CN111237264A - Oil circuit structure for precise control of double-acting cylinders - Google Patents

Oil circuit structure for precise control of double-acting cylinders Download PDF

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Publication number
CN111237264A
CN111237264A CN202010118992.3A CN202010118992A CN111237264A CN 111237264 A CN111237264 A CN 111237264A CN 202010118992 A CN202010118992 A CN 202010118992A CN 111237264 A CN111237264 A CN 111237264A
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oil
double
branch
branch pipe
acting
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CN111237264B (en
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方策
梅胜楷
李挺
吴武通
王杰
余舟
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Zhejiang Canaan Technology Ltd
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Zhejiang Canaan Technology Ltd
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Priority to PCT/CN2020/106075 priority patent/WO2021169175A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/027—Installations or systems with accumulators having accumulator charging devices
    • F15B1/033—Installations or systems with accumulators having accumulator charging devices with electrical control means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/024—Installations or systems with accumulators used as a supplementary power source, e.g. to store energy in idle periods to balance pump load
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/0401—Valve members; Fluid interconnections therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/149—Fluid interconnections, e.g. fluid connectors, passages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/202—Externally-operated valves mounted in or on the actuator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/08—Servomotor systems incorporating electrically operated control means
    • F15B21/087—Control strategy, e.g. with block diagram

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

The invention discloses an oil path structure for realizing the precise control of a double-acting oil cylinder, which comprises the double-acting oil cylinder, an oil inlet pipeline and an oil outlet pipeline, the oil inlet pipe comprises an oil inlet pipe, a first energy accumulator and a second energy accumulator, wherein one end of the oil inlet pipe is an oil inlet, the other end of the oil inlet pipe is provided with a first branch pipe and a second branch pipe, the first branch pipe is communicated with a rodless cavity, a first electromagnetic valve is arranged on the first branch pipe, the first energy accumulator and a first two-way flow control valve are arranged, the second energy accumulator is communicated with the first branch pipe, the second branch pipe is communicated with the rod cavity of a double-acting oil cylinder, a second electromagnetic valve is arranged on the second branch pipe, a second two-way flow control valve is arranged on the oil outlet pipe, one end of the oil outlet pipe is connected with an oil outlet, a third branch and a fourth branch are formed at the other end of the oil outlet pipe, a third electromagnetic valve is arranged on the third branch and communicated with the. The oil way can realize accurate control on the double-acting oil cylinder, has lower overall cost and is more beneficial to popularization and promotion.

Description

用于实现双作用油缸精确控制的油路结构Oil circuit structure for precise control of double-acting cylinders

技术领域technical field

本发明涉及油缸控制技术领域，尤其是一种用于实现双作用油缸精确控制的油路结构。The invention relates to the technical field of oil cylinder control, in particular to an oil circuit structure for realizing precise control of a double-acting oil cylinder.

背景技术Background technique

双作用油缸是指能由活塞的两侧输入压力油的液压缸。它被广泛应用于各种领域。但是双作用油缸由于自身输出难以精确控制，故难以被使用在精密加工领域中，例如在干法制粒机的加工生产环节中，通常需要对液压油缸活塞杆的移动精确控制，要求把活塞杆的移动控制在±0.5mm以内。为了实现这种精准控制，目前通常采用液压伺服控制可以实现伺服油缸活塞杆的移动得到精确控制。但是，由于伺服阀、电液比例阀和伺服油缸价格昂贵，所以这种控制方式性价比低，不能得到广泛的使用。Double-acting cylinders refer to hydraulic cylinders that can input pressure oil from both sides of the piston. It is widely used in various fields. However, the double-acting oil cylinder is difficult to be used in the field of precision machining because its own output is difficult to precisely control. The movement is controlled within ±0.5mm. In order to achieve this precise control, hydraulic servo control is usually used to achieve precise control of the movement of the piston rod of the servo cylinder. However, due to the high price of servo valves, electro-hydraulic proportional valves and servo cylinders, this control method is cost-effective and cannot be widely used.

发明内容SUMMARY OF THE INVENTION

针对现有技术的不足，本发明提供了一种用于实现双作用油缸精确控制的油路结构，可以实现对双作用油缸的精准控制，满足使用要求，同时结构简单利于实现，整体成本更低，更加利于普及推广。In view of the deficiencies of the prior art, the present invention provides an oil circuit structure for realizing the precise control of the double-acting oil cylinder, which can realize the precise control of the double-acting oil cylinder and meet the requirements of use, and at the same time, the structure is simple and convenient for realization, and the overall cost is lower. , more conducive to popularization.

为实现上述目的，本发明提供了一种用于实现双作用油缸精确控制的油路结构，包括双作用油缸、进油管路、出油管路、第一蓄能器、第二蓄能器，所述进油管路一端为进油口，另一端形成有第一支管和第二支管，所述第一支管与双作用油缸无杆腔连通，所述第一支管上设置有第一电磁阀，所述第一蓄能器通过第一两通流量控制阀与第一支管连通，所述第二蓄能器与第一支管连通并设置在第一电磁阀与无杆腔之间，所述第二支管与双作用油缸有杆腔连通，所述第二支管上设置有第二电磁阀，所述出油管路上设置有第二两通流量控制阀，所述出油管路一端与出油口连接，另一端形成有第三支流和第四支流，所述第三支流上设置有第三电磁阀，所述第三支流与第二支管连通形成第一连通口，所述第一连通口设置在第二电磁阀与双作用油缸有杆腔之间，所述第四支流与第一支管连通形成第二连通口，所述第四支流于第二连通口和第二两通流量控制阀之间设置有第四电磁阀。In order to achieve the above purpose, the present invention provides an oil circuit structure for realizing precise control of a double-acting oil cylinder, including a double-acting oil cylinder, an oil inlet pipeline, an oil outlet pipeline, a first accumulator, and a second accumulator, so One end of the oil inlet pipeline is an oil inlet, and the other end is formed with a first branch pipe and a second branch pipe, the first branch pipe is communicated with the rodless cavity of the double-acting oil cylinder, and a first solenoid valve is arranged on the first branch pipe, so The first accumulator communicates with the first branch pipe through the first two-way flow control valve, the second accumulator communicates with the first branch pipe and is arranged between the first solenoid valve and the rodless cavity, and the second accumulator communicates with the first branch pipe. The branch pipe is communicated with the rod cavity of the double-acting oil cylinder, the second branch pipe is provided with a second solenoid valve, the oil outlet pipe is provided with a second two-way flow control valve, and one end of the oil outlet pipe is connected with the oil outlet, The other end is formed with a third branch flow and a fourth branch flow, the third branch flow is provided with a third solenoid valve, the third branch flow is communicated with the second branch pipe to form a first communication port, and the first communication port is arranged on the first communication port. Between the second solenoid valve and the rod cavity of the double-acting oil cylinder, the fourth branch communicates with the first branch to form a second communication port, and the fourth branch is arranged between the second communication port and the second two-way flow control valve There is a fourth solenoid valve.

这样设置的有益效果是：设置成这种形式，在进油管路通入油液后，在第一蓄能器以及第二蓄能器积蓄能量，完成蓄能后，关闭第一电磁阀，在需要控制时，启动设备，使得第一蓄能器的压力与第二蓄能器的压力相等，就可以开设定或者调节双作用油缸的活塞杆位置。当需要控制双作用活塞精确向有杆腔方向移动时，第二电磁阀和第三电磁阀同时开启，并且将第二两通流量控制阀的开口设置的比第二两通流量控制阀开的的略大，所以，双作用油缸有杆腔排出的油量等于第二双通流量控制阀出排出的油量减去第一双通流量控制阀处排出的油量，由于第二双通流量控制阀与第一双通流量控制阀的开口相差极小，所以双作用油缸有杆腔排出的油量极小，双作用油缸有杆腔的压力油持续排出，使得有杆腔的压力逐渐降低，而无杆腔由于和第二蓄能器相连通，所以无杆腔的压力逐渐高于有杆腔，故活塞缓慢向有杆腔移动。进一步的可以在双作用气缸输出端设置一个位移传感器，位移传感器检测到活塞杆到达设定值时，控制电磁阀断电，活塞停止移动，同理的，当需要活塞向无杆腔方向移动时，第四电磁阀和第二电磁阀同时开启，双作用油缸的无杆腔压力逐渐下降，当有杆腔的压力超过无杆腔时，活塞缓慢向无杆腔移动。从而实现对双作用气缸输出轴的精准控制，并且该油路中位移传感器、电磁阀、流量控制阀、和蓄能器的组合，是需要控制的设备中常设的装置，例如位移传感器、电磁开关阀、流量控制阀、和蓄能器都是属于干法制粒机的必备部件，这样使用不会增加额外的设备成本，只需要设定PLC控制即可，这种结构也十分简单，利于实现，同时生产成本低，便于普及使用。The beneficial effect of this arrangement is: in this form, after the oil inlet pipeline is fed with oil, the first accumulator and the second accumulator accumulate energy, and after the energy accumulation is completed, the first solenoid valve is closed, and the When control is required, start the device so that the pressure of the first accumulator is equal to the pressure of the second accumulator, and then the position of the piston rod of the double-acting oil cylinder can be set or adjusted. When it is necessary to control the double-acting piston to move in the direction of the rod cavity precisely, the second solenoid valve and the third solenoid valve are opened at the same time, and the opening of the second two-way flow control valve is set to be more open than the second two-way flow control valve. is slightly larger, so the amount of oil discharged from the rod cavity of the double-acting cylinder is equal to the amount of oil discharged from the second two-way flow control valve minus the amount of oil discharged from the first two-way flow control valve. The opening difference between the control valve and the first double-pass flow control valve is very small, so the amount of oil discharged from the rod cavity of the double-acting cylinder is extremely small, and the pressure oil from the rod cavity of the double-acting cylinder is continuously discharged, so that the pressure of the rod cavity is gradually reduced. , and the rodless cavity is connected with the second accumulator, so the pressure of the rodless cavity is gradually higher than that of the rod cavity, so the piston moves slowly to the rod cavity. Further, a displacement sensor can be set at the output end of the double-acting cylinder. When the displacement sensor detects that the piston rod reaches the set value, the control solenoid valve is powered off and the piston stops moving. Similarly, when the piston needs to move in the direction of the rodless cavity , the fourth solenoid valve and the second solenoid valve are opened at the same time, and the pressure of the rodless cavity of the double-acting oil cylinder gradually decreases. When the pressure of the rod cavity exceeds the rodless cavity, the piston moves slowly to the rodless cavity. In this way, the precise control of the output shaft of the double-acting cylinder is realized, and the combination of the displacement sensor, solenoid valve, flow control valve, and accumulator in the oil circuit is a permanent device in the equipment that needs to be controlled, such as displacement sensor, electromagnetic switch. Valves, flow control valves, and accumulators are all necessary components of the dry granulator, so the use of this will not increase additional equipment costs, and only need to set PLC control. This structure is also very simple, which is conducive to the realization of , and at the same time, the production cost is low, and it is easy to popularize and use.

进一步地，所述第一支管上于第二蓄能器与双作用油缸之间设置有若干辅助蓄能器，所述辅助蓄能器通过电磁开关阀与第一支管连通。Further, a plurality of auxiliary accumulators are arranged on the first branch pipe between the second accumulator and the double-acting oil cylinder, and the auxiliary accumulators are communicated with the first branch pipe through an electromagnetic switch valve.

这样设置的有益效果是：再设置多个辅助蓄能器，由于常规的蓄能器，能够积蓄的压力有限，不能满足所有压力区间的要求，通过增加多个蓄能器，使得在不同的压力范围，可以开启多个辅助蓄能器，辅助维持需要的压力，这种结构简单，利于实现，提高整体结构的使用效果。The beneficial effect of this arrangement is that multiple auxiliary accumulators are set up again. Due to the limited pressure that can be accumulated in the conventional accumulators, it cannot meet the requirements of all pressure ranges. It is possible to open a plurality of auxiliary accumulators to assist in maintaining the required pressure. This simple structure is convenient for implementation and improves the use effect of the overall structure.

进一步地，所述进油管路上还连接有第一流量传感器，所述第四支流上于第二连通口位置连接有第二流量传感器。Further, the oil inlet pipeline is also connected with a first flow sensor, and the fourth branch is connected with a second flow sensor at the position of the second communication port.

这样设置的有益效果是：设置流量传感器可以实时监控对应位置的流量信息，便于使用者获取数据，了解油路中的油压情况，提高整体油路结构的使用效果。The beneficial effect of this setting is that the flow sensor can be set up to monitor the flow information of the corresponding position in real time, which is convenient for the user to obtain data, understand the oil pressure in the oil circuit, and improve the use effect of the overall oil circuit structure.

附图说明Description of drawings

图1为本发明实施例的油路结构示意图。FIG. 1 is a schematic diagram of an oil circuit structure according to an embodiment of the present invention.

具体实施方式Detailed ways

本发明用于实现双作用油缸精确控制的油路结构的实施例如图1所示：包括双作用油缸1、进油管路2、出油管路3、第一蓄能器71、第二蓄能器72，所述进油管路2一端为进油口，另一端形成有第一支管21和第二支管22，所述第一支管21与双作用油缸1无杆腔连通，所述第一支管21上设置有第一电磁阀41，所述第一蓄能器71通过第一两通流量控制阀61与第一支管21连通，所述第二蓄能器72与第一支管21连通并设置在第一电磁阀41与无杆腔之间，所述第二支管22与双作用油缸1有杆腔连通，所述第二支管22上设置有第二电磁阀42，所述出油管路3上设置有第二两通流量控制阀62，所述出油管路3一端与出油口连接，另一端形成有第三支流31和第四支流32，所述第三支流31上设置有第三电磁阀43，所述第三支流31与第二支管22连通形成第一连通口，所述第一连通口设置在第二电磁阀42与双作用油缸1有杆腔之间，所述第四支流32与第一支管21连通形成第二连通口，所述第四支流32于第二连通口和第二两通流量控制阀62之间设置有第四电磁阀44。这样设置的有益效果是：设置成这种形式，在进油管路2通入油液后，在第一蓄能器71以及第二蓄能器72积蓄能量，完成蓄能后，关闭第一电磁阀41，在需要控制时，启动设备，使得第一蓄能器71的压力与第二蓄能器72的压力相等，就可以开设定或者调节双作用油缸1的活塞杆位置。当需要控制双作用活塞精确向有杆腔方向移动时，第二电磁阀42和第三电磁阀43同时开启，并且将第二两通流量控制阀62的开口设置的比第二两通流量控制阀62开的的略大，所以，双作用油缸1有杆腔排出的油量等于第二双通流量控制阀出排出的油量减去第一双通流量控制阀处排出的油量，由于第二双通流量控制阀与第一双通流量控制阀的开口相差极小，所以双作用油缸1有杆腔排出的油量极小，双作用油缸1有杆腔的压力油持续排出，使得有杆腔的压力逐渐降低，而无杆腔由于和第二蓄能器72相连通，所以无杆腔的压力逐渐高于有杆腔，故活塞缓慢向有杆腔移动。进一步的可以在双作用气缸输出端设置一个位移传感器，位移传感器检测到活塞杆到达设定值时，控制电磁阀断电，活塞停止移动，同理的，当需要活塞向无杆腔方向移动时，第四电磁阀44和第二电磁阀42同时开启，双作用油缸1的无杆腔压力逐渐下降，当有杆腔的压力超过无杆腔时，活塞缓慢向无杆腔移动。从而实现对双作用气缸输出轴的精准控制，并且该油路中位移传感器、电磁阀、流量控制阀、和蓄能器的组合，是需要控制的设备中常设的装置，例如位移传感器、电磁开关阀45、流量控制阀、和蓄能器都是属于干法制粒机的必备部件，这样使用不会增加额外的设备成本，只需要设定PLC控制即可，这种结构也十分简单，利于实现，同时生产成本低，便于普及使用。An example of an oil circuit structure for realizing precise control of a double-acting oil cylinder according to the present invention is shown in FIG. 72. One end of the oil inlet pipeline 2 is an oil inlet, and the other end is formed with a first branch pipe 21 and a second branch pipe 22. The first branch pipe 21 communicates with the rodless cavity of the double-acting oil cylinder 1. The first branch pipe 21 A first solenoid valve 41 is provided on the upper part, the first accumulator 71 communicates with the first branch pipe 21 through the first two-way flow control valve 61, and the second accumulator 72 communicates with the first branch pipe 21 and is arranged in the Between the first solenoid valve 41 and the rodless cavity, the second branch pipe 22 communicates with the rod cavity of the double-acting oil cylinder 1 , the second branch pipe 22 is provided with a second solenoid valve 42 , and the oil outlet pipe 3 A second two-way flow control valve 62 is provided, one end of the oil outlet pipeline 3 is connected to the oil outlet, and the other end is formed with a third branch 31 and a fourth branch 32, and the third branch 31 is provided with a third electromagnetic valve 43, the third branch 31 communicates with the second branch pipe 22 to form a first communication port, the first communication port is arranged between the second solenoid valve 42 and the rod cavity of the double-acting oil cylinder 1, the fourth branch 32 communicates with the first branch pipe 21 to form a second communication port, and a fourth solenoid valve 44 is arranged between the second communication port and the second two-way flow control valve 62 of the fourth branch 32 . The beneficial effect of this arrangement is: in this form, after the oil inlet pipeline 2 is fed with oil, energy is accumulated in the first accumulator 71 and the second accumulator 72, and after the energy accumulation is completed, the first electromagnetic field is turned off. When the valve 41 needs to be controlled, the device is activated so that the pressure of the first accumulator 71 is equal to the pressure of the second accumulator 72, and the piston rod position of the double-acting oil cylinder 1 can be set or adjusted by opening. When it is necessary to control the double-acting piston to move precisely in the direction of the rod cavity, the second solenoid valve 42 and the third solenoid valve 43 are opened at the same time, and the opening of the second two-way flow control valve 62 is set higher than that of the second two-way flow control valve. The valve 62 is opened slightly larger, so the amount of oil discharged from the rod cavity of the double-acting oil cylinder 1 is equal to the amount of oil discharged from the second two-way flow control valve minus the oil discharged from the first two-way flow control valve. The difference between the openings of the second two-way flow control valve and the first two-way flow control valve is very small, so the amount of oil discharged from the rod cavity of the double-acting oil cylinder 1 is extremely small, and the pressure oil from the rod cavity of the double-acting oil cylinder 1 is continuously discharged, so that the The pressure of the rod chamber is gradually reduced, and the rodless chamber is connected to the second accumulator 72, so the pressure of the rodless chamber is gradually higher than that of the rod chamber, so the piston moves slowly to the rod chamber. Further, a displacement sensor can be set at the output end of the double-acting cylinder. When the displacement sensor detects that the piston rod reaches the set value, the control solenoid valve is powered off and the piston stops moving. Similarly, when the piston needs to move in the direction of the rodless cavity , the fourth solenoid valve 44 and the second solenoid valve 42 are opened at the same time, the pressure of the rodless cavity of the double-acting oil cylinder 1 gradually decreases, and when the pressure of the rod cavity exceeds the rodless cavity, the piston moves slowly to the rodless cavity. In this way, the precise control of the output shaft of the double-acting cylinder is realized, and the combination of the displacement sensor, solenoid valve, flow control valve, and accumulator in the oil circuit is a permanent device in the equipment that needs to be controlled, such as displacement sensor, electromagnetic switch. The valve 45, the flow control valve, and the accumulator are all necessary components of the dry granulator, so the use will not increase the extra equipment cost, only need to set the PLC control, this structure is also very simple, which is beneficial to At the same time, the production cost is low, and it is easy to popularize and use.

进一步地，所述第一支管21上于第二蓄能器72与双作用油缸1之间设置有若干辅助蓄能器73，所述辅助蓄能器73通过电磁开关阀45与第一支管21连通。这样设置的有益效果是：再设置多个辅助蓄能器73，由于常规的蓄能器，能够积蓄的压力有限，不能满足所有压力区间的要求，通过增加多个蓄能器，使得在不同的压力范围，可以开启多个辅助蓄能器73，辅助维持需要的压力，这种结构简单，利于实现，提高整体结构的使用效果。Further, a plurality of auxiliary accumulators 73 are arranged on the first branch pipe 21 between the second accumulator 72 and the double-acting oil cylinder 1 , and the auxiliary accumulators 73 pass through the electromagnetic switch valve 45 and the first branch pipe 21 . Connected. The beneficial effect of this arrangement is that multiple auxiliary accumulators 73 are set again. Due to the limited pressure that can be accumulated in conventional accumulators, it cannot meet the requirements of all pressure ranges. The pressure range, multiple auxiliary accumulators 73 can be opened to assist in maintaining the required pressure. This simple structure is convenient for implementation and improves the use effect of the overall structure.

进一步地，所述进油管路2上还连接有第一流量传感器51，所述第四支流32上于第二连通口位置连接有第二流量传感器52。这样设置的有益效果是：设置流量传感器可以实时监控对应位置的流量信息，便于使用者获取数据，了解油路中的油压情况，提高整体油路结构的使用效果。Further, a first flow sensor 51 is also connected to the oil inlet pipeline 2 , and a second flow sensor 52 is connected to the fourth branch 32 at the position of the second communication port. The beneficial effect of this setting is that the flow sensor can be set up to monitor the flow information of the corresponding position in real time, which is convenient for the user to obtain data, understand the oil pressure in the oil circuit, and improve the use effect of the overall oil circuit structure.

以上实例，只是本发明优选地具体实例的一种，本领域技术人员在本发明技术方案范围内进行的通常变化和替换都包含在本发明的保护范围内。The above examples are only one of the preferred specific examples of the present invention, and the usual changes and substitutions made by those skilled in the art within the scope of the technical solutions of the present invention are included in the protection scope of the present invention.

Claims (3)

1.一种用于实现双作用油缸精确控制的油路结构，包括双作用油缸、进油管路以及出油管路，其特征在于：还包括第一蓄能器、第二蓄能器，所述进油管路一端为进油口，另一端形成有第一支管和第二支管，所述第一支管与双作用油缸无杆腔连通，所述第一支管上设置有第一电磁阀，所述第一蓄能器通过第一两通流量控制阀与第一支管连通，所述第二蓄能器与第一支管连通并设置在第一电磁阀与无杆腔之间，所述第二支管与双作用油缸有杆腔连通，所述第二支管上设置有第二电磁阀，所述出油管路上设置有第二两通流量控制阀，所述出油管路一端与出油口连接，另一端形成有第三支流和第四支流，所述第三支流上设置有第三电磁阀，所述第三支流与第二支管连通形成第一连通口，所述第一连通口设置在第二电磁阀与双作用油缸有杆腔之间，所述第四支流与第一支管连通形成第二连通口，所述第四支流于第二连通口和第二两通流量控制阀之间设置有第四电磁阀。1. An oil circuit structure for realizing precise control of a double-acting oil cylinder, comprising a double-acting oil cylinder, an oil inlet pipeline and an oil outlet pipeline, and is characterized in that: also includes a first accumulator, a second accumulator, the One end of the oil inlet pipeline is an oil inlet, the other end is formed with a first branch pipe and a second branch pipe, the first branch pipe is communicated with the rodless cavity of the double-acting oil cylinder, a first solenoid valve is arranged on the first branch pipe, and the The first accumulator communicates with the first branch pipe through the first two-way flow control valve, the second accumulator communicates with the first branch pipe and is arranged between the first solenoid valve and the rodless cavity, and the second branch pipe It is communicated with the rod cavity of the double-acting oil cylinder, the second branch pipe is provided with a second solenoid valve, the oil outlet pipeline is provided with a second two-way flow control valve, one end of the oil outlet pipeline is connected with the oil outlet, and the other A third branch and a fourth branch are formed at one end, a third solenoid valve is arranged on the third branch, the third branch communicates with the second branch to form a first communication port, and the first communication port is arranged on the second branch. Between the solenoid valve and the rod cavity of the double-acting oil cylinder, the fourth branch is communicated with the first branch pipe to form a second communication port, and the fourth branch is provided between the second communication port and the second two-way flow control valve. Fourth solenoid valve. 2.根据权利要求1所述的用于实现双作用油缸精确控制的油路结构，其特征在于：所述第一支管上于第二蓄能器与双作用油缸之间设置有若干辅助蓄能器，所述辅助蓄能器通过电磁开关阀与第一支管连通。2 . The oil circuit structure for realizing precise control of a double-acting oil cylinder according to claim 1 , wherein the first branch pipe is provided with several auxiliary energy storages between the second accumulator and the double-acting oil cylinder. 3 . The auxiliary accumulator communicates with the first branch pipe through an electromagnetic switch valve. 3.根据权利要求1或2所述的用于实现双作用油缸精确控制的油路结构，其特征在于：所述进油管路上还连接有第一流量传感器，所述第四支流上于第二连通口位置连接有第二流量传感器。3. The oil circuit structure for realizing precise control of a double-acting oil cylinder according to claim 1 or 2, wherein a first flow sensor is also connected to the oil inlet pipeline, and the fourth branch is connected to the second A second flow sensor is connected at the position of the communication port.
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