Lightweight valve seat structure for oil cylinder

Abstract

The utility model discloses a kind of light-weight valve seat structures for oil cylinder belongs to hydraulic equipment parts technical field.The valve seat structure splits the original integral oil passage valve seat into balance valve fixed block and oil passage block, balance valve fixed block is provided with threaded hole, installation groove and positioning protrusion, and oil passage block is provided with oil passage channel and positioning groove;Balance valve fixed block is pre-assembled and positioned by threaded hole and auxiliary tool, and full welding after accurate cooperation of oil passage block and balance valve fixed block by positioning structure.The structure retains the function of original valve seat, significantly reduces the welding amount to reduce the deformation of cylinder bore, significantly reduces the weight of valve seat to realize light weight, ensures assembly accuracy through positioning structure, optimizes welding process to improve production efficiency, and has strong adaptability, and can be widely applied to various oil cylinder equipment.

Description

Technical Field

[0001] This utility model relates to a lightweight valve seat structure for hydraulic cylinders, belonging to the technical field of hydraulic cylinder components. Background Technology

[0002] In hydraulic systems, the hydraulic cylinder, as the core actuator that converts hydraulic energy into mechanical energy, mainly consists of four major components: cylinder barrel, piston rod, piston, and guide sleeve. Its operating accuracy and stability directly affect the working performance of the entire hydraulic equipment. The valve seat, as a key component connecting the hydraulic cylinder and the hydraulic system, plays a crucial role in controlling the flow of hydraulic oil and fixing components. Its structural design and installation method have a vital impact on the overall performance, service life, and lightweighting level of the hydraulic cylinder.

[0003] In the existing technology, the oil passage valve seat for hydraulic cylinders mostly adopts an integral structure. This type of integral oil-pass valve seat has significant drawbacks in actual installation: First, to ensure connection strength and sealing, the integral oil-pass valve seat requires full welding to components such as the cylinder barrel. The large amount of welding generates a significant amount of heat, causing deformation of the cylinder bore due to thermal stress. This affects the fit accuracy between the piston rod and the cylinder barrel, reduces the operational stability of the hydraulic cylinder, and may even lead to hydraulic oil leakage. Second, the integral structure design results in a larger overall volume and weight of the valve seat, increasing the overall weight of the cylinder, hindering lightweight design, and increasing the cost and difficulty of production, transportation, and installation. Third, if the installation and fixing function of the integral oil-pass valve seat is split into multiple balance valve fixing blocks to meet specific installation requirements, additional auxiliary tooling (such as balance valves) is needed during welding to ensure that the mounting surfaces of these blocks are on the same reference plane. The blocks are first assembled using threaded connections before welding, a cumbersome process that increases production steps, reduces production efficiency, and requires a high level of technical skill from the operators. Utility Model Content

[0004] To overcome the shortcomings of the existing technology, this utility model provides a lightweight valve seat structure for hydraulic cylinders, which aims to solve the problems of large welding volume, easy deformation of cylinder bore, large valve seat weight, and cumbersome welding and positioning of multiple balance valve fixing blocks in the existing integral oil passage valve seat. Under the premise of ensuring the function and structural strength of the valve seat, lightweight design is achieved, installation process is optimized, and production efficiency is improved.

[0005] This utility model is achieved through the following technical solution: a lightweight valve seat structure for a hydraulic cylinder, comprising a balance valve fixing block and an oil passage block, wherein the balance valve fixing block and the oil passage block are combined to form a valve seat structure adapted to the hydraulic cylinder, wherein the balance valve fixing block and the oil passage block are respectively welded to the hydraulic cylinder, wherein the balance valve fixing block is connected and fixed to the corresponding component of the hydraulic cylinder by partial spot welding, and the oil passage block is connected and fixed to the corresponding component of the hydraulic cylinder by full welding.

[0006] The balance valve fixing block is provided with threaded holes for cooperating with auxiliary tooling. The balance valve fixing block is connected to the auxiliary tooling through threaded connectors, so that the mounting surfaces of multiple balance valve fixing blocks are on the same reference plane.

[0007] The auxiliary tooling is a balancing valve. The connection structure of the balancing valve is adapted to the threaded hole of the balancing valve fixing block. At least two balancing valve fixing blocks are pre-assembled by the balancing valve and then spot welded locally.

[0008] The oil passage block is provided with an oil passage channel of the same specifications as the original integral oil passage valve seat. The position and diameter of the oil passage channel correspond to and match the oil port of the hydraulic cylinder and the connection port of the hydraulic system.

[0009] A positioning structure is provided between the balance valve fixing block and the oil passage block. The positioning structure includes a positioning protrusion on the balance valve fixing block and a positioning groove on the oil passage block. The positioning protrusion and the positioning groove cooperate to achieve precise positioning and assembly of the balance valve fixing block and the oil passage block.

[0010] Welding method optimization: The balance valve fixing block is connected and fixed to the corresponding part of the oil cylinder by partial spot welding, and the oil passage block is connected and fixed to the corresponding part of the oil cylinder by full welding. By reducing the total amount of welding, the impact of thermal stress on the cylinder is reduced. Positioning structure design: The balance valve fixing block is provided with threaded holes, which can be used with auxiliary tooling (such as balance valve) through threaded connectors to realize the pre-assembly positioning of multiple balance valve fixing blocks, ensuring that each mounting surface is on the same reference plane; at the same time, the balance valve fixing block and the oil passage block are provided with a positioning protrusion and positioning groove mating structure to ensure precise assembly of the two. Function and strength assurance: The oil passage block is equipped with an oil passage of the same specifications as the original integral oil passage valve seat to ensure smooth hydraulic oil flow; the balance valve fixing block and the oil passage block are made of the same material as the original integral valve seat, and the structural dimensions are designed to be adapted to the cylinder specifications to ensure that the overall structural strength after assembly meets the usage requirements; the balance valve fixing block is also equipped with an installation groove adapted to the balance valve to ensure stable assembly of the balance valve.

[0011] The beneficial effects of this utility model are: reducing cylinder bore deformation and improving equipment precision: compared with the full welding operation of the original integral oil valve seat, the balance valve fixing block in this utility model adopts partial spot welding, which greatly reduces the total amount of welding, reduces the thermal stress effect of heat on the cylinder during welding, effectively reduces the deformation of the cylinder bore, ensures the matching precision of the piston rod and the cylinder, improves the operating stability of the hydraulic cylinder, and reduces the failure rate. Achieving lightweight design and reducing costs and difficulty: The integral structure is split into a combination structure of a balance valve fixing block and an oil passage block. Under the premise of ensuring structural strength and functional requirements, unnecessary material parts in the original integral structure are removed, significantly reducing the overall weight of the valve seat. This not only facilitates the lightweight design of the cylinder and the whole machine and reduces the energy consumption of the equipment, but also reduces the cost and operational difficulty in the production, processing, transportation and installation of the valve seat. Optimize the welding process and improve production efficiency: By setting threaded holes on the balance valve fixing block and cooperating with auxiliary tooling, the pre-assembly and positioning of multiple balance valve fixing blocks can be achieved, ensuring that the mounting surface reference is consistent. At the same time, the positioning structure between the balance valve fixing block and the oil passage block further improves the assembly accuracy. Local spot welding operation is relatively simple. Combined with the pre-assembly steps, the welding process is greatly simplified, production steps are reduced, production efficiency is improved, and the technical level requirements for operators are reduced. To ensure stable function and improve adaptability: the specifications of the oil passage of the oil passage block and the installation groove size of the balance valve fixing block are compatible with the original components, and the materials of both are consistent with the original integral valve seat. This ensures that the combined valve seat can not only completely replace the original integral valve seat to realize the functions of oil passage, connection and balance valve installation, but also adapt to different specifications of oil cylinders, and has strong versatility. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] Figure 1 This is an exploded view of the lightweight valve seat structure for hydraulic cylinders according to this utility model.

[0014] In the diagram: 1. Balance valve fixing block; 2. Oil passage block; 3. Threaded hole; 4. Oil passage channel. Detailed Implementation

[0015] 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.

[0016] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," 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 do not indicate or imply that the device or element 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; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. 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 a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0017] like Figure 1 The lightweight valve seat structure for a hydraulic cylinder shown comprises a balance valve fixing block 1 and an oil passage block 2. The balance valve fixing block 1 has a threaded hole 3, a mounting groove, and a positioning protrusion, while the oil passage block 2 has an oil passage 4 and a positioning groove. The specific steps in actual production and installation are as follows: Component processing: Based on the specifications and performance requirements of the target cylinder, the same material as the original integral oil passage valve seat is used to process the matching balance valve fixing block 1 and oil passage block 2, ensuring that the dimensional accuracy of the threaded hole 3, mounting groove, positioning protrusion on the balance valve fixing block 1 and the oil passage channel 4 and positioning groove on the oil passage block 2 meets the design standards. Pre-assembly positioning: Select a balance valve that is compatible with the balance valve fixing block 1 as an auxiliary tooling, connect the balance valve to the threaded hole 3 on the balance valve fixing block 1 through threaded connectors (such as bolts), assemble at least two balance valve fixing blocks 1 on the balance valve, adjust the position so that the mounting surfaces of each balance valve fixing block 1 are on the same reference plane, and complete the pre-positioning. Spot welding of balance valve fixing block: Place the pre-assembled balance valve fixing block 1 assembly in the preset installation position of the cylinder barrel, spot weld the connection between balance valve fixing block 1 and cylinder barrel, and remove the auxiliary tooling (balance valve) after spot welding is completed. Positioning and welding of oil passage block: The oil passage block 2 is positioned precisely with the positioning protrusion on the balance valve fixing block 1 by matching the positioning groove. Then, the connection between the oil passage block 2 and the cylinder barrel is fully welded to ensure the connection strength and sealing performance. Assembly Inspection: After welding is completed, check the assembly accuracy of the balance valve fixing block 1 and the oil passage block 2, the unobstructedness of the oil passage 4, and the quality of the welded parts. After confirming that there are no errors, install the balance valve in the mounting groove of the balance valve fixing block 1 to complete the assembly of the entire valve seat structure.

[0018] After installation, this combined valve seat structure can fully realize the functions of the original integral oil-passing valve seat, such as oil passage, connection of hydraulic system and hydraulic cylinder, and installation of balance valve. At the same time, it effectively reduces the amount of welding and the overall weight of the valve seat, and improves the operating accuracy of the hydraulic cylinder and production efficiency.

[0019] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A lightweight valve seat structure for hydraulic cylinders, characterized in that: It includes a balance valve fixing block and an oil passage block. The balance valve fixing block and the oil passage block are combined to form a valve seat structure adapted to the oil cylinder. The balance valve fixing block and the oil passage block are respectively welded to the oil cylinder. The balance valve fixing block is connected and fixed to the corresponding part of the oil cylinder by partial spot welding. The oil passage block is connected and fixed to the corresponding part of the oil cylinder by full welding.

2. The lightweight valve seat structure for a hydraulic cylinder according to claim 1, characterized in that: The balance valve fixing block is provided with threaded holes for cooperating with auxiliary tooling. The balance valve fixing block is connected to the auxiliary tooling through threaded connectors, so that the mounting surfaces of multiple balance valve fixing blocks are on the same reference plane.

3. The lightweight valve seat structure for a hydraulic cylinder according to claim 2, characterized in that: The auxiliary tooling is a balancing valve. The connection structure of the balancing valve is adapted to the threaded hole of the balancing valve fixing block. At least two balancing valve fixing blocks are pre-assembled by the balancing valve and then spot welded locally.

4. The lightweight valve seat structure for a hydraulic cylinder according to claim 1, characterized in that: The oil passage block is provided with an oil passage channel of the same specifications as the original integral oil passage valve seat. The position and diameter of the oil passage channel correspond to and match the oil port of the hydraulic cylinder and the connection port of the hydraulic system.

5. The lightweight valve seat structure for a hydraulic cylinder according to claim 1, characterized in that: A positioning structure is provided between the balance valve fixing block and the oil passage block. The positioning structure includes a positioning protrusion on the balance valve fixing block and a positioning groove on the oil passage block. The positioning protrusion and the positioning groove cooperate to achieve precise positioning and assembly of the balance valve fixing block and the oil passage block.

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