Integrated telescoping cylinder barrier mechanism, system and control method

Abstract

The application provides an integrated telescopic cylinder barrier mechanism, system and control method, relates to the technical field of rail transit platform safety protection, and the integrated telescopic cylinder barrier mechanism comprises a driving cylinder, a horizontal barrier, a floating plate, a gas supply device and a plurality of multistage telescopic cylinders, the multistage telescopic cylinder comprises a first barrier, a second barrier and a third barrier, the lower end of the first barrier is installed in an underground groove through a fixed base, the outer wall of the upper end of the first barrier is fixedly connected with the floating plate, the upper end of the third barrier is connected with the lower surface of the horizontal barrier, the driving cylinder is arranged on the fixed base, the output end of the driving cylinder is connected with the lower surface of the floating plate, and the output end of the gas supply device is connected with the driving cylinder and the multistage telescopic cylinder respectively. In the application, the coaxial nesting structure design of the first barrier, the second barrier and the third barrier is adopted in the multistage telescopic cylinder, the length of the multistage telescopic cylinder in the retracted state can be greatly shortened, therefore, the excavation depth of the underground deep hole is reduced during installation, and the construction efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of safety protection technology for rail transit platforms, and particularly to an integrated telescopic cylinder railing mechanism, system, and control method. Background Technology

[0002] During the operation of high-speed railway platforms, edge protection of the foundation pit is a key link to ensure passenger safety. Lifting guardrails are widely used because they can flexibly switch between "protection" and "passage" modes.

[0003] For example, Chinese Patent No. CN221073937U provides a lifting platform door, which includes multiple pre-embedded boxes that are spaced apart and buried underground, and a drive device set in the pre-embedded boxes. The drive device is driven to a telescopic column that is vertically set in the pre-embedded box. A door body is fixedly connected between adjacent telescopic columns. A clearance groove is provided on the adjacent side of the pre-embedded box, and the size of the clearance groove is adapted to the size of the door body. In this application, the door body can be opened and closed as needed through the drive device and telescopic columns, which facilitates passengers getting on and off the vehicle.

[0004] To improve safety, the protective height of lifting platform screen doors should be at least 1200mm. However, the aforementioned lifting platform screen doors rely on independent telescopic columns to achieve lifting and lowering. During installation, it is necessary to drill a deep hole of more than 1500mm in the ground to accommodate the telescopic columns. Due to the narrow underground space of the platform, the construction efficiency is extremely low, and it is easy to disturb the soil or damage the underlying pipelines and structures, causing damage to the underlying pipelines or structures, resulting in safety hazards and construction delays. Summary of the Invention

[0005] This invention provides an integrated telescopic cylinder railing mechanism, system, and control method to solve the technical problem that the installation of telescopic columns requires drilling deep holes underground, which is limited by the narrow underground space of the platform and results in extremely low construction efficiency.

[0006] To address the aforementioned technical problems, this invention discloses an integrated telescopic cylinder railing mechanism, comprising: a drive cylinder, a horizontal railing, a float, an air supply device, and several multi-stage telescopic cylinders. Each multi-stage telescopic cylinder includes a first railing, a second railing, and a third railing arranged coaxially. The lower end of the first railing is installed in an underground trench via a fixed base, and the upper outer wall of the first railing is fixedly connected to the float. The second railing is slidably disposed within the first railing, and the third railing is slidably disposed within the second railing. The upper end of the third railing is connected to the lower surface of the horizontal railing. The drive cylinder is mounted on the fixed base, and its output end is connected to the lower surface of the float. The air supply device is disposed in the underground trench, and its output end is connected to both the drive cylinder and the multi-stage telescopic cylinders.

[0007] Preferably, a sealing assembly is provided between the third railing and the second railing. The sealing assembly includes a fixing ring and a protective sleeve. The fixing ring is located on the outer periphery of the upper end of the third railing, and a pressure ring is provided at the bottom of the fixing ring. The protective sleeve is fitted over the outside of the third railing, and the lower end of the protective sleeve is connected to the upper surface of the second railing.

[0008] Preferably, a sealing gap is provided between the lower pressure ring and the outer wall of the third railing, and a sealing sleeve is fitted on the outside of the third railing. The lower end of the sealing sleeve is connected to the upper end of the protective sleeve, and the sealing sleeve is adapted to the sealing gap.

[0009] Preferably, the protective sleeve has a plurality of sliding holes arranged in a circular array about the central axis of the protective sleeve. A sliding cavity is provided near the lower outer side of the sliding hole, and the sliding cavity is located inside the protective sleeve. The inner side of the sliding cavity communicates with the sliding hole. A piston rod is slidably installed in the sliding hole. A piston ring is provided outside the piston rod. The piston rod is slidably connected to the inner wall of the sliding cavity. A first spring is sleeved outside the piston rod. The upper end of the first spring is connected to the lower surface of the piston ring, and the lower end of the first spring is connected to the bottom wall of the sliding cavity. A first inclined surface is provided at the upper end of the piston rod. The height of the piston rod near the third rail is higher than the height of the piston rod away from the third rail. A second inclined surface adapted to the first inclined surface is provided at the bottom of the lower pressure ring.

[0010] Preferably, an annular liquid storage chamber is provided inside the protective sleeve, and the annular liquid storage chamber is located below the sliding hole. The annular liquid storage chamber is connected to the interior of the sliding chamber through a liquid supply pipe. An inlet chamber is provided near the lower end of the piston rod, and an inlet hole is provided on the side wall of the piston rod. The inlet chamber is connected to the sliding chamber through the inlet hole. The diameter of the inlet hole is larger than the diameter of the liquid supply pipe. A first flow channel is vertically provided inside the piston rod. One end of the first flow channel is connected to the inlet chamber, and the other end of the first flow channel passes through the upper end of the piston rod. A one-way valve is provided at the lower end of the first flow channel.

[0011] Preferably, a liquid outlet column is slidably arranged up and down in the first flow channel, and a plurality of liquid outlet holes are provided on the upper side wall of the liquid outlet column. A second flow channel is vertically arranged in the liquid outlet column, the lower end of the second flow channel is connected to the first flow channel, and the upper end of the second flow channel is connected to the liquid outlet holes. A fixing plate is provided below the liquid outlet column, one end of the fixing plate is connected to the inner wall of the first flow channel, and the fixing plate and the liquid outlet column are connected by a second spring.

[0012] Preferably, a liquid replenishment pipe is provided on the side wall of the protective sleeve, and one end of the liquid replenishment pipe is connected to the inside of the annular liquid storage cavity.

[0013] Preferably, a screw cap is provided at the end of the replenishment tube away from the protective sleeve.

[0014] An integrated telescopic cylinder railing system includes an integrated telescopic cylinder railing mechanism and a PLC controller, which is connected to an air supply device.

[0015] The control method for an integrated telescopic cylinder railing system, applied to the integrated telescopic cylinder railing system, includes the following steps: The PLC controller controls the air supply device to supply air to the drive cylinder, the output end of the drive cylinder extends upward, and drives the float, the retracted multi-stage telescopic cylinder and the horizontal railing to rise until the float is level with the ground; The PLC controller controls the air supply device to supply air to the multi-stage telescopic cylinder, the second railing and the third railing extend, thereby lifting the horizontal railing to a preset height.

[0016] The technical solution of this invention has the following advantages: This invention provides an integrated telescopic cylinder railing mechanism, system, and control method, relating to the field of rail transit platform safety protection technology. The integrated telescopic cylinder railing mechanism includes a drive cylinder, a horizontal railing, a float, an air supply device, and several multi-stage telescopic cylinders. The multi-stage telescopic cylinder includes a first railing, a second railing, and a third railing. The lower end of the first railing is installed in an underground trench via a fixed base, and the upper outer wall of the first railing is fixedly connected to the float. The upper end of the third railing is connected to the lower surface of the horizontal railing. The drive cylinder is mounted on the fixed base, and its output end is connected to the lower surface of the float. The output end of the air supply device is connected to both the drive cylinder and the multi-stage telescopic cylinder. In this invention, the multi-stage telescopic cylinder directly adopts a coaxial nested structure design of the first, second, and third railings, which can significantly shorten the retracted length of the multi-stage telescopic cylinder. Therefore, the excavation depth of the deep underground hole is reduced during installation, improving construction efficiency.

[0017] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the means particularly pointed out in the written description and the accompanying drawings.

[0018] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0020] Figure 1 This is a schematic diagram of the overall structure of the integrated telescopic cylinder railing mechanism of the present invention;

[0021] Figure 2 This is a schematic diagram of the multi-stage telescopic cylinder in the retracted state in this invention;

[0022] Figure 3 This is a schematic diagram of the sealing assembly structure in this invention;

[0023] Figure 4 For the present invention Figure 3 Enlarged view of the structure at point A in the middle;

[0024] Figure 5 For the present invention Figure 4 Enlarged view of the structure at point B in the middle;

[0025] Figure 6 For the present invention Figure 5 Enlarged view of the structure at point C.

[0026] In the diagram: 1. Drive cylinder; 2. Horizontal railing; 3. Float; 4. Multi-stage telescopic cylinder; 5. First railing; 6. Second railing; 7. Third railing; 8. Underground tank; 9. Fixing ring; 10. Protective sleeve; 11. Pressure ring; 12. Sealing gap; 13. Sealing sleeve; 14. Sliding hole; 15. Sliding cavity; 16. Piston rod; 17. Piston ring; 18. First spring; 19. First inclined plane; 20. Second inclined plane; 21. Annular liquid storage cavity; 22. Liquid supply pipe; 23. Liquid inlet cavity; 24. Liquid inlet hole; 25. First flow channel; 26. One-way valve; 27. Liquid outlet column; 28. Liquid outlet hole; 29. ​​Second flow channel; 30. Fixing plate; 31. Second spring; 32. Liquid replenishment pipe; 33. Screw cap. Detailed Implementation

[0027] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0028] Furthermore, in this invention, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the invention. They are merely used to distinguish components or operations described using the same technical terms and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions and features of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If a combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0029] Example 1:

[0030] This invention provides an integrated telescopic cylinder railing mechanism, such as... Figures 1-6As shown, it includes: a drive cylinder 1, a horizontal railing 2, a float 3, an air supply device, and several multi-stage telescopic cylinders 4. The multi-stage telescopic cylinders 4 include a first railing 5, a second railing 6, and a third railing 7 arranged coaxially. The lower end of the first railing 5 is installed in the underground trench 8 through a fixed base. The upper outer wall of the first railing 5 is fixedly connected to the float 3. The second railing 6 is slidably installed in the first railing 5. The third railing 7 is slidably installed in the second railing 6. The upper end of the third railing 7 is connected to the lower surface of the horizontal railing 2. The drive cylinder 1 is installed on the fixed base. The output end of the drive cylinder 1 is connected to the lower surface of the float 3. The air supply device is installed in the underground trench 8. The output end of the air supply device is connected to the drive cylinder 1 and the multi-stage telescopic cylinders 4 respectively.

[0031] An integrated telescopic cylinder railing system includes an integrated telescopic cylinder railing mechanism and a PLC controller, which is connected to an air supply device.

[0032] The control method for an integrated telescopic cylinder railing system, applied to the integrated telescopic cylinder railing system, includes the following steps: The PLC controller controls the air supply device to supply air to the drive cylinder 1, the output end of the drive cylinder 1 extends upward, and drives the float 3, the retracted multi-stage telescopic cylinder 4 and the horizontal railing 2 to rise until the float 3 is flush with the ground; The PLC controller controls the air supply device to supply air to the multi-stage telescopic cylinder 4, the second railing 6 and the third railing 7 extend, thereby lifting the horizontal railing 2 to a preset height.

[0033] The working principle and beneficial effects of the above technical solution are as follows: In the non-working state, the integrated telescopic cylinder railing mechanism is hidden within the underground trench 8. The multi-stage telescopic cylinder 4 has a nested cylinder structure. The third railing 7 is housed within the second railing 6, and the second railing 6 is housed within the first railing 5. The multi-stage telescopic cylinder 4 is in a retracted state, with a retracted length of up to 650mm. The horizontal railing 2 remains flush with the ground, not occupying platform surface space. The maximum extended length of the multi-stage telescopic cylinder 4 can reach 1650mm, which can meet the requirements of 0-1200. With a lifting stroke of mm, the overall installation depth of the integrated telescopic cylinder railing mechanism does not exceed 800mm due to the shortened retracted length of the multi-stage telescopic cylinder 4. Compared with the traditional solution that requires additional drilling of holes deeper than 1000mm, this invention significantly shortens the overall retracted length of the railing mechanism by integrating the multi-stage telescopic cylinder 4 with the horizontal railing 2. This reduces the drilling depth of the underground trench 8, reduces the occupation of underground space, reduces the disturbance to soil stability and the risk of damage to lower pipelines caused by deep hole construction, and significantly improves construction efficiency and project safety.

[0034] When the train enters the station and the edge protection needs to be activated, the PLC controller can control the air supply device to supply air to the drive cylinder 1. The output end of the drive cylinder 1 extends upward, driving the float 3, the retracted multi-stage telescopic cylinder 4, and the horizontal railing 2 to rise until the float 3 is level with the ground. Then, the PLC controller controls the air supply device to supply air to the multi-stage telescopic cylinder 4, and the second railing 6 and the third railing 7 extend, thereby lifting the horizontal railing 2 to a preset height, which can be 1200mm, thus achieving the protection function. When the protection needs to be deactivated, the PLC controller controls the air supply device to depressurize, and the multi-stage telescopic cylinder 4 retracts step by step. The third railing 7 first retracts into the second railing 6, and then together they retract into the first railing 5. Subsequently, the drive cylinder 1 retracts, driving the float 3 and the retracted multi-stage telescopic cylinder 4 to retract into the underground trench 8, restoring the hidden state.

[0035] The specific workflow of the integrated telescopic cylinder railing system is as follows:

[0036] Ascent process:

[0037] Step 1: In the initial state, the drive cylinder 1 and the multi-stage telescopic cylinder 4 are fully retracted, the integrated telescopic cylinder railing mechanism does not exceed the ground, the top surface of the horizontal railing 2 is flush with the ground, and it is in a waiting state to rise.

[0038] Step 2: After receiving the door opening command from the PLC controller, the system executes the lifting command. The solenoid valve of the air supply device is activated, thereby supplying air to the drive cylinder 1. The drive cylinder 1 pushes the float 3 up about 20 centimeters, raising the horizontal railing 2 by 20 centimeters. After the drive cylinder 1 and float 3 are in position, the air supply device supplies air to the multi-stage telescopic cylinder 4, which drives the horizontal railing 2 to rise, ultimately reaching the designed height of 1.2 meters. Several pressure sensors are installed on the horizontal railing 2, and the pressure sensors are electrically connected to the PLC controller. If the pressure sensor outputs a signal due to being stepped on during the lifting process, the lifting process will be paused. After waiting for five seconds, it will be determined whether the pressure sensor outputs a signal. The lifting command will continue to be executed only after the pressure sensor no longer outputs a signal.

[0039] Step 3: After the horizontal railing 2 rises to the designed height of 1.2 meters, it maintains the height and waits for the rising action to be completed; the multi-stage telescopic cylinder 4 is equipped with a pressure sensor to detect the cylinder pressure, and can replenish the pressure in time when the air pressure drops;

[0040] The descent process:

[0041] A vacuum valve is installed on the multi-stage telescopic cylinder 4. The vacuum valve is electrically connected to the PLC controller. When the PLC controller issues a command to close the railing, the vacuum valve on the multi-stage telescopic cylinder 4 is activated. The multi-stage telescopic cylinder 4 drives the horizontal railing 2 to descend under the action of negative pressure and gravity. After the horizontal railing 2 contacts the surface of the floating plate 3, the drive cylinder 1 drives the floating plate 3 and the horizontal railing 2 to descend as a whole until the top surface of the horizontal railing 2 is flush with the ground.

[0042] By setting up the floating plate 3, it can be ensured that the floating plate 3 is flush with the ground when the horizontal railing 2 is raised and lowered, so that no groove will appear on the ground, preventing foreign objects or people from falling in and improving safety.

[0043] A first distance sensor is installed on the lower surface of the horizontal railing 2, and is electrically connected to the PLC controller. The first distance sensor detects the distance from the lower surface of the horizontal railing 2 to the upper surface of the floating plate 3. A second distance sensor is installed on the lower surface of the floating plate 3, and is also electrically connected to the PLC controller. The second distance sensor detects the distance from the lower surface of the floating plate 3 to the bottom of the underground trench 8. A first proximity sensor is installed at the starting position of the floating plate 3, located on the inner wall of the underground trench 8, and is electrically connected to the PLC controller. When the floating plate 3 is in the starting position, the first proximity sensor can detect the position of the floating plate 3. A second proximity sensor is installed near the upper side wall of the horizontal railing 2, and is also electrically connected to the PLC controller. When the drive cylinder 1 raises the floating plate 3 from the starting position, the second distance sensor can detect the distance from the lower surface of the floating plate 3 to the bottom of the underground trench 8 in real time, i.e., the rising distance of the floating plate 3. When the rising distance of the floating plate 3 reaches a first preset distance... The PLC controller stops the extension of the drive cylinder 1, thereby precisely controlling the rise of the float 3. Then, the multi-stage telescopic cylinder 4 extends, driving the horizontal railing 2 to move upward. The first distance sensor can detect the distance from the lower surface of the horizontal railing 2 to the upper surface of the float 3 in real time. When the distance detected by the first distance sensor reaches the second preset distance, the PLC controller controls the multi-stage telescopic cylinder 4 to stop extending, so that the horizontal railing 2 maintains its height. During the descent of the horizontal railing 2, when the distance detected by the first distance sensor from the lower surface of the horizontal railing 2 to the upper surface of the float 3 is 0, it means that the horizontal railing 2 is in contact with the float 3. At this time, the PLC controller controls the multi-stage telescopic cylinder 4 to stop moving, and then controls the drive cylinder 1 to retract, and the float 3 moves downward. When the float 3 reaches the starting position, the first proximity sensor detects the float 3, and at the same time, the second proximity sensor can detect the ground. The PLC controller then controls the drive cylinder 1 to stop working. At this time, the top surface of the horizontal railing 2 is flush with the ground.

[0044] An anti-pinch sensor is installed on the horizontal railing 2, and the anti-pinch sensor is electrically connected to the PLC controller. A vacuum breaker valve is installed on the multi-stage telescopic cylinder 4, and the vacuum breaker valve is electrically connected to the PLC controller. During the descent of the horizontal railing 2, if the anti-pinch sensor is triggered, the PLC controller controls the vacuum breaker valve to start and simultaneously controls the air supply device to supply air to the multi-stage telescopic cylinder 4. The multi-stage telescopic cylinder 4 changes from the downward retracted state to the upward extended state, so that the horizontal railing 2 rises a preset safe distance. When the anti-pinch sensor is not triggered, the PLC controller controls the vacuum breaker valve and the air supply device to stop working, the vacuum valve opens, and the multi-stage telescopic cylinder 4 changes from the upward extended state to the downward retracted state again, and drives the horizontal railing 2 to retract downward until the top surface of the horizontal railing 2 is flush with the ground.

[0045] The integrated telescopic cylinder railing system also includes an audible and visual alarm device, which is installed on the horizontal railing 2 and electrically connected to the PLC controller. During the ascent of the horizontal railing 2, the alarm flashes and emits an alarm sound until the railing 2 reaches the designed height, at which point the alarm automatically stops. During the descent of the horizontal railing 2, the alarm flashes and emits a descent alarm sound until the railing 2 is level with the ground. When a system malfunction occurs, such as the drive cylinder 1 or the multi-stage telescopic cylinder 4 failing to rise or fall normally, or the distance sensor or proximity sensor failing to provide feedback, the alarm flashes and emits an malfunction alarm sound, alerting on-site maintenance personnel to address the issue promptly until the system returns to normal, thus enhancing system safety.

[0046] Example 2:

[0047] Based on the above embodiment 1, as follows Figures 3-6 As shown, a sealing assembly is provided between the third railing 7 and the second railing 6. The sealing assembly includes a fixing ring 9 and a protective sleeve 10. The fixing ring 9 is located on the outer periphery of the upper end of the third railing 7. A pressing ring 11 is provided at the bottom of the fixing ring 9. The protective sleeve 10 is sleeved on the outside of the third railing 7. The lower end of the protective sleeve 10 is connected to the upper surface of the second railing 6.

[0048] A sealing gap 12 is provided between the lower pressure ring 11 and the outer wall of the third railing 7. A sealing sleeve 13 is fitted on the outside of the third railing 7. The lower end of the sealing sleeve 13 is connected to the upper end of the protective sleeve 10. The sealing sleeve 13 is adapted to the sealing gap 12.

[0049] The working principle and beneficial effects of the above technical solution are as follows: A sealing component is set between the third railing 7 and the second railing 6. Similarly, a sealing component can also be set between the second railing 6 and the first railing 5, which will not be elaborated here. Taking the sealing component set between the third railing 7 and the second railing 6 as an example, the sealing component includes a fixing ring 9 and a protective sleeve 10. When the multi-stage telescopic cylinder 4 retracts, the third railing 7 slides downward inside the second railing 6. The third railing 7 drives the upper fixing ring 9 to move downward. The fixing ring 9 drives the lower pressure ring 11 to move towards the second railing 6 until the lower end of the fixing ring 9 contacts the upper end of the protective sleeve 10 and can no longer move downward. At this time, a sealing space can be formed by the contact between the lower pressure ring 11 and the protective sleeve 10, thereby preventing external dust from entering the gap between the third railing 7 and the second railing 6, extending the service life of the multi-stage telescopic cylinder 4. In addition, the sealing sleeve 13 can slide into the sealing gap 12 to further improve the sealing effect.

[0050] Example 3:

[0051] Based on Example 2, such as Figures 3-6 As shown, the protective sleeve 10 is provided with a plurality of sliding holes 14, which are arranged in a circular array about the central axis of the protective sleeve 10. A sliding cavity 15 is provided near the lower outer side of the sliding hole 14. The sliding cavity 15 is located inside the protective sleeve 10 and communicates with the sliding hole 14. A piston rod 16 is slidably arranged inside the sliding hole 14. A piston ring 17 is provided outside the piston rod 16. The piston rod 16 is slidably connected to the inner wall of the sliding cavity 15. A first spring 18 is sleeved outside the piston rod 16. The upper end of the first spring 18 is connected to the lower surface of the piston ring 17, and the lower end of the first spring 18 is connected to the bottom wall of the sliding cavity 15. A first inclined surface 19 is provided at the upper end of the piston rod 16. The height of the piston rod 16 near the third railing 7 is higher than the height of the piston rod 16 away from the third railing 7. A second inclined surface 20 adapted to the first inclined surface 19 is provided at the bottom of the lower pressure ring 11.

[0052] An annular liquid storage chamber 21 is provided inside the protective sleeve 10. The annular liquid storage chamber 21 is located below the sliding hole 14. The annular liquid storage chamber 21 is connected to the interior of the sliding cavity 15 through the liquid supply pipe 22. A liquid inlet chamber 23 is provided near the lower end of the piston rod 16. A liquid inlet hole 24 is provided on the side wall of the piston rod 16. The liquid inlet chamber 23 is connected to the sliding cavity 15 through the liquid inlet hole 24. The diameter of the liquid inlet hole 24 is larger than the diameter of the liquid supply pipe 22. A first flow channel 25 is vertically provided inside the piston rod 16. One end of the first flow channel 25 is connected to the liquid inlet chamber 23. The other end of the first flow channel 25 passes through the upper end of the piston rod 16. A one-way valve 26 is provided at the lower end of the first flow channel 25.

[0053] A liquid outlet column 27 is slidably arranged inside the first flow channel 25. Several liquid outlet holes 28 are provided on the upper side wall of the liquid outlet column 27. A second flow channel 29 is vertically arranged inside the liquid outlet column 27. The lower end of the second flow channel 29 is connected to the first flow channel 25, and the upper end of the second flow channel 29 is connected to the liquid outlet holes 28. A fixing plate 30 is provided below the liquid outlet column 27. One end of the fixing plate 30 is connected to the inner wall of the first flow channel 25. The fixing plate 30 and the liquid outlet column 27 are connected by a second spring 31.

[0054] The working principle and beneficial effects of the above technical solution are as follows: Cleaning fluid is stored in the annular storage chamber 21. Initially, cleaning fluid is provided in the sliding chamber 15, the inlet chamber 23, and the first flow channel 25. When the multi-stage telescopic cylinder 4 retracts, the lower pressure ring 11 contacts the upper end of the outlet column 27 through the second inclined surface 20. The upper end of the outlet column 27 is hemispherical, which can reduce the contact area between the outlet column 27 and the second inclined surface 20. As the lower pressure ring 11 moves downward, it drives the outlet column 27 downward in the first flow channel 25. The sliding liquid column 27 squeezes the cleaning fluid in the first flow channel 25, causing it to flow into the second flow channel 29 and quickly flow out through the liquid outlet 28. The cleaning fluid flowing out through the liquid outlet 28 can clean the surfaces of the protective sleeve 10 and the piston rod 16, preventing impurities from remaining on the surfaces of the protective sleeve 10 and the piston rod 16 and affecting the sealing effect. When there are few impurities on the surface of the piston rod 16, a small amount of cleaning fluid sprayed through the liquid outlet 28 can complete the cleaning of the surface of the piston rod 16. After cleaning, the lower pressure ring... As the piston ring 11 moves downwards, it completely presses the liquid column 27 into the first flow channel 25. The liquid outlet 28 is blocked by the inner wall of the first flow channel 25, and the cleaning fluid stops flowing out. The second inclined surface 20 of the piston ring 11 contacts the first inclined surface 19 at the upper end of the piston rod 16. The piston ring 11 continues to move downwards and drives the piston rod 16 to slide downwards in the sliding hole 14. The piston rod 16 drives the piston ring 17 to slide in the sliding cavity 15. Since the cleaning fluid cannot be sprayed out of the liquid outlet 28, a small portion of the cleaning fluid in the sliding cavity 15 remains. The cleaning fluid flows into the inlet chamber 23 through the inlet hole 24, while most of the cleaning fluid in the sliding chamber 15 flows back to the annular storage chamber 21 through the supply pipe 22. When the multi-stage telescopic cylinder 4 extends, the lower pressure ring 11 separates from the upper end of the piston rod 16. Under the action of the first spring 18, the piston ring 17 slides upward along the inner wall of the sliding chamber 15, and the cleaning fluid in the annular storage chamber 21 flows into the sliding chamber 15 through the supply pipe 22 for later use. Under the elastic force of the second spring 31, the upper end of the outlet column 27 slides to the outside of the first flow channel 25.When there are many impurities on the surface of the piston rod 16, the pressure ring 11 cannot contact the upper end of the piston rod 16 during the downward pressing process. Therefore, the cleaning fluid can still be quickly sprayed out from the outlet hole 28. The pressure ring 11 contacts the impurities on the surface of the piston rod 16 and pushes the piston rod 16 to slide downward. The piston rod 16 drives the piston ring 17 to slide downward in the sliding cavity 15. Since the diameter of the inlet hole 24 is larger than the diameter of the supply pipe 22, most of the cleaning fluid in the sliding cavity 15 can quickly flow into the inlet cavity 23, and then flow into the first flow channel 25 through the one-way valve 26, and quickly pass through... The liquid flows through the second flow channel 29 to the outlet hole 28, and finally sprays out rapidly from the outlet hole 28. The outlet hole 28 can spray out a large amount of cleaning liquid, which improves the cleaning effect on the surface of the piston rod 16 and helps to remove more impurities from the surface of the piston rod 16. In addition, the second inclined surface 20 of the lower pressure ring 11 and the first inclined surface 19 at the upper end of the piston rod 16 form a small gap. The sprayed cleaning liquid can flow rapidly downward in the small gap, avoiding random spraying of the cleaning liquid, further improving the cleaning effect, ensuring the sealing effect of the sealing assembly, and extending the service life of the multi-stage telescopic cylinder 4.

[0055] Example 4:

[0056] Based on Example 3, such as Figure 5 As shown, a liquid replenishment tube 32 is provided on the side wall of the protective sleeve 10, and one end of the liquid replenishment tube 32 is connected to the inside of the annular liquid storage cavity 21;

[0057] A screw cap 33 is provided at the end of the replenishment tube 32 away from the protective sleeve 10.

[0058] The working principle and beneficial effects of the above technical solution are as follows: After opening the screw cap 33, cleaning fluid can be added to the annular liquid storage chamber 21 through the replenishment tube 32. The process of replenishing cleaning fluid is convenient and quick, which greatly reduces the difficulty of maintenance.

[0059] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0060] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0061] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. Other modifications can be easily made by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. An integrated telescopic cylinder railing mechanism, characterized in that, include: The system includes a drive cylinder (1), a horizontal railing (2), a float (3), an air supply device, and several multi-stage telescopic cylinders (4). The multi-stage telescopic cylinder (4) includes a first railing (5), a second railing (6), and a third railing (7) arranged coaxially. The lower end of the first railing (5) is installed in the underground trench (8) through a fixed base. The upper outer wall of the first railing (5) is fixedly connected to the float (3). The second railing (6) is slidably arranged in the first railing (5). The third railing (7) is slidably arranged in the second railing (6). The upper end of the third railing (7) is connected to the lower surface of the horizontal railing (2). The drive cylinder (1) is set on the fixed base. The output end of the drive cylinder (1) is connected to the lower surface of the float (3). The air supply device is set in the underground trench (8). The output end of the air supply device is connected to the drive cylinder (1) and the multi-stage telescopic cylinder (4) respectively. A sealing assembly is provided between the third railing (7) and the second railing (6). The sealing assembly includes a fixing ring (9) and a protective sleeve (10). The fixing ring (9) is located on the outer periphery of the upper end of the third railing (7). A pressure ring (11) is provided at the bottom of the fixing ring (9). The protective sleeve (10) is fitted on the outside of the third railing (7). The lower end of the protective sleeve (10) is connected to the upper surface of the second railing (6). A plurality of sliding holes (14) are provided inside the protective sleeve (10). The plurality of sliding holes (14) are arranged in a ring array about the central axis of the protective sleeve (10). A sliding cavity (15) is provided near the lower outer side of the sliding hole (14). The sliding cavity (15) is located inside the protective sleeve (10). The inner side of the sliding cavity (15) communicates with the sliding hole (14). A piston rod (16) is slidably installed inside the sliding hole (14). A piston ring (17) is provided outside the piston rod (16). The piston rod (16) and the inner wall of the sliding cavity (15) are aligned vertically. The piston rod (16) is fitted with a first spring (18). The upper end of the first spring (18) is connected to the lower surface of the piston ring (17), and the lower end of the first spring (18) is connected to the bottom wall of the sliding cavity (15). The upper end of the piston rod (16) is provided with a first inclined surface (19). The height of the piston rod (16) near the third railing (7) is higher than the height of the piston rod (16) away from the third railing (7). The bottom of the lower pressure ring (11) is provided with a second inclined surface (20) that matches the first inclined surface (19).

2. The integrated telescopic cylinder railing mechanism according to claim 1, characterized in that, A sealing gap (12) is provided between the lower pressure ring (11) and the outer wall of the third railing (7). A sealing sleeve (13) is fitted on the outside of the third railing (7). The lower end of the sealing sleeve (13) is connected to the upper end of the protective sleeve (10). The sealing sleeve (13) is compatible with the sealing gap (12).

3. The integrated telescopic cylinder railing mechanism according to claim 1, characterized in that, An annular liquid storage chamber (21) is provided inside the protective sleeve (10). The annular liquid storage chamber (21) is located below the sliding hole (14). The annular liquid storage chamber (21) is connected to the sliding cavity (15) through the liquid supply pipe (22). An inlet chamber (23) is provided near the lower end of the piston rod (16). An inlet hole (24) is provided on the side wall of the piston rod (16). The inlet chamber (23) is connected to the sliding cavity (15) through the inlet hole (24). The diameter of the inlet hole (24) is larger than the diameter of the liquid supply pipe (22). A first flow channel (25) is vertically provided inside the piston rod (16). One end of the first flow channel (25) is connected to the inlet chamber (23). The other end of the first flow channel (25) passes through the upper end of the piston rod (16). A one-way valve (26) is provided at the lower end of the first flow channel (25).

4. The integrated telescopic cylinder railing mechanism according to claim 3, characterized in that, The first flow channel (25) is equipped with a liquid outlet column (27) that slides up and down. The upper side wall of the liquid outlet column (27) is provided with several liquid outlet holes (28). The liquid outlet column (27) is equipped with a second flow channel (29) that is vertically arranged inside the liquid outlet column (27). The lower end of the second flow channel (29) is connected to the first flow channel (25), and the upper end of the second flow channel (29) is connected to the liquid outlet holes (28). A fixing plate (30) is provided below the liquid outlet column (27). One end of the fixing plate (30) is connected to the inner wall of the first flow channel (25), and the fixing plate (30) and the liquid outlet column (27) are connected by a second spring (31).

5. The integrated telescopic cylinder railing mechanism according to claim 3, characterized in that, A liquid replenishment tube (32) is provided on the side wall of the protective sleeve (10), and one end of the liquid replenishment tube (32) is connected to the inside of the annular liquid storage cavity (21).

6. The integrated telescopic cylinder railing mechanism according to claim 5, characterized in that, A screw cap (33) is provided at the end of the replenishment tube (32) away from the protective sleeve (10).

7. An integrated telescopic cylinder railing system, characterized in that, The integrated telescopic cylinder railing mechanism as described in any one of claims 1-6 further includes a PLC controller, which is connected to the air supply device.

8. A control method for an integrated telescopic cylinder railing system, applied to the integrated telescopic cylinder railing system as described in claim 7, characterized in that, Includes the following steps: The PLC controller controls the air supply device to supply air to the drive cylinder (1). The output end of the drive cylinder (1) extends upward and drives the float (3), the retracted multi-stage telescopic cylinder (4) and the horizontal railing (2) to rise until the float (3) is level with the ground. The PLC controller controls the air supply device to supply air to the multi-stage telescopic cylinder (4). The second railing (6) and the third railing (7) extend, thereby lifting the horizontal railing (2) to the preset height.

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