A hydraulic lifting platform oil tank heating system for low temperature environment

Abstract

This utility model discloses a hydraulic lifting platform oil tank heating system for use in low-temperature environments, which solves the problem that the hydraulic lifting platform will descend slowly or even stop in low-temperature environments; a hydraulic push rod cylinder (2) is provided on the scissor fork of the mechanical lifting platform (1); a high-pressure oil pipe (3) is connected to the bottom of the hydraulic push rod cylinder (2), and the hydraulic push rod cylinder (2) is connected to the hydraulic pump (5) through the high-pressure oil pipe (3). An oil tank (7) is connected to the hydraulic pump (5), and hydraulic oil (8) is filled inside the oil tank (7); an electric heating rod (9) and a temperature sensor (10) are respectively provided inside the oil tank (7), and a flexible heating strip (11) is wrapped around the outside of the high-pressure oil pipe (3); to ensure that the overall lifting action of the hydraulic lifting platform is smooth.

Description

Technical Field

[0001] This utility model relates to a heating system for the oil storage tank of a hydraulic lifting platform, and particularly to a heating system for the oil storage tank of a hydraulic lifting platform used in low-temperature environments. Background Technology

[0002] In automated storage and retrieval systems (AS / RS), hydraulic lifting platforms are commonly used equipment, primarily for synchronously lifting goods on conveyor lines. A hydraulic lifting platform mainly consists of a mechanical lifting section and a hydraulic power unit. The mechanical lifting section connects to the conveyor equipment via a top platform, with a scissor-fork structure providing lifting support. The scissor-fork is driven by hydraulic cylinders powered by a hydraulic pump, achieving the lifting of the mechanical section. The primary function of an AS / RS is to store goods, and the temperature inside the warehouse is generally the same as the surrounding environment. However, when the hydraulic lifting platform is installed at the entrance or exit of the AS / RS, the external ambient temperature can affect its operation, especially in areas with low winter temperatures. When the ambient temperature is high, hydraulic oil can maintain good fluidity, making the hydraulic lifting platform move smoothly. However, when the ambient temperature is low, the hydraulic oil will condense, and the overall flow will become slow. During the lifting phase, the hydraulic pump can force the condensed hydraulic oil in the reservoir to the hydraulic thrust cylinder to achieve normal lifting. However, when the platform descends, its own weight forces the hydraulic oil in the thrust cylinder to flow into the reservoir for storage. This can cause the platform to descend slowly or even stop, affecting normal warehouse operations. Ensuring the smooth operation of the hydraulic lifting platform in low-temperature environments has become an urgent problem to be solved in automated warehouses. Summary of the Invention

[0003] This invention provides a heating system for the oil storage tank of a hydraulic lifting platform in low-temperature environments, which solves the technical problem that the hydraulic lifting platform may descend slowly or even stop in low-temperature environments.

[0004] This utility model solves the above technical problems through the following technical solution: A hydraulic lifting platform oil tank heating system for low-temperature environments includes a mechanical lifting platform, with a hydraulic push rod cylinder mounted on the scissor fork of the mechanical lifting platform; a high-pressure oil pipe is connected to the bottom of the hydraulic push rod cylinder, and the hydraulic push rod cylinder is connected to a hydraulic pump through the high-pressure oil pipe; an oil tank is connected to the hydraulic pump, and the oil tank is filled with hydraulic oil; an electric heating rod and a temperature sensor are respectively installed inside the oil tank, and a flexible heating strip is wrapped around the outside of the high-pressure oil pipe.

[0005] A solenoid valve is installed on the high-pressure oil pipe, and an upper position detection switch and a lower position detection switch are installed on the hydraulic push rod cylinder respectively; a hydraulic pump drive motor is connected to the hydraulic pump, and the hydraulic pump drive motor is electrically connected to the electrical control box; the upper position detection switch, the lower position detection switch, the electric heating rod, the temperature sensor and the solenoid valve are all electrically connected to the electrical control box.

[0006] When the environment is in low temperature, this utility model can automatically heat the hydraulic oil in the oil tank of the hydraulic lifting platform, so that the hydraulic oil in the oil tank is kept within a certain temperature range, so that the hydraulic oil has good fluidity and ensures that the overall lifting action of the hydraulic lifting platform is smooth. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the heating system of this utility model. Detailed Implementation

[0008] The present invention will now be described in detail with reference to the accompanying drawings: A hydraulic lifting platform oil tank heating system for low-temperature environments includes a mechanical lifting platform 1. A hydraulic push rod cylinder 2 is located at the middle of the mechanical lifting platform 1. An upper position detection switch 13 and a lower position detection switch 14 are installed on the cylinder body of the hydraulic push rod cylinder 2 to detect the lifting and stopping position of the mechanical lifting part 1. A high-pressure oil pipe 3 is connected to the bottom of the hydraulic push rod cylinder 2, and the hydraulic push rod cylinder 2 is connected to a hydraulic pump 5 through the high-pressure oil pipe 3. A solenoid valve 4 is installed at the connection of the hydraulic pump 5 with the high-pressure oil pipe 3. A hydraulic pump drive motor 6 is directly connected to the hydraulic pump 5 to provide power to the hydraulic pump 5. The hydraulic pump 5 is also connected to an oil tank 7, which contains hydraulic oil 8. The hydraulic oil 8 flows between the oil tank 7, the hydraulic pump 5, the high-pressure oil pipe 3, and the hydraulic push rod cylinder 2, and the forward and reverse flow is achieved through the solenoid valve 4 and the hydraulic pump 5.

[0009] Under normal temperature conditions, when the mechanical lifting platform 1 needs to be lifted, the electrical control box 12 sends an electrical signal to the solenoid valve 4 and the hydraulic pump drive motor 6. Upon receiving the signal, the solenoid valve 4 opens, and the hydraulic pump drive motor 6 starts operating, thereby driving the hydraulic pump 5. The hydraulic pump 5 delivers the hydraulic oil 8 from the oil reservoir 7 through the solenoid valve 4 and the high-pressure oil pipe 3 to the hydraulic push rod cylinder 2. The hydraulic oil 8 pushes out the push rod of the hydraulic push rod cylinder 2, at which point the hydraulic push rod cylinder 2 drives the mechanical lifting platform 1 to achieve the lifting action. When the mechanical lifting platform 1 is lifted to the correct position, the upper position detection switch 13 sends a signal to the electrical control box 12. When a signal is sent, the electrical control box 12 controls the drive motor 6 to stop running, and at the same time the solenoid valve 4 closes, completing the lifting action of the mechanical lifting platform 1. When the mechanical lifting platform 1 needs to be lowered, the electrical control box 12 sends a signal to control the solenoid valve 4 to open. Under its own gravity, the mechanical lifting platform 1 squeezes out the hydraulic oil 8 inside the hydraulic push rod cylinder 2. The squeezed hydraulic oil 8 flows back into the oil storage tank 7 through the high-pressure oil pipe 3 and the solenoid valve 4. When the mechanical lifting part 1 is lowered to the correct position, the lowering detection switch 14 sends a signal to the electrical control box 12, and the electrical control box 12 controls the solenoid valve 4 to close, completing the lowering action of the mechanical lifting platform 1.

[0010] When exposed to low temperatures, the hydraulic oil 8 condenses, resulting in slow overall flow. This slows the return flow of the hydraulic oil 8 as the mechanical lifting platform 1 descends, causing obstruction during descent. Therefore, an electric heating rod 9 and a temperature sensor 10 are installed inside the oil tank 7, and a flexible heating strip 11 is wrapped around the outside of the high-pressure oil pipe 3. When the temperature sensor 10 detects that the temperature of the hydraulic oil 8 in the oil tank 7 is lower than a set value, the electrical control box 12 automatically activates the electric heating rod 9 and the flexible heating strip 11. These elements simultaneously heat the hydraulic oil 8 in both the oil tank 7 and the high-pressure oil pipe 3, thus improving the hydraulic oil temperature. 8. No condensation will occur when the temperature rises; when the temperature of the hydraulic oil 8 in the oil tank 7 and the high-pressure oil pipe 3 rises to the upper limit of the set temperature, the electrical control box 12 controls the electric heating rod 9 and the flexible heating belt 11 to automatically disconnect. After disconnection, the electric heating rod 9 and the flexible heating belt 11 will no longer continue to heat the hydraulic oil 8 in the oil tank 7 and the high-pressure oil pipe 3, ensuring that the hydraulic oil 8 in the oil tank 7 and the high-pressure oil pipe 3 remains within the preset temperature range when the external ambient temperature changes drastically, and the hydraulic oil 8 in the oil tank 7 and the high-pressure oil pipe 3 will no longer experience low-temperature condensation, ensuring that the mechanical lifting platform 1 can smoothly complete the rising and falling actions even in low-temperature environments.

Claims

1. A heating system for a hydraulic lifting platform oil tank in a low-temperature environment, comprising a mechanical lifting platform (1), wherein a hydraulic push rod cylinder (2) is provided on the scissor fork of the mechanical lifting platform (1); characterized in that, A high-pressure oil pipe (3) is connected to the bottom of the hydraulic push rod cylinder (2). The hydraulic push rod cylinder (2) is connected to the hydraulic pump (5) through the high-pressure oil pipe (3). An oil storage tank (7) is connected to the hydraulic pump (5). Hydraulic oil (8) is stored inside the oil storage tank (7). An electric heating rod (9) and a temperature sensor (10) are respectively installed inside the oil storage tank (7). A flexible heating strip (11) is wrapped around the outside of the high-pressure oil pipe (3).

2. The hydraulic lifting platform oil tank heating system for low-temperature environments according to claim 1, characterized in that, A solenoid valve (4) is installed on the high-pressure oil pipeline (3), and an upper position detection switch (13) and a lower position detection switch (14) are respectively installed on the hydraulic push rod cylinder (2); a hydraulic pump drive motor (6) is connected to the hydraulic pump (5), and the hydraulic pump drive motor (6) is electrically connected to the electrical control box (12); the upper position detection switch (13), the lower position detection switch (14), the electric heating rod (9), the temperature sensor (10) and the solenoid valve (4) are all electrically connected to the electrical control box (12).

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