Opening and closing protection device of screw type water conservancy gate and using method

Abstract

The invention provides an opening and closing protection device of a screw type water conservancy gate and a using method. The opening and closing protection device comprises a gate frame, a gate is installed in the gate frame, a pair of connecting bases are fixedly connected to the top of the gate, threaded rods are rotationally connected to the tops of the connecting bases, and a transmission box is fixedly installed at the top of the gate frame; the threaded rods penetrate through the transmission box, a pair of threaded sleeves are rotationally connected into the transmission box, the threaded rods penetrate through the corresponding threaded sleeves and are in threaded connection with the threaded sleeves, and a driving mechanism capable of driving the pair of threaded sleeves to rotate synchronously is installed in the transmission box. A pair of first corrugated sleeves is installed between the connecting base and the inner top of the gate frame. According to the device, a double-screw lifting mode is adopted, the gate is evenly stressed, the device is suitable for opening and closing of a large gate, opening and closing can be achieved in a motor driving mode or a manual driving mode, the threaded rod is arranged in the corrugated sleeve in a sealed mode, and corrosion is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic gates, and in particular to an opening and closing protection device for a screw-type hydraulic gate and a use method thereof. Background Art

[0002] Gates are control facilities used to close and open water discharge channels. They are an important part of water conservancy projects and can be used to intercept water flow, control water levels, regulate flow, discharge sediment and floating objects, etc. The opening and closing of gates usually requires a hoist. Currently, the hoist is mainly installed by installing a screw hoist, which drives the screw up and down to open and close the gate.

[0003] Most of the existing opening and closing devices are single-screw types that are electrically or manually driven, and are suitable for smaller gates. For large gates, the stability of single-screw lifting is poor, the force is uneven, and the screw is exposed to the outside, which is easily eroded by rainwater and causes rust, which in turn causes the gate to fail to open and close normally. Summary of the invention

[0004] In view of the above problems, the present invention provides a screw-type hydraulic gate opening and closing protection device and a method of use. The device adopts a double-screw lifting form, the gate is evenly stressed, and is suitable for the opening and closing of large gates. It can be opened and closed by motor drive or manual drive, and the threaded rod seal is arranged in a corrugated casing to prevent rust.

[0005] To solve the above problems, the technical solution adopted by the present invention is:

[0006] A screw-type hydraulic gate opening and closing protection device comprises a gate frame, a gate is installed in the gate frame, a pair of connecting seats are fixedly connected to the top of the gate, a threaded rod is rotatably connected to the top of the pair of connecting seats, a transmission box is fixedly installed on the top of the gate frame, the threaded rod passes through the transmission box, a pair of threaded sleeves are rotatably connected in the transmission box, the threaded rod passes through the corresponding threaded sleeves and is threadedly connected thereto, a driving mechanism that can drive a pair of threaded sleeves to rotate synchronously is installed in the transmission box, the connecting seat and the gate are fixedly connected to the top of the gate frame, the threaded rod passes through the transmission box, a pair of threaded sleeves are rotatably connected in the transmission box, the threaded rod passes through the corresponding threaded sleeves and is threadedly connected thereto, a driving mechanism that can drive a pair of threaded sleeves to rotate synchronously is installed in the transmission box, and the connecting seat and the gate are fixedly connected to the top of the gate frame. A pair of first corrugated sleeves are installed between the inner tops of the door frames, and the pair of first corrugated sleeves are respectively sleeved on the corresponding threaded rods, and the top through section of the threaded rods is sleeved with a second corrugated sleeve, and a spiral oil pump pipe and a spiral oil return pipe are respectively wound on the pair of first corrugated sleeves, and the first corrugated sleeves compress and synchronously extrude the spiral oil pump pipe and the spiral oil return pipe, and the first corrugated sleeves stretch and synchronously rebound the spiral oil pump pipe and the spiral oil return pipe, and the extrusion and rebound of the spiral oil pump pipe are used to drip lubricating oil to the threaded rods and the driving mechanism.

[0007] Preferably, each circle of the spiral oil pump pipe and the spiral oil return pipe is embedded in a plurality of grooves on the side wall of the corresponding first corrugated sleeve at intervals, and the pipe is squeezed as the groove is folded and rebounds as the groove is stretched.

[0008] Preferably, the upper end of the threaded rod is rotatably connected to a top plate, the upper end of the second corrugated sleeve is fixed to the bottom of the top plate, both ends of the top plate are fixedly connected to a limiting rod, and the lower end of the limiting rod passes through the transmission box and extends downward.

[0009] Preferably, the driving mechanism includes a driving shaft rotatably connected to the center of a transmission box, a first bevel gear is fixedly connected to the driving shaft, both ends of the transmission box are laterally rotatably connected to transmission shafts, the opposite ends of the two transmission shafts are fixedly connected to second bevel gears, the second bevel gear is meshed with the first bevel gear, and the transmission shaft is connected to a corresponding threaded sleeve through a transmission assembly.

[0010] Preferably, the transmission assembly comprises a worm fixedly connected to the opposite end of the transmission shaft, and a worm wheel is fixedly sleeved on the threaded sleeve, and the worm wheel is meshed with the corresponding worm.

[0011] Preferably, a handwheel is rotatably connected to the top of the transmission box, and the handwheel is fixedly connected to the upper end of the drive shaft. A motor is installed on the inner top of the gate frame, and the output end of the motor is connected to the lower end of the drive shaft through a clutch.

[0012] Preferably, a sealing ring is embedded in the inner bottom of the transmission box, and the sealing ring abuts against the bottom of the threaded sleeve.

[0013] Preferably, an oil storage chamber is provided in the top of the gate, an oil filling hole is provided in the top of the oil storage chamber, an observation window is provided on the front side of the oil storage chamber, the spiral oil pump pipe includes a pump inlet end and a pump outlet end, the spiral oil return pipe includes an oil inlet end and an oil outlet end, the pump inlet end and the oil outlet end both extend into the oil storage chamber, and one-way valves are installed in the pump inlet end, the pump outlet end, the oil inlet end and the oil outlet end.

[0014] Preferably, an oil distribution pipe is installed on the inner top of the transmission box, the oil distribution pipe is connected to the pump outlet, and oil drip holes are provided at the bottom of the oil distribution pipe corresponding to the threaded sleeve, the transmission assembly and the first bevel gear, and the oil inlet end is connected to the bottom of the transmission box.

[0015] The present invention also discloses a method for using the opening and closing protection device of a screw-type hydraulic gate, comprising the following steps:

[0016] S1. To open the gate normally, you only need to start the motor and the clutch, make the clutch in the docking state, drive the drive shaft to rotate, and then drive a pair of second bevel gears to rotate through the first bevel gear, and then drive the worm wheel to rotate through the transmission shaft and the worm, and then synchronously drive a pair of threaded sleeves to rotate, and a pair of threaded rods to rotate synchronously, and finally drive the gate to rise and open;

[0017] S2. When the motor cannot be used for starting, the clutch is in a disengaged state. The gate can be opened by simply turning the hand wheel to drive the drive shaft. The threaded rod seal is set in the first corrugated sleeve and the second corrugated sleeve to prevent the threaded rod from rusting;

[0018] S3. During the gate lifting and lowering process, the first corrugated sleeve is compressed or stretched with it. When stretched, the spiral pump oil pipe and the spiral pump oil pipe rebound with the stretching of the groove. The spiral pump oil pipe pumps the lubricating oil in the oil storage cavity through the pumping end, and the spiral pump oil pipe sucks the lubricating oil collected at the bottom of the transmission box through the oil inlet end;

[0019] S4. During compression, the spiral pump oil pipe and the spiral pump oil pipe are squeezed as the groove is compressed. The spiral pump oil pipe squeezes the lubricating oil into the oil distribution pipe through the pump outlet, and finally drips the transmission component, the threaded sleeve and the first bevel gear through multiple oil drip holes to avoid rust and improve the driving performance. The spiral oil return pipe draws the excess lubricating oil back to the oil storage chamber through the oil outlet to achieve circulation.

[0020] The beneficial effects of the present invention are:

[0021] 1. By installing a pair of threaded rods, threaded sleeves, transmission boxes and driving mechanisms, the driving shaft rotates, which drives a pair of second bevel gears to rotate through the first bevel gear, and then drives the worm wheel to rotate through the transmission shaft and the worm, and then synchronously drives a pair of threaded sleeves to rotate, and a pair of threaded rods rotate synchronously, and finally drives the gate to rise and open. The gate adopts the form of double-screw lifting, and the gate is evenly stressed, which is suitable for the opening and closing of large gates.

[0022] 2. By installing the handwheel, motor and clutch, the gate is normally opened electrically. You only need to start the motor and clutch and make the clutch in the docking state to drive the drive shaft to rotate. When the motor cannot be used to start, the clutch is in a disengaged state. You only need to turn the handwheel to drive the drive shaft to rotate to open the gate. The gate can be opened and closed by motor drive or manual drive.

[0023] 3. By installing the first corrugated sleeve, the top plate, the limit rod and the second corrugated sleeve, the threaded rod seal is set in the first corrugated sleeve and the second corrugated sleeve, which can be extended and retracted with the rise and fall of the threaded rod, avoiding the threaded rod from contacting with the outside air and rainwater, and thus preventing rust, thereby ensuring the normal opening and closing of the gate.

[0024] 4. By installing the spiral oil pump pipe, the spiral oil return pipe, the oil distribution pipe and multiple oil dripping holes, during the gate lifting and lowering process, the first corrugated sleeve is compressed or stretched with it. When stretched, the spiral oil pump pipe and the spiral oil pump pipe rebound as the groove stretches, and the spiral oil pump pipe pumps the lubricating oil in the oil storage chamber through the pump inlet end, and the spiral oil pump pipe sucks the lubricating oil collected at the bottom of the transmission case through the oil inlet end; when compressed, the spiral oil pump pipe and the spiral oil pump pipe are squeezed as the groove is compressed, and the spiral oil pump pipe squeezes the lubricating oil into the oil distribution pipe through the pump outlet end, and finally drips the transmission assembly, the threaded sleeve and the first bevel gear through the multiple oil dripping holes to avoid rust, facilitate driving, and improve driving performance. The spiral oil return pipe draws excess lubricating oil back to the oil storage chamber through the oil outlet end to achieve circulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the present invention;

[0026] Figure 2 is a cross-sectional view of the present invention;

[0027] Figure 3 A schematic cross-sectional view of a transmission case provided by the present invention;

[0028] Figure 4 This is a bottom view schematic diagram of the transmission assembly proposed by the present invention.

[0029] In the figure: 1 gate frame, 2 gate, 3 observation window, 4 limit rod, 5 first corrugated sleeve, 6 spiral oil return pipe, 61 oil outlet, 62 oil inlet, 7 motor, 8 connecting seat, 9 transmission box, 10 hand wheel, 11 top plate, 12 second corrugated sleeve, 13 spiral pump oil pipe, 131 pump inlet, 132 pump outlet, 14 oil storage chamber, 15 oil filling hole, 16 clutch, 17 threaded rod, 18 drive shaft, 19 first bevel gear, 20 second bevel gear, 21 transmission shaft, 22 worm, 23 threaded sleeve, 24 sealing ring, 25 oil distribution pipe, 26 oil drip hole. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific implementation disclosed below.

[0031] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0032] Reference Figure 1-4 A screw-type hydraulic gate opening and closing protection device, a screw-type hydraulic gate opening and closing protection device, comprises a gate frame 1, a gate 2 is installed in the gate frame 1, a pair of connecting seats 8 are fixedly connected to the top of the gate 2, the tops of the pair of connecting seats 8 are rotatably connected with threaded rods 17, a transmission box 9 is fixedly installed on the top of the gate frame 1, the threaded rod 17 penetrates the transmission box 9, a pair of threaded sleeves 23 are rotatably connected in the transmission box 9, the threaded rod 17 penetrates the corresponding threaded sleeves 23 and is threadedly connected thereto, a driving mechanism that can drive a pair of threaded sleeves 23 to rotate synchronously is installed in the transmission box 9, a pair of threaded rods 17 rotate synchronously, and finally drive the gate 2 to rise and open, adopts the form of double-screw lifting, the gate is evenly stressed, and is suitable for the opening and closing of large gates.

[0033] Specifically, the driving mechanism includes a driving shaft 18 rotatably connected to the center of the transmission box 9, a first bevel gear 19 is fixedly connected to the driving shaft 18, and a transmission shaft 21 is rotatably connected to both ends of the transmission box 9, and the opposite ends of the two transmission shafts 21 are fixedly connected to the second bevel gear 20, the second bevel gear 20 is meshed with the first bevel gear 19, and the transmission shaft 21 is connected to the corresponding threaded sleeve 23 through a transmission assembly, and the transmission assembly includes a worm 22 fixedly connected to the opposite end of the transmission shaft 21, and a worm wheel is fixedly sleeved on the threaded sleeve 23, and the worm wheel is meshed with the corresponding worm 22. The driving shaft 18 rotates, and a pair of second bevel gears 20 are driven to rotate through the first bevel gear 19, and then the worm wheel is driven to rotate through the transmission shaft 21 and the worm 22, thereby synchronously driving a pair of threaded sleeves 23 to rotate, and a pair of threaded rods 17 rotate synchronously.

[0034] Furthermore, a handwheel 10 is rotatably connected to the top of the transmission box 9, and the handwheel 10 is fixedly connected to the upper end of the drive shaft 18. A motor 7 is installed on the inner top of the gate frame 1, and the output end of the motor 7 is connected to the lower end of the drive shaft 18 through a clutch 16. The gate 2 is normally opened in an electric manner. It is only necessary to start the motor 7 and the clutch 16 so that the clutch 16 is in a connected state to drive the drive shaft 18 to rotate. When the motor 7 cannot be used to start, the clutch 16 is in a disengaged state. The gate 2 can be opened by rotating the handwheel 10 to drive the drive shaft 18 to rotate. The gate can be opened and closed by either motor drive or manual drive.

[0035] Furthermore, a sealing ring 24 is embedded in the inner bottom of the transmission box 9, and the sealing ring 24 contacts the bottom of the threaded sleeve 23. The threaded sleeve 23 is sealed when rotating to prevent leakage of lubricating oil.

[0036] A pair of first corrugated sleeves 5 are installed between the connecting seat 8 and the inner top of the gate frame 1. The pair of first corrugated sleeves 5 are respectively sleeved on the corresponding threaded rod 17. The top penetration section of the threaded rod 17 is sleeved with a second corrugated sleeve 12. The upper end of the threaded rod 17 is rotatably connected to the top plate 11. The upper end of the second corrugated sleeve 12 is fixed to the bottom of the top plate 11. Both ends of the top plate 11 are fixedly connected to the limit rod 4. The lower end of the limit rod 4 penetrates the transmission box 9 and extends downward. The threaded rod 17 is raised and lowered, and the top plate 11 is synchronously raised and lowered under the limiting action of the limit rod 4. The threaded rod 17 is sealed in the first corrugated sleeve 5 and the second corrugated sleeve 12, and can be extended and retracted as the threaded rod 17 is raised and lowered, so as to prevent the threaded rod 17 from contacting with the outside air and rainwater, and thus will not rust, thereby ensuring the normal opening and closing of the gate 2.

[0037] A spiral oil pump pipe 13 and a spiral oil return pipe 6 are respectively wound around a pair of first corrugated sleeves 5. The first corrugated sleeve 5 compresses and synchronously extrude the spiral oil pump pipe 13 and the spiral oil return pipe 6. The first corrugated sleeve 5 stretches and synchronously rebounds the spiral oil pump pipe 13 and the spiral oil return pipe 6. The extrusion and rebound of the spiral oil pump pipe 13 are used to drip lubricating oil to the threaded rod 17 and the driving mechanism. Each circle of the spiral oil pump pipe 13 and the spiral oil return pipe 6 are embedded in a plurality of grooves on the side wall of the corresponding first corrugated sleeve 5 at intervals. The pipelines are squeezed as the grooves are folded and rebound as the grooves are stretched.

[0038] Furthermore, an oil storage chamber 14 is provided in the top of the gate 2, an oil filling hole 15 is provided in the top of the oil storage chamber 14, an observation window 3 is provided on the front side of the oil storage chamber 14, the spiral pump oil pipe 13 includes a pump inlet end 131 and a pump outlet end 132, the spiral oil return pipe 6 includes an oil inlet end 62 and an oil outlet end 61, the pump inlet end 131 and the oil outlet end 61 both extend into the oil storage chamber 14, and a one-way valve is installed in the pump inlet end 131, the pump outlet end 132, the oil inlet end 62 and the oil outlet end 61, an oil distribution pipe 25 is installed on the inner top of the transmission box 9, the oil distribution pipe 25 is connected to the pump outlet end 132, and the bottom of the oil distribution pipe 25 is provided with oil drip holes 26 corresponding to the threaded sleeve 23, the transmission assembly and the first bevel gear 19, the oil inlet end 62 is connected to the bottom of the transmission box 9, and the transmission assembly, the threaded sleeve 23 and the first bevel gear 19 are moistened by multiple oil drip holes 26 to avoid rust and improve driving performance.

[0039] Working principle: To open the gate 2 normally, you only need to start the motor 7 and the clutch 16, make the clutch 16 in a docking state, drive the drive shaft 18 to rotate, and then drive a pair of second bevel gears 20 to rotate through the first bevel gear 19, and then drive the worm wheel to rotate through the transmission shaft 21 and the worm 22, and then synchronously drive a pair of threaded sleeves 23 to rotate, and a pair of threaded rods 17 to rotate synchronously, and finally drive the gate 2 to rise and open; when the motor 7 cannot be used to start, the clutch 16 is in a disengaged state, and you only need to turn the handwheel 10 to drive the drive shaft 18 to rotate, and then the gate 2 can be opened.

[0040] The threaded rod 17 is sealed in the first corrugated sleeve 5 and the second corrugated sleeve 12, and expands and contracts with the rise and fall of the threaded rod 17, so as to prevent the threaded rod 17 from contacting with the outside air and rainwater, and thus prevent rust, thereby ensuring the normal opening and closing of the gate 2.

[0041] During the lifting and lowering process of the gate 2, the first corrugated sleeve 5 is compressed or stretched with it. When stretched, the spiral pump oil pipe 13 and the spiral pump oil pipe 6 rebound as the groove stretches, and the spiral pump oil pipe 13 pumps the lubricating oil in the oil storage chamber 14 through the pump inlet end 131, and the spiral pump oil pipe 6 sucks the lubricating oil collected at the bottom of the transmission box 9 through the oil inlet end 62; when compressed, the spiral pump oil pipe 13 and the spiral pump oil pipe 6 are squeezed as the groove is compressed, and the spiral pump oil pipe 13 squeezes the lubricating oil into the oil distribution pipe 25 through the pump outlet end 132, and finally drips the transmission assembly, the threaded sleeve 23 and the first bevel gear 19 through a plurality of oil drip holes 26 to avoid rust and improve driving performance. The spiral oil return pipe 6 draws excess lubricating oil back to the oil storage chamber 14 through the oil outlet end 61 to achieve circulation.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A screw-type hydraulic gate opening and closing protection device, comprising a gate frame (1), wherein a gate (2) is installed in the gate frame (1), characterized in that: A pair of connecting seats (8) are fixedly connected to the top of the gate (2), and the tops of the pair of connecting seats (8) are both rotatably connected to threaded rods (17). A transmission box (9) is fixedly installed on the top of the gate frame (1), and the threaded rods (17) penetrate the transmission box (9). A pair of threaded sleeves (23) are rotatably connected in the transmission box (9). The threaded rods (17) penetrate the corresponding threaded sleeves (23) and are threadedly connected thereto. A driving mechanism capable of driving the pair of threaded sleeves (23) to rotate synchronously is installed in the transmission box (9). A pair of first corrugated sleeves are installed between the connecting seats (8) and the inner top of the gate frame (1). (5), a pair of the first corrugated sleeves (5) are respectively sleeved on the corresponding threaded rod (17), the top through section of the threaded rod (17) is sleeved with a second corrugated sleeve (12), a spiral oil pump pipe (13) and a spiral oil return pipe (6) are respectively wound on the pair of the first corrugated sleeves (5), the first corrugated sleeves (5) compress and synchronously extrude the spiral oil pump pipe (13) and the spiral oil return pipe (6), the first corrugated sleeves (5) stretch and synchronously rebound the spiral oil pump pipe (13) and the spiral oil return pipe (6), the squeezing and rebounding of the spiral oil pump pipe (13) are used to drip lubricating oil to the threaded rod (17) and the driving mechanism.

2. The opening and closing protection device of a screw-type hydraulic gate according to claim 1 is characterized in that: Each circle of the spiral oil pump pipe (13) and the spiral oil return pipe (6) is embedded in a plurality of grooves on the side wall of the corresponding first corrugated sleeve (5) at intervals, and the pipes are squeezed as the grooves are folded and rebounded as the grooves are stretched.

3. The opening and closing protection device of a screw-type hydraulic gate according to claim 1 is characterized in that: The upper end of the threaded rod (17) is rotatably connected to the top plate (11), the upper end of the second corrugated sleeve (12) is fixed to the bottom of the top plate (11), both ends of the top plate (11) are fixedly connected to the limit rod (4), and the lower end of the limit rod (4) penetrates the transmission box (9) and extends downward.

4. The opening and closing protection device of a screw-type hydraulic gate according to claim 1 is characterized in that: The driving mechanism comprises a driving shaft (18) rotatably connected to the center of a transmission box (9), a first bevel gear (19) being fixedly connected to the driving shaft (18), transmission shafts (21) being laterally rotatably connected to both ends of the transmission box (9), second bevel gears (20) being fixedly connected to opposite ends of the two transmission shafts (21), the second bevel gears (20) being meshed with the first bevel gear (19), and the transmission shafts (21) being connected to corresponding threaded sleeves (23) via a transmission assembly.

5. The opening and closing protection device of a screw-type hydraulic gate according to claim 4 is characterized in that: The transmission assembly comprises a worm (22) fixedly connected to the opposite end of the transmission shaft (21), and a worm wheel is fixedly sleeved on the threaded sleeve (23), and the worm wheel is meshed with the corresponding worm (22).

6. The opening and closing protection device of a screw-type hydraulic gate according to claim 4 is characterized in that: The top of the transmission box (9) is rotatably connected to a hand wheel (10), and the hand wheel (10) is fixedly connected to the upper end of the drive shaft (18). A motor (7) is installed at the inner top of the gate frame (1), and the output end of the motor (7) is connected to the lower end of the drive shaft (18) via a clutch (16).

7. The opening and closing protection device of a screw-type hydraulic gate according to claim 1 is characterized in that: A sealing ring (24) is embedded in the inner bottom of the transmission box (9), and the sealing ring (24) abuts against the bottom of the threaded sleeve (23).

8. The opening and closing protection device of a screw-type hydraulic gate according to claim 1, characterized in that: An oil storage chamber (14) is provided at the top of the gate (2), an oil filling hole (15) is provided at the top of the oil storage chamber (14), an observation window (3) is provided at the front side of the oil storage chamber (14), the spiral oil pump pipe (13) comprises a pump inlet end (131) and a pump outlet end (132), the spiral oil return pipe (6) comprises an oil inlet end (62) and an oil outlet end (61), the pump inlet end (131) and the oil outlet end (61) both extend into the oil storage chamber (14), and one-way valves are installed in the pump inlet end (131), the pump outlet end (132), the oil inlet end (62) and the oil outlet end (61).

9. The opening and closing protection device of a screw-type hydraulic gate according to claim 8, characterized in that: An oil distribution pipe (25) is installed at the inner top of the transmission box (9), and the oil distribution pipe (25) is connected to the pump outlet end (132). The bottom of the oil distribution pipe (25) is provided with oil drip holes (26) corresponding to the threaded sleeve (23), the transmission assembly and the first bevel gear (19), and the oil inlet end (62) is connected to the bottom of the transmission box (9).

10. A method for using the opening and closing protection device of a screw-type hydraulic gate according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. To open the gate (2) normally, it is only necessary to start the motor (7) and the clutch (16), so that the clutch (16) is in a docking state, drive the drive shaft (18) to rotate, and then drive the pair of second bevel gears (20) to rotate through the first bevel gear (19), and then drive the worm wheel to rotate through the transmission shaft (21) and the worm (22), and then synchronously drive the pair of threaded sleeves (23) to rotate, and the pair of threaded rods (17) to rotate synchronously, and finally drive the gate (2) to rise and open; S2. When the motor (7) cannot be used for starting, the clutch (16) is in a disengaged state, and the gate (2) can be opened by simply rotating the hand wheel (10) to drive the drive shaft (18) to rotate. The threaded rod (17) is sealed in the first corrugated sleeve (5) and the second corrugated sleeve (12) to prevent the threaded rod (17) from rusting; S3, during the lifting and lowering process of the gate (2), the first corrugated sleeve (5) is compressed or stretched with it. When stretched, the spiral pump oil pipe (13) and the spiral pump oil pipe (6) rebound as the groove stretches, and the spiral pump oil pipe (13) pumps the lubricating oil in the oil storage chamber (14) through the pumping end (131), and the spiral pump oil pipe (6) sucks the lubricating oil collected at the bottom of the transmission box (9) through the oil inlet end (62); S4. During compression, the spiral pump oil pipe (13) and the spiral pump oil pipe (6) are squeezed as the groove is compressed. The spiral pump oil pipe (13) squeezes the lubricating oil into the oil distribution pipe (25) through the pump outlet (132), and finally drips the transmission component, the threaded sleeve (23) and the first bevel gear (19) through the plurality of oil drip holes (26), thereby preventing rust and improving the driving performance. The spiral oil return pipe (6) draws the excess lubricating oil back to the oil storage chamber (14) through the oil outlet (61), thereby realizing circulation.

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