Gantry counterweight hydraulic system

Abstract

The utility model relates to the technical field of hydraulic balance weights, in particular to a gantry balance weight hydraulic system. The hydraulic balance valve comprises a first valve block and a second valve block, oil ducts are arranged in the first valve block and the second valve block respectively, an oil inlet in the first valve block is connected to a hydraulic pump station for supplying oil, an oil outlet of the first valve block is connected to an oil inlet of the second valve block, and an oil outlet of the second valve block is connected to a balance oil cylinder. An oil return channel with the two ends connected to the oil channel and the oil tank respectively is arranged in the first valve block, an overflow valve is arranged in the oil return channel, a plurality of energy accumulators are installed on the second valve block, and the energy accumulators are all connected to the oil channel in the second valve block. The energy accumulator is adopted, the stability of oil way pressure is enhanced, and pressure fluctuation is greatly reduced; the pressure switch and the electromagnetic ball valve are arranged to conduct electric closed-loop control, pressure is automatically monitored, pressure supplement is controlled, the structure is simple, efficient and stable, the overflow valve is arranged as a safety device, and the safety of equipment is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic counterweights, in particular to a gantry counterweight hydraulic system. Background Art

[0002] Gantry counterweight hydraulic systems must maintain balance and stability during hoisting and suspension operations to ensure the safety and accuracy of the hoisted objects. As a key component in the system, the counterbalance valve balances pressure differences within the hydraulic system, maintaining system stability and preventing equipment sway or tilt due to pressure imbalances. Using a counterbalance valve in a gantry counterweight hydraulic system allows for precise control of the weight of the hoisted object, improving operational precision and accuracy.

[0003] There are some defects in the use of balance valve counterweights in traditional gantry counterweight hydraulic systems. For example, improper adjustment or unreasonable design of the balance valve will lead to poor system stability, prone to pressure fluctuations and even system instability. Utility Model Content

[0004] The purpose of the present invention is to provide a gantry counterweight hydraulic system with a reasonable design to solve the defects and shortcomings of the existing technology, which can solve the above-mentioned defects.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical solutions: it includes a first valve block and a second valve block, the first valve block and the second valve block are respectively provided with oil passages, the oil inlet in the first valve block is connected to the hydraulic pump station for oil supply, the oil outlet of the first valve block is connected to the oil inlet of the second valve block, the oil outlet of the second valve block is connected to the balancing oil cylinder, the first valve block is provided with an oil return passage with two ends respectively connected to the oil passage and the oil tank, an overflow valve is provided in the oil return passage, and several accumulators are installed on the second valve block, and the accumulators are all connected to the oil passage in the second valve block.

[0006] Preferably, an electromagnetic ball valve is provided in the oil passage in the first valve block.

[0007] Preferably, a pressure switch connected to an internal oil passage of the first valve block is installed on the first valve block, and the pressure switch is electrically connected to the electromagnetic ball valve.

[0008] Preferably, a pressure gauge connected to the oil channel is installed on the first valve block.

[0009] Preferably, the set pressure of the relief valve is higher than the high pressure threshold of the pressure switch.

[0010] Preferably, a service valve is installed on the oil pipe between the second valve block and the balancing oil cylinder.

[0011] After adopting the above structure, the beneficial effects of the utility model are:

[0012] The utility model adopts an accumulator to store energy by converting the pressure energy in the hydraulic system into elastic potential energy. When the system needs additional pressure or flow, the accumulator can release the stored energy to provide the required pressure support. The release and charging and discharging processes of the accumulator can help balance the pressure in the system, reduce pressure fluctuations and shocks, and provide stable pressure, greatly improving the stability of the system. In addition, the release speed of the accumulator is relatively fast, which can quickly respond to system needs. By rationally designing and configuring the volume and installation position of the accumulator, the response speed of the system can be improved, making the counterweight operation more flexible and efficient.

[0013] After the oil pressure reaches the low pressure threshold, the pressure switch will give a low pressure signal alarm, the solenoid ball valve will be energized to open the oil channel, and the hydraulic pump station will start to supply oil and replenish the pressure. When the pressure reaches the high pressure threshold, the electrical signal of the solenoid ball valve will be disconnected, and the oil circuit will be cut off, so that the gantry counterweight can be maintained at the required counterweight balance pressure for a long time. The hydraulic pump station can be shut down and powered off as needed to save energy. The valve parts adopt low leakage components, and the pressure is guaranteed to be stable after the oil circuit is cut off by the solenoid ball valve, and it can be maintained for a certain period of time without charging. Only when the pressure is lower than the lower limit set by the pressure sensor, the motor pump group needs to be started for charging. Moreover, the upper and lower limits of the internal pressure of the accumulator corresponding to the balance oil cylinder at the upper and lower limits can fluctuate stably within a very small range, ensuring that the gantry screw rod will not be affected by the weight of the spindle head.

[0014] In the utility model, a service valve is provided between the oil circuit of the accumulator and the balancing oil cylinder, which is in a normally open state during use. Only when the system is under maintenance and overhaul, the service valve can be closed to disconnect the oil circuit, thereby facilitating the overhaul and maintenance of each component in the system.

[0015] The utility model is provided with an overflow valve as a safety device, which can automatically release the pressure when overpressure occurs, thereby preventing the entire device from being damaged in the event of misoperation and enhancing the safety of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the oil circuit principle diagram of the utility model.

[0017] Description of reference numerals:

[0018] 1. First valve block; 2. Solenoid ball valve; 3. Overflow valve; 4. Pressure gauge; 5. Pressure switch; 6. Second valve block; 7. Accumulator; 8. Service valve; 9. Balancing cylinder. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] See Figure 1 As shown, it includes a first valve block 1 and a second valve block 6, wherein the first valve block 1 and the second valve block 6 are respectively provided with oil passages, the oil inlet of the first valve block 1 is connected to the hydraulic pump station for oil supply, the oil outlet of the first valve block 1 is connected to the oil inlet of the second valve block 6, the oil outlet of the second valve block 6 is connected to the balancing oil cylinder 9, and a service valve 8 is installed on the oil pipe between the second valve block 6 and the balancing oil cylinder 9, the first valve block 1 is provided with an oil return passage connected to the oil passage and the oil tank at both ends, and an overflow valve 3 is provided in the oil return passage, and several accumulators 7 are installed on the second valve block 6, and the accumulators 7 are all connected to the oil passage in the second valve block 6, and the multiple valves are all low-leakage components;

[0021] A normally closed electromagnetic ball valve 2 is provided in the oil passage in the first valve block 1. A pressure switch 5 connected to the internal oil passage is installed on the first valve block 1. The pressure switch 5 is electrically connected to the electromagnetic ball valve 2. The set pressure of the relief valve 3 is the counterweight balance pressure + 15 bar; a pressure gauge 4 connected to the oil passage is installed on the first valve block 1.

[0022] The principle and use process of this utility model:

[0023] The pressure switch 5 in the system oil circuit and the normally closed electromagnetic ball valve 2 perform electrical closed-loop control. When the pressure at the rear end of the electromagnetic ball valve 2 reaches the low-pressure threshold, the pressure switch 5 issues a low-pressure signal alarm, the electromagnetic ball valve 2 is energized to open the oil channel, and the hydraulic pump station starts to supply oil and replenish the pressure. When the pressure reaches the high-pressure threshold, the pressure switch 5 triggers a high-pressure alarm signal, which disconnects the electrical signal of the electromagnetic ball valve 2. The ball valve closes and cuts off the oil circuit, so that the gantry counterweight maintains the required counterweight balance pressure for a long time. The hydraulic pump station can be shut down and powered off as needed to save energy.

[0024] The accumulator 7 stores energy by converting the pressure energy in the hydraulic system into elastic potential energy. When the system requires additional pressure or flow, the accumulator 7 can release the stored energy to provide the required pressure support. The release and charging and discharging process of the accumulator 7 can help balance the pressure in the system, reduce pressure fluctuations and shocks, and provide stable pressure, greatly improving the stability of the system. Moreover, the release speed of the accumulator 7 is relatively fast, which can quickly respond to system requirements. By reasonably designing and configuring the volume and installation position of the accumulator 7, the response speed of the system can be improved, making the counterweight operation more flexible and efficient. The inspection valve 8 between the oil circuit of the accumulator 7 and the balancing cylinder 9 in the system is normally open during use. Only when the system is under maintenance and inspection, the inspection valve 8 can be closed to disconnect the oil circuit, thereby facilitating the inspection and maintenance of various components in the system.

[0025] The overflow valve 3 in the system serves as a safety device, which can automatically release pressure when overpressure occurs, thereby preventing the entire device from being damaged due to improper operation.

[0026] It should be understood that the above-described specific embodiments of the present invention are merely illustrative of or explanation of the principles of the present invention and do not constitute limitations of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention shall be included within the scope of protection of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modifications that fall within the scope and metes and bounds of the appended claims, or equivalents of such scope and metes and bounds.

Claims

1. A gantry counterweight hydraulic system, comprising a first valve block (1) and a second valve block (6), wherein the first valve block (1) and the second valve block (6) are respectively provided with oil passages, and characterized in that: The oil inlet of the first valve block (1) is connected to the hydraulic pump station for oil supply, the oil outlet of the first valve block (1) is connected to the oil inlet of the second valve block (6), and the oil outlet of the second valve block (6) is connected to the balance oil cylinder (9). The first valve block (1) is provided with an oil return channel connected to the oil channel and the oil tank at both ends, and an overflow valve (3) is provided in the oil return channel. Several accumulators (7) are installed on the second valve block (6), and the accumulators (7) are all connected to the oil channel in the second valve block (6).

2. A gantry counterweight hydraulic system according to claim 1, characterized in that: An electromagnetic ball valve (2) is provided in the oil passage in the first valve block (1).

3. The gantry counterweight hydraulic system according to claim 2, characterized in that: A pressure switch (5) connected to an internal oil passage of the first valve block (1) is installed on the first valve block (1), and the pressure switch (5) is electrically connected to the electromagnetic ball valve (2).

4. The gantry counterweight hydraulic system according to claim 3, characterized in that: A pressure gauge (4) connected to the oil channel is installed on the first valve block (1).

5. The gantry counterweight hydraulic system according to claim 4, characterized in that: The set pressure of the overflow valve (3) is higher than the high pressure threshold of the pressure switch (5).

6. The gantry counterweight hydraulic system according to claim 5, characterized in that: A service valve (8) is installed on the oil pipe between the second valve block (6) and the balancing oil cylinder (9).

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