A tension-stretching composite cylinder stretching buffer control system

Abstract

The present invention relates to the technical field of stretching machines, and in particular to a tension-stretching composite cylinder stretching buffer control system, comprising an oil supply module, the oil supply module comprising a power oil tank, a pump group, and a pump outlet control valve group connected in sequence; a composite cylinder stretching mechanism, the composite cylinder stretching mechanism having an X1 port, an X2 port, and an X3 port, the composite cylinder stretching mechanism also being provided with a broken belt control unit; a stretching buffer control valve group, the stretching buffer control valve group being used to connect the oil supply module and the composite cylinder stretching mechanism, the stretching buffer control valve group being connected to the broken belt control unit; the stretching buffer control valve group comprising a first proportional servo valve, a second proportional servo valve, a first electromagnetic ball valve, a second electromagnetic ball valve, and a third electromagnetic ball valve. The tension-stretching composite cylinder stretching buffer control system provided by the present invention is suitable for the aerospace field and can meet the requirements of the field for the stretching of thick plate aluminum alloys.

Description

Technical Field

[0001] The present invention relates to the technical field of stretching machines, in particular to a tension-stretching composite cylinder stretching buffer control system. Background Art

[0002] Tension stretching machines are typical high-end equipment suitable for the aerospace industry, meeting the production needs of thick aluminum alloy plates. For many years, these machines were primarily monopolized by a few foreign equipment manufacturers. In recent years, with the advancement of my country's industry and the development of high-end equipment, Chinese high-end equipment manufacturers have embarked on the research and development of tension stretching machines for thick plate stretching, and have achieved success. However, with technological advancements, the demand for large-section, high-quality medium-thick aluminum alloy plates is increasing, requiring increasingly larger equipment. To meet the demands of aluminum alloy plates of varying thicknesses, the tension stretching machine's stretching process needs to become increasingly complex. The tension buffer control technology for the tension stretching machine's composite cylinder is a technical difficulty in this field, requiring further breakthroughs. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the related art. To this end, the purpose of the present invention is to provide a tensioning and buffering control system for a composite cylinder of a tension stretching machine.

[0004] In order to achieve this purpose, the technical solution adopted by the present invention is:

[0005] A tension and stretching machine composite cylinder stretching buffer control system, comprising:

[0006] An oil supply module, the oil supply module comprising a power oil tank, a pump group and a pump outlet control valve group connected in sequence;

[0007] A compound cylinder stretching mechanism, the compound cylinder stretching mechanism having an X1 port, an X2 port, and an X3 port, and the compound cylinder stretching mechanism is also provided with a belt breaking control unit;

[0008] a stretching buffer control valve group, the stretching buffer control valve group being used to connect the oil supply module and the compound cylinder stretching mechanism, and the stretching buffer control valve group being connected to the belt breaking control unit;

[0009] The stretching buffer control valve group includes a first proportional servo valve, a second proportional servo valve, a first electromagnetic ball valve, a second electromagnetic ball valve and a third electromagnetic ball valve;

[0010] The first proportional servo valve includes a first A port, a first B port, a first P port, and a first T port, wherein the first P port is connected to the pump outlet control valve group, the first T port is connected to the power oil tank, the first A port is connected to the X2 port, the first B port is connected to the X3 port, the first electromagnetic ball valve is arranged between the first A port and the X2 port, and the second electromagnetic ball valve is arranged between the first B port and the X3 port;

[0011] The second proportional servo valve includes a second A port, a second B port, a second P port, and a second T port, the second P port is connected to the pump outlet control valve group, the second T port is connected to the power oil tank, the second A port is connected to the X1 port, and the third electromagnetic ball valve is arranged between the second A port and the X1 port;

[0012] When the belt break control unit detects that the composite cylinder stretching mechanism has broken belts, the belt break control unit adjusts the pressure of the stretching buffer control valve group by regulating the first proportional servo valve and the second proportional servo valve to buffer the pressure of the composite cylinder stretching mechanism.

[0013] A further improvement of the tension-stretching composite cylinder stretching buffer control system of the present invention is that it further includes a first buffer valve and a second buffer valve, the first buffer valve and the second buffer valve are connected in parallel, the first ends of the first buffer valve and the second buffer valve are connected to the line between the first port A and the X2 port, and the second ends of the first buffer valve and the second buffer valve are connected to the line between the first port B and the X3 port;

[0014] It also includes a two-way safety valve, a first end of which is connected to the line between the first A port and the X2 port, and a second end of which is connected to the line between the first B port and the X3 port.

[0015] A further improvement of the tension-stretching composite cylinder stretching buffer control system of the present invention is that it further includes an accumulator, which is connected to the connection between the first T-port and the power oil tank.

[0016] A further improvement of the tension-stretching composite cylinder stretching buffer control system of the present invention is that it also includes a two-way directional valve B and a second overflow valve, the first end of the second overflow valve is connected to the connection between the accumulator and the power oil tank and the second end is connected to the connection between the first electromagnetic ball valve and the X2 port, the first end of the two-way directional valve B is connected to the connection between the first electromagnetic ball valve and the X2 port and the second end is connected to the power oil tank.

[0017] A further improvement of the tension-stretching composite cylinder stretching buffer control system of the present invention is that it also includes a third overflow valve and a fourth overflow valve, the third overflow valve and the fourth overflow valve are connected in parallel, and a shut-off valve is provided at the connection between the accumulator and the power oil tank, and the two ends of the third overflow valve and the fourth overflow valve are connected to the connection between the accumulator and the power oil tank and are located on both sides of the shut-off valve.

[0018] A further improvement of the tension-stretching composite cylinder stretching buffer control system of the present invention is that it also includes a fourth electromagnetic ball valve and a throttle valve, the fourth electromagnetic ball valve and the throttle valve are connected in series, the first end of the throttle valve is connected to the connection between the first electromagnetic ball valve and the X2 port, and the second end of the fourth electromagnetic ball valve is connected to the connection between the second electromagnetic ball valve and the X3 port.

[0019] A further improvement of the tension-stretching composite cylinder stretching buffer control system of the present invention is that it also includes a second pressure sensor, a second pressure measuring joint, a third pressure sensor and a third pressure measuring joint, the second pressure measuring joint is connected to the connection node of the throttle valve, the first electromagnetic ball valve and the X2 port, the third pressure measuring joint is connected to the connection between the fourth electromagnetic ball valve and the accumulator, the second pressure sensor is connected to the second pressure measuring joint, and the third pressure sensor is connected to the third pressure measuring joint.

[0020] A further improvement of the tension-stretching composite cylinder stretching buffer control system of the present invention is that it also includes a first overflow valve, the first end of the first overflow valve is connected between the third electromagnetic ball valve and the X1 port, and the second end of the first overflow valve is connected to the connection between the second T port and the power oil tank.

[0021] A further improvement of the tension-stretching composite cylinder stretching buffer control system of the present invention is that it also includes a two-way directional valve A, a superimposed one-way valve, an electromagnetic reversing valve, a first pressure sensor and a first pressure measuring joint, wherein the two-way directional valve A has an internal channel, a first port and a second port.

[0022] The superimposed one-way valve and the electromagnetic reversing valve are connected in series, the top end of the electromagnetic reversing valve is connected to the internal channel, the bottom end of the superimposed one-way valve is connected to the second port, the first port is connected to the connection between the third electromagnetic ball valve and the X1 port, the second port is connected to the power oil tank, the first pressure measuring joint is connected to the connection between the third electromagnetic ball valve, the X1 port and the first port, and the first pressure sensor is connected to the first pressure measuring joint.

[0023] A further improvement of the tension-stretching composite cylinder stretching buffer control system of the present invention is that the broken belt control unit stores control logic;

[0024] When the belt-breaking control unit detects that the composite cylinder stretching mechanism has broken belts, it regulates the stretching buffer control valve group to perform a buffering operation;

[0025] The control logic is specifically as follows:

[0026] Monitor the stretching force of the composite cylinder stretching mechanism,

[0027] ,

[0028] in, For time, For in time The tensile force, is the elastic coefficient, For in time displacement when

[0029] Monitor the change in tensile force,

[0030] ,

[0031] in, For time and time The change in tensile force between For time tensile force;

[0032] Determine the change in tensile force Whether it exceeds the set threshold , when the tensile force changes Exceeding the set threshold When it is determined that a sudden change in tensile force occurs, the broken belt control unit starts a regulating operation;

[0033] The belt break control unit adjusts the valve opening of the first proportional servo valve or the second proportional servo valve to adjust the oil flow of the first proportional servo valve or the second proportional servo valve, thereby regulating the pressure of the compound cylinder stretching mechanism to a set safe state to avoid belt breakage.

[0034] The above one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects:

[0035] The tension stretching machine composite cylinder stretching buffer control system provided by the present invention is suitable for the aerospace field and can meet the stretching requirements of thick plate aluminum alloy in this field. By setting a belt break control unit, it can monitor in real time whether a belt break occurs. When a belt break is detected, the belt break control unit adjusts the flow rate of the system's hydraulic medium and the system's pressure by regulating the stretching buffer control valve group, thereby buffering the impact of the belt break on the system, thereby effectively avoiding damage to the equipment due to the impact.

[0036] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0038] Figure 1 It is a schematic diagram of the overall structure of a tension stretching machine composite cylinder stretching buffer control system provided by the present invention.

[0039] Figure 2 Is to set the threshold Schematic diagram of changes over time.

[0040] Figure 3 is the change in tensile force Schematic diagram of changes over time.

[0041] Reference numerals:

[0042] 1. Second proportional servo valve; 2. First solenoid ball valve; 3. Two-way directional valve A; 4. First relief valve; 5. First pressure sensor; 6. First pressure measuring joint; 7. Two-way directional valve B; 8. Second relief valve; 9. Fourth solenoid ball valve; 10. Throttle valve; 11. First buffer valve; 12. Two-way safety valve; 13. Gate valve; 14. Third relief valve; 15. Fourth relief valve; 16. Accumulator; 17. Superimposed check valve; 18. Solenoid reversing valve; 19. First proportional servo valve; 20. Second solenoid ball valve; 21. Third solenoid ball valve; 22. Second pressure sensor; 23. Second pressure measuring joint; 24. Third pressure sensor; 25. Third pressure measuring joint; 26. Second buffer valve; 27. Pump outlet control valve group; 28. Pump group; 29. ​​Power oil tank; 30. Compound cylinder stretching mechanism; 31. Stretching buffer control valve group. DETAILED DESCRIPTION

[0043] To make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0044] The present invention will be further described below with reference to the embodiments.

[0045] See also Figure 1 The present invention provides a tension and stretching machine composite cylinder stretching buffer control system, comprising:

[0046] The oil supply module includes a power oil tank 29, a pump group 28 and a pump outlet control valve group 27 connected in sequence;

[0047] The composite cylinder stretching mechanism 30 has an X1 port, an X2 port, and an X3 port. The composite cylinder stretching mechanism 30 is also provided with a belt breaking control unit;

[0048] The stretching buffer control valve group 31 is used to connect the oil supply module and the composite cylinder stretching mechanism 30, and the stretching buffer control valve group 31 is connected to the belt breaking control unit;

[0049] The stretching buffer control valve group 31 includes a first proportional servo valve 19, a second proportional servo valve 1, a first electromagnetic ball valve 2, a second electromagnetic ball valve 20 and a third electromagnetic ball valve 21;

[0050] The first proportional servo valve 19 includes a first port A, a first port B, a first port P, and a first port T. The first port P is connected to the pump outlet control valve group 27, the first port T is connected to the power oil tank 29, the first port A is connected to the X2 port, and the first port B is connected to the X3 port. The first electromagnetic ball valve 2 is provided between the first port A and the X2 port, and the second electromagnetic ball valve 20 is provided between the first port B and the X3 port.

[0051] The second proportional servo valve 1 includes a second A port, a second B port, a second P port, and a second T port. The second P port is connected to the pump outlet control valve group 27, the second T port is connected to the power oil tank 29, and the second A port is connected to the X1 port. The third electromagnetic ball valve 21 is arranged between the second A port and the X1 port.

[0052] When the belt break control unit detects that the composite cylinder stretching mechanism 30 is broken, the belt break control unit adjusts the pressure of the stretching buffer control valve group 31 by regulating the first proportional servo valve 19 and the second proportional servo valve 1 to buffer the pressure of the composite cylinder stretching mechanism 30.

[0053] In a preferred embodiment of the tension-stretching composite cylinder stretching buffer control system of the present invention, the first buffer valve 11 and the second buffer valve 26 are further included. The first buffer valve 11 and the second buffer valve 26 are connected in parallel. The first ends of the first buffer valve 11 and the second buffer valve 26 are connected to the line between the first port A and the X2 port. The second ends of the first buffer valve 11 and the second buffer valve 26 are connected to the line between the first port B and the X3 port, thereby connecting the X2 port and the X3 port, and facilitating the flow of oil between the X2 port and the X3 port.

[0054] It also includes a two-way safety valve 12, the first end of which is connected to the line between the first A port and the X2 port, and the second end is connected to the line between the first B port and the X3 port. The two-way safety valve 12 is used to achieve auxiliary flow of oil between the X2 port and the X3 port.

[0055] Furthermore, an accumulator 16 is included. The accumulator 16 is connected to the connection between the first T port and the power oil tank 29. The accumulator 16 temporarily accumulates oil, thereby buffering the pressure of the system.

[0056] Furthermore, it also includes a two-way directional valve B and a second overflow valve 8. The first end of the second overflow valve 8 is connected to the connection between the accumulator 16 and the power oil tank, and the second end is connected to the connection between the first electromagnetic ball valve 2 and the X2 port. The first end of the two-way directional valve B is connected to the connection between the first electromagnetic ball valve 2 and the X2 port, and the second end is connected to the power oil tank. When the accumulator 16 accumulates too much oil, auxiliary oil discharge can be achieved.

[0057] Furthermore, it also includes a third relief valve 14 and a fourth relief valve 15, which are connected in parallel. A shut-off valve 13 is provided at the connection between the accumulator 16 and the power oil tank. Both ends of the third relief valve 14 and the fourth relief valve 15 are connected to the connection between the accumulator 16 and the power oil tank and are located on both sides of the shut-off valve 13, which can realize auxiliary oil discharge when the accumulator 16 fails to reduce the pressure of the system.

[0058] Furthermore, it also includes a fourth electromagnetic ball valve 9 and a throttle valve 10, which are connected in series. The first end of the throttle valve 10 is connected to the connection between the first electromagnetic ball valve 2 and the X2 port, and the second end of the fourth electromagnetic ball valve 9 is connected to the connection between the second electromagnetic ball valve 20 and the X3 port, so that the X2 port and the X3 port can be connected.

[0059] Furthermore, it also includes a second pressure sensor 22, a second pressure measuring joint 23, a third pressure sensor 24 and a third pressure measuring joint 25. The second pressure measuring joint 23 is connected to the connection node of the throttle valve 10, the first electromagnetic ball valve 2 and the X2 port, the third pressure measuring joint 25 is connected to the connection between the fourth electromagnetic ball valve 9 and the accumulator 16, the second pressure sensor 22 is connected to the second pressure measuring joint 23, the third pressure sensor 24 is connected to the third pressure measuring joint 25, the second pressure sensor 22 and the third pressure sensor 24 are connected to the broken belt control unit, and the pressure detected by the second pressure sensor 22 and the third pressure sensor 24 is identified by the broken belt control unit to facilitate monitoring of the pressure of the system and avoid excessive pressure in the system from damaging the system.

[0060] Furthermore, it also includes a first overflow valve 4, the first end of the first overflow valve 4 is connected between the third electromagnetic ball valve 21 and the X1 port, and the second end of the first overflow valve 4 is connected to the connection between the second T port and the power oil tank 29, which can realize auxiliary oil drainage and avoid the problem that the oil is difficult to be quickly discharged to the power oil tank 29 when the belt breaks.

[0061] Furthermore, it also includes a two-way directional valve A, a superimposed one-way valve 17, an electromagnetic reversing valve 18, a first pressure sensor 5 and a first pressure measuring joint 6. The two-way directional valve A has an internal channel, a first port and a second port.

[0062] The superimposed one-way valve 17 and the electromagnetic reversing valve 18 are connected in series, the top end of the electromagnetic reversing valve 18 is connected to the internal channel, the bottom end of the superimposed one-way valve 17 is connected to the second port, the first port is connected to the connection between the third electromagnetic ball valve 21 and the X1 port, the second port is connected to the power oil tank 29, the first pressure measuring joint 6 is connected to the connection between the third electromagnetic ball valve 21, the X1 port and the first port, and the first pressure sensor 5 is connected to the first pressure measuring joint 6, which can realize the discharge of oil from the X1 port to the power oil tank 29.

[0063] Specifically, the belt break control unit exchanges data with the second proportional servo valve 1, the first proportional servo valve 19, the first solenoid ball valve 2, the second solenoid ball valve 20, the third solenoid ball valve 21, the fourth solenoid ball valve 9, the first pressure sensor 5, the second pressure sensor 22, the third pressure sensor 24, and the solenoid reversing valve 18.

[0064] Preferably, the compound cylinder stretching mechanism is provided with position sensors BQ1 and BQ2, which are used to detect the stretching completion status of the compound cylinder stretching mechanism. The broken belt control unit outputs control signals for controlling the first proportional servo valve and the second proportional servo valve based on the signals collected by the position sensors BQ1 and BQ2, and there is a linear relationship between the position signal and the control signal.

[0065] Furthermore, the belt break control unit stores control logic;

[0066] When the belt-breaking control unit detects that the belt of the composite cylinder stretching mechanism is broken or about to be broken, it regulates the stretching buffer control valve group to perform buffering operation;

[0067] The specific control logic is:

[0068] Monitor the tensile force of the composite cylinder tensile mechanism,

[0069] ,

[0070] in, For time, For in time The tensile force, is the elastic coefficient, For in time displacement when

[0071] Monitor the change in tensile force,

[0072] ,

[0073] in, For time and time The change in tensile force between For time tensile force;

[0074] Determine the change in tensile force Whether it exceeds the set threshold , when the tensile force changes Exceeding the set threshold When a sudden change in tensile force occurs, the broken belt control unit starts regulating operation;

[0075] The belt break control unit adjusts the valve opening of the first proportional servo valve or the second proportional servo valve to adjust the oil flow of the first proportional servo valve or the second proportional servo valve, thereby regulating the pressure of the compound cylinder stretching mechanism to a set safe state to avoid belt breakage.

[0076] Specifically, if Figure 2 and Figure 3 As shown, Figure 2 Indicates setting threshold A graph showing changes over time, Figure 3 L1 represents the change in tensile force over time The target value (the change in tensile force at this target value) Always less than the set threshold ), L2 represents the change of tensile force over time Feedback value, due to the change in tensile force The feedback value fluctuates greatly, so the broken belt buffer unit needs to monitor the change of tensile force at any time and adjust the first proportional servo valve or the second proportional servo valve to avoid the change of tensile force. Exceeding the set threshold .

[0077] Specifically, the valve opening of the first proportional servo valve 19 is adjusted to adjust the flow Q, thereby controlling the pressure of the control system to reduce it to a safe range. The formula is as follows:

[0078]

[0079] in, is the oil flow of the first proportional servo valve 19, is the flow coefficient, The third pressure sensor detects the time and time The pressure difference between

[0080] The purpose of depressurizing the control system is achieved, so that the pressure of the control system returns to normal.

[0081] Specifically, when the belt breaking control unit detects that the pressure of the first pressure sensor is equal to the pressure feedback value of the composite cylinder stretching mechanism, the valve opening of the second proportional servo valve is adjusted. ,

[0082]

[0083] in, is the flow rate of the second proportional servo valve, The first pressure sensor detects the time and time The pressure difference between

[0084] The valve opening of the second servo valve is adjusted according to the pressure of the first pressure sensor and the pressure feedback value of the composite cylinder stretching mechanism, so that the oil flow rate reaches the required pressure relief rate until the pressure relief is completed.

[0085] Working principle of the present invention:

[0086] When the composite cylinder stretching mechanism performs the stretching operation through the stretching cylinder corresponding to the position sensor BQ2,

[0087] Oil is sucked from the power oil tank 29 through the pump group 28, and the oil passes through the pump outlet control valve group 27 and the stretching buffer control valve group 31. At this time, the belt break control unit controls the first electromagnetic ball valve 2, the fourth electromagnetic ball valve 9 and the second electromagnetic ball valve 20 to be electrically connected, and adjusts the valve opening of the first proportional servo valve 19. At this time, the oil is supplied to the X2 port and X3 port of the compound cylinder stretching mechanism through the first P port of the first proportional servo valve 19, realizing the forward and backward movement of the stretching cylinder in the compound cylinder stretching mechanism. When the stretching cylinder reaches the set position, the position sensor BQ2 sends a signal to the belt break control unit, and then the compound cylinder stretching mechanism quickly discharges oil through the X1 port and the two-way directional valve A;

[0088] When the belt breaks during stretching,

[0089] At the moment the sheet metal breaks, the cavity corresponding to port X3 instantly builds up pressure and discharges oil, which is initially buffered by the accumulator 16, and then buffered and discharged to port X2 through the first buffer valve 11 and the second buffer valve 26. Port X2 is connected to the power oil tank 29 through the two-way directional valve B to instantly absorb oil, so as to avoid negative pressure formed by suction at port X2 at the moment the sheet metal breaks. At the same time, the first overflow valve can assist in oil discharge.

[0090] When the composite cylinder stretching mechanism performs the stretching operation through the stretching cylinder corresponding to the position sensor BQ1,

[0091] Oil is sucked from the power oil tank 29 through the pump group 28, and passes through the pump outlet control valve group 27 and the stretching buffer control valve group 31. At this time, the belt break control unit controls the third electromagnetic ball valve 21 and the two-way directional valve A to be electrically connected, and adjusts the valve opening of the second proportional servo valve 1. At this time, the oil is supplied to the X1 port of the compound cylinder stretching mechanism through the second P port, and then controls the fourth electromagnetic ball valve 9 to be electrically connected, and the compound cylinder stretching mechanism is connected through the X2 port and the X3 port to achieve stretching of the compound cylinder stretching mechanism; when the stretching cylinder reaches the set position, the first pressure sensor 5 sends a signal to the belt break control unit, and the position sensor BQ1 sends a signal to the belt break control unit, and then the compound cylinder stretching mechanism quickly discharges oil through the X1 port and the two-way directional valve A;

[0092] When the belt breaks during stretching,

[0093] At the moment the sheet metal breaks, the cavity corresponding to port X3 instantly builds up pressure to discharge oil, which is initially buffered by the accumulator 16. Then, the oil is buffered and discharged to port X2 through the first buffer valve 11 and the second buffer valve 26. Port X2 is connected to the power oil tank 29 through the two-way directional valve B to instantly absorb oil, thereby avoiding negative pressure caused by suction at port X2 at the moment the sheet metal breaks.

[0094] After the stretching is completed, the valve opening of the second proportional servo valve 1 is adjusted, and the third electromagnetic ball valve 21 is electrically connected to release the pressure, thereby achieving the effect of alleviating the pressure relief shock.

[0095] The tension stretching machine composite cylinder stretching buffer control system provided by the present invention is suitable for the aerospace field and can meet the stretching requirements of thick plate aluminum alloy in this field. By setting a belt break control unit, it can monitor in real time whether a belt break occurs. When a belt break is detected, the belt break control unit adjusts the flow rate of the system's hydraulic medium and the system's pressure by regulating the stretching buffer control valve group, thereby buffering the impact of the belt break on the system, thereby effectively avoiding damage to the equipment due to the impact.

[0096] The present invention can realize active oil discharge and oil absorption; when the composite cylinder stretching mechanism is in action, the stretching cylinder passively discharges oil; the broken belt control unit monitors in real time, and when a broken belt is detected, the proportional servo valve is actively adjusted to play a buffering role, thereby reducing the impact of the broken belt on the equipment and protecting the equipment; after the stretching is completed, pressure relief is achieved by controlling the valve opening of the proportional servo valve and the electromagnetic ball valve, thereby achieving the effect of reducing the pressure relief impact.

[0097] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A tension-stretching composite cylinder stretching buffer control system, characterized in that: include: An oil supply module, the oil supply module comprising a power oil tank, a pump group and a pump outlet control valve group connected in sequence; A compound cylinder stretching mechanism, the compound cylinder stretching mechanism having an X1 port, an X2 port, and an X3 port, and the compound cylinder stretching mechanism is also provided with a belt breaking control unit; a stretching buffer control valve group, the stretching buffer control valve group being used to connect the oil supply module and the compound cylinder stretching mechanism, and the stretching buffer control valve group being connected to the belt breaking control unit; The stretching buffer control valve group includes a first proportional servo valve, a second proportional servo valve, a first electromagnetic ball valve, a second electromagnetic ball valve and a third electromagnetic ball valve; The first proportional servo valve includes a first A port, a first B port, a first P port, and a first T port, wherein the first P port is connected to the pump outlet control valve group, the first T port is connected to the power oil tank, the first A port is connected to the X2 port, the first B port is connected to the X3 port, the first electromagnetic ball valve is arranged between the first A port and the X2 port, and the second electromagnetic ball valve is arranged between the first B port and the X3 port; The second proportional servo valve includes a second A port, a second B port, a second P port, and a second T port, the second P port is connected to the pump outlet control valve group, the second T port is connected to the power oil tank, the second A port is connected to the X1 port, and the third electromagnetic ball valve is arranged between the second A port and the X1 port; When the belt-breaking control unit detects that the composite cylinder stretching mechanism is broken, the belt-breaking control unit regulates the pressure of the stretching buffer control valve group by controlling the first proportional servo valve and the second proportional servo valve to buffer the pressure of the composite cylinder stretching mechanism; The device further includes a first buffer valve and a second buffer valve, wherein the first buffer valve and the second buffer valve are connected in parallel, wherein the first ends of the first buffer valve and the second buffer valve are connected to the line between the first port A and the X2 port, and the second ends of the first buffer valve and the second buffer valve are connected to the line between the first port B and the X3 port; The device further includes a two-way safety valve, wherein a first end of the two-way safety valve is connected to the line between the first port A and the X2 port, and a second end of the two-way safety valve is connected to the line between the first port B and the X3 port; It also includes an accumulator, which is connected to the connection between the first T-port and the power oil tank; It also includes a fourth electromagnetic ball valve and a throttle valve, which are connected in series. The first end of the throttle valve is connected to the connection between the first electromagnetic ball valve and the X2 port, and the second end of the fourth electromagnetic ball valve is connected to the connection between the second electromagnetic ball valve and the X3 port.

2. The tension-stretching composite cylinder stretching buffer control system according to claim 1, characterized in that: It also includes a two-way directional valve B and a second overflow valve, the first end of the second overflow valve is connected to the connection between the accumulator and the power oil tank, and the second end is connected to the connection between the first electromagnetic ball valve and the X2 port, the first end of the two-way directional valve B is connected to the connection between the first electromagnetic ball valve and the X2 port, and the second end is connected to the power oil tank.

3. The tension-stretching composite cylinder stretching buffer control system according to claim 2, characterized in that: It also includes a third overflow valve and a fourth overflow valve, which are connected in parallel. A shut-off valve is provided at the connection between the accumulator and the power oil tank. Both ends of the third overflow valve and the fourth overflow valve are connected to the connection between the accumulator and the power oil tank and are located on both sides of the shut-off valve.

4. The tension-stretching composite cylinder stretching buffer control system according to claim 3, characterized in that: It also includes a second pressure sensor, a second pressure measuring joint, a third pressure sensor and a third pressure measuring joint. The second pressure measuring joint is connected to the connection node of the throttle valve, the first electromagnetic ball valve and the X2 port, the third pressure measuring joint is connected to the connection between the fourth electromagnetic ball valve and the accumulator, the second pressure sensor is connected to the second pressure measuring joint, and the third pressure sensor is connected to the third pressure measuring joint.

5. The tension-stretching composite cylinder stretching buffer control system according to claim 4, characterized in that: It also includes a first overflow valve, wherein a first end of the first overflow valve is connected between the third electromagnetic ball valve and the X1 port, and a second end of the first overflow valve is connected to the connection between the second T port and the power oil tank.

6. The tension-stretching composite cylinder stretching buffer control system according to claim 5, characterized in that: It also includes a two-way directional valve A, a superimposed one-way valve, an electromagnetic reversing valve, a first pressure sensor and a first pressure measuring joint, wherein the two-way directional valve A has an internal channel, a first port and a second port, The superimposed one-way valve and the electromagnetic reversing valve are connected in series, the top end of the electromagnetic reversing valve is connected to the internal channel, the bottom end of the superimposed one-way valve is connected to the second port, the first port is connected to the connection between the third electromagnetic ball valve and the X1 port, the second port is connected to the power oil tank, the first pressure measuring joint is connected to the connection between the third electromagnetic ball valve, the X1 port and the first port, and the first pressure sensor is connected to the first pressure measuring joint.

7. The tension-stretching composite cylinder stretching buffer control system according to claim 6, characterized in that: The broken belt control unit stores control logic; When the belt-breaking control unit detects that the composite cylinder stretching mechanism is broken or about to be broken, it regulates the stretching buffer control valve group to perform a buffering operation; The control logic is specifically as follows: Monitor the stretching force of the composite cylinder stretching mechanism, ， in, For time, For in time The tensile force, is the elastic coefficient, For in time displacement when Monitor the change in tensile force, ， in, For time and time The change in tensile force between For time tensile force; Determine the change in tensile force Whether it exceeds the set threshold , when the tensile force changes Exceeding the set threshold When it is determined that a sudden change in tensile force occurs, the broken belt control unit starts a regulating operation; The belt break control unit adjusts the valve opening of the first proportional servo valve or the second proportional servo valve to adjust the oil flow of the first proportional servo valve or the second proportional servo valve, thereby regulating the pressure of the compound cylinder stretching mechanism to a set safe state to avoid belt breakage.

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