CN210528290U - Pressure regulating system and crane - Google Patents
Pressure regulating system and crane Download PDFInfo
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- CN210528290U CN210528290U CN201921674091.1U CN201921674091U CN210528290U CN 210528290 U CN210528290 U CN 210528290U CN 201921674091 U CN201921674091 U CN 201921674091U CN 210528290 U CN210528290 U CN 210528290U
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Abstract
The embodiment of the utility model provides a pressure regulating system and hoist relates to the hydraulic system field. The problem that in the current system that turns to and landing leg pressure regulating, the valve piece is many, and the system is more complicated is intended to be improved. The pressure regulating system comprises a steering subsystem and a supporting leg subsystem; the main control subsystem comprises an oil supply pipeline, a main reversing valve and an electric proportional overflow valve, wherein the main reversing valve and the electric proportional overflow valve are arranged on the oil supply pipeline; the electric proportional overflow valve is used for adjusting the oil pressure in the oil supply pipeline. The crane comprises a pressure regulating system. The proportional overflow valves are used for adjusting the oil pressure in the oil supply pipeline so as to respectively adjust the oil pressure in the steering subsystem and the oil pressure in the landing leg subsystem, and the adjustment of the oil pressure of the steering subsystem and the oil pressure of the landing leg subsystem is realized only through one proportional overflow valve.
Description
Technical Field
The utility model relates to a hydraulic system field particularly, relates to a pressure regulating system and hoist.
Background
With the development of computer science and technology, digitization gradually becomes the mainstream trend of engineering machinery development, digitization of a hydraulic system must be improved on the basis of the existing principle and elements, and pressure regulation, pressure presetting, pressure detection, flow detection and the like of the hydraulic system are projects which must be developed on the future digitization road.
From the technical point of view, all the hydraulic pressure energy is used as a transmission medium, a safety valve, an overload valve and a pressure limiting valve are arranged to limit the highest working pressure of the system, and the essential of the system is to protect important core components such as a hydraulic system pump, a motor, an oil cylinder and the like through an overflow valve. The direct-acting overflow valve is selected for small flow, and the pilot-operated overflow valve is selected for large flow.
In the crane, the actions of the lower landing leg, the running steering and the boarding rotation action are not coincident, the working pressures of the lower landing leg, the running steering and the boarding rotation are different, the overload protection of the landing leg and the steering needs to be separately protected by pressure limiting, and the problems of more arranged valve blocks and more complex pressure regulating system exist.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a pressure regulating system, for example, it can improve and present turn to and landing leg pressure regulating system, and the valve piece is many, the more complicated problem of system.
The utility model discloses an aim still includes, provides a hoist, and it can improve and present turn to and landing leg pressure regulating system, and the valve block is many, more complicated problem.
The embodiment of the utility model discloses a can realize like this:
the embodiment of the utility model provides a pressure regulating system, include:
a steering subsystem and a leg subsystem;
the general control subsystem comprises a controller, an oil supply pipeline, a general reversing valve and an electric proportional overflow valve, wherein the general reversing valve and the electric proportional overflow valve are arranged on the oil supply pipeline;
the main reversing valve is used for switching between a first state and a second state so as to enable the oil supply pipeline to supply oil to the steering subsystem when in the first state and supply oil to the supporting leg subsystem when in the second state;
the electric proportional overflow valve is used for adjusting the oil pressure in the oil supply pipeline, the electric proportional overflow valve is communicated with the controller, and the controller is used for adjusting the overflow oil pressure range of the electric proportional overflow valve.
In addition, the embodiment of the utility model provides a pressure regulating system can also have following additional technical characterstic:
optionally: when the oil supply pipeline independently supplies oil to the steering subsystem and the landing leg subsystem respectively, the overflow oil pressure ranges corresponding to the electric proportional overflow valve are different.
Optionally: the support leg subsystem comprises a horizontal oil cylinder subsystem and a vertical oil cylinder subsystem, and oil supply pipelines respectively and independently supply oil to the horizontal oil cylinder subsystem and the vertical oil cylinder subsystem.
Optionally: when the oil supply pipeline respectively and independently supplies oil to the horizontal oil cylinder subsystem and the vertical oil cylinder subsystem, the corresponding overflow oil pressure ranges of the electric proportional overflow valve are different.
Optionally: the main reversing valve is a two-position four-way valve which is used for switching between a left position and a right position;
when the two-position four-way valve is in the left position, the oil supply pipeline supplies oil to the support leg subsystem;
when the two-position four-way valve is in the right position, the oil supply pipeline supplies oil to the horizontal oil cylinder subsystem and the vertical oil cylinder subsystem.
Optionally: the main control subsystem also comprises an oil return pipeline, and the oil return pipeline respectively and independently returns oil to the steering subsystem and the support leg subsystem;
the oil inlet end of the electric proportional overflow valve is arranged on the oil supply pipeline, and the oil outlet end of the electric proportional overflow valve is arranged on the oil return pipeline.
Optionally: the master control subsystem also comprises a filter; the filter is arranged on the oil return pipeline.
Optionally: the master control subsystem also comprises a pressure sensor, and the pressure sensor is communicated with the controller;
the pressure sensor is arranged on the oil supply pipeline and used for detecting an oil pressure value in the oil supply pipeline, and the controller is used for receiving a real-time current value of the characteristic oil pressure value sent by the pressure sensor and carrying out fault judgment.
Optionally: the master control subsystem also comprises an alarm device, and the alarm device is communicated with the controller; the controller is used for controlling the alarm device to give an alarm when the real-time current value is larger than the preset current value.
The embodiment of the utility model also provides a hoist, the hoist includes the pressure regulating system.
The utility model discloses pressure regulating system and hoist's beneficial effect includes, for example:
in the pressure regulating system, the proportional overflow valve regulates the oil pressure in the oil supply pipeline to respectively regulate the oil pressure in the steering subsystem when the oil supply pipeline supplies oil to the steering subsystem, and the oil pressure in the support leg subsystem when the oil supply pipeline supplies oil to the support leg subsystem.
Compared with the pressure limiting valves which are respectively and correspondingly arranged for pressure limiting protection, the crane with the pressure regulating system reduces the number of valve blocks, and simplifies the structure of a steering and supporting leg pressure regulating system.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic diagram of a pressure regulating system according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a relationship between a calibration current and a voltage of the electric proportional relief valve provided in the embodiment of the present invention.
Icon: 10-a pressure regulating system; 100-a master control subsystem; 101-oil supply line; 102-return line; 110-a general directional control valve; 120-electric proportional relief valve; 130-a pressure sensor; 140-a filter; 150-oil tank; 160-an electronic pump; 200-a steering subsystem; 201-steering loop; 210-a priority valve; 300-a leg subsystem; 310-horizontal cylinder subsystem; 311-horizontal cylinder loop; 312-a first direction valve; 313-horizontal oil cylinder; 320-vertical cylinder subsystem; 321-vertical cylinder loop; 322-a second reversing valve; 323-vertical cylinder.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that, if the terms "upper", "lower", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the products of the present invention are used, the description is only for convenience of description and simplification, but the indication or suggestion that the indicated device or element must have a specific position, be constructed and operated in a specific orientation, and thus, should not be interpreted as a limitation of the present invention.
Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
In the crane, steering and supporting leg oil cylinders are distributed on a crane body to get on and off the crane body and share one oil source, but the actions of the landing leg for getting off the crane body, the running steering and the turning action for getting on the crane body are not overlapped, the overload protection of the supporting leg and the steering needs to be carried out pressure limiting respectively and independently, and the problems of more valve blocks and more complex pressure regulating system exist. In the prior art, the purpose of reducing the number of valve blocks is achieved mainly by simplifying the pipeline connection, but the problems of more valve blocks and more complex system still exist because the pressure limiting is still required to be carried out respectively and separately due to different working pressures of the lower landing leg, the driving steering and the upper turning. The pressure regulating system and the crane provided by the embodiment can improve the technical problem.
The embodiment of the utility model provides a crane, including pressure regulating system 10. For implementing step voltage regulation of the steering subsystem 200 and the leg subsystem 300.
The pressure regulating system 10 provided in the present embodiment is described in detail below with reference to fig. 1 to 2.
Referring to fig. 1, the voltage regulating system 10 provided in the present embodiment includes: a steering subsystem 200 and a leg subsystem 300; the general control subsystem 100, the general control subsystem 100 includes a controller (not shown in fig. 1), an oil supply pipeline 101, and a general directional control valve 110 and an electric proportional overflow valve 120 which are arranged in the oil supply pipeline 101, the oil supply pipeline 101 is used for supplying oil to the steering subsystem 200 and the leg subsystem 300 independently; the main reversing valve 110 is used for switching between a first state and a second state, so that the oil supply pipeline 101 supplies oil to the steering subsystem 200 when in the first state, and the oil supply pipeline 101 supplies oil to the support leg subsystem 300 when in the second state; the electric proportional relief valve 120 is used to adjust the oil pressure in the oil supply line 101, and the electric proportional relief valve 120 is in communication with a controller for adjusting the relief oil pressure range of the electric proportional relief valve 120.
In this embodiment, the steering subsystem 200 is used to implement the travel steering of the crane. The leg subsystem 300 is used to implement the telescoping of the legs. When the steering subsystem 200 and the leg subsystem 300 work, the working oil pressure thereof needs to be limited, and in this embodiment, the working oil pressure is adjusted by adjusting the overflow oil pressure range of the electric proportional overflow valve 120. Specifically, the controller calibrates the electric proportional relief valve 120, where the controller is in the prior art, and sends a preset current value to the proportional relief valve, and the electric proportional relief valve 120 adjusts the oil pressure of the oil line according to a preset relief oil pressure range corresponding to the preset current value. Specifically, in the master control subsystem 100, the oil supply loop is switched between the first state and the second state through the master reversing valve 110 to independently supply oil to the steering subsystem 200 and the leg subsystem 300 respectively, and meanwhile, when the master reversing valve 110 is in the first state and the second state, the calibrated electric proportional overflow valve 120 is used for independently adjusting the oil pressure of the steering subsystem 200 and the oil pressure of the leg subsystem 300 respectively, compared with the case that pressure limiting valves are correspondingly arranged for pressure adjustment respectively, in the embodiment, only one electric proportional overflow valve 120 is needed to be arranged, the number of valve blocks in the system is reduced, and the structure of the pressure adjusting system 10 is simplified.
Referring to fig. 1, in the embodiment, when the oil supply pipeline 101 independently supplies oil to the steering subsystem 200 and the leg subsystem 300, the overflow oil pressure ranges corresponding to the electric proportional overflow valve 120 are different. When the oil supply circuit supplies oil to the steering subsystem 200, the electric proportional relief valve 120 regulates the oil pressure in the oil supply line 101 within a first relief oil pressure range; when the oil supply pipeline 101 supplies oil to the support leg subsystem 300, the electric proportional overflow valve 120 adjusts the oil pressure of the oil supply pipeline 101 within a second overflow oil pressure range; the first spill oil pressure range is different from the second spill oil pressure range.
Specifically, with continued reference to fig. 1, the steering subsystem 200 includes a steering circuit 201 and a priority valve 210 disposed in the steering circuit 201. The priority valve 210 is mainly composed of a steering relief valve, a spring, a valve core, and a valve body. According to the working principle of the priority valve 210, the P port of the priority valve 210 is an oil inlet, the CF port is connected with an oil inlet of a steering gear, the EF port is connected with an oil inlet of a multi-way valve of a working system, the LS port is connected with a control port of the steering gear, and the T port is a safety valve oil return port.
Referring to fig. 1, in the present embodiment, the support leg subsystem 300 includes a horizontal cylinder subsystem 310 and a vertical cylinder subsystem 320, and the oil supply pipeline 101 supplies oil to the horizontal cylinder subsystem 310 and the vertical cylinder subsystem 320 independently. When the oil supply pipeline 101 independently supplies oil to the horizontal cylinder subsystem 310 and the vertical cylinder subsystem 320, the overflow oil pressure ranges corresponding to the electric proportional overflow valve 120 are different. The second overflow oil pressure range includes a horizontal oil pressure range and a vertical oil pressure range, and the electric proportional overflow valve 120 adjusts the oil pressure of the oil supply pipeline 101 in the horizontal oil pressure range when the oil supply pipeline 101 supplies oil to the horizontal cylinder subsystem 310; when the oil supply pipeline 101 supplies oil to the horizontal cylinder subsystem 310, the electric proportional relief valve 120 adjusts the oil pressure of the oil supply pipeline 101 within a vertical oil pressure range. The horizontal oil pressure range and the vertical oil pressure range may be the same or different, or may partially overlap. In this embodiment, the leg subsystem 300 adopts an H-shaped leg structure; or frog leg, X-leg or hinged leg configurations.
Specifically, with continued reference to fig. 1, the support leg subsystem 300 includes a horizontal cylinder circuit 311, and a first directional control valve 312 and a horizontal cylinder 313 disposed in the horizontal cylinder circuit 311. Specifically, the first directional valve 312 is a three-position four-way valve, and further, an O-shaped three-position four-way valve is used, and when the valve is in the middle position, each oil port is fully closed, and oil does not flow. The horizontal cylinder 313 is provided with a rodless chamber and a rod chamber. A rodless cavity of the horizontal oil cylinder 313 is communicated with a port B of the first reversing valve 312, a rod cavity of the horizontal oil cylinder 313 is communicated with a port A of the first reversing valve 312, DT2 is electrified, oil is fed into the rodless cavity of the horizontal oil cylinder 313, and the horizontal oil cylinder 313 extends out; DT4 is powered on, and the horizontal cylinder 313 retracts as oil enters the rod cavity of the horizontal cylinder 313. The "port B of the first direction valve 312" is a working oil port of the first direction valve 312, and the "port a of the first direction valve 312" is a working oil port of the first direction valve 312.
Specifically, the support leg subsystem 300 further includes a vertical cylinder loop 321, and a second direction valve 322 and a vertical cylinder 323 disposed on the vertical cylinder loop 321. Specifically, the second directional valve 322 adopts a three-position four-way valve, further, a Y-shaped three-position four-way valve is adopted, when the valve is in the middle position, the oil inlet P is closed, and the working oil port A, B is communicated with the oil return port T. Because the vertical oil cylinder 323 is provided with the hydraulic lock, the working oil port A, B is communicated with the oil return port T when the vertical oil cylinder 323 is in a middle position, and a rodless cavity of the vertical oil cylinder 323 is used for pressure relief and loop protection. The horizontal cylinder 313 is provided with a rodless chamber and a rod chamber. A rodless cavity of the vertical oil cylinder 323 is communicated with a port A of the second reversing valve 322, a rod cavity of the horizontal oil cylinder 313 is communicated with a port B of the second reversing valve 322, DT3 is electrified, oil is fed into the rod cavity of the vertical oil cylinder 323, and the vertical oil cylinder 323 retracts; the DT5 is electrified, the rodless cavity of the vertical oil cylinder 323 takes oil, and the vertical oil cylinder 323 extends out. The "port a of the second direction valve 322" is a working oil port of the second direction valve 322, and the "port B of the second direction valve 322" is a working oil port of the second direction valve 322.
Specifically, the horizontal cylinder circuit 311 and the vertical cylinder circuit 321 are connected in parallel, and form a first parallel port and a second parallel port. The master control subsystem 100 supplies oil to the horizontal cylinder loop 311 and the vertical cylinder loop 321 through the first parallel port and the second parallel port.
Referring to fig. 1, in the present embodiment, the general reversing valve 110 is a two-position four-way valve, and the two-position four-way valve is used for switching between a left position and a right position; when the two-position four-way valve is in the left position, the oil supply pipeline 101 supplies oil to the support leg subsystem 300; when the two-position four-way valve is in the right position, the oil supply pipeline 101 supplies oil to the horizontal cylinder subsystem 310 and the vertical cylinder subsystem 320.
Referring to fig. 1, specifically, the port a of the main directional valve 110 is communicated with the port P of the priority valve 210, the port B (working oil port) of the main directional valve 110 is communicated with the first parallel port, the port P (oil inlet) of the main directional valve 110 is communicated with the oil tank 150, and the port T of the main directional valve 110 is communicated with the second parallel port. The main reversing valve 110 is in a left position (a state shown in the figure), a port P of the main reversing valve 110 is communicated with a port A, the oil tank 150 supplies oil to the steering subsystem 200, meanwhile, a port B of the main reversing valve 110 is communicated with a port T, and oil of the support leg subsystem 300 does not flow; the main reversing valve 110 is in the right position (DT 1 in the figure is electrified), the port P of the main reversing valve 110 is communicated with the port T, the oil tank 150 supplies oil to the support leg subsystem 300, the port A of the main reversing valve 110 is communicated with the port T, and oil of the steering subsystem 200 is not communicated.
Referring to fig. 1, in the present embodiment, the general control subsystem 100 further includes an oil return pipeline 102, and the oil return pipeline 102 independently returns oil to the steering subsystem 200 and the leg subsystem 300, respectively. Specifically, the second parallel port communicates with the oil return line 102 to return oil through the oil return line 102. The oil inlet end of the electric proportional relief valve 120 is arranged on the oil supply pipeline 101, and the oil outlet end of the electric proportional relief valve 120 is arranged on the oil return pipeline 102. When the steering subsystem 200 and the leg subsystem 300 are both closed and the electronic pump 160 is turned on, the electric proportional relief valve 120 returns oil through the oil return pipeline 102; when any one of the steering subsystem 200 and the leg subsystem 300 is opened, the electric proportional relief valve 120 returns oil through the oil return pipeline 102, so that the oil pressure of the steering subsystem 200 and the leg subsystem 300 is adjusted.
Referring to fig. 1, in the present embodiment, the general control subsystem 100 further includes a filter 140; the filter 140 is disposed on the oil return line 102. The oil filter is used for filtering oil returned through the oil return pipeline 102, and impurities in the oil are prevented from flowing back to the oil tank 150 through the oil return pipeline 102.
Referring to fig. 1, in the present embodiment, the general control subsystem 100 further includes a pressure sensor 130, and the pressure sensor 130 is in communication with the controller; the pressure sensor 130 is disposed in the oil supply line 101 and configured to detect an oil pressure value in the oil supply line 101, and the controller is configured to receive a real-time current value representing the oil pressure value sent by the pressure sensor 130 and perform fault determination. The "controller performs fault judgment" means that the controller sends a fault signal or a non-fault signal after receiving the real-time current value sent by the pressure sensor 130.
Specifically, the horizontal oil cylinder 313 is thin, a customer can bend easily due to misoperation, the current interval corresponding to the pressure of the electric proportional overflow valve 120 is 400mA-600mA, the pressure sensor 130 gives an alarm in the current interval to remind the customer, and when the pressure corresponding to 600mA is exceeded, the controller controls the two-position four-way valve to lose power, and the horizontal support leg stops acting. Has the effect of protecting the horizontal cylinder subsystem 310.
Referring to fig. 1, in this embodiment, the general control subsystem 100 further includes an alarm device, and the alarm device is in communication with the controller; the controller is used for controlling the alarm device to give an alarm when the real-time current value is larger than a preset current value. The preset current value can be a value or can be expanded to a value range, when the real-time current value is larger than the preset current value, the oil pressure in the oil path is beyond the regulation range of the electric proportional overflow valve 120, and at the moment, the controller controls the alarm device to give an alarm; when the real-time current value is smaller than the preset current value, the oil pressure in the oil way is within the regulation range of the electric proportional overflow valve 120, the oil pressure in the oil way is within the safety range, at the moment, the alarm device does not give an alarm, and the oil way works normally. Similarly, when the real-time current value is larger than the maximum value of the preset current value range, the oil pressure in the oil path exceeds the regulation range of the electric proportional overflow valve 120, and at the moment, the controller controls the alarm device to give an alarm; similarly, when the real-time current value falls within the preset current value range, the oil pressure in the oil path is within the regulation range of the electric proportional overflow valve 120, the oil pressure in the oil path is within the safety range, at this time, the alarm device does not give an alarm, and the oil path normally works.
With reference to fig. 1, in this embodiment, through the power-on sequential logic of the main directional control valve 110, the priority valve 210, the first directional control valve 312, and the second directional control valve 322, the proportional relief valve is preset through intelligent pressure-step pressure regulation by program current, and the maximum pressure of the system is regulated within the relief oil pressure range by inputting a preset current value. The oil tank 150 supplies oil to the steering subsystem 200 or the leg subsystem 300 through the oil supply pipeline 101, and the proportional relief valve adjusts the oil pressure of the oil supply pipeline 101, so that the oil pressure of the steering subsystem 200 or the leg subsystem 300 is adjusted.
Referring now to fig. 1, a pressure regulation process of the pressure regulation system 10 is described in detail.
(1) Steering of the steering subsystem 200: the steering comprises left steering and right steering, the electromagnet DT1 is not electrified, the main reversing valve 110 is in the state shown in figure 1, the preset current value of the proportional overflow valve is correspondingly set to be a first preset value, and correspondingly, the pressure regulating range of the proportional overflow valve is a first overflow oil pressure range.
The controller controls the main reversing valve 110 to be in a left position, the pressure oil source supplies oil from the left position of the main reversing valve 110 to the P port of the priority valve 210, meanwhile, the controller calibrates the current value of the electric proportional overflow valve 120 to be a first preset value, and the overflow oil pressure value of the proportional overflow valve is a first oil pressure value; specifically, the first predetermined value may be expanded to a first predetermined range, and correspondingly, the first oil pressure value is expanded to a first oil pressure range, during which the oil pressure of the steering subsystem 200 is controlled. Wherein the first oil pressure value and the first oil pressure range are both within the first spill oil pressure range.
(2) Horizontal cylinder 313 extends: the electromagnet DT1 is electrified, the electromagnet DT2 is electrified, and the preset current value of the proportional relief valve is correspondingly set to be a second preset value; correspondingly, the pressure regulating range of the proportional overflow valve is a horizontal oil pressure range.
The controller controls the general reversing valve 110-DT1 to be electrified, the electromagnetic block DT2 of the first reversing valve 312 to be electrified, the pressure oil source supplies oil to the rodless cavity of the horizontal oil cylinder 313 from the right position of the general reversing valve 110 and the first reversing valve 312, meanwhile, the controller calibrates the current value of the input electric proportional overflow valve 120 to be a second preset value, and the overflow oil pressure value of the proportional overflow valve is a second oil pressure value; specifically, the second preset value may be expanded to a second preset value range, and correspondingly, the second oil pressure value is expanded to a second oil pressure value range, in which the oil pressure of the horizontal cylinder subsystem 310 is controlled. Wherein the second oil pressure value and the second oil pressure range are both within the horizontal oil pressure range.
(3) And horizontal oil cylinder 313 shrinkage: the electromagnet DT1 is electrified, the electromagnet DT4 is electrified, and the preset current value of the proportional relief valve is correspondingly set to be a second preset value; correspondingly, the pressure regulating range of the proportional overflow valve is a horizontal oil pressure range.
The controller controls the general reversing valve 110-DT1 to be electrified, the electromagnetic block DT4 of the first reversing valve 312 to be electrified, the pressure oil source supplies oil to the rod cavity of the horizontal oil cylinder 313 from the right position of the general reversing valve 110 and the first reversing valve 312, meanwhile, the controller calibrates the current value of the input electric proportional overflow valve 120 to be a second preset value, and the overflow oil pressure value of the proportional overflow valve is a second oil pressure value; specifically, the second preset value may be expanded to a second preset value range, and correspondingly, the second oil pressure value is expanded to a second oil pressure value range, in which the oil pressure of the horizontal cylinder subsystem 310 is controlled. Wherein the second oil pressure value and the second oil pressure range are both within the horizontal oil pressure range.
(4) And a vertical oil cylinder 323 extends: the electromagnet DT1 is electrified, the electromagnet DT3 is electrified, and the preset current value of the proportional relief valve is correspondingly set to be a third preset value; correspondingly, the pressure regulating range of the proportional overflow valve is a vertical oil pressure range.
The controller controls the general reversing valve 110-DT1 to be electrified, the electromagnetic block DT3 of the first reversing valve 312 to be electrified, the pressure oil source supplies oil to the rodless cavity of the horizontal oil cylinder 313 from the right position of the general reversing valve 110 and the second reversing valve 322, meanwhile, the controller calibrates the current value of the input electric proportional overflow valve 120 to be a third preset value, and the overflow oil pressure value of the proportional overflow valve is a third oil pressure value; specifically, the third predetermined value may be expanded to a third predetermined range, and correspondingly, the third oil pressure value is expanded to a third oil pressure range, where the oil pressure of the vertical cylinder subsystem 320 is controlled. Wherein the third oil pressure value and the third oil pressure range are both within the vertical oil pressure range.
(5) And a vertical oil cylinder 323 contracts: the electromagnet DT1 is electrified, the electromagnet DT5 is electrified, and the preset current value of the proportional relief valve is correspondingly set to be a third preset value. Correspondingly, the pressure regulating range of the proportional overflow valve is a vertical oil pressure range.
The controller controls the general reversing valve 110-DT1 to be electrified, the electromagnetic block DT5 of the first reversing valve 312 to be electrified, the pressure oil source supplies oil to the rod cavity of the horizontal oil cylinder 313 from the right position of the general reversing valve 110 and the second reversing valve 322, meanwhile, the controller calibrates the current value of the input electric proportional overflow valve 120 to be a third preset value, and the overflow oil pressure value of the proportional overflow valve is a third oil pressure value; specifically, the third predetermined value may be expanded to a third predetermined range, and correspondingly, the third oil pressure value is expanded to a third oil pressure range, where the oil pressure of the vertical cylinder subsystem 320 is controlled. Wherein the third oil pressure value and the third oil pressure range are both within the vertical oil pressure range.
Referring to fig. 2, in the present embodiment, the first preset value, the second preset value and the third preset value fall on a line labeled 1 in fig. 2; or together fall on the line numbered 2; or collectively fall on the line labeled 3.
The embodiment of the utility model provides a pressure regulating method is still provided, uses pressure regulating system 10, include: when the oil supply line 101 supplies oil to the steering subsystem 200, the electric proportional relief valve 120 regulates the oil pressure of the oil supply line 101 within a first relief oil pressure range; when the oil supply line 101 supplies oil to the leg subsystem 300, the electric proportional relief valve 120 regulates the oil pressure of the oil supply line 101 within a second relief oil pressure range.
Optionally: the first spill oil pressure range is different from the second spill oil pressure range.
Optionally: the pressure regulating system 10 further comprises a pressure sensor 130 and an alarm device, wherein the pressure sensor 130 is arranged on the oil supply pipeline 101 and is communicated with the controller, and the alarm device is communicated with the controller; the voltage regulating method also comprises the following steps: the controller receives a real-time current value which is sent by the pressure sensor 130 and represents the oil pressure in the oil supply pipeline 101, and controls the alarm device to give an alarm when the real-time current value is larger than a preset current value. Specifically, the alarm device may employ a buzzer or an alarm lamp.
The voltage regulation system 10 provided by the embodiment at least has the following advantages:
the steering subsystem 200 and the support leg subsystem 300 share one pump source, the oil supply pipelines 101 are respectively and independently used for supplying oil to the steering subsystem 200 and the support leg subsystem 300 through the main reversing valve 110, the oil pressure of the steering subsystem 200 and the oil pressure of the support leg subsystem 300 are regulated and controlled through the electric proportional overflow valve 120, the arrangement of valve blocks is reduced, and the system is simplified.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A pressure regulating system, comprising:
a steering subsystem (200) and a leg subsystem (300);
the general control subsystem (100) comprises a controller, an oil supply pipeline (101), a general reversing valve (110) arranged on the oil supply pipeline (101), and an electric proportional overflow valve (120), wherein the oil supply pipeline (101) is used for supplying oil to the steering subsystem (200) and the support leg subsystem (300) independently;
the main reversing valve (110) is used for switching between a first state and a second state, so that the oil supply pipeline (101) supplies oil to the steering subsystem (200) when in the first state, and the oil supply pipeline (101) supplies oil to the support leg subsystem (300) when in the second state;
the electric proportional overflow valve (120) is used for adjusting the oil pressure in the oil supply pipeline (101), the electric proportional overflow valve (120) is communicated with the controller, and the controller is used for adjusting the overflow oil pressure range of the electric proportional overflow valve (120).
2. The pressure regulating system of claim 1, wherein:
when the oil supply pipeline (101) respectively supplies oil to the steering subsystem (200) and the support leg subsystem (300) independently, the overflow oil pressure ranges corresponding to the electric proportional overflow valve (120) are different.
3. The pressure regulating system of claim 2, wherein:
the supporting leg subsystem (300) comprises a horizontal oil cylinder subsystem (310) and a vertical oil cylinder subsystem (320), and the oil supply pipelines (101) respectively and independently supply oil to the horizontal oil cylinder subsystem (310) and the vertical oil cylinder subsystem (320).
4. The pressure regulating system of claim 3, wherein:
when the oil supply pipeline (101) respectively supplies oil to the horizontal oil cylinder subsystem (310) and the vertical oil cylinder subsystem (320) independently, the overflow oil pressure ranges corresponding to the electric proportional overflow valve (120) are different.
5. The pressure regulating system of claim 4, wherein:
the general reversing valve (110) is a two-position four-way valve, and the two-position four-way valve is used for switching between a left position and a right position;
when the two-position four-way valve is in the left position, the oil supply pipeline (101) supplies oil to the support leg subsystem (300);
when the two-position four-way valve is in the right position, the oil supply pipeline (101) supplies oil to the horizontal oil cylinder subsystem (310) and the vertical oil cylinder subsystem (320).
6. The pressure regulating system according to any one of claims 1 to 5, wherein:
the master control subsystem (100) further comprises an oil return pipeline (102), and the oil return pipeline (102) respectively and independently returns oil to the steering subsystem (200) and the support leg subsystem (300);
the oil inlet end of the electric proportional overflow valve (120) is arranged on the oil supply pipeline (101), and the oil outlet end of the electric proportional overflow valve (120) is arranged on the oil return pipeline (102).
7. The pressure regulating system of claim 6, wherein:
the master control subsystem (100) further comprises a filter (140); the filter (140) is arranged on the oil return pipeline (102).
8. The pressure regulating system according to any one of claims 1 to 5, wherein:
the turnkey subsystem (100) further comprising a pressure sensor (130), the pressure sensor (130) in communication with the controller;
the pressure sensor (130) is arranged in the oil supply pipeline (101) and used for detecting an oil pressure value in the oil supply pipeline (101), and the controller is used for receiving a representation sent by the pressure sensor (130) and carrying out fault judgment on a real-time current value of the oil pressure value.
9. The pressure regulating system of claim 8, wherein:
the master control subsystem (100) further comprises an alarm device, and the alarm device is communicated with the controller;
the controller is used for controlling the alarm device to give an alarm when the real-time current value is larger than a preset current value.
10. A crane, characterized by:
the crane includes a pressure regulating system as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921674091.1U CN210528290U (en) | 2019-10-08 | 2019-10-08 | Pressure regulating system and crane |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921674091.1U CN210528290U (en) | 2019-10-08 | 2019-10-08 | Pressure regulating system and crane |
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| CN210528290U true CN210528290U (en) | 2020-05-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110550552A (en) * | 2019-10-08 | 2019-12-10 | 三一汽车起重机械有限公司 | Pressure regulating system, crane and pressure regulating method |
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2019
- 2019-10-08 CN CN201921674091.1U patent/CN210528290U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110550552A (en) * | 2019-10-08 | 2019-12-10 | 三一汽车起重机械有限公司 | Pressure regulating system, crane and pressure regulating method |
| CN110550552B (en) * | 2019-10-08 | 2024-08-02 | 三一汽车起重机械有限公司 | Pressure regulating system, crane and pressure regulating method |
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