Explosion-proof hydraulic cylinder

Abstract

The utility model relates to the technical field of oil cylinders, and discloses an anti-explosion hydraulic cylinder which comprises an oil cylinder outer barrel, an oil cylinder piston is movably arranged in the oil cylinder outer barrel in a sleeved mode, and an oil cylinder inner rod is fixedly arranged in the oil cylinder piston in a sleeved mode. A pressure reduction column is fixedly arranged on one side, close to the upper end, of the surface of the oil cylinder outer barrel. According to the explosion-proof hydraulic cylinder, automatic pressure reduction and temperature reduction are achieved through the pressure reduction column, the refrigeration pressure reduction pipe and the semiconductor refrigeration piece, it is guaranteed that hydraulic oil is safe and stable under high pressure and high temperature, assemblies such as the built-in pressure spring and the sealing pressing plate are automatically controlled, and manual intervention is not needed. The hydraulic cylinder is compact in structure, easy to install and suitable for a narrow space, the durability and safety of equipment are improved through multiple protection mechanisms, the cooling fin sets effectively dissipate heat, the service life is prolonged, the hydraulic oil flowing design is optimized, the temperature stability is guaranteed, and the overall performance and efficiency are improved, and due to the characteristics, the hydraulic cylinder is safer and more reliable in the using process.

Description

Technical Field

[0001] The utility model relates to the technical field of oil cylinders, in particular to an explosion-proof hydraulic cylinder. Background Art

[0002] The cylinder is an important component of the hydraulic system, usually composed of a container and a piston. The hydraulic oil is stored in the container. When mechanical movement or operation is required, the hydraulic oil is released and applies pressure to the piston, pushing the piston to move, thereby achieving the movement or operation of the mechanical parts. Cylinders are widely used in various industrial fields, such as manufacturing, construction, agriculture, etc. They provide an efficient and reliable way of power transmission.

[0003] Hydraulic cylinder explosion is an extremely dangerous fault. If the hydraulic system works for a long time under conditions exceeding the design pressure, it may cause cylinder material fatigue or failure, and eventually lead to explosion. The cylinder generates a lot of heat due to high-frequency operation, and the high external ambient temperature may cause the hydraulic oil temperature to rise too high, thereby causing an explosion.

[0004] Therefore, the utility model provides an explosion-proof hydraulic cylinder to solve the problems raised in the above background technology. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings of the prior art and to propose an explosion-proof hydraulic cylinder. The hydraulic cylinder of the utility model has the dual functions of decompression and cooling, and can use pressure to achieve automatic decompression and cooling, which is safer and more durable when used.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] An explosion-proof hydraulic cylinder comprises an oil cylinder outer tube, an inner movable sleeve of the oil cylinder outer tube is provided with an oil cylinder piston, and an inner fixed sleeve of the oil cylinder piston is provided with an oil cylinder inner rod;

[0008] A decompression column is fixedly arranged at the upper end of one side of the outer cylinder surface, a refrigeration decompression pipe is fixedly arranged at the lower end of the decompression column, a support plate is fixedly arranged at the lower end of the refrigeration decompression pipe, and a semiconductor refrigeration sheet is embedded at the center of the lower end surface of the support plate;

[0009] A decompression hole is provided between the decompression column and the inner part of the outer cylinder, a sealing pressure plate is provided inside the decompression hole, a pressure spring is fixedly provided between one side of the sealing pressure plate and the inner wall of the decompression column, and an oblique push block is fixedly provided on one side of the sealing pressure plate at the lower end of the pressure spring;

[0010] The internal movable sleeve of the refrigeration pressure reducing pipe is provided with a liquid pushing piston, the upper end of the liquid pushing piston is fixedly provided with a pressure rod, the upper end surface of the liquid pushing piston is embedded with a plurality of No. 1 one-way valves, an injection pipe is fixedly provided between the refrigeration pressure reducing pipe and the outer tube of the oil cylinder near the lower end, a No. 2 one-way valve is fixedly provided inside the injection pipe, and a pull rope is fixedly provided between the liquid pushing piston and the sealing pressure plate;

[0011] Through the above technical solution, the hydraulic cylinder of the utility model has the dual functions of reducing pressure and cooling, and can use pressure to realize automatic reducing pressure and cooling, which is safer and more durable when used.

[0012] Furthermore, an upper connector is fixedly provided at the upper end of the inner rod of the oil cylinder, and a lower connector is fixedly provided at the lower end of the outer tube of the oil cylinder;

[0013] Through the above technical solution, it is convenient to connect other devices externally through the lower connector and the upper connector.

[0014] Furthermore, one side of the support plate is fixedly connected to the outer barrel of the oil cylinder;

[0015] Through the above technical solution, the support plate is used to increase the firmness.

[0016] Furthermore, a heat sink group is fixedly provided on the lower end surface of the semiconductor refrigeration plate;

[0017] Through the above technical solution, the heat sink group is used for heat dissipation of the semiconductor refrigeration plate.

[0018] Furthermore, the upper end of the pressure rod is arranged to be inclined, and has the same inclination as the inclined push block;

[0019] Through the above technical solution, the inclined shape is set to facilitate the inclined push block to push the pressure rod, so that the pressure rod moves downward.

[0020] Furthermore, hydraulic oil is provided inside the refrigeration pressure reducing pipe and the outer cylinder of the oil cylinder;

[0021] Through the above technical solution, air cannot be set in the entire device.

[0022] Furthermore, the liquid pushing piston and the sealing pressure plate are both arranged in a circular shape, and the outer surfaces are both movably sleeved with a rubber sealing ring;

[0023] Through the above technical solution, the rubber sealing ring is used to increase the sealing performance.

[0024] The utility model has the following beneficial effects:

[0025] The utility model proposes an explosion-proof hydraulic cylinder. When the utility model is in use, when the pressure and temperature of the hydraulic oil in the hydraulic cylinder are too high and may explode, the structure of the hydraulic cylinder peripheral device pushes the sealing pressure plate under the action of pressure, so that part of the high-pressure and high-temperature hydraulic oil can be discharged into the refrigeration pressure reducing pipe to achieve the effect of pressure reduction. In this process, the hydraulic oil originally cooled by the semiconductor refrigeration plate in the refrigeration pressure reducing pipe will be squeezed into the inner part of the oil cylinder outer tube to achieve the cooling of the hydraulic oil. Therefore, the utility model can not only achieve cooling but also reduce pressure, so that the hydraulic cylinder arranged by the utility model has a stronger explosion-proof ability and is safer to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a front axial schematic diagram of the utility model;

[0027] Figure 2 It is a rear-view axle side schematic diagram of the utility model;

[0028] Figure 3 It is a top view schematic diagram of the utility model;

[0029] Figure 4 For the utility model Figure 3 Schematic diagram of the cross section of AA;

[0030] Figure 5 For the utility model Figure 4 Enlarged schematic diagram at point A in the middle.

[0031] Legend:

[0032] 1. Cylinder outer tube; 2. Lower connector; 3. Heat sink assembly; 4. Support plate; 5. Pressure reducing column; 6. Cylinder inner rod; 7. Upper connector; 8. Refrigeration pressure reducing pipe; 9. Semiconductor refrigeration plate; 10. No. 1 one-way valve; 11. Pressure rod; 12. Pressure spring; 13. Sealing pressure plate; 14. Pressure reducing hole; 15. Oblique push block; 16. Injection pipe; 17. No. 2 one-way valve; 18. Cylinder piston; 19. Liquid pushing piston; 20. Pull rope. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] Example

[0035] Reference Figure 1-5The utility model provides an embodiment: an explosion-proof hydraulic cylinder, comprising an oil cylinder outer tube 1, an inner movable sleeve of the oil cylinder outer tube 1 is provided with an oil cylinder piston 18, and an inner fixed sleeve of the oil cylinder piston 18 is provided with an oil cylinder inner rod 6;

[0036] A decompression column 5 is fixedly provided at the upper end of one side of the surface of the oil cylinder outer tube 1, a refrigeration decompression pipe 8 is fixedly provided at the lower end of the decompression column 5, a support plate 4 is fixedly provided at the lower end of the refrigeration decompression pipe 8, and a semiconductor refrigeration sheet 9 is embedded at the center of the lower end surface of the support plate 4;

[0037] A pressure relief hole 14 is provided between the pressure relief column 5 and the inner part of the oil cylinder outer tube 1, a sealing pressure plate 13 is provided inside the pressure relief hole 14, a pressure spring 12 is fixedly provided between one side of the sealing pressure plate 13 and the inner wall of the pressure relief column 5, and an oblique push block 15 is fixedly provided on one side of the sealing pressure plate 13 at the lower end of the pressure spring 12;

[0038] The internal movable sleeve of the refrigeration pressure reducing pipe 8 is provided with a liquid pushing piston 19, the upper end of the liquid pushing piston 19 is fixedly provided with a pressure rod 11, and the upper end surface of the liquid pushing piston 19 is embedded with a plurality of No. 1 one-way valves 10, an injection pipe 16 is fixedly provided at the lower end between the refrigeration pressure reducing pipe 8 and the outer tube 1 of the oil cylinder, and a No. 2 one-way valve 17 is fixedly provided inside the injection pipe 16, and a pull rope 20 is fixedly provided between the liquid pushing piston 19 and the sealing pressure plate 13;

[0039] The hydraulic cylinder of the utility model has the dual functions of reducing pressure and lowering temperature, and can realize automatic reducing pressure and lowering temperature by using pressure, so it is safer and more durable when in use.

[0040] An upper connecting head 7 is fixedly provided at the upper end of the inner rod 6 of the cylinder, and a lower connecting head 2 is fixedly provided at the lower end of the outer tube 1 of the cylinder. The lower connecting head 2 and the upper connecting head 7 are convenient for external connection with other equipment. One side of the support plate 4 is fixedly connected to the outer tube 1 of the cylinder, and the support plate 4 is used to increase the firmness.

[0041] A heat sink group 3 is fixedly provided on the lower end surface of the semiconductor refrigeration plate 9, and the heat sink group 3 is used for heat dissipation of the semiconductor refrigeration plate 9. The upper end of the pressure rod 11 is arranged to be inclined and has the same inclination as the inclined push block 15. The inclined shape is arranged to facilitate the inclined push block 15 to push the pressure rod 11 so that the pressure rod 11 moves downward. Hydraulic oil is provided inside the refrigeration pressure reducing pipe 8 and the outer tube 1 of the oil cylinder. Air cannot be provided in the entire equipment. The liquid pushing piston 19 and the sealing pressure plate 13 are arranged to be circular, and the outer surfaces are movably covered with rubber sealing rings, and the rubber sealing rings are used to increase the sealing performance.

[0042] The hydraulic cylinder achieves the decompression effect of the high-pressure hydraulic oil through the decompression column 5 and the refrigeration decompression pipe 8. When the hydraulic oil pressure in the hydraulic cylinder is too high, the decompression column 5 will move, allowing the high-pressure oil to enter the refrigeration decompression pipe 8. At the same time, the semiconductor refrigeration sheet 9 installed on the refrigeration decompression pipe 8 is a refrigeration device, which can quickly cool the hydraulic oil and prevent the explosion of the hydraulic oil due to high temperature and high pressure.

[0043] The hydraulic cylinder is designed with a multi-level automatic control mechanism. The pressure spring 12 is automatically compressed when the pressure increases, so that the sealing pressure plate 13 is opened, allowing oil to enter the action area of ​​the inclined thrust block 15 to complete the pressure reduction and cooling. This automatic control mechanism reduces the complexity of manual operation and improves the working safety and reliability of the hydraulic cylinder.

[0044] The design of the entire hydraulic cylinder is relatively compact, and the main components include the outer cylinder tube 1, the inner cylinder rod 6 and various internal components. Through reasonable layout, the components are integrated in a compact housing to ensure that the equipment can operate stably in a limited space. In addition, the design of the refrigeration pressure reducing pipe 8 and the semiconductor refrigeration plate 9 components also follows the compact principle, making the overall layout of the equipment more efficient.

[0045] Safety is a major feature of this hydraulic cylinder. Through the coordinated work of the sealing plate 13, the pressure spring 12, the refrigeration pressure reducing pipe 8 and the semiconductor refrigeration plate 9, a multiple protection mechanism is formed, which greatly reduces the operating risk of the equipment under high pressure and high temperature conditions. The explosion-proof design ensures that the equipment can still operate stably under extreme conditions and guarantees the safety of operators.

[0046] The combination of lever design and cooling technology reduces the aging speed of hydraulic oil. The introduction of heat sink group 3 allows the hydraulic oil to dissipate heat in time during the circulation process, thereby extending the service life of the overall system. The risk of hydraulic oil deterioration due to high temperature is reduced, thereby reducing maintenance costs and frequency.

[0047] The semiconductor cooling sheet 9 can effectively conduct heat and has a significant cooling effect. The heat sink group 3 on its lower surface quickly dissipates heat through natural convection or forced convection to ensure the stability of the hydraulic oil temperature. This design not only improves the cooling efficiency of the hydraulic cylinder, but also prevents system failure caused by high temperature.

[0048] The hydraulic oil flow path is optimized, and the arrangement of the injection pipe 16 and the first check valve 10 ensures efficient mixing of the cooled hydraulic oil with the hot hydraulic oil. Through this mixing design, the temperature of the hydraulic oil can be kept relatively stable during operation, thereby improving the performance and efficiency of the overall hydraulic cylinder system.

[0049] Through the above design, the utility model provides a safer and more reliable explosion-proof hydraulic cylinder solution, which has the advantages of highly integrated automatic control, efficient cooling design, and improved overall service life and safety.

[0050] Working principle: During use, when the hydraulic oil pressure in the outer tube 1 of the oil cylinder is too large and the temperature is too high, the hydraulic oil will push the sealing pressure plate 13 and compress the pressure spring 12 at the same time. When the sealing pressure plate 13 is pushed to a certain position to expose the refrigeration pressure reducing pipe 8, the high-temperature hydraulic oil in the outer tube 1 of the oil cylinder enters the refrigeration pressure reducing pipe 8 to release part of the high-temperature hydraulic oil. In this process, the semiconductor refrigeration plate 9 will cool the hydraulic oil in the refrigeration pressure reducing pipe 8. When the sealing pressure plate 13 is pushed to one side, the oblique push block 15 pushes the pressure rod 11. After the pressure rod 11 is pushed, the liquid push piston 19 moves downward, so that the colder hydraulic oil is discharged into the inner part of the outer tube 1 of the oil cylinder through the injection pipe 16, and mixed with the high-temperature hydraulic oil in the inner part of the outer tube 1 of the oil cylinder to achieve the effect of cooling. After the hydraulic oil pressure drops steadily, the pressure spring 12 is rebounded, and the liquid push piston 19 is pulled back to its original position under the action of the pull rope 20.

[0051] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An explosion-proof hydraulic cylinder, comprising an outer cylinder tube (1), characterized in that: The inner movable sleeve of the oil cylinder outer tube (1) is provided with an oil cylinder piston (18), and the inner fixed sleeve of the oil cylinder piston (18) is provided with an oil cylinder inner rod (6); A decompression column (5) is fixedly provided on one side of the surface of the oil cylinder outer tube (1) near the upper end, a refrigeration decompression pipe (8) is fixedly provided at the lower end of the decompression column (5), a support plate (4) is fixedly provided at the lower end of the refrigeration decompression pipe (8), and a semiconductor refrigeration plate (9) is embedded in the center of the lower end surface of the support plate (4); A pressure reducing hole (14) is provided between the pressure reducing column (5) and the inside of the oil cylinder outer tube (1); a sealing pressure plate (13) is provided inside the pressure reducing hole (14); a pressure spring (12) is fixedly provided between one side of the sealing pressure plate (13) and the inner wall of the pressure reducing column (5); and an inclined push block (15) is fixedly provided on one side of the sealing pressure plate (13) at the lower end of the pressure spring (12); The internal movable sleeve of the refrigeration pressure reducing pipe (8) is provided with a liquid pushing piston (19), the upper end of the liquid pushing piston (19) is fixedly provided with a pressure rod (11), the upper end surface of the liquid pushing piston (19) is embedded with a plurality of No. 1 one-way valves (10), an injection pipe (16) is fixedly provided between the refrigeration pressure reducing pipe (8) and the oil cylinder outer tube (1) at the lower end, a No. 2 one-way valve (17) is fixedly provided inside the injection pipe (16), and a pull rope (20) is fixedly provided between the liquid pushing piston (19) and the sealing pressure plate (13).

2. An explosion-proof hydraulic cylinder according to claim 1, characterized in that: An upper connecting head (7) is fixedly provided at the upper end of the oil cylinder inner rod (6), and a lower connecting head (2) is fixedly provided at the lower end of the oil cylinder outer tube (1).

3. The explosion-proof hydraulic cylinder according to claim 1, characterized in that: One side of the support plate (4) is fixedly connected to the oil cylinder outer tube (1).

4. The explosion-proof hydraulic cylinder according to claim 1, characterized in that: A heat sink group (3) is fixedly arranged on the lower end surface of the semiconductor refrigeration plate (9).

5. The explosion-proof hydraulic cylinder according to claim 1, characterized in that: The upper end of the pressure rod (11) is arranged in an inclined shape, and has the same inclination as the inclined push block (15).

6. The explosion-proof hydraulic cylinder according to claim 1, characterized in that: Hydraulic oil is provided inside the refrigeration pressure reducing pipe (8) and the oil cylinder outer tube (1).

7. The explosion-proof hydraulic cylinder according to claim 1, characterized in that: The liquid pushing piston (19) and the sealing pressure plate (13) are both arranged in a circular shape, and rubber sealing rings are movably sleeved on the outer surfaces.

Images