WO2011134272A1

WO2011134272A1 - Eccentric plate valve having slowly-closing and nonreturn function

Info

Publication number: WO2011134272A1
Application number: PCT/CN2011/000537
Authority: WO
Inventors: 荆锁祥
Original assignee: Jing Suoxiang
Priority date: 2010-04-28
Filing date: 2011-03-29
Publication date: 2011-11-03
Also published as: CN102155544B; CN102155544A

Abstract

An eccentric plate valve having a slowly-closing and nonreturn function comprises an eccentric butterfly valve (1). In a valve body of the eccentric butterfly valve (1) is provided a valve plate (2), on whose eccentric axis is fixed a valve rod (3). One end of the valve rod (3) is provided with a swing oil cylinder (4). The structure design of the valve is reasonable and reliable. When the return flow is caused during the power off and shut-down, the valve can be steadily closed. The valve has the advantages of well energy-saving effect, simple and compact structure, low cost in use and convenience service, and is used as a nonreturn valve.

Description

Valve plate eccentric valve with slow closing function

The invention relates to a valve whose valve plate is eccentric, and in particular to a valve with an eccentricity of a valve plate having a slow closing function.

Background technique

At the turbine inlet and the pump outlet, a gate valve (butterfly valve) and a check valve are installed to adjust the operating conditions and prevent backflow and water hammer damage. The existing check valve has a large flow resistance coefficient. The problem of poor slow-closing performance, high installation cost of two valves at the same time, large flow resistance coefficient and high energy consumption, and the butterfly valve is widely used due to its simple structure, small size, light weight, simple operation and good flow control characteristics. Especially when it comes to large-diameter valves, the butterfly valve replaces the gate valve, so the second generation of the butterfly valve (that is, it can be used both as a butterfly valve and as a check valve) is constantly innovating.

The existing liquid control check butterfly valve can realize the check function of the butterfly valve, one threshold and two generations, but there are the following disadvantages:

1. Complex structure, large size, numerous electrical control components, hydraulic control of various types of solenoid valves, hydraulic control valves, cylinders, tubing, joints and accumulators, heavy hammer mechanisms, etc., as long as there is a problem in one link, Affect the reliability of the butterfly valve work; 2. During the long-term continuous operation of the main engine (turbine, pump), the hydraulic control butterfly valve should always start the oil pump to maintain pressure on the hydraulic system and consume energy; 3. The hydraulic control butterfly valve is not the same as the check valve. The pump stops abnormally, no matter whether it is power failure or failure, as long as the pipeline is backed off reliably, but indirectly through the pump before the valve to cut off the electric signal, the solenoid valve acts, close the valve under the action of the weight or accumulator, if the pump before the valve is not Because of power failure, the pump is powered off, the electric appliance and hydraulic control are out of order, and the butterfly can not be closed. 4. Due to the complexity of the structure and control of the hydraulic control butterfly valve, its cost, use and maintenance cost are high, and debugging and maintenance troubles . Summary of the invention

In order to solve the problem that the existing valve plate eccentric valve has large flow resistance coefficient, poor slow closing performance, complicated structure, large energy consumption, poor check reliability and high cost, the invention provides a slow closing function. Valve plate eccentric valve.

The invention is realized by the following technical solutions: a valve plate eccentric valve with a slow closing check function, comprising an eccentric butterfly valve, a valve plate is arranged in the valve body of the eccentric butterfly valve, and a valve stem and a valve stem are fixed on the eccentric axis of the valve plate One end has a swing cylinder. The rocking cylinder is easily realized by those skilled in the art. The eccentric butterfly is used as a check valve, the wide plate can be completely opened and positioned, and the flow resistance coefficient is smaller than that of the existing check valve. The swinging cylinder makes the valve eccentric valve with the slow-closing check function closed. Closed function, simple structure and low energy consumption.

The other end of the valve stem is provided with a worm gear reducer, and a one-way overrunning clutch is connected between the worm gear reducer and the valve stem. The one-way overrunning clutch can adopt at least one known structure of the prior art, and the connection between the worm reducer and the valve stem is connected. The one-way overrunning clutch is easy to realize by a person skilled in the art. The one-way overrunning clutch can be used as a slow-closing check butterfly. The one-way overrunning clutch has the following movement characteristics: the worm wheel speed of the worm gear reducer is nl, The valve stem speed is n2; when the worm gear is the active part, when nl=η2 clutch is engaged; when I - nl I >n2 clutch is over; when the valve stem is the active part, when -ri2 = -nl clutch is engaged; when n2>nl Clutch override; that is, the butterfly valve is opened and closed and the clutch is engaged with the worm wheel when the operating condition is adjusted. When the pipe is closed to close the disc valve, the clutch and the worm wheel are disengaged.

The boss body is fixed with a boss on the outside of the valve plate (ie, the direction of the flow of the pipe in which the valve is located, and the direction of the return flow is the inner side), and the boss is located on the horizontal or vertical plane where the axis of the valve stem is located, during use, when When the valve plate is opened to the maximum position, the valve plate is in contact with the boss to make the positioning of the valve plate smoother. The auxiliary valve plate is hinged on the inner side of the valve plate with a large area on the side of the valve stem. The structure is mainly designed for the valve horizontal installation with the valve plate eccentricity with the slow closing function, and the valve with a large area on the side of the wide rod. When the plate is at the top, when the eccentric valve of the valve plate with the slow-closing function is working normally, the auxiliary valve plate is closed. When the pipe is recirculated, the auxiliary valve plate opens and cooperates with the valve plate under the action of the hydrodynamic pressure. A quick closing of the valve plate is achieved, and when it is nearly closed, the buffer closing is achieved by the swing cylinder.

The rocking cylinder comprises a cylinder body and an outer sleeve located therein and fixed at one end of the valve stem, the inner wall of the cylinder body is fixed with a partition plate in close contact with the outer sleeve, and the piston is fixed on the outer sleeve, and the piston is provided with a one-way valve, the piston A throttle plate is fixed on the inner wall of the cylinder between the partition plate, and the inner surface of the throttle plate is a curved surface structure, and a radial distance between the end of the throttle plate and the end of the baffle is smaller than a distance between the piston and the end of the throttle plate The radial distance from the piston. The structural design is an innovation of the existing swing cylinder, and the structural design is more reasonable and reliable. During operation, when the pump is abnormally stopped, the return of the pipeline acts on the torque torque generated by the valve plate, so that the valve plate is quickly closed, and the valve stem is driven. With the rapid rotation of the piston, as the distance between the piston and the throttle plate is gradually reduced, the pressure in the front chamber of the piston increases continuously, and the piston speed becomes slower and slower until it is closed, thereby realizing the slow closing function of the butterfly valve. When the valve is normally opened, the oil enters the cavity between the piston and the diaphragm through the check valve to avoid the formation of vacuum. When the valve is normally closed, the speed of the worm gear is low, and the speed of the piston is low, so it will not be affected by the section. The impact of the flow board.

The one-way overrunning clutch comprises an outer ring fixed in the worm wheel of the worm gear reducer and an inner ring fixed to the end of the wide rod and located in the outer ring, wherein the corresponding position between the outer ring and the inner ring is provided with a card slot, A pawl is hinged in the slot of the ring, and a spring rod is arranged between the pawl and the bottom of the inner ring slot. This structure is a preferred structure for the existing one-way overrunning clutch, and has a simple structure, no slip, and transmission torque. Large, during operation, the worm gear of the worm gear reducer rotates clockwise, the outer ring presses the pawl to disengage from the inner ring, and the valve plate also rotates clockwise under the torsional moment of the hydrodynamic pressure, opening the valve, and the worm wheel stops. Rotation, pawl self-locking, valve plate positioning; When the worm wheel rotates counterclockwise to drive the outer ring to rotate, the pawl self-locking drives the inner ring and the valve stem to rotate, thereby driving the valve plate to rotate counterclockwise to close; when the pump is abnormally stopped, The backflow of the pipe acts on the valve plate, and the torsional moment generated causes the valve plate to rotate counterclockwise, the inner ring also rotates counterclockwise, the pawl is pressed, the inner ring and the outer ring are disengaged, and the valve plate quickly closes the valve, and the structure is designed to be stable and stable. .

The one-way overrunning clutch comprises an inner sleeve fixed in the worm wheel of the worm gear reducer and a lower sprocket wheel fixed to the end of the wide rod, the spline shaft is fixed in the inner sleeve, and the inner sleeve is fixed on the spline shaft The upper inclined sprocket wheel below and matched with the lower sprocket wheel is another preferred structure for the existing one-way overrunning clutch. The structural design is more reasonable and reliable. When the worm wheel rotates counterclockwise, the worm wheel inner sleeve drives the flower. The key shaft rotates to drive the upper slanting sprocket wheel and the lower slanting sprocket wheel to rotate, thereby driving the valve stem to rotate and closing the valve; when the worm wheel rotates clockwise, the upper sprocket wheel is driven to rotate clockwise to loosen the engagement with the lower sprocket wheel The valve plate opens the valve and is positioned under the action of water flow pressure. When the pump is stopped abnormally, the pipe returns to the valve plate, and the torsional moment generated causes the valve plate to rotate counterclockwise, the upper and lower oblique teeth are disengaged, and the valve plate is fast. Close the valve.

The cylinder block is provided with a pressure gauge and a pressure relay, and an air bag is arranged in the cylinder body. The air bag is used to maintain the pressure of the low pressure oil in the cylinder body, and remote automatic monitoring is performed through the on-site monitoring of the pressure gauge and the pressure relay.

The structural design of the invention is reasonable and reliable, and the recirculation is caused by power failure or shutdown, the valve can be stably closed, the energy saving effect is good, the utility model has the advantages of simple structure, compactness, low use cost and convenient maintenance, and can be used as a valve second generation. Used as a butterfly valve, it can also be used as a check valve.

DRAWINGS

Figure 1 is a schematic structural view of the present invention;

Figure 2 is a cross-sectional view taken along line A-A of Figure 1; Figure 3 is a cross-sectional view taken along line BB of Figure 1;

Figure 4 is a schematic cross-sectional view taken along line C-C of Figure 1;

Figure 5 is a schematic view showing another structure of the one-way overrunning clutch of Figure 1;

Figure 6 is an enlarged schematic view of D in Figure 5.

In the picture: 1-eccentric butterfly valve, 2-valve plate, 3-valve, 4-swing cylinder, 5-worm gear reducer, 6-one-way overrunning clutch, 7-bolt, 8-pressure relay, 9-dial valve Plate, 10-cylinder, 11-outer sleeve, 12-separator, 13-piston, 14-way valve, 15-throttle, 16-balloon, 17-worm gear, 18-outer ring, 19-inner ring , 20-pawl, 21-inner sleeve, 22 - lower sprocket wheel, 23-spline shaft, 24-upper sprocket wheel, 25-spring rod.

detailed description

The eccentric valve of the valve plate having the slow closing function includes an eccentric butterfly valve 1. The valve body of the eccentric butterfly valve 1 is provided with a valve plate 2, and the valve shaft 3 is fixed on the eccentric axis of the valve plate 2, and one end of the valve stem 3 is provided Swing cylinder 4. The other end of the valve stem 3 is provided with a worm gear reducer 5, and a one-way overrunning clutch 6 is connected between the worm gear reducer 5 and the valve stem 3; a boss 7 on the outer side of the valve plate 2 is fixed in the valve body, and the boss 7 is located a horizontal or vertical plane on which the axis of the valve stem 3 is located; a valve plate 9 is hinged on the inside of the valve plate 2 having a larger side area; the rocking cylinder 4 includes a cylinder 10 and is fixed therein and fixed to the valve stem The outer sleeve 11 of the 3-end end is fixed with a partition 12 in close contact with the outer sleeve 11 on the inner wall of the cylinder block 10, and a piston 13 is fixed on the outer sleeve 11, and a check valve 14 is disposed on the piston 13, and the piston 13 and the partition 12 are provided. A throttle plate 15 is fixed on the inner wall of the cylinder block 10. The inner surface of the throttle plate 15 has a curved surface structure, and the radial distance between the throttle plate 15 and the end of the diaphragm 12 is smaller than the throttle. The plate 15 is close to the radial distance between the piston 13 and the end of the piston 13; the one-way overrunning clutch 6 includes an outer ring 18 fixed in the worm wheel 17 of the worm gear reducer 5 and an inner ring 19 fixed to the end of the valve stem 3, a plurality of pawls 20 are hinged on the outer circumferential surface of the inner ring 19; the one-way overrunning clutch 6 is fixed to the worm gear minus The outer ring 18 in the worm wheel 17 of the speedometer 5 and the inner ring 19 fixed to the end of the valve stem 3 and located in the outer ring 18, the corresponding position between the outer ring 18 and the inner ring 19 are provided with a card slot, A pawl 20 is hinged in the slot of the ring 19, and a spring rod 25 is disposed between the pawl 20 and the bottom of the inner ring 19; the one-way overrunning clutch 6 includes an inner joint fixed in the worm wheel 17 of the worm reducer 5. The sleeve 21 and the lower inclined sprocket 22 fixed to the end of the valve stem 3, the spline shaft 23 is fixed in the inner sleeve 21, and the spline shaft 23 is fixed on the lower portion of the inner sleeve 21 and cooperates with the lower sprocket wheel 22 The upper sprocket wheel 24; the cylinder 10 is provided with a pressure relay 8, and the cylinder 10 is provided with an air bag 16. In the specific implementation process, the number of the bosses 7 is two; the inner side of the auxiliary valve plate 9 is fixed with a rib plate, and is deployed by the dynamic pressure of the returning water to be positioned under the action of the ribs; if the pipeline conveys the cleaning medium, From the eccentric butterfly valve 1 in front of the valve plate 2 to the oiling hole of the rocking cylinder 4, the cleaning medium replaces the oil, at this time, the air bag 16 is not required to be installed; or the oil accumulator is directly connected above the rocking cylinder 4, nor is it necessary The air bag 16 is disposed; the adjacent surfaces of the upper slanting sprocket 24 and the lower slanting sprocket 22 are provided with inclined teeth arranged radially around the center of the circle.

Claims

Rights request

1. A valve plate eccentric valve having a slow-closing check function, comprising: an eccentric butterfly valve (1), wherein a valve body (2) and a valve plate (2) are disposed in a valve body of the eccentric butterfly valve (1) A valve stem (3) is fixed on the eccentric axis, and a swing cylinder (4) is provided at one end of the valve stem (3).

2. The eccentricity of the valve plate with the slow-closing check function according to claim 1, characterized in that: the other end of the valve stem (3) is provided with a worm gear reducer (5), a worm gear reducer (5) and Valve stem

(3) A one-way overrunning clutch (6) is connected between them.

3. The eccentric valve of the valve plate having the slow-closing check function according to claim 1 or 2, wherein: a boss (7) located outside the valve plate (2) is fixed in the valve body, and the boss ( 7) Located on a horizontal or vertical plane where the axis of the valve stem (3) is located.

The eccentric valve of the valve plate having the slow-closing check function according to claim 1 or 2, characterized in that: the valve stem (3) is disposed on the inner side of the valve plate (2) having a large side area, and the auxiliary valve is hinged Board (9).

5. The eccentric valve of the valve plate having the slow-closing check function according to claim 3, wherein: the valve plate (3) is hinged with a sub-valve plate on the inner side of the valve plate (2) having a large side area ( 9).

6. The eccentric valve of a valve plate having a slow-closing check function according to claim 2, wherein: the rocking cylinder (4) comprises a cylinder (10) and is located therein and fixed to the valve stem (3) - The outer sleeve (11) of the end, the inner wall of the cylinder block (10) is fixed with a partition plate (12) in close contact with the outer sleeve (11), and a piston (13) is fixed on the outer sleeve (11), and the piston (13) is arranged There is a check valve (14), a throttle plate (15) is fixed on the inner wall of the cylinder (10) between the piston (13) and the partition plate (12), and the inner surface of the throttle plate (15) is a curved surface structure , and the throttle plate (15) is close to the partition plate (12) - the radial distance between the end distance piston (13) is smaller than the diameter between the throttle plate (15) close to the piston (13) - the end distance from the piston (13) Distance.

7. The valve plate eccentric valve having a slow closing check function according to claim 2, characterized in that The one-way overrunning clutch (6) includes an outer ring (18) fixed in the worm wheel (17) of the worm gear reducer (5) and an inner portion fixed to the outer end of the valve stem (3) and located inside the outer ring (18). The corresponding position between the outer ring (18) and the inner ring (19) is provided with a card slot, and the pawl (20) is hinged in the inner groove of the inner ring (19), and the pawl (20) A spring rod (25) is provided between the bottom of the inner ring (19) and the bottom of the card slot.

8. The valve plate eccentric valve with a slow-closing check function according to claim 6, wherein: the one-way overrunning clutch (6) comprises an outer side of the worm gear (17) fixed to the worm gear reducer (5). The ring (18) and the inner ring (19) fixed to the end of the mast (3) and located in the outer ring (18), the corresponding position between the outer ring (18) and the inner ring (19) are opened The groove, the inner ring (19) has a pawl (20) hinged therein, and a spring rod (25) is arranged between the pawl (20) and the bottom of the inner ring (19).

9. The eccentric valve of the valve plate having a slow-closing check function according to claim 6, wherein: the one-way overrunning clutch (6) comprises a worm wheel (17) fixed in the worm gear reducer (5). a sleeve (21) and a lower sprocket (22) fixed to the end of the valve stem (3), and a spline shaft (23) is fixed in the inner sleeve (21), and the spline shaft (23) is fixedly located An upper sprocket (24) below the inner sleeve (21) and mated with the lower sprocket (22).

10. The eccentric valve of the valve plate having the slow-closing check function according to claim 9, wherein the cylinder (10) is provided with a pressure relay (8), and the cylinder (10) is provided with an air bag. (16).