Multi-stage oil cylinder synchronous control system

Abstract

The utility model provides a multistage oil cylinder synchronous control system which comprises an oil tank, an oil inlet pipeline and an oil return pipeline are arranged on the oil tank, the oil inlet pipeline is respectively communicated with a rod cavity pipeline and a rodless cavity pipeline through a first electromagnetic directional valve, and the rod cavity pipeline and the rodless cavity pipeline are respectively communicated with a rod cavity and a rodless cavity of a hydraulic cylinder through control valves. The rodless cavity pipeline is communicated with the oil return pipeline through a first overflow valve; the multi-stage oil cylinder synchronous control system can achieve highly accurate synchronization, and it is ensured that the multiple oil cylinders keep accurate positions and speeds when executing the same action; the multi-stage oil cylinder synchronous control system can improve the working efficiency, especially in the scene where complex tasks need to be completed through cooperative actions; the accurate synchronization of the system can reduce the operation time and improve the production efficiency. The synchronous control of the system is helpful for preventing unbalanced movement of the equipment, and the risk of accidents is reduced; and a safety function can be added into the system, so that timely shutdown under an abnormal condition is ensured.

Description

Technical Field

[0001] The utility model relates to the field of hydraulic oil cylinder control, in particular to a multi-stage oil cylinder synchronous control system. Background Art

[0002] The synchronous control system needs to ensure that multiple cylinders can maintain a high degree of precise synchronization when performing the same action. Any slight error may cause the equipment to be unstable or move abnormally. In actual work, the cylinders may be subjected to different dynamic loads, such as weight differences in different working positions. This may cause the synchronous control system to need to adjust according to real-time conditions to ensure the load balance of each cylinder. There is a risk of oil leakage in the hydraulic system, which may affect the synchronization between the cylinders. Regular inspection and maintenance are important measures to ensure the stability of the system. The viscosity of hydraulic oil may change at different temperatures, which may affect the flow rate of oil in the system. The system needs to consider the potential impact of temperature changes on synchronization performance. The existing synchronous control of multiple cylinders is difficult, and there are many influencing factors, making it difficult to achieve synchronous expansion and contraction. Utility Model Content

[0003] The main purpose of the utility model is to provide a multi-stage oil cylinder synchronization control system to solve the problems in the above-mentioned background technology.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: comprising an oil tank, the oil tank is provided with an oil inlet pipeline and an oil return pipeline, the oil inlet pipeline is respectively connected with the rod chamber pipeline and the rodless chamber pipeline through a first electromagnetic reversing valve, the rod chamber pipeline and the rodless chamber pipeline are respectively connected with the rod chamber and the rodless chamber of the hydraulic cylinder through a control valve, and the rodless chamber pipeline is connected with the oil return pipeline through a first overflow valve;

[0005] The A port of the first electromagnetic reversing valve is divided into multiple rod cavity pipelines, and the rod cavity pipelines are provided with a speed regulating valve and a balancing valve in sequence. The B port of the first electromagnetic reversing valve is connected to the rodless cavity pipeline through a one-way sequence valve;

[0006] There are deviation correction pipelines on the rod cavity pipelines, and the deviation correction pipelines on each rod cavity pipeline are connected to the oil tank through a double one-way throttle valve and a second electromagnetic reversing valve;

[0007] An oil replenishing pipeline is also provided. The rodless cavity pipeline is connected to the oil tank through a first one-way valve, and the rod cavity pipeline is connected to the rodless cavity pipeline through a multi-stage overflow valve.

[0008] Preferably, the oil inlet pipeline is provided with two pipelines, one for backup and the other for use, and each pipeline is provided with a butterfly valve, a shock absorber throat, an oil pump and a second one-way valve.

[0009] Preferably, a shock-resistant pressure gauge and a pressure sensor are provided on the oil inlet pipeline, a connecting pipeline is provided between the oil inlet pipeline and the oil return pipeline, and an electromagnetic overflow valve is provided on the pipeline.

[0010] Preferably, the fuel tank is provided with an air filter, a liquid level and temperature gauge, a liquid temperature sensor and a liquid level sensor.

[0011] Preferably, the rod cavity pipeline and the rodless cavity pipeline are provided with a seismic-resistant pressure gauge and a control valve.

[0012] Preferably, the rod chamber pipeline and the rodless chamber pipeline are connected at the hydraulic cylinder, and a second overflow valve is provided on the connected pipelines.

[0013] Preferably, a ball valve is provided at port A of the first electromagnetic reversing valve, and the first electromagnetic reversing valve is connected to the rod cavity pipeline through the ball valve.

[0014] The utility model provides a multi-stage oil cylinder synchronous control system, which has the following beneficial effects:

[0015] 1. The multi-stage cylinder synchronization control system can achieve highly accurate synchronization, ensuring that multiple cylinders maintain accurate position and speed when performing the same action; this is very important for applications that require high-precision positioning and coordinated action, such as precision manufacturing and assembly lines;

[0016] 2. The multi-stage cylinder synchronization control system can improve work efficiency, especially in scenarios where coordinated actions are required to complete complex tasks; the precise synchronization of the system can reduce operation time and improve production efficiency;

[0017] 3. Synchronous control of the system helps prevent unbalanced movement of the equipment and reduces the risk of accidents; safety functions can be added to the system to ensure timely shutdown in abnormal situations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0019] Figure 1 It is the overall connection flow chart of the utility model;

[0020] Figure 2 The utility model has a rod cavity oil inlet and oil return route diagram;

[0021] Figure 3 It is the oil inlet and oil replenishment route diagram of the rodless cavity of the utility model;

[0022] In the figure: oil tank 1; air filter 2; return oil filter 3; liquid level and temperature gauge 4; liquid temperature sensor 5; liquid level sensor 6; butterfly valve 7; shock absorber throat 8; oil pump 9; first relief valve 10; seismic pressure gauge 11; pressure sensor 12; multi-stage relief valve 13; first electromagnetic reversing valve 14; one-way sequence valve 15; speed control valve 16; ball valve 17; second electromagnetic reversing valve 18; double one-way throttle valve 19; second relief valve 20; balance valve 21; electromagnetic relief valve 22; one-way valve 23; return oil pipeline 24; oil replenishment pipeline 25; oil inlet pipeline 26; rod cavity pipeline 27; rodless cavity pipeline 28; deviation correction pipeline 29. DETAILED DESCRIPTION

[0023] like Figures 1 to 3 As shown, a multi-stage oil cylinder synchronous control system comprises an oil tank 1, on which an oil inlet pipeline 26 and an oil return pipeline 24 are arranged, the oil inlet pipeline 26 is communicated with a rod chamber pipeline 27 and a rodless chamber pipeline 28 respectively through a first electromagnetic reversing valve 14, the rod chamber pipeline 27 and the rodless chamber pipeline 28 are communicated with a rod chamber and a rodless chamber of a hydraulic cylinder respectively through a control valve, and the rodless chamber pipeline 28 is communicated with the oil return pipeline 24 through a first overflow valve 10;

[0024] The first electromagnetic reversing valve 14A port is divided into multiple rod chamber pipelines 27, and the rod chamber pipeline 27 is provided with a speed regulating valve 16 and a balance valve 21 in sequence. The first electromagnetic reversing valve 14B port is connected to the rodless chamber pipeline 28 through a one-way sequence valve 15;

[0025] There is a deviation correction pipeline 29 on the rod cavity pipeline 27, and the deviation correction pipeline 29 on each rod cavity pipeline 27 is connected to the oil tank 1 through a double one-way throttle valve 19 and a second electromagnetic reversing valve 18;

[0026] An oil replenishment pipeline 25 is also provided. The rodless cavity pipeline 28 is connected to the oil tank 1 through the first one-way valve 23 , and the rod cavity pipeline 27 is connected to the rodless cavity pipeline 28 through the multi-stage relief valve 13 . With this structure, the oil inlet pipeline 26 is connected to the rod chamber pipeline 27 and the rodless chamber pipeline 28 through the control switching of the first electromagnetic reversing valve 14, thereby driving the multi-stage cylinder to move and drive the gate to open and close; when the gate is opened, the flow of the hydraulic oil is controlled by the speed regulating valve 16 and the balance valve 21 on the rod chamber pipeline 27, so that the multi-stage cylinders on the left and right sides can operate synchronously; when the gate is closed, the hydraulic oil in the rod chamber passes through the balance valve 21, the speed regulating valve 16 and the multi-stage overflow valve 13 to the rodless chamber pipeline 28, and at the same time, the rodless chamber is replenished with oil through the oil replenishing pipeline 25; during the opening and closing process of the gate, the hydraulic oil on the rod chamber pipeline 27 is opened and closed through the double one-way throttle valve 19 and the second electromagnetic reversing valve 18 on the correction pipeline 29, and is synchronously controlled according to the synchronization state of the two cylinders fed back by the opening meter.

[0027] Preferably, two pipelines, one for backup and one for use, are provided on the oil inlet pipeline 26, and each pipeline is provided with a butterfly valve 7, a shock absorber throat 8, an oil pump 9 and a second non-return valve 30. With this structure, two sets of oil pump motors, one for backup and one for use, are automatically switched to backup when the motors fail, and the on-off is controlled by the butterfly valve 7, and the oil pump 9 is driven by the motor to deliver the hydraulic oil in the oil tank 1 to the oil inlet pipeline 26.

[0028] Preferably, a shockproof pressure gauge 11 and a pressure sensor 12 are provided on the oil inlet pipeline 26, and a connecting pipeline is provided between the oil inlet pipeline 26 and the oil return pipeline 24, and an electromagnetic overflow valve 22 is provided on the pipeline. With this structure, the shockproof pressure gauge 11 and the pressure sensor 12 are used to monitor the pressure on the oil inlet pipeline 26 in real time, and the electromagnetic overflow valve 22 is used to release pressure to the oil tank 1 when the pressure is too high.

[0029] Preferably, the oil tank 1 is provided with an air filter 2, a liquid level and temperature gauge 4, a liquid temperature sensor 5 and a liquid level sensor 6. With this structure, the liquid level and temperature gauge 4, the liquid temperature sensor 5 and the liquid level sensor 6 are used to monitor the oil temperature and liquid level of the hydraulic oil in the oil tank 1 in real time, and the air filter 2 is used to filter the exhaust gas of the oil tank 1 to the outside.

[0030] Preferably, a shockproof pressure gauge 11 and a control valve are provided on the rod cavity pipeline 27 and the rodless cavity pipeline 28. According to this structure, the shockproof pressure gauge 11 is used to detect the pressure in the pipeline in real time, and the control valve is used to control the on-off of the pipeline.

[0031] Preferably, the rod chamber pipeline 27 and the rodless chamber pipeline 28 are connected at the hydraulic cylinder, and a second overflow valve 20 is provided on the connected pipelines. According to this structure, the pipeline of the second overflow valve 20 is used for pressure relief.

[0032] Preferably, the first electromagnetic reversing valve 14A port is provided with a ball valve 17, and the first electromagnetic reversing valve 14 is connected to the rod chamber pipeline 27 through the ball valve 17. With this structure, the first electromagnetic reversing valve 14 switches the A port to connect the oil inlet pipeline 26 with the rod chamber pipeline 27, and the ball valve 17 is opened, so that hydraulic oil is introduced into the rod chamber of the multi-stage hydraulic cylinder, and the gate is driven to open; when the first electromagnetic reversing valve 14 switches the B port, the gate is driven to close, and the ball valve 17 is closed, so that the hydraulic oil in the rod chamber returns to the rodless chamber through the multi-stage relief valve 13 for oil replenishment.

[0033] Working principle:

[0034] Gate open: Figure 2 As shown, the oil pump motor group is started without load, with a delay of about 10 seconds. The first electromagnetic reversing valve 14 of the main system is energized and connected to port A. The pressure oil passes through the first electromagnetic reversing valve 14 and is divided into two paths. The pressure oil passes through the speed regulating valve 16 and the balance valve 21 and enters the rod chambers of the left and right multi-stage cylinders respectively. The multi-stage cylinders act according to the number of stages. The first-stage large cylinder acts first, and the second-stage small cylinder acts later. The two cylinders operate synchronously and the gate opens.

[0035] Gate closed: Figure 3 As shown, the ball valve 17 is manually closed, and the oil pump motor group is started without load. After a delay of about 10 seconds, the first electromagnetic reversing valve 14 of the main system is energized and connected to port B. The pressure oil passes through the one-way sequence valve 15 and enters the rodless chambers of the left and right multi-stage oil cylinders respectively. At the same time, the balance valve 21 on the rod chamber pipeline 27 is opened. The gate multi-stage oil cylinder falls due to its own weight. The rod chamber oil of the multi-stage oil cylinder passes through the speed regulating valve 16 and then passes through the back pressure adjustment multi-stage relief valve 13 to enter the rodless chamber pipeline 28 to form a differential. In addition, in order to ensure that the rodless chamber oil is sufficient to meet the operation when falling, an additional oil replenishment pipeline 25 is set. When the gate falls, the negative pressure will cause the oil to pass through the one-way valve 23 into the rodless chamber pipeline 28 and pass into the rodless chamber for oil replenishment. When the gate falls due to its own weight, a negative pressure will be formed in the rodless chamber. In addition, the overflow valve is set with pressure, so the rod chamber oil will be passed into the rodless chamber for oil replenishment.

[0036] Gate synchronization control: During the gate opening and closing process, by controlling the opening and closing of the double one-way throttle valve 19 and the second electromagnetic reversing valve 18, synchronous control is performed based on the feedback of the two cylinder synchronization status by the opening meter. When the stroke deviation of the two multi-stage cylinders is ≥20mm, the hydraulic system automatically shuts down and sends out an audible and visual alarm signal.

[0037] Motor failure switching: During operation, if the motor in use fails, the other oil pump motor group will be automatically started. If it cannot be started, an audible and visual alarm signal will be issued and the machine will be shut down.

[0038] Hydraulic system pressure protection: SP analog quantity, written into PLC, when the pressure reaches 23Mpa, the system pressure is too high, sound and light alarm, shutdown and maintenance; when the pressure is lower than 2Mpa, the system pressure is too low, sound and light alarm, shutdown and maintenance. When the pressure relay issues a high-pressure alarm, the rod chamber pressure is too high, shutdown and maintenance; when the pressure relay issues a low-pressure signal, there is an abnormality in the pipeline, shutdown and maintenance.

[0039] Electrical control of oil part: When the liquid level sensor 6 sends a signal, the liquid level is too high, and the sound and light alarm stops. When the liquid level sensor 6 sends a signal, the liquid level is too low, and the sound and light alarm stops. When the liquid temperature sensor 5 sends a signal, the oil temperature is too high, and the sound and light alarm. When the liquid temperature sensor 5 sends a signal, the oil temperature is too low, and the sound and light alarm. When the return oil filter 3 sends a signal, the return oil filter is blocked, and the sound and light alarm.

[0040] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A multi-stage oil cylinder synchronous control system, characterized by: The oil tank (1) comprises an oil inlet pipeline (26) and an oil return pipeline (24), the oil inlet pipeline (26) being connected to a rod chamber pipeline (27) and a rodless chamber pipeline (28) respectively through a first electromagnetic reversing valve (14), the rod chamber pipeline (27) and the rodless chamber pipeline (28) being connected to a rod chamber and a rodless chamber of a hydraulic cylinder respectively through a control valve, and the rodless chamber pipeline (28) being connected to the oil return pipeline (24) through a first overflow valve (10); The A port of the first electromagnetic reversing valve (14) is divided into a plurality of rod cavity pipelines (27), the rod cavity pipelines (27) are provided with a speed regulating valve (16) and a balancing valve (21) in sequence, and the B port of the first electromagnetic reversing valve (14) is connected to the rodless cavity pipeline (28) through a one-way sequence valve (15); The rod cavity pipeline (27) is branched with a deviation correction pipeline (29), and the deviation correction pipeline (29) on each rod cavity pipeline (27) is connected to the oil tank (1) through a double one-way throttle valve (19) and a second electromagnetic reversing valve (18); An oil replenishment pipeline (25) is also provided. The rodless cavity pipeline (28) is connected to the oil tank (1) via a first one-way valve (23), and the rod cavity pipeline (27) is connected to the rodless cavity pipeline (28) via a multi-stage overflow valve (13).

2. According to claim 1, a multi-stage oil cylinder synchronization control system is characterized in that: The oil inlet pipeline (26) is provided with two pipelines, one for backup and the other for use, and each pipeline is provided with a butterfly valve (7), a shock-absorbing throat (8), an oil pump (9) and a second non-return valve (30).

3. According to claim 1, a multi-stage oil cylinder synchronization control system is characterized in that: The oil inlet pipeline (26) is provided with a shock-resistant pressure gauge (11) and a pressure sensor (12); the oil inlet pipeline (26) and the oil return pipeline (24) are provided with a connecting pipeline, and an electromagnetic overflow valve (22) is provided on the pipeline.

4. According to claim 1, a multi-stage oil cylinder synchronization control system is characterized in that: The oil tank (1) is provided with an air filter (2), a liquid level and liquid temperature gauge (4), a liquid temperature sensor (5) and a liquid level sensor (6).

5. According to claim 1, a multi-stage oil cylinder synchronization control system is characterized in that: A shock-resistant pressure gauge (11) and a control valve are provided on the rod cavity pipeline (27) and the rodless cavity pipeline (28).

6. The multi-stage oil cylinder synchronization control system according to claim 1 is characterized in that: The rod chamber pipeline (27) and the rodless chamber pipeline (28) are connected at the hydraulic cylinder, and a second overflow valve (20) is provided on the connected pipelines.

7. The multi-stage oil cylinder synchronization control system according to claim 1 is characterized in that: A ball valve (17) is provided at port A of the first electromagnetic reversing valve (14), and the first electromagnetic reversing valve (14) is connected to the rod cavity pipeline (27) via the ball valve (17).

Images