A kind of small-sized water power station front pool sand sluice anti-freezing device

Abstract

The application discloses a kind of small-sized water power station front pool sand sluice anti-freezing device, it includes upstream side anti-freezing mechanism and downstream side anti-freezing mechanism, the upstream side anti-freezing mechanism includes first heat preservation plate and water spraying component, the first heat preservation plate is fixedly installed in the upstream side of the pier, the first heat preservation plate is enclosed with the breast wall first heat preservation cavity, the upstream side of the gate is located in the first heat preservation cavity, the water spraying component is used to the gate is sprayed with water;The downstream side anti-freezing mechanism includes second heat preservation plate, the second heat preservation plate is fixedly installed in the downstream side of the pier, the second heat preservation plate is enclosed with the breast wall second heat preservation cavity, the downstream side of the gate is located in the second heat preservation cavity.The beneficial effects of the application are: effectively solve the problem that water power station sand sluice is frozen in winter operation, before and after gate is easily frozen ice.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydropower station engineering, and particularly relates to a front pool sand flushing gate anti-freezing device of a small hydropower station. BACKGROUND

[0002] The main function of the sand flushing gate is to use water flow to flush the silt accumulated in front of the intake through the opening of the gate, so as to reduce the silt elevation and ensure the normal operation of the intake.

[0003] The utility model discloses a kind of combination structure of drift gate and sand flushing gate, including gate hole, overflow weir is set in middle part of gate hole, overflow weir crest overflow passage is drift passage, drift passage sets drift gate;Overflow weir bottom and gate bottom plate passage is sand flushing passage, sand flushing passage sets sand flushing gate, overflow weir is concrete structure, gate hole is set on the upstream side of overflow weir with access gate.

[0004] The above hydropower station is located in high-cold area, and the front and rear of the sand flushing gate of the hydropower station are prone to freeze in winter operation. The whole ice in front of the gate can wrap the opening and closing screw rod, and the gate slot is frozen to death, so that the gate cannot be opened and water cannot be discharged. SUMMARY

[0005] The present application aims to overcome the above technical deficiencies and provide a front pool sand flushing gate anti-freezing device of a small hydropower station, which solves the technical problem that the front and rear of the sand flushing gate of a hydropower station located in high-cold area are prone to freeze in winter operation, and the whole ice in front of the gate can wrap the opening and closing screw rod, and the gate slot is frozen to death, so that the gate cannot be opened and water cannot be discharged.

[0006] To achieve the above technical purpose, the technical scheme of the present application provides a front pool sand flushing gate anti-freezing device of a small hydropower station, which includes a gate pier, a breast wall and a gate, characterized in that the front pool sand flushing gate anti-freezing device of the small hydropower station comprises:

[0007] An upstream side anti-freezing mechanism, which comprises a first heat preservation plate and a water spraying assembly, the first heat preservation plate is fixedly installed on the upstream side of the gate pier, a first heat preservation cavity is formed between the first heat preservation plate and the breast wall, the upstream side of the gate is located in the first heat preservation cavity, and the water spraying assembly is used for spraying water to the gate;

[0008] A downstream side anti-freezing mechanism, which comprises a second heat preservation plate, the second heat preservation plate is fixedly installed on the downstream side of the gate pier, a second heat preservation cavity is formed between the second heat preservation plate and the breast wall, and the downstream side of the gate is located in the second heat preservation cavity.

[0009] Further, the sand flushing gate further comprises a gate pier top plate and an overflow weir, the gate pier top plate is cast on the top of the gate pier, the overflow weir is cast on the upstream side of the gate pier and forms an overflow weir waterway outside the gate pier, and the first heat preservation plate is fixedly installed between the gate pier top plate and the top of the overflow weir.

[0010] Further, the upstream side anti-freezing mechanism further comprises a first soft curtain, which is detachably installed on the upstream side of the gate pier and located below the top of the overflow weir to the water surface.

[0011] Further, the water spraying assembly comprises a flower pipe and a driving pump, the flower pipe is vertically arranged below the water surface on the upstream side of the gate pier, a plurality of water spraying holes are formed in the flower pipe for spraying water to the gate, and the outlet end of the driving pump is connected with the water inlet of the flower pipe and used for pumping water into the flower pipe.

[0012] Further, a blocking plate is fixedly installed at the top of the flower pipe, a through hole is formed in the middle of the blocking plate, a plurality of water spraying holes are equidistantly distributed on the flower pipe, and each position has two water spraying holes, and the included angle between the two water spraying holes is 45°.

[0013] Further, the top of the flower pipe is located at a position 50 cm below the water surface, the outlet end of the driving pump is connected with the bottom of the flower pipe, and the driving pump is located at the height of the top of the gate leaf.

[0014] Further, the upstream side anti-freezing mechanism further comprises a horizontal steel pipe and a winch, the horizontal steel pipe is fixedly connected with the middle of the flower pipe and used for supporting the flower pipe, and the winch is fixedly installed on the gate pier top plate, the steel wire rope of the winch is fixedly connected with both ends of the horizontal steel pipe and used for hoisting the horizontal steel pipe.

[0015] Further, the downstream side anti-freezing mechanism further comprises a second soft curtain and two hot air machines, the second soft curtain is detachably installed on the downstream side of the gate pier, the second soft curtain is located below the second heat preservation plate, and the two hot air machines are arranged in the second heat preservation cavity and used for providing hot air to the gate.

[0016] Further, the downstream side anti-freezing mechanism further comprises a driving mechanism, the driving mechanism comprises a horizontal screw rod, two movable rods, a first bevel gear, a rotating shaft, a second bevel gear and a rotating driving piece, two ends of the horizontal screw rod are rotationally connected with the pier, two sections of threads with opposite rotation directions are arranged on the horizontal screw rod, screw holes are formed in top ends of the two movable rods, the two movable rods are threadedly connected with the two threads through the corresponding screw holes, the two hot air machines are detachably installed at bottom portions of the two movable rods, the first bevel gear is fixedly installed at one end of the horizontal screw rod, the rotating shaft is rotationally connected with a top plate of the pier, the second bevel gear is fixedly installed at a bottom portion of the rotating shaft, and the second bevel gear is engaged with the first bevel gear, and the rotating driving piece is connected with the rotating shaft and used for driving the rotating shaft to rotate.

[0017] Further, the downstream side anti-freezing mechanism further comprises a wind pipe, the wind pipe is fixedly installed at a bottom portion of the breast wall, one end of the wind pipe corresponds to the air outlet of the hot air machine, and the other end of the wind pipe corresponds to the gate.

[0018] Compared with the prior art, the beneficial effects of the present application include: in the cold winter season, by installing the first heat preservation plate on the upstream side of the pier, a first heat preservation cavity is formed between the first heat preservation plate and the breast wall, so that the temperature in the first heat preservation cavity is increased, and by controlling the water spraying assembly, the water spraying assembly can spray water to the gate, so that disturbance is formed on the upstream side of the pier, and the upstream side of the breast wall and the gate can be prevented from being frozen; by installing the second heat preservation plate on the downstream side of the pier, a second heat preservation cavity is formed between the second heat preservation plate and the breast wall, so that the temperature in the second heat preservation cavity is increased, and the downstream side of the breast wall and the gate can be prevented from being frozen; the upstream side anti-freezing mechanism and the downstream side anti-freezing mechanism are respectively arranged on the upstream side and the downstream side of the gate, so that the problem that the front and rear of the gate are easily frozen in the winter operation of the sand flushing gate of the small hydropower station is effectively solved, the problem that the gate cannot be opened due to the overall freezing of the front of the gate, so that the opening and closing screw rod is wrapped, the gate slot is frozen and cannot be opened, and the problem that water cannot be discharged are avoided, and the sand flushing gate can be normally used for sand flushing and water discharge in winter. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a perspective structural schematic view of the small hydropower station front pool sand flushing gate anti-freezing device in the present application;

[0020] Figure 2 is Figure 1 is a sectional view of the small hydropower station front pool sand flushing gate anti-freezing device in the present application;

[0021] Figure 3 is Figure 2 is a structural schematic view of the small hydropower station front pool sand flushing gate anti-freezing device in the present application;

[0022] Figure 4 is Figure 2 is a sectional view of the second heat preservation plate and the second soft curtain are omitted in the middle;

[0023] Figure 5 is Figure 2 is a schematic diagram of the flower tube in the middle;

[0024] Figure 6 is Figure 4 is a schematic diagram of the heat blower and the driving mechanism connection relationship in the middle. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application, and are not used to limit the present application.

[0026] The present application provides a kind of small hydropower station front pool sand flushing lock anti-freezing device, the sand flushing lock 1 including pier 11, parapet 12 and gate 13, the small hydropower station front pool sand flushing lock anti-freezing device, its structure as shown in Figures 1-3 Including upstream side anti-freezing mechanism 2 and downstream side anti-freezing mechanism 3, the upstream side anti-freezing mechanism 2 includes first heat preservation plate 21 and water spraying assembly 22, the first heat preservation plate 21 is fixedly installed on the upstream side of the pier 11, the first heat preservation plate 21 and the parapet 12 are enclosed first heat preservation cavity 23, the upstream side of the gate 13 is located in the first heat preservation cavity 23, the water spraying assembly 22 is used to water spray to the gate 13;The downstream side anti-freezing mechanism 3 includes second heat preservation plate 31, the second heat preservation plate 31 is fixedly installed on the downstream side of the pier 11, the second heat preservation plate 31 and the parapet 12 are enclosed second heat preservation cavity 32, the downstream side of the gate 13 is located in the second heat preservation cavity 32.

[0027] In the cold season of winter, the first heat preservation plate 21 is installed on the upstream side of the gate pier 11, so that the first heat preservation plate 21 and the parapet 12 form the first heat preservation cavity 23, so as to improve the temperature in the first heat preservation cavity 23, and by controlling the water spraying assembly 22, the water spraying assembly 22 can spray water to the gate 13, so as to form disturbance on the upstream side of the gate pier 11, so as to avoid the upstream side of the parapet 12 and the gate 13 from being frozen, and the second heat preservation plate 31 is installed on the downstream side of the gate pier 11, so that the second heat preservation plate 31 and the parapet 12 form the second heat preservation cavity 32, so as to improve the temperature in the second heat preservation cavity 32, and then the downstream side of the parapet 12 and the gate 13 can be prevented from being frozen. The upstream side anti-freezing mechanism 2 and the downstream side anti-freezing mechanism 3 are arranged on the upstream side and the downstream side of the gate 13 respectively, so that the problem that the front and back of the gate 13 are easily frozen in the winter operation of the sand flushing gate 1 of the hydropower station is effectively solved, so that the problem that the gate 13 cannot be opened due to the fact that the whole front of the gate 13 is frozen, so that the opening and closing screw rod is wrapped, the gate 13 groove is frozen and dead, and the gate 13 cannot be opened and discharged is avoided, and the sand flushing gate 1 can be normally sand flushed and discharged in winter.

[0028] As a preferred embodiment, refer to Figure 1 The sand flushing gate 1 further comprises a gate pier top plate 14 and an overflow weir 15, the gate pier top plate 14 is cast on the top of the gate pier 11, the overflow weir 15 is cast on the upstream side of the gate pier 11 and forms an overflow weir waterway 16 outside the gate pier 11, the first heat preservation plate 21 is fixedly installed between the gate pier top plate 14 and the top of the overflow weir 15, the height difference between the gate pier top plate 14 and the top of the overflow weir 15 is 1.0 m, and a first square tube 211 is arranged on the first heat preservation plate 21, the first square tube 211 is used for reinforcing and fixing the first heat preservation plate 21 to prevent the first heat preservation plate 21 from being blown off by strong wind in winter.

[0029] As a preferred embodiment, refer to Figure 3 The upstream side anti-freezing mechanism 2 further comprises a first soft curtain 24, the first soft curtain 24 is detachably installed on the upstream side of the gate pier 11 and located below the top of the overflow weir 15 to the water surface part, is used for preventing cold air from entering into the first heat preservation cavity 23 from the part below the top of the overflow weir 15 to the water surface part, and the first soft curtain 24 can be removed in summer, which is beneficial to sand flushing and water discharge of the sand flushing gate 1.

[0030] As a preferred embodiment, refer to Figure 2The water spraying assembly 22 comprises a flower pipe 221 and a driving pump 222. The flower pipe 221 is vertically arranged below the water surface on the upstream side of the gate pier 11. A plurality of water spraying holes 2211 are formed in the flower pipe 221 for spraying water to the gate 13. The outlet end of the driving pump 222 is connected with the water inlet of the flower pipe 221 and is used for pumping water into the flower pipe 221. By controlling the driving pump 222, the driving pump 222 can pump water into the flower pipe 221, and the water is sprayed from the water spraying holes 2211 formed in the flower pipe 221 to the gate 13.

[0031] As a preferred embodiment, please refer to Figure 5 The top of the flower pipe 221 is fixedly installed with a blocking plate 2212, and a through hole 2213 is formed in the middle of the blocking plate 2212. The length of the flower pipe 221 is 4 m, and a DN50 steel pipe is adopted. A plurality of water spraying holes 2211 are equidistantly distributed on the flower pipe 221, and the hole distance is 50 cm. The diameter of the water spraying hole 2211 is 8 mm, and there are two water spraying holes 2211 at each position. The included angle between the two water spraying holes 2211 is 45°, which facilitates the water spraying holes 2211 to spray water to both sides of the gate 13.

[0032] As a preferred embodiment, the top of the flower pipe 221 is located at a position 50 cm below the water surface. The outlet end of the driving pump 222 is connected with the bottom of the flower pipe 221, and the driving pump 222 is located at the height of the top of the gate leaf of the gate 13, which facilitates the water spraying holes 2211 on the flower pipe 221 to spray water to each height of the gate 13.

[0033] As a preferred embodiment, please refer to Figure 2 The upstream side anti-freezing mechanism 2 further comprises a horizontal steel pipe 25 and a winch 26. The horizontal steel pipe 25 is fixedly connected with the middle of the flower pipe 221 and is used for supporting the flower pipe 221 and facilitating the control of the direction of the water spraying holes 2211 on the flower pipe 221, so that the water spraying holes 2211 can always spray water to the gate 13. The winch 26 is fixedly installed on the gate pier top plate 14. The steel wire rope of the winch 26 is fixedly connected with both ends of the horizontal steel pipe 25 and is used for hoisting the horizontal steel pipe 25. By controlling the winch 26, the horizontal steel pipe 25 can be lifted out of or put into the water, so that the flower pipe 221 and the driving pump 222 can be lifted out of or put into the water. In summer, the flower pipe 221 and the driving pump 222 can be lifted out of the water surface for standby.

[0034] As a preferred embodiment, please refer to Figures 2-3, the downstream side anti-freezing mechanism 3 further comprises a second soft door curtain 33 and two hot air machines 34, the second soft door curtain 33 is detachably installed on the downstream side of the pier 11, the second soft door curtain 33 is located below the second heat preservation plate 31, a second square tube 311 is arranged on the second heat preservation plate 31, the second square tube 311 is used for reinforcing and fixing the second heat preservation plate 31, preventing the second heat preservation plate 31 from being blown away by strong wind in winter, and the second soft door curtain 33 is removed in summer, which is beneficial to the sand flushing and water discharge of the sand flushing gate 1, and the two hot air machines 34 are arranged in the second heat preservation cavity 32 and used for providing hot air to the gate 13.

[0035] As a preferred embodiment, refer to Figure 4 and Figure 6 , the downstream side anti-freezing mechanism 3 further comprises a driving mechanism 35, the driving mechanism 35 comprises a horizontal screw rod 351, two movable rods 352, a first bevel gear 353, a rotating shaft 354, a second bevel gear 355 and a rotating driving part 356, two ends of the horizontal screw rod 351 are rotationally connected with the pier 11, two sections of threads with opposite rotation directions are arranged on the horizontal screw rod 351, screw holes are formed in the upper ends of the two movable rods 352, the two movable rods 352 are respectively threadedly connected to the two threads via the corresponding screw holes, the two hot air machines 34 are respectively detachably installed at the bottom of the two movable rods 352, the first bevel gear 353 is fixedly installed at one end of the horizontal screw rod 351, the rotating shaft 354 is rotationally connected with the top plate 14 of the pier at the top, the second bevel gear 355 is fixedly installed at the bottom of the rotating shaft 354, and the second bevel gear 355 is engaged with the first bevel gear 353, the rotating driving part 356 is connected with the rotating shaft 354 and used for driving the rotating shaft 354 to rotate, by controlling the rotating driving part 356, the rotating driving part 356 can drive the rotating shaft 354 to rotate, and then drive the second bevel gear 355 to rotate, and drive the first bevel gear 353 to rotate, and further drive the horizontal screw rod 351 to rotate, and further drive the two movable rods 352 to move close to or away from each other, so as to drive the two hot air machines 34 to move close to or away from each other along the horizontal screw rod 351, and then move along the width direction of the gate 13, so that the gate 13 can be blown by hot air at each position.

[0036] As a preferred embodiment, refer to Figures 3-4The downstream side anti-freezing mechanism 3 further comprises air pipes 36, which are fixedly installed at the bottom of the parapet 12, one end of each of the air pipes 36 corresponds to the air outlet of the hot air fan 34, and the other end of each of the air pipes 36 corresponds to the gate 13, so that the air blown by the hot air fan 34 can be directly sent to the gate 13 through the air pipes 36, thereby improving the heating effect on the gate 13.

[0037] For a better understanding of the present application, the following describes the present application in detail Figures 1-6 The working principle of the technical scheme of the present application is described in detail as follows:

[0038] In the cold season of winter, by installing the first heat preservation plate 21 and the first soft door curtain 24 on the upstream side of the gate pier 11, the first heat preservation plate 21, the first soft door curtain 24 and the parapet 12 form the first heat preservation cavity 23, so as to improve the temperature in the first heat preservation cavity 23, and by controlling the drive pump 222, the drive pump 222 can pump water into the flower pipe 221, and the flower pipe 221 sprays water to the gate 13 through the water spraying hole 2211, so as to form disturbance on the upstream side of the gate pier 11, and the upstream side of the parapet 12 and the gate 13 can be prevented from freezing. At the same time, by controlling the winch 26, the horizontal steel pipe 25 can be lifted out of or put into water, so that the flower pipe 221 and the drive pump 222 can be lifted out of or put into water. In summer, the flower pipe 221 and the drive pump 222 are lifted out of water surface for standby. By installing the second heat preservation plate 31 and the second soft door curtain 33 on the downstream side of the gate pier 11, the second heat preservation plate 31, the second soft door curtain 33 and the parapet 12 form the second heat preservation cavity 32, so as to improve the temperature in the second heat preservation cavity 32, and the downstream side of the parapet 12 and the gate 13 can be prevented from freezing. At the same time, by controlling the hot air machine 34, the hot air machine 34 can provide hot air to the gate 13 to prevent the gate 13 from freezing. By controlling the rotating drive part 356, the rotating drive part 356 drives the rotating shaft 354 to rotate, and drives the second bevel gear 355 to rotate, and drives the first bevel gear 353 to rotate, and further drives the two movable rods 352 to move close to or away from each other, so as to drive the two hot air machines 34 to move close to or away from each other along the horizontal screw rod 351, and further move along the width direction of the gate 13, so that the gate 13 can be blown by hot air at each position. The application effectively solves the problem that the front and rear of the gate 13 are prone to freeze in winter operation of the sand flushing gate of the hydropower station, so as to avoid the problem that the gate 13 cannot be opened due to overall freezing, and the gate 13 cannot be discharged, and effectively ensures that the sand flushing gate 1 can normally flush sand and discharge water in winter.

[0039] The small hydropower station front pool sand flushing gate anti-freezing device has the following beneficial effects:

[0040] (1) In the cold winter season, by installing the first insulation board 21 and the first soft curtain 24 on the upstream side of the gate pier 11, the first insulation board 21, the first soft curtain 24 and the breast wall 12 form the first insulation cavity 23, thereby increasing the temperature inside the first insulation cavity 23. By operating the drive pump 222, the drive pump 222 can pump water into the flower pipe 221, and the flower pipe 221 sprays water into the gate 13 through the spray hole 2211, thereby creating a disturbance on the upstream side of the gate pier 11, which can prevent the upstream side of the breast wall 12 and the gate 13 from freezing. At the same time, by operating the winch 26, the horizontal steel pipe 25 can be lifted out or put into the water, thereby allowing the flower pipe 221 and the drive pump 222 to be lifted out or put into the water. In summer, the flower pipe 221 and the drive pump 222 can be lifted out of the water for use.

[0041] (2) By installing the second insulation board 31 and the second flexible curtain 33 on the downstream side of the gate pier 11, the second insulation board 31, the second flexible curtain 33 and the breast wall 12 form the second insulation cavity 32, thereby increasing the temperature inside the second insulation cavity 32, thus preventing ice formation on the downstream side of the breast wall 12 and the gate 13. At the same time, by operating the hot air blower 34, the hot air blower 34 can provide hot air to the gate 13, preventing the gate 13 from freezing. By operating the rotating drive component 35... 6. The rotating drive 356 can drive the rotating shaft 354 to rotate, which in turn drives the second bevel gear 355 to rotate, and drives the first bevel gear 353 to rotate, which in turn drives the horizontal lead screw 351 to rotate. Furthermore, it can drive the two movable rods 352 to move closer or further away from each other, thereby driving the two hot air blowers 34 to move closer or further away from each other along the horizontal lead screw 351, and thus move along the width direction of the gate 13 so that hot air can be blown at every position of the gate 13.

[0042] (3) The present invention effectively solves the problem that the front and back of the gate 13 are easily frozen during the operation of the sand flushing gate of the hydropower station in winter, thereby avoiding the problem that the gate 13 cannot be opened and water cannot be discharged because the front of the gate 13 is completely frozen, resulting in the opening and closing screw being wrapped and the gate 13 groove being frozen. This effectively ensures that the sand flushing gate 1 can flush sand and discharge water normally in winter.

[0043] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A de-icing device for a sand sluice of a forebay of a small hydropower plant, the sand sluice comprising a pier, a parapet and a gate, characterized in that, The small hydropower station front pool sand sluice freeze-proof device comprises: The sand sluice further comprises a pier top plate and an overflow weir, the pier top plate is cast on the top of the pier, and the overflow weir is cast on the upstream side of the pier and forms an overflow weir waterway outside the pier. The upstream side freeze-proof mechanism comprises a first heat preservation plate and a water spraying assembly, the first heat preservation plate is fixedly installed on the upstream side of the pier, the first heat preservation plate is fixedly installed between the pier top plate and the top of the overflow weir, a first heat preservation cavity is formed between the first heat preservation plate and the parapet, and the upstream side of the gate is located in the first heat preservation cavity. The downstream side freeze-proof mechanism comprises a second heat preservation plate, a second soft curtain, two hot air machines and a driving mechanism, the second heat preservation plate is fixedly installed on the downstream side of the pier, a second heat preservation cavity is formed between the second heat preservation plate and the parapet, the downstream side of the gate is located in the second heat preservation cavity, the second soft curtain is detachably installed on the downstream side of the pier, the second soft curtain is located below the second heat preservation plate, the two hot air machines are arranged in the second heat preservation cavity and used for providing hot air to the gate, and the driving mechanism comprises a horizontal screw rod, two movable rods, a first bevel gear, a rotating shaft, a second bevel gear and a rotating driving piece.

2. The anti-freezing device for sand flushing gate in front pool of small hydropower station according to claim 1, characterized in that, The upstream side freeze-proof mechanism further comprises a first soft curtain, the first soft curtain is detachably installed on the upstream side of the pier and located below the top of the overflow weir to the water surface.

3. The anti-freezing device for sand flushing gate in front pool of small hydropower station according to claim 1, characterized in that, The water spraying assembly comprises a flower pipe and a driving pump, the flower pipe is vertically arranged below the water surface on the upstream side of the pier, a plurality of water spraying holes are formed in the flower pipe and used for spraying water to the gate, and the outlet end of the driving pump is connected with the water inlet of the flower pipe and used for pumping water into the flower pipe.

4. The anti-freezing device for sand flushing gate in front pool of small hydropower station according to claim 3, characterized in that, The top of the flower pipe is fixedly provided with a blocking plate, a through hole is formed in the middle of the blocking plate, the plurality of water spraying holes are equidistantly distributed on the flower pipe, and each position has two water spraying holes.

5. The anti-freezing device for sand flushing gate in front pool of small hydropower station according to claim 4, characterized in that, The top of the flower pipe is located at a position 50 cm below the water surface, the outlet end of the driving pump is connected with the bottom of the flower pipe, and the driving pump is located at the height of the top of the gate leaf.

6. The anti-freezing device for sand flushing gate in front pool of small hydropower station according to claim 3, characterized in that, The upstream side anti-freezing mechanism further comprises a horizontal steel pipe and a winch, the horizontal steel pipe is fixedly connected with the middle part of the flower pipe and used for supporting the flower pipe, the winch is fixedly installed on the top plate of the pier, and the steel wire rope of the winch is fixedly connected with both ends of the horizontal steel pipe and used for hoisting the horizontal steel pipe.

7. The anti-freezing device for sand flushing gate in front pool of small hydropower station according to claim 1, characterized in that, The downstream side anti-freezing mechanism further comprises air pipes, the air pipes are fixedly installed on the bottom of the parapet, one end of each of the air pipes corresponds to the air outlet of the hot air machine, and the other end of each of the air pipes corresponds to the gate.

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