High-temperature-resistant high-performance hydraulic oil cylinder

Abstract

The invention discloses a high-temperature-resistant high-performance hydraulic oil cylinder which comprises an oil cylinder body, two oil nozzles, a sleeve rod, a piston, two plugging assemblies, a heat dissipation assembly, a cooling assembly and two warning assemblies. The piston can slide in the oil cylinder body, when the piston slides in the oil cylinder body, the piston can drive the piston rod to slide on the oil cylinder body, the piston slides in the oil cylinder body through hydraulic pressure, and the oil cylinder body conducts oil outlet and oil inlet through the two oil nozzles respectively. Through the plugging assembly, when the temperature of hydraulic oil rises to a threshold value, the fusing part of the plugging assembly is heated and fused, the pre-tightened elastic force part is released to slide downwards, a channel for the hydraulic oil to enter the oil cylinder is cut off, automatic interception of high-temperature oil is achieved, and work of the oil cylinder body is stopped by blocking heat source input; serious faults such as pipeline burst and element deformation of a hydraulic system caused by abnormal rise of internal pressure of the oil cylinder due to continuous entering of high-temperature oil are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic cylinders, and in particular to a high-temperature resistant and high-performance hydraulic cylinder. Background Art

[0002] In the field of industrial production, hydraulic cylinders serve as core actuators, converting hydraulic energy into mechanical energy. When used to achieve reciprocating motion, they can eliminate the need for a deceleration device, and there is no transmission gap, resulting in smooth movement. They are widely used in high-temperature operating scenarios such as construction machinery, injection molding, and metallurgical equipment.

[0003] In this regard, a buffered hydraulic cylinder disclosed in the patent publication number "CN118912059B" can block the piston rod and the cylinder body by setting a separation device, while reducing the damage to the cylinder body surface caused by the piston rod during the reset movement. Although it reduces the frequent collisions between the piston rod and the cylinder body during reciprocating movement to a certain extent, causing damage to the cylinder body close to the piston rod, affecting the normal use of the cylinder body, it improves the use efficiency and life of the cylinder body.

[0004] However, in actual use, with the development of equipment automation and high speed, the workload of the hydraulic system continues to increase. The hydraulic oil is prone to generate high temperature due to long-term circulation, which leads to aging of seals and thermal deformation of metal parts, and then causes leakage, inaccurate movement and other faults, which can easily cause sudden damage to the equipment and increase downtime maintenance costs.

[0005] Based on this, the present application proposes a high-temperature resistant and high-performance hydraulic cylinder. Summary of the Invention

[0006] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a high-temperature resistant and high-performance hydraulic cylinder.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions: A high-temperature resistant, high-performance hydraulic cylinder comprises a cylinder body, two oil nozzles, a sleeve rod, a piston, two blocking assemblies, a heat dissipation assembly, a cooling assembly, and two warning assemblies; the piston is capable of sliding within the cylinder body, and when the piston slides within the cylinder body, it can drive the piston rod to slide on the cylinder body. The piston slides within the cylinder body by hydraulic pressure, and the cylinder body is respectively supplied with and supplied with oil through two oil nozzles; The blocking component blocks the high-temperature hydraulic oil by sliding downward, thereby preventing the high-temperature hydraulic oil from entering the cylinder body; the heat dissipation component dissipates heat by allowing the high-temperature hydraulic oil to fully flow within a preset path; The cooling component forms a passage by sliding downward, discharges the high-temperature hydraulic oil in the cylinder body, and then discharges the residual heat in the cylinder body, thereby quickly cooling the cylinder body; the two warning components display high-temperature alarm information through sliding and rotating actions, thereby reminding staff that the hydraulic oil is at high temperature.

[0008] Preferably, the blocking assembly is provided between the oil nozzle and the oil cylinder body, and the blocking assembly is divided into a fusible portion and an elastic portion, and the fusible portion will melt when exposed to high temperature, thereby contacting the support for the elastic portion; When the fusible part melts, the elastic part releases the elastic kinetic energy, and the fusible part blocks the path of the hydraulic oil entering the oil cylinder body through a downward sliding action.

[0009] Preferably, the heat dissipation component is arranged between the two sealing components and consists of two switch parts and a heat dissipation pipe. After the elastic part works, the switch part slides and descends, so that the high-temperature hydraulic oil enters the heat dissipation pipe under the action of the hydraulic pump. After the hydraulic oil flows fully in the heat dissipation pipe, it enters the oil tank through the rotation of the switch part, and finally flows back and forth along the above-mentioned path, thereby fully dissipating heat.

[0010] Preferably, the two warning components are respectively arranged above the two blocking components, and the warning components are composed of a sliding rotating part and an information part. After the elastic part is operated, the sliding rotating part causes the information part to operate through a sliding and rotating action; After the sliding rotating part is working, the information part displays high temperature alarm information, thereby reminding the staff more intuitively.

[0011] Preferably, the cooling component is arranged in the oil cylinder body, and the cooling component consists of a ventilation part and an oil drain part. When the fuse part is initially melted, the oil drain part slides downward to form a passage, thereby allowing the high-temperature hydraulic oil in the oil cylinder body to be discharged. When the fuse part is completely melted, the passage will expand to enable the hydraulic oil to be discharged faster. When the oil drain portion expands the passage, the ventilation portion opens the sealed space in the cylinder body through a rotation action, allowing outside air to enter the cylinder body for heat exchange, thereby fully cooling the cylinder body and preventing the internal seals of the cylinder body from being damaged by high temperature.

[0012] Preferably, the sliding stroke of the piston is between the two blocking components to prevent the piston from touching the components on both sides of the cylinder body. The blocking components can be disassembled and installed by screws, nuts, etc., which facilitates the installation of the fuse block.

[0013] The present invention has the following beneficial effects: Through the sealing component, when the hydraulic oil temperature rises to the threshold, the fuse part of the sealing component is melted by the heat, and the pre-tightened elastic part is released to slide downward, cutting off the channel for the hydraulic oil to enter the cylinder, thereby realizing automatic interception of high-temperature oil. By blocking the input of the heat source, the operation of the cylinder body is stopped, avoiding the continuous entry of high-temperature oil, which causes the internal pressure of the cylinder to increase abnormally, causing serious faults such as hydraulic system pipeline rupture and component deformation.

[0014] Through the heat dissipation component, when the sealing component is started, the switch part of the heat dissipation component drops synchronously, connecting the preset heat dissipation oil circuit, and the hydraulic pump drives the high-temperature oil to flow through the preset path. By increasing the fluid path, the heat exchange efficiency between the oil and the outside world is enhanced. Through continuous circulation and cooling, the high-temperature oil can be cooled to prevent the viscosity drop and lubrication performance deterioration caused by excessively high oil temperature, and maintain the system pressure stability and the action accuracy of the actuator.

[0015] Through the warning component, when the elastic part works, it will trigger the sliding rotating part of the warning component, driving the information part to rotate and display the high temperature warning sign, ensuring that the operator can promptly detect temperature abnormalities through intuitive visual signals, take shutdown maintenance or cooling measures, avoid irreversible damage to the equipment due to continuous high temperature, and reduce maintenance costs and downtime.

[0016] Through the cooling component, when the fuse part begins to melt, the oil drain part first slides down to form a tiny passage, slowly discharging the high-temperature oil; after it is completely melted, the ventilation part rotates to open the sealed cavity, introducing external cold air to form convection, and uses air convection to carry away heat, achieving rapid cooling, effectively preventing the seal failure caused by overheating expansion of the seals inside the cylinder body, and at the same time avoiding deformation of metal parts due to thermal stress, ensuring the sealing and structural integrity of the cylinder in extreme temperature environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of a high-temperature resistant and high-performance hydraulic cylinder proposed by the present invention; Figure 2 This is an internal cross-sectional view of the cylinder body, valve chamber and oil unloading chamber of a high-temperature resistant and high-performance hydraulic cylinder proposed by the present invention; Figure 3 This is an internal cross-sectional view of a high-temperature resistant and high-performance hydraulic cylinder valve chamber proposed by the present invention; Figure 4 This is a schematic diagram of the connection structure of high-temperature resistant and high-performance hydraulic cylinder baffle, plug head, connecting rod and other components proposed by the present invention; Figure 5 This is a schematic diagram of the connection structure of a high-temperature resistant and high-performance hydraulic cylinder warning assembly proposed by the present invention; Figure 6This is a schematic diagram of the connection structure of a high-temperature resistant and high-performance hydraulic cylinder mounting block, a special-shaped plate and a rubber plug proposed by the present invention; Figure 7 This is a cross-sectional plan view of the cylinder body of a high-temperature resistant and high-performance hydraulic cylinder proposed by the present invention.

[0018] In the figure: 1. Cylinder body; 2. Piston rod; 3. Valve chamber; 4. Oil nozzle; 5. Heat dissipation pipe; 6. Oil unloading chamber; 7. Alarm plate; 8. Mounting seat; 9. Heat dissipation hole; 10. Special-shaped plate; 11. Connecting rod; 12. Piston; 13. Plug; 14. Spring; 15. Sleeve; 16. Baffle; 17. Slide rail; 18. Mounting frame; 19. Fuse block; 20. Block; 21. Pressure plate; 22. Sleeve rod; 23. Support rod; 24. Round rod; 25. Mounting block; 26. Gear; 27. Rack; 28. Lifting rod; 29. ​​Rubber plug; 30. Connecting plate. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Example 1:

[0020] Reference Figure 1-4 A high-temperature resistant and high-performance hydraulic cylinder includes a cylinder body 1, two oil nozzles 4, a sleeve rod 22, a piston 12, two blocking components, a heat dissipation component, a cooling component, and two warning components; the piston 12 can slide in the cylinder body 1. When the piston 12 slides in the cylinder body 1, it can drive the piston rod 2 to slide on the cylinder body 1. The piston 12 slides in the cylinder body 1 by hydraulic pressure. The oil nozzle 4 is used to connect the oil circuit of the hydraulic pump. The cylinder body 1 is respectively discharged and inletted with oil through the two oil nozzles 4; The blocking component blocks the high-temperature hydraulic oil by sliding downward, thereby preventing it from entering the cylinder body 1; the heat dissipation component dissipates heat by allowing the high-temperature hydraulic oil to fully flow within a preset path; The cooling component forms a passage by sliding downward, discharges the high-temperature hydraulic oil in the cylinder body 1, and then discharges the residual heat in the cylinder body 1, quickly cooling the cylinder body 1; the two warning components display high-temperature alarm information through sliding and rotating actions, thereby reminding the staff that the hydraulic oil is at high temperature.

[0021] The plugging assembly is provided between the oil nozzle 4 and the oil cylinder body 1. The plugging assembly is divided into a fusible part and an elastic part. The fusible part will melt when it encounters high temperature, thereby contacting the support of the elastic part. When the fusible part melts, the elastic part releases the elastic kinetic energy, and the fusible part blocks the path of the hydraulic oil entering the cylinder body 1 by sliding downward.

[0022] In this embodiment, refer to Figures 1-4 The blocking component can be implemented in the following specific structures: The plugging assembly is divided into a fuse part and an elastic part. The elastic part consists of a valve chamber 3, two springs 14 and a sleeve 15. The valve chamber 3 is connected between the oil nozzle 4 and the cylinder body 1. The two sleeves 15 are fixed to the inner wall above the valve chamber 3. The two springs 14 are fixed to the inner wall above the valve chamber 3. The fuse part consists of a blocking block 20, a pressure plate 21, two fuse blocks 19 and two sleeve rods 22. The two sleeve rods 22 are respectively sleeved in the two sleeves 15. The pressure plate 21 is fixed below the two sleeve rods 22. One end of the two fuse blocks 19 is inserted into the inner wall below the valve chamber 3, and the other end is fixed below the pressure plate 21. The two fuse blocks 19 are both made of The melting point of the lead-tin alloy is 100-150℃. The pressure plate 21 and the sleeve rod 22 compress the spring 14 in the sleeve 15 through the supporting force of the fuse block 19. The block 20 is fixed under the pressure plate 21. In this way, when the hydraulic oil temperature is too high, the fuse block 19 can be melted, thereby releasing the compression of the spring 14. Under the action of the elastic force of the spring 14, the pressure plate 21 drives the block 20 downward to block the connection between the valve cavity 3 and the cylinder body 1, thereby stopping the operation of the cylinder body 1, avoiding the continuous entry of high-temperature oil, causing the internal pressure of the cylinder to increase abnormally, causing serious faults such as hydraulic system pipeline rupture and component deformation. Example 2:

[0023] The difference from the first embodiment is that, referring to Figure 1 - Figure 5 , this embodiment also has the following further contents: The heat dissipation component is arranged between the two blocking components and consists of two switch parts and a heat dissipation pipe 5. After the elastic part works, the switch part slides down to allow the high-temperature hydraulic oil to enter the heat dissipation pipe 5 under the action of the hydraulic pump. After the hydraulic oil fully flows in the heat dissipation pipe 5, it enters the oil tank through the rotation of the switch part, and finally flows back and forth along the above path, thereby fully dissipating heat.

[0024] The two warning components are respectively arranged above the two blocking components. The warning components are composed of a sliding rotating part and an information part. After the sliding rotating part works, the information part works through the sliding and rotating action. After the sliding and rotating part works, the information department displays high temperature alarm information to remind the staff more intuitively.

[0025] In this embodiment, refer to Figures 1-4 The specific structural implementation scheme of the heat dissipation component is as follows: The heat dissipation assembly consists of a switch part and a heat dissipation pipe 5. The switch part consists of a baffle 16, a slide rail 17 and a mounting bracket 18. The slide rail 17 is fixedly connected to the inner wall of the valve chamber 3. The mounting bracket 18 can slide on the slide rail 17. The mounting bracket 18 is fixed on the pressure plate 21. The baffle 16 can rotate on the mounting bracket 18. A torsion spring is provided at the connection between the baffle 16 and the mounting bracket 18. In this way, when there is no external force, the baffle 16 can be close to the inner wall of the valve chamber 3 under the action of the torsion spring. The two ends of the heat dissipation pipe 5 are respectively connected to the two valve chambers 3. When the sealing assembly blocks the connection between the valve chamber 3 and the cylinder body 1 downward, it can drive the mounting bracket 18 and the baffle 16 to descend, so that the connection between the heat dissipation pipe 5 and the valve chamber 3 is opened, and the high-temperature hydraulic oil will flow to the heat dissipation pipe under the pressure of the hydraulic pump. 5, by flowing in the heat dissipation pipe 5, the heat exchange efficiency between the oil and the outside is enhanced, so that the oil temperature can be reduced. At the same time, when the hydraulic oil flows into the valve chamber 3 on the other side, under the pressure of the hydraulic pump, the baffle 16 will be pushed to rotate inward, so that the connection between the other end of the heat dissipation pipe 5 and the valve chamber 3 is opened, and the hydraulic oil enters the valve chamber 3 on the other side. Due to the action of the hydraulic system reversing valve, there is no pressure in the oil nozzle 4 and the valve chamber 3 on the other side. Therefore, under the continuous pressure of the hydraulic pump, the hydraulic oil enters the oil nozzle 4 through the valve chamber 3 on the other side, and then flows back into the oil tank. In this way, the high-temperature hydraulic oil can be circulated back and forth to cool down, preventing the viscosity drop and lubrication performance deterioration caused by excessive oil temperature, and maintaining the system pressure stability and the action accuracy of the actuator.

[0026] Reference Figure 5 , the warning component can be implemented as follows: The warning component is composed of a sliding rotating part and an information part. The rotating sliding part is composed of a mounting seat 8, a support rod 23, a gear 26 and a rack 27. The support rod 23 can slide on the valve cavity 3. The connection between the support rod 23 and the valve cavity 3 is sealed to prevent oil leakage. When the mounting frame 18 slides downward, it can drive the support rod 23 to slide downward. When the support rod 23 slides downward, it can drive the rack 27 to slide downward. The mounting seat 8 is fixed on the valve cavity 3, the rack 27 can slide on the mounting seat 8, and the gear 26 can rotate on the mounting seat 8. When the rack 27 slides, it can drive the gear 26 to rotate. When the gear 26 rotates, it can It is enough to make the information department work. The information department consists of an alarm board 7 and a lifting rod 28. The alarm board 7 is fixed at one end of the lifting rod 28, and the lifting rod 28 is fixed at the center of the gear 26. When the gear 26 rotates, it can drive the lifting rod 28 and the alarm board 7 to rotate. In this way, when the blocking component descends, it can drive the rack 27 to slide downward through the support rod 23, so that the gear 26 drives the lifting rod 28 to rotate, and the alarm board 7 rotates and stands up, displaying a high temperature warning sign, ensuring that the operator can detect temperature abnormalities in time through intuitive visual signals, and take shutdown inspection or cooling measures to avoid irreversible damage to the equipment due to continuous high temperature, thereby reducing maintenance costs and downtime. Example 3:

[0027] Reference Figure 1 、 Figure 2 、 Figure 4 、 Figure 6 and Figure 7 Compared with the first and second embodiments, in this embodiment: The cooling component is arranged in the oil cylinder body 1. The cooling component consists of a ventilation part and an oil drain part. When the fuse part is initially melted, the oil drain part slides downward to form a passage, thereby allowing the high-temperature hydraulic oil in the oil cylinder body 1 to be discharged. When the fuse part is completely melted, the passage will expand to enable the hydraulic oil to be discharged faster. When the ventilation part expands the passage in the oil drain part, it opens the sealed space in the cylinder body 1 through a rotating action, allowing outside air to enter the cylinder body 1 for heat exchange, so that the cylinder body 1 is fully cooled and the internal seals of the cylinder body 1 are prevented from being damaged by high temperature.

[0028] The sliding stroke of the piston 12 is between the two blocking components, preventing the piston 12 from touching the components on both sides of the cylinder body 1. The blocking components can be disassembled and installed by screws, nuts, etc., which facilitates the installation of the fuse block 19.

[0029] In this embodiment, refer to Figure 1 、 Figure 2 、 Figure 4 、 Figure 6 and Figure 7 The cooling component can be implemented in the following specific structures: The cooling assembly consists of a ventilation part and an oil drain part. The oil drain part consists of an oil unloading chamber 6, a round rod 24, a connecting plate 30, two connecting rods 11 and two plugs 13. The oil unloading chamber 6 is fixed below the cylinder body 1. An opening is provided on the oil unloading chamber 6 to connect with the cylinder body 1. The connecting plate 30 is fixed below the round rod 24. The two connecting rods 11 are fixed below the connecting plate 30. The two plugs 13 are fixed below the two connecting rods 11 respectively. The plug 13 blocks the connection between the oil unloading chamber 6 and the cylinder body 1 to prevent the hydraulic oil from leaking into the oil unloading chamber 6 during normal operation. When the fuse block 19 is initially melted and the blocking block 20 slides downward , which can drive the round rod 24, the connecting plate 30, the two connecting rods 11 and the two plugs 13 to slide downward, so that the two plugs 13 enter the oil unloading chamber 6 downward, so that the hydraulic oil in the cylinder body 1 passes through the gap between the plug 13 and the oil unloading chamber 6 and the cylinder body 1, and enters the oil unloading chamber 6. The ventilation part is composed of two groups of mounting blocks 25, two groups of heat dissipation holes 9, two special-shaped plates 10 and a number of rubber plugs 29. The two groups of mounting blocks 25 are respectively fixed to the inner walls on both sides of the cylinder body 1, and the several rubber plugs 29 are respectively fixed on the two special-shaped plates 10. The two groups of heat dissipation holes 9 are respectively provided on both sides of the cylinder body 1. If A rubber plug 29 blocks the two groups of heat dissipation holes 9, and the two special-shaped plates 10 can rotate on the two groups of mounting blocks 25 respectively. A torsion spring is provided at the connection between the mounting block 25 and the special-shaped plate 10. In this way, when there is no external force, the special-shaped plate 10 can be tightly attached to the inner wall of the cylinder body 1 under the action of the torsion spring, thereby preventing the hydraulic oil from leaking from the heat dissipation holes 9. In this way, when the fuse block 19 is completely melted, the round rod 24 will drive the connecting plate 30 to continue to descend. At this time, the gap at the connection between the plug 13 and the oil unloading chamber 6 and the cylinder body 1 will continue to expand. At the same time, the connecting plate 30 will drive the special-shaped plate 10 to press downward, thereby making the special-shaped plate 10 When rotating on the mounting block 25, the rubber plug 29 moves away from the heat dissipation hole 9 under the rotation of the special-shaped plate 10, thereby releasing the blockage of the heat dissipation hole 9 and allowing the outside cold air to enter to realize air circulation. Since the oil drain part has previously discharged a part of the oil in the cylinder body 1, when the heat dissipation hole 9 is opened, the hydraulic oil will not leak from the heat dissipation hole 9. The heat in the cylinder body 1 is taken away by air convection, realizing rapid cooling, effectively preventing the sealing failure of the seal inside the cylinder body 1 due to overheating expansion, and at the same time avoiding deformation of metal parts due to thermal stress, thereby ensuring the sealing and structural integrity of the cylinder in extreme temperature environments.

[0030] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A high-temperature resistant and high-performance hydraulic cylinder, characterized in that: The invention comprises an oil cylinder body (1), two oil nozzles (4), a sleeve rod (22), a piston (12), two blocking components, a heat dissipation component, a cooling component and two warning components; the piston (12) can slide in the oil cylinder body (1); when the piston (12) slides in the oil cylinder body (1), it can drive the piston rod (2) to slide on the oil cylinder body (1); the piston (12) slides in the oil cylinder body (1) by hydraulic pressure; the oil cylinder body (1) discharges and inlets oil respectively through the two oil nozzles (4); The blocking component blocks the high-temperature hydraulic oil by sliding downward, thereby preventing the high-temperature hydraulic oil from entering the oil cylinder body (1); the heat dissipation component dissipates heat by allowing the high-temperature hydraulic oil to fully flow within a preset path; The cooling component forms a passage by sliding downward, discharges the high-temperature hydraulic oil in the cylinder body (1), and then discharges the residual heat in the cylinder body (1), thereby quickly cooling the cylinder body (1); the two warning components display high-temperature alarm information by sliding and rotating, thereby reminding the staff of the high temperature of the hydraulic oil.

2. A high-temperature resistant and high-performance hydraulic cylinder according to claim 1, characterized in that: The blocking component is arranged between the oil nozzle (4) and the oil cylinder body (1), and is divided into a fuse part and an elastic part. The fuse part will melt when exposed to high temperature, thereby releasing the support for the elastic part. When the fusible part melts, the elastic part releases elastic kinetic energy, and the fusible part blocks the path of the hydraulic oil entering the oil cylinder body (1) by sliding downward.

3. A high-temperature resistant and high-performance hydraulic cylinder according to claim 2, characterized in that: The heat dissipation component is arranged between the two blocking components and is composed of two switch parts and a heat dissipation pipe (5). After the elastic part is operated, the switch part slides down to allow the high-temperature hydraulic oil to enter the heat dissipation pipe (5) under the action of the hydraulic pump. After the hydraulic oil fully flows in the heat dissipation pipe (5), it enters the oil tank through the rotation of the switch part and finally flows back and forth along the above-mentioned path, thereby achieving sufficient heat dissipation.

4. A high-temperature resistant and high-performance hydraulic cylinder according to claim 2, characterized in that: The two warning components are respectively arranged above the two blocking components. The warning components are composed of a sliding rotating part and an information part. After the elastic part works, the sliding rotating part makes the information part work through the sliding and rotating action. After the sliding rotating part is working, the information part displays high temperature alarm information, thereby reminding the staff more intuitively.

5. The high-temperature resistant and high-performance hydraulic cylinder according to claim 2, characterized in that: The cooling component is arranged in the oil cylinder body (1), and the cooling component consists of a ventilation part and an oil drain part. When the fuse part is initially melted, the oil drain part slides downward to form a passage, thereby allowing the high-temperature hydraulic oil in the oil cylinder body (1) to be discharged. When the fuse part is completely melted, the passage will expand so that the hydraulic oil can be discharged faster. When the ventilation part expands the passage of the oil drain part, the ventilation part opens the sealed space in the oil cylinder body (1) through a rotating action, allowing outside air to enter the interior of the oil cylinder body (1) for heat exchange, so that the interior of the oil cylinder body (1) is fully cooled, thereby preventing the internal sealing components of the oil cylinder body (1) from being damaged due to high temperature.

6. The high-temperature resistant and high-performance hydraulic cylinder according to claim 2, characterized in that: The sliding stroke of the piston (12) is between the two blocking components, preventing the piston (12) from touching the components on both sides of the cylinder body (1). The blocking components can be disassembled and installed by screws, nuts, etc., facilitating the installation of the fuse block (19).

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