1. Double-rotating-shaft self-resetting flap gate comprises a gate (2) which is positioned in a gate chamber (1) and can rotate around two transverse shafts, and a loose-leaf flap (3) which can be turned upwards on the top of the gate, wherein the transverse shafts comprise an upper rotating shaft (22) and a lower rotating shaft (23), a front shaft sleeve (12) and a rear shaft sleeve (13) are correspondingly fixed on a side wall (11) of the gate chamber, the lower rotating shaft is arranged in the rear shaft sleeve to rotate when the gate is erected, and the upper rotating shaft is arranged in the front shaft sleeve to rotate when the gate is turned over.

2. The upper rotating shaft (22) and the lower rotating shaft (23) are both positioned on one side of the downstream of the gate (2) and are fixed with the gate.

3. The front shaft sleeve (12) and the rear shaft sleeve (13) are semicircular and fixed on the side wall (11) with upward openings, the shaft sleeve comprises an outer ring (51), a lining (52) and a support (53), and a drain hole (54) is formed in the bottom of the outer ring.

4. The side wall (11) is provided with a limiting buffer block (14), and the position height of the limiting buffer block is lower than that of the front shaft sleeve (12).

5. And a notch (21) is arranged in the middle of the upper part of the gate (2).

6. The loose-leaf plate (3) is connected with the bottom of the gate gap (21) through a pin shaft (31), the pin shaft is lower than the edge of the gap, the loose-leaf plate is provided with a cross beam (32), and the length of the cross beam is larger than the width of the gap.

7. The bottom of the gate is provided with a balancing weight (24).

8. The gate (2) system material be steel or alloy, last pivot (22), lower pivot (23), preceding axle sleeve (12) and back axle sleeve (13) system material be steel and nylon, loose-leaf plate (3) system material is aluminum alloy and steel.

Background

The existing electromechanical equipment controlled flap gate technology mainly has two types, one is a hydraulic automatic control flap gate, and the other is a flap gate shown in patent '2015204051178-a simple flap gate'.

The hydraulic automatic control flap gate has the function of automatically adjusting the opening of the gate to maintain the upstream water level, but has the problems of easy damage, incapability of overturning, gate flapping, poor application of small-size gates and the like;

the turnover gate is simple and practical, but can not reset automatically, needs the manual reset, and the gate is big more, and the impact force is big more when overturning, therefore the gate height is limited, and present practical application's gate height is not more than 1.3 m.

Disclosure of Invention

The invention aims to improve the turnover gate, increase the automatic reset function, enhance the buffer performance of the gate when the gate is turned over, enlarge the applicable size range of the gate and provide a scheme for replacing a hydraulic automatic control flap gate.

The invention is realized by the following technical scheme:

the double-shaft self-resetting flap gate comprises a gate which is positioned in a gate chamber and can rotate around double transverse shafts, and a flap plate which can be turned up on the top of the gate, wherein the transverse shafts comprise an upper transverse shaft and a lower transverse shaft, a front shaft sleeve and a rear shaft sleeve are correspondingly arranged on the side wall of the gate chamber, the lower transverse shaft is arranged in the rear shaft sleeve to rotate when the gate is erected, and the upper transverse shaft is arranged in the front shaft sleeve to rotate when the gate is turned over.

The upper rotating shaft and the lower rotating shaft are both positioned on one side of the downstream of the gate and are fixed with the gate.

The front shaft sleeve and the rear shaft sleeve are semicircular and are fixed on the side wall, the opening of the front shaft sleeve and the rear shaft sleeve is upward, and a lining is arranged in the shaft sleeve.

The lock chamber side wall is equipped with spacing buffer block, and the position height is less than preceding axle sleeve.

The gate structure is characterized in that a gap is formed in the middle of the top of the gate, the loose-leaf plate is connected with the bottom of the gap of the gate through a pin shaft, the pin shaft is lower than the edge of the gap, a beam is arranged on the loose-leaf plate, and the length of the beam is larger than the width of the gap.

And a balancing weight is arranged at the bottom of the gate.

The side edge and the bottom edge of the gate are respectively provided with a side water stop and a bottom water stop, the section of the side water stop is U-shaped, and the section of the bottom water stop is I-shaped.

The gate is made of steel plates or alloy, the rotating shaft and the shaft sleeve are made of steel and nylon, and the loose-leaf plates are made of aluminum alloy and steel. The side water stop and the bottom water stop are made of rubber or other flexible materials.

The flap gate provided by the invention can vertically retain water in case of dry water, and the loose-leaf flap is submerged under normal water level in a flat lying manner. When the flow exceeds the set flow, the loose-leaf plate is turned upwards to block the gap, the gate is turned downwards under the increment hydrostatic pressure and the hydrodynamic pressure and sequentially contacts the front shaft sleeve and the limiting buffer block, and full-open flood discharge is achieved. When the flood flow is lower than the set value, the gate automatically erects to reset by the balance weight and the hydrostatic pressure.

Compared with the prior art, the invention has the beneficial effects that: the impact force generated when the gate is overturned can be remarkably buffered, the water retaining height of the overturning gate is improved, and the gate is automatically reset.

Drawings

FIG. 1 is a vertical elevational view of the gate of the present invention;

FIG. 2 is a top plan view of the gate of the present invention when erected;

FIG. 3 is a side elevational view of the gate of the present invention when erected;

FIG. 4 is a side view of the gate of the present invention at its maximum tip-over angle;

FIG. 5 is an elevational view of the bushing of the present invention;

fig. 6 is a side view of the bushing of the present invention.

In the figure: 1-gate chamber, 11-side wall, 12-front shaft sleeve, 13-rear shaft sleeve, 14-limit buffer block, 2-gate, 21-notch, 22-upper rotating shaft, 23-lower rotating shaft, 24-counterweight block, 3-loose leaf plate, 31-pin shaft, 32-cross beam, 41-side water stop, 42-bottom water stop, 51-outer ring, 52-inner liner, 53-support piece and 54-drain hole.

Detailed Description

To facilitate understanding of those skilled in the art, the present invention is described in further detail below with reference to the accompanying drawings and specific embodiments.

As shown in the figures 1-6, the double-rotating-shaft self-resetting flap gate has the clear width of a gate chamber 1 of 1.7m, the height of a gate 2 of 1.8m, the height of a gap 21 of 0.3m and the width of 1.14m, namely the normal height of an upstream water retaining plate is 1.5m, the height from a lower rotating shaft 23 to the bottom of the gate chamber is 0.65m, and the distance from an upper rotating shaft 22 to the center of the lower rotating shaft 23 is 0.2 m. When the upstream normal water retaining height is 1.5m, the total weight of the gate 2 is 947kg, and the counter weight block 24 is 472kg, the comprehensive moment (friction not counted) borne by the gate 2 is-330 kgm, which indicates that the gate 2 is stable in normal water retaining. When the upstream water depth reaches 2.1m, the combined moment of hydrostatic pressure and gravity borne by the gate 2 under the condition that the loose-leaf plate 3 is turned up is 46.4kgm, and the gate 2 is mainly promoted to turn over by the hydrodynamic pressure, so that the gate 2 is more reliable to turn over in the flood period. When the gate 2 is turned over and laid flat, the reset moment of the gate 2 is 107kgm when the impact force of water does not exist, and the reset moment is assisted by certain water pressure during reset, which indicates that the reset reliability of the gate is higher.

Preferably, the side wall 11 is cast in situ by using reinforced concrete, and a welding steel plate and a water stop edge strip required by the front shaft sleeve 12, the rear shaft sleeve 13 and the limiting buffer block 14 are embedded in the side wall 11.

Preferably, the gate 2 is made of a steel plate, the upper rotating shaft 22 and the lower rotating shaft 23 are made of round steel, and the counterweight block 24 is made of concrete with a large specific gravity and is cast in place or prefabricated in a factory. The loose-leaf plate 3 is made of a light aluminum alloy material, the pin shaft 31 and the cross beam 32 are made of steel, and the loose-leaf plate is manufactured in a factory.

The front shaft sleeve 12, the rear shaft sleeve 13 and the limiting buffer block 14 are manufactured in a factory and then welded to the embedded part of the side wall 11 on site.

The gate side water stop 41 and the bottom water stop 42 are made of rubber.

The gate 2 is hoisted in place on site, and the loose-leaf plate 3 is installed on the gate 2 on site.

The working process in this embodiment:

in the dry period, when the inflow is small, the gate 2 is erected for retaining water, the water level fluctuates up and down in the gap 21, the residual water overflows from the gap, and the loose-leaf plate is submerged under the normal water level in a flat state; in flood period, the flow of incoming water increases, when the water level exceeded and is set up, loose-leaf plate 3 upwards turned up around round pin axle 31 under the flood impact, crossbeam 32 card is on gate breach both sides, make loose-leaf plate 3 block up gate breach 21, increase the turning moment in the twinkling of an eye, make gate 2 unbalance, turn over downstream around pivot 23 down, before gate 2 did not turn over the position completely, last pivot 22 contacted preceding axle sleeve 12 earlier, buffer most rotatory impact force, the gate contacts spacing buffer block 14 again, later because the impact force of flood to the oblique loose-leaf plate 3 of hectare, gate 2 keeps arranging in on preceding axle sleeve 12 and spacing buffer block 14, reach full-open flood discharge.

When the incoming water flow becomes small, the water level is reduced, and the strength of flood impacting the loose-leaf plate 3 is reduced, the reset moment formed by the counter weight block 24 and hydrostatic pressure starts to act, so that the gate 2 is turned up to reset, and the loose-leaf plate 3 returns to the flat lying state.

The above embodiment is that the front bushing 12 and the rear bushing 13 are located at the horizontal position, which is a preferred implementation manner of the specific specification of the present invention, and is not a limitation on the location of the bushings of the present invention, and on the premise of not departing from the inventive concept of the present invention, the manner in which the two bushings do not play the same role of buffering at the horizontal position, the manner in which the gate is provided with a plurality of loose-leaf plates on top to increase the turning moment, and any simple modification, equivalent replacement, improvement and the like made according to the technical essence of the present invention are within the protection scope of the present invention.