CN211395595U

CN211395595U - Liquid bag type large-caliber square pipe culvert gate

Info

Publication number: CN211395595U
Application number: CN201921594603.3U
Authority: CN
Inventors: 王宗志; 叶爱玲; 庄会波; 李瑜; 花金祥; 王坤; 杜慧华; 刘克琳; 汪哲荪
Original assignee: Nanjing Hydraulic Research Institute of National Energy Administration Ministry of Transport Ministry of Water Resources
Current assignee: Nanjing Hydraulic Research Institute of National Energy Administration Ministry of Transport Ministry of Water Resources
Priority date: 2019-09-24
Filing date: 2019-09-24
Publication date: 2020-09-01
Anticipated expiration: 2029-09-24

Abstract

The utility model discloses a square pipe culvert gate of liquid bag formula heavy-calibre can two-way circulation liquid. The method adopts a mode of equal caliber of a pipe culvert and a lock chamber, so that the loss of the gate passing head is small; the gate inclined plane sealing and the large elastic hollow sealing ring are adopted, so that the bidirectional sealing effect is good; the liquid bag expansion piece and the tension spring for opening and closing are positioned in the gate, so that the structure is highly integrated, the structure is compact, and the occupied space is small; different liquids are selected to be injected into the liquid bag telescopic body to open and close the gate according to the types of the flowing liquids in the pipe culvert, so that cross contamination is avoided; the gate is lifted by the tension spring, so that the performance is reliable; a door lock of the liquid bag is arranged to control the state of full opening or full closing of the gate; and a door lock sensor is arranged for automatic control. The hydraulic universal machine has the characteristics of safety, reliability, excellent sealing, automatic control, flexible opening and closing, compact structure, small volume, low energy consumption and the like, and is a hydraulic universal machine.

Description

Liquid bag type large-caliber square pipe culvert gate

Technical Field

The utility model relates to a general mechanical technical field of water conservancy project especially relates to a square pipe culvert gate of liquid bag formula heavy-calibre.

Background

At present, hydraulic buildings, pumping stations, siphon stations, ship locks, water works, sewage treatment plants, petrochemical plants, oil fields and the like all need large-diameter pipe culverts, the pipe culverts all have pressure flow, and the existing gate adopting the square large-diameter pipe culverts has the problems of complex opening and closing structure, large volume, more head loss, unsatisfactory sealing and the like.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the purpose is exactly in order to compensate prior art's defect, to the not enough of the square pipe culvert valve of present heavy-calibre, the utility model provides a liquid bag formula heavy-calibre square pipe culvert gate will be in the same place headstock gear and gate integration, and it not only adapts to the square pipe culvert of heavy-calibre, opens and close in addition in a flexible way, the seal is good, small, bear the pressure flow, the head loss is few, is an advanced general machinery of water conservancy project, provides a liquid bag formula heavy-calibre square pipe culvert gate and application method.

The utility model discloses a realize through following technical scheme:

a liquid bag type large-caliber square pipe culvert gate comprises a gate chamber and a horizontal pipeline, wherein a cover plate is arranged at the top end of the gate chamber, the lower end of the gate chamber is connected in the middle of the horizontal pipeline, the gate chamber and the horizontal pipeline form a three-way shape, the internal channels of the gate chamber and the horizontal pipeline are both rectangular channels, a support plate is fixed at the top of the inner side of the gate chamber, a gate is further arranged inside the gate chamber, the gate is in a trapezoidal bucket shape formed by a rectangular cylinder ring, a front plate, a rear plate, a left plate, a right plate and a bottom plate, the left plate and the right plate are both trapezoidal plates with large upper parts and small lower parts, the front plate and the rear plate are both rectangular plates which are obliquely arranged, the bottom plate is a rectangular plate fixedly connected at the lower ends of the front plate, the rear plate, the left plate and the right plate, the rectangular cylinder ring is fixedly connected with the top ends of the front plate, the rear plate, the left plate and the right plate, the connection surface of the gate chamber and the horizontal pipeline is an inclined surface, the inner wall of the horizontal pipeline is positioned under the lock chamber and is provided with a groove matched with the bottom of the gate, the front side and the rear side of the groove are inclined planes, the inclination rate of the inclined planes is equal to the inclination rate of a front plate and a rear plate of the gate, each inclined plane is provided with an embedded groove, each embedded groove is embedded with a sealing ring, the exposed surface of each sealing ring is higher than the inclined plane where the sealing ring is positioned, two vertical partition plates are also arranged in the gate, the inner walls of the left side and the right side of the gate are provided with vertical sliding grooves, the outer walls of the left plate and the right plate of the gate are respectively provided with sliding edges which can slide up and down in the sliding grooves, the inner wall of the supporting plate is fixedly provided with a square liquid bag box, a liquid bag expansion body is arranged in the liquid bag box and is positioned between the two partition plates in the gate, when the liquid bag expansion body is in an extension state, the bottom end of the liquid bag expansion body is abutted against a bottom plate in the gate, and the left end and, the left end and the right end of the inner wall of the supporting plate are respectively fixed with a hanging ring II, a tension spring is connected between each hanging ring I and each hanging ring II, a hydraulic pipe is arranged at the upper end of the liquid bag telescopic body, the hydraulic pipe penetrates through the liquid bag box and the supporting plate to be communicated with a liquid passing interface I on a cover plate of the brake chamber, and the liquid passing interface I is connected with a high-pressure liquid system of the control cabinet.

The liquid bag telescopic body is formed by vertically superposing a plurality of liquid bags, the liquid bags are circular, each liquid bag is mutually connected with the middle part of the adjacent liquid bag, the connecting part of each liquid bag is circular, each connecting part is provided with a through hole, and the liquid bag positioned at the top is connected with a hydraulic pipe.

The sealing ring is a rectangular ring, four corners of the sealing ring are arc-shaped, the sealing ring is composed of an elastic body and an anchoring plate at the bottom of the elastic body, the top surface of the elastic body is an arc surface, a circular hole channel is arranged in the center of the elastic body, and the circular hole channel is a closed air cavity.

The upper ends of the left plate and the right plate of the gate are respectively provided with a door lock, the plate walls of the left plate and the right plate are respectively provided with a first lock hole, the bottoms of the left plate and the right plate are respectively provided with a drain hole, and the upper end and the lower end of the left inner wall and the lower end of the right inner wall of the gate chamber are respectively provided with a lock catch corresponding to the door lock.

The door lock comprises an L-shaped lock seat, a lock tongue, a resisting plate, a liquid bag and a baffle plate, wherein the upper surface and the lower surface of one end part of the lock tongue are arc surfaces matched with the lock catch, a lock hole II corresponding to the lock hole I on the left plate or the right plate is arranged on the lock seat, the lock seat is fixed on the left plate or the right plate, the spring bolt passes through the lock hole II and the lock hole and is locked in the lock catch, the other end part of the spring bolt is sleeved with a spring, the end part of the spring bolt is fixed at the center of the abutting plate, the baffle plate is fixed at the rear end of the lock seat, the liquid bag is positioned between the abutting plate and the baffle plate, a magnet is fixed on the back side surface of the abutting plate, a magnetic sensor is fixed on the front side surface of the baffle plate, a hydraulic pipe of the liquid bag is communicated with a second liquid passing interface on a cover plate of the lock chamber, the second liquid passing interface is connected with a high-pressure liquid system of the control cabinet, the cable of the magnetic sensor is led out from the cable fixing head on the cover plate, and the cable fixing head is connected with the control cabinet.

The using method comprises the following specific steps:

(1) two pipe orifices of the horizontal pipeline are communicated with the culvert pipe, and the liquid passing interface I and the liquid passing interface II are communicated with a high-pressure liquid system of the control cabinet; connecting the cable of the magnetic sensor with the control cabinet; connecting a cable of the high-pressure liquid system with the control cabinet; inputting calibration data of the relationship between the brake flow and the hydraulic pressure in the liquid bag telescopic body into a control cabinet;

(2) closing the gate: the control cabinet controls the high-pressure liquid system to reduce the hydraulic pressure from the liquid inlet interface II, the liquid bag retracts, the spring pushes the abutting plate to the baffle plate, the lock tongue withdraws from the lock catch at the upper part of the lock chamber, and the door lock is opened; the magnet on the resisting plate is close to the magnetic-sensitive sensor, the magnetic-sensitive sensor outputs a door lock opening signal, the control cabinet controls the high-pressure liquid system to increase hydraulic pressure from the liquid passing interface, the liquid bag telescopic body is heightened, the gate is pushed to move downwards along the inner wall of the gate chamber, the tension spring is lengthened until the front inclined plane and the rear inclined plane of the gate are tightly pressed against the sealing ring and the bottom of the gate enters the groove in the horizontal pipeline, the gate is completely closed, and the liquid in the pipe culvert is stopped from flowing; the control cabinet controls the high-pressure liquid system to increase hydraulic pressure from the liquid inlet port II, the liquid bag expands, the spring compresses, and the abutting plate pushes the spring bolt into the lock catch at the lower part of the lock chamber to lock the gate; the magnet on the abutting plate is far away from the magnetic sensor, and the magnetic sensor outputs a signal that the gate is locked;

(3) opening a partial gate: the control cabinet controls the high-pressure liquid system to reduce the hydraulic pressure from the second ventilating joint, the liquid bag retracts, the spring pushes the abutting plate to the baffle plate, the lock tongue withdraws from the lock catch at the lower part of the lock chamber, and the door lock is opened; the magnet on the resisting plate is close to the magnetic-sensitive sensor, the magnetic-sensitive sensor outputs a door lock opening signal, the control cabinet controls the high-pressure liquid system to reduce the hydraulic pressure from the first liquid passing interface, the tension spring retracts, the liquid bag telescopic body retracts, the tension spring pulls the gate to move upwards along the inner wall of the gate chamber, and until the hydraulic pressure in the liquid bag telescopic body output by the hydraulic sensor of the high-pressure liquid system reaches the calibrated passing gate flow, the control cabinet controls the high-pressure liquid system to stop reducing the hydraulic pressure from the first liquid passing interface, and keeps the hydraulic pressure in the liquid bag telescopic body, so that the gate is partially opened;

(4) and (4) completely opening the gate: the control cabinet controls the high-pressure hydraulic system to continuously reduce hydraulic pressure from the first liquid passing interface, the tension spring retracts, the liquid bag telescopic body retracts, the gate moves upwards along the inner wall of the lock chamber until the top surface of the rectangular cylindrical ring abuts against the inner wall of the supporting frame to completely open the gate, liquid in the pipe culvert flows smoothly, the control cabinet controls the high-pressure hydraulic system to increase hydraulic pressure from the second liquid passing interface, the liquid bag expands, the spring compresses, and the abutting plate pushes the spring bolt into the lock catch at the upper part of the lock chamber to lock the gate; the magnet on the resisting plate is far away from the magnetic-sensitive sensor, and the magnetic-sensitive sensor outputs a signal that the gate is locked, so that the circular use of the square pipe culvert gate is completed.

The utility model has the advantages that: the utility model can circulate liquid in two directions, and adopts the mode of equal caliber of the pipe culvert and the lock chamber, so that the loss of the passing gate water head is small; the gate inclined plane sealing and the large elastic hollow sealing ring are adopted, so that the bidirectional sealing effect is good; the liquid bag expansion piece and the tension spring for opening and closing are positioned in the gate, so that the structure is highly integrated, the structure is compact, and the occupied space is small; different liquids are selected to be injected into the liquid bag telescopic body to open and close the gate according to the types of the flowing liquids in the pipe culvert, so that cross contamination is avoided; the gate is lifted by the tension spring, so that the performance is reliable; and a door lock of the liquid bag is arranged to control the fully open or fully closed state of the gate. The hydraulic universal machinery has the characteristics of safety, reliability, large aperture of the gate, compact structure, small volume, flexible opening and closing, less loss of an overflowing water head, good tightness, low energy consumption and the like, and is an advanced hydraulic universal machinery.

Drawings

Fig. 1 is a left sectional structural schematic diagram of the gate opening state of the present invention.

Fig. 2 is a schematic sectional view of the gate in a closed state according to the present invention.

Fig. 3 is a schematic view of the sectional structure of the gate.

Fig. 4 is a schematic diagram of the cross section structure of the sealing ring of the present invention.

Fig. 5 is a schematic cross-sectional view of the door lock of the present invention.

Detailed Description

As shown in fig. 1, 2 and 3, the fluid bag type large-caliber square pipe culvert gate in the present embodiment includes a gate chamber 5, a sealing ring a19, a sealing ring b20, a support frame 15, a gate, a fluid bag expansion body 18, a tension spring 17, a door lock 23, a cover plate 1 and a base 2, wherein a connection pipe port a3 is provided at the front end of the gate chamber 5 of the pipe culvert gate, a connection pipe port b4 is provided at the rear end of the gate chamber 5, the connection pipe ports a3 and the connection pipe port b4 are horizontally communicated in the gate chamber 5 to form a horizontal pipe, a groove matched with the bottom of the gate is provided on the inner wall of the horizontal pipe right below the gate chamber, a vertically upward duct is provided in the gate chamber 5, and the whole gate chamber 5 is in the shape of a "tee joint". Take over mouth a3, take over mouth b4 and floodgate room 5 hole be the rectangle, the lower part of floodgate room 5 preceding, back inner wall is the inclined plane the embedded sealing washer a19 of caulking groove on the inner wall inclined plane before floodgate room 5 the embedded sealing washer b20 of caulking groove on the inner wall inclined plane after floodgate room 5, sealing washer a19 and sealing washer b20 exposed surface all are higher than the inclined plane of floodgate room 5 preceding, back inner wall. The middle parts of the left inner wall and the right inner wall of the lock chamber 5 are provided with vertical sliding grooves 6, the upper parts and the lower parts of the left inner wall and the right inner wall of the lock chamber 5 are provided with lock catches 7, the top part in the lock chamber 5 is provided with a support frame 15, the top end of the lock chamber 5 is provided with a cover plate 1, and the bottom part of the lock chamber 5 is provided with a base 2. The left plate 8 and the right plate 9 of the gate are both trapezoids with big top and small bottom, the front plate 10 and the rear plate 11 of the gate are both inclined rectangles, the bottom plate 12 of the gate is a rectangle, a rectangular barrel ring 14 is enclosed at the top end of the gate, and the whole gate is like a trapezoidal 'bucket' shape. The slope of the front plate 10 is the same as that of the lower slope of the front inner wall of the lock chamber 5, and the slope of the rear plate 11 is the same as that of the lower slope of the rear inner wall of the lock chamber 5. Two vertical partition plates 13 are arranged in the gate, and hanging rings a are arranged on the left part and the right part of a bottom plate 12 in the gate. The middle parts of the outer side surfaces of the left plate 8 and the right plate 9 are provided with vertical sliding edges which are respectively positioned in sliding grooves 6 of the left inner wall and the right inner wall of the gate chamber 5, and the gate moves along the two sliding grooves 6. The upper parts of the inner sides of the left plate 8 and the right plate 9 are provided with door locks 23, the plate walls of the left plate 8 and the right plate 9 are provided with lock holes at the positions of the door locks 23, and the bottoms of the left plate 8 and the right plate 9 are provided with drain holes. A sac box 16 with a downward opening is arranged in the middle of the bottom surface of the support frame 15, and the sac box 16 is square. The inner bottom surface of the liquid bag box 16 is connected with the liquid bag expansion body 18, and the bottom surface of the liquid bag expansion body 18 is abutted against the bottom plate 12 in the gate. Hanging rings b are arranged on the left part and the right part of the bottom surface of the supporting frame 15, the tension springs 17 are hung on the two hanging rings b, and the lower end of each tension spring 17 is hung on the hanging ring a. The liquid sac telescopic body 18 is formed by vertically overlapping a plurality of liquid sacs, and the liquid sacs are all round. The middle parts of the liquid bags and the adjacent liquid bags are mutually connected, the connecting parts of the liquid bags are all circular, and through holes are formed in the centers of the connecting parts of the liquid bags. The hydraulic pipe of the liquid bag telescopic body 18 is communicated with a liquid passing interface a on the cover plate 1, and the liquid passing interface a is communicated with a high-pressure liquid system of the control cabinet. When the hydraulic pressure is increased from the liquid-through port a, the liquid bag expands, and the liquid bag telescopic body 18 is heightened; when the hydraulic pressure is reduced from the liquid supply port a, the liquid bag contracts, and the liquid bag expansion body 18 contracts.

As shown in fig. 4, the sealing ring a19 is a rectangular ring, four corners of the sealing ring a19 are circular arcs, the top surface of the elastic body 21 of the sealing ring a19 is a circular arc surface, and the bottom of the sealing ring a19 is provided with the anchor plate 22. In the center of the elastic body 21, there is a circular hole which is a closed air cavity, and the cross section of the whole sealing ring a19 is like an omega shape. The structure of the sealing ring a19 is the same as that of the sealing ring b 20.

As shown in fig. 5, a lock tongue 26 penetrates through a lock channel of a lock seat 24 of the door lock 23, the cross section of the lock tongue 26 is rectangular, the upper and lower parts of the end part of the lock tongue 26 are provided with arc surfaces, the other end of the lock tongue 26 is fixed at the center of a resisting plate 27, and a spring 28 is sleeved on the lock tongue 26 section between the lock channel of the lock seat 24 and the resisting plate 27. A baffle 25 is provided at the rear end of the lock seat 24, and a liquid bag 29 is provided between the baffle 25 and the abutting plate 27. The magnet 30 is arranged on the supporting plate 27, and the magnetic sensor 31 is arranged on the baffle plate 25. The hydraulic pipe of the liquid bag 29 is communicated with a liquid passing interface b on the cover plate 1, and the liquid passing interface b is communicated with a high-pressure liquid system of the control cabinet. The magnetic sensor 31 cable is led out from the cable fixing head on the cover plate 1. When the hydraulic pressure is increased from the liquid passing port b, the liquid bag 29 expands, the spring 28 compresses, the abutting plate 27 approaches the lock channel of the lock seat 24, the bolt 26 passes through the lock hole on the left plate 8 or the right plate 9 to enter the lock catch 7 of the lock chamber 5, and the gate lock 23 is locked; the magnet 30 on the abutting plate 27 is separated from the magnetic sensor 31, and the magnetic sensor 31 outputs a signal that the shutter is locked. When the hydraulic pressure is reduced from the liquid inlet b, the liquid bag 29 contracts, the spring 28 pushes the abutting plate 27 to the baffle plate 25, the lock tongue 26 withdraws from the lock catch 7, and the gate is released; the magnet 30 on the abutting plate 27 approaches the magnetic sensor 31, and the magnetic sensor 31 outputs a signal indicating that the shutter is opened.

The using method comprises the following specific steps:

(1) the pipe culvert gate is arranged on a base, a connecting pipe port a3 and a connecting pipe port b4 are communicated with a culvert pipe, and a liquid communication port a of the liquid bag telescopic body 18 and a liquid communication port b of the liquid bag 29 are communicated with a high-pressure liquid system; the cable of the magnetic sensor 31 is connected with the control cabinet; connecting a cable of the high-pressure liquid system with the control cabinet; inputting calibration data of the relationship between the brake flow and the hydraulic pressure in the liquid bag telescopic body 18 into the control cabinet; and inputting automatic control software into the control cabinet.

(2) Closing the gate: the control cabinet controls the high-pressure liquid system to reduce the hydraulic pressure from the liquid passing port b, the liquid bag 29 retracts, the spring 28 pushes the abutting plate 27 to the baffle plate 25, the bolt 26 is withdrawn from the lock catch 7 at the upper part of the lock chamber 5, and the door lock 23 is opened; the magnet 30 on the abutting plate 27 approaches the magnetic sensor 31, and the magnetic sensor 31 outputs a signal for unlocking the door lock 23. The control cabinet controls the high-pressure liquid system to increase hydraulic pressure from the liquid passing port a, the liquid bag telescopic body 18 is heightened, the gate moves downwards along the inner wall of the gate chamber 5, the tension spring 17 is lengthened until the front inclined plane and the rear inclined plane of the gate tightly abut against the sealing ring a19 and the sealing ring b20, the bottom of the gate enters the groove, the gate is completely closed, and liquid in the pipe culvert stops flowing. The control cabinet controls the high-pressure liquid system to increase the hydraulic pressure from the liquid passing port b, the liquid bag 29 expands, the spring 28 compresses, the abutting plate 27 pushes the bolt 26 out of the lock channel, and the bolt 26 enters the lock catch 7 at the lower part of the lock chamber 5 to lock the lock door 23; the magnet 30 on the abutting plate 27 is far away from the magnetic sensor 31, and the magnetic sensor 31 outputs a signal that the gate is locked.

(3) Opening a partial gate: the control cabinet controls the high-pressure liquid system to reduce the hydraulic pressure from the air-vent joint b, the liquid bag 29 retracts, the spring 28 pushes the abutting plate 27 to the baffle plate 25, the bolt 26 is withdrawn from the lock catch 7 at the lower part of the lock chamber 5, and the door lock 23 is opened; the door lock 23 is opened; the magnet 30 on the abutting plate 27 approaches the magnetic sensor 31, and the magnetic sensor 31 outputs a signal for unlocking the door lock 23. The control cabinet controls the high-pressure liquid system to reduce the hydraulic pressure from the liquid passing interface a, the tension spring 17 retracts, the liquid bag telescopic body 18 retracts, the gate moves upwards along the inner wall of the gate chamber 5, and until the hydraulic pressure in the liquid bag telescopic body 18 output by the hydraulic sensor of the high-pressure liquid system reaches the calibrated passing gate flow, the control cabinet controls the high-pressure liquid system to stop reducing the hydraulic pressure from the liquid passing interface a, the hydraulic pressure in the liquid bag telescopic body 18 is maintained, and the gate is partially opened.

(4) And (4) completely opening the gate: the control cabinet controls the high hydraulic system to continuously reduce hydraulic pressure from the liquid passing port a, the tension spring 17 retracts, the liquid bag telescopic body 18 retracts, the gate moves upwards along the inner wall of the lock chamber 5 until the top surface of the rectangular cylindrical ring 14 abuts against the bottom surface of the supporting frame 15 to completely open the gate, and liquid in the pipe culvert flows smoothly. The control cabinet controls the high-pressure liquid system to increase the hydraulic pressure from the liquid passing port b, the liquid bag 29 expands, the spring 28 compresses, the abutting plate 27 pushes the bolt 26 out of the lock channel, and the bolt 26 enters the lock catch 7 at the upper part of the lock chamber 5 to lock the lock door 23; the magnet 30 on the abutting plate 27 is far away from the magnetic sensor 31, and the magnetic sensor 31 outputs a signal that the gate is locked, namely, the recycling of the square pipe culvert gate is completed.

Claims

1. The utility model provides a square pipe culvert gate of liquid bag formula heavy-calibre which characterized in that: the gate comprises a gate chamber and a horizontal pipeline, wherein a cover plate is arranged at the top end of the gate chamber, the lower end of the gate chamber is connected in the middle of the horizontal pipeline, the gate chamber and the horizontal pipeline form a three-way shape, the inner channels of the gate chamber and the horizontal pipeline are rectangular channels, a supporting plate is fixed at the top of the inner side of the gate chamber, a gate is further arranged in the gate chamber, the gate is in a trapezoidal bucket shape formed by a rectangular cylinder ring, a front plate, a rear plate, a left plate, a right plate and a bottom plate, the left plate and the right plate are trapezoidal plates with the upper part larger than the lower part, the front plate and the rear plate are rectangular plates which are obliquely arranged, the bottom plate is a rectangular plate fixedly connected at the lower ends of the front plate, the rear plate, the left plate and the right plate, the rectangular cylinder ring is fixedly connected with the top ends of the front plate, the rear plate, the left plate and the right gate plate, the connection surface of the gate chamber and the horizontal pipeline is an inclined, the inner wall of the horizontal pipeline is positioned under the lock chamber and is provided with a groove matched with the bottom of the gate, the front side and the rear side of the groove are inclined planes, the inclination rate of the inclined planes is equal to the inclination rate of a front plate and a rear plate of the gate, each inclined plane is provided with an embedded groove, each embedded groove is embedded with a sealing ring, the exposed surface of each sealing ring is higher than the inclined plane where the sealing ring is positioned, two vertical partition plates are also arranged in the gate, the inner walls of the left side and the right side of the gate are provided with vertical sliding grooves, the outer walls of the left plate and the right plate of the gate are respectively provided with sliding edges which can slide up and down in the sliding grooves, the inner wall of the supporting plate is fixedly provided with a square liquid bag box, a liquid bag expansion body is arranged in the liquid bag box and is positioned between the two partition plates in the gate, when the liquid bag expansion body is in an extension state, the bottom end of the liquid bag expansion body is abutted against a bottom plate in the gate, and the left end and, the left end and the right end of the inner wall of the supporting plate are respectively fixed with a hanging ring II, a tension spring is connected between each hanging ring I and each hanging ring II, a hydraulic pipe is arranged at the upper end of the liquid bag telescopic body, the hydraulic pipe penetrates through the liquid bag box and the supporting plate to be communicated with a liquid passing interface I on a cover plate of the brake chamber, and the liquid passing interface I is connected with a high-pressure liquid system of the control cabinet.

2. The liquid bag type large-caliber square pipe culvert gate of claim 1, wherein: the liquid bag telescopic body is formed by vertically superposing a plurality of liquid bags, the liquid bags are circular, each liquid bag is mutually connected with the middle part of the adjacent liquid bag, the connecting part of each liquid bag is circular, each connecting part is provided with a through hole, and the liquid bag positioned at the top is connected with a hydraulic pipe.

3. The liquid bag type large-caliber square pipe culvert gate of claim 1, wherein: the sealing ring is a rectangular ring, four corners of the sealing ring are arc-shaped, the sealing ring is composed of an elastic body and an anchoring plate at the bottom of the elastic body, the top surface of the elastic body is an arc surface, a circular hole channel is arranged in the center of the elastic body, and the circular hole channel is a closed air cavity.

4. The liquid bag type large-caliber square pipe culvert gate of claim 1, wherein: the upper ends of the left plate and the right plate of the gate are respectively provided with a door lock, the plate walls of the left plate and the right plate are respectively provided with a first lock hole, the bottoms of the left plate and the right plate are respectively provided with a drain hole, and the upper end and the lower end of the left inner wall and the lower end of the right inner wall of the gate chamber are respectively provided with a lock catch corresponding to the door lock.

5. The liquid bag type large-caliber square pipe culvert gate of claim 4, wherein: the door lock comprises an L-shaped lock seat, a lock tongue, a resisting plate, a liquid bag and a baffle plate, wherein the upper surface and the lower surface of one end part of the lock tongue are arc surfaces matched with the lock catch, a lock hole II corresponding to the lock hole I on the left plate or the right plate is arranged on the lock seat, the lock seat is fixed on the left plate or the right plate, the spring bolt passes through the lock hole II and the lock hole and is locked in the lock catch, the other end part of the spring bolt is sleeved with a spring, the end part of the spring bolt is fixed at the center of the abutting plate, the baffle plate is fixed at the rear end of the lock seat, the liquid bag is positioned between the abutting plate and the baffle plate, a magnet is fixed on the back side surface of the abutting plate, a magnetic sensor is fixed on the front side surface of the baffle plate, a hydraulic pipe of the liquid bag is communicated with a second liquid passing interface on a cover plate of the lock chamber, the second liquid passing interface is connected with a high-pressure liquid system of the control cabinet, the cable of the magnetic sensor is led out from the cable fixing head on the cover plate, and the cable fixing head is connected with the control cabinet.