Electric control liquid filling device and engineering machinery

Abstract

The invention discloses an electric control liquid filling device and engineering machinery. The electric control liquid filling device comprises a control module, a flow control module and a pressure detection module. The flow control module is connected into a liquid flow transmission pipeline, the flow control module is used for controlling the flow of the liquid flow transmission pipeline, and the liquid flow transmission pipeline is used for supplying liquid to an energy accumulator; the pressure detection module is arranged at an inlet of the energy accumulator and is used for detecting the liquid supply pressure at the inlet of the energy accumulator; the control module is electrically connected with the flow control module and the pressure detection module, and the control module is used for receiving the liquid supply pressure and adjusting the output flow of the flow control module according to the liquid supply pressure. According to the technical scheme provided by the embodiment of the invention, the liquid filling structure is optimized, and the control process is simple and efficient.

Description

Technical Field

[0001] This invention relates to the field of liquid filling technology, and in particular to an electrically controlled liquid filling device and engineering machinery. Background Technology

[0002] During the operation of construction machinery, it is necessary to pre-supply liquid to the accumulator so that the liquid can be stored in the accumulator under high pressure and quickly supplied when needed. Therefore, safe and efficient filling of the accumulator is crucial. However, existing solutions usually adopt a mechanical structure, which is complex in structure and control process, inconvenient in maintenance and troubleshooting, and has high operating costs. Summary of the Invention

[0003] This invention provides an electrically controlled liquid filling device and engineering machinery to solve the problems of complex liquid filling structure and control.

[0004] According to one aspect of the present invention, an electrically controlled liquid filling device is provided, characterized in that it comprises: a control module, a flow control module, and a pressure detection module;

[0005] The flow control module is connected to the liquid flow transmission pipeline, and the flow control module is used to control the flow rate of the liquid flow transmission pipeline, which is used to supply liquid to the accumulator.

[0006] The pressure detection module is located at the inlet of the accumulator and is used to detect the liquid supply pressure at the inlet of the accumulator.

[0007] The control module is electrically connected to the flow control module and the pressure detection module. The control module is used to receive the liquid supply pressure and adjust the output flow of the flow control module according to the liquid supply pressure.

[0008] Optionally, the flow control module includes: an electro-proportional flow valve;

[0009] The electro-proportional flow valve is connected to the liquid transmission pipeline through a first input terminal and a first output terminal. The control terminal of the electro-proportional flow valve is also electrically connected to the control module. The electro-proportional flow valve is used to adjust the flow rate of the liquid transmission pipeline according to the control signal of the control module.

[0010] Optionally, the second output terminal of the electro-proportional flow valve is connected to the oil tank for depressurization when the liquid supply stops at the first output terminal of the electro-proportional flow valve.

[0011] Optionally, the pressure detection module includes: a pressure sensor;

[0012] The pressure sensor is located at the inlet of the accumulator and is also electrically connected to the control module. The pressure sensor is used to detect the liquid supply pressure input at the inlet of the accumulator.

[0013] Optionally, the control module includes: a controller;

[0014] The controller is used to set the liquid supply pressure range, and when the liquid supply pressure is greater than the maximum value of the liquid supply pressure range, it controls the flow control module to stop the liquid supply output; when the liquid supply pressure is less than the minimum value of the liquid supply pressure range, it controls the flow control module to supply liquid.

[0015] Optionally, the electronically controlled liquid filling device further includes: a one-way valve connected in the liquid flow transmission pipeline and disposed between the flow control module and the pressure detection module;

[0016] The one-way valve is used to prevent liquid from leaking backwards in the liquid transmission pipeline when the electronically controlled liquid filling device stops supplying liquid to the accumulator.

[0017] Optionally, the electronically controlled liquid filling device further includes: a safety valve; the input end of the safety valve is connected to the inlet of the liquid flow transmission pipeline, and the output end of the safety valve is connected to the oil tank; the safety valve is used to release pressure when the inlet pressure of the liquid flow transmission pipeline is greater than the set pressure of the safety valve.

[0018] According to another aspect of the present invention, an engineering machine is provided, comprising: the electronically controlled liquid filling device described in any embodiment of the present invention.

[0019] The technical solution provided in this invention, by setting a pressure detection module, realizes the detection of the hydraulic pressure supplied to the liquid transmission pipeline. The control module controls the flow control module based on the supply pressure and the set maximum and minimum values ​​of the supply pressure, thereby realizing the flow regulation of the liquid transmission pipeline and, consequently, the pressure regulation at the accumulator inlet. This invention has a simple structure, low cost, is easy to program and adjust, and achieves automated flow control in the liquid transmission pipeline.

[0020] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of an electronically controlled liquid filling device according to an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of another electrically controlled liquid filling device provided according to an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure of another electrically controlled liquid filling device provided according to an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the structure of another electrically controlled liquid filling device provided according to an embodiment of the present invention. Detailed Implementation

[0026] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0027] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0028] This invention provides an electronically controlled liquid filling device. Figure 1 This is a schematic diagram of an electrically controlled liquid filling device provided in an embodiment of the present invention. (Reference) Figure 1The electrically controlled liquid filling device includes: a control module 1, a flow control module 2, and a pressure detection module 3. The flow control module 2 is connected to the liquid transmission pipeline and is used to control the flow rate in the pipeline, which supplies liquid to the accumulator 4. The pressure detection module 3 is located at the inlet of the accumulator 4 and is used to detect the liquid supply pressure at the accumulator inlet. The control module 1 is electrically connected to the flow control module 2 and the pressure detection module 3. The control module 1 receives the liquid supply pressure and adjusts the output flow rate of the flow control module 2 according to the liquid supply pressure.

[0029] The fluid transmission pipeline is used to supply fluid to the accumulator 4. For example, the fluid can be hydraulic oil, brake fluid, etc. To ensure the reliability of the fluid supply transmission pipeline, the fluid pressure in the fluid transmission pipeline needs to be regulated.

[0030] Specifically, the pressure detection module 3 can be set at the inlet of the accumulator 4 to detect the pressure at the inlet of the accumulator 4 and generate the liquid supply pressure. The liquid supply pressure at the inlet of the pressure accumulator 4 is the liquid supply pressure in the liquid flow transmission pipeline.

[0031] The control module 1 can be used to set the maximum and minimum values ​​of the hydraulic pressure. When the hydraulic pressure in the fluid transmission pipeline is not within the range of the maximum and minimum values ​​of the hydraulic pressure, the control module 1 generates a control signal and adjusts the flow control module 2, thereby adjusting the flow rate of the fluid transmission pipeline.

[0032] For example, when the supply pressure in the liquid transmission pipeline exceeds the maximum set supply pressure, control module 1 generates a control signal, and flow control module 2 shuts off according to the control signal, preventing liquid from continuing to be transmitted to accumulator 4, thereby controlling the higher supply pressure. When the supply pressure in the liquid transmission pipeline is less than the minimum set supply pressure, control module 1 generates a control signal, and flow control module 2 turns on according to the control signal, allowing liquid to continue being transmitted to accumulator 4, thereby increasing the supply pressure at the inlet of pressure accumulator 4 until it reaches the range between the maximum and minimum supply pressure.

[0033] During liquid supply and transmission, the control module 1 can also control the flow control module 2 to adaptively adjust the flow rate of the input liquid transmission pipeline, thereby achieving a safe and stable liquid supply and transmission effect.

[0034] The technical solution provided in this invention, by setting a pressure detection module, realizes the detection of the hydraulic pressure supplied to the liquid transmission pipeline. The control module controls the flow control module based on the supply pressure and the maximum and minimum values ​​of the set supply pressure, thereby realizing the flow regulation of the liquid transmission pipeline and, consequently, the pressure regulation at the accumulator inlet. This invention has a simple structure, low cost, is easy to program and adjust, and achieves automated flow control in the liquid transmission pipeline.

[0035] Figure 2 This is a schematic diagram of another electrically controlled liquid filling device provided in an embodiment of the present invention. (Refer to...) Figure 2 Based on the above embodiments, optionally, the flow control module 2 includes an electro-proportional flow valve 21. The electro-proportional flow valve 21 is connected to the liquid transmission pipeline through a first input terminal and a first output terminal. The control terminal of the electro-proportional flow valve 21 is also electrically connected to the control module. The electro-proportional flow valve 21 is used to adjust the flow rate of the liquid transmission pipeline according to the control signal of the control module.

[0036] The electro-proportional flow valve 21 can adjust its opening degree according to the control signal from the control module. When the control module controls the electro-proportional flow valve 21 to increase the flow rate in the liquid transmission pipeline, the electro-proportional flow valve 21 increases its opening degree. When the control module controls the electro-proportional flow valve 21 to decrease the flow rate in the liquid transmission pipeline, the electro-proportional flow valve 21 decreases its opening degree. When the control module controls the electro-proportional flow valve 21 to stop liquid transmission, the electro-proportional flow valve 21 reduces its opening degree to zero.

[0037] The electro-proportional flow valve provided in this embodiment of the invention has high reliability and can achieve high-precision flow and pressure regulation according to the control signal of the control module. It has high control accuracy and fast response speed, thus improving the regulation effect of flow regulation in liquid transmission pipelines.

[0038] Continue to refer to Figure 2 Based on the above embodiments, optionally, the second output end of the electro-proportional flow valve 21 is connected to the oil tank 5 for depressurization when the first output end of the electro-proportional flow valve stops supplying liquid.

[0039] The electro-proportional flow valve 21 can be a three-way valve, which can adjust the opening of the first output terminal according to the control signal from the control module. When the first output terminal of the electro-proportional flow valve 21 stops outputting, the electro-controlled filling device stops supplying liquid. There may be excessive pressure in the liquid transmission pipeline. At this time, the excess oil can be directly returned to the oil tank 5 through the second output terminal of the electro-proportional flow valve 21. This setting can significantly reduce the energy consumption of the electro-controlled filling device, reduce oil heating, and extend the oil life.

[0040] Continue to refer to Figure 2 The pressure detection module 3 includes a pressure sensor 31. The pressure sensor 31 is located at the inlet of the accumulator 4 and is also electrically connected to the control module. The pressure sensor 31 is used to detect the liquid supply pressure at the inlet of the accumulator 4.

[0041] The pressure sensor 31 is a key component for monitoring changes in liquid pressure within the fluid transmission pipeline. By converting the pressure signal into an electrical signal representing the hydraulic pressure, real-time monitoring and control of the hydraulic pressure can be achieved. This electrical signal is then fed back to the control module, which adjusts the opening of the electro-proportional flow valve 21 accordingly, thereby regulating the liquid pressure within the fluid transmission pipeline.

[0042] Based on the above embodiments, optionally, the control module includes a controller. The controller is used to set the liquid supply pressure range, and when the liquid supply pressure is greater than the maximum value of the liquid supply pressure range, it controls the flow control module to stop the liquid supply output; when the liquid supply pressure is less than the minimum value of the liquid supply pressure range, it controls the flow control module to supply liquid.

[0043] Figure 3 This is a schematic diagram of another electrically controlled liquid filling device provided in an embodiment of the present invention. (See reference) Figure 3 Based on the above embodiments, optionally, the electronically controlled liquid filling device further includes: a one-way valve 9, connected in the liquid flow transmission pipeline and disposed between the flow control module 2 and the pressure detection module 3. The one-way valve 9 is used to prevent the liquid in the liquid flow transmission pipeline from leaking backward when the electronically controlled liquid filling device stops supplying liquid to the accumulator 4.

[0044] To ensure the stable operation of the electrically controlled liquid filling device and prevent liquid backflow, a one-way valve 9 can be installed between the liquid flow transmission pipelines of the flow control module 2 and the pressure detection module 3. This ensures that the liquid output from the flow control module 2 can only be transmitted to the accumulator 4 through the one-way valve 9, and the liquid in the accumulator 4 cannot leak back into the flow control module 2 through the one-way valve 9. This allows the liquid supply pressure at the inlet of the accumulator 4 to remain stable and prevents changes in the liquid supply pressure due to backflow.

[0045] Continue to refer to Figure 3 Based on the above embodiments, optionally, the electronically controlled liquid filling device further includes: a safety valve 6; the input end of the safety valve 6 is connected to the inlet of the liquid flow transmission pipeline, and the output end of the safety valve 6 is connected to the oil tank 5; the safety valve 6 is used to release pressure when the inlet pressure of the liquid flow transmission pipeline is greater than the set pressure of the safety valve 6.

[0046] Among them, safety valve 6 can be used to ensure that the pressure in the liquid transmission pipeline does not exceed the set pressure it can withstand, thereby ensuring that the liquid transmission pipeline will not be damaged due to excessive pressure when the liquid is transmitted in the liquid transmission pipeline.

[0047] For example, the set pressure of safety valve 6 can be less than the maximum withstand pressure of the liquid transmission pipeline. This configuration improves the unloading speed of the electrically controlled liquid filling device, ensuring its safe and stable operation.

[0048] Figure 4 This is a schematic diagram of another electrically controlled liquid filling device provided in an embodiment of the present invention. (See reference) Figure 4 Based on the above embodiments, optionally, the electronically controlled liquid filling device further includes: an oil supply pump 7, connected to the inlet of the liquid flow transmission pipeline, for supplying liquid to the liquid flow transmission pipeline.

[0049] For example, the oil supply pump 7 may include an oil supply tank 71 and an oil supply motor M, which is used to draw liquid from the oil supply tank 71 and supply liquid to the liquid flow transmission pipeline.

[0050] Continue to refer to Figure 4 Based on the above embodiments, optionally, the electronically controlled liquid filling device further includes: a filter screen 8; connected between the oil supply pump 7 and the inlet of the liquid flow transmission pipeline, for filtering the liquid input into the liquid flow transmission pipeline.

[0051] To ensure the reliability of liquid transmission in the liquid transmission pipeline and the operational stability of the flow control module 2, a filter screen 8 can be installed at the inlet of the liquid transmission pipeline. This filters impurities in the liquid, thereby preventing blockage of the liquid transmission pipeline and the flow control module 2. At the same time, it also ensures the purity of the liquid transmitted to the accumulator 4, thereby improving the stable operation of subsequent liquid-using equipment.

[0052] This invention also provides an engineering machinery. This engineering machinery includes: the electrically controlled liquid filling device provided in any embodiment of this invention, which has similar beneficial effects to the electrically controlled liquid filling device, and will not be described in detail here.

[0053] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0054] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. An electrically controlled liquid filling device, characterized in that, include: Control module, flow control module, and pressure detection module; The flow control module is connected to the liquid flow transmission pipeline, and the flow control module is used to control the flow rate of the liquid flow transmission pipeline, which is used to supply liquid to the accumulator. The pressure detection module is located at the inlet of the accumulator and is used to detect the liquid supply pressure at the inlet of the accumulator. The control module is electrically connected to the flow control module and the pressure detection module. The control module is used to receive the liquid supply pressure and adjust the output flow of the flow control module according to the liquid supply pressure.

2. The electronically controlled liquid filling device according to claim 1, characterized in that, The flow control module includes: an electro-proportional flow valve; The electro-proportional flow valve is connected to the liquid transmission pipeline through a first input terminal and a first output terminal. The control terminal of the electro-proportional flow valve is also electrically connected to the control module. The electro-proportional flow valve is used to adjust the flow rate of the liquid transmission pipeline according to the control signal of the control module.

3. The electronically controlled liquid filling device according to claim 2, characterized in that, The second output terminal of the electro-proportional flow valve is connected to the oil tank and is used to release pressure when the liquid supply stops at the first output terminal of the electro-proportional flow valve.

4. The electronically controlled liquid filling device according to claim 1, characterized in that, The pressure detection module includes: a pressure sensor; The pressure sensor is located at the inlet of the accumulator and is also electrically connected to the control module. The pressure sensor is used to detect the liquid supply pressure input at the inlet of the accumulator.

5. The electrically controlled liquid filling device according to claim 1, characterized in that, The control module includes: a controller; The controller is used to set the liquid supply pressure range, and when the liquid supply pressure is greater than the maximum value of the liquid supply pressure range, it controls the flow control module to stop the liquid supply output; when the liquid supply pressure is less than the minimum value of the liquid supply pressure range, it controls the flow control module to supply liquid.

6. The electronically controlled liquid filling device according to claim 1, characterized in that, The electronically controlled liquid filling device further includes: a one-way valve, connected in the liquid flow transmission pipeline, and disposed between the flow control module and the pressure detection module; The one-way valve is used to prevent liquid from leaking backwards in the liquid transmission pipeline when the electronically controlled liquid filling device stops supplying liquid to the accumulator.

7. The electrically controlled liquid filling device according to claim 1, characterized in that, The electrically controlled liquid filling device further includes: a safety valve; the input end of the safety valve is connected to the inlet of the liquid flow transmission pipeline, and the output end of the safety valve is connected to the oil tank; the safety valve is used to release pressure when the inlet pressure of the liquid flow transmission pipeline is greater than the set pressure of the safety valve.

8. An engineering machinery, characterized in that, include: The electronically controlled liquid filling device according to any one of claims 1-7.

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