Double-cylinder linkage hydraulic device

Abstract

The utility model discloses a double-cylinder linkage hydraulic device which aims at solving the technical problems that in the prior art, adaptability is poor in the ruin rescue environment, and secondary damage is likely to be caused. The device mainly comprises an axial hydraulic cylinder and a radial hydraulic cylinder, the radial hydraulic cylinder is arranged on the side face of the axial hydraulic cylinder, a piston and a piston rod are arranged in the radial hydraulic cylinder, and the bidirectional pushing function is achieved through an oil inlet pipeline and an oil outlet pipeline; a cylinder barrel of the radial hydraulic cylinder is connected with the axial hydraulic cylinder, and radial pushing supporting is achieved through an oil inlet pipeline system and an oil outlet pipeline system. In addition, the device is further provided with a supporting device comprising a universal joint and a supporting leg so as to adapt to complex terrains. All the structures are tightly matched, so that the device has efficient rescue capacity and can stably work in a complex environment, secondary damage is effectively avoided, the stability and reliability of the device are greatly improved, and reliable technical support is provided for rescue of various rescue scenes, especially natural disasters such as earthquakes.

Description

Technical Field

[0001] This utility model relates to the field of rescue and safety equipment, specifically to a dual-cylinder linkage hydraulic device. Background Technology

[0002] Earthquakes, mudslides, and other natural disasters are major events that seriously threaten human life and property. When these disasters occur, they often cause a large number of buildings to collapse instantly, trapping people in the rubble, making rescue work extremely urgent. In such emergency rescue scenarios, the currently widely used rescue methods and equipment have many drawbacks.

[0003] While traditional excavators, loaders, and other construction machinery have a certain advantage in rescue operations, their operational characteristics make them prone to causing rocks to slide when clearing rubble. This not only poses a significant risk of secondary injury to trapped individuals, such as being hit or buried by falling rocks, but can also damage the already unstable structure of the rubble, causing a more severe collapse, making the rescue work even more difficult, and even directly threatening the lives of rescue personnel.

[0004] In theory, hoisting can prevent horizontal movement of the stones and reduce the risk of secondary collapse. However, the actual situation after an earthquake is extremely complex, with mountains of debris and severely twisted and deformed building structures, making it extremely difficult to find a suitable location for the hoisting hook. Rescue workers often need to spend a lot of time painstakingly searching for safe and stable footholds in the rubble, which, in the race against time, could very likely cause trapped people to miss the best rescue opportunity, putting their lives at greater risk.

[0005] Manual excavation, while a basic rescue method and sometimes unavoidable, is inefficient and time-consuming. Rescuers, armed only with simple tools, struggle to dig through the rubble amidst vast amounts of debris and complex structures, resulting in slow progress. Furthermore, in unstable rubble structures, manual excavation itself can trigger further collapses, posing a serious threat to the lives of both trapped individuals and rescuers. It can also lead to missed opportunities during crucial rescue periods, resulting in rescue failure.

[0006] Hydraulic jacks are commonly used in rescue operations. However, they face numerous challenges in complex rubble environments. In narrow and complex spaces, their large size makes it difficult to position them correctly, hindering their hydraulic operation. In low-ceilinged spaces, their handles cannot be fully extended, making it difficult for operators to apply sufficient force. Even in larger spaces where jacks can be placed, uneven ground or smooth stone surfaces often cause slippage, making it difficult to find a stable fulcrum. This results in ineffective force transmission when lifting stones, leading to easy displacement. Even when a fulcrum is found, there may be concentrated stress, causing uneven stress on the rubble and potentially cracking walls, thus limiting the jack's lifting capacity.

[0007] Currently, one type of integrated hydraulic demolition tool, the electric spreader, exists in rescue equipment. While it is easy to carry and operate, and is commonly used to cut steel bars in metal and cement, helping to expand maneuverable space, its sharp cutting edges pose a serious safety hazard when rescuing trapped personnel. During the removal of rubble and obstacles, even slight carelessness could result in cuts to those being rescued, leading to a low safety factor, a high risk of secondary injuries, and hindering the smooth progress of rescue operations.

[0008] In conclusion, existing rescue methods and equipment have revealed numerous problems when facing complex earthquake rubble environments. Therefore, there is an urgent need for a compact rescue device capable of operating in confined spaces to improve rescue success rates, reduce secondary injuries, and buy more precious time to save the lives of trapped individuals. Utility Model Content

[0009] The purpose of this invention is to provide a dual-cylinder linkage hydraulic device to overcome the shortcomings of existing technologies in terms of poor adaptability and the tendency to cause secondary injuries in the rubble rescue environment.

[0010] To achieve the above objectives, the present invention adopts the following technical solution:

[0011] A dual-cylinder linkage hydraulic device, comprising:

[0012] An axial hydraulic cylinder includes an axial hydraulic cylinder head and an axial cylinder barrel. The axial hydraulic cylinder head is fixed on the end face of the axial cylinder barrel, and an axial piston rod is arranged in the axial cylinder barrel.

[0013] A radial hydraulic cylinder is installed on the side of an axial hydraulic cylinder. The radial hydraulic cylinder includes a radial hydraulic cylinder barrel and a radial piston rod. The radial hydraulic cylinder barrel is connected to the side of the axial hydraulic cylinder, and a piston is connected to the radial piston rod.

[0014] An axial piston is arranged on the axial piston rod, and the axial piston drives the axial piston rod to slide axially.

[0015] One end face of the axial cylinder is connected to the cylinder head of the axial hydraulic cylinder, and the other end face is provided with a reduced diameter structure. The diameter of the reduced diameter structure is the same as the diameter of the cylinder head of the axial hydraulic cylinder.

[0016] The axial piston is fixed on the axial piston rod by a stop pin.

[0017] The axial cylinder is divided into an axial oil inlet chamber and an axial oil outlet chamber by an axial piston; the axial oil inlet chamber is connected to an axial oil inlet pipe, and the axial oil outlet chamber is connected to an axial oil outlet pipe.

[0018] Axial piston rod guide sleeves are installed at both ends of the axial hydraulic cylinder head and the axial cylinder barrel that are not connected to each other.

[0019] The piston on the radial piston rod is integrally formed.

[0020] The bottom of the radial hydraulic cylinder is connected to a third radial oil inlet pipe, the other end of which is connected to a second radial oil inlet pipe. The second radial oil inlet pipe is also connected to a first radial oil inlet pipe.

[0021] The bottom of the radial hydraulic cylinder is connected to a third radial oil outlet pipe, the other end of which is connected to a second radial oil outlet pipe. The second radial oil outlet pipe is also connected to a first radial oil outlet pipe.

[0022] The dual-cylinder linkage hydraulic device also includes a support device, which is connected to the axial hydraulic cylinder and includes a universal joint. The other end of the universal joint is also connected to a support foot.

[0023] Compared with the prior art, the present invention has the following beneficial technical effects:

[0024] This invention provides a dual-cylinder linkage hydraulic device. Through the coordinated operation of axial and radial hydraulic cylinders, the bidirectional pushing of the axial hydraulic cylinder and the stable support of the radial hydraulic cylinder, it can respond to complex rescue scenarios more quickly and effectively compared to traditional rescue equipment, significantly shortening rescue time. It has strong adaptability to complex rescue environments, a compact structure, and can operate smoothly in harsh conditions such as narrow gaps and rugged terrain. The cooperation between the universal joint and the support feet allows it to stand stably on complex terrain, overcoming the problem of traditional equipment's demanding environmental requirements. Operational safety is greatly improved. The fixed stop pin of the axial piston, the reliable design of the radial piston rod, and the setting of the axial piston rod guide sleeve reduce safety risks during rescue from multiple aspects, effectively avoiding secondary injuries and ensuring personnel safety. The stability and reliability of the equipment are enhanced. The solid connection between components, the reasonable pipeline design, and the good sealing performance ensure stable hydraulic oil transmission and pressure control, reducing rescue interruptions caused by equipment failure, improving the rescue success rate, and allowing for continuous and stable operation during long-term rescue work. Its overall performance is superior to some existing rescue equipment. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of a dual-cylinder linkage hydraulic device in an embodiment of this utility model.

[0026] Figure 2 This is a schematic diagram of the axial piston rod in a dual-cylinder linkage hydraulic device according to an embodiment of the present invention.

[0027] Figure 3 This is a schematic diagram of the radial hydraulic cylinder structure in a dual-cylinder linkage hydraulic device according to an embodiment of the present invention.

[0028] Figure 4 This is a schematic diagram of the axial hydraulic cylinder in a dual-cylinder linkage hydraulic device according to an embodiment of the present invention.

[0029] Figure 5 This is a schematic diagram of the radial hydraulic cylinder connection pipeline in a dual-cylinder linkage hydraulic device according to an embodiment of the present invention.

[0030] In the diagram, 1. Axial hydraulic cylinder head; 2. Axial cylinder barrel; 3. Rubber soft shell; 4. Universal joint; 5. Support foot; 6. Axial piston rod; 7. Stop pin; 8. Axial piston; 9. Axial piston rod guide sleeve; 10. Radial hydraulic cylinder barrel; 11. Radial piston and piston rod; 12. Axial oil inlet pipe; 13. Axial oil outlet pipe; 14. First radial oil inlet pipe; 15. Second radial oil inlet pipe; 16. Third radial oil inlet pipe; 17. First radial oil outlet pipe; 18. Second radial oil outlet pipe; 19. Third radial oil outlet pipe; 20. Axial oil inlet chamber; 21. Axial oil outlet chamber. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] In the description of this utility model, 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", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0033] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" 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 a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "several" means two or more, unless otherwise explicitly specified.

[0035] Example:

[0036] A specific embodiment of this utility model provides a dual-cylinder linkage hydraulic device, such as... Figure 1 As shown, it includes:

[0037] Axial hydraulic cylinders are used to realize the axial pushing function of hydraulic devices. Axial hydraulic cylinders are double-acting, double-piston rod cylinders with equal stroke and constant speed, possessing bidirectional pushing capability. They can precisely control the pushing and lowering actions to adapt to different needs. Several radial hydraulic cylinders are arranged on the side of the cylinder body; through the coordinated work of both, they can stably cope with complex rubble structures and rescue scenarios.

[0038] The radial hydraulic cylinder, located to the side of the axial hydraulic cylinder, is a double-acting, single-piston-rod type, with the piston rod capable of bidirectional movement. It is used to achieve the radial pushing function of the hydraulic device. Its main function is to ensure close contact with the inner wall of the rock during rescue operations, providing radial support and preventing the rock from shifting or sliding during axial pushing, thus ensuring the safety and stability of the rescue work.

[0039] The axial hydraulic cylinder includes an axial hydraulic cylinder head 1 and an axial cylinder barrel 2. The axial hydraulic cylinder head 1 is fixed to the end face of the axial cylinder barrel 2 by means of flange connection. This connection method is simple, strong and reliable, easy to process and assemble, and ensures the overall structural stability of the axial hydraulic cylinder.

[0040] An axial piston rod 6 is arranged in the axial cylinder 2. The axial piston rod 6 is a key component for realizing the axial pushing action, and its smooth sliding in the cylinder is essential for the normal operation of the device.

[0041] like Figure 2 As shown, an axial piston 8 is arranged on the axial piston rod 6. The axial piston 8 is tightly fitted with the axial piston rod 6. When hydraulic oil enters the corresponding chamber, the axial piston 8 drives the axial piston rod 6 to slide axially under the action of oil pressure, thereby realizing the pushing and retracting action of the axial hydraulic cylinder. The axial piston 8 is an important device that slides along the inner wall of the cylinder under the thrust of the oil, and it needs to be properly matched with the cylinder barrel 2 of the axial hydraulic cylinder. The diameter of the axial piston 8 is the same as the inner diameter of the axial cylinder barrel 2. The sealing method is a C-type skeleton oil seal, i.e., a vehicle-type combination seal, and the piston is an integral piston. The integral piston has grooves cut into its circumference to facilitate the installation of the sealing ring.

[0042] The axial piston 8 is fixed to the axial piston rod 6 by a stop pin 7. The connection between the axial piston 8 and the axial piston rod 6 is a threaded connection, with the stop pin 7 inserted in the middle to fix the axial piston 8 and prevent axial misalignment. The stop pin 7 effectively prevents the axial piston 8 from axially displacing or rotating during operation, ensuring the accuracy and stability of the piston rod movement and ensuring precise control of operation.

[0043] like Figure 4 As shown, the axial cylinder 2 is divided into an axial oil inlet chamber 20 and an axial oil outlet chamber 21 by the axial piston 8. The axial oil inlet chamber 20 is connected to an axial oil inlet pipe 12. When pressurized oil is introduced into the axial oil inlet pipe 12, the oil enters the axial oil inlet chamber 20, pushing the axial piston rod 6 to extend outward, realizing the axial pushing function, which can lift stones upward during rescue.

[0044] The axial oil outlet chamber 21 is connected to the axial oil outlet pipe 13. When the reversing valve switches, the pressurized oil enters the axial oil outlet chamber 21 from the axial oil outlet pipe 13, which can drive the axial cylinder 2 to move in the opposite direction, causing the stone to fall back or perform other corresponding operations to meet the needs of different rescue stages.

[0045] Axial piston rod guide sleeves 9 are installed at the two ends of the axial hydraulic cylinder head 1 and axial cylinder barrel 2 that are not connected to each other. The axial piston rod guide sleeves 9 are bushing-type structures, installed at the ends of the axial hydraulic cylinder head 1 and axial cylinder barrel 2, providing precise guidance for the reciprocating motion of the axial piston rod 6. This ensures that the piston rod maintains good coaxiality during movement, reducing friction and wear, and improving the working efficiency and service life of the device. The axial piston rod 6 slides within the axial piston rod guide sleeve 9 to ensure the coaxiality of the outer circle of the axial piston rod 6 with the outer circle of the cylinder body. The axial piston rod guide sleeve 9 is a bushing type, and a sealing device is installed on the guide sleeve. A dustproof ring is installed on its outer side to prevent impurities and dust in the air from being brought to the seal when the piston rod finishes its stroke, which could shorten the life of the sealing device or even damage it. The guide sleeve 9 is threadedly connected to the axial hydraulic cylinder head 1.

[0046] A sealing device is installed on the guide sleeve 9 to effectively prevent hydraulic oil leakage. At the same time, a dustproof ring is also installed on the outside. When the piston rod finishes its work and exits its stroke, the dustproof ring can prevent impurities and dust in the air from being carried to the seal, avoiding damage to the sealing device due to impurities and ensuring the long-term stable operation of the device.

[0047] like Figure 3 As shown, the radial hydraulic cylinder includes a radial hydraulic cylinder barrel 10 and a radial piston rod 11. The radial hydraulic cylinder barrel 10 is connected to the side of the axial hydraulic cylinder through a flange. A sealing ring is provided at the connection to ensure a firm connection and good sealing, prevent hydraulic oil leakage, and ensure that the radial hydraulic cylinder and the axial hydraulic cylinder can work together stably.

[0048] The radial piston rod 11 has a piston integrally formed on it. This integrated design enhances the integrity and reliability of the structure. It adopts a vehicle-type combined seal, and the sealing ring is installed in the circumferential groove of the piston to ensure good sealing performance. This allows the radial hydraulic cylinder to withstand greater working pressure and stably provide radial support force during rescue operations.

[0049] like Figure 5 As shown, the bottom of the radial hydraulic cylinder barrel 10 is connected to a third radial oil inlet pipe 16, and the other end of the third radial oil inlet pipe 16 is connected to a second radial oil inlet pipe 15. The second radial oil inlet pipe 15 is also connected to a first radial oil inlet pipe 14. Hydraulic oil enters the bottom of the radial hydraulic cylinder barrel 10 through this series of oil inlet pipes, pushing the radial piston rod 11 to extend outward and press against the inner wall of the stone, providing stable radial support for axial pushing.

[0050] The bottom of the radial hydraulic cylinder barrel 10 is also connected to a third radial oil outlet pipe 19. The other end of the third radial oil outlet pipe 19 is connected to a second radial oil outlet pipe 18. The second radial oil outlet pipe 18 is also connected to a first radial oil outlet pipe 17. When the radial piston rod 11 needs to retract, pressurized oil enters from the oil outlet pipe, causing the piston rod to retract and complete a working cycle. This design of the oil inlet and outlet pipes enables precise control of the radial piston rod movement and adapts to the operational needs of different rescue scenarios.

[0051] like Figure 1 As shown, the dual-cylinder linkage hydraulic device also includes a support device, which is connected to the axial hydraulic cylinder. The support device includes a universal joint 4, which is divided into upper and lower parts. The upper part is bolted to the bottom of the axial piston rod 6, effectively restricting the degree of freedom of the axial piston rod and keeping it stable during the pushing process. The lower part is bolted to the support foot 5.

[0052] The bottom of the support foot 5 is provided with a protrusion, which can effectively prevent slipping on uneven ground. The pivots are fixed with bolts and nuts and shims are added to ensure that the pivots can rotate smoothly. This allows the entire device to remain stable under different terrain conditions, providing a reliable support foundation for the device to work effectively in complex rubble rescue environments, ensuring the smooth progress of rescue operations, and improving rescue efficiency and safety.

[0053] In actual earthquake rescue scenarios, the working process of this dual-cylinder linkage hydraulic device is as follows:

[0054] First, rescuers adjust the position and angle of the device according to the location and shape of the rubble stones, so that the axial cylinder 2 is close to the stone that needs to be pushed, and ensure that the support foot 5 is in stable contact with the ground. Through the adaptive adjustment of the universal joint 4, it adapts to the uneven ground conditions.

[0055] Next, pressurized oil is introduced into the oil inlet pipe of the radial hydraulic cylinder through the first radial oil inlet pipe 14, the second radial oil inlet pipe 15, and the third radial oil inlet pipe 16 in sequence, causing the radial piston rod 11 to extend outward until the end of the piston rod is in close contact with the inner wall of the stone. Through the adaptive design of the radial hydraulic cylinder, it is ensured that the piston rod is fully in contact with the inner wall of the stone, providing sufficient friction and support force to prevent the stone from sliding or deviating during the subsequent axial pushing process.

[0056] Then, pressurized oil is introduced into the axial hydraulic cylinder's inlet pipe, i.e., the axial inlet pipe 12. The pressurized oil enters the axial inlet chamber 20, pushing the axial piston rod 6 to the left. Here, the pushing direction is set to the left, causing the stone to rise and realizing the axial pushing function. During the pushing process, the axial piston rod guide sleeve 9 ensures the movement accuracy and stability of the piston rod. At the same time, the good sealing between the axial piston 8 and the axial cylinder 2, as well as the fixing effect of the stop pin 7, ensure the reliable execution of the pushing operation.

[0057] When the rescue mission is completed and the device needs to be withdrawn, first switch the reversing valve to allow pressurized oil to enter the oil outlet pipe of the axial hydraulic cylinder, namely the axial oil outlet pipe 13. The pressurized oil enters the axial oil outlet chamber 21, pushing the hydraulic cylinder barrel 2 to move the stone downwards together and fall back to the initial position.

[0058] Finally, the directional valve is switched again, so that the oil outlet pipe of the radial hydraulic cylinder passes through the first radial oil outlet pipe 17, the second radial oil outlet pipe 18, and the third radial oil outlet pipe 19 in sequence to introduce pressurized oil, which pushes the radial piston rod 11 to retract, separating the cylinder body from the inner wall of the rock, completing the entire rescue operation process, and the device is ready for the next rescue mission.

[0059] In addition, the hydraulic cylinder can adapt to jacking in various directions. If the rubble is complex and jacking is not possible, the hydraulic cylinder can be placed in reverse and the return stroke of the piston rod can be used to lift the stones.

[0060] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A dual-cylinder linkage hydraulic device, characterized in that, include: An axial hydraulic cylinder includes an axial hydraulic cylinder cover (1) and an axial cylinder barrel (2). The axial hydraulic cylinder cover (1) is fixed on the end face of the axial cylinder barrel (2), and an axial piston rod (6) is arranged in the axial cylinder barrel (2). A radial hydraulic cylinder is installed on the side of the axial hydraulic cylinder. The radial hydraulic cylinder includes a radial hydraulic cylinder barrel (10) and a radial piston rod (11). The radial hydraulic cylinder barrel (10) is connected to the side of the axial hydraulic cylinder, and a piston is connected to the radial piston rod (11).

2. The dual-cylinder linkage hydraulic device according to claim 1, characterized in that, An axial piston (8) is arranged on the axial piston rod (6), and the axial piston (8) drives the axial piston rod (6) to slide axially.

3. The dual-cylinder linkage hydraulic device according to claim 2, characterized in that, One end face of the axial cylinder (2) is connected to the cylinder head (1) of the axial hydraulic cylinder, and the other end face is provided with a reduced diameter structure. The diameter of the reduced diameter structure is the same as the diameter of the cylinder head (1) of the axial hydraulic cylinder.

4. A dual-cylinder linkage hydraulic device according to claim 2, characterized in that, The axial piston (8) is fixed on the axial piston rod (6) by a stop pin (7).

5. A dual-cylinder linkage hydraulic device according to claim 2, characterized in that, The axial cylinder (2) is divided into an axial oil inlet chamber (20) and an axial oil outlet chamber (21) by an axial piston (8); the axial oil inlet chamber (20) is connected to an axial oil inlet pipe (12), and the axial oil outlet chamber (21) is connected to an axial oil outlet pipe (13).

6. A dual-cylinder linkage hydraulic device according to claim 2, characterized in that, The two ends of the axial hydraulic cylinder head (1) and axial cylinder barrel (2) that are not connected to each other are respectively equipped with axial piston rod guide sleeves (9).

7. A dual-cylinder linkage hydraulic device according to claim 1, characterized in that, The piston on the radial piston rod (11) is integrally formed.

8. A dual-cylinder linkage hydraulic device according to claim 7, characterized in that, The bottom of the radial hydraulic cylinder barrel (10) is connected to a third radial oil inlet pipe (16), and the other end of the third radial oil inlet pipe (16) is connected to a second radial oil inlet pipe (15). The second radial oil inlet pipe (15) is also connected to a first radial oil inlet pipe (14).

9. A dual-cylinder linkage hydraulic device according to claim 7, characterized in that, The bottom of the radial hydraulic cylinder barrel (10) is connected to a third radial oil outlet pipe (19), and the other end of the third radial oil outlet pipe (19) is connected to a second radial oil outlet pipe (18). The second radial oil outlet pipe (18) is also connected to a first radial oil outlet pipe (17).

10. A dual-cylinder linkage hydraulic device according to claim 1, characterized in that, It also includes a support device, which is connected to an axial hydraulic cylinder and includes a universal joint (4), the other end of which is also connected to a support foot (5).

Images