Hydraulic oil detecting and cleaning system and rotary drilling rig

Abstract

The utility model relates to a hydraulic oil detecting and cleaning system and a rotary drilling rig, and the hydraulic oil detecting and cleaning system comprises an oil return path which is configured to guide hydraulic oil in the system to flow back to an oil tank; the oil liquid detector and the speed regulating valve are connected to the detection oil way in series, and the speed regulating valve is configured to enable the flow entering the oil liquid detector to be kept stable; the filter is arranged on the oil return path and is used for filtering dirt in the oil return path; and the controller is electrically connected with the oil liquid detector and is configured to be capable of receiving a detection result of the oil liquid detector and controlling the state of the oil return path. The hydraulic oil detecting and cleaning system integrates the hydraulic oil pollution degree real-time detection function and the hydraulic oil cleaning function, the hydraulic oil filtering and cleaning function can be achieved, and the reasonable and economical oil change period is determined.

Description

Technical Field

[0001] The present application relates to the field of hydraulic technology, and in particular to a hydraulic oil detection and cleaning system and a rotary drilling rig. Background Art

[0002] A rotary drilling rig, also known as a pile driver, is a comprehensive drilling rig that is often used in construction environments such as civil engineering, and often operates in an open-air environment. Therefore, there is a lot of mud, water, dust and other dirt in the working environment. Rotary drilling rigs generally use a hydraulic transmission system. The hydraulic oil is not only used to transmit power, but also to lubricate and cool the hydraulic components. The dirt in the working environment can easily contaminate the hydraulic oil.

[0003] More than 70% of the faults in the hydraulic system of construction machinery are caused by hydraulic oil contamination. Therefore, the detection and control of hydraulic oil contamination is particularly important. Under normal conditions, the oil cleanliness of rotary drilling rigs should not be lower than NAS1638 9 level or ISO4406 20 / 18 / 15 level in the oil cleanliness classification standard. For oil with less contamination, a circulating machine can be used to filter the system oil. If the contamination exceeds the standard seriously, the hydraulic oil must be replaced.

[0004] Currently, hydraulic oil replacement is based on the maintenance time given by the OEM. Due to the lack of equipment that can detect the cleanliness of hydraulic oil and clean it in real time, the hydraulic oil is replaced too early or too late, resulting in oil waste or system failure.

[0005] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the application and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to ordinary technicians in the field. Utility Model Content

[0006] One of the purposes of the utility model is to provide a hydraulic oil detection and cleaning system and a rotary drilling rig, which are used for real-time detection of the contamination degree of the hydraulic oil.

[0007] A hydraulic oil detection and cleaning system, comprising:

[0008] An oil return line, configured to guide the hydraulic oil in the hydraulic system to be filtered and flow back to the hydraulic oil tank;

[0009] The detection oil circuit is connected in parallel with the oil return circuit;

[0010] An oil detector and a speed regulating valve, wherein the oil detector and the speed regulating valve are connected in series to the detection oil circuit, and the speed regulating valve is configured to control the flow rate of the detection oil circuit when the flow rate of the detection oil circuit fluctuates;

[0011] A filter is provided on the oil return line to filter dirt in the oil return line; and

[0012] The controller is electrically connected to the oil detector. The controller receives the detection result of the oil detector and controls the state of the oil return circuit: when the oil detector detects that the oil contamination degree exceeds the set threshold, the controller controls the oil return circuit to be open, otherwise the controller controls the oil return circuit to be open.

[0013] Furthermore, the aforementioned hydraulic oil detection and cleaning system also includes an overflow valve, which is connected in parallel with the detection oil circuit, and the overflow valve is configured to be able to regulate the working pressure of the oil detector.

[0014] Furthermore, a solenoid valve is connected in series to the aforementioned oil return line, and the solenoid valve is electrically connected to the controller. When the solenoid valve is energized, the oil return line is connected.

[0015] Furthermore, the aforementioned filter includes a filter element and a bypass valve connected in parallel with the filter element, and the bypass valve is configured to open when the filter element is blocked, so that a passage is formed in the return oil circuit.

[0016] Furthermore, the aforementioned filter also includes a pressure differential transmitter connected in parallel with the filter element, the pressure differential transmitter is connected to the controller, and is configured to be able to determine whether the filter element is blocked and send a blockage signal to the controller according to the blockage situation.

[0017] Furthermore, the aforementioned also includes a variable pump, which delivers hydraulic oil to the filter through an oil return line.

[0018] Furthermore, the aforementioned variable pump is connected to the oil return circuit via a proportional solenoid valve to change the hydraulic oil flow rate of the oil return circuit.

[0019] Furthermore, the aforementioned hydraulic oil detection and cleaning system also includes a human-machine interaction device, the oil detector is electrically connected to the human-machine interaction device, and the human-machine interaction device is configured to display the degree of oil contamination.

[0020] A rotary drilling rig comprises any one of the hydraulic oil detection and cleaning systems described above.

[0021] Based on the above technical solution, the utility model has at least the following beneficial effects:

[0022] 1. In some embodiments, the oil detector and the speed regulating valve are connected in series to the detection oil circuit. The speed regulating valve is configured to supplement the pressure when the oil circuit pressure fluctuates. When the system hydraulic pressure fluctuates, the speed regulating valve can maintain the flow through the oil detector unchanged, thereby improving the detection accuracy and precision of the oil detector. The system integrates hydraulic oil contamination detection and hydraulic oil cleaning functions, thereby improving the efficiency of hydraulic oil decontamination.

[0023] 2. In some embodiments, the filter element in the filter is connected in parallel with the bypass valve and the pressure differential indicator, respectively, to filter out dirt in the hydraulic oil. When the filter element is highly contaminated, the hydraulic oil is blocked and the internal pressure of the filter increases to reach the set pressure of the pressure differential indicator, the pressure differential indicator sends a blockage signal, and the bypass valve opens to relieve pressure in time to avoid damage to the filter element caused by excessive pressure. It can also promptly indicate the status of the filter element, guide the timely replacement of the filter element, and improve the cleaning efficiency of the hydraulic oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present disclosure 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 present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 This is a schematic diagram of the principle of the hydraulic oil detection and cleaning system provided by the utility model.

[0026] In the figure: 1-motor; 2-variable pump; 201-proportional solenoid valve; 3-speed control valve; 4-oil tester; 5-hydraulic oil tank; 6-overflow valve; 7-filter; 701-bypass valve; 702-pressure differential transmitter; 703-filter element; 8-solenoid valve. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use.

[0028] like Figure 1 As shown, in some embodiments, the hydraulic oil detection and cleaning system includes a hydraulic oil tank 5, a speed control valve 3, an oil detector 4, an oil return oil circuit, a detection oil circuit, a filter 7, a motor 1, a variable pump 2 and a proportional solenoid valve 8. When the oil is relatively clean, the variable pump 2 driven by the motor 1 has a smaller output flow and enters the speed control valve 3 first. The speed control valve 3 maintains a constant pressure difference between the inlet and outlet pressure control chambers through pressure compensation, so that the flow entering the oil detector 4 can obtain a stable flow when the hydraulic oil pressure fluctuates or the flow rate is low, thereby maintaining a constant output speed.

[0029] In some embodiments of the present application, the above-mentioned speed regulating valve can also be used in conjunction with a throttle valve. The throttle valve is used to set the minimum flow rate of the system, and the speed regulating valve is used to provide further rate control above the minimum flow rate set by the throttle valve. The throttle valve can be connected in parallel with a one-way valve.

[0030] After the oil flows to the oil detector 4 through the speed regulating valve 3, the oil detector 4 can detect the contamination degree of the oil, including the detection of the content of contamination particles, the content of water, etc.

[0031] In some embodiments of the present application, the detection oil circuit is connected in parallel with the return oil circuit. When the oil contamination level is low, the return oil circuit is open circuit, and only when cleaning is required does the return oil circuit become open circuit; while the detection oil circuit always remains open circuit to detect the oil contamination level in real time.

[0032] In some embodiments, the oil detector 4 is electrically connected to a human-computer interaction device, which includes a display device. A user can observe the degree of oil contamination through the display device. If the degree of oil contamination exceeds a threshold, the oil detector 4 outputs an alarm message to the human-computer interaction device, and the user can issue a cleaning instruction to the controller through the human-computer interaction device.

[0033] In some embodiments, the present application also includes a relief valve 6 connected in parallel with the detection oil circuit, and the relief valve 6 is configured to be able to regulate the working pressure of the oil detector 4. When the system pressure exceeds the value set by the relief valve 6, the relief valve 6 will open and the excess pressure oil will flow back to the hydraulic oil tank 5 through it, thereby maintaining the system pressure within a preset range, and at the same time providing safety protection for the detection oil circuit and the entire system to prevent damage to components such as filters and oil detectors.

[0034] In some embodiments, the oil detector 4 is connected to a controller, and a contamination level threshold is provided in the controller. When the oil contamination level detected by the oil detector 4 exceeds the threshold, the controller issues a cleaning instruction, and the controller makes the return oil circuit a passage and can control the flow of the return oil circuit.

[0035] In some embodiments, the return oil circuit is connected in series with a solenoid valve 8 electrically connected to the controller. The solenoid valve 8 can be a two-position two-way solenoid valve. When the power is off, a short circuit is formed in the valve. When the power is on, a passage is formed in the valve to change the return oil circuit to a conducting state.

[0036] In some embodiments, when the hydraulic oil contamination level exceeds a threshold or is cleaned by manual instructions, in response to the cleaning instruction of the controller, the variable pump 2 increases the amount of liquid flowing out of the oil; the proportional solenoid valve 8 controls the position of the valve core by controlling the current of the electromagnet therein, thereby opening or closing the flow channel to accurately control the flow or pressure. The variable pump 2 and the proportional solenoid valve 8 work together to adjust the flow and pressure of the fluid according to the change of the control signal. The controller controls the variable pump 2 to increase the current, increase the displacement of the variable pump 2, and increase the output flow of the variable pump 2; at the same time, the controller controls the solenoid valve 8 to be energized, so that the return oil circuit becomes a passage, so that the hydraulic oil flows through the filter 7 and enters the hydraulic oil tank 5, thereby achieving a clean filtering effect on the hydraulic oil. In some specific embodiments, the aforementioned variable pump 2 may include a plunger pump that changes the pump displacement by adjusting the stroke of the plunger.

[0037] In some embodiments, the filter 7 is composed of a bypass valve 701, a differential pressure transmitter 702, and a filter element 703, which are connected in parallel. The differential pressure transmitter 702 is connected to a controller, and the filter element 703 can filter fine particles and water and other dirt in the hydraulic oil. During the filtering process, when the filter element 703 is clogged by dirt and the internal pressure increases, reaching the set pressure of the differential pressure transmitter 702, the differential pressure transmitter 702 sends an alarm signal to the controller, prompting the user to replace the filter element 703, and at the same time, the bypass valve 701 is opened to unload the hydraulic oil pressure in the filter 7 to avoid damage to the filter element 703 caused by excessive pressure.

[0038] The solenoid valve 8 can make the oil pass through the filter 7 after being energized according to the control system instruction, thereby cleaning the oil.

[0039] Since the oil detector 4 is always working, when the cleaning is completed, if it is determined that the hydraulic oil is not suitable for use after filtering, the hydraulic oil can be replaced, so that the rotary drilling rig can be replaced in time and an economically reasonable oil change period can be determined.

[0040] In some embodiments, the rotary drilling rig includes a hydraulic system, a hydraulic oil tank 5 and the hydraulic oil detection and cleaning system as described above.

[0041] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood by specific circumstances.

[0042] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A hydraulic oil detection and cleaning system, characterized in that: include: An oil return line, configured to guide the hydraulic oil in the hydraulic system to be filtered and flow back to the hydraulic oil tank (5); A detection oil circuit connected in parallel with the oil return oil circuit; An oil detector (4) and a speed regulating valve (3), wherein the oil detector (4) and the speed regulating valve (3) are connected in series to a detection oil circuit, and the speed regulating valve (3) is configured to control the flow rate of the detection oil circuit when the flow rate of the detection oil circuit fluctuates; A filter (7) is arranged on the oil return line and is used to filter dirt in the oil return line; as well as A controller is electrically connected to the oil detector (4), and receives the detection result of the oil detector (4) and controls the state of the oil return circuit: when the oil detector (4) detects that the oil contamination degree exceeds a set threshold, the controller controls the oil return circuit to be open; otherwise, the controller controls the oil return circuit to be open.

2. The hydraulic oil detection and cleaning system according to claim 1, characterized in that: It comprises an overflow valve (6), the overflow valve (6) being connected in parallel with the detection oil circuit, and the overflow valve (6) being configured to be able to regulate the working pressure of the oil detector (4).

3. The hydraulic oil detection and cleaning system according to claim 1, characterized in that: A solenoid valve (8) is connected in series on the oil return line. The solenoid valve (8) is electrically connected to a controller. When the solenoid valve (8) is energized, the oil return line is open.

4. The hydraulic oil detection and cleaning system according to claim 1, characterized in that: The filter (7) comprises a filter element (703) and a bypass valve (701) connected in parallel with the filter element (703); the bypass valve (701) is configured to open when the filter element (703) is blocked, so that the oil return path forms a passage.

5. The hydraulic oil detection and cleaning system according to claim 4, characterized in that: The filter (7) further comprises a pressure difference transmitter (702) connected in parallel with the filter element (703); the pressure difference transmitter (702) is connected to the controller and is configured to determine whether the filter element (703) is clogged and to send a clogging signal to the controller according to the clogging condition.

6. The hydraulic oil detection and cleaning system according to claim 1, characterized in that: It also includes a variable pump (2), wherein the variable pump (2) delivers hydraulic oil to the filter (7) through an oil return line.

7. The hydraulic oil detection and cleaning system according to claim 6, characterized in that: The variable pump (2) is connected to the oil return circuit via a proportional solenoid valve (8) to change the flow rate of hydraulic oil in the oil return circuit.

8. The hydraulic oil detection and cleaning system according to any one of claims 1 to 7, characterized in that: The hydraulic oil detection and cleaning system further comprises a human-machine interaction device, the oil detector (4) is electrically connected to the human-machine interaction device, and the human-machine interaction device is configured to be able to display the degree of oil contamination.

9. A rotary drilling rig, characterized in that: It comprises a hydraulic oil detection and cleaning system as described in any one of claims 1 to 8.

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