CN101994858B

CN101994858B - Air valve for preventing water hammer due to cavities collapsing

Info

Publication number: CN101994858B
Application number: CN201010538212A
Authority: CN
Inventors: 高金良
Original assignee: Harbin Institute of Technology
Current assignee: HARBIN KAINA TECHNOLOGY CO LTD
Priority date: 2010-11-10
Filing date: 2010-11-10
Publication date: 2012-09-26
Anticipated expiration: 2030-11-10
Also published as: CN101994858A

Abstract

The invention relates to an air valve, in particular to an air valve for preventing water hammer due to cavities collapsing, which solves the problems that since the traditional air valve has insufficient air inflow, water hammer due to cavities collapsing can be caused easily. A floating ball supporting plate is connected with the inner wall of the valve body, a through hole is arranged on the floating ball supporting plate, a floating ball supporting rod is inserted in the through hole, a floating ball is fixedly installed at the upper end of the floating ball supporting rod corresponding to a first valve port, and the floating ball is used for controlling the opening and closing of the first valve port; a spring supporting plate is fixedly connected with the inner wall of the valve body, the lower end of a spring guiding rod is fixedly connected with the spring supporting plate, and the upper end of the spring guiding rod is fixedly installed on a second valve port; and a blocking disc is sheathed on the spring guiding rod and corresponds to the second valve port, the upper end of a spring is fixedly connected with the blocking disc, the lower end of the spring is fixedly connected with the spring supporting plate, the spring is sheathed on the spring guiding rod and used for controlling the up-and-down motion of the blocking disc, and the blocking disc is used for controlling the opening and closing of the second valve port. The air valve for preventing water hammer due to cavities collapsing is especially suitable for long-distance waterlines.

Description

That realizes a large amount of air inlets and the exhaust of limiting the quantity of prevents the water hammer due to cavities collapsing air valve

Technical field

The present invention relates to a kind of air valve, be specifically related to a kind of realize a large amount of air inlets and the exhaust of limiting the quantity of prevent the water hammer due to cavities collapsing air valve, belong to waterline protective equipment technical field.

Background technique

In the long distance water transfer project; At some operating conditions; Like the normal and improper keying of pipeline water-filling, emergency repair emptying, valve, the normal and accident start and stop of pump etc.; Can cause pipeline local high spot place often to have a large amount of air or air bag,, can increase pipe resistance even water hammer booster and device damage accident take place if it is not got rid of as early as possible.Confirm that through anti-water hammer analog computation the place need be provided with air inlet in a large number at the pipeline local high spot, the equipment exhaust of limiting the quantity of in order to prevent water hammer due to cavities collapsing simultaneously.The conventional air valve has only a valve port to come intake and exhaust, if will guarantee air inflow, then its air displacement is understood excessive and caused water hammer due to cavities collapsing; If will control air displacement, then air inflow also is restricted, and can not satisfy can the place's air inflow requirement of pipeline local high spot.

Summary of the invention

The objective of the invention is in order to solve existing air valve deficiency of air; Air displacement is uncontrollable; Can't realize a large amount of air inlets and the exhaust of limiting the quantity of; Pipeline local high spot place be prone to produce the problem of water hammer due to cavities collapsing, so provide a kind of realize a large amount of air inlets and the exhaust of limiting the quantity of prevent the water hammer due to cavities collapsing air valve.

Technological scheme of the present invention is: the water hammer due to cavities collapsing air valve that prevents of realizing a large amount of air inlets and the exhaust of limiting the quantity of comprises valve body, first valve gap, ball float, ball float supporting plate, ball float pressure pin, second valve gap, stifled dish, spring, spring conductor rod and spring planet, and the upper end of said valve body is provided with first valve port and second valve port, and first valve gap lid is contained on first valve port; Second valve gap lid is contained on second valve port, and said ball float supporting plate is fixedly connected with the inwall of valve body, has via hole on the ball float supporting plate; Said ball float pressure pin is inserted in the via hole, and the ball float pressure pin slides in via hole, and the upper end of ball float pressure pin is installed with ball float; And the mounting point of ball float is corresponding with first valve port, and ball float is used to control the folding of first valve port, and said spring planet is fixedly connected with the inwall of valve body; The lower end of said spring conductor rod is fixedly connected with spring planet; The upper end of spring conductor rod is fixedly mounted on second valve gap, and stifled dish is sleeved on the spring conductor rod, and the mounting point of stifled dish is corresponding with second valve port; And stifled dish slides on spring conductor rod; Spring housing is contained on the spring conductor rod, and the upper end of spring is fixedly connected with stifled dish, and the lower end of spring is fixedly connected with spring planet; Spring is used to control moving up and down of stifled dish, and stifled dish is used to control the folding of second valve port.

The present invention compared with prior art has following effect: the water hammer due to cavities collapsing air valve that prevents of a large amount of air inlets of realization of the present invention and the exhaust of limiting the quantity of is controlled the intake and exhaust amount through the automatic on-off of valve port; Realize a large amount of air inlets and the exhaust of limiting the quantity of, prevented the generation of water hammer due to cavities collapsing; The present invention also has is convenient to install and use, be convenient to maintenance management and the low advantage of cost.

Description of drawings

Fig. 1 is an integrally-built schematic representation of the present invention, and Fig. 2 is the A-A sectional view of Fig. 1, and Fig. 3 is the B-B sectional view of Fig. 1, and Fig. 4 is the C place partial enlarged drawing of Fig. 2, and Fig. 5 is the plan view of Fig. 1.

Embodiment

Embodiment one: combine Fig. 1-Fig. 3 and Fig. 5 that this mode of execution is described, a large amount of air inlets of the realization of this mode of execution and the exhaust of limiting the quantity of prevent the water hammer due to cavities collapsing air valve comprise valve body 10, first valve gap 1, ball float 4, ball float supporting plate 5, ball float pressure pin 6, second valve gap 7, block up coil 11, spring 12, spring conductor rod 13 and spring planet 14, the upper end of said valve body 10 is provided with first valve port 3 and second valve port 9; First valve gap, 1 lid is contained on first valve port 3, and second valve gap, 7 lids are contained on second valve port 9, and said ball float supporting plate 5 is fixedly connected with the inwall of valve body 10; Have via hole 5-1 on the ball float supporting plate 5, said ball float pressure pin 6 is inserted in the via hole 5-1, and ball float pressure pin 6 slides in via hole 5-1; The upper end of ball float pressure pin 6 is installed with ball float 4; And the mounting point of ball float 4 is corresponding with first valve port 3, and ball float 4 is used to control the folding of first valve port 3, and said spring planet 14 is fixedly connected with the inwall of valve body 10; The lower end of said spring conductor rod 13 is fixedly connected with spring planet 14; The upper end of spring conductor rod 13 is fixedly mounted on second valve gap 7, and stifled dish 11 is sleeved on the spring conductor rod 13, and the mounting point of stifled dish 11 is corresponding with second valve port 9; And stifled dish 11 slides on spring conductor rod 13; Spring 12 is sleeved on the spring conductor rod 13, and the upper end of spring 12 is fixedly connected with stifled dish 11, and the lower end of spring 12 is fixedly connected with spring planet 14; Spring 12 is used to control moving up and down of stifled dish 11, and stifled dish 11 is used to control the folding of second valve port 9.

Embodiment two: combine Fig. 1 that this mode of execution is described; The air valve of this mode of execution also comprises first filter screen 2 and second filter screen 8; First filter screen 2 is fixedly mounted between first valve gap 1 and first valve port 3, and second filter screen 8 is fixedly mounted between second valve gap 7 and second valve port 9.So be provided with, gas is filtered, prevent that foreign material from getting in the air valve.Other composition is identical with embodiment one with annexation.

Embodiment three: combine Fig. 1-Fig. 3 that this mode of execution is described, first filter screen 2 and second filter screen 8 of this mode of execution are stainless steel filtering net.So be provided with, prolong the working life of filter screen.Other composition is identical with embodiment two with annexation.

Embodiment four: combine Fig. 4 that this mode of execution is described, the air valve of this mode of execution also comprises seal ring 15, and said seal ring 15 is fixedly mounted on the lower end inwall of first valve port 3.So be provided with, more effectively controlled the turnover of gas.Other composition is identical with embodiment one, two or three with annexation.

(referring to Fig. 1-Fig. 3): air valve of the present invention is installed in pipeline local high spot place to working principle of the present invention, and when having gas in the pipe-line system, gas can finally accumulate in pipeline local high spot place.When gas gets into valve body 10, accumulate in the valve body 10, along with increasing of gas in the valve body 10, gas can make the water surface in the valve body 10 descend, and ball float 4 drops on the ball float pallet 5 with water level, opens first valve port 3, and gas is discharged; After gas drained, the water surface rose, and ball float 4 rises with water level and closes first valve port 3.When negative pressure occurring in the pipe-line system, system pressure is less than external atmosphere pressure, and the water surface in the valve body 10 descends; Ball float 4 drops on the ball float pallet 5 with water level, opens first valve port 3, and external atmosphere pressure promotes stifled dish 11 declines simultaneously; Spring 12 is compressed, and second valve port 9 is opened, and gas gets in the valve body 10 from first valve port 3 and second valve port 9; Pressure in the supply gas in pipeline, balance line system; After negative pressure in the pipeline disappeared, pipe-line system pressure was greater than external atmosphere pressure, and the waters surface in the valve body 10 rise, and ball float 4 rises with water level, closes first valve port 3, and the spring 12 of compression simultaneously restores to the original state, and stifled dish 11 rises, and blocks second valve port 9.

Claims

One kind realize a large amount of air inlets and the exhaust of limiting the quantity of prevent the water hammer due to cavities collapsing air valve, it comprises valve body (10), first valve gap (1), second valve gap (7), the upper end of said valve body (10) is provided with first valve port (3) and second valve port (9); First valve gap (1) lid is contained on first valve port (3), and second valve gap (7) lid is contained on second valve port (9), it is characterized in that: air valve also comprises ball float (4), ball float supporting plate (5), ball float pressure pin (6), stifled dish (11), spring (12), spring conductor rod (13) and spring planet (14); Said ball float supporting plate (5) is fixedly connected with the inwall of valve body (10); Have via hole (5-1) on the ball float supporting plate (5), said ball float pressure pin (6) is inserted in the via hole (5-1), and ball float pressure pin (6) slides in via hole (5-1); The upper end of ball float pressure pin (6) is installed with ball float (4); And the mounting point of ball float (4) is corresponding with first valve port (3), and ball float (4) is used to control the folding of first valve port (3), and said spring planet (14) is fixedly connected with the inwall of valve body (10); The lower end of said spring conductor rod (13) is fixedly connected with spring planet (14); The upper end of spring conductor rod (13) is fixedly mounted on second valve gap (7), and stifled dish (11) is sleeved on the spring conductor rod (13), and the mounting point of stifled dish (11) is corresponding with second valve port (9); And stifled dish (11) is gone up at spring conductor rod (13) and is slided; Spring (12) is sleeved on the spring conductor rod (13), and the upper end of spring (12) is fixedly connected with stifled dish (11), and the lower end of spring (12) is fixedly connected with spring planet (14); Spring (12) is used to control moving up and down of stifled dish (11), and stifled dish (11) is used to control the folding of second valve port (9).
2. a large amount of air inlets of realization according to claim 1 and the exhaust of limiting the quantity of prevent the water hammer due to cavities collapsing air valve; It is characterized in that: said air valve also comprises first filter screen (2) and second filter screen (8); First filter screen (2) is fixedly mounted between first valve gap (1) and first valve port (3), and second filter screen (8) is fixedly mounted between second valve gap (7) and second valve port (9).
3. a large amount of air inlets of realization according to claim 2 and the exhaust of limiting the quantity of prevent the water hammer due to cavities collapsing air valve, it is characterized in that: first filter screen (2) and second filter screen (8) are stainless steel filtering net.
According to claim 1, a large amount of air inlets of 2 or 3 described realizations and the exhaust of limiting the quantity of prevent the water hammer due to cavities collapsing air valve, it is characterized in that: air valve also comprises seal ring (15), said seal ring (15) is fixedly mounted on the lower end inwall of first valve port (3).