Reinforcing and supporting device for engineering pile underpinning structure

Abstract

The invention relates to the related technical field of supporting devices, and discloses a reinforcing and supporting device for an engineering pile underpinning structure, which comprises a hydraulic oil cylinder and a three-stage oil cylinder assembly, the three-stage oil cylinder assembly comprises a first-stage telescopic cylinder, a second-stage telescopic cylinder, a top block and a hydraulic damping control device, the hydraulic damping control device is connected with the three-stage oil cylinder assembly and used for controlling the liquid inlet flow and providing hydraulic damping when the oil cylinder falls down. A hydraulic damping control device comprising a proportional flow valve and a damper is connected with a third-stage oil cylinder assembly composed of a first-stage telescopic cylinder, a second-stage telescopic cylinder and an ejector block which are sequentially linked. The proportional flow valve accurately regulates and controls the air inlet loop, so that the oil cylinders of all levels extend out stably in sequence, the problem that the oil cylinders are not synchronous is solved, overall stress uniformity is guaranteed, supporting stability is improved, the proportional flow valve accurately regulates and controls the air inlet loop, the oil cylinders of all levels extend out stably in sequence, and the problem that the oil cylinders are not synchronous is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field related to support devices, and more specifically, particularly relates to a reinforcement support device for an engineering pile underpinning structure. Background Art

[0002] In construction engineering, engineering pile underpinning operations are a common and important task. Many problems have emerged in the actual use of traditional engineering pile support devices. For example, the control accuracy of the oil cylinder is insufficient, making it difficult to achieve smooth and orderly telescoping. In complex working conditions, safety accidents such as the oil cylinder falling are likely to occur, seriously threatening project safety. However, the support devices in the prior art have the following defects: In the prior art, in the scenario of engineering pile underpinning operations, traditional single-stage oil cylinders undertake key support and power transmission tasks. However, their structural characteristics determine that there are significant hidden dangers when facing the problem of internal pressure leakage. A single-stage oil cylinder has only a single working chamber. When the internal sealing components are worn due to long-term high-intensity operations or the seals fail due to external impacts, internal pressure leakage will occur immediately; In the prior art, the internal structure of a single-stage oil cylinder is simple and only relies on limited sealing and support structures to maintain normal operation. Once the sealing components are damaged, the hydraulic oil quickly leaks out, and it is unable to continuously provide a stable supporting force for the oil cylinder. Under the action of gravity, the oil cylinder will rapidly fall. At the same time, a single power and control circuit is unable to effectively maintain control of the oil cylinder in the face of sudden failures such as circuit short circuits and hydraulic pump failures, resulting in the out-of-control fall of the oil cylinder; In the prior art, in engineering pile underpinning operations, when the oil cylinder faces an emergency situation of rapid falling, if the hydraulic system fails simultaneously, it will undoubtedly make the situation extremely difficult. Engineering pile underpinning operations have extremely high requirements for stability. As the core support component, once the oil cylinder rapidly falls, the force balance of the entire pile body will be instantly broken. The pile body may tilt, displace, or even collapse due to the sudden loss of the supporting force, which will not only cause devastating damage to the completed part of the project, resulting in a waste of a large amount of human, material, and time costs, but also pose a serious threat to the safety of surrounding building facilities and on-site construction personnel.

[0003] Therefore, in view of this, research and improvement are carried out on the existing structure and deficiencies, and a reinforcement support device for an engineering pile underpinning structure is provided, in order to achieve a more practical and valuable purpose. Summary of the Invention

[0004] The present invention provides a reinforcement support device for an engineering pile underpinning structure to overcome the above defects in the prior art.

[0005] The purpose and efficacy of a reinforcement support device for an engineering pile underpinning structure according to the present invention are achieved by the following specific technical means: A reinforcement and support device for an engineering pile underpinning structure, comprising a hydraulic cylinder, the hydraulic cylinder including a three-stage cylinder assembly, the three-stage cylinder assembly including a first-stage telescopic cylinder, a second-stage telescopic cylinder and a top block that are sequentially linked; A hydraulic damping control device, which is connected to the three-stage cylinder assembly and is used to control the liquid inlet flow rate and provide hydraulic damping when the cylinder falls; A mechanical locking structure, which is arranged between the piston and the cylinder body of each stage of the cylinder. The mechanical locking structure includes a first-stage locking assembly and a second-stage locking assembly fixedly installed between the three-stage cylinder assembly and the hydraulic damping control device. The first-stage locking assembly and the second-stage locking assembly can prevent the accidental sliding of the cylinder piston, keep its telescopic position stable, and provide a reliable supporting force for the engineering pile underpinning structure; An emergency braking linkage system, including a sensor and an electromagnetic braking device. The sensor is used to monitor the state of the cylinder, and the electromagnetic braking device is used to execute braking after receiving the sensor signal.

[0006] A further technical solution, the hydraulic cylinder includes an outer housing, a sealed protection cavity is arranged inside the outer housing, an inner barrel is installed in the sealed protection cavity, a liquid pipe connection assembly is arranged between the outer housing and the inner barrel, a hydraulic damping control device is annularly arranged inside the inner barrel, a three-stage cylinder assembly is installed inside the hydraulic damping control device, a pressure relief valve is arranged at the bottom of the outer housing, and the pressure relief valve is communicated with the sealed protection cavity.

[0007] A further technical solution, the three-stage cylinder assembly includes a U-shaped body, a middle partition is arranged inside the U-shaped body, the middle partition divides the U-shaped body into a first-stage telescopic cylinder and a second-stage telescopic cylinder, a first-stage hydraulic cavity is arranged between the first-stage telescopic cylinder and the bottom wall of the U-shaped body, a second-stage hydraulic cavity is arranged between the second-stage telescopic cylinder and the middle partition, a top block is fixedly connected to the top of the second-stage telescopic cylinder, a jacking table board slides inside the top block, one end of the jacking table board is provided with a piston board, the piston board slides inside the top block, a middle air pipe is connected between the first-stage hydraulic cavity and the second-stage hydraulic cavity, and a liquid pipe is also connected between the second-stage telescopic cylinder and the top block.

[0008] A further technical solution, a first-stage locking assembly is fixedly installed on the outer side of the first-stage telescopic cylinder. The first-stage locking assembly includes a first-stage side wall, an inner cavity is arranged inside the first-stage side wall, a first-stage limiting groove is fixedly installed on the inner wall of the cavity, a multi-stage limiting groove is arranged on the side wall of the first-stage limiting groove, a first-stage outer extending plate slides inside the limiting groove, a first-stage emergency locking device is fixedly installed on the first-stage outer extending plate, and the other end of the first-stage outer extending plate is fixedly connected to the outer wall of the first-stage telescopic cylinder.

[0009] Further technical solution: A secondary locking assembly is fixedly connected to the outside of the secondary telescopic cylinder. The secondary locking assembly includes a secondary side wall. A cavity is provided inside the secondary side wall. A secondary limiting groove is fixedly installed on the inner wall of the cavity. A secondary outer extension plate is slidably arranged in the secondary limiting groove. A secondary emergency locking device is fixedly installed above the secondary outer extension plate. One end of the secondary outer extension plate is fixedly connected to the outer wall of the secondary telescopic cylinder.

[0010] Further technical solution: The liquid pipe connection assembly includes a liquid inlet pipe. A liquid inlet valve interface is fixedly connected to the liquid inlet end of the liquid inlet pipe. The liquid outlet end of the liquid inlet pipe communicates with the inside of the primary hydraulic chamber. An auxiliary safety air pipe is fixedly installed above the liquid inlet pipe. The liquid discharge end of the auxiliary safety air pipe communicates with the inside of the hydraulic damping control device. The hydraulic damping control device communicates with the inside of the secondary hydraulic chamber and the primary hydraulic chamber.

[0011] Further technical solution: The hydraulic damping control device includes a proportional flow valve and a damper. The proportional flow valve is arranged in the air inlet circuit and is used to control the sequential air inlet of each stage of the cylinder. The damper is used to increase the gas return resistance when the cylinder falls.

[0012] Further technical solution: The primary emergency locking device has the same structure as the secondary emergency locking device. The secondary emergency locking device includes a device housing. A second locking assembly and a first locking assembly are symmetrically installed inside the device housing. The first locking assembly is arranged on the right side of the second locking assembly. The second locking assembly includes a U-shaped partition. The U-shaped partition is arranged at one end of the device housing. An extrusion cavity is provided between the U-shaped partition and the inner wall of the device housing. A return spring is fixedly installed in the extrusion cavity. The U-shaped partition slides inside the device housing. An opening is provided on the bottom wall of the U-shaped partition. A fixing plate is vertically slidably arranged inside the U-shaped partition. A locking rod is hinged above the fixing plate. The end of the locking rod penetrates through the device housing. The locking rod is hinged to the device housing. The end of the locking rod is a barb, and the barb cooperates with the secondary limiting groove. A micro air pump is fixedly installed at the bottom of the device housing. Exhaust ports are provided on both sides of the micro air pump. Air pipes are connected to both sides of the micro air pump, and the air pipes are connected to the exhaust ports.

[0013] Further technical solution: A heightening platform pad is fixedly installed at the bottom of the hydraulic cylinder. An inclined platform bracket is fixedly installed at the bottom of the heightening platform pad. A support tabletop is fixedly installed at the upper end of the inclined platform bracket. A round hole is provided in the middle of the support tabletop, and the round hole is used for the jacking platform plate to extend out.

[0014] Further technical solution: The emergency braking linkage system further includes a controller. The sensors further include a pressure sensor and a displacement sensor. The pressure sensor and the displacement sensor are electrically connected to the controller. The controller is built with a threshold judgment logic for receiving sensor data and sending braking instructions to the electromagnetic braking device. The controller is built with a timing control algorithm. The algorithm generates adjustment parameters for the pneumatic proportional flow valve according to the data of the pressure sensor and the displacement sensor, ensuring that the liquid inlet sequence of the three-stage oil cylinder assembly accurately operates in the order of "primary telescopic cylinder → secondary telescopic cylinder → top block".

[0015] Compared with the prior art, the present invention has the following beneficial effects: The reinforcement support device for an engineering pile underpinning structure of the present invention is provided with a three-stage oil cylinder assembly, which is composed of a primary telescopic cylinder, a secondary telescopic cylinder, and a top block that are sequentially linked. Compared with traditional single-stage oil cylinders, the three-stage oil cylinder assembly has unique advantages. In terms of pressure distribution, it cleverly disperses the pressure among multiple levels of oil cylinders. During actual operation, when there is an internal pressure leakage, the leakage will not concentrate in a certain place. For example, if there is a leakage in the primary hydraulic chamber, since each level of oil cylinder works independently and cooperatively, the pressure will not continuously accumulate and quickly release in the primary telescopic cylinder. Instead, part of the pressure will be shared by the secondary telescopic cylinder and the top block. This mode of dispersed leakage greatly reduces the risk of rapid pressure relief, thereby effectively reducing the probability of safety accidents caused by rapid pressure relief, providing a more reliable and safer support guarantee for the engineering pile underpinning operation. The reinforcement support device for an engineering pile underpinning structure of the present invention is provided with a hydraulic damping control device including a proportional flow valve and a damper. The hydraulic damping control device is connected to the three-stage oil cylinder assembly composed of a primary telescopic cylinder, a secondary telescopic cylinder, and a top block that are sequentially linked. The proportional flow valve precisely regulates the intake air circuit, enabling each level of oil cylinder to extend smoothly in sequence, solving the problem of oil cylinder non-synchronization, ensuring uniform overall force, and improving support stability. When there is a risk of the oil cylinder falling in case of sudden situations, the damper quickly increases the gas return resistance, slows down the falling speed, effectively prevents the instantaneous loss of support force, and guarantees project safety.

[0016] The reinforcement support device for the engineering pile underpinning structure of the present invention is provided with a mechanical locking structure. When the oil cylinder faces abnormal situations, such as a sudden drop in the pressure of the hydraulic system and a tendency to fall, the mechanical locking structure can respond quickly. The primary locking assembly and the secondary locking assembly disposed between the piston and the cylinder body of each stage of the oil cylinder can immediately lock the oil cylinder through a special mechanical structure, such as the cooperation between the locking rod and the limit groove in the primary emergency locking device and the secondary emergency locking device, effectively preventing it from continuing to fall. At the same time, the hydraulic damping control device increases the gas reflux resistance when the oil cylinder falls, slowing down the falling speed. The two complement each other and jointly constitute a multiple safety protection system. In actual engineering construction, this system greatly reduces the possibility of safety accidents caused by the out-of-control of the oil cylinder, provides a solid and reliable safety guarantee for the smooth progress of the engineering construction, and enables the engineering personnel to efficiently carry out the pile underpinning operation in a safe environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] The present invention will be further described below in conjunction with the drawings and embodiments.

[0019] Figure 1 It is a schematic diagram of the overall external structure of the present invention; Figure 2 It is a schematic diagram of the overall top view structure of the present invention; Figure 3 It is a schematic diagram of the overall side view structure of the present invention; Figure 4 It is a schematic diagram of the overall side sectional structure of the hydraulic oil cylinder in the present invention; Figure 5 For the present invention Figure 4 It is a schematic diagram of the semi-sectional structure; Figure 6 It is a schematic diagram of the overall sectional structure of the three-stage oil cylinder assembly in the present invention; Figure 7 It is a schematic diagram of the sectional structure of the liquid pipe connection assembly and the hydraulic damping control device in the present invention; Figure 8 For the present invention Figure 6 It is a schematic diagram of the enlarged structure at A in the present invention; Figure 9 For the present invention Figure 6 It is a schematic diagram of the enlarged structure at B in the present invention; Figure 10 For the present inventionFigure 9 Schematic enlarged structure diagram of the secondary emergency locking device.

[0020] Description of reference numerals: Inclined platform bracket 11, heightening platform pad 12, hydraulic cylinder 13, outer housing 14, liquid inlet valve interface 15, liquid inlet pipe 16, auxiliary safety air pipe 17, inner barrel 18, hydraulic damping control device 19, primary locking assembly 20, secondary locking assembly 21, tertiary cylinder assembly 22, jacking platform plate 23, primary hydraulic chamber 24, primary telescopic cylinder 25, middle air pipe 26, secondary hydraulic chamber 27, secondary telescopic cylinder 28, top block 29, primary side wall 30, primary limit groove 31, primary outer extension plate 32, primary emergency locking device 33, secondary side wall 34, secondary outer extension plate 35, secondary limit groove 36, secondary emergency locking device 37, device housing 38, locking rod 39, U-shaped partition 40, extrusion chamber 41, return spring 42, fixing plate 43, exhaust port 44, air pipe 45, micro air pump 46, first locking assembly 47, support table top 48, second locking assembly 49. Specific implementation manners

[0021] The following further describes in detail the implementation manners of the present invention in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0022] In the description of the present invention, unless otherwise specified, "a plurality of" means two or more; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0024] As shown in the attached Figure 1 to the attached Figure 10 figures: The present invention provides a reinforcement support device for an engineering pile underpinning structure, including a hydraulic cylinder 13. The hydraulic cylinder 13 includes a three-stage cylinder assembly 22, and the three-stage cylinder assembly 22 includes a first-stage telescopic cylinder 25, a second-stage telescopic cylinder 28, and a top block 29 that are linked in sequence; A hydraulic damping control device 19 is connected to the three-stage cylinder assembly 22 and is used to control the liquid inlet flow rate and provide hydraulic damping when the cylinder falls; A mechanical locking structure is arranged between the piston and the cylinder body of each stage of the cylinder. The mechanical locking structure includes a first-stage locking assembly 20 and a second-stage locking assembly 21 fixedly installed between the three-stage cylinder assembly 22 and the hydraulic damping control device 19. The first-stage locking assembly 20 and the second-stage locking assembly 21 can prevent the accidental sliding of the cylinder piston, keep its telescopic position stable, and provide a reliable supporting force for the engineering pile underpinning structure; An emergency braking linkage system includes a sensor and an electromagnetic braking device. The sensor is used to monitor the state of the cylinder, and the electromagnetic braking device is used to execute braking after receiving the sensor signal.

[0025] The three-stage cylinder assembly realizes multi-stage telescoping, can flexibly adjust the jacking height and supporting force according to engineering requirements. The hydraulic damping control device controls the liquid inlet flow rate to ensure accurate cylinder operation, provides damping when falling to enhance safety. The mechanical locking structure prevents the accidental sliding of the cylinder piston and maintains a stable supporting position. The emergency braking linkage system monitors the state of the cylinder in real time, quickly brakes in case of abnormalities, and comprehensively ensures the safe and stable operation of the device, meeting the complex operation requirements of the engineering pile underpinning.

[0026] Preferably, referring to the attached Figure 4 and the attached Figure 5 , the hydraulic cylinder 13 includes an outer housing 14. There is a sealed protection cavity inside the outer housing 14. An inner barrel 18 is installed in the sealed protection cavity. A liquid pipe connection assembly is arranged between the outer housing 14 and the inner barrel 18. The hydraulic damping control device 19 is annularly arranged inside the inner barrel 18. The three-stage cylinder assembly 22 is installed inside the hydraulic damping control device 19. A pressure relief valve is arranged at the bottom of the outer housing 14, and the pressure relief valve is communicated with the sealed protection cavity.

[0027] The outer housing and the inner barrel form a double-layer structure, providing protection and installation space for internal components. The liquid pipe connection component is responsible for the transmission of hydraulic oil to ensure the coordinated operation of each component. The hydraulic damping control device is annularly arranged inside the inner barrel, facilitating connection with the three-stage cylinder component and playing a control role. The overall compact layout improves the integration and stability of the device. Moreover, a pressure relief valve communicating with the airtight protection chamber is provided at the bottom of the outer housing 14. During the operation of the hydraulic cylinder, when the pressure in the airtight protection chamber is too high, the excess gas can be discharged by opening the pressure relief valve, preventing damage to the internal structure of the cylinder due to excessive pressure, protecting the hydraulic cylinder 13, and also contributing to maintaining the normal operation of the entire hydraulic system and ensuring its working safety and reliability.

[0028] Preferably, referring to the attached Figure 6 , the three-stage cylinder component 22 includes a U-shaped body. A middle partition is provided inside the U-shaped body, which divides the U-shaped body into a first-stage telescopic cylinder 25 and a second-stage telescopic cylinder 28. A first-stage hydraulic chamber 24 is provided between the first-stage telescopic cylinder 25 and the bottom wall of the U-shaped body. A second-stage hydraulic chamber 27 is provided between the second-stage telescopic cylinder 28 and the middle partition. A top block 29 is fixedly connected to the top of the second-stage telescopic cylinder 28. A jacking table plate 23 slides inside the top block 29. One end of the jacking table plate 23 is provided with a piston plate, which slides inside the top block 29. A middle air pipe 26 is connected between the first-stage hydraulic chamber 24 and the second-stage hydraulic chamber 27. A liquid pipe is also connected between the second-stage telescopic cylinder 28 and the top block 29.

[0029] The middle partition divides different hydraulic chambers. The first-stage and second-stage telescopic cylinders and the top block are driven by the inflow and outflow of hydraulic oil in each chamber to achieve multi-stage telescoping. The middle air pipe balances the pressures in different hydraulic chambers to ensure a smooth telescoping process. The jacking table plate slides inside the top block and finally transmits the jacking force to the engineering pile replacement structure, precisely controlling the support height and strength.

[0030] Preferably, referring to the attached Figure 6 and the attached Figure 8 , a first-stage locking component 20 is fixedly installed on the outer side of the first-stage telescopic cylinder 25. The first-stage locking component 20 includes a first-stage side wall 30. There is an inner cavity inside the first-stage side wall 30. A first-stage limit groove 31 is fixedly installed on the inner wall of the cavity. Multiple limit grooves are provided on the side wall of the first-stage limit groove 31. A first-stage outer extension plate 32 slides inside the limit groove. A first-stage emergency locking device 33 is fixedly installed on the first-stage outer extension plate 32. The other end of the first-stage outer extension plate 32 is fixedly connected to the outer wall of the first-stage telescopic cylinder 25.

[0031] The first-level outer extension plate moves with the first-level telescopic cylinder and slides within the first-level limit slot. When locking is required, the first-level emergency locking device is activated, and its locking structure cooperates with the multi-level limit slot to prevent the first-level outer extension plate from sliding, thereby locking the position of the first-level telescopic cylinder and preventing accidental telescoping caused by hydraulic abnormalities, etc., to ensure the stability of the support.

[0032] Preferably, referring to the attached Figure 6 and the attached Figure 8 , a second-level locking assembly 21 is fixedly connected to the outside of the second-level telescopic cylinder 28. The second-level locking assembly 21 includes a second-level side wall 34. A cavity is provided inside the second-level side wall 34. A second-level limit slot 36 is fixedly installed on the inner wall of the cavity. A second-level outer extension plate 35 slides within the second-level limit slot 36. A second-level emergency locking device 37 is fixedly installed above the second-level outer extension plate 35. One end of the second-level outer extension plate 35 is fixedly connected to the outer wall of the second-level telescopic cylinder 28.

[0033] Similar to the first-level locking assembly, the second-level outer extension plate moves with the second-level telescopic cylinder and slides within the second-level limit slot. When the second-level emergency locking device is triggered, its locking structure cooperates with the second-level limit slot to lock the position of the second-level telescopic cylinder, providing reliable locking for the second-level oil cylinder, preventing accidental sliding, and enhancing the overall support reliability.

[0034] Preferably, referring to the attached Figure 5 , the liquid pipe connection assembly includes a liquid inlet pipe 16. A liquid inlet valve interface 15 is fixedly connected to the liquid inlet end of the liquid inlet pipe 16. The liquid outlet end of the liquid inlet pipe 16 communicates with the inside of the first-level hydraulic cavity 24. An auxiliary safety air pipe 17 is fixedly installed above the liquid inlet pipe 16. The liquid discharge end of the auxiliary safety air pipe 17 communicates with the inside of the hydraulic damping control device 19. The hydraulic damping control device 19 communicates with the inside of the second-level hydraulic cavity 27 and the first-level hydraulic cavity 24.

[0035] The liquid inlet valve interface is connected to an external hydraulic source. The liquid inlet pipe delivers hydraulic oil to the first-level hydraulic cavity to drive the first-level telescopic cylinder to act. The auxiliary safety air pipe provides auxiliary power for the hydraulic damping control device or maintains its function under special circumstances. The hydraulic damping control device realizes the control of the liquid inlet flow rate and the hydraulic damping function by communicating with each level of hydraulic cavity to ensure the stable operation of the oil cylinder.

[0036] Preferably, referring to the attached Figure 5 , the hydraulic damping control device 19 includes a proportional flow valve and a damper. The proportional flow valve is arranged in the air inlet circuit and is used to control the sequential air inlet of each level of oil cylinder. The damper is used to increase the gas return resistance when the oil cylinder falls.

[0037] The proportional flow valve precisely adjusts the hydraulic oil flow rate into each stage of the hydraulic cylinder to ensure the sequential movement of "the first telescopic cylinder 25 → the second telescopic cylinder 28 → the top block 29", making the jacking process stable and orderly. When the risk of the hydraulic cylinder falling appears, the damper increases the gas return resistance and slows down the falling speed of the hydraulic cylinder, greatly improving the safety of the device.

[0038] Preferably, referring to Appendix Figure 8 to Appendix Figure 10 As shown, the structure of the first-stage emergency locking device 33 is the same as that of the second-stage emergency locking device 37. The second-stage emergency locking device 37 includes a device housing 38. Inside the device housing 38, a second locking assembly 49 and a first locking assembly 47 are symmetrically installed. The first locking assembly 47 is arranged on the right side of the second locking assembly 49. The second locking assembly 49 includes a U-shaped partition 40. The U-shaped partition 40 is arranged at one end of the device housing 38. There is an extrusion cavity 41 between the U-shaped partition 40 and the inner wall of the device housing 38. A return spring 42 is fixedly installed in the extrusion cavity 41. The U-shaped partition 40 slides inside the device housing 38. The bottom wall of the U-shaped partition 40 has an opening. A fixing plate 43 slides vertically inside the U-shaped partition 40. A locking rod 39 is hinged above the fixing plate 43. The end of the locking rod 39 penetrates the device housing 38. The locking rod 39 is hinged to the device housing 38. The end of the locking rod 39 is a barb, which cooperates with the second-stage limit groove 36. A micro air pump 46 is fixedly installed at the bottom of the device housing 38. There are exhaust ports 44 on both sides of the micro air pump 46. Air pipes 45 are connected to both sides of the micro air pump 46. The air pipes 45 are connected to the exhaust ports 44.

[0039] When the locking is triggered, the micro air pump works. The gas enters the extrusion cavity through the air pipe and the exhaust port, pushing the U-shaped partition to move, and then driving the fixing plate and the locking rod to act. The barb at the end of the locking rod is stuck into the second-stage limit groove to achieve locking. The return spring resets the locking device when unlocking. The symmetrically arranged locking assemblies enhance the locking reliability and prevent the accidental sliding of the hydraulic cylinder.

[0040] Preferably, referring to Appendix Figure 1 As shown, a heightening platform pad 12 is fixedly installed at the bottom of the hydraulic cylinder 13. A slant platform bracket 11 is fixedly installed at the bottom of the heightening platform pad 12. A support table surface 48 is fixedly installed at the upper end of the slant platform bracket 11. There is a round hole in the middle of the support table surface 48 for the jacking plate 23 to extend out.

[0041] The heightening platform cushion can adjust the height of the device according to the on-site conditions to adapt to different terrains. The inclined platform bracket and the supporting tabletop provide a stable support foundation to disperse the pressure of the device on the ground. The jacking table board extends out through the round hole in the supporting tabletop to realize the jacking of the engineering pile replacement structure, ensuring the overall stability of the device and the realization of the jacking function.

[0042] Preferably, referring to the appendix Figure 4 The emergency braking linkage system further includes a controller. The sensors further include a pressure sensor and a displacement sensor. The pressure sensor and the displacement sensor are electrically connected to the controller. The controller has a built-in threshold judgment logic for receiving sensor data and sending a braking instruction to the electromagnetic braking device. The controller has a built-in timing control algorithm. The algorithm generates adjustment parameters for the air circuit proportional flow valve according to the data of the pressure sensor and the displacement sensor to ensure that the liquid inlet sequence of the three-stage oil cylinder assembly 22 accurately operates in the order of "primary telescopic cylinder 25 → secondary telescopic cylinder 28 → top block 29".

[0043] The pressure sensor monitors the internal pressure of the oil cylinder, and the displacement sensor monitors the telescopic displacement of the oil cylinder. The controller receives the data and, through the threshold judgment logic, sends a braking instruction to the electromagnetic braking device when the data is abnormal to perform an emergency brake to prevent accidents. At the same time, through the timing control algorithm, the proportional flow valve is adjusted according to the sensor data to accurately control the liquid inlet sequence of the three-stage oil cylinder assembly to ensure the stable and orderly operation of the oil cylinder.

[0044] The specific usage method of the present invention: First, fixedly install the heightening platform cushion 12 at the bottom of the hydraulic oil cylinder 13. Then, install the inclined platform bracket 11 at the bottom of the heightening platform cushion 12, and install the supporting tabletop 48 at the upper end of the inclined platform bracket 11. It is necessary to ensure that the round hole in the middle of the supporting tabletop 48 corresponds to the extending path of the jacking table board 23 to lay a foundation for subsequent jacking operations. It should be noted that in this structural design, the heightening platform cushion at the bottom of the hydraulic oil cylinder is not only used to adjust the height but also provides a stable support for the device. And because it is located at the bottom, when the system needs to release air during the operation of the device, the air release port can be set here. Utilizing the bottom space and cooperating with the multi-layer wrapping structure on the side (such as the outer shell 14 and the inner barrel 18 of the hydraulic oil cylinder and other multi-layer structures), it can effectively buffer and guide the pressure release to ensure the safety of the device and the surrounding environment. Firmly connect the liquid inlet end of the liquid inlet pipe 16 to the liquid inlet valve interface 15 to ensure a good seal of the liquid inlet passage, avoid liquid leakage, and ensure the normal operation of the subsequent hydraulic system. Carefully confirm that the proportional flow valve and damper in the air circuit damping control device 19 are correctly installed and functioning properly. The proportional flow valve is responsible for controlling the sequential intake of air into each cylinder, and the damper increases the gas return resistance when the cylinder falls, which is an important safety guarantee component. Start the sensors and electromagnetic braking devices of the emergency braking linkage system to make the sensors enter the working mode of real-time monitoring of the cylinder state. At the same time, turn on the controller to ensure that the pressure sensor, displacement sensor and controller are electrically connected normally, so as to accurately receive and process relevant data subsequently. Utilize the timing control algorithm built into the controller to ensure that the liquid inlet sequence of the three-stage cylinder assembly 22 operates precisely in the order of "primary telescopic cylinder 25 → secondary telescopic cylinder 28 → top block 29". Open the valve at the liquid inlet valve interface 15 and inject liquid into the primary hydraulic chamber 24 through the liquid inlet pipe 16. At this time, the proportional flow valve in the air circuit damping control device 19 controls the gas flow to ensure that the primary telescopic cylinder 25 moves first. The liquid pressure pushes the piston in the primary telescopic cylinder 25 to extend outward. When the primary telescopic cylinder 25 extends to the predetermined position, the primary locking assembly 20 is activated. The primary outer extension plate 32 slides to the corresponding position in the primary limit groove 31, and the primary emergency locking device 33 operates. The barb at the end of its locking rod 39 cooperates with the primary limit groove 31 to lock the primary telescopic cylinder 25. During this process, the conduction control between each hydraulic chamber is extremely crucial. The entire hydraulic system works in coordination with the air circuit damping control device 19 through liquid pipe connection components (such as the liquid inlet pipe 16, auxiliary safety air pipe 17, etc.). The proportional flow valve adjusts the air intake sequence of each cylinder, precisely controls the liquid flow rate and sequence entering different hydraulic chambers, and realizes the sequential conduction of each hydraulic chamber. And when a certain hydraulic chamber (such as the secondary hydraulic chamber 27) needs to be depressurized, the system relies on the relatively independent pipeline design of each hydraulic chamber and the possible one-way valve components (although not explicitly mentioned, but commonly used in practice) to ensure that other chambers (such as the primary hydraulic chamber 24) are not affected and can still work normally to maintain the stability of the supporting force.

[0045] Meanwhile, the liquid enters the secondary hydraulic chamber 27 through the middle trachea 26, pushing the secondary telescopic cylinder 28 to start operating. When the secondary telescopic cylinder 28 extends to a predetermined position, the secondary locking assembly 21 comes into play. The secondary outer extension plate 35 slides into place within the secondary limit slot 36, and the secondary emergency locking device 37 is activated. The locking rod 39 cooperates with the secondary limit slot 36 to lock the secondary telescopic cylinder 28. Subsequently, the liquid enters the top block 29 through the liquid pipe connecting the secondary telescopic cylinder 28 and the top block 29, pushing the lifting table plate 23 to slide upward until the lifting table plate 23 contacts the engineering pile underpinning structure to be supported.

[0046] The sensors of the emergency braking linkage system continuously monitor the state of the oil cylinder, including parameters such as pressure and displacement. The pressure sensor monitors the pressure changes in each hydraulic chamber, and the displacement sensor monitors the telescopic displacement of the oil cylinder. The sensors transmit the data to the controller in real time. The controller, based on the built-in threshold judgment logic, immediately sends a braking instruction to the electromagnetic braking device once an abnormal situation is detected to prevent dangerous situations such as the oil cylinder falling. The damper in the gas path damping control device 19 plays a role when the oil cylinder falls. When the oil cylinder shows a tendency to fall, the gas flows back, and the damper increases the resistance to the gas flow back, slowing down the falling speed of the oil cylinder, thereby achieving the hydraulic damping effect. For example, during normal operation, the gas flows according to the path and speed set by the proportional flow valve; while when the oil cylinder falls abnormally, the internal structure of the damper generates a large resistance to the flowing-back gas, like setting an obstacle to the gas flow, preventing the oil cylinder from falling quickly.

[0047] When the liquid inside the primary hydraulic chamber 24 and the secondary hydraulic chamber 27 is depressurized, the displacement sensor and the pressure sensor detect data fluctuations, and the flow valve provided between the gas path damping control device 19 and the secondary hydraulic chamber 27 and the primary hydraulic chamber 24 will be in an open state. The reserve liquid inside the gas path damping control device 19 will enter the secondary hydraulic chamber 27 and the primary hydraulic chamber 24 to achieve timely filling, preventing the secondary telescopic cylinder 28 and the primary telescopic cylinder 25 from falling instantaneously. When the pressure in the main hydraulic system drops, the liquid is replenished in a timely manner to maintain the stable support of the oil cylinder.

[0048] The primary locking assembly 20 and the secondary locking assembly 21 are respectively arranged on both sides of the primary telescopic cylinder 25 and the secondary telescopic cylinder 28. Taking the primary locking assembly 20 as an example, when the pressure sensor detects data changes, the primary emergency locking device 33 works, and the barb at the end of the locking rod 39 cooperates with the primary limit groove 31 to lock the primary telescopic cylinder 25. The working principle of the secondary locking assembly 21 is similar. When the secondary telescopic cylinder 28 reaches the predetermined position or an abnormal pressure change occurs, the secondary emergency locking device 37 is activated, and the locking rod 39 cooperates with the secondary limit groove 36 to lock the secondary telescopic cylinder 28. This mechanical locking method locks the oil cylinder through the cooperation of the physical structure when the oil cylinder works normally to the predetermined position or an abnormal pressure change occurs, preventing the oil cylinder from moving due to pressure changes.

[0049] When the hydraulic device is rising, the micro air pump 46 will evacuate the gas between the fixed plate 43 and the U-shaped partition 40, so that the locking rods 39 of the first locking assembly 47 and the second locking assembly 49 are close to each other and in a retracted state, which does not hinder the rise of the oil cylinder. When the cylinder reaches the predetermined position, the micro air pump 46 inflates the space between the fixed plate 43 and the U-shaped partition 40, and the inflation pushes the fixed plate 43 to swing the locking rod 39 to both sides, and locks it with the groove body of the first-level limit groove 31 (or the second-level limit groove 36). For example, after inflation, the gas pressure acts on the U-shaped partition 40, the U-shaped partition 40 pushes the fixed plate 43, and the fixed plate 43 drives the locking rod 39 to rotate, so that the barb at its end is stuck in the limit groove. In this way, the mechanical locking assembly and the micro air pump auxiliary locking cooperate with each other to achieve double locking, which further enhances the safety protection effect and prevents the oil cylinder from falling when the hydraulic system is abnormal.

[0050] In the reverse order of lifting, first operate the micro air pump 46 to inflate the exhaust port 44 through the air pipe 45, push the U-shaped partition 40 to move, so that the locking rod 39 is separated from the limit groove, and the locking state of the secondary emergency locking device 37 and the primary emergency locking device 33 is released. Then, by controlling the valve at the liquid inlet valve interface 15, the hydraulic oil is pumped in reverse, so that the top block 29, the secondary telescopic cylinder 28 and the primary telescopic cylinder 25 are retracted in turn. After the cylinder is retracted, close the valve at the inlet valve interface 15 to stop the inlet. Turn off the sensor, electromagnetic brake device and controller of the emergency brake linkage system. Remove the inclined platform bracket 11, the heightening platform pad 12 and other components in turn, clean and maintain the device for next use.

[0051] The embodiments of the present invention are given by way of example and description, and are not exhaustive or limit the present invention to the disclosed forms. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are chosen and described in order to better illustrate the principles of the present invention and its practical applications, and to enable those of ordinary skill in the art to understand the present invention and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A reinforcement support device for an engineering pile underpinning structure, comprising a hydraulic cylinder (13), wherein the hydraulic cylinder (13) comprises a three-stage cylinder assembly (22), wherein the three-stage cylinder assembly (22) comprises a primary telescopic cylinder (25), a secondary telescopic cylinder (28) and a top block (29) which are linked in sequence, wherein: Also includes: A hydraulic damping control device (19), the hydraulic damping control device (19) being connected to the three-stage oil cylinder assembly (22) and being used to control the liquid inlet flow and provide hydraulic damping when the oil cylinder falls; A mechanical locking structure, the mechanical locking structure being arranged between the piston and the cylinder body of each stage of the oil cylinder, the mechanical locking structure comprising a primary locking assembly (20) and a secondary locking assembly (21) fixedly installed between the third stage oil cylinder assembly (22) and the hydraulic damping control device (19), the primary locking assembly (20) and the secondary locking assembly (21) being capable of preventing the oil cylinder piston from accidentally sliding, thereby stably maintaining the telescopic position and providing reliable support force for the engineering pile underpinning structure; The emergency brake linkage system comprises a sensor and an electromagnetic brake device, wherein the sensor is used to monitor the state of the oil cylinder, and the electromagnetic brake device is used to perform braking after receiving a sensor signal.

2. The reinforcement support device for an engineering pile underpinning structure according to claim 1, characterized in that: The hydraulic cylinder (13) comprises an outer shell (14), a sealed protective cavity is provided inside the outer shell (14), an inner barrel (18) is installed in the sealed protective cavity, a liquid pipe connection assembly is arranged between the outer shell (14) and the inner barrel (18), a hydraulic damping control device (19) is arranged in an annular manner inside the inner barrel (18), a three-stage cylinder assembly (22) is installed inside the hydraulic damping control device (19), and a gas relief valve is provided at the bottom of the outer shell (14), and the gas relief valve is connected to the sealed protective cavity.

3. The reinforcement support device for an engineering pile underpinning structure according to claim 2, characterized in that: The three-stage oil cylinder assembly (22) comprises a U-shaped body, wherein a middle partition is provided inside the U-shaped body, wherein the middle partition divides the U-shaped body into a primary telescopic cylinder (25) and a secondary telescopic cylinder (28), wherein a primary hydraulic chamber (24) is provided between the primary telescopic cylinder (25) and the bottom wall of the U-shaped body, wherein a secondary hydraulic chamber (27) is provided between the secondary telescopic cylinder (28) and the middle partition, wherein a top block (29) is fixedly connected to the top of the secondary telescopic cylinder (28), wherein a lifting platform (23) slides inside the top block (29), wherein a piston plate is provided at one end of the lifting platform (23), wherein the piston plate slides inside the top block (29), wherein a middle air pipe (26) is connected between the primary hydraulic chamber (24) and the secondary hydraulic chamber (27), wherein a liquid pipe is also connected between the secondary telescopic cylinder (28) and the top block (29).

4. The reinforcement support device for an engineering pile underpinning structure according to claim 3, characterized in that: A primary locking assembly (20) is fixedly mounted on the outer side of the primary telescopic cylinder (25), the primary locking assembly (20) comprising a primary side wall (30), the primary side wall (30) having an internal cavity, the inner wall of the cavity having a primary limiting groove (31) fixedly mounted thereon, the side wall of the primary limiting groove (31) having a multi-stage limiting groove, a primary outer extension plate (32) being slidably mounted on the inner side of the limiting groove, a primary emergency locking device (33) being fixedly mounted on the primary outer extension plate (32), the other end of the primary outer extension plate (32) being fixedly connected to the outer wall of the primary telescopic cylinder (25).

5. The reinforcement support device for an engineering pile underpinning structure according to claim 4, characterized in that: A secondary locking assembly (21) is fixedly connected to the outer side of the secondary telescopic cylinder (28), and the secondary locking assembly (21) comprises a secondary side wall (34), a cavity is provided inside the secondary side wall (34), a secondary limiting groove (36) is fixedly installed on the inner wall of the cavity, a secondary outer extension plate (35) is slidably provided in the secondary limiting groove (36), a secondary emergency locking device (37) is fixedly installed above the secondary outer extension plate (35), and one end of the secondary outer extension plate (35) is fixedly connected to the outer wall of the secondary telescopic cylinder (28).

6. The reinforcement support device for an engineering pile underpinning structure according to claim 5, characterized in that: The liquid pipe connection assembly comprises a liquid inlet pipe (16), the liquid inlet end of the liquid inlet pipe (16) is fixedly connected to a liquid inlet valve interface (15), the liquid outlet end of the liquid inlet pipe (16) is in communication with the interior of the primary hydraulic chamber (24), an auxiliary safety air pipe (17) is fixedly installed above the liquid inlet pipe (16), the liquid discharge end of the auxiliary safety air pipe (17) is in communication with the interior of the hydraulic damping control device (19), and the hydraulic damping control device (19) is in communication with the interiors of the secondary hydraulic chamber (27) and the primary hydraulic chamber (24).

7. The reinforcement support device for an engineering pile underpinning structure according to claim 6, characterized in that: The hydraulic damping control device (19) comprises a proportional flow valve and a damper, wherein the proportional flow valve is arranged in an air intake circuit and is used to control the sequential air intake of each stage of the cylinders, and the damper is used to increase the gas reflux resistance when the cylinder falls.

8. The reinforcement support device for an engineering pile underpinning structure according to claim 7, characterized in that: The first-level emergency locking device (33) has the same structure as the second-level emergency locking device (37), and the second-level emergency locking device (37) comprises a device housing (38), and a second locking component (49) and a first locking component (47) are symmetrically installed inside the device housing (38), and the first locking component (47) is arranged on the right side of the second locking component (49), and the second locking component (49) comprises a U-shaped partition (40), and the U-shaped partition (40) is arranged at one end of the device housing (38), and an extrusion cavity (41) is provided between the U-shaped partition (40) and the inner wall of the device housing (38), and a return spring (42) is fixedly installed in the extrusion cavity (41), and the U-shaped partition (40) slides inside the device housing (38); The bottom wall of the U-shaped partition (40) is provided with an opening, and a fixing plate (43) is vertically slidably provided inside the U-shaped partition (40). A locking rod (39) is hingedly provided above the fixing plate (43), and an end of the locking rod (39) passes through the device housing (38). The locking rod (39) and the device housing (38) are hingedly connected, and the end of the locking rod (39) is a barb, which cooperates with the secondary limiting groove (36). A micro air pump (46) is fixedly installed at the bottom of the device housing (38), and exhaust ports (44) are provided on both sides of the micro air pump (46). Air pipes (45) are connected to both sides of the micro air pump (46), and the air pipes (45) are connected to the exhaust ports (44).

9. The reinforcement support device for an engineering pile underpinning structure according to claim 8, characterized in that: A raised platform pad (12) is fixedly mounted on the bottom of the hydraulic cylinder (13); an inclined platform bracket (11) is fixedly mounted on the bottom of the raised platform pad (12); a support table (48) is fixedly mounted on the upper end of the inclined platform bracket (11); a circular hole is provided in the middle of the support table (48) for extending the lifting platform plate (23).

10. The reinforcement support device for an engineering pile underpinning structure according to claim 9, characterized in that: The emergency brake linkage system also includes a controller, and the sensor also includes a pressure sensor and a displacement sensor. The pressure sensor and the displacement sensor are electrically connected to the controller. The controller has a built-in threshold judgment logic for receiving sensor data and sending a braking command to the electromagnetic brake device.

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