Synchronous door opening and closing hydraulic system driven by electronic hydraulic pump

Abstract

The utility model discloses a synchronous door opening and closing hydraulic system driven by an electronic hydraulic pump, and relates to the technical field of hydraulic systems. The electronic hydraulic pump is connected with the motor; the electric control system is connected with a control electromagnet of the electronic hydraulic pump through an electric signal; the overflow valves are respectively connected with the electronic hydraulic pumps in parallel and are connected with a main oil path; the electromagnetic stop valves are respectively connected with the electronic hydraulic pump; the hydraulic oil cylinders are respectively connected with the electromagnetic stop valves and are in control connection with the door body; the hydraulic oil cylinder is connected with a pressure sensor; the position sensors are respectively connected with the hydraulic oil cylinders; the controller is used for changing the flow of the hydraulic system by adjusting the swing angle change of the electronic hydraulic pump so as to adjust synchronization and deviation correction of the two hydraulic oil cylinders, and practicability and safety are improved; the displacement of the electronic hydraulic pump is used for changing the volume for speed regulation, excess energy loss is avoided, throttling loss is also avoided, and energy is saved to the maximum extent.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic systems, in particular to a hydraulic system for synchronously opening and closing doors driven by an electronic hydraulic pump. Background Art

[0002] When large door equipment is opened, the movement of the two oil cylinders in the oil circuit cannot be synchronized, resulting in a jam, which causes the door to be unable to open or close completely, leading to major accidents. Especially in the application of hoists in the water conservancy industry, the door cannot be opened and closed normally, which will cause catastrophic consequences. In the frequent opening and closing of door applications, with the continuous development of technology, energy saving needs to be considered. For this reason, an electronic hydraulic pump driven synchronous opening and closing door hydraulic system is proposed. Summary of the invention

[0003] The utility model aims to solve the defects and shortcomings of the prior art by proposing an electronic hydraulic pump driven synchronous opening and closing door hydraulic system.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: it comprises a door body;

[0005] It also contains:

[0006] An electrical control system, wherein the electrical control system is connected to two motors;

[0007] Electronic hydraulic pumps, the number of which is two and which are respectively connected to the motor; the electrical control system is connected to the control electromagnet of the electronic hydraulic pump via an electrical signal;

[0008] Overflow valve, the number of the overflow valve is two, and each of the overflow valves is connected in parallel with the electronic hydraulic pump and connected to the main oil circuit;

[0009] Solenoid stop valves, the number of which is two and which are respectively connected to the electronic hydraulic pump;

[0010] Hydraulic cylinders, there are two hydraulic cylinders, which are respectively connected to the electromagnetic stop valves, and the hydraulic cylinders control the door body; the hydraulic cylinders are connected to a pressure sensor;

[0011] Position sensor: there are two position sensors, and they are connected to the hydraulic cylinders respectively.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model provides an electronic hydraulic pump driven synchronous opening and closing door hydraulic system, which uses a controller to change the hydraulic system flow by adjusting the swing angle of the electronic hydraulic pump to adjust the synchronization and correction of the two hydraulic cylinders, thereby improving practicality and safety; the displacement of the electronic hydraulic pump is used to change the volume speed regulation, without unnecessary energy loss, and also avoids throttling loss, thereby maximizing energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0014] Figure 1 It is a system schematic diagram of the utility model.

[0015] Description of reference numerals:

[0016] Door body 1, electrical control system 2, motor 3, electronic hydraulic pump 4, overflow valve 5, electromagnetic stop valve 6, hydraulic cylinder 7, pressure sensor 8, position sensor 9. DETAILED DESCRIPTION

[0017] The utility model is further described below in conjunction with the accompanying drawings.

[0018] See also Figure 1 , which comprises a door body 1;

[0019] It also contains:

[0020] An electrical control system 2, wherein the electrical control system 2 is connected to two motors 3;

[0021] The electronic hydraulic pump 4 is two in number and connected to the motor 3 respectively; the electrical control system 2 is connected to the control electromagnet of the electronic hydraulic pump 3 through an electrical signal;

[0022] Overflow valve 5, the number of the overflow valve 5 is two, and each of them is connected in parallel with the electronic hydraulic pump 4 and connected to the main oil circuit;

[0023] Solenoid stop valves 6, the number of the solenoid stop valves 6 is two, and they are respectively connected to the electronic hydraulic pump 4;

[0024] Hydraulic cylinder 7, the number of the hydraulic cylinder 7 is two, and each is connected to the electromagnetic stop valve 6, and the hydraulic cylinder 7 controls the door body 1; the hydraulic cylinder 7 is connected to a pressure sensor 8;

[0025] Position sensor 9 , the number of the position sensors 9 is two, and they are connected to the hydraulic cylinder 7 respectively.

[0026] Working principle of this specific implementation method: The specific usage models of the components mentioned in the utility model are directly purchased, installed and used from the market according to actual usage requirements; when in use, the electrical control system 2 provides a control signal to the electronic hydraulic pump 4 after the control program is calculated, and the proportion of the electronic hydraulic pump 4 drives the swing angle of the electronic hydraulic pump 4 to change through the electromagnet, and the displacement strictly changes according to the control signal of the electrical control system 2, and the motor 3 drives the electronic hydraulic pump 4 to rotate. At this time, the electronic hydraulic pump 4 is in the positive direction of displacement, providing high-pressure hydraulic oil to the hydraulic system, and the hydraulic oil passes through the main oil circuit in parallel with the safety overflow valve 5 to protect the oil circuit; the hydraulic oil switches the oil circuit to normal through the electromagnetic stop valve 6, and then reaches the lower chamber of the hydraulic cylinder 7 and drives the hydraulic cylinder 7 to drive the door body 1 to rise and fall; the two hydraulic cylinders 7 lift the large door body 1 synchronously from both ends at the same time, and the lifting speed and position control are adjusted by the electrical control system 2; during the descent of the door body 1, the self-weight of the door body 1 drives the hydraulic cylinder 7 to descend, The hydraulic oil reaches the electronic hydraulic pump 4 after being conducted through the electromagnetic stop valve 6. The flow rate of the hydraulic system is changed by changing the displacement in the negative direction of the electronic hydraulic pump 4. The control of the descending speed and position is adjusted by the electrical control system 2; the electrical control system 2 changes the flow rate of the hydraulic system by giving the electronic hydraulic pump 4 a swing angle command, thereby adjusting the synchronous control of the two hydraulic cylinders 7 during the rising and falling processes respectively. In addition, when the hydraulic cylinders 7 are not synchronized, correction can also be achieved through the different control signals of the electrical control system 2; the electrical control system 2 is a closed-loop control system, which controls the signal of the position sensor 9 connected to the hydraulic cylinder 7 and feeds it back to the electrical control system 2. The electrical control system 2 completes the closed-loop synchronization operation according to the command signal and the feedback position signal, and gives the swing angle signals to the two electronic hydraulic pumps 4 respectively; in addition, during the operation, the pressure sensors 8 provided at the oil ports of the two hydraulic cylinders 7 are used to detect the pressure of the two hydraulic cylinders 7 to prevent overpressure or monitor the pressure difference between the two hydraulic cylinders 7.

[0027] After adopting the above structure, the beneficial effects of this specific implementation are:

[0028] 1. The controller is used to adjust the swing angle of the electronic hydraulic pump 4 to change the flow of the hydraulic system to adjust the synchronization and deviation of the two hydraulic cylinders 7, thereby improving practicality and safety;

[0029] 2. The displacement of the electronic hydraulic pump 4 is used to change the volume speed regulation, without any unnecessary energy loss, and also avoiding throttling loss, thus maximizing energy saving.

[0030] The above description is only used to illustrate the technical solution of the utility model rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the utility model by ordinary technicians in this field should be included in the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.

Claims

1. A hydraulic system for synchronously opening and closing doors driven by an electronic hydraulic pump, comprising a door body (1); It is characterized in that It also contains: An electrical control system (2), wherein the electrical control system (2) is connected to two motors (3); An electronic hydraulic pump (4), wherein the number of the electronic hydraulic pumps (4) is two and each of the electronic hydraulic pumps (4) is connected to the motor (3); the electrical control system (2) is connected to the control electromagnet of the electronic hydraulic pump (4) via an electrical signal; Overflow valves (5), the number of the overflow valves (5) is two, and they are respectively connected in parallel with the electronic hydraulic pump (4) and connected to the main oil circuit; Solenoid stop valves (6), the number of the solenoid stop valves (6) is two, and each of the solenoid stop valves (6) is connected to the electronic hydraulic pump (4); A hydraulic cylinder (7), wherein the number of the hydraulic cylinders (7) is two and each of them is connected to the electromagnetic stop valve (6), and the hydraulic cylinder (7) controls the connection door body (1); a pressure sensor (8) is connected to the hydraulic cylinder (7); Position sensors (9), wherein the number of the position sensors (9) is two and they are respectively connected to the hydraulic cylinders (7).

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