing speed, the piston seat (D) by in the valve body (1) is equipped with piston (9), cushion dashpot spring (13), check valve spring (11) and steel ball (12) successively.The bottom of piston seat (D) is provided with opening (E), is blocked by steel ball (12) at ordinary times, and the sidepiece of piston seat (D) is provided with passage.Locate to be provided with accent stream plug (10) in its T-shaped outlet (G), it is can regulate outlet size in passage, when pump work, under the fluid pressure action that flows out the pump housing, flap (8) is moved to the left, and piston this moment (9) breaks away from the contact with flap, under the effect of damping spring (13), form negative pressure in the piston seat (D), water is just by opening (E), and steel ball (12) flows in the piston seat.When damping spring (13) promoted piston (9) to final position, the interior negative pressure of piston seat (D) disappeared, and under the effect of check valve spring (11), steel ball (12) blocks opening (F), made the water of piston seat (D) can only pass through channel outlet (G) eliminating.When termination of pumping, at short notice, flap (8) is if when preceding pressure is equal to or less than pressure of return water, and under the effect of check spring (16), it is to the direction motion of closing, and then flap will be finished the phase I quick closing valve under the effect of refluence water.Afterwards, contact piston, limit its quick shutoff, and the closing velocity of this moment is realized by the cross section of regulating stream plug (10) control T-shaped mouth (G).Regulate stream plug (10), can adjust the length of second stage shut-in time, embody the characteristics that the two-stage buffering is closed.

An embodiment in reference to the accompanying drawings further explains invention below:

Fig. 1 is a kind of cross-sectional schematic of cut-off non-return modulating valve.1 is valve body among the figure, and 2 are the guiding spline, and 3 is large bevel gear, and 4 is handwheel, 5 is axle, and 6 is bevel pinion, and 7 is guide cover, and 8 is flap, 9 is piston, and 10 for transferring the stream plug, and 11 is check valve spring, and 12 is steel ball, 13 is the cushion dashpot spring, and 14 is guide rod, and 15 is screw set, and 16 is check spring, 17 is nut, and A is the hole, and B is the guiding internal spline, and C is an elastomer seal, D is a piston seat, and E is an opening, and F is an inner valve body, and G is the T-shaped outlet.

The utility model need be under the operating mode of, non-return, accent stream, speed change at it, use ideal, desire this purpose, its working procedure is when supplying water, fluid is pushed flap (8) from the right side of valve open with certain pressure and speed, behind driving mechanism adjustment regulation flow, flap (8) translation is to till silk cylinder sleeve (15) contact, and this moment, fluid was from the left side discharge of valve; When termination of pumping is not supplied water, backwater power and because of flap (8) under the elastic reaction of compressed check spring (16) that move to left, impel flap (8) to move to the direction of closing, finish the non-return effect; When in the non-return motion, avoid water hammer, when speed governing, can realize by the size of transferring stream plug (10) to change T-shaped outlet (G), thereby realize goal of the invention of the present utility model.

The utility model compared with prior art possesses following advantage:

1, therefore the utility model has the function of a valve many valves of generation owing to combine cut-off, non-return and flow regulating valve.

2, the utility model is because flap adopts streamline, and therefore at work, particularly in the process of transferring stream, stable working, flow resistance are little, noiseless and friction.

3, the utility model is owing to be provided with governing system, and when therefore being used for non-return, water hammer is closed and eliminated to two stages of can realizing, reaches the purpose of protection pipeline and valve body.

4, the utility model is because compact conformation compared with prior art, has the advantage that volume is little, in light weight, cost is low.

Claims

1, end a kind of the appearance by valve body (1), non-return, transferring the stream function is the cut-off non-return flow-adjustable valve of one, it is characterized in that in the valve body (1), be provided with by big bevel pinion group (3,6), nut (17), the driving mechanism that screw set (15) and guiding spline (2) are formed, be provided with by check spring (16), the non-return mechanism that guide rod (14) and flap (8) are formed, this mechanism and driving mechanism match, also can become and transfer stream or disabling mechanism, be provided with by piston (9), cushion dashpot spring (13), steel ball (12), the speed regulating mechanism of adjustable valve lobe (8) closing velocity when non-return that check valve spring (11) and accent stream plug (10) are formed.

2, cut-off non-return flow-adjustable valve according to claim 1, it is characterized in that in the said driving mechanism, bevel pinion (6) and large bevel gear (3) engagement, nut (17) is by key, the mode of weldering or casting, combine as a whole with large bevel gear (3), screw set (15) connects in nut (17) threadably, in the hole (A) of screw set (15) check spring (16) is housed, guide rod (14), guide rod (14) is from screw set (15) opening end patchhole (A), screw set (15) the other end is provided with inner splined hole (B), its hole (B) cooperates with guiding spline (2) on being fixed on inner valve body (F), but move left and right.

3, cut-off non-return flow-adjustable valve according to claim 1 is characterized in that said flap (8), makes the fairing with symmetric type.

4, cut-off non-return flow-adjustable valve according to claim 1, it is characterized in that in the said speed regulating mechanism, by the piston seat (D) in the valve body (1), the bottom that piston (9), cushion dashpot spring (13), check valve spring (11) and steel ball (12), piston seat (D) are housed successively is provided with opening (E), blocked by steel ball (12) at ordinary times, the sidepiece of piston seat (D) is provided with passage, locate to be provided with accent stream plug (10) in its T-shaped outlet (G), its is can regulate outlet size in passage.