CN201100461Y

CN201100461Y - Combined control dual petal butterfly check valve

Info

Publication number: CN201100461Y
Application number: CNU2007201946976U
Authority: CN
Inventors: 雷鹏
Original assignee: ANHUI TONGDU VALVE Co Ltd
Current assignee: Anhui Tongdu Flow Technology Co., Ltd.
Priority date: 2007-11-28
Filing date: 2007-11-28
Publication date: 2008-08-13
Anticipated expiration: 2017-11-28

Abstract

The utility model discloses a combination controlled bivalve butterfly check valve which comprises a valve body [1], a valve shaft [2 and 2a], a main valve flap [5] and a buffer device [14], a vice valve flap [11] and a slow closing device [6], wherein the vice valve flap [11] is fixed on the main valve flap [5] on one side of a valve body water exit cavity [15] though a pin shaft, and the main valve flap [5] is opened with a fluid flowing hole matching with the vice valve flap [11]. After the main valve flap is closed, the vice valve flap is slowly closed under the effect of the buffer device, due to the vice valve flap and the slow closing device are controlled by the inlet and outlet pressure difference of the valve, the closed time of the vice valve flap can be precisely adjusted, thereby the effect of eliminating water hammer, preventing medium reflowing and protecting the water pump can be achieved.

Description

Composite control bivalve butterfly check valve

Technical field

The utility model relates to a kind of butterfly check valve with damping device.

Background technique

Butterfly check valve is mainly used in the pump outlet of industrial plumbing, sewage treatment works, prevents pipe network medium adverse current, eliminates destructive water hammer automatically, thereby guarantees that water pump and pipeline are not damaged.This valve mainly is made up of valve body, flap, damping device.At present, butterfly check valve commonly used is the single valve lobe, and the independent loop that damping device is made up of pipeline self medium reaches cushioning effect (waterpower control) or external cushion cylinder reaches cushioning effect (oil pressure control).Adopt the large bore valves cushioning effect of above control mode to be subjected to water pump water supply lift and pressure of return water to influence effect greatly; cushioning effect is not obvious; through regular meeting problems such as flap double hit valve seat, impact noise are big, flap closed the position and flap unlatching, Slow Close time taking place can not accurately regulate, and has a strong impact on pipeline safety.

Summary of the invention

The purpose of this utility model provides a kind of composite control bivalve butterfly check valve, and it is not obvious to solve the large bore valves cushioning effect, the problem that flap is opened, the Slow Close time can not accurately be regulated.

The utility model is achieved in that it comprises valve body, valve shaft, main valve clack and damping device thereof, secondary flap and slow closing device thereof, secondary flap is fixed on by bearing pin on the main valve clack of valve body water chamber one side, has the liquid pass hole that cooperates with secondary flap on the main valve clack.After main valve clack was closed, secondary flap was slowly closed under the effect of its damping device, can improve cushioning effect, prolonged the Slow Close time of valve.

The slow closing device of described secondary flap reaches the water pipe that communicates with the oil hydraulic cylinder front/back cavity by oil hydraulic cylinder and forms, oil hydraulic cylinder is arranged on the valve body of valve shaft one side, the oil hydraulic cylinder front/back cavity communicates into and out of water cavity with valve body by water pipe respectively, the piston rod of oil hydraulic cylinder is connected with secondary flap by soft rope, the length of soft rope makes that secondary flap can cover on the liquid pass hole of main valve clack under cut-off state, utilizes the inlet and outlet pressure difference control of valve.

For convenience secondary flap opens and closes, and secondary flap is hinged on main valve clack by rocking bar, and soft rope one end is fixed on the rocking bar.

With on the water pipe that the oil hydraulic cylinder front/back cavity communicates filter and gate valve are housed, can prevent that so not only the impurity in the fluid from destroying oil hydraulic cylinder, and can regulate the Slow Close time by the flow that gate valve is regulated water pipe.

The utility model has the advantages that and adopt two flaps and two cover damping devices, buffering when flap is closed and Slow Close time are regulated separately.Thereby the main valve clack damping device is used for eliminating the purpose that impact force that adverse current and water hammer because of medium cause flap reaches protection valve sealing face and pipeline; Secondary flap slow closing device is as the shut-in time of regulating secondary flap; because secondary flap slow closing device is the inlet and outlet pressure difference control by valve; so the shut-in time to secondary flap can be regulated accurately, thereby reach the effect of eliminating water hammer and preventing medium counter flow protection water pump.

Description of drawings

Fig. 1 is the utility model structural representation.

Fig. 2 is along A-A line sectional view among Fig. 1.

Fig. 3 be among Fig. 1 B to structural representation.

Fig. 4 is the hydraulic shock absorber structural representation.

Fig. 5 is a waterpower slow closing device structural representation.

Among the above-mentioned figure, 1, valve body, 2-2a, valve shaft, 3 and 3a, taper pin, 4-4a, axle sleeve, 5, main valve clack, 6, waterpower slow closing device, 7, piston rod, 8, soft rope, 9, rocking bar, 10, bearing pin, 11, secondary flap, 12, rocking arm, 13, support, 14, hydraulic shock absorber, 15, water chamber, 16-16a, filter, 17-17a, gate valve, 18-18a, water pipe, 19, water-inlet cavity, 20, liquid pass hole, 21, flow control valve, 22, the bypass oil pipe, 23, piston rod, 24, oil cylinder, 25, ante-chamber, 26, oil hydraulic cylinder, 27, back cavity.

Embodiment

As Fig. 1, shown in Figure 2, the utility model comprises valve body 1,

valve shaft

2 and 2a, main valve clack 5 and hydraulic shock absorber 14 thereof, secondary flap 11 and waterpower slow closing device 6 thereof,

valve shaft

2 and 2a one end are fixed on the valve body 1, main valve clack 5 is provided with axle sleeve 4 and the 4a that connects with

valve shaft

2 and 2a, main valve clack 5 is connected with 2a with valve shaft 2 with 4a by axle sleeve 4 respectively,

axle sleeve

4 and 4a and

valve shaft

2 and 2a fix by

taper pin

3 and 3a respectively, the hydraulic shock absorber 14 of main valve clack is the external hydraulic shock absorber, as shown in Figure 3 and Figure 4, by oil cylinder 24, piston rod 23, bypass oil pipe 22; rocking arm 12 is formed; hydraulic shock absorber 14 is installed on the valve body 1 by support 13; rocking arm 12 1 ends and piston rod 23 are hinged; the other end and valve shaft 2 are connected, and flow control valve 21 is housed on the bypass oil pipe 22.Secondary flap 11 is fixed on by rocking bar 9 and bearing pin 10 on the main valve clack 5 of valve body water chamber 15 1 sides, has the liquid pass hole 20 that cooperates with secondary flap 11 on the main valve clack 5.Secondary flap damping device 6 as shown in Figure 5, by oil hydraulic cylinder 26 and with oil hydraulic cylinder before, back cavity 25, the 27 water pipe 18a that communicate, 18 form, oil hydraulic cylinder 26 is arranged on the valve body 1 of valve shaft 2 one sides, before the oil hydraulic cylinder,

back cavity

25 and 27 respectively by

water pipe

18a and 18 and valve body advance,

water chamber

19 and 15 communicates, piston rod 7 is connected with rocking bar 9 by soft rope 8, the length of soft rope makes that secondary flap 11 can cover on the liquid pass hole 20 of main valve clack 5 under cut-off state, rocking bar 9 one ends and secondary flap 11 are hinged, the other end and pin uranium 10 are hinged, pin uranium 10 two ends are separately fixed at valve pocket 4, on the 4a, water pipe 18, filter 16 is housed respectively on the 18a, 16a and gate valve 17,17a.

Its working principle is as follows:

During turn on pump, pressure medium promotes main valve clack 5 at water-inlet cavity 19, secondary flap 11 is opened, and makes the medium process, and main valve clack 5 drives rocking arm 12 by

valve shaft

2,2a and moves piston rod 22 in the hydraulic shock absorber 14 to enable possition.Piston rod 7 in the secondary flap slow closing device 6 pressure reduction that water-inlet cavity 19 and water chamber 15 media are produced during also by turn on pump draws high the enable possition.

During termination of pumping, because the effect that flap deadweight and medium flow backwards is closed main valve clack 5 automatically.Because the effect of hydraulic shock absorber 14, it is the quick closing valve stage to having moved 63 ° for 78 ° from fully open position in two stages that main valve clack 5 is closed, damping function is very little, damping function strengthens after 63 °, be buffer stage, and the time of buffering can be adjusted by regulating flow control valve 21, after main valve clack 5 is closed, the pressure of water chamber 15 increases, medium moves downward by the back cavity 27 promotion piston rods 7 that water pipe 18 flows to oil hydraulic cylinder 26, slowly close secondary flap 3, the medium of ante-chamber 25 is expelled to valve inleting water chamber 19 by water pipe 18a, and the Slow Close time can be regulated by gate valve 17.

Claims

1, composite control bivalve butterfly check valve, comprise valve body [1], valve shaft [2 and 2a], main valve clack [5] and damping device [14] thereof, it is characterized in that: further comprising a secondary flap [11] and slow closing device [6] thereof, secondary flap [11] is fixed on by bearing pin on the main valve clack [5] of valve body water chamber [15] one sides, has the liquid pass hole [20] that cooperates with secondary flap [11] on the main valve clack [5].

2, composite control bivalve butterfly check valve according to claim 1, it is characterized in that: the slow closing device of described secondary flap [6] by oil hydraulic cylinder [26] and with oil hydraulic cylinder before, back cavity [25,27] water pipe [18a that communicates, 18] form, oil hydraulic cylinder [26] is arranged on the valve body [1] of valve shaft [2 an and 2a] side, before the oil hydraulic cylinder, back cavity [25,27] respectively by water pipe [18 a, 18] advance with valve body, water chamber [19,15] communicate, the piston rod [7] of oil hydraulic cylinder [26] is connected with secondary flap [11] by soft rope [8], and the length of soft rope [8] makes that secondary flap [11] can cover on the liquid pass hole [20] of main valve clack [5] under cut-off state.

3, composite control bivalve butterfly check valve according to claim 2 is characterized in that: secondary flap [11] is hinged on main valve clack [5] by rocking bar [9], and soft rope [8] one ends are fixed on the rocking bar [9].

4, according to claim 2 or 3 described composite control bivalve butterfly check valves, it is characterized in that: with on the water pipe [18a, 18] that oil hydraulic cylinder front/back cavity [25,27] communicates filter [16a, 16] and gate valve [17a, 17] are housed respectively.