Oil supplementing system of high-position oil supplementing tank of hydraulic hoist and hydraulic hoist

Abstract

The utility model relates to an oil supplementing system of a high-position oil supplementing tank of a hydraulic hoist and the hydraulic hoist. The method is suitable for the technical field of water conservancy and hydropower engineering. The technical problem to be solved by the utility model is to provide an oil supplementing system of a high-position oil supplementing tank of a hydraulic hoist and the hydraulic hoist. According to the technical scheme, the oil recharging system of the high-position oil recharging tank of the hydraulic hoist is characterized by comprising an oil recharging pipeline communicated with a main oil tank and the high-position oil recharging tank; the proportional flow pump is arranged on an oil supplementing pipeline of the high-position oil supplementing tank and is used for pumping oil to the high-position oil supplementing tank; the temperature sensor is used for collecting the temperature of the oil liquid; the control unit is in communication connection with the temperature sensor and the proportional flow pump and used for adjusting the outlet flow of the proportional flow pump based on the oil liquid temperature change information collected by the temperature sensor within a certain period of time.

Description

Technical Field

[0001] The utility model relates to an oil replenishing system for a high-position oil replenishing tank of a hydraulic hoist, which is applicable to water conservancy and hydropower engineering and similar fields. Background Art

[0002] In water conservancy and hydropower projects, the unit water inlet accident (fast) gates are generally opened and closed by hydraulic gate hoists. When the gates are quickly lowered, it is a common arrangement to set up a high-level oil replenishment tank to replenish oil in the rodless cavity.

[0003] The existing hydraulic hoist high-level oil filling tank adopts pump-controlled oil filling, and the oil filling tank is equipped with high and low liquid level gauges. When the oil level in the oil filling tank is too low, the pump is started to fill the oil, and when the oil level in the oil filling tank is too high, the oil filling is stopped. This oil filling method can meet the requirements of conventional use, but in actual use, because the existing oil filling control method is too simple, when there is a sensor failure or improper oil pump selection, it is easy to cause excessive oil filling and oil leakage in the oil filling tank, which poses a safety hazard.

[0004] Since hydraulic gate hoists equipped with high-level oil replenishment tanks are mostly arranged outdoors, in areas with large temperature differences between day and night, the piston position offset caused by the temperature difference between day and night will be large, which will cause large fluctuations in the liquid level in the oil replenishment tank. The existing oil replenishment method cannot monitor the liquid level changes throughout the entire process, cannot dynamically adjust the oil replenishment flow, and cannot meet the requirements for safe monitoring and evaluation of the oil replenishment tank status. Utility Model Content

[0005] The technical problem to be solved by the utility model is: in view of the above-mentioned existing problems, an oil replenishing system for a high-position oil replenishing tank of a hydraulic hoist and a hydraulic hoist are provided.

[0006] The technical solution adopted by the utility model is: an oil replenishing system for a high-position oil replenishing tank of a hydraulic hoist, characterized in that it comprises:

[0007] An oil replenishment pipeline, connecting the main oil tank and the high-position oil replenishment tank;

[0008] A proportional flow pump, arranged on the oil replenishment pipeline of the high-position oil replenishment tank, for pumping oil to the high-position oil replenishment tank;

[0009] Temperature sensor, used to collect the temperature of the oil;

[0010] The control unit is connected to the temperature sensor and the proportional flow pump for adjusting the outlet flow of the proportional flow pump based on the oil temperature change information collected by the temperature sensor within a certain period of time.

[0011] Also includes:

[0012] A flow meter is provided corresponding to the proportional flow pump and is in communication connection with the control unit, and is used for collecting the oil flow rate pumped into the high-level oil replenishment tank by the proportional flow pump.

[0013] Also includes:

[0014] A liquid level collection module is arranged in the high-level oil replenishment tank and comprises a first liquid level collection unit, a second liquid level collection unit and a third liquid level collection unit;

[0015] Among them, the first liquid level collection unit can monitor the preset minimum liquid level and preset normal liquid level of the high-level oil replenishment tank; the second liquid level collection unit can monitor the preset normal liquid level and preset maximum liquid level of the high-level oil replenishment tank; the third liquid level collection unit can monitor the preset minimum liquid level and preset maximum liquid level of the high-level oil replenishment tank.

[0016] Also includes:

[0017] A respirator is arranged on the high-position oil replenishing tank.

[0018] It also includes an overflow pipeline and an overflow valve, wherein the overflow pipeline is connected to the oil replenishment pipeline, and the overflow valve is arranged on the overflow pipeline.

[0019] A hydraulic gate hoist equipped with a high-position oil replenishment tank is characterized by having the above-mentioned oil replenishment system.

[0020] The beneficial effect of the utility model is that the utility model obtains the oil temperature change information within a certain period of time through the temperature sensor, and adjusts the outlet flow of the proportional flow pump based on the temperature change information to adapt to the changes caused by thermal expansion and contraction, thereby ensuring the safety of oil replenishment under the condition of fast and efficient oil replenishment.

[0021] The utility model obtains the oil flow rate pumped into the high-level oil filling tank by the proportional flow pump through a flow meter, thereby realizing closed-loop control of the outlet flow rate of the proportional flow pump, ensuring that the oil flow rate actually pumped into the high-level oil filling tank by the proportional flow pump is substantially equal to the set flow rate.

[0022] In the utility model, the first liquid level acquisition unit can monitor the preset minimum liquid level and the preset normal liquid level of the high-level oil replenishment tank; the second liquid level acquisition unit can monitor the preset normal liquid level and the preset maximum liquid level of the high-level oil replenishment tank; the third liquid level acquisition unit can monitor the preset minimum liquid level and the preset maximum liquid level of the high-level oil replenishment tank, and they are alternatives to each other to avoid safety hazards caused by liquid level sensor failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the hydraulic hoist in the embodiment.

[0024] Figure 2 for Figure 1 Enlarged schematic diagram of part A in the middle.

[0025] Figure 3 for Figure 1 Enlarged schematic diagram of part B in the middle.

[0026] 1. High-level oil filling tank; 2. Flow meter; 3. Proportional flow pump; 4-1. First liquid level collection unit; 4-2. Second liquid level collection unit; 4-3. Third liquid level collection unit; 5. Respirator; 6. One-way valve; 7. Temperature sensor; 8. Pressure sensor; 9. Overflow valve. DETAILED DESCRIPTION

[0027] like Figure 1 As shown, this embodiment provides a hydraulic gate hoist equipped with a high-position oil replenishing tank. The oil replenishing system of the high-position oil replenishing tank of the hydraulic gate hoist has an oil replenishing pipeline, a proportional flow pump, a flow meter (an ultrasonic flow meter may be used), a liquid level acquisition module, an overflow pipeline, a temperature sensor and a control unit, etc.

[0028] In this example, the oil replenishing pipeline connects the main oil tank and the high-level oil replenishing tank of the hydraulic gate hoist. A proportional flow pump, a one-way valve and a flow meter are sequentially arranged on the oil replenishing pipeline from the main oil tank to the high-level oil replenishing tank. The proportional flow pump is used to pump the oil to the high-level oil replenishing tank to replenish the oil in the replenishing tank; the one-way valve prevents the oil in the replenishing tank from flowing back into the main oil tank; the flow meter is used to collect the oil flow rate pumped into the high-level oil replenishing tank by the proportional flow pump.

[0029] In this embodiment, the liquid level acquisition module is arranged in the high-level oil replenishment tank, and comprises a first liquid level acquisition unit, a second liquid level acquisition unit and a third liquid level acquisition unit (see Figure 2 ).

[0030] In this example, the first liquid level acquisition unit can monitor the preset minimum liquid level and preset normal liquid level of the high-level oil replenishment tank; the second liquid level acquisition unit can monitor the preset normal liquid level and preset maximum liquid level of the high-level oil replenishment tank; the third liquid level acquisition unit can monitor the preset minimum liquid level and preset maximum liquid level of the high-level oil replenishment tank, and can output 4~20mA analog signals.

[0031] In this embodiment, the first end of the overflow pipeline is connected between the one-way valve and the proportional flow pump on the oil replenishment pipeline, and the second end returns to the main oil tank. The overflow pipeline is provided with a temperature sensor, a pressure sensor and an overflow valve (see FIG. Figure 3 ).

[0032] In this example, the temperature sensor is used to collect the temperature of the oil in the oil replenishment pipeline; the pressure sensor is used to collect the pressure of the oil in the oil replenishment pipeline. The pressure sensor dynamically monitors the oil replenishment pressure. When the pressure is high, it can automatically overflow through the overflow valve to prevent the oil replenishment tank from damaging and leaking.

[0033] In this embodiment, the control unit is communicatively connected with the temperature sensor and the proportional flow pump to obtain the oil temperature information collected by the temperature sensor in real time, and based on the oil temperature change information collected by the temperature sensor within a certain period of time, the corresponding outlet flow change information is determined by comparing the preset correspondence between the oil temperature change information and the proportional flow pump outlet flow change information, thereby adjusting the outlet flow of the proportional flow pump.

[0034] In this embodiment, the temperature sensor is used to collect the oil temperature in real time, and the piston position offset caused by thermal expansion and contraction is estimated according to the temperature difference between day and night, so as to reasonably set the oil replenishment speed and avoid safety hazards.

[0035] In this example, the control unit is communicatively connected to the flow meter, and the flow meter sends the collected oil flow actually pumped to the make-up tank by the proportional flow pump to the control unit. The control unit compares the oil flow pumped to the make-up tank by the proportional flow pump with the flow determined by the control unit, and then realizes closed-loop control of the proportional flow pump outlet flow.

[0036] In this embodiment, the control unit can dynamically adjust the outlet flow of the proportional flow pump according to the real-time liquid level of the oil replenishment tank and the real-time reading of the flow meter to control the oil replenishment speed.

[0037] In this example, the control unit is connected to the liquid level acquisition module through communication. When the oil level in the replenishing tank is too low, the first and third liquid level acquisition units generate signals, and the control unit starts the proportional pump motor unit for replenishing oil to the replenishing tank; when the replenishing tank is filled to the normal level, the first and second liquid level acquisition units generate signals, and the proportional pump motor unit for replenishing oil stops running; when the liquid level in the replenishing tank continues to rise to the ultra-high alarm level, the second and third liquid level acquisition units generate signals, and the proportional pump motor unit for replenishing oil stops running. When the liquid level in the replenishing tank continues to rise to the ultra-high alarm level, the second and third liquid level acquisition units generate signals, and there should be an audible and visual alarm, and the pump should be stopped for maintenance.

[0038] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An oil replenishing system for a high-position oil replenishing tank of a hydraulic hoist, characterized in that: include: An oil replenishment pipeline, connecting the main oil tank and the high-position oil replenishment tank; A proportional flow pump, arranged on the oil replenishment pipeline of the high-position oil replenishment tank, for pumping oil to the high-position oil replenishment tank; Temperature sensor, used to collect the temperature of the oil; The control unit is connected to the temperature sensor and the proportional flow pump for adjusting the outlet flow of the proportional flow pump based on the oil temperature change information collected by the temperature sensor within a certain period of time.

2. The oil replenishing system of the high-position oil replenishing tank of the hydraulic hoist according to claim 1 is characterized in that: Also includes: A flow meter is provided corresponding to the proportional flow pump and is in communication connection with the control unit, and is used for collecting the oil flow rate pumped into the high-level oil replenishment tank by the proportional flow pump.

3. The oil replenishment system of the high-position oil replenishment tank of the hydraulic hoist according to claim 1 is characterized in that: Also includes: A liquid level collection module is arranged in the high-level oil replenishment tank and comprises a first liquid level collection unit, a second liquid level collection unit and a third liquid level collection unit; Among them, the first liquid level collection unit can monitor the preset minimum liquid level and preset normal liquid level of the high-level oil replenishment tank; the second liquid level collection unit can monitor the preset normal liquid level and preset maximum liquid level of the high-level oil replenishment tank; the third liquid level collection unit can monitor the preset minimum liquid level and preset maximum liquid level of the high-level oil replenishment tank.

4. The oil replenishing system of the high-position oil replenishing tank of the hydraulic hoist according to claim 1 is characterized in that: Also includes: A respirator is arranged on the high-position oil replenishing tank.

5. The oil replenishing system of the high-position oil replenishing tank of the hydraulic hoist according to claim 1 is characterized in that: It also includes an overflow pipeline and an overflow valve, wherein the overflow pipeline is connected to the oil replenishment pipeline, and the overflow valve is arranged on the overflow pipeline.

6. A hydraulic hoist equipped with a high-position oil replenishment tank, characterized in that: A lubrication system according to any one of claims 1 to 5.

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