Water cooled oil cylinder

Abstract

The utility model discloses a water -cooled oil cylinder relates to oil cylinder technical field, include: cylinder body and the piston rod of sliding in the inside of cylinder body, cylinder body outer wall is equipped with cooling water tank, and the both ends of cooling water tank are equipped with tank water inlet and tank water outlet respectively, and a plurality of fan -shaped distribution's heat conduction fin are equipped in cooling water tank, and the both ends of cooling water tank all are provided with the through -going mouth, and two through -going mouths are provided with oil cylinder small cavity hydraulic oil joint and oil cylinder big cavity hydraulic oil joint respectively in all, and the inside of piston rod is provided with cooling chamber and is provided with the baffle in cooling chamber, and the end of piston rod is provided with the rod body water inlet and rod body water outlet, the utility model discloses setting up circulating water cooling water tank in the outside of oil cylinder cylinder body, and the heat conduction fin is set up to increase cylinder body heat dissipation area in auxiliary, and the circulating water cooling chamber is seted up in the inside of piston rod, so that the heat of oil cylinder can be taken away fully by circulating coolant, thereby realizes the quick heat dissipation.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinders, and more particularly to a water-cooled hydraulic cylinder. Background Technology

[0002] With the development of industrial technology, hydraulic cylinders, as a common actuator, are widely used in various industrial equipment, especially in high-temperature environments such as steel smelting and mining. Under these harsh working conditions, the cylinders often need to withstand the test of high temperatures, especially in the working environment of steel plants where excavators are used to remove high-temperature slag. The high temperature of the slag directly heats the cylinder, causing the cylinder temperature to rise sharply.

[0003] However, existing water-cooled cylinder technology still has some shortcomings: on the one hand, the existing cooling structure design is relatively simple, with limited cooling efficiency, making it difficult to meet the heat dissipation requirements under extreme high-temperature environments; on the other hand, the contact area between the coolant and the cylinder or piston rod is insufficient, resulting in low heat exchange efficiency. Especially under high-temperature conditions such as slag removal in steel plants, the existing water-cooling structure is unable to effectively cope with the instantaneous high-temperature impact, causing the internal temperature of the cylinder to remain too high, and the rubber seals still face the risk of failure. In addition, the existing technology lacks optimized design of the internal cooling structure of the piston rod, as well as consideration for fire and dust protection of the cylinder exterior, resulting in an overall less than ideal heat dissipation effect and protection performance.

[0004] Therefore, there is an urgent need for a water-cooled oil cylinder with higher cooling efficiency and better protection performance to solve the technical problem of oil cylinder temperature being too high in high-temperature environments, leading to seal failure and oil leakage. Utility Model Content

[0005] The present invention aims to solve one of the problems existing in the background art. To this end, the present invention provides a water-cooled oil cylinder.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A water-cooled oil cylinder, comprising,

[0008] Cylinder block and piston rod sliding inside the cylinder block;

[0009] A cooling water tank is installed on the outer wall of the cylinder. The cooling water tank has an inlet and an outlet at both ends. The cooling water tank contains multiple heat-conducting fins arranged in a fan shape.

[0010] Both ends of the cooling water tank are provided with through ports, and the two through ports are respectively provided with hydraulic oil connectors for the small chamber of the cylinder and hydraulic oil connectors for the large chamber of the cylinder to communicate with the cylinder body.

[0011] The piston rod has a cooling chamber inside and a baffle plate inside. The end of the piston rod has a rod inlet and a rod outlet.

[0012] Furthermore, the width of the heat-conducting fin is smaller than the depth of the cooling water tank, and one side of the heat-conducting fin is welded to the inner wall of the cooling water tank near the cylinder block.

[0013] Furthermore, the width of the heat-conducting fin is equal to the depth of the cooling water tank, and the two sides of the heat-conducting fin are welded to the inner walls of the two sides of the cooling water tank, respectively.

[0014] Furthermore, the heat-conducting sheet is made of copper.

[0015] Furthermore, a fireproof cloth cover is fitted over the outer periphery of the cooling water tank, and the fireproof cloth cover is fastened to the end of the cooling water tank by a clamp.

[0016] Furthermore, a foldable fireproof dust cover is provided between the end of the piston rod and the end of the cylinder. The fireproof dust cover is fastened by a clamp to protect the protruding part of the piston rod.

[0017] Furthermore, the clamp is a hose clamp.

[0018] Furthermore, the partition extends into the cooling chamber and divides it into an upper chamber and a lower chamber that are connected at only one end. The connection between the partition and the cooling chamber is fixed with sealant.

[0019] Furthermore, the cooling water tank is fitted outside the cylinder block and its ends are fixed to the cylinder block by brazing.

[0020] Furthermore, the outer wall of the piston rod is provided with multiple high-temperature resistant sealing rings.

[0021] In summary, the beneficial technical effects of this utility model are as follows:

[0022] (1) By setting a cooling water tank outside the cylinder body, the cooling water tank plays an isolation role. The cooling water tank is equipped with fan-shaped heat-conducting fins, which increases the contact area between the coolant and the heat-conducting fins, so that the cooling water tank can fully remove the heat of the cylinder body by the coolant.

[0023] (2) By opening a cooling chamber inside the piston rod and setting a baffle to form a circulation channel, the coolant can circulate through the inside of the piston rod, effectively removing heat;

[0024] (3) By setting up fireproof cloth covers and fireproof cloth dust covers, the speed at which external high-temperature heat is transferred to the oil cylinder is effectively slowed down;

[0025] (4) The application of high temperature resistant sealing rings further improves the high temperature resistance of the cylinder itself. Attached Figure Description

[0026] Figure 1 This is a schematic axial cross-section of Embodiment 1. Figure 1 ;

[0027] Figure 2 This is a schematic axial cross-section of Embodiment 1. Figure 2 ;

[0028] Figure 3 This is a radial cross-sectional schematic diagram of Embodiment 1;

[0029] Figure 4 This is a radial cross-sectional schematic diagram of Embodiment 2.

[0030] Reference numerals: 1. Cylinder body; 2. Piston rod; 21. Rod inlet; 22. Rod outlet; 3. Cooling water tank; 31. Tank inlet; 32. Tank outlet; 4. Heat-conducting fin; 6. Hydraulic oil connector for small cylinder chamber; 7. Hydraulic oil connector for large cylinder chamber; 8. Cooling chamber; 81. Upper chamber; 82. Lower chamber; 9. Partition; 10. Fireproof cloth cover; 11. Fireproof cloth dust cover; 12. Clamping device; 13. High-temperature resistant sealing ring. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0032] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "depth," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," 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. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example

[0034] Reference Figure 1 and Figure 2 A water-cooled hydraulic cylinder includes a cylinder body 1 and a piston rod 2 that slides inside the cylinder body 1. The cylinder body 1 has a cylindrical cavity with a precision-machined inner wall and a high surface smoothness to ensure low resistance and good sealing when the piston rod 2 slides within it. One end of the piston rod 2 is connected to a piston, which is equipped with multiple high-temperature resistant sealing rings 13 to ensure the cylinder's sealing performance. The other end of the piston rod 2 extends outside the cylinder body 1 for connecting to an external load.

[0035] Reference Figure 1 , Figure 2 and Figure 3A cooling water tank 3 is installed on the outer wall of the cylinder block 1. The cooling water tank 3 is cylindrical, with its inner diameter equal to the outer diameter of the cylinder block 1. The cooling water tank 3 is fitted onto the outside of the cylinder block 1, and its ends are fixed to the cylinder block 1 by brazing. The cooling water tank 3 has a tank inlet 31 and a tank outlet 32 ​​at its two ends, with the tank inlet 31 located at the end of the cylinder block 1 furthest from its opening. The tank inlet 31 is used to connect to an external coolant source, and the tank outlet 32 ​​is used to discharge the coolant that has absorbed heat. The coolant can be water or other cooling media. Multiple heat-conducting fins 4 are installed inside the cooling water tank 3. These fins are aligned with the cylinder block axis and arranged in a fan shape. The length of each heat-conducting fin 4 is shorter than the length of the cooling water tank 3, and its ends do not directly touch the ends of the cooling water tank 3. The heat-conducting fins 4 increase the contact area between the coolant and the inner wall of the cooling water tank 3, improving heat exchange efficiency. The width of the heat-conducting fin 4 is smaller than the depth of the coolant tank 3 (depth refers to the minimum distance between the outer and inner walls of the coolant tank 3 in its radial direction). One side of the heat-conducting fin 4 is welded to the inner wall of the coolant tank 3 near the cylinder block 1. The presence of the heat-conducting fin 4 divides the coolant tank 3 into multiple zones, extending the flow path and residence time of the coolant within the coolant tank 3, further improving heat exchange efficiency. The size of the heat-conducting fin 4 is narrower than the depth of the coolant tank 3, therefore it does not completely obstruct the flow of coolant, allowing for rapid discharge even under increased coolant pressure. This design ensures that the heat-conducting fin 4 can fully contact the coolant while minimizing flow obstruction within the coolant tank 3. The heat-conducting fin 4 is made of copper, which has excellent thermal conductivity, enabling rapid transfer of heat generated by the cylinder block 1 to the coolant, thus improving heat dissipation efficiency.

[0036] Both ends of the cooling water tank 3 are provided with through ports, the diameter of which is smaller than the diameter of the cooling water tank 3. The positions of the through ports correspond to the oil ports on the cylinder body 1. A small cylinder hydraulic oil connector 6 and a large cylinder hydraulic oil connector 7 are respectively inserted into the two through ports. The small cylinder hydraulic oil connector 6 and the large cylinder hydraulic oil connector 7 communicate with the small and large chambers inside the cylinder body 1, respectively, for connecting to an external hydraulic system to allow hydraulic oil to enter and exit.

[0037] A fireproof cloth cover 10 is fitted over the outer periphery of the cooling water tank 3. The fireproof cloth cover 10 is made of high-temperature resistant material, protecting the cooling water tank 3 in high-temperature environments. The fireproof cloth cover 10 is secured to the end of the cooling water tank 3 by clamps 12, which are hose clamps. The hose clamps are made of stainless steel, possessing good corrosion resistance and strength, and can firmly fix the fireproof cloth cover 10. The fireproof cloth cover 10 is made of high-temperature resistant fiber material, capable of withstanding temperatures above 600℃ without burning, effectively protecting the cooling water tank 3 from the effects of external high-temperature environments. The depth of the fireproof cloth cover 10 is 2-3 mm, providing sufficient heat insulation without adding excessive volume and weight. The surface of the fireproof cloth cover 10 undergoes special treatment, providing waterproof, oil-proof, and dustproof functions, extending its service life.

[0038] A cooling chamber 8 is formed inside the piston rod 2. The cooling chamber 8 is a cylindrical cavity and is coaxially arranged with the piston rod 2. A partition 9 is installed inside the cooling chamber 8, extending into the cooling chamber 8 and dividing it into an upper chamber 81 and a lower chamber 82 connected at only one end. The length of the partition 9 is slightly shorter than the length of the cooling chamber 8, leaving space at one end of the cooling chamber 8 so that the upper chamber 81 and the lower chamber 82 can communicate at that end. The connection between the partition 9 and the cooling chamber 8 is fixed with sealant to ensure the airtightness between the upper chamber 81 and the lower chamber 82 and prevent short-circuit flow of coolant. The connected upper chamber 81 and lower chamber 82 form a circulation channel for coolant, allowing coolant to circulate between the upper chamber 81 and the lower chamber 82, improving the cooling effect. The piston rod 2 has a rod inlet 21 and a rod outlet 22 at its end. The rod inlet 21 is used to connect to external coolant, and the rod outlet 22 is used to discharge coolant that has absorbed heat.

[0039] A fireproof cloth dust cover 11 is installed between the end of the piston rod 2 and the end of the cylinder 1. The fireproof cloth dust cover 11 has a foldable telescopic section and can be extended according to the extension of the piston rod 2. The fireproof cloth dust cover 11 can prevent external dust and impurities from entering the interior of the cylinder 1, while protecting the piston rod 2 and the cylinder 1 in high-temperature environments. The fireproof cloth dust cover 11 is fastened by a clamp 12 to protect the extended part of the piston rod 2. The clamp 12 of the fireproof cloth dust cover 11 is also a hose clamp to ensure the fireproof cloth dust cover 11 is firmly fixed. The hose clamp adopts a spiral adjustment structure, which can adjust the tightness as needed, making it convenient for installation and disassembly. The fireproof cloth dust cover 11 is made of high-temperature resistant fiber material, which can withstand temperatures above 600℃ without burning, effectively protecting the piston rod 2 and the cylinder 1 from the effects of external high-temperature environments. The depth of the fireproof cloth dust cover 11 is 2-3 mm, which provides sufficient heat insulation protection without adding excessive volume and weight. The surface of the fireproof cloth dust cover 11 has undergone special treatment, giving it waterproof, oil-proof, and dustproof functions, thus extending its service life.

[0040] The inlet 31 and outlet 32 ​​of the cooling water tank 3, and the inlet 21 and outlet 22 of the piston rod 2 are all connected to the external cooling system through pipelines. The cooling system is equipped with two DC electric pumps to force the coolant to circulate between the cylinder and the cooler, so as to achieve the purpose of cooling the cylinder.

[0041] The working principle of the water-cooled hydraulic cylinder is as follows: When the hydraulic system supplies hydraulic oil to the large or small chamber of the cylinder, the piston rod 2 extends or retracts under the pressure of the hydraulic oil, achieving linear motion. During operation, the temperature of the hydraulic oil rises and is transferred to the coolant in the cooling water tank 3 through the cylinder body 1. The coolant enters the cooling water tank 3 through the tank inlet 31, flows along multiple channels separated by heat-conducting plates 4, absorbs heat, and is discharged from the tank outlet 32. Simultaneously, the coolant enters the cooling chamber 8 inside the piston rod 2 through the rod inlet 21, forms a circulation flow under the guidance of the baffle 9, absorbs the heat generated by the piston rod 2, and is discharged from the rod outlet 22. This dual cooling method effectively reduces the operating temperature of the cylinder, improving its working efficiency and service life. Additionally, the fireproof cloth cover 10 and the fireproof dust cover 11 provide isolation. Example

[0042] Reference Figure 4 Unlike Embodiment 1, in this embodiment, the width of the heat-conducting plate 4 is equal to the depth of the cooling water tank 3, and the two sides of the heat-conducting plate 4 are welded to the inner walls of the two sides of the cooling water tank 3. This design allows the heat-conducting plate 4 to completely divide the interior of the cooling water tank 3 into multiple flow channels. The coolant must flow within these channels, extending the flow path and residence time of the coolant within the cooling water tank 3, further improving heat exchange efficiency. The heat-conducting plate 4 is also made of copper, which has excellent thermal conductivity.

[0043] The heat-conducting fins 4 are welded firmly and reliably to the inner walls of both sides of the cooling water tank 3, ensuring that they will not loosen or fall off during long-term use. They also provide structural support for the cooling water tank 3 as a whole, increasing its strength.

[0044] The other structures are the same as in Embodiment 1, and will not be described again here.

[0045] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined by the scope of the claims.

Claims

1. A water-cooled oil cylinder, characterized in that, include: Cylinder (1) and piston rod (2) sliding inside cylinder (1); A cooling water tank (3) is installed on the outer wall of the cylinder (1). The two ends of the cooling water tank (3) are respectively provided with a tank inlet (31) and a tank outlet (32). Multiple heat-conducting fins (4) are arranged in a fan shape inside the cooling water tank (3). Both ends of the cooling water tank (3) are provided with through ports, and the two through ports are respectively provided with hydraulic oil connectors (6) for communicating with the cylinder body (1) and hydraulic oil connectors (7) for communicating with the cylinder body (1). The piston rod (2) has a cooling chamber (8) inside and a partition (9) is provided inside the cooling chamber (8). The piston rod (2) has a rod inlet (21) and a rod outlet (22) at its end.

2. The water-cooled oil cylinder according to claim 1, characterized in that, The width of the heat-conducting plate (4) is less than the depth of the cooling water tank (3), and one side of the heat-conducting plate (4) is welded to the inner wall of the cooling water tank (3) near the cylinder (1).

3. The water-cooled oil cylinder according to claim 1, characterized in that, The width of the heat-conducting plate (4) is equal to the depth of the cooling water tank (3), and the two sides of the heat-conducting plate (4) are welded to the inner walls of the two sides of the cooling water tank (3).

4. The water-cooled oil cylinder according to claim 2 or 3, characterized in that, The heat-conducting sheet (4) is made of copper.

5. The water-cooled oil cylinder according to claim 1, characterized in that, A fireproof cloth cover (10) is fitted on the outer periphery of the cooling water tank (3), and the fireproof cloth cover (10) is fastened to the end of the cooling water tank (3) by a clamp (12).

6. The water-cooled oil cylinder according to claim 1, characterized in that, A foldable fireproof cloth dust cover (11) is provided between the end of the piston rod (2) and the end of the cylinder (1). The fireproof cloth dust cover (11) is fastened by a clamp (12) to protect the protruding part of the piston rod (2).

7. The water-cooled oil cylinder according to claim 5 or 6, characterized in that, The clamp (12) is a hose clamp.

8. The water-cooled oil cylinder according to claim 1, characterized in that, The partition (9) extends into the cooling chamber (8) and divides it into an upper chamber (81) and a lower chamber (82) connected at only one end. The connection between the partition (9) and the cooling chamber (8) is fixed with sealant.

9. The water-cooled oil cylinder according to claim 1, characterized in that, The cooling water tank (3) is fitted outside the cylinder body (1) and its end is fixed to the cylinder body (1) by brazing.

10. The water-cooled oil cylinder according to claim 1, characterized in that, The outer wall of the piston rod (2) is provided with multiple high-temperature resistant sealing rings (13).

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