Oil cylinder locking device of hydraulic hoist for water conservancy barrier gate and using method of oil cylinder locking device

Abstract

The invention discloses an oil cylinder locking device of a hydraulic hoist for a water conservancy barrier gate, and relates to the technical field of oil cylinder locking of hydraulic hoists, the oil cylinder locking device of the hydraulic hoist for the water conservancy barrier gate comprises a supporting frame, a hydraulic cylinder is fixedly installed at the top of the supporting frame, and the hydraulic cylinder penetrates through the supporting frame; a hydraulic push rod is slidably mounted on the inner wall of the hydraulic cylinder, a gate is fixedly mounted at the bottom of the hydraulic push rod, a clamping device is further arranged at the bottom of the supporting frame, and when oil leakage occurs between the hydraulic cylinder and the hydraulic push rod, the hydraulic push rod can be limited by a sliding key, and the gate is fixedly mounted at the bottom of the gate. The hydraulic push rod can still ensure that the gate is stably locked even under the condition of oil leakage, the sliding key can firmly lock the gate, and accidental movement caused by water flow impact, equipment vibration or external force is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of cylinder locking of hydraulic hoists, and particularly to a cylinder locking device for a hydraulic hoist used in a water conservancy sluice gate. Background Art

[0002] With the continuous development of water conservancy projects, the requirements for hydraulic hoists and their locking devices are getting higher and higher. Traditional locking devices may have problems such as complex mechanical structures, difficult maintenance, or poor environmental adaptability. Therefore, in recent years, many new types of locking device designs have gradually introduced hydraulic technology, intelligent control technology, and automation technology to improve the reliability and intelligence level of the locking devices.

[0003] The patent with the patent announcement number CN210034032U relates to the technical field of cylinder locking of hydraulic hoists, including a housing. A piston rod is installed inside the housing, there is hydraulic oil inside the housing, there is an oil passage on the side wall of the housing, and a push rod is installed inside the oil passage. The push rod contacts a signal generator. When this cylinder locking device of the hydraulic hoist is in use, it sends out information that the piston rod is about to reach the limit position through the contact and separation of the push rod and the push-button switch, and completes the shutdown operation of the oil pump under the control of an industrial computer, achieving the purpose of locking the hydraulic hoist and meeting the use requirements.

[0004] The above patent completes the shutdown operation of the oil pump under the control of an industrial computer, achieves the purpose of locking the hydraulic hoist, and meets the use requirements. However, when the hydraulic cylinder pushes the gate to block the water flow, when there is oil leakage between the hydraulic cylinder and the hydraulic push rod, causing the hydraulic cylinder to be unable to maintain the thrust on the hydraulic push rod, the gate may not be able to completely block the water flow, which may affect the staff who are performing maintenance on water conservancy equipment. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a cylinder locking device for a hydraulic hoist used in a water conservancy sluice gate, which solves the problems raised in the above background art.

[0006] To achieve the above objectives, the present invention is realized through the following technical solutions: A cylinder locking device for a hydraulic hoist used in a water conservancy sluice gate, including a support frame. A hydraulic cylinder is fixedly installed at the top of the support frame. The hydraulic cylinder penetrates the support frame. A hydraulic push rod is slidably installed on the inner wall of the hydraulic cylinder. A gate is fixedly installed at the bottom of the hydraulic push rod. A clamping device is also provided at the bottom of the support frame; The clamping device includes an outer frame, a limiting rod, a pushing block, a fixed block, a fixing plate and a sliding key. The outer frame is fixedly installed at the bottom of the support frame. The hydraulic push rod slides through the inner wall of the outer frame. A chute is formed on the outer wall of the outer frame. The pushing block is slidably installed on the inner wall of the chute. The fixed block is slidably installed on the inner wall of the chute. The limiting rod is fixedly installed on the side of the pushing block away from the hydraulic push rod. The limiting rod is fixedly installed on the side of the fixed block away from the hydraulic push rod. The fixing plate penetrates the inner wall of the outer frame. The fixing plate is fixedly installed on the side of the limiting rod close to the hydraulic push rod. The sliding key is slidably installed on the inner wall of the fixing plate on the side close to the hydraulic push rod.

[0007] According to the above technical solution, the clamping device further includes a push rod, a rotating key, a sliding rod, a long rod and a connecting rod. The push rod slides through the side of the support frame close to the outer frame. The long rod is fixedly installed on the side of the push rod close to the fixed block. One end of the connecting rod is rotatably installed on the top of the fixed block. The other end of the connecting rod is rotatably installed on the end of the long rod away from the push rod. The rotating key is rotatably installed on the outer wall of the support frame. The sliding rod is slidably installed on the side of the support frame close to the rotating key. The sliding key will limit the hydraulic push rod, so that even in the case of oil leakage, the hydraulic push rod can still ensure the stable locking of the gate. The sliding key can firmly lock the gate to prevent accidental movement caused by water flow impact, equipment vibration or external force.

[0008] According to the above technical solution, a square groove is formed on the side of the push rod close to the sliding rod. The sliding rod is in contact with the inside of the square groove. A round hole is formed on the side of the sliding rod close to the rotating key. The rotating key is in contact with the inner wall of the round hole. The sides of the push rod and the pushing block close to each other are set as inclined surfaces. The push rod and the pushing block are set as inclined surfaces to facilitate the push rod to push the pushing block to move. A limiting groove is formed on the side of the hydraulic push rod close to the sliding key. The sliding key is in contact with the inner wall of the limiting groove. The top of the sliding key is provided with an inclined surface. The sliding key is provided with an inclined surface so as not to block the hydraulic push rod when the hydraulic push rod moves downward. A first spring is arranged between the sliding key and the fixing plate. The first spring is arranged to drive the sliding key to return to its original position. A second spring is arranged between the fixed block and the outer frame. The second spring is arranged to drive the fixed block to return to its original position. A third spring is arranged between the push rod and the support frame. The third spring is arranged to drive the push rod to return to its original position. A first torsion spring is arranged between the rotating key and the support frame. The first torsion spring is arranged to drive the rotating key to limit the sliding rod.

[0009] According to the above technical solution, a support device for strengthening the support of the support frame and a protection device for protecting the hydraulic push rod are further provided at the bottom of the support frame. The support device includes a protection plate, a sliding block, a sliding rod, a sliding bar, a top block, an insertion key, an I-shaped rod, a rotating rod, a support rod, and a limiting key. The protection plate is fixedly installed on the outer wall of the gate. The sliding block is slidably installed on one side of the gate close to the protection plate. The sliding rod is slidably installed on one side of the gate close to the protection plate. The sliding bar is slidably installed on one side of the support frame close to the protection plate. The top block is fixedly installed on one side of the sliding bar close to the sliding block. The insertion key is slidably installed on one side of the gate close to the protection plate. A slot is formed on one side of the sliding block close to the insertion key, and the insertion key is in contact with the inner wall of the slot. The I-shaped rod is fixedly installed on one side of the sliding bar away from the protection plate. The rotating rod is rotatably installed on one side of the support frame close to the sliding block. The support rod is slidably installed inside the rotating rod. The limiting key is rotatably installed on one side of the rotating rod away from the support frame, strengthening the support of the support rod for the support frame. Through the support rod, the stability of the support frame can be effectively enhanced, avoiding structural damage or failure of the support frame under the action of large water flow, and preventing damage caused by excessive local stress.

[0010] According to the above technical solution, a square groove is formed on one side of the support rod close to the limiting key, and the limiting key is in contact with the inner wall of the square groove. An inclined surface is provided at the top of the limiting key. The inclined surface of the limiting key is provided to prevent it from blocking the support rod when the support rod moves away from the rotating rod. A round rod is fixedly installed on one side of the I-shaped rod close to the support rod, and the round rod slidably penetrates the support rod.

[0011] According to the above technical solution, a fourth spring is provided between the protection plate and the gate. The fourth spring is provided to generate a rebound to absorb the impact force when the water flow impacts the protection plate. An inclined surface is provided on one side of the sliding block close to the protection plate. The inclined surface of the sliding block is provided to facilitate the protection plate to push the sliding block to move. A fifth spring is provided between the insertion key and the gate. The fifth spring is provided to drive the insertion key back to its original position. A sixth spring is provided between the I-shaped rod and the support frame. The sixth spring is provided to drive the I-shaped rod back to its original position. A seventh spring is provided between the rotating rod and the support rod. The seventh spring is provided to drive the support rod to move away from the rotating rod. A third torsion spring is provided between the limiting key and the rotating rod. The third torsion spring is provided to drive the rotating rod to rotate. A fourth torsion spring is provided between the rotating rod and the support frame. The fourth torsion spring is provided to drive the rotating rod to rotate.

[0012] According to the above technical solution, the protection device includes a vertical rod, a blocking rod, an outer rod, a rotating rod, a clamping plate, a fixed square plate, a fixed key, a square block and a sliding key. The vertical rod is fixedly installed at the top of the sliding rod. The outer rod is rotatably installed on one side of the outer frame close to the protection plate. The blocking rod is slidably installed on the inner wall of the outer rod. The rotating rod is rotatably installed on one side of the outer frame close to the blocking rod. The clamping plates are respectively fixedly installed on the side of the rotating rod away from the outer frame. The fixed square plate is fixedly installed on the circumferential surface of the front clamping plate. The fixed key is slidably installed on the circumferential surface of the rear clamping plate. The square block is fixedly installed on one side of the outer rod close to the limiting rod. The sliding key is slidably installed on one side of the outer frame close to the limiting rod. The blocking rod can help the gate maintain stability, prevent it from being affected by uneven pressure, enhance the structural strength of the entire gate, and enable it to withstand greater pressure. In this way, even under extreme water flow or weather conditions, the gate can still work properly.

[0013] According to the above technical solution, the sliding key slidably penetrates the rotating rod. A fifth torsion spring is provided between the outer rod and the outer frame. The fifth torsion spring is provided to drive the rotation of the outer rod. A sixth torsion spring is provided between the rotating rod and the outer frame. The sixth torsion spring is provided to drive the rotation of the rotating rod. An eighth spring is provided between the blocking rod and the outer rod. The eighth spring is provided to drive the movement of the blocking rod. A fixing opening is formed at the top of the fixed square plate. The shape of the fixed key matches the shape of the fixing opening. A ninth spring is provided between the fixed key and the clamping plate. The ninth spring is provided to drive the fixed key to return to its original position. A slope is provided on the side of the fixed key away from the clamping plate.

[0014] A using method of an oil cylinder locking device for a hydraulic hoist of a water conservancy sluice gate includes the following steps: Step 1: When it is necessary to lower the gate to cut off the water flow, the pressure inside the hydraulic cylinder will increase. The increase in the pressure inside the hydraulic cylinder will push the hydraulic push rod to move away from the hydraulic cylinder. The movement of the hydraulic push rod will push the gate to move, and the movement of the gate will cut off the water flow. Step 2: The movement of the hydraulic push rod will contact the slope of the sliding key. When the hydraulic push rod moves downward, the sliding key will not limit the hydraulic push rod. Step 3: When the hydraulic push rod stops descending, the sliding key will contact the inner wall of the limiting groove. When the hydraulic cylinder and the hydraulic push rod cannot maintain the thrust on the hydraulic push rod due to oil leakage, the sliding key will limit the hydraulic push rod.

[0015] The present invention provides an oil cylinder locking device for a hydraulic hoist of a water conservancy sluice gate. It has the following beneficial effects: (1) In this invention, when the hydraulic push rod stops descending, the sliding key will contact the inner wall of the limit groove. Then, when there is oil leakage between the hydraulic cylinder and the hydraulic push rod, causing the hydraulic cylinder to be unable to maintain the thrust on the hydraulic push rod, the sliding key will limit the hydraulic push rod, ensuring that the gate can still be stably locked even in the case of oil leakage. The sliding key can firmly lock the gate, preventing accidental movement caused by water flow impact, equipment vibration, or external force.

[0016] (2) In this invention, when the support rod moves, the limit key will contact the inner wall of the square groove to limit the support rod, preventing the support rod from sliding into the rotating rod. This strengthens the support of the support rod for the support frame. Through the support rod, the stability of the support frame can be effectively enhanced, avoiding structural damage or failure of the support frame under the action of large water flows, and preventing damage caused by excessive local stress.

[0017] (3) In this invention, when the protection plate is impacted, it can push the sliding block to move. To avoid accidentally touching the protection plate during transportation and causing the protection plate to push the sliding block to move, the support rod may be accidentally ejected due to vibration or improper operation, resulting in damage to the support rod or abnormal operation. Limiting the sliding block can prevent the support rod from being accidentally ejected during transportation, not only improving the safety of transportation but also ensuring the stability and reliability of the support rod during use, reducing the maintenance cost of the equipment, and ensuring its long-term reliable operation.

[0018] (4) In this invention, when the limit of the stop rod is released, the stop rod will be pushed by the No. 8 spring to move away from the outer rod. Then, the stop rod will contact the gate, increasing the force-bearing effect on the gate and avoiding deformation of the gate. Especially in strong water flows or harsh environmental conditions, the stop rod can help the gate maintain stability, prevent it from being affected by uneven pressure, enhance the structural strength of the entire gate, enabling it to withstand greater pressure. Thus, even under extreme water flow or weather conditions, the gate can still operate normally.

[0019] (5) In this invention, when the clamping plate moves, it will drive the fixed square plate to move. When the clamping plate contacts the hydraulic push rod, the fixed key will contact the fixed opening on the surface of the fixed square plate. Then, the clamping plate will protect the hydraulic push rod, avoiding deformation of the hydraulic push rod. The hydraulic push rod is prone to being subjected to uneven pressure or external impact during long-term use, resulting in bending, deformation, or damage. By protecting the hydraulic push rod, it can be ensured that it maintains a good shape and function during operation, thereby improving the stability and reliability of the entire hydraulic system. Brief Description of the Drawings

[0020] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of the position structure of the outer frame and the limit rod of the present invention; Figure 3 is for the present inventionFigure 2 Schematic diagram of the enlarged structure of part A; Figure 4 Schematic diagram of the position structure of the push rod and the long rod of the present invention; Figure 5 For the present invention Figure 4 Schematic diagram of the enlarged structure of part B; Figure 6 Schematic diagram of the position structure of the sliding block and the sliding rod of the present invention; Figure 7 Schematic diagram of the position structure of the rotating rod and the clamping plate of the present invention; Figure 8 Schematic diagram of the position structure of the clamping plate and the fixing key of the present invention; Figure 9 For the present invention Figure 8 Schematic diagram of the enlarged structure of part C.

[0021] In the figure: 1, support frame; 2, hydraulic cylinder; 3, hydraulic push rod; 4, gate; 5, outer frame; 6, limiting rod; 7, push rod; 8, rotating key; 9, sliding rod; 10, push block; 11, fixed block; 12, fixing plate; 13, sliding key; 14, long rod; 15, connecting rod; 21, protection plate; 22, sliding block; 23, sliding rod; 24, sliding rod; 25, top block; 26, inserting key; 27, I-shaped rod; 28, rotating rod; 29, support rod; 291, limiting key; 31, vertical rod; 32, blocking rod; 33, outer rod; 34, rotating rod; 35, clamping plate; 36, fixed square plate; 37, fixing key; 38, square block; 39, sliding key. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] Please refer to Figures 1-9 , an embodiment of the present invention is: an oil cylinder locking device for a hydraulic hoist for a water conservancy sluice, including a support frame 1, a hydraulic cylinder 2 is fixedly installed on the top of the support frame 1, the hydraulic cylinder 2 penetrates the support frame 1, a hydraulic push rod 3 is slidably installed on the inner wall of the hydraulic cylinder 2, a gate 4 is fixedly installed at the bottom of the hydraulic push rod 3, and a clamping device is further provided at the bottom of the support frame 1; The clamping device includes an outer frame 5, a limiting rod 6, a pushing block 10, a fixing block 11, a fixing plate 12 and a sliding key 13. The outer frame 5 is fixedly installed at the bottom of the support frame 1. The hydraulic push rod 3 slides through the inner wall of the outer frame 5. A chute is formed on the outer wall of the outer frame 5. The pushing block 10 is slidably installed on the inner wall of the chute. The fixing block 11 is slidably installed on the inner wall of the chute. The limiting rod 6 is fixedly installed on the side of the pushing block 10 away from the hydraulic push rod 3. The limiting rod 6 is fixedly installed on the side of the fixing block 11 away from the hydraulic push rod 3. The fixing plate 12 penetrates through the inner wall of the outer frame 5. The fixing plate 12 is fixedly installed on the side of the limiting rod 6 close to the hydraulic push rod 3. The sliding key 13 is slidably installed on the inner wall of the fixing plate 12 on the side close to the hydraulic push rod 3.

[0024] The clamping device further includes a push rod 7, a rotating key 8, a sliding rod 9, a long rod 14 and a connecting rod 15. The push rod 7 slides through the side of the support frame 1 close to the outer frame 5. The long rod 14 is fixedly installed on the side of the push rod 7 close to the fixing block 11. One end of the connecting rod 15 is rotatably installed on the top of the fixing block 11. The other end of the connecting rod 15 is rotatably installed on the end of the long rod 14 away from the push rod 7. The rotating key 8 is rotatably installed on the outer wall of the support frame 1. The sliding rod 9 is slidably installed on the side of the support frame 1 close to the rotating key 8. The sliding key 13 will limit the hydraulic push rod 3, so that even in the case of oil leakage of the hydraulic push rod 3, the gate 4 can still be stably locked. The sliding key 13 can firmly lock the gate 4 to prevent accidental movement caused by water flow impact, equipment vibration or external force.

[0025] A square groove is formed on the side of the push rod 7 close to the sliding rod 9. The sliding rod 9 contacts the inside of the square groove. A round hole is formed on the side of the sliding rod 9 close to the rotating key 8. The rotating key 8 contacts the inner wall of the round hole. The sides of the push rod 7 and the pushing block 10 facing each other are set as inclined planes. The push rod 7 and the pushing block 10 are set as inclined planes to facilitate the push rod 7 to push the pushing block 10 to move. A limiting groove is formed on the side of the hydraulic push rod 3 close to the sliding key 13. The sliding key 13 contacts the inner wall of the limiting groove. A sloping surface is provided on the top of the sliding key 13. The sloping surface is provided on the sliding key 13 so as not to block the hydraulic push rod 3 when the hydraulic push rod 3 moves downward. A first spring is provided between the sliding key 13 and the fixing plate 12. The first spring is provided to drive the sliding key 13 back to its original position. A second spring is provided between the fixing block 11 and the outer frame 5. The second spring is provided to drive the fixing block 11 back to its original position. A third spring is provided between the push rod 7 and the support frame 1. The third spring is provided to drive the push rod 7 back to its original position. A first torsion spring is provided between the rotating key 8 and the support frame 1. The first torsion spring is provided to drive the rotating key 8 to limit the sliding rod 9.

[0026] A method for using the oil cylinder locking device of a hydraulic hoist for a water conservancy sluice gate includes the following steps: Step 1: When the gate 4 needs to be lowered to cut off the water flow, the pressure inside the hydraulic cylinder 2 will increase. The increase in the pressure inside the hydraulic cylinder 2 will push the hydraulic push rod 3 to move away from the hydraulic cylinder 2. The movement of the hydraulic push rod 3 will push the gate 4 to move, and the movement of the gate 4 will cut off the water flow. Step 2: The movement of the hydraulic push rod 3 will contact the inclined surface of the sliding key 13. When the hydraulic push rod 3 moves downward, the sliding key 13 will not limit the hydraulic push rod 3. Step 3: When the hydraulic push rod 3 stops descending, the sliding key 13 will contact the inner wall of the limit groove. When the hydraulic cylinder 2 and the hydraulic push rod 3 cannot maintain the thrust on the hydraulic push rod 3 due to oil leakage, the sliding key 13 will limit the hydraulic push rod 3.

[0027] During the operation of this embodiment: When maintaining, inspecting or overhauling water conservancy facilities, it is necessary to lower the gate 4 to cut off the water flow to ensure the safety of the working section. When the gate 4 needs to be lowered to cut off the water flow, the pressure inside the hydraulic cylinder 2 will increase. The increase in the pressure inside the hydraulic cylinder 2 will push the hydraulic push rod 3 to move away from the hydraulic cylinder 2. The movement of the hydraulic push rod 3 will push the gate 4 to move, and the movement of the gate 4 will cut off the water flow. The movement of the hydraulic push rod 3 will contact the inclined surface of the sliding key 13. When the hydraulic push rod 3 moves, the sliding key 13 will not limit the hydraulic push rod 3. When the hydraulic push rod 3 stops descending, the sliding key 13 will contact the inner wall of the limit groove. When oil leakage occurs between the hydraulic cylinder 2 and the hydraulic push rod 3, causing the hydraulic cylinder 2 to be unable to maintain the thrust on the hydraulic push rod 3, the sliding key 13 will limit the hydraulic push rod 3, so that the hydraulic push rod 3 can still ensure the stable locking of the gate 4 even in the case of oil leakage. The sliding key 13 can firmly lock the gate 4 to prevent accidental movement caused by water flow impact, equipment vibration or external force. When it is necessary to release the limit of the sliding key 13 on the hydraulic push rod 3 after the work is completed, the operator needs to press the rotating key 8. The rotation of the rotating key 8 will release the limit on the sliding rod 9. After the limit on the sliding rod 9 is released, pull the sliding rod 9 to slide away from the push rod 7. The movement of the sliding rod 9 will release the limit on the push rod 7, so that the push rod 7 can slide into the outer frame 5. Push the push rod 7 to slide into the outer frame 5. The sliding of the push rod 7 into the outer frame 5 will contact the inclined surface of the push block 10, so that the push rod 7 will push the push block 10 to slide away from the outer frame 5. The movement of the push rod 7 will push the long rod 14 to move. The movement of the long rod 14 will push the connecting rod 15 to move. The movement of the connecting rod 15 will push the fixed block 11 to slide away from the outer frame 5. The movement of the fixed block 11 and the push block 10 away from the outer frame 5 will push the limit rod 6 to move. The movement of the limit rod 6 will drive the sliding key 13 to move away from the hydraulic push rod 3, and the limit on the hydraulic push rod 3 will be released. The limit on the hydraulic push rod 3 can only be manually released after the work is completed, which can effectively prevent the accidental release of the limit on the hydraulic push rod 3 during the operation and ensure the safety of the operation.

[0028] Please refer to Figures 1-9 Figures 1-9 , on the basis of the above embodiments, in another embodiment of the present invention, a support device for strengthening the support of the support frame 1 and a protection device for protecting the hydraulic push rod 3 are further provided at the bottom of the support frame 1. The support device includes a protection plate 21, a sliding block 22, a sliding rod 23, a sliding bar 24, a top block 25, an insertion key 26, an I-shaped rod 27, a rotating rod 28, a support rod 29, and a limit key 291. The protection plate 21 is fixedly installed on the outer wall of the gate 4. The sliding block 22 is slidably installed on one side of the gate 4 close to the protection plate 21. The sliding rod 23 is slidably installed on one side of the gate 4 close to the protection plate 21. The sliding bar 24 is slidably installed on one side of the support frame 1 close to the protection plate 21. The top block 25 is fixedly installed on one side of the sliding bar 24 close to the sliding block 22. The insertion key 26 is slidably installed on one side of the gate 4 close to the protection plate 21. A slot is opened on one side of the sliding block 22 close to the insertion key 26, and the insertion key 26 is in contact with the inner wall of the slot. The I-shaped rod 27 is fixedly installed on one side of the sliding bar 24 away from the protection plate 21. The rotating rod 28 is rotatably installed on one side of the support frame 1 close to the sliding block 22. The support rod 29 is slidably installed inside the rotating rod 28. The limit key 291 is rotatably installed on one side of the rotating rod 28 away from the support frame 1 to strengthen the support of the support rod 29 for the support frame 1. Through the support rod 29, the stability of the support frame 1 can be effectively enhanced, preventing the support frame 1 from suffering from structural damage or failure under the action of large water flow and preventing damage caused by excessive local stress.

[0029] A square groove is opened on one side of the support rod 29 close to the limit key 291, and the limit key 291 is in contact with the inner wall of the square groove. The top of the limit key 291 is provided with an inclined surface. The inclined surface of the limit key 291 is provided to prevent the limit key 291 from blocking the support rod 29 when the support rod 29 moves away from the rotating rod 28. A round rod is fixedly installed on one side of the I-shaped rod 27 close to the support rod 29, and the round rod slidably penetrates through the support rod 29.

[0030] A fourth spring is provided between the protection plate 21 and the gate 4. The fourth spring is provided to generate a rebound force to absorb the impact force when the water flow impacts the protection plate 21. An inclined surface is provided on one side of the sliding block 22 close to the protection plate 21. The inclined surface of the sliding block 22 is provided to facilitate the protection plate 21 to push the sliding block 22 to move. A fifth spring is provided between the insertion key 26 and the gate 4. The fifth spring is provided to drive the insertion key 26 back to its original position. A sixth spring is provided between the I-shaped rod 27 and the support frame 1. The sixth spring is provided to drive the I-shaped rod 27 back to its original position. A seventh spring is provided between the rotating rod 28 and the support rod 29. The seventh spring is provided to drive the support rod 29 to move away from the rotating rod 28. A third torsion spring is provided between the limit key 291 and the rotating rod 28. The third torsion spring is provided to drive the rotating rod 28 to rotate. A fourth torsion spring is provided between the rotating rod 28 and the support frame 1. The fourth torsion spring is provided to drive the rotating rod 28 to rotate.

[0031] The protection device includes a vertical rod 31, a blocking rod 32, an outer rod 33, a rotating rod 34, a clamping plate 35, a fixed square plate 36, a fixed key 37, a square block 38 and a sliding key 39. The vertical rod 31 is fixedly installed at the top of the sliding rod 24. The outer rod 33 is rotatably installed on one side of the outer frame 5 close to the protection plate 21. The blocking rod 32 is slidably installed on the inner wall of the outer rod 33. The rotating rod 34 is rotatably installed on one side of the outer frame 5 close to the blocking rod 32. The clamping plates 35 are respectively fixedly installed on the side of the rotating rod 34 away from the outer frame 5. The fixed square plate 36 is fixedly installed on the circumferential surface of the front clamping plate 35. The fixed key 37 is slidably installed on the circumferential surface of the rear clamping plate 35. The square block 38 is fixedly installed on one side of the outer rod 33 close to the limiting rod 6. The sliding key 39 is slidably installed on one side of the outer frame 5 close to the limiting rod 6. The blocking rod 32 can help the gate 4 to maintain stability, prevent it from being affected by uneven pressure, enhance the structural strength of the entire gate 4, and enable it to withstand greater pressure. In this way, even under extreme water flow or weather conditions, the gate 4 can still work normally.

[0032] The sliding key 39 slidably penetrates through the rotating rod 34. A fifth torsion spring is provided between the outer rod 33 and the outer frame 5. The fifth torsion spring is provided to drive the outer rod 33 to rotate. A sixth torsion spring is provided between the rotating rod 34 and the outer frame 5. The sixth torsion spring is provided to drive the rotating rod 34 to rotate. An eighth spring is provided between the blocking rod 32 and the outer rod 33. The eighth spring is provided to drive the blocking rod 32 to move. A fixing opening is formed at the top of the fixed square plate 36. The shape of the fixed key 37 matches the shape of the fixing opening. A ninth spring is provided between the fixed key 37 and the clamping plate 35. The ninth spring is provided to drive the fixed key 37 to return to its original position. A slope is provided on the side of the fixed key 37 away from the clamping plate 35.

[0033] During the operation of this embodiment: When the gate 4 blocks the water flow, the protection plate 21 will absorb part of the impact force of the water flow, preventing the excessive impact force of the water flow from affecting the gate 4. When the impact force of the water flow is too large, the protection plate 21 will move towards the gate 4 due to the impact force of the water flow. When the protection plate 21 moves, it will contact the inclined surface of the sliding block 22, then the sliding block 22 will be pushed by the protection plate 21 to slide towards the sliding rod 23. Then the sliding block 22 will contact the inclined surface of the sliding rod 23, and the sliding block 22 will push the sliding rod 23 to move towards the sliding rod 24. The movement of the sliding rod 23 will push the sliding rod 24 to move, and the movement of the sliding rod 24 will push the I-shaped rod 27 to move away from the rotating rod 28. The movement of the I-shaped rod 27 will drive the round rod to move, then the limit of the support rod 29 will be released. When the limit of the support rod 29 is released, the limit of the rotating rod 28 will also be released. Then the rotating rod 28 will be driven by the fourth torsion spring to rotate away from the support frame 1. When the limit of the support rod 29 is released, the support rod 29 will be pushed by the seventh spring to move away from the rotating rod 28. Then the support rod 29 will contact the ground to support the support frame 1. When the support rod 29 moves, the limit key 291 will contact the inner wall of the square groove to limit the support rod 29 so that the support rod 29 will not slide into the rotating rod 28, strengthening the support of the support rod 29 for the support frame 1. Through the support rod 29, the stability of the support frame 1 can be effectively enhanced, preventing the support frame 1 from suffering from structural damage or failure under the action of large water flow, and preventing damage caused by excessive local stress. When the gate 4 blocks the water flow, the gate 4 will move downward. The downward movement of the gate 4 will drive the insertion key 26 to move. The movement of the insertion key 26 will release the contact with the top block 25. Then the insertion key 26 will be pulled by the fifth spring to slide away from the sliding block 22. The movement of the insertion key 26 will release the limit on the sliding block 22, enabling the protection plate 21 to push the sliding block 22 to move when impacted, preventing the protection plate 21 from accidentally touching the protection plate 21 during transportation and causing the protection plate 21 to push the sliding block 22 to move. Then the support device may be accidentally triggered and ejected due to vibration or improper operation, resulting in damage to the support rod 29 or abnormal operation. Limiting the sliding block 22 can prevent the support rod 29 from being accidentally ejected during transportation, which can not only improve the safety of transportation but also ensure the stability and reliability of the support rod 29 during use, reducing the maintenance cost of the equipment and ensuring its long-term reliable operation.

[0034] When the sliding rod 24 moves, it will drive the vertical rod 31 to move. The movement of the vertical rod 31 will release the block on the blocking rod 32. When the blocking of the blocking rod 32 is released, the outer rod 33 will be driven by the fifth torsion spring to rotate towards the direction close to the gate 4. When the limit of the blocking rod 32 is released, the blocking rod 32 will be pushed by the eighth spring to move away from the outer rod 33. Then the blocking rod 32 will contact the gate 4 to increase the force-bearing effect of the gate 4, avoiding the deformation of the gate 4. Especially in strong water flow or harsh environmental conditions, the blocking rod 32 can help the gate 4 maintain stability, prevent it from being affected by uneven pressure, enhance the structural strength of the entire gate 4, enabling it to withstand greater pressure. In this way, even under extreme water flow or weather conditions, the gate 4 can still work normally. The rotation of the outer rod 33 will drive the square block 38 to move. The movement of the square block 38 will push the sliding key 39 to move away from the rotating rod 34. Then the limit of the rotating rod 34 is released, and the rotating rod 34 will be driven by the sixth torsion spring to rotate towards the direction of the hydraulic push rod 3. The rotation of the rotating rod 34 will drive the clamping plate 35 to move. The movement of the clamping plate 35 will drive the fixed square plate 36 to move. When the clamping plate 35 contacts the hydraulic push rod 3, the fixed key 37 will contact the fixing port on the surface of the fixed square plate 36. Then the clamping plate 35 will protect the hydraulic push rod 3, avoiding the deformation of the hydraulic push rod 3. The hydraulic push rod 3 is prone to being subjected to uneven pressure or external impact during long-term use, resulting in bending, deformation or damage. By protecting the hydraulic push rod 3, it can be ensured that it maintains a good shape and function during operation, thereby improving the stability and reliability of the entire hydraulic system.

[0035] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cylinder locking device for a hydraulic gate hoist, comprising a support frame (1), characterized in that: A hydraulic cylinder (2) is fixedly mounted on the top of the support frame (1), the hydraulic cylinder (2) passes through the support frame (1), a hydraulic push rod (3) is slidably mounted on the inner wall of the hydraulic cylinder (2), a gate (4) is fixedly mounted on the bottom of the hydraulic push rod (3), and a clamping device is also provided at the bottom of the support frame (1); The clamping device comprises an outer frame (5), a limiting rod (6), a push block (10), a fixed block (11), a fixed plate (12) and a sliding key (13); the outer frame (5) is fixedly mounted on the bottom of the support frame (1); the hydraulic push rod (3) slides through the inner wall of the outer frame (5); a sliding groove is provided on the outer wall of the outer frame (5); the push block (10) is slidably mounted on the inner wall of the sliding groove; the fixed block (11) is slidably mounted on the inner wall of the sliding groove; the limiting rod (6) is fixedly mounted on a side of the push block (10) away from the hydraulic push rod (3); the limiting rod (6) is fixedly mounted on a side of the fixed block (11) away from the hydraulic push rod (3); the fixed plate (12) penetrates the inner wall of the outer frame (5); the fixed plate (12) is fixedly mounted on a side of the limiting rod (6) close to the hydraulic push rod (3); and the sliding key (13) is slidably mounted on the inner wall of the fixed plate (12) close to the hydraulic push rod (3).

2. The cylinder locking device of the hydraulic gate hoist according to claim 1 is characterized in that: The clamping device further comprises a push rod (7), a rotating key (8), a sliding rod (9), a long rod (14) and a connecting rod (15); the push rod (7) slides through a side of the support frame (1) close to the outer frame (5); the long rod (14) is fixedly mounted on a side of the push rod (7) close to the fixed block (11); one end of the connecting rod (15) is rotatably mounted on the top of the fixed block (11); the other end of the connecting rod (15) is rotatably mounted on an end of the long rod (14) away from the push rod (7); the rotating key (8) is rotatably mounted on the outer wall of the support frame (1); and the sliding rod (9) is slidably mounted on a side of the support frame (1) close to the rotating key (8); The bottom of the support frame (1) is also provided with a support device for strengthening the support of the support frame (1) and a protection device for protecting the hydraulic push rod (3).

3. The cylinder locking device of the hydraulic gate hoist according to claim 2 is characterized in that: A square groove is provided on the side of the push rod (7) close to the sliding rod (9), and the sliding rod (9) contacts the inside of the square groove. A round hole is provided on the side of the sliding rod (9) close to the rotating key (8), and the rotating key (8) contacts the inner wall of the round hole. A slope is provided on the side where the push rod (7) and the push block (10) are close to each other. A limiting groove is provided on the side of the hydraulic push rod (3) close to the sliding key (13), and the sliding key (13) contacts the inner wall of the limiting groove. A slope is provided on the top of the sliding key (13). A No. 1 spring is provided between the sliding key (13) and the fixed plate (12), a No. 2 spring is provided between the fixed block (11) and the outer frame (5), a No. 3 spring is provided between the push rod (7) and the support frame (1), and a No. 1 torsion spring is provided between the rotating key (8) and the support frame (1).

4. The cylinder locking device of the hydraulic gate hoist for water conservancy gate according to claim 3, characterized in that; The supporting device comprises a protection plate (21), a sliding block (22), a sliding rod (23), a sliding rod (24), a top block (25), a key (26), an I-shaped rod (27), a rotating rod (28), a support rod (29) and a limit key (291); the protection plate (21) is fixedly mounted on the outer wall of the gate (4); the sliding block (22) is slidably mounted on a side of the gate (4) close to the protection plate (21); the sliding rod (23) is slidably mounted on a side of the gate (4) close to the protection plate (21); the sliding rod (24) is slidably mounted on a side of the supporting frame (1) close to the protection plate (21); and the top block (25) is fixedly mounted on the outer wall of the gate (4). The sliding rod (24) is on a side close to the sliding block (22); the key (26) is slidably mounted on a side of the gate (4) close to the protective plate (21); a slot is provided on a side of the sliding block (22) close to the key (26); the key (26) contacts the inner wall of the slot; the I-shaped rod (27) is fixedly mounted on a side of the sliding rod (24) away from the protective plate (21); the rotating rod (28) is rotatably mounted on a side of the support frame (1) close to the sliding block (22); the support rod (29) is slidably mounted on the inner wall of the rotating rod (28); and the limit key (291) is rotatably mounted on a side of the rotating rod (28) away from the support frame (1).

5. The cylinder locking device of the hydraulic gate hoist according to claim 4 is characterized in that: A square groove is provided on one side of the support rod (29) close to the limit key (291), the limit key (291) contacts the inner wall of the square groove, an inclined surface is provided on the top of the limit key (291), and a round rod is fixedly mounted on one side of the I-shaped rod (27) close to the support rod (29), the round rod slidably passing through the support rod (29).

6. The cylinder locking device of the hydraulic gate hoist according to claim 5 is characterized in that: A No. 4 spring is provided between the protection plate (21) and the gate (4); a slope is provided on a side of the sliding block (22) close to the protection plate (21); a No. 5 spring is provided between the insertion key (26) and the gate (4); a No. 6 spring is provided between the I-shaped rod (27) and the support frame (1); a No. 7 spring is provided between the rotating rod (28) and the support rod (29); a No. 3 torsion spring is provided between the limit key (291) and the rotating rod (28); and a No. 4 torsion spring is provided between the rotating rod (28) and the support frame (1).

7. The cylinder locking device of the hydraulic gate hoist according to claim 6 is characterized in that: The protective device comprises a vertical rod (31), a blocking rod (32), an outer rod (33), a rotating rod (34), a clamping plate (35), a fixed square plate (36), a fixed key (37), a square block (38) and a sliding key (39), wherein the vertical rod (31) is fixedly mounted on the top of the sliding rod (24), the outer rod (33) is rotatably mounted on a side of the outer frame (5) close to the protective plate (21), the blocking rod (32) is slidably mounted on the inner wall of the outer rod (33), and the rotating rod (34) is rotatably mounted on the outer frame (5). The frame (5) is on a side close to the stop rod (32), the clamping plates (35) are respectively fixedly mounted on a side of the rotating rod (34) away from the outer frame (5), the fixed square plate (36) is fixedly mounted on the circumferential surface of the front clamping plate (35), the fixed key (37) is slidably mounted on the circumferential surface of the rear clamping plate (35), the square block (38) is fixedly mounted on a side of the outer rod (33) close to the limit rod (6), and the sliding key (39) is slidably mounted on a side of the outer frame (5) close to the limit rod (6).

8. The cylinder locking device of the hydraulic gate hoist according to claim 7 is characterized in that: The sliding key (39) slides through the rotating rod (34), a No. 5 torsion spring is provided between the outer rod (33) and the outer frame (5), a No. 6 torsion spring is provided between the rotating rod (34) and the outer frame (5), a No. 8 spring is provided between the blocking rod (32) and the outer rod (33), a fixing opening is provided at the top of the fixed square plate (36), the shape of the fixing key (37) matches the shape of the fixing opening, a No. 9 spring is provided between the fixing key (37) and the clamping plate (35), and a slope is provided on the side of the fixing key (37) away from the clamping plate (35).

9. A method for using a cylinder locking device of a hydraulic gate hoist for a water conservancy gate, using the cylinder locking device of a hydraulic gate hoist for a water conservancy gate according to claim 8, characterized in that: The following steps are involved: Step 1: When the gate (4) needs to be lowered to cut off the water flow, the pressure inside the hydraulic cylinder (2) will increase. The increase in pressure inside the hydraulic cylinder (2) will push the hydraulic push rod (3) to move in a direction away from the hydraulic cylinder (2). The movement of the hydraulic push rod (3) will push the gate (4) to move. The movement of the gate (4) will cut off the water flow. Step 2: When the hydraulic push rod (3) moves, it contacts the inclined surface of the sliding key (13), so when the hydraulic push rod (3) moves downward, the sliding key (13) will not limit the hydraulic push rod (3); Step 3: When the hydraulic push rod (3) stops descending, the sliding key (13) will contact the inner wall of the limit groove. When the hydraulic cylinder (2) and the hydraulic push rod (3) cannot maintain the thrust on the hydraulic push rod (3) due to oil leakage, the sliding key (13) will limit the hydraulic push rod (3).

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