Exhaust oil injection system and its control method

Abstract

This invention relates to the technical field of hydraulic cylinder adjustment systems for air-pneumatic suspension systems, and provides an exhaust and oil injection system and its control method. The exhaust and oil injection system includes a drive unit, an oil injection unit, a position detection device, and a control device. The drive unit drives the cylinder to retract and exhaust air. The oil injection unit connects to the cylinder to inject oil into the rodless chamber of the cylinder. The exhaust and oil injection system includes an exhaust mode and an oil injection mode. The position detection device detects the cylinder's limit extension / retraction position and the calibrated oil injection position. The control device is connected to the position detection device. Based on the operating mode of the exhaust and oil injection system and the detection results of the position detection device, the control device controls the operating state of the drive unit and the oil injection unit, so that the piston rod of the cylinder reciprocates between its extension / retraction limit positions to exhaust air, or so that the piston rod of the cylinder precisely extends to the calibrated oil injection position. This greatly improves the exhaust effect of the exhaust and oil injection system and enables precise quantitative oil injection into the cylinder.

Description

Technical Field

[0001] This invention relates to the technical field of hydraulic cylinder adjustment systems for air suspension systems, and more particularly to an exhaust and oil injection system and its control method. Background Technology

[0002] Currently, hydropneumatic suspension cylinders are core components of suspension systems in engineering vehicles such as mining wide-body vehicles and military armored vehicles. Before leaving the factory, the hydropneumatic suspension cylinders need to be purged and quantitatively filled with oil. Afterwards, inert gases such as nitrogen are injected into the cylinders to ensure good shock absorption and support capabilities during vehicle operation. In existing technologies, the purging and filling limits of the hydropneumatic suspension cylinder piston rod are mostly controlled manually. This oil-filling and purging method has poor purging effect and is prone to errors in oil filling volume. Summary of the Invention

[0003] This invention provides an exhaust oil injection system and its control method to solve or improve the problems of poor exhaust effect and easy error in oil injection volume in existing exhaust oil injection methods.

[0004] According to a first aspect of the present invention, an exhaust oil injection system is provided, comprising a drive unit, an oil injection unit, a position detection device, and a control device.

[0005] The drive unit is used to drive the hydraulic cylinder to retract and vent air. The oil injection unit is connected to the hydraulic cylinder to inject oil into the rodless chamber of the hydraulic cylinder. The venting and oil injection system includes an venting mode and an oil injection mode. The position detection device is used to detect the limit extension / retraction position of the hydraulic cylinder and the calibrated oil injection position. The control device is connected to the position detection device and is used to control the working state of the drive unit and the oil injection unit based on the working mode of the venting and oil injection system and the detection result of the position detection device.

[0006] According to the present invention, an exhaust oil injection system includes an oil pump, an oil tank, and an oil source control valve. The oil source control valve is connected to the oil pump, the oil tank, and the rodless chamber of the oil cylinder.

[0007] The oil source control valve has a cylinder extension position and a cylinder retraction position. In the cylinder extension position, the oil pump is connected to the rodless chamber of the cylinder; in the cylinder retraction position, the oil tank is connected to the rodless chamber of the cylinder.

[0008] According to the present invention, an exhaust and oil injection system includes a drive unit comprising a cylinder, an air source control valve, and an air source. The cylinder is vertically arranged and located below the oil cylinder. The piston rod of the cylinder can push the piston rod of the oil cylinder to retract. The air source control valve is connected to the air source, the rod chamber, and the rodless chamber of the cylinder.

[0009] The air source control valve has a cylinder extension position and a cylinder retraction position. In the cylinder extension position, the rodless chamber of the cylinder is connected to the air source; in the cylinder retraction position, the rodless chamber of the cylinder is connected to the atmosphere.

[0010] According to the present invention, an exhaust oil injection system is provided, wherein the position detection device includes a first detection switch, a second detection switch and a third detection switch.

[0011] The first detection switch is used to detect the extended limit position of the hydraulic cylinder piston rod. The second detection switch is used to detect the retracted limit position of the hydraulic cylinder piston rod. The third detection switch is used to detect the oil filling calibration position of the hydraulic cylinder.

[0012] According to the present invention, an exhaust oil injection system is provided, wherein the control device is connected to the first detection switch, the second detection switch, the third detection switch, the air source control valve, the oil source control valve, and the oil pump, and is used to control the working state of the air source control valve, the oil source control valve, and the oil pump based on the working mode of the exhaust oil injection system and the detection results of the first detection switch and the second detection switch or the third detection switch.

[0013] According to the present invention, an exhaust oil injection system further includes a base and a limiting support frame.

[0014] The limiting support frame is connected above the base. The limiting support frame is used to support and limit the hydraulic cylinder. The cylinder is installed inside the base. The piston rod of the cylinder can pass through the base body and extend to the upper side of the base body.

[0015] According to the present invention, an exhaust and oil injection system includes a limiting support frame comprising a connecting rod, a limiting rod, a pair of auxiliary rods, a support plate, an adjusting sleeve, and a limiting plate.

[0016] The connecting rod and the limiting rod are diagonally arranged on the base. Each auxiliary rod is arranged diagonally on the base along the diagonal. An adjusting sleeve is movably fitted onto each connecting rod, the limiting rod, and / or each auxiliary rod. The bottom end of each adjusting sleeve is supported on the base. A support plate is movably fitted onto the connecting rod, the limiting rod, and / or each auxiliary rod and supported on the top end of each adjusting sleeve. The support plate has a through hole adapted to the hydraulic cylinder.

[0017] The top of each auxiliary tie rod is lower than the top of the connecting tie rod and the limiting tie rod. The limiting plate is rotatably connected to the connecting tie rod. The limiting plate is provided with a limiting clearance groove adapted to the limiting tie rod. The limiting clearance groove is used to limit the flip position of the limiting plate. The limiting tie rod is also provided with a limiting block. The limiting block can limit the position to the upper and lower sides of the limiting clearance groove.

[0018] According to the exhaust oil injection system provided by the present invention, a detection mounting rod is further provided on the base. The detection mounting rod is connected between the base body and the support plate. The first detection switch, the second detection switch, and the third detection switch are respectively connected to the detection mounting rod.

[0019] The piston rod of the cylinder is connected to a guide member at its outer end. The guide member is provided with an arc-shaped guide groove that matches the arc-shaped end of the piston rod of the cylinder.

[0020] According to a second aspect of the present invention, a control method for an exhaust oil injection system is provided, comprising the following steps:

[0021] Based on the detection results of the position detection device in the exhaust mode, the working state of the drive unit and the oil injection unit is controlled so that the piston rod of the oil cylinder reciprocates to the limit position and exhausts the air.

[0022] Based on the fact that the number of reciprocating extensions and retractions of the cylinder piston rod is greater than or equal to the target number of reciprocating extensions and retractions of the exhaust gas, and the cylinder piston rod is in the extreme retraction position, the exhaust gas oil injection system is controlled to switch to the oil injection mode. Based on the detection results of the position detection device in the oil injection mode, the working state of the drive unit and the oil injection unit is controlled so that the cylinder piston rod moves to the oil injection mark.

[0023] According to the control method of the exhaust oil injection system provided by the present invention, the step of controlling the working state of the drive unit and the oil injection unit based on the detection result of the position detection device in the exhaust mode, so as to make the piston rod of the oil cylinder reciprocate to the limit position and perform exhaust, specifically includes:

[0024] The hydraulic cylinder is hoisted and supported onto the limit support frame, and the first detection switch, the second detection switch and the third detection switch are moved to the target positions respectively.

[0025] The air supply control valve is switched to the cylinder extension position, causing the cylinder piston rod to drive the hydraulic cylinder piston rod to retract. Based on the second detection switch detecting that the hydraulic cylinder piston rod has retracted to its limit position, the air supply control valve is switched to the cylinder retraction position, and the hydraulic supply control valve is switched to the cylinder extension position. Based on the first detection switch detecting that the hydraulic cylinder piston rod has extended to its limit position, the hydraulic supply control valve is switched to the cylinder retraction position, and the air supply control valve is switched to the cylinder extension position, thus continuously repeating this cycle.

[0026] The steps of controlling the exhaust oil injection system to switch to oil injection mode based on the fact that the number of reciprocating extensions and retractions of the cylinder piston rod is greater than or equal to the target number of reciprocating extensions and retractions, and the cylinder piston rod is at its limit retraction position, and controlling the working state of the drive unit and the oil injection unit based on the detection result of the position detection device in the oil injection mode, so as to move the cylinder piston rod to the oil injection mark, specifically include:

[0027] The first and second detection switches detect that the number of reciprocating extensions and retractions of the cylinder piston rod is greater than or equal to the target number of reciprocating extensions and retractions, and the second detection switch detects that the cylinder piston rod is in its maximum retracted position. In these cases, the air supply control valve is switched to the cylinder retracted position, and the oil supply control valve is switched to the cylinder extended position. Based on the third detection switch detecting that the cylinder piston rod has moved to the oil filler mark, the oil pump is stopped.

[0028] The exhaust oil injection system provided by this invention includes a drive unit, an oil injection unit, a position detection device, and a control device. The drive unit can drive the piston rod of the hydraulic cylinder to retract. The oil injection unit can inject oil into the rodless chamber of the hydraulic cylinder to extend the piston rod. The position detection device can detect the cylinder's limit extension / retraction position and the calibrated oil injection position. Specifically, in exhaust mode, the position detection device detects the cylinder's limit extension / retraction position; in oil injection mode, the position detection device detects the cylinder's calibrated oil injection position. The control device can control the operating state of the drive unit and the oil injection unit based on the operating mode of the exhaust oil injection system and the detection results of the position detection device.

[0029] During operation, in exhaust mode, the control device controls the drive unit to retract the piston rod of the hydraulic cylinder to exhaust air. When the position detection device detects that the piston rod has retracted to its maximum retraction position, the control device controls the lubrication unit to extend the piston rod to exhaust air. When the position detection device detects that the piston rod has extended to its maximum extension position, the control device controls the drive unit to retract the piston rod to exhaust air, thus continuously repeating the cycle. In lubrication mode, the control device controls the lubrication unit to inject oil into the rodless chamber of the hydraulic cylinder. When the position detection device detects that the piston rod has extended to the calibrated lubrication position, the control device controls both the lubrication unit and the drive unit to stop working.

[0030] With this structural design, the position detection device can detect the cylinder's limit extension / retraction position and the calibrated oil filling level. Based on the operating mode of the exhaust-injection system and the detection results from the position detection device, the control device can control the operating state of the drive unit and the oil filling unit, causing the cylinder's piston rod to reciprocate between its extension / retraction limit positions to exhaust air, or to precisely extend the piston rod to the calibrated oil filling level. This greatly improves the exhaust efficiency of the exhaust-injection system and enables precise, quantitative oil filling of the cylinder. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the system structure of the exhaust oil injection system provided by the present invention;

[0033] Figure 2 This is a three-dimensional structural diagram of the base and limiting support frame in the exhaust oil injection system provided by the present invention. Figure 1 ;

[0034] Figure 3 This is a three-dimensional structural diagram of the base and limiting support frame in the exhaust oil injection system provided by the present invention. Figure 2 ;

[0035] Figure 4 This is a top view of the base and limiting support frame in the exhaust oil injection system provided by the present invention.

[0036] Figure label:

[0037] 100. Drive unit; 110. Cylinder; 120. Air source control valve; 130. Air source; 200. Oil injection unit; 210. Oil pump; 220. Oil tank; 230. Oil source control valve; 300. Control device; 400. Oil cylinder; 510. First detection switch; 520. Second detection switch; 530. Third detection switch; 540. Detection mounting rod; 610. Base; 621. Connecting rod; 622. Limiting rod; 623. Auxiliary rod; 624. Support plate; 625. Adjusting sleeve; 626. Limiting plate; 627. Limiting clearance groove; 628. Limiting block; 700. Guide component; 710. Arc-shaped guide groove; 800. Human-machine interface. Detailed Implementation

[0038] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0039] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0041] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0042] In the description of this specification, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate different embodiments or examples and features of different embodiments or examples described in this specification to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer. The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] The following is combined with Figures 1 to 4 An exhaust oil injection system and its control method provided by an embodiment of the present invention will be described. It should be understood that the following description is merely an illustrative embodiment of the present invention and does not constitute any particular limitation on the present invention.

[0044] An embodiment of the first aspect of the present invention provides an exhaust oil injection system, such as... Figure 1 As shown, the exhaust oil injection system includes a drive unit 100, an oil injection unit 200, a position detection device, and a control device 300.

[0045] The drive unit 100 drives the hydraulic cylinder 400 to retract and vent air. The oil injection unit 200 is connected to the hydraulic cylinder 400 to inject oil into the rodless chamber of the hydraulic cylinder 400. The venting and oil injection system includes an venting mode and an oil injection mode. The position detection device is used to detect the limit extension and retraction position of the hydraulic cylinder 400 and calibrate the oil injection position. The control device 300 is connected to the position detection device and is used to control the working state of the drive unit 100 and the oil injection unit 200 based on the working mode of the venting and oil injection system and the detection results of the position detection device.

[0046] The exhaust oil injection system provided by this invention includes a drive unit 100, an oil injection unit 200, a position detection device, and a control device 300. The drive unit 100 can drive the piston rod of the hydraulic cylinder 400 to retract. The oil injection unit 200 can inject oil into the rodless chamber of the hydraulic cylinder 400 to extend the piston rod. The position detection device can detect the limit extension / retraction position and the calibrated oil injection position of the hydraulic cylinder 400. Specifically, in exhaust mode, the position detection device detects the limit extension / retraction position of the hydraulic cylinder 400; in oil injection mode, the position detection device detects the calibrated oil injection position of the hydraulic cylinder 400. The control device 300 can control the operating state of the drive unit 100 and the oil injection unit 200 based on the operating mode of the exhaust oil injection system and the detection results of the position detection device.

[0047] During operation, in exhaust mode, the control device 300 controls the drive unit 100 to retract the piston rod of the hydraulic cylinder 400 to exhaust air. When the position detection device detects that the piston rod of the hydraulic cylinder 400 has retracted to its limit retraction position, the control device 300 controls the lubrication unit 200 to extend the piston rod of the hydraulic cylinder 400 to exhaust air. When the position detection device detects that the piston rod of the hydraulic cylinder 400 has extended to its limit extension position, the control device 300 controls the drive unit 100 to retract the piston rod of the hydraulic cylinder 400 to exhaust air, thus continuously repeating the cycle. In lubrication mode, the control device 300 controls the lubrication unit 200 to inject oil into the rodless chamber of the hydraulic cylinder 400. When the position detection device detects that the piston rod of the hydraulic cylinder 400 has extended to the calibrated lubrication position, the control device 300 controls both the lubrication unit 200 and the drive unit 100 to stop working.

[0048] With this structural design, the position detection device can detect the limit extension / retraction position of the hydraulic cylinder 400 and the calibrated oil filling level. Based on the operating mode of the exhaust-oil-injection system and the detection results from the position detection device, the control device 300 can control the operating state of the drive unit 100 and the oil filling unit 200, causing the piston rod of the hydraulic cylinder 400 to reciprocate between its extension / retraction limit positions to exhaust air, or to precisely extend the piston rod of the hydraulic cylinder 400 to the calibrated oil filling level. This greatly improves the exhaust efficiency of the exhaust-oil-injection system and enables precise quantitative oil filling of the hydraulic cylinder 400.

[0049] It should be noted that the exhaust oil injection system may also include a human-machine interface 800, which is connected to the control device 300. The control device 300 can control the operating state of the drive unit 100 and the oil injection unit 200 based on the detection results of the position detection device in a manually selected operating mode. The control device 300 can also automatically switch the exhaust oil injection system to the oil injection mode based on the number of reciprocating cycles of the piston rod of the cylinder 400 in the exhaust mode and the position of the piston rod. For example, the target number of reciprocating cycles for the exhaust of the cylinder 400 is set to 3. After the position detection device detects that the piston rod of the cylinder 400 has reciprocated 3 times between its extended limit position and its retracted limit position, and that the piston rod is in the retracted limit position, the control device 300 controls the exhaust oil injection system to switch to the oil injection mode, and in the oil injection mode controls the operating state of the drive unit 100 and the oil injection unit 200 to inject oil into the rodless chamber of the cylinder 400 until its piston rod extends to the calibrated oil injection position.

[0050] In one embodiment of the present invention, the oil injection unit 200 includes an oil pump 210, an oil tank 220, and an oil source control valve 230. The oil source control valve 230 is connected to the oil pump 210, the oil tank 220, and the rodless chamber of the oil cylinder 400.

[0051] The oil source control valve 230 has a cylinder extension position and a cylinder retraction position. In the cylinder extension position, the oil pump 210 is connected to the rodless chamber of the cylinder 400; in the cylinder retraction position, the oil tank 220 is connected to the rodless chamber of the cylinder 400.

[0052] Furthermore, in one embodiment of the present invention, the drive unit 100 includes a cylinder 110, an air source control valve 120, and an air source 130. The cylinder 110 is vertically arranged and located below the hydraulic cylinder 400. The piston rod of the cylinder 110 can push the piston rod of the drive hydraulic cylinder 400 to retract. The air source control valve 120 is connected to the air source 130, the rod-side chamber, and the rodless chamber of the cylinder 110.

[0053] The air source control valve 120 has a cylinder extension position and a cylinder retraction position. In the cylinder extension position, the rodless chamber of cylinder 110 is connected to the air source 130; in the cylinder retraction position, the rodless chamber of cylinder 110 is connected to the atmosphere. For example, cylinder 110 is a single-acting cylinder or a double-acting cylinder.

[0054] For example, such as Figure 1As shown, cylinder 110 and hydraulic cylinder 400 are coaxially arranged in the vertical direction. The piston rod of cylinder 110 is located below the piston rod of hydraulic cylinder 400. The rodless chamber of cylinder 110 is connected to air source 130 via air source control valve 120. For example, air source 130 includes an air pump. When cylinder 110 is a single-acting cylinder, a spring is installed in its rod chamber. In the extended position, air source 130 can fill the rodless chamber of the single-acting cylinder with gas, so that the gas pressure overcomes the spring force to drive its piston rod upward and push the piston rod of hydraulic cylinder 400 to retract upward. In the retracted position, the spring force drives the piston rod to retract inward, and the gas in the rodless chamber of the single-acting cylinder is discharged to the atmosphere. When cylinder 110 is a double-acting cylinder, both the rod and rodless chambers of cylinder 110 are connected to air source 130 via air source control valve 120. With the cylinder in the extended position, the air source 130 fills the rodless chamber of the cylinder 110 with air, and the gas in the rod chamber of the cylinder 110 is discharged to the atmosphere. With the cylinder in the retracted position, the air source 130 fills the rod chamber of the cylinder 110 with air, and the gas in the rodless chamber of the cylinder 110 is discharged to the atmosphere.

[0055] Oil pump 210 and oil tank 220 are connected to the rodless chamber of cylinder 400 via oil source control valve 230. In the extended position, oil pump 210 injects oil into the rodless chamber of cylinder 400 via oil source control valve 230, causing the piston rod of cylinder 400 to extend for venting or calibration oil injection. In the retracted position, oil tank 220 is connected to the rodless chamber of cylinder 400 via oil source control valve 230. When the piston rod of cylinder 110 pushes the piston rod of cylinder 400 upwards, oil or gas in the rodless chamber of cylinder 400 can be discharged into oil tank 220 via oil source control valve 230.

[0056] In actual operation, in exhaust mode, the air source control valve 120 is switched to the cylinder extension position and the oil source control valve 230 is switched to the cylinder retraction position. The air source 130 drives the piston rod of the cylinder to extend upward, thereby pushing the piston rod of the hydraulic cylinder 400 to retract upward. When the position detection device detects that the piston rod of the hydraulic cylinder 400 has moved to its retraction limit position, the air source control valve 120 is switched to the cylinder retraction position, and the piston rod of the cylinder 110 retracts. At the same time, the oil source control valve 230 is switched to the cylinder extension position, and the oil pump 210 drives the piston rod of the hydraulic cylinder 400 to extend downward. When the position detection device detects that the piston rod of the hydraulic cylinder 400 has moved to its extension limit position, the oil source control valve 230 is switched to the cylinder retraction position and the air source control valve 120 is switched to the cylinder extension position. This cycle repeats continuously to achieve the exhaust operation of the hydraulic cylinder 400.

[0057] When the position detection device detects that the piston rod of cylinder 400 has reciprocated between its extreme extension and retraction positions a number of times that the exhaust target reciprocation number has been reached, and the piston rod of cylinder 400 is at its retraction limit position, the exhaust oil injection system switches to the oil injection mode, switching the oil source control valve 230 to the cylinder extension position, so that the oil pump 210 injects oil into the rodless chamber of cylinder 400. When the position detection device detects that its piston rod has moved to the oil injection mark position, the oil pump 210 is turned off. Thus, the quantitative oil injection operation of cylinder 400 is completed.

[0058] Furthermore, existing technologies typically arrange hydraulic cylinders horizontally, which leads to poor exhaust performance. When impure exhaust air mixes into the cylinder, it affects the lifespan of the seals and results in poor cushioning, making the vehicle prone to bumps and affecting the driver's driving experience. Additionally, insufficient support on one side or in certain areas can cause suspension noises, tilting, or even rollovers. In the exhaust and oil injection system provided by this invention, because the hydraulic cylinder 400 is arranged vertically, the position of the oil injection and exhaust port and the buffer oil passage hole within the cylinder 400 are higher than the lowest point of the rod chamber of the cylinder 400, which greatly improves the exhaust performance of the cylinder 400.

[0059] In one embodiment of the present invention, the position detection device includes a first detection switch 510, a second detection switch 520 and a third detection switch 530.

[0060] The first detection switch 510 is used to detect the extension limit position of the piston rod of the hydraulic cylinder 400; the second detection switch 520 is used to detect the retraction limit position of the piston rod of the hydraulic cylinder 400; and the third detection switch 530 is used to detect the oil filling calibration position of the hydraulic cylinder 400.

[0061] Furthermore, in one embodiment of the present invention, the control device 300 is connected to the first detection switch 510, the second detection switch 520, the third detection switch 530, the air source control valve 120, the oil source control valve 230, and the oil pump 210, and is used to control the working state of the air source control valve 120, the oil source control valve 230, and the oil pump 210 based on the working mode of the exhaust oil injection system and the detection results of the first detection switch 510, the second detection switch 520, or the third detection switch 530.

[0062] For example, the first detection switch 510, the second detection switch 520 and the third detection switch 530 all include, but are not limited to, proximity switches or forming switches, and the positions of the first detection switch 510, the second detection switch 520 and the third detection switch 530 can be adjusted automatically according to actual needs.

[0063] In one embodiment of the present invention, the exhaust oil injection system further includes a base 610 and a limiting support frame.

[0064] A limiting support frame is connected above the base 610. The limiting support frame is used to support and limit the hydraulic cylinder 400. The cylinder 110 is installed inside the base 610, and the piston rod of the cylinder 110 can pass through the body of the base 610 and extend to the upper side of the body of the base 610.

[0065] Furthermore, in one embodiment of the present invention, the limiting support frame includes a connecting rod 621, a limiting rod 622, a pair of auxiliary rods 623, a support plate 624, an adjusting sleeve 625, and a limiting plate 626.

[0066] The connecting rod 621 and the limiting rod 622 are diagonally arranged on the base 610, and each auxiliary rod 623 is arranged diagonally on the base 610. An adjusting sleeve 625 is movably fitted onto each of the connecting rod 621, the limiting rod 622, and / or each auxiliary rod 623, with the bottom end of each adjusting sleeve 625 supported on the base 610. A support plate 624 is movably fitted onto the connecting rod 621, the limiting rod 622, and / or each auxiliary rod 623 and supported on the top end of each adjusting sleeve 625. The support plate 624 has through holes adapted to the hydraulic cylinder 400.

[0067] The top of each auxiliary tie rod 623 is lower than the top of the connecting tie rod 621 and the limiting tie rod 622. The limiting plate 626 is rotatably connected to the connecting tie rod 621. The limiting plate 626 is provided with a limiting clearance groove 627 that matches the limiting tie rod 622. The limiting clearance groove 627 is used to limit the flipping position of the limiting plate 626. The limiting tie rod 622 is also provided with a limiting block 628. The limiting block 628 can be limited to the upper and lower sides of the limiting clearance groove 627.

[0068] Specifically, such as Figures 2 to 4 As shown, the base 610 has a square seat structure. A hollow cavity is provided inside the base 610 for housing the cylinder 110. The piston rod of the cylinder 110 moves through the interior of the base 610 and is disposed on the upper side of the base 610.

[0069] The lower ends of the connecting rod 621 and the limiting rod 622 are both connected to the upper surface of the base 610, and they are located at opposite ends of the same diagonal line on the upper surface of the base 610. The lower ends of the two auxiliary rods 623 are also connected to the upper surface of the base 610, and they are located at opposite ends of the other diagonal line on the upper surface of the base 610. The inner sides of the two auxiliary rods 623, the connecting rod 621, and the limiting rod 622 form the receiving area of ​​the hydraulic cylinder 400.

[0070] In this embodiment, an adjusting sleeve 625 is movably fitted onto each of the connecting rod 621, the limiting rod 622, and each auxiliary rod 623. The length of the adjusting sleeve 625 is adjustable. The lower end of each adjusting sleeve 625 is supported on the upper surface of the base 610, and the upper ends of each adjusting sleeve 625 are located in the same plane. The support plate 624 is an annular plate. The support plate 624 has a first through hole, a second through hole, a third through hole, and a fourth through hole. The first through hole is adapted to the connecting rod 621, the second through hole is adapted to the limiting rod 622, the third through hole is adapted to one of the auxiliary rods 623, and the fourth through hole is adapted to the other auxiliary rod 623. The support plate 624 is movably fitted onto the connecting rod 621, the limiting rod 622, and the two auxiliary rods 623 through the first, second, third, and fourth through holes, and the lower surface of the support plate 624 is limited and supported by each adjusting sleeve 625. By adjusting the length of the adjusting sleeve 625, the support height of the hydraulic cylinder 400 can be adjusted, improving the versatility of the exhaust and oil injection system. The inner hole of the annular plate is a through hole adapted to the hydraulic cylinder 400. The lower end of the cylinder barrel of the hydraulic cylinder 400 can be limited and supported on the support plate 624, and the piston rod of the hydraulic cylinder 400 can pass through the through hole of the support plate 624 and move telescopically on the lower side of the support plate 624.

[0071] In this embodiment, the two auxiliary pull rods 623 are of equal length, and the connecting pull rod 621 and the limiting pull rod 622 are of equal length. The tops of the two auxiliary pull rods 623 are lower than the tops of the connecting pull rod 621 and the limiting pull rod 622. The lower height of the auxiliary pull rods 623 facilitates the hoisting of the hydraulic cylinder 400 into its accommodating area by the operator.

[0072] The upper end of the connecting rod 621 is rotatably connected to a limiting plate 626, which has a limiting clearance groove 627. The limiting plate 626 can be flipped relative to the connecting rod 621 to open or close the receiving area of ​​the hydraulic cylinder 400. When the limiting plate 626 is flipped outward, the limiting rod 622 can separate from the limiting clearance groove 627 to open the receiving area of ​​the hydraulic cylinder 400. When the limiting plate 626 is flipped inward, the limiting rod 622 can slide within the limiting clearance groove 627 until it is engaged at the inner end of the groove 627 to close the receiving area of ​​the hydraulic cylinder 400. A limiting block 628 is also provided on the limiting rod 622. For example, the limiting block 628 includes a first limiting nut and a second limiting nut, which are threaded to the limiting rod 622 respectively, and the first limiting nut and the second limiting nut are respectively limited to the upper and lower sides of the limiting plate 626.

[0073] During use, the limiting plate 626 is flipped open, and the upper part with the auxiliary pull rod 623 is hoisted into the receiving area of ​​the hydraulic cylinder 400. The lower end of the cylinder barrel of the hydraulic cylinder 400 is supported on the support plate 624. The limiting plate 626 is then flipped closed, so that the limiting plate 626 is positioned at the upper end of the cylinder barrel of the hydraulic cylinder 400. In other words, after the hydraulic cylinder 400 is installed in the receiving area, the cylinder barrel of the hydraulic cylinder 400 can be positioned between the support plate 624 and the limiting plate 626.

[0074] In one embodiment of the present invention, a detection mounting rod 540 is further provided on the base 610. The detection mounting rod 540 is connected between the base 610 body and the support plate 624. A first detection switch 510, a second detection switch 520 and a third detection switch 530 are respectively connected to the detection mounting rod 540.

[0075] A guide member 700 is connected to the outer end of the piston rod of cylinder 110. The guide member 700 is provided with an arc-shaped guide groove 710 that matches the arc-shaped end of the piston rod of cylinder 400.

[0076] like Figure 2 As shown, one end of the detection mounting rod 540 is connected to the upper surface of the base 610, and the other end of the detection mounting rod 540 is connected to the support plate 624 through it. A first detection switch 510, a third detection switch 530, and a second detection switch 520 are sequentially installed on the detection mounting rod 540 from bottom to top. The positions of the first detection switch 510, the second detection switch 520, and the third detection switch 530 can be adjusted according to actual needs. For example, multiple mounting holes are spaced apart on the detection mounting rod 540, allowing the first detection switch 510, the second detection switch 520, and the third detection switch 530 to be installed in different mounting holes to adjust their respective positions. Alternatively, the first detection switch 510, the second detection switch 520, and the third detection switch 530 can be slidably connected to the detection mounting rod 540. A locking device is also provided; after the first detection switch 510, the second detection switch 520, and the third detection switch 530 slide to the target position, the locking device locks them in place.

[0077] Furthermore, the piston rod end of the hydraulic cylinder 400 is arc-shaped. A guide member 700 is provided at the piston rod end of the cylinder 110, and an arc-shaped guide groove 710 adapted to the arc-shaped end is formed on the guide member 700. This improves the guiding performance of the hydraulic cylinder 400 during extension and retraction.

[0078] A second aspect of the present invention provides a control method for an exhaust oil injection system, comprising the following steps:

[0079] Based on the detection results of the position detection device in the exhaust mode, the working state of the drive unit 100 and the oil injection unit 200 is controlled so that the piston rod of the oil cylinder 400 reciprocates to the limit position and exhausts the air.

[0080] Based on the fact that the number of reciprocating extensions and retractions of the piston rod of the hydraulic cylinder 400 is greater than or equal to the target number of reciprocating extensions and retractions of the exhaust gas, and the piston rod of the hydraulic cylinder 400 is in the extreme retraction position, the exhaust gas oil injection system is controlled to switch to the oil injection mode. Based on the detection result of the position detection device in the oil injection mode, the working state of the drive unit 100 and the oil injection unit 200 is controlled so that the piston rod of the hydraulic cylinder 400 moves to the oil injection mark position.

[0081] In another embodiment of the present invention, the step of controlling the working state of the drive unit 100 and the oil injection unit 200 based on the detection result of the position detection device in the exhaust mode, so as to make the piston rod of the oil cylinder 400 reciprocate to the limit position and perform exhaust, specifically includes:

[0082] The hydraulic cylinder 400 is hoisted and supported onto the limit support frame, and the first detection switch 510, the second detection switch 520 and the third detection switch 530 are moved to the target positions respectively;

[0083] The air supply control valve 120 is switched to the cylinder extension position, causing the piston rod of cylinder 110 to drive the piston rod of hydraulic cylinder 400 to retract. Based on the second detection switch 520 detecting that the piston rod of hydraulic cylinder 400 has retracted to its limit position, the air supply control valve 120 is switched to the cylinder retraction position, and the hydraulic supply control valve 230 is switched to the cylinder extension position. Based on the first detection switch 510 detecting that the piston rod of hydraulic cylinder 400 has extended to its limit position, the hydraulic supply control valve 230 is switched to the cylinder retraction position, and the air supply control valve 120 is switched to the cylinder extension position, thus continuously cycling back and forth.

[0084] Based on the fact that the number of reciprocating extensions and retractions of the piston rod of hydraulic cylinder 400 is greater than or equal to the target number of reciprocating extensions and retractions of exhaust gas, and that the piston rod of hydraulic cylinder 400 is at its limit retraction position, the exhaust gas oil injection system is switched to the oil injection mode. Furthermore, based on the detection result of the position detection device in the oil injection mode, the working state of the drive unit 100 and the oil injection unit 200 is controlled. The specific steps for moving the piston rod of hydraulic cylinder 400 to the oil injection mark positioning include:

[0085] The first detection switch 510 and the second detection switch 520 detect that the number of reciprocating extensions and retractions of the piston rod of the hydraulic cylinder 400 is greater than or equal to the target number of reciprocating extensions and retractions of the exhaust gas. The second detection switch 520 detects that the piston rod of the hydraulic cylinder 400 is in the extreme retraction position. The control valve 120 is switched to the cylinder retraction position and the control valve 230 is switched to the cylinder extension position. Based on the detection of the third detection switch 530 that the piston rod of the hydraulic cylinder 400 has moved to the oil filling mark position, the control valve 210 is stopped.

[0086] Specifically, during use, the hydraulic cylinder 400 is first hoisted into its accommodating area, thereby limiting the support plate 624 and the limiting plate 626 to both sides of the cylinder barrel. Then, the first detection switch 510, the second detection switch 520, and the third detection switch 530 are moved to their respective target positions.

[0087] For example, in the initial state, the piston rod of cylinder 400 is at its extended limit position, the exhaust and oil injection system is in exhaust mode, and the control device 300 controls the air source control valve 120 to switch to the cylinder extension position and the oil source control valve 230 to switch to the cylinder retraction position, so that the piston rod of cylinder 110 extends upward and pushes the piston rod of cylinder 400 to retract. When the second detection switch 520 detects that the piston rod of cylinder 400 has retracted to its limit position, the control device 300 controls the air source control valve 120 to switch to the cylinder retraction position and the oil source control valve 230 to switch to the cylinder extension position, so that the piston rod of cylinder 110 retracts automatically, the rodless chamber of cylinder 400 is filled with oil, and the piston rod of cylinder 400 extends. When the first detection switch 510 detects that the piston rod of cylinder 400 has extended to its limit position, it controls the oil source control valve 230 to switch to the cylinder retraction position and the air source control valve 120 to switch to the cylinder extension position, thus continuously cycling back and forth.

[0088] When the first detection switch 510 and the second detection switch 520 detect that the number of reciprocating strokes of the piston rod of the hydraulic cylinder 400 is greater than or equal to the target number of reciprocating strokes of the exhaust system, the second detection switch 520 checks whether the piston rod of the hydraulic cylinder 400 is in the limit retraction position. If the piston rod of the hydraulic cylinder 400 is in the limit retraction position, the exhaust oil injection system is switched to the oil injection position; if the piston rod of the hydraulic cylinder 400 is not in the limit retraction position, the air source control valve 120 is switched to the cylinder extension position, and the oil source control valve 230 is switched to the cylinder retraction position, until the piston rod of the hydraulic cylinder 400 moves to the limit retraction position, and then the exhaust oil injection system is switched to the oil injection mode.

[0089] Subsequently, the air supply control valve 120 is switched to the cylinder retracted position and the oil supply control valve 230 is switched to the cylinder extended position, so that the oil pump 210 injects oil into the rodless chamber of the oil cylinder 400. When the third detection switch 530 detects that the piston rod of the oil cylinder 400 has moved to the position of the oil injection mark, the oil pump 210 is stopped.

[0090] Finally, the oil pipe is disassembled, and the limit plate 626 is opened to lift out the hydraulic cylinder 400. This completes the entire venting and oil filling operation of the hydraulic cylinder 400.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An exhaust oil injection system, characterized in that, Includes a drive unit, an oil injection unit, a position detection device, and a control device. The drive unit is used to drive the hydraulic cylinder to retract and vent air, the oil injection unit is used to connect with the hydraulic cylinder to inject oil into the rodless chamber of the hydraulic cylinder, the venting and oil injection system includes an venting mode and an oil injection mode, the position detection device is used to detect the limit extension and retraction position of the hydraulic cylinder and the calibrated oil injection position, and the control device is connected to the position detection device and is used to control the working state of the drive unit and the oil injection unit based on the working mode of the venting and oil injection system and the detection result of the position detection device. The oil injection unit includes an oil pump, an oil tank, and an oil source control valve. The oil source control valve is connected to the oil pump, the oil tank, and the rodless chamber of the oil cylinder. The oil source control valve has an oil cylinder extension position and an oil cylinder retraction position. In the oil cylinder extension position, the oil pump is connected to the rodless chamber of the oil cylinder; in the oil cylinder retraction position, the oil tank is connected to the rodless chamber of the oil cylinder. The drive unit includes a cylinder, an air source control valve, and an air source. The cylinder is vertically positioned below the hydraulic cylinder. The piston rod of the cylinder can push the piston rod of the hydraulic cylinder to retract. The air source control valve is connected to the air source, the rod chamber, and the rodless chamber of the cylinder. The air source control valve has a cylinder extension position and a cylinder retraction position. In the cylinder extension position, the rodless chamber of the cylinder is connected to the air source; in the cylinder retraction position, the rodless chamber of the cylinder is connected to the atmosphere. The position detection device includes a first detection switch, a second detection switch, and a third detection switch. The first detection switch is used to detect the extension limit position of the cylinder piston rod; the second detection switch is used to detect the retraction limit position of the cylinder piston rod; and the third detection switch is used to detect the oil filling calibration position of the cylinder. The control device is connected to the first detection switch, the second detection switch, the third detection switch, the gas source control valve, the oil source control valve, and the oil pump, and is used to control the working state of the gas source control valve, the oil source control valve, and the oil pump based on the working mode of the exhaust oil injection system and the detection results of the first detection switch and the second detection switch or the third detection switch. The exhaust oil injection system also includes a base and a limiting support frame. The limiting support frame is connected above the base. The limiting support frame is used to support and limit the oil cylinder. The cylinder is installed in the base, and the piston rod of the cylinder can pass through the base body and extend to the upper side of the base body. The limiting support frame includes a connecting rod, a limiting rod, a pair of auxiliary rods, a support plate, an adjusting sleeve, and a limiting plate. The connecting rod and the limiting rod are diagonally arranged on the base, and each of the auxiliary rods is arranged along the diagonal of the diagonals on the base. An adjusting sleeve is movably fitted onto each connecting rod, the limiting rod, and / or each of the auxiliary rods. The bottom end of each adjusting sleeve is supported on the base. A support plate is movably fitted onto the connecting rod, the limiting rod, and / or each of the auxiliary rods and supported on the top end of each adjusting sleeve. The support plate has a through hole adapted to the hydraulic cylinder. The top of each of the auxiliary pull rods is lower than the top of the connecting pull rod and the limiting pull rod. The limiting plate is rotatably connected to the connecting pull rod. The limiting plate is provided with a limiting clearance groove that is adapted to the limiting pull rod. The limiting clearance groove is used to limit the flip position of the limiting plate. The limiting pull rod is also provided with a limiting block. The limiting block can be limited to the upper and lower sides of the limiting clearance groove.

2. The exhaust oil injection system according to claim 1, characterized in that, The base is also provided with a detection mounting rod, which is connected between the base body and the support plate. The first detection switch, the second detection switch and the third detection switch are respectively connected to the detection mounting rod. The piston rod of the cylinder is connected to a guide member at its outer end, and the guide member is provided with an arc-shaped guide groove that matches the arc-shaped end of the piston rod of the cylinder.

3. A control method for an exhaust oil injection system as described in claim 1 or 2, characterized in that, Includes the following steps: Based on the detection results of the position detection device in the exhaust mode, the working state of the drive unit and the oil injection unit is controlled so that the piston rod of the oil cylinder reciprocates to the limit position and exhausts the air. Based on the fact that the number of reciprocating extensions and retractions of the cylinder piston rod is greater than or equal to the target number of reciprocating extensions and retractions of the exhaust gas, and the cylinder piston rod is in the extreme retraction position, the exhaust gas oil injection system is controlled to switch to the oil injection mode. Based on the detection results of the position detection device in the oil injection mode, the working state of the drive unit and the oil injection unit is controlled so that the cylinder piston rod moves to the oil injection mark.

4. The control method for the exhaust oil injection system according to claim 3, characterized in that, The step of controlling the working state of the drive unit and the oil injection unit based on the detection result of the position detection device in the exhaust mode, so as to make the piston rod of the oil cylinder reciprocate to the limit position and perform exhaust, specifically includes: The hydraulic cylinder is hoisted and supported onto the limit support frame, and the first detection switch, the second detection switch and the third detection switch are moved to the target positions respectively; The air source control valve is switched to the cylinder extension position so that the piston rod of the cylinder drives the piston rod of the hydraulic cylinder to retract. When the second detection switch detects that the piston rod of the hydraulic cylinder has retracted to the limit position, the air source control valve is switched to the cylinder retraction position and the hydraulic source control valve is switched to the cylinder extension position. When the first detection switch detects that the piston rod of the hydraulic cylinder has extended to the limit position, the hydraulic source control valve is switched to the cylinder retraction position and the air source control valve is switched to the cylinder extension position. This cycle repeats continuously. The steps of controlling the exhaust oil injection system to switch to oil injection mode based on the fact that the number of reciprocating extensions and retractions of the cylinder piston rod is greater than or equal to the target number of reciprocating extensions and retractions, and the cylinder piston rod is at its limit retraction position, and controlling the working state of the drive unit and the oil injection unit based on the detection result of the position detection device in the oil injection mode, so as to move the cylinder piston rod to the oil injection mark, specifically include: The first and second detection switches detect that the number of reciprocating extensions and retractions of the piston rod of the hydraulic cylinder is greater than or equal to the target number of reciprocating extensions and retractions of the exhaust gas. The second detection switch also detects that the piston rod of the hydraulic cylinder is in the extreme retraction position. The control valve switches the air source control valve to the cylinder retraction position and the oil source control valve to the cylinder extension position. Based on the third detection switch detecting that the piston rod of the hydraulic cylinder has moved to the oil filling mark position, the control valve stops the oil pump.

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