Hydraulic oil cylinder capable of realizing multi-stage explosion prevention

Abstract

The utility model belongs to the technical field of hydraulic oil cylinders, in particular to a multi-stage explosion-proof hydraulic oil cylinder, which comprises a cylinder body and a base, and further comprises a hydraulic shaft, a hydraulic oil cylinder, a hydraulic oil cylinder and a hydraulic oil cylinder, the first piston is connected to the interior of the cylinder body in a sliding mode, the bottom end of the hydraulic shaft is fixedly installed at the top end of the first piston, and one end of the oil inlet pipe fixedly communicates with the cylinder body; the hydraulic oil cylinder comprises a cylinder body, an oil return pipe and a cooling assembly, one end of the oil return pipe is fixedly communicated with the cylinder body, and the cooling assembly comprises a gas box and an air cooler. Overheat protection and overpressure protection of the hydraulic oil cylinder are achieved through a simple structure, the situation of cylinder explosion caused by high temperature and the situation of cylinder explosion caused by overlarge pressure can be avoided, and the service life of the hydraulic oil cylinder is prolonged. Multiple anti-explosion protection is achieved, the fault rate of the hydraulic oil cylinder is reduced, the service life of the hydraulic oil cylinder is prolonged, and practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic oil cylinders, in particular to a hydraulic oil cylinder capable of realizing multi-stage explosion-proofing. Background Art

[0002] The hydraulic cylinder is an actuator in the hydraulic system of the hydraulic cylinder. It is a hydraulic actuator that can convert hydraulic energy into mechanical energy and perform linear reciprocating motion (or swinging motion). It is widely used in the hydraulic systems of various machines.

[0003] In the existing technology, during the long-term operation of the hydraulic cylinder, the hydraulic oil will generate a large amount of heat due to the friction between the hydraulic oil and the cylinder wall. If the heat is dissipated outward only through the thermal conductivity of the hydraulic cylinder itself, it is difficult to achieve a good heat dissipation effect. If the hydraulic cylinder continues to work under high temperature, the service life of the hydraulic components will be reduced. In addition, the hydraulic cylinder does not have an overpressure protection function and cannot meet people's usage needs. To this end, we propose a multi-stage explosion-proof hydraulic cylinder to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings in the prior art that during the long-term operation of the hydraulic cylinder, the hydraulic oil will generate a large amount of heat due to the friction between the hydraulic oil and the cylinder wall. If the heat is dissipated outward only by the thermal conductivity of the hydraulic cylinder itself, it is difficult to achieve a good heat dissipation effect. If the hydraulic cylinder continues to work under high temperature, the service life of the hydraulic components will be reduced. In addition, the hydraulic cylinder does not have an overpressure protection function and cannot meet people's usage needs. A multi-stage explosion-proof hydraulic cylinder is proposed.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A multi-stage explosion-proof hydraulic cylinder includes a cylinder body and a base, and the hydraulic cylinder also includes:

[0007] A hydraulic shaft, the bottom end of which passes through the top of the cylinder and extends into the interior of the cylinder;

[0008] The first piston is slidably connected to the inside of the cylinder, and the bottom end of the hydraulic shaft is fixedly installed on the top end of the first piston.

[0009] An oil inlet pipe, one end of which is fixedly connected to the cylinder body;

[0010] An oil return pipe, one end of which is fixedly connected to the cylinder body;

[0011] A cooling assembly, comprising: a gas box and an air cooler, wherein the bottom of the gas box is fixedly mounted on the top of the base, the top of the gas box is fixedly mounted on the bottom end of the cylinder body, the air cooler is fixedly mounted on the top of the base, the left end of the air cooler is fixedly connected to the right side of the gas box, and a plurality of air outlets are opened on the top of the gas box;

[0012] An overpressure protection component is provided on the cylinder body and is used for overload protection of the pressure inside the cylinder body.

[0013] As a preferred solution of the present invention, electrically controlled valves are fixedly installed on both the oil inlet pipe and the oil return pipe.

[0014] As a preferred solution of the present invention, a plurality of heat dissipation fins are fixedly mounted on the outer side of the cylinder body, and the heat dissipation fins match the corresponding air outlets.

[0015] As a preferred solution of the present invention, the overpressure protection assembly includes a pressure relief pipe, an electric push rod and a second piston. The pressure relief pipe is fixedly connected to the rear side of the cylinder body, the second piston is slidably connected to the inside of the pressure relief pipe, the electric push rod is fixedly installed at the rear end of the pressure relief pipe, and the output shaft of the electric push rod passes through the pressure relief pipe and is fixedly installed on the second piston.

[0016] As a preferred solution of the present invention, a pressure sensor is fixedly installed on the bottom of the first piston, and the pressure sensor cooperates with the electric push rod.

[0017] As a preferred solution of the present invention, two mounting holes are provided on the left inner wall of the pressure relief pipe, and a first one-way valve and a second one-way valve are fixedly installed in the two mounting holes respectively.

[0018] Beneficial effects:

[0019] 1. By starting the air cooler, cold air can be blown into and out of the gas box. At this time, the cold air entering the gas box will be discharged upward through multiple air outlets, thereby cooling the cylinder body, thereby cooling the cylinder body, hydraulic shaft, first piston and the hydraulic oil inside it, avoiding high-temperature cylinder explosion and achieving overheating protection. Here, the heat dissipation fins can be provided to achieve rapid introduction of the cylinder body, thereby facilitating the reception of cold air discharged from the air outlet for efficient heat dissipation, greatly improving the heat dissipation efficiency and effect;

[0020] 2. By starting the electric push rod, the second piston can be driven to move backward, thereby allowing the second piston to release the space inside the pressure relief pipe, allowing the hydraulic oil inside the cylinder to enter the pressure relief pipe and reduce the pressure inside the cylinder. At this time, pressure relief protection inside the cylinder can be achieved, and automatic pressure relief can be achieved when the pressure inside the cylinder is too high, avoiding the occurrence of cylinder explosion caused by excessive pressure;

[0021] The utility model realizes overheat protection and overpressure protection of the hydraulic cylinder through a simple structure, can avoid the cylinder explosion caused by high temperature and the cylinder explosion caused by excessive pressure, realizes multiple explosion-proof protection, reduces the failure rate of the hydraulic cylinder, increases its service life, and is highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a three-dimensional main view of the structure of the utility model;

[0023] Figure 2 This is a three-dimensional rear view of the structure of the utility model;

[0024] Figure 3 This is a structural sectional view of the utility model;

[0025] Figure 4 For the utility model Figure 3 Schematic diagram of the structure of part A.

[0026] In the figure: 1. Cylinder body; 2. Hydraulic shaft; 3. First piston; 4. Pressure sensor; 5. Gas box; 6. Base; 7. Air cooler; 8. Air outlet; 9. Heat sink fins; 10. Oil inlet pipe; 11. Oil return pipe; 12. Electric control valve; 13. Pressure relief pipe; 14. Electric push rod; 15. Second piston; 16. First one-way valve; 17. Second one-way valve. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely 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.

[0028] Example

[0029] Reference Figures 1-4 A multi-stage explosion-proof hydraulic cylinder includes a cylinder body 1 and a base 6. The hydraulic cylinder also includes:

[0030] A hydraulic shaft 2, the bottom end of which passes through the top of the cylinder body 1 and extends into the interior of the cylinder body 1;

[0031] The first piston 3 is slidably connected to the inside of the cylinder 1, and the bottom end of the hydraulic shaft 2 is fixedly installed on the top end of the first piston 3.

[0032] An oil inlet pipe 10, one end of which is fixedly connected to the cylinder body 1;

[0033] An oil return pipe 11, one end of which is fixedly connected to the cylinder body 1;

[0034] The cooling component includes: a gas box 5 and an air cooler 7. The bottom of the gas box 5 is fixedly mounted on the top of the base 6. The top of the gas box 5 is fixedly mounted on the bottom end of the cylinder 1. The air cooler 7 is fixedly mounted on the top of the base 6. The left end of the air cooler 7 is fixedly connected to the right side of the gas box 5. A plurality of air outlets 8 are opened on the top of the gas box 5.

[0035] The overpressure protection component is arranged on the cylinder body 1 and is used to provide overload protection for the pressure inside the cylinder body 1 .

[0036] By means of the above structure: by starting the air cooler 7, cold air can be blown into and out of the gas box 5. At this time, the cold air entering the gas box 5 will be discharged upward through multiple air outlets 8, thereby being able to dissipate the heat of the cylinder body 1, thereby being able to cool the cylinder body 1, the hydraulic shaft 2, the first piston 3 and the hydraulic oil therein, thereby avoiding high-temperature cylinder explosion and achieving overheating protection.

[0037] As a preferred solution of the present invention, an electrically controlled valve 12 is fixedly installed on both the oil inlet pipe 10 and the oil return pipe 11. By providing two electrically controlled valves 12, the oil inlet pipe 10 and the oil return pipe 11 can be respectively switched on and off.

[0038] As a preferred solution of the present invention, a plurality of heat dissipating fins 9 are fixedly installed on the outer side of the cylinder body 1. The heat dissipating fins 9 cooperate with the corresponding air outlet 8. By setting the heat dissipating fins 9, the cylinder body 1 can be quickly introduced, thereby facilitating the reception of the cold air discharged from the air outlet 8 for efficient heat dissipation, thereby greatly improving the heat dissipation efficiency and effect.

[0039] As a preferred solution of the present invention, the overpressure protection component includes a pressure relief pipe 13, an electric push rod 14 and a second piston 15. The pressure relief pipe 13 is fixedly connected to the rear side of the cylinder body 1, and the second piston 15 is slidably connected to the inside of the pressure relief pipe 13. The electric push rod 14 is fixedly installed at the rear end of the pressure relief pipe 13. The output shaft of the electric push rod 14 passes through the pressure relief pipe 13 and is fixedly installed on the second piston 15. By starting the electric push rod 14, the second piston 15 can be driven to move backward, so that the second piston 15 can release the space inside the pressure relief pipe 13, and the hydraulic oil inside the cylinder body 1 can enter the pressure relief pipe 13 and reduce the pressure inside the cylinder body 1. At this time, pressure relief protection of the cylinder body 1 can be achieved, and automatic pressure relief can be achieved when the pressure inside the cylinder body 1 is too high, thereby avoiding the occurrence of cylinder explosion caused by excessive pressure.

[0040] As a preferred solution of the present invention, a pressure sensor 4 is fixedly installed at the bottom of the first piston 3. The pressure sensor 4 cooperates with the electric push rod 14. By providing the pressure sensor 4, the pressure inside the cylinder 1 can be easily monitored.

[0041] As a preferred solution of the present invention, two mounting holes are provided on the left inner wall of the pressure relief pipe 13, and a first one-way valve 16 and a second one-way valve 17 are fixedly installed inside the two mounting holes respectively. By setting the first one-way valve 16, the gas inside the pressure relief pipe 13 can be released to the outside when the second piston 15 moves backward inside the pressure relief pipe 13. At this time, the second one-way valve 17 is in a closed state. By setting the second one-way valve 17, the gas outside the pressure relief pipe 13 can enter the pressure relief pipe 13 when the second piston 15 moves forward inside the pressure relief pipe 13. At this time, the first one-way valve 16 is in a closed state. Here, through the cooperation between the first one-way valve 16 and the second one-way valve 17, it can be avoided that a vacuum state is formed inside the pressure relief pipe 13 when the second piston 15 moves, thereby ensuring that the air pressure inside the pressure relief pipe 13 is normal.

[0042] It should be noted that the specific types of pressure sensor 4, air cooler 7, electric control valve 12, electric push rod 14, first one-way valve 16 and second one-way valve 17 to be used are selected by relevant technical personnel familiar with the field, and the above pressure sensor 4, air cooler 7, electric control valve 12, electric push rod 14, first one-way valve 16 and second one-way valve 17 are all existing technologies and will not be elaborated in this solution.

[0043] The working principle of the present invention is as follows: when in use, the hydraulic cylinder is first connected to an external power source, and then the air cooler 7 is started to blow cold air into and out of the gas box 5. At this time, the cold air entering the gas box 5 will be discharged upward through multiple air outlets 8, thereby being able to dissipate heat from the cylinder body 1, thereby being able to cool the cylinder body 1, the hydraulic shaft 2, the first piston 3 and the hydraulic oil therein, thereby avoiding the situation of high-temperature cylinder explosion and achieving overheating protection. Here, by providing the heat dissipation fins 9, the cylinder body 1 can be quickly introduced, thereby facilitating the reception of the cold air discharged from the air outlet 8 for efficient heat dissipation, greatly improving the heat dissipation efficiency and effect. In addition, by starting the electric push rod 14, the second piston 15 can be driven to move backward, thereby enabling the second piston 15 to release the space inside the pressure relief pipe 13, enabling the hydraulic oil inside the cylinder body 1 to enter the pressure relief pipe 13 and reduce the pressure inside the cylinder body 1. At this time, pressure relief protection can be achieved inside the cylinder 1, and automatic pressure relief can be achieved when the pressure inside the cylinder 1 is too high, thereby avoiding the occurrence of cylinder explosion caused by excessive pressure. Here, by setting the pressure sensor 4, the pressure inside the cylinder 1 can be monitored conveniently. By setting the first one-way valve 16, the gas inside the pressure relief pipe 13 can be released to the outside when the second piston 15 moves backward inside the pressure relief pipe 13. At this time, the second one-way valve 17 is in a closed state, and by setting the second one-way valve 17, the gas outside the pressure relief pipe 13 can enter the pressure relief pipe 13 when the second piston 15 moves forward inside the pressure relief pipe 13. At this time, the first one-way valve 16 is in a closed state. Here, through the cooperation between the first one-way valve 16 and the second one-way valve 17, it can be avoided that the second piston 15 moves in a vacuum state inside the pressure relief pipe 13, thereby ensuring that the air pressure inside the pressure relief pipe 13 is normal.

[0044] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A multi-stage explosion-proof hydraulic cylinder, comprising a cylinder body (1) and a base (6), characterized in that: The hydraulic cylinder also includes: A hydraulic shaft (2), the bottom end of which passes through the top of the cylinder (1) and extends into the interior of the cylinder (1); A first piston (3) is slidably connected to the interior of the cylinder (1), and the bottom end of the hydraulic shaft (2) is fixedly mounted on the top end of the first piston (3). An oil inlet pipe (10), one end of which is fixedly connected to the cylinder body (1); An oil return pipe (11), one end of which is fixedly connected to the cylinder body (1); A cooling component, the cooling component comprising: a gas box (5) and a cooling fan (7), the bottom of the gas box (5) being fixedly mounted on the top of the base (6), the top of the gas box (5) being fixedly mounted on the bottom end of the cylinder body (1), the cooling fan (7) being fixedly mounted on the top of the base (6), the left end of the cooling fan (7) being fixedly connected to the right side of the gas box (5), and a plurality of air outlets (8) being provided on the top of the gas box (5); An overpressure protection component is provided on the cylinder body (1), and is used for overload protection of the pressure inside the cylinder body (1).

2. The multi-stage explosion-proof hydraulic cylinder according to claim 1, characterized in that: An electric control valve (12) is fixedly installed on both the oil inlet pipe (10) and the oil return pipe (11).

3. The multi-stage explosion-proof hydraulic cylinder according to claim 1, characterized in that: A plurality of heat dissipation fins (9) are fixedly mounted on the outer side of the cylinder body (1), and the heat dissipation fins (9) are matched with corresponding air outlets (8).

4. The multi-stage explosion-proof hydraulic cylinder according to claim 1, characterized in that: The overpressure protection assembly comprises a pressure relief pipe (13), an electric push rod (14) and a second piston (15); the pressure relief pipe (13) is fixedly connected to the rear side of the cylinder body (1); the second piston (15) is slidably connected to the inside of the pressure relief pipe (13); the electric push rod (14) is fixedly mounted on the rear end of the pressure relief pipe (13); and the output shaft of the electric push rod (14) passes through the pressure relief pipe (13) and is fixedly mounted on the second piston (15).

5. The multi-stage explosion-proof hydraulic cylinder according to claim 4, characterized in that: A pressure sensor (4) is fixedly mounted on the bottom of the first piston (3), and the pressure sensor (4) cooperates with an electric push rod (14).

6. The multi-stage explosion-proof hydraulic cylinder according to claim 4, characterized in that: Two mounting holes are provided on the left inner wall of the pressure relief pipe (13), and a first one-way valve (16) and a second one-way valve (17) are fixedly installed in the two mounting holes respectively.

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