CN211550117U - Low-pressure control oil circuit system - Google Patents
Low-pressure control oil circuit system Download PDFInfo
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- CN211550117U CN211550117U CN201922427637.XU CN201922427637U CN211550117U CN 211550117 U CN211550117 U CN 211550117U CN 201922427637 U CN201922427637 U CN 201922427637U CN 211550117 U CN211550117 U CN 211550117U
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Abstract
The utility model discloses a low-pressure control oil circuit system, which comprises a hydraulic loop system unit; the hydraulic loop system unit comprises a main loop which is arranged between a main oil tank and an oil return tank and is connected through a pipeline; the main loop comprises a motor pump, a pressure flow control device and a pressurizing cylinder which are sequentially arranged along a pipeline; a low-pressure control loop for small-flow pressure regulation is arranged at the downstream of the main loop; the utility model discloses the low pressure control return circuit of joining can compensate the main loop is in the pressurization in-process precision relatively lower not enough, pressure and flow in can the accurate control main loop, and the utility model relates to a rationally, long service life.
Description
Technical Field
The utility model belongs to the technical field of the hydraulic control technique and specifically relates to a pressure control system development that is used for rubber vulcanization machine, and specifically speaking is the vulcanizer to stabilize the accuracy.
Background
In the existing vulcanizing machine pressurization mode, although the speed and the flow can be controlled by adjusting a pressurization valve, and a little overpressure can be controlled in a high-pressure stage, the overpressure is obvious in a low-pressure stage (less than 30kg/cm2), the pressurization speed and the flow cannot be stably controlled or the pressurization cannot be accurately carried out to a specified target, so that the purpose of pressurizing to a specified pressure value within a specified time cannot be achieved in the whole pressurization process. With the development of the rubber industry, the processing technologies of various products are continuously updated, and in order to ensure that the products have higher quality standards to meet the use requirements under different working conditions, the original pressurization mode cannot meet the requirements of part of customers, so that a low-pressure control oil way system needs to be developed to accurately and stably control the pressurization speed and flow rate so as to meet the requirements of the production technologies of various products.
SUMMERY OF THE UTILITY MODEL
In order to overcome the deficiencies in the prior art, the utility model provides a low pressure control oil piping system, this system are equipped with low pressure control return circuit, play accurate control pressurization speed and flow.
In order to achieve the above purpose, the utility model adopts the following technical scheme to realize:
a low-pressure control oil circuit system comprises a hydraulic circuit system unit; the hydraulic loop system unit comprises a main loop which is arranged between a main oil tank and an oil return tank and is connected through a pipeline; the main loop comprises a motor pump, a pressure flow control device and a pressurizing cylinder which are sequentially arranged along a pipeline; and a low-pressure control loop for regulating the pressure at a small flow is arranged at the downstream of the main loop.
The pressure and flow control device is used for adjusting the flow and the pressure of the main loop, and meanwhile, the low-pressure control loop accurately adjusts and controls the pressure of the main loop through small-flow pressure adjustment so that the actual pressure of the main loop is stabilized at the set working pressure; preferably, the pressure flow control device is realized by arranging a valve body.
The low-pressure control oil way system comprises a control system unit and a detection system unit; the control system unit is respectively connected with the hydraulic circuit system unit and the detection system unit; the control system unit is used for controlling a valve body in the hydraulic circuit system unit;
the detection system unit is used for detecting the pressure in the hydraulic circuit system unit and feeding back a detection signal to the control system unit, and a detection device in the detection system unit is positioned at the downstream of the main circuit and in front of the low-pressure control circuit.
A motor pump in the main loop pressurizes the pressurizing cylinder; setting working pressure by a client, namely, inputting a command signal; the detection system unit detects a pressure signal in the loop and feeds the signal back to the control system unit, the system control unit performs internal operation on an input command signal and a feedback signal of the detection system unit, and finally outputs a proportional electric signal to control a pressure flow control device in the main loop and control the pressure and the flow in the main loop; meanwhile, the control system unit controls the low-pressure control loop to regulate the pressure at a small flow rate according to the comparison between the actual pressure detected by the detection device and an input instruction signal, so that the actual oil pressure is stabilized at the pressure set by a client; the low-voltage control loop has higher regulation precision than that of the main loop;
the main loop can realize a traditional pressurization mode, has the characteristics of large pressurization flow and high pressurization speed, but has relatively low precision in the pressurization process; the low-voltage control loop can make up for the defects of the main loop and plays a role in accurate control.
Further, the pressure flow control device of the primary circuit includes a proportional pressure flow combination valve for controlling the pressure and flow in the primary circuit.
Furthermore, the low-pressure control loop comprises a low-pressure regulating valve, and the low-pressure regulating valve carries out small-flow pressure regulation according to the difference value between the working set pressure and the actual pressure of the oil way, so that accurate control of loop pressure is achieved
Further, the hydraulic circuit system unit comprises an overpressure control circuit, the overpressure control circuit is led out from the downstream position of the main circuit, the detection device is arranged in front of the overpressure control circuit, the overpressure control circuit comprises an overpressure relief valve, and the overpressure relief valve is used for relieving large pressure to enable the pressure of the main circuit to be close to the working set pressure.
If the detection device detects that the actual pressure exceeds the set pressure, the overpressure control loop works, the overpressure relief valve relieves the large amount of pressure to enable the pressure to be close to the set working pressure, the overpressure control loop stops working, and the low-pressure control loop conducts small-flow pressure regulation, so that the pressure is stabilized on the set pressure of a customer.
Further, the low-pressure control circuit comprises an opening and closing valve, and the opening and closing valve is arranged in front of the low-pressure control circuit and used for opening or closing the low-pressure control circuit.
If the actual pressure detected by the detection device exceeds the set pressure, the opening and closing valve is in a closed state, and the low-pressure control loop is isolated; when the overpressure control loop releases a large amount of pressure to enable the pressure to be close to the working limited pressure, the opening and closing valve is in an opening state, and the low-pressure control loop is connected; the on-off valve can effectively protect a valve body in a low-pressure control loop.
Further, the low-pressure control oil way system comprises a ball valve and is used for unloading the whole pressure of the main circuit during maintenance.
Normally, the ball valve is in a closed state, and when the system is overhauled, the ball valve is opened to completely drain the system pressure.
Specifically, the ball valve 3032 is arranged in parallel with the overpressure relief valve 3031.
Further, the control system unit includes a programmable controller and a proportional board.
The programmable controller is used for receiving signals and internal logic operation and outputting appropriate control signals; the proportional board receives and amplifies the proportional control signal and outputs an executable electric signal.
Further, the low-pressure control oil circuit system comprises a touch screen connected with the control system unit and used for setting working pressure.
The touch screen is used for man-machine interaction, and a user can manually set a working pressure instruction signal on the touch screen and transmit the signal to the control system unit.
Further, the detection device of the detection system unit comprises a pressure sensor, and the pressure sensor extends into a pipeline of the hydraulic circuit system unit to detect a real-time pressure signal.
The detection system unit further comprises a pressure gauge for displaying the pressure of the hydraulic circuit system unit.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) the utility model discloses add the low pressure control return circuit, can compensate the main loop plays accurate control's effect at the relatively lower not enough of pressurization in-process precision.
(2) The utility model relates to a rationally, can effectively protect the valve body in the oil circuit, increase life.
(3) The utility model is used for vulcanizer pressurization, the control pressurization speed flow that the superpressure still can be stable at low pressure stage (being less than 30kg/cm2) to can pressurize to appointed pressure value accurately.
Drawings
FIG. 1 is a schematic structural view of the low-pressure control oil circuit system of the present invention;
FIG. 2 is a schematic diagram of the structure of the hydraulic circuit system unit of the present invention;
reference numerals: 1 a control system unit; 101 a programmable controller; 102 a proportional plate; 2 detecting a system unit; 201 a detection device; 202 pressure gauge; 3 hydraulic circuit system units; 301 a main loop; 3011 motor pumping; 3012 pressurizing the cylinder; 3013 a proportional pressure-flow combination valve; 302 low-voltage control loop; 3021 low pressure regulator valve; 3022 opening and closing the valve; 303 an overpressure control loop; 3031 overpressure relief valves; 3032 ball valves; 4, a touch screen; and 5, an oil tank.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
In the design, the downstream of the main circuit can be understood that the downstream of the pressure flow control device in the main circuit is positioned in the process of supplying oil to the pressurizing cylinder from the main circuit through the motor pump.
As shown in fig. 1-2, a low-pressure control oil passage system includes a hydraulic circuit system unit 3; the hydraulic circuit system unit 3 comprises a main circuit 301 which is arranged between a main oil tank and an oil return tank and is connected through a pipeline; the main loop 301 comprises a motor pump 3011, a pressure flow control device and a pressurizing cylinder 3012 which are arranged along a pipeline in sequence; a low-pressure control loop 302 for small-flow pressure regulation is arranged at the downstream of the main loop 301.
The pressure and flow control device is used for adjusting the flow and the pressure of the main loop 301, and meanwhile, the low-pressure control loop 302 accurately regulates and controls the pressure of the main loop 302 through small-flow pressure adjustment, so that the actual pressure of the main loop 301 is stabilized at the set working pressure.
The low-pressure control oil way system also comprises a control system unit 1 and a detection system unit 2; the control system unit is respectively connected with the hydraulic circuit system unit 3 and the detection system unit 2; the control system unit 1 is used for controlling a valve body in the hydraulic circuit system unit 3;
the detection system unit 2 is used for detecting the pressure in the hydraulic circuit system unit 3 and feeding back a detection signal to the control system unit 1, and the detection device 201 in the detection system unit 2 is positioned at the downstream of the main circuit 301 and in front of the low-pressure control circuit 302.
The motor pump 3011 in the main circuit 301 pressurizes the pressurizing cylinder 3012; setting working pressure by a client, namely, inputting a command signal; the detection system unit 2 detects a pressure signal in the main loop and feeds the signal back to the control system unit 1, the system control unit 1 performs internal operation on an input command signal and a feedback signal of the detection system unit, and finally outputs a proportional electric signal to control a flow pressure control device in the main loop 301 so as to control the pressure and the flow in the main loop 301, and meanwhile, the control system unit 1 controls the low-pressure control loop 302 to perform small-flow pressure regulation according to comparison between actual pressure detected by the detection device 201 and the input command signal so that the actual pressure is stabilized at a pressure set by a client; the regulation precision of the low-voltage control loop 302 is higher than that of the main loop 301.
The main loop 301 can realize a traditional pressurization mode, has the characteristics of large pressurization flow and high pressurization speed, but has relatively low precision in the pressurization process; the low-voltage control loop 302 can make up for the deficiency of the main loop 301, and plays a role in precise control.
Preferably, the pressure flow control means of the primary circuit 301 comprises a proportional pressure-flow combination valve 3013, and the proportional pressure-flow combination valve 3013 is used to control the pressure and flow in the circuit.
Preferably, the low pressure control circuit 302 includes a low pressure regulator valve 3021, and the low pressure regulator valve 3021 performs small flow rate regulation based on the operation set pressure and the oil line actual pressure to achieve accurate control of the circuit pressure.
Preferably, the hydraulic circuit system unit comprises an overpressure control circuit 303, the overpressure control circuit 303 leads out from the downstream of the main circuit 301, the detecting device 201 is arranged in front of the overpressure control circuit 303, the overpressure control circuit 303 comprises an overpressure relief valve 3031, and the overpressure relief valve 3031 is used for relieving excess pressure to enable the main circuit pressure to approach the working set pressure.
If the actual pressure detected by the detection device 201 exceeds the set pressure too much, the overpressure control loop 303 operates, the overpressure relief valve 3031 relieves the excessive pressure to make the pressure approach the working set pressure, the overpressure control loop 303 stops operating, and the low-pressure control loop 302 performs small-flow pressure regulation to make the pressure stable at the pressure set by the customer.
Preferably, the low pressure control circuit 302 includes an opening/closing valve 3022, and the opening/closing valve 3022 is disposed in front of the low pressure control circuit 302 to open or close the low pressure control circuit 302.
If the actual pressure detected by the detection device 201 exceeds the set pressure too much, the open/close valve 3022 is in a closed state, and the low-pressure control circuit 302 is isolated; when the overpressure control loop 303 releases the excess pressure so that the pressure approaches the working limit pressure, the on-off valve 3022 opens, and the low pressure control loop 302 is switched in; the on-off valve 3022 can effectively protect the valve body in the low-pressure control loop 302.
The on-off valve 3022 is a one-way valve.
Preferably, the low-pressure control oil circuit system comprises a ball valve 3032, and is used for draining all system pressure during maintenance.
Normally, the ball valve 3032 is in a closed state, and when the system is overhauled, the ball valve 3032 is opened to completely drain the system pressure.
Specifically, the ball valve 3032 is arranged in parallel with the overpressure relief valve 3031.
Preferably, the control system unit 1 comprises a programmable controller 101 and a proportional board 102.
The programmable controller 101 is used for receiving signals and internal logic operation and outputting appropriate control signals; the proportional plate 102 receives and amplifies the proportional control signal, and outputs an executable electric signal to control the proportional pressure-flow combination valve.
Preferably, the low-pressure control oil circuit system includes a touch screen 4 connected to the control system unit 1, and configured to set the working pressure.
The touch screen 4 is used for man-machine interaction, and a user can manually set a working pressure instruction signal on the touch screen 4 and transmit the signal to the control system unit 1.
Preferably, the detection means 201 of the detection system unit 2 comprise a pressure sensor; the pressure sensor extends into a pipeline of the hydraulic circuit system unit 3 to detect real-time pressure signals.
The detection system unit 2 further comprises a pressure gauge 202 for displaying the pressure of the hydraulic circuit system unit 3.
As shown in fig. 2, in the hydraulic circuit system in one embodiment, the main circuit 301 includes a motor pump 3011, a proportional pressure-flow combination valve 3013 and a pressure cylinder 3012, which are sequentially arranged along a pipeline, the detection device 201 in the detection system unit 2 is arranged between the proportional pressure-flow combination valve 3013 and the pressure cylinder 3012, a low-pressure control circuit 302 and an overpressure control circuit 303 are led out between the detection device 201 and the pressure cylinder 3012, the low-pressure control circuit 302 includes an on-off valve 3022 and a low-pressure regulating valve 3021 which are sequentially arranged, the overpressure control circuit 303 includes an overpressure relief valve 3031, and a ball valve 3022 is arranged in parallel with the overpressure relief valve 3031.
The working principle of the embodiment is as follows: a client sends working pressure as an input instruction signal to the control system unit, the detection device 201 detects the pressure in the main loop 301 and feeds the signal back to the control system unit 1, the control system unit 1 performs internal operation according to the input instruction signal and a feedback signal of the detection system unit 2, and finally outputs a proportional electric signal to control a proportional pressure-flow composite valve 3013 in the main loop 301 so as to control the pressure and flow in the main loop 301; meanwhile, the control system unit 1 compares the actual main circuit pressure with an input command signal, and if the actual pressure detected by the detection device 201 does not exceed a set pressure much, the open/close valve 3022 connects the low pressure control circuit 302 to the main circuit 301, and the low pressure regulating valve 3021 performs small flow pressure regulation, that is, small flow pressure relief, so that the actual pressure of the main circuit 301 is stabilized at the set working pressure; if the actual pressure detected by the detection device 201 exceeds the set pressure, the open/close valve 3022 is in a closed state to isolate the low-pressure control circuit 302 from the main circuit 301, at this time, the overpressure control circuit 303 operates, the overpressure relief valve 3031 relieves the excessive pressure to enable the main circuit pressure to approach the set working pressure and to transfer the operation to the low-pressure control circuit 302, the open/close valve 3022 is opened to connect the low-pressure control circuit 302 to the main circuit 301, and the low-pressure regulating valve 3021 performs small-flow pressure regulation, that is, performs small-flow pressure relief, so that the actual pressure of the main circuit 301 is stabilized at the set working pressure.
The proportional pressure-flow combination valve 3013 in the main loop 301 regulates and controls the main loop according to a proportional control signal sent by the control system unit 1, and has the characteristics of large pressurizing flow and high pressurizing speed, but the precision of the main loop in the pressurizing process is relatively low; therefore, the low-pressure control loop 302 is added, which can make up for the deficiency of the main loop 301, and when the proportional pressure-flow combination valve 3013 is used for regulation, the low-pressure regulating valve 3021 is used for auxiliary regulation, that is, for small-flow pressure regulation, and the pressure regulating precision is higher than that of the proportional pressure-flow combination valve 3013, so as to play a role in accurately controlling the pressure of the main loop;
in order to ensure the working environment of the low-pressure regulating valve 3021 and avoid damage to the low-pressure regulating valve 3021 due to excess pressure, a valve 3022 is connected in series before the low-pressure regulating valve 3021, an excess pressure control circuit 303 is led out between the detection device 201 and the pressurizing cylinder 3012, the excess pressure in the main circuit is released by the excess pressure relief valve 3031, the pressure in the main circuit 301 is made to approach the working set pressure, the working is transferred to the low-pressure regulating valve 3021, and the valve 3022 and the excess pressure relief valve 3031 protect the low-pressure regulating valve 3021.
And a ball valve 3032 is arranged in parallel with the overpressure relief valve 3031, wherein the ball valve 3032 is normally in a closed state; when the system is overhauled, the ball valve 3032 is opened, the pressure of the system is completely released, and the system is convenient to overhaul.
The design adds a low-pressure control loop, can make up the defect that the precision of the main loop is relatively low in the pressurizing process, and plays a role in precise control; and this reasonable in design can effectively protect the valve body in the oil circuit, increases life.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A low pressure control oil piping system which characterized in that: comprises a hydraulic circuit system unit (3); the hydraulic circuit system unit (3) comprises a main circuit (301) which is arranged between a main oil tank and an oil return tank and is connected through a pipeline;
the main loop (301) comprises a motor pump (3011), a pressure flow control device and a pressurizing cylinder (3012) which are sequentially arranged along a pipeline;
and a low-pressure control loop (302) for regulating the pressure of small flow is arranged at the downstream of the main loop (301).
2. The low-pressure control oil passage system according to claim 1, characterized in that: the device also comprises a control system unit (1) and a detection system unit (2); the control system unit is respectively connected with the hydraulic circuit system unit (3) and the detection system unit (2);
the detection system unit (2) is used for detecting the pressure in the hydraulic circuit system unit (3) and feeding back a detection signal to the control system unit (1), and a detection device (201) in the detection system unit (2) is positioned at the downstream of the main circuit (301) and in front of the low-pressure control circuit (302).
3. The low-pressure control oil passage system according to claim 2, characterized in that: the pressure flow control means of the primary circuit (301) comprises a proportional pressure flow combination valve (3013), the proportional pressure flow combination valve (3013) being used to control the pressure and flow in the circuit.
4. The low-pressure control oil passage system according to claim 2, characterized in that: the low-pressure control circuit (302) comprises a low-pressure regulating valve (3021), and the low-pressure regulating valve (3021) performs small-flow pressure regulation according to working set pressure and oil path actual pressure.
5. The low-pressure control oil passage system according to claim 2, characterized in that: the hydraulic circuit system unit comprises an overpressure control circuit (303), the overpressure control circuit (303) is led out from the position downstream of the main circuit (301), the overpressure control circuit (303) comprises an overpressure relief valve (3031), and the overpressure relief valve (3031) is used for relieving excess pressure to enable the main circuit pressure to approach the working set pressure.
6. The low-pressure control oil passage system according to claim 2, characterized in that: the low-pressure control loop (302) comprises an opening and closing valve (3022), and the opening and closing valve (3022) is arranged in front of the low-pressure control loop (302) and used for opening or closing the low-pressure control loop (302).
7. The low-pressure control oil passage system according to claim 1, characterized in that: the low-pressure control oil way system comprises a ball valve (3032) which is used for unloading all pressure in the system during maintenance.
8. The low-pressure control oil passage system according to claim 2, characterized in that: the control system unit (1) comprises a programmable controller (101) and a proportional board (102).
9. The low-pressure control oil passage system according to claim 2, characterized in that: the low-pressure control oil way system comprises a touch screen (4) connected with the control system unit (1) and is used for setting working pressure.
10. The low-pressure control oil passage system according to claim 2, characterized in that: the detection device (201) of the detection system unit (2) comprises a pressure sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922427637.XU CN211550117U (en) | 2019-12-30 | 2019-12-30 | Low-pressure control oil circuit system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922427637.XU CN211550117U (en) | 2019-12-30 | 2019-12-30 | Low-pressure control oil circuit system |
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| CN211550117U true CN211550117U (en) | 2020-09-22 |
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| CN201922427637.XU Active CN211550117U (en) | 2019-12-30 | 2019-12-30 | Low-pressure control oil circuit system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118352753A (en) * | 2024-06-14 | 2024-07-16 | 宁德时代新能源科技股份有限公司 | Liquid injection system and liquid injection method |
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2019
- 2019-12-30 CN CN201922427637.XU patent/CN211550117U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118352753A (en) * | 2024-06-14 | 2024-07-16 | 宁德时代新能源科技股份有限公司 | Liquid injection system and liquid injection method |
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