Intelligent automatic lubricating grease injection system

Abstract

This utility model relates to the technical field of lubricating oil injection systems, and in particular to an intelligent automatic lubricating grease injection system, comprising: an injection valve having a pilot oil chamber and a lubricating oil chamber, the lubricating oil chamber being connected to the bushing to be lubricated for lubrication, the pilot oil chamber being connected to a pilot oil pipe, the pilot oil being used to activate the injection valve to inject lubricating oil from the lubricating oil chamber into the bushing to be lubricated; a solenoid valve for receiving electrical signals from a control processor to achieve on / off switching; a pressure switch for receiving pressure signals from the working attachment and transmitting the signals to the control processor; and a control processor for counting or timing the signals from the pressure switch and converting them into voltage signals to act on the solenoid valve to achieve on / off switching of the solenoid valve. This system addresses the technical problems commonly found in existing lubrication systems, such as the inability to perform lubrication actions based on the number of working cycles and continuous working time of moving parts, as well as the complex structure and inconvenient installation and maintenance.

Description

Technical Field

[0001] This utility model relates to the technical field of lubricating oil injection systems, and in particular to an intelligent automatic lubricating grease injection system. Background Technology

[0002] Conventional mechanical equipment often requires lubrication points. Lubrication is achieved by injecting oil into these points in stages to lubricate the entire equipment and ensure its normal operation. Injecting too much lubricant is wasteful, while injecting too little will affect the equipment's normal operation. Currently, lubricant injection is done manually by the operator using a grease gun, which is time-consuming and labor-intensive, and cannot guarantee timely replenishment, missing the optimal time for lubrication injection.

[0003] A utility model patent with publication number CN211502288U discloses an automatic lubricating grease filling device. This device comprises a grease filling machine, a pressure regulating valve, an oil distributor, branch oil pipe assemblies, multiple metering valves, a pressure gauge, a reversing valve, and a control device. Each metering valve is equipped with an injection nozzle. The grease filling machine supplies grease to the oil distributor, which then distributes it to each branch oil pipe. Each branch oil pipe is equipped with a metering valve at its end. The device can meter the grease supply according to a pre-set filling amount, effectively monitor and provide quantitative feedback, and take corresponding measures to cut off the grease supply and open the reversing valve to allow the grease to return. Returning the grease to the grease dispenser for reuse avoids the risk of pipe rupture or damage to the dispensing equipment due to excessive pressure in the pipeline. It also eliminates the possibility of oversights and negligence caused by manual monitoring, making it safer and more reliable. However, the related technologies, including the above-mentioned solutions, still have many problems, such as: the inability to adjust the amount of lubricating grease for each component under different working conditions based on the different working frequencies of each action and the number of times each moving part works, so as to meet the lubrication needs of different working conditions; in addition, there are problems such as large installation space occupation, long installation time, and complex pipeline and control power line installation, resulting in high installation costs, low work efficiency, and inconvenience for inspection and maintenance. Utility Model Content

[0004] The purpose of this utility model is to provide an intelligent automatic lubrication system to solve the technical problems that existing lubrication systems generally cannot perform lubrication actions according to the number of working times and continuous working time of moving parts, as well as the problems of complex structure, inconvenient installation and maintenance.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An intelligent automatic lubrication system includes:

[0007] The oil injection valve is provided with a pilot oil chamber and a lubricating oil chamber. The lubricating oil chamber is connected to the bushing to be oiled for oil injection and lubrication. The pilot oil chamber is connected to a pilot oil pipe. The pilot oil is used to realize the action of the oil injection valve to inject the lubricating oil in the lubricating oil chamber into the bushing to be oiled.

[0008] The solenoid valve is used to receive electrical signals from the control processor to realize the on and off states. When it is energized, channel one is connected to the pilot oil chamber of the oil injection valve to input pilot oil. When it is de-energized, channel two is used to export the pilot oil from the pilot oil chamber for return oil.

[0009] A pressure switch is used to receive pressure signals from working attachments and transmit the signals to a control processor.

[0010] The control processor is used to count or time the signals from the pressure switch and convert them into voltage signals to act on the solenoid valve to realize the opening and closing of the solenoid valve.

[0011] Furthermore, the control processor includes a counting unit or a timing unit. The counting unit is used to count the electrical signal of the pressure switch and outputs an electrical signal to the solenoid valve when a set number of counts is reached. The timing unit is used to time the continuous electrical signal of the pressure switch and outputs an electrical signal to the solenoid valve when a set timing time is reached.

[0012] Furthermore, the pressure switch is a normally open pilot pressure switch, whose pilot oil circuit is connected to the pilot oil output pipeline of the working attachment to sense the pressure generated when the working attachment moves and convert the pressure into a closed signal to be transmitted to the control processor.

[0013] Furthermore, the solenoid valve is a two-position three-way valve. When it is energized, port K is connected to the pilot oil supply terminal P, and port K is connected to port H. Port H is connected to the pilot oil chamber M of the oil injection valve through a pipeline. At this time, the pilot oil return terminal T is disconnected. When it is de-energized, the pilot oil supply terminal P is disconnected, and port E is connected to port F. Port E is connected to the pilot oil return terminal T, and port F is connected to the pilot oil chamber M of the oil injection valve.

[0014] Furthermore, the pilot oil chamber and the lubricating oil chamber of the oil injection valve are separated by a piston. When the oil pressure in the pilot oil chamber of the piston increases, it pushes the piston to move and squeeze the lubricating oil in the lubricating oil chamber to open the one-way valve and squeeze the lubricating oil into the bushing to be oiled through the one-way valve. It also includes a grease cup, the outlet of which is connected to the lubricating oil chamber. When the piston moves and squeezes the lubricating oil chamber, it isolates the grease cup from the lubricating oil chamber. When the piston returns to its original position, the lubricating oil chamber and the grease cup are connected.

[0015] Furthermore, a one-way valve is provided between the lubricating oil chamber of the oil injection valve and the bushing to be oiled, which is used to prevent the lubricating oil of the bushing to be oiled from flowing back into the lubricating oil chamber.

[0016] Furthermore, the pressure switch has a closing pressure of 5.0 bar ± 1.0 bar and an opening pressure of 3.0 bar ± 1.0 bar.

[0017] Compared with the prior art, the technical solution of this utility model has the following beneficial effects:

[0018] (1). This utility model sets up a pressure switch and a solenoid valve, and uses the pilot characteristic of the pressure switch to realize the on-off control of the solenoid valve, thereby realizing the control of the oil injection action of the oil injection valve. The control processor is used to monitor the number of working times or the continuous working time of the working attachment, thereby realizing the on-off control of the solenoid valve, and realizing the oil injection action according to the number of working times or the continuous working time of the working attachment.

[0019] (2). This utility model uses a two-position three-way solenoid valve to switch between oil injection and return operations, which simplifies the oil injection structure and facilitates installation and maintenance. It is suitable for use in crushing series, screening series, mining series, quick connection series, vibration series, clamp series, demolition engineering series, collection and modification series, garden construction series, skid steer machinery and intelligent equipment series and other work fields. Attached Figure Description

[0020] Figure 1 This is a schematic diagram illustrating the principle and structure of the present invention during oil injection;

[0021] Figure 2 This is a schematic diagram illustrating the principle and structure of the present invention during oil absorption;

[0022] Figure 3 This is a schematic diagram of the structure of the oil injection valve of this utility model during oil injection;

[0023] Figure 4 This is a schematic diagram of the structure of the oil injection valve of this utility model when it is drawing oil.

[0024] In the diagram: 100, working attachment; 200, pressure switch; 300, control processor; 400, solenoid valve; 500, oil injection valve; 501, pilot oil chamber; 502, lubricating oil chamber; 503, piston; 504, return spring; 505, valve body; 506, valve sleeve; 507, check valve; 508, tail end; 600, grease cup; 700, bushing to be filled with oil. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent.

[0027] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to limit the embodiments of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0028] In the following description, when referring to the accompanying drawings, the same numbers in different drawings denote the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0029] In the description of this application, it should be understood that the terms "first," "second," "third," etc., are used only to distinguish similar objects and are not necessarily used to describe a specific order or sequence, nor should they be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0030] Furthermore, in the description of this application, unless otherwise stated, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0031] To address the limitations of existing technologies, this embodiment provides a technical solution. The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0032] This utility model mainly addresses the phenomenon in the prior art where excessive or insufficient lubrication during the operation of mechanical equipment leads to waste or affects the normal operation of the equipment, or the phenomenon where manual lubrication has low lubrication efficiency and cannot guarantee timely lubrication, resulting in equipment damage. The utility model has made the following technical improvements. It should be noted that the working attachment 100 in this utility model refers to a hydraulic cylinder or other hydraulic power component. The components that need lubrication are generally pins or bushings, etc., which need to move back and forth in coordination with the working attachment 100.

[0033] See appendix Figure 1 and attached Figure 2 An intelligent automatic lubrication system, comprising:

[0034] The oil injection valve 500 is provided with a pilot oil chamber 501 and a lubricating oil chamber 502. The lubricating oil chamber 502 is connected to the bushing 700 to be lubricated for lubrication. The pilot oil chamber 501 is connected to a pilot oil pipe, which is used to activate the oil injection valve 500 to inject the lubricating oil in the lubricating oil chamber 502 into the bushing 700 to be lubricated. Specifically, as shown... Figure 3 and Figure 4The diagrams show the structure of the oil injection valve 500 in its oil injection and oil suction states, respectively. The pilot oil chamber 501 and the lubricating oil chamber 502 of the oil injection valve 500 are separated by a piston 503. When the oil pressure in the pilot oil chamber 501 of the piston 503 increases, it pushes the piston 503 to move, squeezing out the lubricating oil and opening the one-way valve 507, thus squeezing the lubricating oil into the sleeve 700 to be injected. Specifically, the valve sleeve 506 is fixedly installed inside the valve body 505, and the grease cup 600 is installed on the valve body 505. A radial through hole is provided between the valve sleeve 506 and the valve body 505 to connect the inner cavity of the valve sleeve 506 and the inner cavity of the grease cup 600. The rod of the piston 503 passes through one end of the valve sleeve 506 and is sealed to the valve sleeve 506. A return spring 504 is fitted onto the rod of the piston 503, and the return spring 504 is limited by the tail end 508. One end of the return spring 504 is pressed against the tail end of the piston rod of the piston 503. 508, the other end is pressed against the valve sleeve. The end of piston 503, away from the rod, is inserted into the oil inlet of check valve 507. When the end of piston 503 enters the oil inlet of check valve 507, the oil pressure in the sealed cavity formed by piston 503 and oil inlet opens check valve 507, and oil flows out through check valve 507. The oil outlet of check valve 507 is connected to the oil-filled bushing 700. The structure of check valve 507 is relatively conventional, and will not be described in detail here. It can be understood that when pilot oil enters pilot oil chamber 501, the oil pressure increases and pushes piston 503 to squeeze lubricating oil chamber 502. Lubricating oil chamber 502 squeezes out lubricating oil to lubricate the oil-filled bushing 700. At this time, return spring 504 is in a compressed state. When pilot oil stops entering pilot oil chamber 501, under the reset action of return spring 504, piston 503 moves away from lubricating oil chamber 502. It also includes a grease cup 600, the outlet of which is connected to the lubricating oil chamber 502. When the piston 503 moves and squeezes the lubricating oil chamber 502, the grease cup 600 is isolated from the lubricating oil chamber 502. When the piston 503 returns to its original position, the lubricating oil chamber 502 is connected to the grease cup 600. It can be understood that when the piston 503 squeezes the lubricating oil chamber 502, the grease cup 600 is isolated from the lubricating oil chamber 502. At this time, the lubricating oil in the lubricating oil chamber 502 is squeezed out to lubricate the bushing 700 to be lubricated. When the piston 503 returns to its original position, the grease cup 600 is connected to the lubricating oil chamber 502. At this time, a one-way valve 507 is provided between the lubricating oil chamber 502 and the bushing 700 to be lubricated. Therefore, the lubricating oil in the lubricating oil chamber 502 is under negative pressure. At this time, the lubricating oil in the grease cup 600 is drawn into the lubricating oil chamber 502. A one-way valve 507 is provided between the lubricating oil chamber 502 of the oil injection valve 500 and the bushing 700 to be oiled. The one-way valve 507 is used to prevent the lubricating oil in the bushing 700 to be oiled from flowing back into the lubricating oil chamber 502.

[0035] Solenoid valve 400 receives electrical signals from control processor 300 to control its on / off state. When energized, channel one connects to allow pilot oil to enter the pilot oil chamber 501 of oil injection valve 500. When de-energized, channel two discharges the pilot oil from pilot oil chamber 501 for return. It can be understood that the hydraulic circuit of working attachment 100 includes a high-pressure hydraulic circuit and a low-pressure hydraulic circuit. The high-pressure hydraulic circuit is used for impact actions such as crushing and striking, while the low-pressure hydraulic circuit is the pilot oil circuit, used to output pilot oil for lubrication. Here, the pilot oil circuit can... The pressure switch 200 and the solenoid valve 400 are connected by a three-way valve. The solenoid valve 400 is a two-position three-way valve. When it is energized, the first channel is: port K is connected to the pilot oil supply terminal P, port K is connected to port H, and port H is connected to the M port of the pilot oil chamber 501 of the oil injection valve 500 through a pipeline. At this time, the pilot oil return terminal T is disconnected. When it is de-energized, the second channel is: the pilot oil supply terminal P is disconnected, port E is connected to port F, where port E is connected to the pilot oil return terminal T, and port F is connected to the M port of the pilot oil chamber 501 of the oil injection valve 500.

[0036] A pressure switch 200 is used to receive pressure signals from the working attachment 100 and transmit the signals to the control processor 300. The pressure switch 200 is a normally open hydraulic pilot pressure switch 200, whose pilot oil circuit is connected to the pilot oil output line of the working attachment 100 to sense the pressure generated when the working attachment 100 is in operation and convert the pressure into a closing signal to be transmitted to the control processor 300. The closing pressure of the pressure switch 200 is 5.0 bar ± 1.0 bar, and the opening pressure is 3.0 bar ± 1.0 bar. It can be understood that pressure switch 200 is normally in the open state. When the working attachment 100 is working, when the pressure in its pilot oil circuit reaches 5.0 bar ± 1.0 bar, pressure switch 200 closes. At this time, pressure switch 200 sends a closing signal to the control processor 300A port. If the pressure of pressure switch 200 remains above 5.0 bar ± 1.0 bar, meaning the working attachment 100 is working continuously, then control processor 300 starts timing. After the set time is reached, control processor 300 outputs a 24V electrical signal to port D. At this time, solenoid valve 400 receives the electrical signal output from port D, opens for 1.5 seconds, and then closes. The opening of solenoid valve 400 is the oil injection process. If the working attachment 100 operates intermittently... When pressure switch 200 is in a repetitive closed-open-closed state, control processor 300 counts the closing signals of pressure switch 200. When the set number of closing times is reached (which can be 10, 20, or 50 times, depending on the requirements), control processor 300 outputs a 24V electrical signal to port D. At this time, solenoid valve 400 receives the electrical signal output from port D, opens for 1.5 seconds, and then closes. The number of times the control processor 300 outputs the 24V electrical signal can also be set. For example, after the working attachment 100 has been working continuously for a set time, control processor 300 can continuously output a 24V working voltage signal to solenoid valve 400 three, five, or several times to achieve multiple oil injection actions. The control processor 300 is used to count or time the signal of the pressure switch 200 and convert it into a voltage signal to act on the solenoid valve 400 to realize the opening and closing of the solenoid valve 400. The control processor 300 includes a counting unit or a timing unit. The counting unit is used to count the electrical signal of the pressure switch 200 and outputs an electrical signal to the solenoid valve 400 when a set number of counts is reached. The timing unit is used to time the continuous electrical signal of the pressure switch 200 and outputs an electrical signal to the solenoid valve 400 when a set timing time is reached.The control processor 300 here uses a Siemens S7-300 PLC. The PLC is responsible for logic processing and decision-making (determining the output point state based on the counting / timing results). The digital output module (DO) of the control processor 300 is the necessary hardware to perform physical signal conversion (converting internal logic levels into external 24V switching signals). Through the above operations, the control processor can reliably convert the internal counting or timing signal state into a 24V voltage signal widely used in industrial settings to drive various actuators and indicating devices. Since how to process the counting or timing signal and convert it into a 24V working voltage signal for output is prior art known to those skilled in the art and is not the main inventive point of this application, it will not be described in detail here.

[0037] This utility model is applied to the oiling operation of equipment such as oiling bushings. When the working tool 100, i.e., the hydraulic power component such as the hydraulic cylinder, is working, it simultaneously sends a pilot oil pressure signal to the pressure switch 200. At this time, the pressure switch 200 changes from normally open to closed. The closing signal of the pressure switch 200 is transmitted to the control processor 300. If the closing signal of the pressure switch 200 is continuous, the control processor 300 starts timing; if the closing signal of the pressure switch 200 is intermittent, the control processor 300 starts counting. When the set time or number of times is reached, the control processor 300 outputs a 24V working voltage signal to the solenoid valve 400. At this time, the solenoid valve 400... When channel 00 is connected, the pilot oil from the pilot oil supply end is delivered to the pilot oil chamber 501 of the oil injection valve 500. The oil injection valve 500 operates to press the lubricating oil in the lubricating oil chamber 502 to the bushing 700 to be lubricated for lubrication. After 1.5 seconds, the solenoid valve 400 closes and switches to channel 2, at which point oil injection stops. During the reset process of the oil injection valve 500, the pilot oil in the pilot oil chamber 501 is squeezed back to the pilot oil return end. At this time, during the reset process of the oil injection valve 500, the lubricating oil chamber 502 is under negative pressure, which draws the lubricating oil in the grease cup 600 into the lubricating oil chamber 502. Both the pilot oil supply end and the pilot oil return end are connected to the pilot oil storage chamber, thus completing the oil injection and return actions.

[0038] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0039] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An intelligent automatic lubrication grease injection system, characterized in that, include: The oil injection valve (500) is provided with a pilot oil chamber and a lubricating oil chamber. The lubricating oil chamber is connected to the bushing (700) to be oiled for oil injection and lubrication. The pilot oil chamber is used to connect to the pilot oil pipe. The pilot oil is used to realize the action of the oil injection valve (500) to inject the lubricating oil in the lubricating oil chamber into the bushing (700) to be oiled. Solenoid valve (400) is used to receive electrical signals from control processor (300) to realize power on and off. When it is powered on, channel one is connected to the pilot oil chamber of the oil injection valve (500) to input pilot oil. When it is de-powered, channel two is used to export the pilot oil in the pilot oil chamber for return oil. A pressure switch (200) is used to receive the pressure signal from the working attachment (100) and transmit the signal to the control processor (300); the control processor (300) is used to count or time the signal from the pressure switch (200) and convert it into a voltage signal to act on the solenoid valve (400) to realize the opening and closing of the solenoid valve (400).

2. The intelligent automatic lubrication system according to claim 1, characterized in that, The control processor (300) includes a counting unit or a timing unit. The counting unit is used to count the electrical signal of the pressure switch (200) and outputs an electrical signal to the solenoid valve (400) when a set number of counts is reached. The timing unit is used to time the continuous electrical signal of the pressure switch (200) and outputs an electrical signal to the solenoid valve (400) when a set timing time is reached.

3. The intelligent automatic lubrication system according to claim 2, characterized in that, The pressure switch (200) is a normally open pilot pressure switch (200), whose pilot oil circuit is connected to the pilot oil output pipeline of the working attachment (100) to sense the pressure generated when the working attachment (100) moves and convert the pressure into a closed signal to be sent to the control processor (300).

4. The intelligent automatic lubrication system according to claim 3, characterized in that, The solenoid valve (400) is a two-position three-way valve. When it is energized, port K is connected to the pilot oil supply end P, and port K is connected to port H. Port H is connected to the pilot oil chamber M of the oil injection valve (500) through a pipeline. At this time, the pilot oil return end T is disconnected. When it is de-energized, the pilot oil supply end P is disconnected, and port E is connected to port F. Port E is connected to the pilot oil return end T, and port F is connected to the pilot oil chamber M of the oil injection valve (500).

5. The intelligent automatic lubrication grease injection system according to claim 4, characterized in that, The pilot oil chamber (501) and the lubricating oil chamber (502) of the oil injection valve (500) are separated by a piston (503). When the oil pressure in the pilot oil chamber (501) of the piston (503) increases, it pushes the piston (503) to move and squeeze the lubricating oil in the lubricating oil chamber to open the one-way valve (507) and squeeze the lubricating oil into the bushing (700) to be injected through the one-way valve (507). It also includes a grease cup (600). The outlet of the grease cup (600) is connected to the lubricating oil chamber. When the piston moves and squeezes the lubricating oil chamber, it isolates the grease cup (600) from the lubricating oil chamber. When the piston returns to its original position, the lubricating oil chamber is connected to the grease cup (600).

6. The intelligent automatic lubrication grease injection system according to claim 5, characterized in that, A one-way valve is provided between the lubricating oil chamber of the oil injection valve (500) and the bushing (700) to be oiled. The one-way valve is used to prevent the lubricating oil of the bushing (700) to be oiled from flowing back into the lubricating oil chamber.

7. The intelligent automatic lubrication grease injection system according to claim 6, characterized in that, The pressure switch (200) has a closing pressure of 5.0 bar ± 1.0 bar and an opening pressure of 3.0 bar ± 1.0 bar.

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