CN101723262A - Control system of telescopic boom bolt mechanism - Google Patents
Control system of telescopic boom bolt mechanism Download PDFInfo
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- CN101723262A CN101723262A CN200810171123A CN200810171123A CN101723262A CN 101723262 A CN101723262 A CN 101723262A CN 200810171123 A CN200810171123 A CN 200810171123A CN 200810171123 A CN200810171123 A CN 200810171123A CN 101723262 A CN101723262 A CN 101723262A
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- oil cylinder
- hydraulic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/64—Jibs
- B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
- B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
- B66C23/708—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic locking devices for telescopic jibs
Abstract
The invention discloses a control system of a telescopic boom bolt mechanism, which comprises an oil tank, a hydraulic pump, a motor and a second directional control valve which are arranged on a telescopic boom, wherein the oil tank is used for storing hydraulic oil; the hydraulic pump is used for outputting the hydraulic oil in the oil tank into a hydraulic circuit; the motor is used for driving the hydraulic pump; and the second directional control valve is used for controlling the route between the hydraulic circuit and the hydraulic pump or the oil tank to be turned on. Preferably, the control system also comprises a third one-way valve, an energy accumulator and a pressure relay; when a pressure value detected by the pressure relay is more than a preset maximum pressure value, the pressure relay outputs control signals to the motor, and the motor is switched off; and when a pressure value detected by the pressure relay is less than the maximum pressure value, the pressure relay outputs control signals to the motor, and motor is switched on. The system has simple and reasonable design, and can effectively avoid the problem that hydraulic volume in a large chamber influences the control response speed, so as to ensure the sensitive and reliable motions of an arm pin hydro cylinder and a cylinder pin hydro cylinder.
Description
Technical field
The present invention relates to engineering machinery hydraulic control field, be specifically related to control system of telescopic boom bolt mechanism.
Background technology
Bolt mechanism is the crucial execution unit of hoister in large tonnage telescopic boom control in realizing, it is fixed on the cylinder head place of jib telescopic oil cylinder.See also Fig. 1, the figure shows the bolt mechanism work scheme drawing of single acting oil cylinder control, as shown in Figure 1a, arm pin 10 is stretching out under the effect of arm pin spring 20 to realize the locking between the alternate arm joint, and cylinder pin 30 is stretching out under the effect of cylinder pin spring 40 to realize the locking between arm joint and the oil cylinder; Shown in Fig. 1 b, the release of arm pin 10 between withdrawal under the drive of arm pin oil cylinder (not shown) saves with the realization alternate arm; Shown in Fig. 1 c, cylinder pin 30 is being withdrawn under the drive of cylinder pin oil cylinder (not shown) to realize the release between arm joint and the oil cylinder.In the flexible operating process of telescopic crane boom, need to carry out between arm pin 10 and the cylinder pin 30 cooperation of interactive action, to guarantee the safe reliability of the flexible operation of arm joint.
The control system of existing bolt mechanism mainly contains two kinds of implementations, and two kinds of schemes are all got hydraulic oil from what be arranged on rotating platform of crane by engine-driven pump.Wherein, a kind of mode is to arrange a flexible core pipe in the axle center of telescoping cylinder, and this control system is single-acting control, and described flexible core pipe is as the control oil passage of bolt mechanism control system, to realize the control to arm pin oil cylinder and cylinder pin oil cylinder.But in order to eliminate the influence of core pipe pressurization back to the telescoping cylinder stressing conditions, hydraulic control system need cooperate carries out complicated design, and pump needs big discharge capacity and long-time running, the problem that exists energy consumption to increase; In addition, be subjected to the restriction of flexible core tubular construction mode, tooling cost is higher.Another kind of mode is to utilize two hydraulic hose reels to realize the two-way fuel feeding, and this control system is double acting control, and the required arrangement space of hose reel is bigger, and the flexible pipe connection reliability is relatively poor.
Because the control system of existing bolt mechanism is all grown the oil of getting of distance from rotating platform of crane, pipeline is longer, and the liquid of big cavity volume holds the control response speed that influences.Therefore, above-mentioned two kinds of schemes all exist the problem of control hysteresis.
Summary of the invention
At above-mentioned defective, the technical matters that the present invention solves is, a kind of control system of telescopic boom bolt mechanism is provided, and the reliability that makes bolt mechanism control effectively avoids the problem of control hysteresis to take place.
Bolt mechanism based on single-acting control, control system of telescopic boom bolt mechanism provided by the invention, comprise bolt mechanism and be arranged on first direction control cock, first check valve and second check valve on the telescopic boom with arm pin oil cylinder and cylinder pin oil cylinder, described arm pin oil cylinder and cylinder pin oil cylinder are single acting oil cylinder, and described first direction control cock is used for the path conducting between modulated pressure oil circuit and cylinder pin oil cylinder or the arm pin oil cylinder; Described first check valve is serially connected between described cylinder pin oil cylinder and the hydraulic circuit, realizes that cylinder pin oil cylinder is to the unidirectional conducting of the oil circuit between the hydraulic circuit; Described second check valve is serially connected between described arm pin oil cylinder and the hydraulic circuit, realizes that arm pin oil cylinder is to the unidirectional conducting of oil circuit between the hydraulic coupling road; Also comprise the fuel tank, Hydraulic Pump, motor and the second direction control cock that are arranged on the telescopic boom, described fuel tank is used to store hydraulic oil; Described Hydraulic Pump is used for exporting the hydraulic oil of fuel tank to hydraulic circuit; Described motor is used to drive Hydraulic Pump; Described second direction control cock is used for the path conducting between modulated pressure oil circuit and Hydraulic Pump or the fuel tank.
Preferably, also comprise the 3rd check valve, energy storage and pressure relay; Described the 3rd check valve is serially connected between described Hydraulic Pump and the second direction control cock, realizes that Hydraulic Pump is to the unidirectional conducting of oil circuit between the second direction control cock; The inlet of described energy storage is communicated with path between described the 3rd check valve and the second direction control cock; The liquid taking port of described pressure relay is communicated with path between described the 3rd check valve and the second direction control cock; The force value that detects when described pressure relay outputs control signals to motor, the motor outage during greater than default maximum pressure value; The force value that detects when described pressure relay outputs control signals to motor during less than default maximum pressure value, and motor gets.
Preferably, also comprise the electromagnetism directional control valve, be used to control path conducting between described Hydraulic Pump and the fuel tank or non-conduction; The force value that detects when described pressure relay outputs control signals to described electromagnetism directional control valve, the path conducting between Hydraulic Pump and the fuel tank during greater than default maximum pressure value; The force value that detects when described pressure relay is during less than default maximum pressure value, output control signals to described electromagnetism directional control valve, described pressure relay output control electric signal is to described electromagnetism directional control valve, and the path between Hydraulic Pump and the fuel tank is non-conduction.
Preferably, also comprise by pass valve, and described electromagnetism directional control valve is arranged in parallel on the path between Hydraulic Pump oil discharge outlet and the fuel tank.
Bolt mechanism based on double acting control, control system of telescopic boom bolt mechanism provided by the invention, comprise bolt mechanism with arm pin oil cylinder and cylinder pin oil cylinder and be arranged on third direction control cock on the telescopic boom and the four directions to control cock, described arm pin oil cylinder and cylinder pin oil cylinder are two-way cylinder; Described third direction control cock is used for the rod chamber of modulated pressure oil circuit and arm pin oil cylinder or the path conducting between the rodless cavity; Described four directions is used for the rod chamber of modulated pressure oil circuit and cylinder pin oil cylinder or the path conducting between the rodless cavity to control cock; Also comprise the fuel tank, Hydraulic Pump, motor and the 5th directional control valve that are arranged on the telescopic boom, described fuel tank is used to store hydraulic oil; Described Hydraulic Pump is used for exporting the hydraulic oil of fuel tank to hydraulic circuit; Described motor is used to drive Hydraulic Pump; Described the 5th directional control valve is used for modulated pressure oil circuit and the path conducting between control cock of third direction control cock or four directions.
Preferably, also comprise the 3rd check valve, energy storage and pressure relay, described the 3rd check valve is serially connected between described Hydraulic Pump and the 5th directional control valve, realizes the unidirectional conducting of pressure oil circuit between Hydraulic Pump to the five directional control valves; The inlet of described energy storage is communicated with path between described the 3rd check valve and the 5th directional control valve; The liquid taking port of described pressure relay is communicated with path between described the 3rd check valve and the 5th directional control valve; The force value that detects when described pressure relay outputs control signals to motor, the motor outage during greater than default maximum pressure value; The force value that detects when described pressure relay outputs control signals to motor during less than default maximum pressure value, and motor gets.
Preferably, also comprise the electromagnetism directional control valve, be used to control path conducting between described Hydraulic Pump and the fuel tank or non-conduction; The force value that detects when described pressure relay outputs control signals to described electromagnetism directional control valve, the path conducting between Hydraulic Pump and the fuel tank during greater than default maximum pressure value; The force value that detects when described pressure relay is during less than default maximum pressure value, output control signals to described electromagnetism directional control valve, described pressure relay output control electric signal is to described electromagnetism directional control valve, and the path between Hydraulic Pump and the fuel tank is non-conduction.
Preferably, also comprise by pass valve, and described electromagnetism directional control valve is arranged in parallel on the path between Hydraulic Pump oil discharge outlet and the fuel tank.
Control system of telescopic boom bolt mechanism provided by the invention compared with prior art, in the bolt mechanism control system of existing single-acting control and double acting control, the hydraulic oil of Control arm pin oil cylinder and cylinder pin cylinder action is all from the main oil supply system at rotating platform of crane place, hydraulic tubing is longer, because the liquid of big cavity volume holds the speed of response that oil cylinder is carried out in influence, exist the problem of control hysteresis.And control system of telescopic boom bolt mechanism provided by the invention, be equipped with the fuel feeding assembly that is arranged on the telescopic boom separately for bolt mechanism: the fuel tank on the telescopic boom, Hydraulic Pump, motor and second direction control cock, according to the real space of telescopic boom inner chamber with above-mentioned fuel feeding arrangement of components in the telescopic boom inner chamber at bolt mechanism place; Because oil pump is apart from the close together between arm pin oil cylinder and the cylinder pin oil cylinder, oil feed line is shorter, therefore, has avoided the liquid of big cavity volume to hold the problem that influences control response speed effectively, can guarantee arm pin oil cylinder and cylinder pin cylinder action sensitivity, reliable.
In preferred version of the present invention, be provided with the 3rd check valve, energy storage and pressure relay, wherein, the 3rd check valve is arranged between Hydraulic Pump and the described second direction control cock, through the unidirectional conducting of fluid of Hydraulic Pump output, the settling pressure of energy storage can satisfy the needs of actuating unit.During initialization, the driven by motor hydraulic pump works, pressure oil enters by check valve, energy storage can store a certain amount of hydraulic oil, the force value of gathering when pressure relay outputs control signals to motor during greater than predetermined maximum pressure value, and the motor outage quits work, at this moment, energy storage provides the pressure oil that meets job requirement to system; The force value of gathering when pressure relay outputs control signals to motor during less than the predetermined minimum pressure value, and motor must be established beginning work by cable, and at this moment, Hydraulic Pump is to system's fuel feeding, and energy storage continues oil storage; Circulation according to this.The non real-time work of motor prevents motor overheating in the control process of total system, and then the system of assurance normal operation; In addition, in the discontinuous control that adapts to cylinder pin and arm pin, can reduce energy resource consumption.
Description of drawings
Fig. 1 a is the cutaway view of running condition of the bolt mechanism of existing single-acting control; Fig. 1 b shows the arm pin retracted state scheme drawing of existing bolt mechanism; Fig. 1 c shows the cylinder pin retracted state scheme drawing of existing bolt mechanism;
Fig. 2 is the hydraulic schematic diagram of the control system of telescopic boom bolt mechanism of single-acting control provided by the present invention;
Fig. 3 is the hydraulic schematic diagram of the control system of telescopic boom bolt mechanism of double acting control provided by the present invention.
Among Fig. 2 and Fig. 3:
Cylinder pin oil cylinder 1, arm pin oil cylinder 2, fuel tank 3, Hydraulic Pump 4, motor 5, first direction control cock 6, first check valve 7, second check valve 8, second direction control cock 9, the 3rd check valve 11, energy storage 12, pressure relay 13, electromagnetism directional control valve 14, by pass valve 15, the 5th directional control valve 16, third direction control cock 17, four directions are to control cock 18.
The specific embodiment
Core concept of the present invention is, on telescopic boom, be provided with the fuel feeding assembly of bolt mechanism control system: motor, Hydraulic Pump, fuel tank and relevant control cock etc., the oil feed line of Control arm pin oil cylinder and cylinder pin cylinder action is shorter, can avoid the long problem that influences control response speed of pipeline, significantly reduce energy resource consumption simultaneously.
Specify present embodiment below in conjunction with Figure of description.
See also Fig. 1, this figure is the hydraulic schematic diagram of the telescopic boom pin mechanism control system of single-acting control.
As shown in Figure 1, the cylinder pin oil cylinder 1 and the arm pin oil cylinder 2 of bolt mechanism are single acting oil cylinder, are provided with spring in the rodless cavity of cylinder pin oil cylinder 1 and arm pin oil cylinder 2, and during normality, under the effect of spring, cylinder pin or arm pin are and stretch out lock-out state; Hydraulic oil acts on the rod chamber of oil cylinder, is used for the withdrawal unlocking operation of control cylinder pin or arm pin.
First direction control cock 6 is used for the path conducting between modulated pressure oil circuit and cylinder pin oil cylinder or the arm pin oil cylinder; Described first direction control cock 6 has two mode of operations, under first state, and the path conducting between hydraulic circuit and cylinder pin oil cylinder 1 rod chamber, the path between hydraulic circuit and arm pin oil cylinder 2 rod chambers is non-conduction; Under second state, the path conducting between hydraulic circuit and arm pin oil cylinder 2 rod chambers, the path between hydraulic circuit and cylinder pin oil cylinder 1 rod chamber is non-conduction.When needs cylinder pin stretches out or during recovery operation, the arm pin is in and stretches out lock-out state, when needs arm pin stretches out or during recovery operation, the cylinder pin is in and stretches out lock-out state, has guaranteed the operation requirements of cylinder pin and the asynchronous motion of arm pin.Described first direction control cock 6 adopts guiding valve or ball valve all can satisfy and uses needs, and shown in the figure, described first direction control cock 6 is selected the better ball valve of closed performance for use, to reduce the speed of response that loss of pressure further improves power element.
Second check valve 8 is serially connected between described arm pin oil cylinder 2 and the hydraulic circuit, realizes that arm pin oil cylinder 2 is to the unidirectional conducting of oil circuit between the hydraulic coupling road; When stopping to arm pin oil cylinder 2 fuel feeding, under the effect of arm pin oil cylinder 2 rodless cavity medi-springs, the fluid in its rod chamber flows back to fuel tank through described first check valve 7, realizes that the arm pin stretches out operation.
Second direction control cock 9 is used for the path conducting between modulated pressure oil circuit and Hydraulic Pump 4 or the fuel tank 3.That is to say that described second direction control cock 9 has two mode of operations, under first state, the oil discharge outlet of described Hydraulic Pump 4 and hydraulic circuit conducting, this moment, system provided pressurised fluid stream for cylinder pin oil cylinder 1 or arm pin oil cylinder 2 rod chambers; Under second state, conducting between hydraulic circuit and the fuel tank 3, this moment, the fluid of cylinder pin oil cylinder 1 or arm pin oil cylinder 2 rod chambers flowed back to fuel tank 3 through described second direction control cock 9.
Further, as shown in Figure 2, also comprise the 3rd check valve 11, energy storage 12 and pressure relay 13.
The 3rd check valve 11 is serially connected between described Hydraulic Pump 4 and the second direction control cock 9, realizes that Hydraulic Pump 4 is to the unidirectional conducting of oil circuit between the second direction control cock 9.
The inlet of described energy storage 12 is communicated with path between described the 3rd check valve 11 and the second direction control cock 9, energy storage 12 carried out the deposit of hydraulic oil when pressure oil provided pressure oil liquid through described the 3rd check valve 11 for execution unit, for preparing to the hydraulic circuit fuel feeding separately.
The liquid taking port of described pressure relay 13 is communicated with path between described the 3rd check valve 11 and the second direction control cock 9, is used to detect the system pressure value in the 3rd check valve 11 downstreams, i.e. the force value of fluid in the energy storage 12; The force value that detects when described pressure relay 13 outputs control signals to motor 5 during greater than default maximum pressure value, motor 5 outages, and at this moment, cylinder pin oil cylinder 1 or arm pin oil cylinder 2 are regained needed pressurised fluid stream to be provided by energy storage 12; The force value that detects when described pressure relay 13 is during less than default maximum pressure value, output control signals to motor 5, motor 5 gets electric, at this moment, Hydraulic Pump 4 provides deposit fluid for energy storage 12 simultaneously for cylinder pin oil cylinder 1 or arm pin oil cylinder 2 provide required operating fluid stream; Circulation according to this.In the control process of total system, described motor 5, Hydraulic Pump 4 are non real-time work, in the discontinuous control that adapts to cylinder pin and arm pin, and further energy efficient.
Further, as shown in Figure 2, also comprise electromagnetism directional control valve 14, be used to control path conducting between described Hydraulic Pump 4 and the fuel tank 3 or non-conduction; Described electromagnetism directional control valve 14 has two mode of operations, the force value that detects when described pressure relay 13 is greater than default maximum pressure value, also output control signals to electromagnetism directional control valve 14 when outputing control signals to motor 5, this moment, described electromagnetism directional control valve 14 was in first mode of operation, path conducting between Hydraulic Pump 4 and the fuel tank 3, that is to say, when the 5 out-of-work whiles of needs motor, the oil discharge outlet of Hydraulic Pump 4 is communicated with fuel tank 3 simultaneously, avoid motor 5 to work on and cause system pressure too high, reduce by 12 service lifes such as element such as grade of energy storage; The force value that detects when described pressure relay 13 is less than default maximum pressure value, also output control signals to described electromagnetism directional control valve 14 when outputing control signals to motor 5, this moment, described electromagnetism directional control valve 14 was in second mode of operation, pressure relay output control electric signal is to described electromagnetism directional control valve, described pressure relay output control electric signal is to described electromagnetism directional control valve, path between Hydraulic Pump and the fuel tank is non-conduction, that is, and and normal working.
In addition, by pass valve 15 and described electromagnetism directional control valve 14 are arranged in parallel on the path between Hydraulic Pump 4 oil discharge outlets and the fuel tank 3.
The control process of the control system of telescopic boom bolt mechanism of the described single-acting control of brief description.
Cylinder pin recovery operation: motor 5 drives Hydraulic Pump 4 work, and second direction control cock 9 is in first mode of operation, and first direction control cock 6 is in first mode of operation; Pressure oil inputs to the rod chamber of cylinder pin oil cylinder 1 through check valve 11, second direction control cock 9 and first direction control cock 6, and cylinder pin oil cylinder 1 drives the cylinder pin and regains.
The cylinder pin stretches out operation: second direction control cock 9 is in second mode of operation, and under the effect of cylinder pin oil cylinder 1 rodless cavity medi-spring, the fluid in the rod chamber flows back to fuel tank through first check valve 7 and second direction control cock 9, and the cylinder pin stretches out.
Arm pin recovery operation: motor 5 drives Hydraulic Pump 4 work, and second direction control cock 9 is in first mode of operation, and first direction control cock 6 is in second mode of operation; Pressure oil inputs to the rod chamber of arm pin oil cylinder 2 through check valve 11, second direction control cock 9 and first direction control cock 6, and arm pin oil cylinder 2 drives the arm pins and regains.
The arm pin stretches out operation: second direction control cock 9 is in second mode of operation, and under the effect of arm pin oil cylinder 2 rodless cavity medi-springs, the fluid in the rod chamber flows back to fuel tank through second check valve 8 and second direction control cock 9, and the arm pin stretches out.
Above-mentioned telescopic boom pin mechanism control system is based on the concrete scheme that single-acting cylinder, arm pin oil cylinder have been done, and specifies at double acting control control system of telescopic boom bolt mechanism below.
See also Fig. 3, this figure is the hydraulic schematic diagram of the control system of telescopic boom bolt mechanism of double acting control.
As shown in Figure 3, the cylinder pin oil cylinder 1 of bolt mechanism ' and arm pin oil cylinder 2 ' be two-way cylinder, when pressure oil acts on oil cylinder rodless cavity, be used for the lock operation that stretches out of control cylinder pin or arm pin; When pressure oil acts on cylinder rod chamber, be used for the withdrawal unlocking operation of control cylinder pin or arm pin.
Third direction control cock 17 be used for modulated pressure oil circuit and arm pin oil cylinder 2 ' rod chamber or the path conducting between the rodless cavity; Described third direction control cock 17 has two mode of operations, under first state, described arm pin oil cylinder 2 ' rodless cavity and the conducting of pressure oil circuit, described arm pin oil cylinder 2 ' rod chamber and oil return circuit conducting, this moment, the arm pin was in the state of stretching out; Under second state, described arm pin oil cylinder 2 ' rod chamber and the conducting of pressure oil circuit, described arm pin oil cylinder 2 ' rodless cavity and oil return circuit conducting, this moment, the arm pin was in retracted state.
The four directions to control cock 18 be used for modulated pressure oil circuit and cylinder pin oil cylinder 1 ' rod chamber or the path conducting between the rodless cavity; Described four directions has two mode of operations to control cock 18, under first state, described cylinder pin oil cylinder 1 ' rodless cavity and the conducting of pressure oil circuit, described cylinder pin oil cylinder 1 ' rod chamber and oil return circuit conducting, this moment, the cylinder pin was in the state of stretching out; Under second state, described cylinder pin oil cylinder 1 ' rod chamber and the conducting of pressure oil circuit, described cylinder pin oil cylinder 1 ' rodless cavity and oil return circuit conducting, this moment, the cylinder pin was in retracted state.
The 5th directional control valve 16 is used for modulated pressure oil circuit and the path conducting between control cock 18 of third direction control cock 17 or four directions.Described the 5th directional control valve 16 has two mode of operations, and under first state, system pressure oil circuit and oil return circuit are communicated with third direction control cock 17 respectively, can carry out cylinder pin oil cylinder 1 ' operation; Under second state, system pressure oil circuit and oil return circuit are communicated with to control cock 18 with the four directions respectively, can carry out arm pin oil cylinder 2 ' operation.
This programme is identical with the single-acting control system, also comprise the 3rd check valve 11 ', energy storage 12 ' and pressure relay 13 ', to guarantee the oil pump trouble free service; Wherein, the described Hydraulic Pump 4 of described the 3rd check valve 11 ' be serially connected in ' and the 5th directional control valve 16 between, realize Hydraulic Pump 4 ' to the unidirectional conducting of pressure oil circuit between the 5th directional control valve 16; Described energy storage 12 ' inlet and described the 3rd check valve 11 ' and the 5th directional control valve 16 between path be communicated with; Described pressure relay 13 ' liquid taking port and described the 3rd check valve 11 ' and the 5th directional control valve 16 between path be communicated with; When the force value of described pressure relay 13 ' detection during greater than default maximum pressure value, output control signals to motor 5 ', motor 5 ' outage; When the force value of described pressure relay 13 ' detection during less than default maximum pressure value, output control signals to motor 5 ', motor 5 '.
Similarly, also comprise electromagnetism directional control valve 14 ', be used to control described Hydraulic Pump 4 ' and fuel tank 3 ' between path conducting or non-conduction; When the force value of described pressure relay 13 ' detection during greater than default maximum pressure value, output control signals to described electromagnetism directional control valve 14 ', Hydraulic Pump 4 ' and fuel tank 3 ' between the path conducting; When the force value of described pressure relay 13 ' detection during less than default maximum pressure value, output control signals to described electromagnetism directional control valve 14 ', described pressure relay 13 ' output control electric signal to described electromagnetism directional control valve 14 ', Hydraulic Pump 4 ' and fuel tank 3 ' between path non-conduction; Also comprise by pass valve 15 ', and described electromagnetism directional control valve 14 ' be arranged in parallel Hydraulic Pump 4 ' oil discharge outlet and fuel tank 3 ' between path on.
The control process of the control system of telescopic boom bolt mechanism of the described double acting control of brief description.
Cylinder pin recovery operation: motor 5 drives Hydraulic Pump 4 work, and the 5th directional control valve 16 is in first mode of operation, and the four directions is in second mode of operation to control cock 18; Pressure oil through check valve 11, the 5th directional control valve 16 and four directions to control cock 18 input to cylinder pin oil cylinder 1 ' rod chamber, the fluid of cylinder pin oil cylinder 1 ' rodless cavity through the four directions to control cock 18 and the 5th directional control valve 16 flow back to fuel tank 3 ', cylinder pin oil cylinder 1 ' drive cylinder pin is regained.
The cylinder pin stretches out operation: the four directions is in first mode of operation to control cock 18, pressure oil through check valve 11, the 5th directional control valve 16 and four directions to control cock 18 input to cylinder pin oil cylinder 1 ' rodless cavity, the fluid of cylinder pin oil cylinder 1 ' rod chamber through the four directions to control cock 18, the 5th directional control valve 16 flow back to fuel tank 3 ', cylinder pin oil cylinder 1 ' drive cylinder pin stretches out.
Arm pin recovery operation: motor 5 drives Hydraulic Pump 4 work, and the 5th directional control valve 16 is in second mode of operation, and third direction control cock 17 is in second mode of operation; Pressure oil through check valve 11, the 5th directional control valve 16 and third direction control cock 17 input to arm pin oil cylinder 2 ' rod chamber, the fluid of arm pin oil cylinder 2 ' rodless cavity through third direction control cock 17, the 5th directional control valve 16 flow back to fuel tank 3 ', arm pin oil cylinder 2 ' drive cylinder pin is regained.
The cylinder pin stretches out operation: third direction control cock 17 is in first mode of operation, pressure oil through check valve 11, the 5th directional control valve 16 and third direction control cock 17 input to arm pin oil cylinder 2 ' rodless cavity, the fluid of arm pin oil cylinder 2 ' rod chamber through third direction control cock 17, the 5th directional control valve 16 flow back to fuel tank 3 ', arm pin oil cylinder 2 ' drive cylinder pin stretches out.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (8)
1. control system of telescopic boom bolt mechanism comprises:
Bolt mechanism with arm pin oil cylinder and cylinder pin oil cylinder, described arm pin oil cylinder and cylinder pin oil cylinder are single acting oil cylinder;
Be arranged on the first direction control cock on the telescopic boom, be used for the path conducting between modulated pressure oil circuit and cylinder pin oil cylinder or the arm pin oil cylinder;
First check valve is serially connected between described cylinder pin oil cylinder and the hydraulic circuit, realizes that cylinder pin oil cylinder is to the unidirectional conducting of the oil circuit between the hydraulic circuit; With
Second check valve is serially connected between described arm pin oil cylinder and the hydraulic circuit, realizes that arm pin oil cylinder is to the unidirectional conducting of oil circuit between the hydraulic coupling road; It is characterized in that, also comprise being arranged on the telescopic boom:
Fuel tank is used to store hydraulic oil;
Hydraulic Pump is used for exporting the hydraulic oil of fuel tank to hydraulic circuit;
Motor is used to drive Hydraulic Pump; With
The second direction control cock is used for the path conducting between modulated pressure oil circuit and Hydraulic Pump or the fuel tank.
2. control system of telescopic boom bolt mechanism according to claim 1 is characterized in that, also comprises:
The 3rd check valve is serially connected between described Hydraulic Pump and the second direction control cock, realizes that Hydraulic Pump is to the unidirectional conducting of oil circuit between the second direction control cock;
Energy storage, its inlet is communicated with path between described the 3rd check valve and the second direction control cock; With
Pressure relay, its liquid taking port is communicated with path between described the 3rd check valve and the second direction control cock;
The force value that detects when described pressure relay outputs control signals to motor, the motor outage during greater than default maximum pressure value; The force value that detects when described pressure relay outputs control signals to motor during less than default maximum pressure value, and motor gets.
3. control system of telescopic boom bolt mechanism according to claim 1 and 2 is characterized in that, also comprises:
The electromagnetism directional control valve is used to control path conducting between described Hydraulic Pump and the fuel tank or non-conduction;
The force value that detects when described pressure relay outputs control signals to described electromagnetism directional control valve, the path conducting between Hydraulic Pump and the fuel tank during greater than default maximum pressure value; The force value that detects when described pressure relay is during less than default maximum pressure value, output control signals to described electromagnetism directional control valve, described pressure relay output control electric signal is to described electromagnetism directional control valve, and the path between Hydraulic Pump and the fuel tank is non-conduction.
4. control system of telescopic boom bolt mechanism according to claim 3 is characterized in that, also comprises:
By pass valve, and described electromagnetism directional control valve is arranged in parallel on the path between Hydraulic Pump oil discharge outlet and the fuel tank.
5. control system of telescopic boom bolt mechanism comprises:
Bolt mechanism with arm pin oil cylinder and cylinder pin oil cylinder, described arm pin oil cylinder and cylinder pin oil cylinder are two-way cylinder;
Be arranged on the third direction control cock on the telescopic boom, be used for the rod chamber of modulated pressure oil circuit and arm pin oil cylinder or the path conducting between the rodless cavity;
Be arranged on four directions on the telescopic boom to control cock, be used for the rod chamber of modulated pressure oil circuit and cylinder pin oil cylinder or the path conducting between the rodless cavity; It is characterized in that, also comprise being arranged on the telescopic boom:
Fuel tank is used to store hydraulic oil;
Hydraulic Pump is used for exporting the hydraulic oil of fuel tank to hydraulic circuit;
Motor is used to drive Hydraulic Pump; With
The 5th directional control valve is used for the path conducting between control cock of modulated pressure oil circuit and third direction control cock or four directions.
6. control system of telescopic boom bolt mechanism according to claim 5 is characterized in that, also comprises:
The 3rd check valve is serially connected between described Hydraulic Pump and the 5th directional control valve, realizes the unidirectional conducting of pressure oil circuit between Hydraulic Pump to the five directional control valves;
Energy storage, its inlet is communicated with path between described the 3rd check valve and the 5th directional control valve; With
Pressure relay, its liquid taking port is communicated with path between described the 3rd check valve and the 5th directional control valve;
The force value that detects when described pressure relay outputs control signals to motor, the motor outage during greater than default maximum pressure value; The force value that detects when described pressure relay outputs control signals to motor during less than default maximum pressure value, and motor gets.
7. according to claim 5 or 6 described control system of telescopic boom bolt mechanism, it is characterized in that, also comprise:
The electromagnetism directional control valve is used to control path conducting between described Hydraulic Pump and the fuel tank or non-conduction;
The force value that detects when described pressure relay outputs control signals to described electromagnetism directional control valve, the path conducting between Hydraulic Pump and the fuel tank during greater than default maximum pressure value; The force value that detects when described pressure relay is during less than default maximum pressure value, output control signals to described electromagnetism directional control valve, described pressure relay output control electric signal is to described electromagnetism directional control valve, and the path between Hydraulic Pump and the fuel tank is non-conduction.
8. control system of telescopic boom bolt mechanism according to claim 7 is characterized in that, also comprises:
By pass valve, and described electromagnetism directional control valve is arranged in parallel on the path between Hydraulic Pump oil discharge outlet and the fuel tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101711236A CN101723262B (en) | 2008-10-15 | 2008-10-15 | Control system of telescopic boom bolt mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN102619794A (en) * | 2012-03-28 | 2012-08-01 | 三一汽车起重机械有限公司 | Single-cylinder bolt expansion and contraction control system and construction machine |
| CN102619794B (en) * | 2012-03-28 | 2014-12-10 | 三一汽车起重机械有限公司 | Single-cylinder bolt expansion and contraction control system and construction machine |
| CN102637047A (en) * | 2012-04-12 | 2012-08-15 | 中联重科股份有限公司 | Telescopic follow-up control method and system of suspension arm |
| CN102705275A (en) * | 2012-06-25 | 2012-10-03 | 三一重工股份有限公司 | Hydraulic control system for bolt and engineering machinery |
| CN102705275B (en) * | 2012-06-25 | 2014-12-17 | 三一重工股份有限公司 | Hydraulic control system for bolt and engineering machinery |
| CN102730563A (en) * | 2012-07-06 | 2012-10-17 | 徐州重型机械有限公司 | Wheeled crane and electronic control steering hydraulic control system thereof |
| CN102807168A (en) * | 2012-08-13 | 2012-12-05 | 三一重工股份有限公司 | Hydraulic control system of single-cylinder telescoping mechanism of crane and crane |
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| CN103790891A (en) * | 2012-10-29 | 2014-05-14 | 特雷克斯起重机德国有限公司 | Telescopic unit with additional functionality |
| CN103438034A (en) * | 2013-09-03 | 2013-12-11 | 徐州重型机械有限公司 | Hydraulic system and control method of single-cylinder pin type telescopic arm and crane |
| CN103452962A (en) * | 2013-09-11 | 2013-12-18 | 冯广建 | Controller for transforming start-up sequentially |
| CN103539013A (en) * | 2013-11-07 | 2014-01-29 | 徐州重型机械有限公司 | Telescopic boom pin unlocking control device, crane and control method thereof |
| CN103539013B (en) * | 2013-11-07 | 2015-06-17 | 徐州重型机械有限公司 | Telescopic boom pin unlocking control device, crane and control method thereof |
| CN105197821A (en) * | 2015-09-07 | 2015-12-30 | 徐州重型机械有限公司 | Telescopic system capable of preventing core tube from inhaling empty and crane |
| CN105197821B (en) * | 2015-09-07 | 2017-03-01 | 徐州重型机械有限公司 | Telescopic system and crane that the anti-core pipe of energy is emptied |
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| CN108799219B (en) * | 2018-07-09 | 2020-06-30 | 三一汽车起重机械有限公司 | Crane and single-cylinder bolt type telescopic mechanism hydraulic control system thereof |
| CN108799219A (en) * | 2018-07-09 | 2018-11-13 | 三汽车起重机械有限公司 | Crane and its hydraulic control system for single-cylinder bolt type telescopic mechanism |
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| US20230356986A1 (en) * | 2019-08-21 | 2023-11-09 | Tadano Ltd. | Work vehicle |
| CN111847280A (en) * | 2020-08-03 | 2020-10-30 | 湖南三一中型起重机械有限公司 | Pin pulling device, crane and pin pulling method |
| CN112456337A (en) * | 2020-12-02 | 2021-03-09 | 太原重工股份有限公司 | Telescopic boom plug pin mechanism control device and crane |
| CN113093641A (en) * | 2021-04-01 | 2021-07-09 | 湖南鸿辉科技有限公司 | Automatic bolt control system and method |
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