CN213981423U - Hydraulic control system for lifting oil cylinder of belt press working machine - Google Patents
Hydraulic control system for lifting oil cylinder of belt press working machine Download PDFInfo
- Publication number
- CN213981423U CN213981423U CN202022982716.XU CN202022982716U CN213981423U CN 213981423 U CN213981423 U CN 213981423U CN 202022982716 U CN202022982716 U CN 202022982716U CN 213981423 U CN213981423 U CN 213981423U
- Authority
- CN
- China
- Prior art keywords
- valve
- differential
- port
- pressure
- oil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000003921 oil Substances 0.000 claims abstract description 136
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 40
- 230000001174 ascending effect Effects 0.000 claims abstract description 29
- 230000001105 regulatory effect Effects 0.000 claims abstract description 28
- 230000001276 controlling effect Effects 0.000 claims description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 239000000758 substrate Substances 0.000 claims description 9
- 230000008859 change Effects 0.000 claims description 6
- 230000000630 rising effect Effects 0.000 claims description 5
- 239000013589 supplement Substances 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Images
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
The utility model provides a pressure operation machine lift cylinder hydraulic control system, include: the hydraulic control system comprises a main reversing valve, a descending brake valve, an ascending brake differential valve, a lifting oil cylinder, a pilot handle, a remote pressure regulating valve, a differential selection valve and a pressure reducing valve, wherein the hydraulic oil tank is connected with a hydraulic pump, the hydraulic pump is connected with the main reversing valve and the pressure reducing valve, the pressure reducing valve is connected with the pilot handle and the differential selection valve, the pilot handle is connected with the main reversing valve, the main reversing valve is connected with the descending brake valve and the ascending brake differential valve, the descending brake valve and the ascending brake differential valve are connected with the lifting oil cylinder, the main reversing valve and the ascending brake differential valve are connected with the hydraulic oil tank, the differential selection valve is connected with the ascending brake differential valve, and the remote pressure regulating valve is connected with the main reversing valve. The utility model provides a take pressure operation machine lift cylinder hydraulic control system, this system cost is low, the shelf life is shorter, has multiple functions such as switching-over, braking, differential and pressure regulation, and it is lower to maintain the warranty cost.
Description
Technical Field
The utility model relates to a hydraulic control technical field especially relates to an operation machine lift cylinder hydraulic control system is pressed in area.
Background
The pressurized operation machine is a new type of well repairing equipment, specially used for taking off and running off tubular column operation under the condition of pressure in oil casing annulus in oil, water and gas well. In order to improve the recovery ratio of oil, water and gas wells and protect underground oil and gas resources and environment to the maximum extent. The large-scale popularization of the operation machine with pressure in each large oil field is realized.
The hydraulic control system of the lifting oil cylinder of the under-pressure operation machine is used for controlling the functions of reversing, braking, differential motion, pressure regulation and the like of the lifting oil cylinder, and is a core system of the under-pressure operation machine. The system is formed by connecting 7 hydraulic control valves through hydraulic pipelines. The hydraulic control system of each large oil field is required to control the lifting oil cylinder to efficiently, quickly and stably move under various extreme well conditions under various complex well conditions.
At present, the flow of a hydraulic control system of a lifting oil cylinder of a domestic operation machine with pressure is small, so that the speed of the oil cylinder is low, the function is incomplete, and the requirements of various extreme well conditions and operation efficiency cannot be met. The imported oil cylinder control system has high cost and long shelf life, so that the design of a hydraulic control system of the lifting oil cylinder of the belt press working machine, which has reasonable cost, large flow and complete functions and is suitable for various complex well conditions in China, is necessary.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a pressure operation machine lift cylinder hydraulic control system, this system cost is low, the shelf life is shorter, has multiple functions such as switching-over, braking, differential and pressure regulation, and it is lower to maintain the warranty cost, applicable in various complicated well conditions.
In order to achieve the above object, the utility model provides a following scheme:
a hydraulic control system for a lift cylinder of a press working machine, the system comprising: the hydraulic control system comprises a hydraulic oil tank, a hydraulic pump, a main directional valve, a descending brake valve, an ascending brake differential valve, a lifting oil cylinder, a pilot handle, a remote pressure regulating valve, a differential selection valve and a pressure reducing valve, wherein the hydraulic oil tank is connected with the hydraulic pump which is connected with the main directional valve and the pressure reducing valve;
the pilot handle is connected with the main reversing valve and used for controlling the opening degree of the main reversing valve, an A port of the main reversing valve is connected with the ascending brake differential valve, the ascending brake differential valve is connected to a rod cavity of the lifting oil cylinder, a B port of the main reversing valve is connected with the descending brake valve, and the descending brake valve is connected to a rodless cavity of the lifting oil cylinder; a T oil port of the main reversing valve is connected to the hydraulic oil tank;
the differential selection valve is connected with the ascending braking differential valve, and the remote pressure regulating valve is connected with the main reversing valve.
Optionally, the port a of the main directional control valve includes a port a1 and a port a2, the port a1 and the port a2 are both connected to the ascending braking differential valve, the port B of the main directional control valve includes a port B1 and a port B2, the port B1 and the port B2 are both connected to the descending braking valve, the port T of the main directional control valve includes a port T1 and a port T2, the port T1 and the port T2 are both connected to the hydraulic oil tank, the ports a1 and a2 of the main directional control valve are connected to the port a of the pilot handle, and the ports B1 and B2 of the main directional control valve are connected to the port B of the pilot handle.
Optionally, the pilot handle is a spring automatic-resetting pilot handle, the opening degree of the pilot handle is in a linear relationship with the output pressure, the larger the opening degree is, the larger the output pressure is, the larger the opening degree of a valve core of the main directional control valve is, the larger the oil passing amount is, a pressure control section of the pilot handle corresponds to a pilot pressure section of the main directional control valve, and is used for realizing stepless speed regulation of the lift cylinder through the pilot handle.
Optionally, the main directional control valve is formed by connecting a plurality of working pieces in parallel, the working pieces are large-flow load-sensitive directional control valves with a flow rate of 450L/min, the main directional control valve is open-center oil inlet, hydraulic control proportional reversing, and low-pressure unloading of a pump when the system is inactive and standby, the oil inlet of the main directional control valve is connected with an overflow valve for overflowing redundant hydraulic oil back to the hydraulic oil tank when the oil passing amount is small, the ports a1, a2, B1 and B2 of the main directional control valve are also provided with overflow valves for reducing pressure impact and working condition oil supply of the lift cylinder, and the main directional control valve is internally provided with a pilot overflow valve for matching with the remote pressure regulating valve to regulate the working pressure of the lift cylinder.
Optionally, the remote pressure regulating valve is a cartridge valve, and includes a valve block and a remote pressure regulating valve core, and is used for remotely regulating the pilot overflow valve of the main directional valve and controlling the working pressure of the lift cylinder, and the remote pressure regulating valve is connected to the LS1 port or the LS2 port of the main directional valve.
Optionally, an oil outlet of the pressure reducing valve is connected in parallel with a buffer accumulator for ensuring timely and stable oil supply.
Optionally, the descending brake valve is a cartridge valve, and includes a valve block and a plurality of balance valve cores, the balance valve cores are connected in parallel, and the flow rate of the descending brake valve is matched with the flow rate of the rodless cavity of the lift cylinder, so as to balance and control the hydraulic oil in the lift cylinder, and prevent overspeed runaway caused by extreme heavy load during descending.
Optionally, the differential valve for lift braking is a cartridge valve, and includes a valve block, a plurality of balanced valve spools and a plurality of differential control valve spools, where the flow rate of the differential valve for lift braking matches the flow rate of the rod cavity of the lift cylinder, the balanced valve spools are connected in parallel, and are used to implement the lift braking function of the lift cylinder and prevent the runaway of overspeed caused by extreme light load during lift, the differential control valve spool includes a first differential valve spool, a second differential valve spool, a third differential valve spool and a fourth differential valve spool, and is used to implement the lift differential function of the lift cylinder, the first differential valve spool is connected to the differential selector valve, when the differential selector valve is not supplying oil, the pressure of the lift cylinder acts on the balanced valve spools, the differential control valve spool is not acting, when the differential selector valve supplies oil, the first differential valve spool is pushed to change direction, and when the differential selector valve supplies oil, the pressure of the rodless cavity of the lift cylinder pushes the second differential valve spool to change direction, the fourth differential valve core controls hydraulic oil to flow back to the hydraulic oil tank, and a P1 oil port and a P2 oil port of the fourth differential valve are connected, so that a rod cavity and a rodless cavity of the lifting oil cylinder are communicated.
Optionally, the differential selection valve is a cartridge valve, and includes a valve block and a two-position two-way reversing valve, and the differential selection valve is connected to the ascending braking differential valve and is used for controlling the opening and closing of the ascending differential function.
Optionally, the system further comprises an upper air operating platform, a platform substrate and a large-flow steel pipe, the lifting oil cylinder is suspended and fixed on the platform substrate, the main reversing valve is connected with the descending brake valve and the ascending brake differential valve through the large-flow steel pipe, the descending brake valve and the ascending brake differential valve are connected with the lifting oil cylinder through the large-flow steel pipe, the pressure reducing valve, the differential selection valve, the remote pressure regulating valve and the pilot handle are all arranged on the upper air operating platform, and the upper air operating platform is fixed on one side of the platform substrate and used for enabling a worker to operate conveniently.
According to the utility model provides a concrete embodiment, the utility model discloses a following technological effect: the hydraulic control system of the lifting oil cylinder of the under-pressure operation machine has the advantages of low manufacturing cost, short shelf life, functions of reversing, braking, differential motion, pressure regulation and the like, low maintenance cost and suitability for various complex well conditions; the main reversing valve adopts a multi-piece structure, the number of the working pieces can be configured according to the flow of the system, and the requirements of various types of pressurized operation machines are met; the reversing of the lifting oil cylinder is controlled by adopting a pilot handle, so that the field operation is facilitated; the working pressure of the lifting oil cylinder is adjusted by adopting a remote pressure adjusting loop, and the lifting oil cylinder is provided with a pilot overflow valve and a remote pressure adjusting valve, so that the working pressure of the lifting oil cylinder can be adjusted quickly, conveniently and accurately; the pressure reducing valve is connected with a buffer accumulator in parallel, so that a reversing main valve can be accurately and quickly controlled; the lifting oil cylinder is provided with a descending brake valve, so that the braking force can be adjusted according to the operation requirement to ensure the controllable and stable work of the lifting oil cylinder under extreme load; the lifting brake differential valve is arranged, so that when the load is small or no load exists, the lifting speed can be increased, and the working efficiency is improved; a differential selection valve is adopted to realize the opening and closing of the lifting differential function of the lifting oil cylinder; various valves all adopt cartridge valve structures, and the maintenance cost is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic structural diagram of a hydraulic control system of a lifting cylinder of a belt pressing operation machine according to an embodiment of the present invention;
fig. 2 is the utility model discloses a belt press operation machine lift cylinder hydraulic control system principle schematic diagram.
Reference numerals: 1. a lowering brake valve; 2. a main directional control valve; 3. a lift brake differential valve; 4. a lift cylinder; 5. a pressure reducing valve; 6. a differential selection valve; 7. a remote pressure regulating valve; 8. a pilot handle; 9. an overhead operation platform; 10. a balanced valve core; 11. a hydraulic pump; 12. a hydraulic oil tank; 13. a large-flow steel pipe; 201. a pilot overflow valve; 301. a first differential spool; 302 a second differential spool; 303. a third differential spool; 304. a fourth differential spool.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model aims at providing a pressure operation machine lift cylinder hydraulic control system, this system cost is low, the shelf life is shorter, has multiple functions such as switching-over, braking, differential and pressure regulation, and it is lower to maintain the warranty cost, applicable in various complicated well conditions.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
As shown in fig. 1-2, the embodiment of the utility model provides a take area to press workover rig lift cylinder hydraulic control system includes: the hydraulic control system comprises a hydraulic oil tank 12, a hydraulic pump 11, a main reversing valve 2, a descending brake valve 1, an ascending brake differential valve 3, a lifting oil cylinder 4, a pilot handle 8, a remote pressure regulating valve 7, a differential selection valve 6 and a pressure reducing valve 5, wherein the hydraulic oil tank 12 is connected with the hydraulic pump 11, the hydraulic pump 11 is connected with the main reversing valve 2 and the pressure reducing valve 5, the hydraulic pump 11 is used for supplying oil to the main reversing valve 2 and the pressure reducing valve 5, the pressure reducing valve 5 is connected with the pilot handle 8 and the differential selection valve 6, and the hydraulic oil pump 11 supplies oil to the pressure reducing valve 5 and supplies oil to the pilot handle 8 and the differential selection valve 6 after being subjected to pressure regulation through the pressure reducing valve 5;
the pilot handle 8 is connected with the main directional control valve 2, the pilot handle 8 is used for controlling the opening degree of the main directional control valve 2, the port A of the main directional control valve 2 is connected with the ascending brake differential valve 3, the ascending brake differential valve 3 is connected with the rod cavity of the lifting oil cylinder 4, the port B of the main directional control valve 2 is connected with the descending brake valve 1, and the descending brake valve 1 is connected with the rodless cavity of the lifting oil cylinder 4; the T oil port of the main reversing valve 2 is connected to the hydraulic oil tank 12;
the differential selector valve 6 is connected to the rising braking differential valve 3, and the remote pressure regulating valve 7 is connected to the main directional control valve 2.
The port A of the main reversing valve 2 comprises a port A1 and a port A2, the port A1 and the port A2 are connected with the ascending braking differential valve 3, the port B of the main reversing valve 2 comprises a port B1 and a port B2, the port B1 and the port B2 are connected with the descending braking valve 1, the port T of the main reversing valve 2 comprises a port T1 and a port T2, the port T1 and the port T2 are connected with the hydraulic oil tank 12, the ports a1 and a2 of the main reversing valve 2 are connected with the port a of the pilot handle 8, and the ports B1 and B2 of the main reversing valve 2 are connected with the port B of the pilot handle 8.
The pilot handle 8 is of a spring automatic reset structure, the pilot handle 8 is arranged on the high-altitude operating platform 9, is used for controlling the opening degree of the valve core of the main reversing valve 2 to ensure that the oil passing amount of the valve core of the main reversing valve 2 is different, the opening degree of the pilot handle and the output pressure are in a linear relation, the larger the opening degree is, the larger the output pressure is, the larger the opening degree of the valve core of the main reversing valve is, the larger the oil passing amount is, the pressure control section of the pilot handle 8 corresponds to the pilot pressure section of the main reversing valve 2, stepless speed regulation of the lifting oil cylinder 4 can be realized through the pilot handle 8, when oil is supplied to the port b of the pilot handle 8, the main reversing valve 2 controls the lifting oil cylinder 4 to ascend, when oil is supplied to the port a of the pilot handle 8, the main directional control valve 2 controls the lifting oil cylinder 4 to descend, and the port L of the pilot handle 8 is connected with the hydraulic oil tank 12.
The main reversing valve 2 is of a multi-plate structure and is formed by connecting a plurality of working plates in parallel, the working plates are mature high-flow load-sensitive reversing valves with high utilization rate, the flow rate of the working plates is 450L/min, the number of the working plates is determined according to the speed requirement of a pressurized working machine so as to achieve the expected lifting speed, the positions and the sizes of oil ports of the head piece and the tail piece are determined according to the layout of a system pipeline so as to facilitate the connection of pipelines, the main reversing valve is open-core oil inlet, hydraulic control proportional reversing, and low-pressure unloading of a pump when the system is in a non-action standby state, an overflow valve is connected with the oil inlet of the main reversing valve 2, when the oil passing amount of a valve core of the main reversing valve 2 is small, redundant hydraulic oil flows back to the hydraulic oil tank 12 through the overflow valve, and the A1 port, the A2 port, the B1 port and the B2 port of the main reversing valve 2 are also provided with overflow valves for reducing the pressure impact of the lifting oil cylinder 4 and the working condition oil supplement, a pilot overflow valve 201 is arranged in the main reversing valve 2 and is used for being matched with the remote pressure regulating valve 7 to regulate the working pressure of the lifting oil cylinder 4; supplying oil to ports b1 and b2 to push the main reversing valve 2 to reverse, so that hydraulic oil is supplied to a rodless cavity of the lifting oil cylinder 4, and the lifting oil cylinder 4 rises; the oil supply to the ports a1 and a2 pushes the main reversing valve 2 to reverse, so that the hydraulic oil is supplied to the rod cavity of the lifting oil cylinder 4, and the lifting oil cylinder 4 descends.
The remote pressure regulating valve 7 is a cartridge valve and comprises a valve block and a remote pressure regulating valve core and is used for remotely regulating the pilot overflow valve 201 of the main reversing valve 2 and controlling the working pressure of the lifting oil cylinder 4, the remote pressure regulating valve 7 is connected with an LS1 port or an LS2 port of the main reversing valve 2, taking fig. 2 as an example, the remote pressure regulating valve 7 is connected with an LS2 port of the main reversing valve 2 and remotely controls the valve core of the pilot overflow valve 201, and therefore the working pressure of the lifting oil cylinder 4 is controlled.
The pressure reducing valve 5 is used for adjusting hydraulic oil to a proper pressure and then supplying oil to the differential selection valve 6 and the pilot handle 8, and an oil outlet of the pressure reducing valve 5 is connected with a buffer energy accumulator in parallel and used for ensuring the stability of oil supply and reducing the control response time of the pilot handle 8.
The descending brake valve 1 is a cartridge valve and comprises a valve block and a plurality of balance valve cores 10, the balance valve cores 10 are connected in parallel, a T3 oil port of the descending brake valve 1 is connected with the hydraulic oil tank 12, the flow of the descending brake valve 1 is matched with the flow of a rodless cavity of the lifting oil cylinder 4 and used for balancing and controlling hydraulic oil in the lifting oil cylinder 4, overspeed runaway caused by extreme heavy load during descending is prevented, when the lifting oil cylinder 4 descends, the opening pressure of the descending brake valve 1 is derived from pilot oil pressure and rodless cavity oil return back pressure provided by a rod cavity of the lifting oil cylinder 4, when the pressure established by the rod cavity and the rodless cavity reaches the opening pressure of the balance valve cores 10, the descending brake valve 1 is opened, an oil return channel is established by the rodless cavity of the lifting oil cylinder 4, and controllable and stable descending of the lifting oil cylinder 4 is guaranteed, the opening pressure of the balanced valve core 10 can be adjusted according to different well conditions.
The lifting braking differential valve 3 is a cartridge valve and comprises a valve block, a plurality of balance valve cores 10 and a plurality of differential control valve cores, the L oil port of the lifting brake differential valve 3 is connected with the hydraulic oil tank 12, the flow of the balance valve cores 10 is matched with the flow of the rod cavity of the lifting oil cylinder 4, is used for realizing the ascending brake function and the differential function, and the ascending brake function is realized in the process that when the lifting oil cylinder 4 ascends, the opening pressure of the balance valve core 10 is derived from the pilot oil pressure provided by the rodless cavity and the return oil back pressure of the rod cavity, when the pressure established by the rodless cavity and the rod cavity reaches the opening pressure of the balance valve core 10, the balance valve core 10 is opened, the rod cavity of the lifting oil cylinder 4 establishes an oil return channel, thereby ensuring that the lifting oil cylinder descends controllably and stably, and the opening pressure of the balance valve core 10 can be adjusted according to different well conditions.
The differential function is realized by the process that the differential control valve core comprises a first differential valve core 301, a second differential valve core 302, a third differential valve core 303 and a fourth differential valve core 304, when the X port of the first differential valve core 301, namely the differential selection valve 6 is not supplied with oil, the rodless cavity pressure (rising oil pressure) of the lifting oil cylinder 4 directly acts on the balance valve core 10, the differential control valve core does not work, the rising differential function is closed, when the X port is supplied with oil, the first differential valve core 301 is pushed to change direction, the rodless cavity pressure (rising oil pressure) of the lifting oil cylinder 4 acts on the second differential valve core 302 and pushes the second differential valve core 302 to change direction, after the second differential valve core 302 changes direction, the fourth differential valve core 304 controls the hydraulic oil to flow back to the hydraulic oil tank 12, the P1 and P2 oil ports of the fourth differential valve core 304 are communicated, namely the rod cavity of the lifting oil cylinder is communicated with the rodless cavity, the differential function is started, and in the differential function mode, the ascending speed of the lifting oil cylinder 4 can be increased to D of the original speed2/d2Multiple (D: liter)The cylinder diameter of the oil dropping cylinder 4, d: the rod diameter of the lifting oil cylinder 4) can greatly improve the operation efficiency, the opening of the differential function does not affect the descending operation of the lifting oil cylinder 4, when the lifting oil cylinder 4 descends, the pressure of the rod cavity acting on the first differential valve core 301 is greater than the pressure of the X port of the first differential valve core 301, the first differential valve core 301 is reversed, the differential function is closed, and the lifting oil cylinder 4 can descend normally.
Differential selector valve 6 is the cartridge valve, including valve block and two-way switching-over valve, the L hydraulic fluid port of differential selector valve 6 is connected hydraulic tank 12, differential selector valve 6 sets up on high altitude operation platform 9 for the differential function's that rises of control lift cylinder 4 is opened and close, and the theory of operation does, 5 fuel supplies of relief pressure valve give differential selector valve 6, through the direction of switching-over case control hydraulic oil, differential selector valve 6 has two positions, position 1: hydraulic oil is cut off, differential function is closed, position 2: the hydraulic oil is supplied to the first differential spool 301 of the lift brake differential valve 3, and the differential function is turned on when the lift cylinder 4 is lifted, and the differential function is turned off when the lift cylinder 4 is lowered.
The system further comprises a high-altitude operation platform 9, a platform substrate and a large-flow steel pipe 13, the lifting oil cylinder 4 is fixedly suspended on the platform substrate, the main reversing valve 2 is connected with the descending brake valve 1 and the ascending brake differential valve 3 through the large-flow steel pipe 13, the descending brake valve 1 and the ascending brake differential valve 3 are connected with the lifting oil cylinder 4 through the large-flow steel pipe 13, the pressure reducing valve 5, the differential selection valve 6, the remote pressure regulating valve 7 and the pilot handle 8 are arranged on the high-altitude operation platform 9, and the high-altitude operation platform 9 is fixedly arranged on one side of the platform substrate and used for enabling a worker to operate conveniently.
The hydraulic control system of the lifting oil cylinder of the under-pressure operation machine has the advantages of low manufacturing cost, short shelf life, functions of reversing, braking, differential motion, pressure regulation and the like, low maintenance cost and suitability for various complex well conditions; the main reversing valve adopts a multi-piece structure, the number of the working pieces can be configured according to the flow of the system, and the requirements of various types of pressurized operation machines are met; the reversing of the lifting oil cylinder is controlled by adopting a pilot handle, so that the field operation is facilitated; the working pressure of the lifting oil cylinder is adjusted by adopting a remote pressure adjusting loop, and the lifting oil cylinder is provided with a pilot overflow valve and a remote pressure adjusting valve, so that the working pressure of the lifting oil cylinder can be quickly, conveniently and accurately adjusted, the reversing function of the lifting oil cylinder adopts a load sensitive valve system, the flow and pressure requirements of the system can be sensed, and the efficiency is far higher than that of a conventional hydraulic control system; the pressure reducing valve is connected with a buffer accumulator in parallel, so that a reversing main valve can be accurately and quickly controlled; the lifting oil cylinder is provided with a descending brake valve, so that the braking force can be adjusted according to the operation requirement to ensure the controllable and stable work of the lifting oil cylinder under extreme load; the lifting brake differential valve is arranged, when the load is extremely light, the action of the balance valve core ensures the controllable and stable operation of the lifting oil cylinder, and when the load is small or no load is generated, the action of the differential control valve core can improve the lifting speed, so that the working efficiency is improved; various valves all adopt cartridge valve structures, and the maintenance cost is reduced.
The principle and the implementation of the present invention are explained herein by using specific examples, and the above description of the embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (10)
1. The utility model provides a pressure operation machine lift cylinder hydraulic control system which characterized in that includes: the hydraulic control system comprises a hydraulic oil tank, a hydraulic pump, a main directional valve, a descending brake valve, an ascending brake differential valve, a lifting oil cylinder, a pilot handle, a remote pressure regulating valve, a differential selection valve and a pressure reducing valve, wherein the hydraulic oil tank is connected with the hydraulic pump which is connected with the main directional valve and the pressure reducing valve;
the pilot handle is connected with the main reversing valve and used for controlling the opening degree of the main reversing valve, an A port of the main reversing valve is connected with the ascending brake differential valve, the ascending brake differential valve is connected to a rod cavity of the lifting oil cylinder, a B port of the main reversing valve is connected with the descending brake valve, and the descending brake valve is connected to a rodless cavity of the lifting oil cylinder; a T oil port of the main reversing valve is connected to the hydraulic oil tank;
the differential selection valve is connected with the ascending braking differential valve, and the remote pressure regulating valve is connected with the main reversing valve.
2. The hydraulic control system for the lifting cylinder of the pressurized working machine as recited in claim 1, wherein the port a of the main directional control valve comprises a port a1 and a port a2, the port a1 and the port a2 are both connected with the rising braking differential valve, the port B of the main directional control valve comprises a port B1 and a port B2, the port B1 and the port B2 are both connected with the falling braking valve, the port T of the main directional control valve comprises a port T1 and a port T2, the port T1 and a port T2 are both connected with the hydraulic oil tank, the ports a1 and a2 of the main directional control valve are connected with the port a of the pilot handle, and the ports B1 and B2 of the main directional control valve are connected with the port B of the pilot handle.
3. The hydraulic control system of a lift cylinder of an under-pressure working machine according to claim 2, wherein the pilot handle is a spring automatic reset pilot handle, the opening degree of the pilot handle is in linear relation with the output pressure, the larger the opening degree is, the larger the output pressure is, the larger the opening degree of a valve core of the main directional control valve is, the larger the oil passing amount is, the pressure control section of the pilot handle corresponds to the pilot pressure section of the main directional control valve, and is used for realizing stepless speed regulation of the lift cylinder through the pilot handle, when oil is supplied to the port b of the pilot handle, the main directional control valve controls the lift cylinder to ascend, and when oil is supplied to the port a of the pilot handle, the main directional control valve controls the lift cylinder to descend.
4. The hydraulic control system of a lifting cylinder of an operation machine with pressure according to claim 2, characterized in that the main directional control valve is formed by connecting a plurality of working pieces in parallel, the working pieces are large-flow load-sensitive directional control valves with a flow rate of 450L/min, an overflow valve is arranged at an oil inlet of the main directional control valve and used for overflowing redundant hydraulic oil back to the hydraulic oil tank when the oil passing amount is small, the overflow valves are also arranged at the ports A1, A2, B1 and B2 of the main directional control valve and used for pressure impact and working condition oil supplement of the lifting cylinder, and a pilot overflow valve is arranged in the main directional control valve and used for matching with the remote pressure regulating valve to realize regulation of the working pressure of the lifting cylinder.
5. The hydraulic control system for the lift cylinder of the belt pressure working machine as claimed in claim 4, wherein the remote pressure regulating valve is a cartridge valve, and comprises a valve block and a remote pressure regulating valve core, and is used for remotely regulating a pilot overflow valve of the main directional control valve and controlling the working pressure of the lift cylinder, and the remote pressure regulating valve is connected with an LS1 port or an LS2 port of the main directional control valve.
6. The hydraulic control system for the lift cylinder of the working machine with pressure as claimed in claim 1, wherein the oil outlet of the pressure reducing valve is connected in parallel with a buffer accumulator for ensuring the stability of oil supply.
7. The hydraulic control system for the lift cylinder of the belt press working machine as recited in claim 2, wherein the descending brake valve is a cartridge valve, and comprises a valve block and a plurality of balance valve cores, the balance valve cores are connected in parallel, and the flow rate of the descending brake valve is matched with the flow rate of the rodless cavity of the lift cylinder, so as to balance and control the hydraulic oil in the lift cylinder and prevent overspeed out of control caused by excessive load during descending.
8. The hydraulic control system of a lift cylinder of a working machine under pressure according to claim 2, wherein the lift brake differential valve is a cartridge valve, and comprises a valve block, a plurality of balance valve spools and a plurality of differential control valve spools, the flow rate of the lift brake differential valve is matched with the flow rate of the rod cavity of the lift cylinder for realizing the lift brake function and the differential function, the differential control valve spools comprise a first differential valve spool, a second differential valve spool, a third differential valve spool and a fourth differential valve spool, the first differential valve spool is connected with the differential selection valve, when the differential selection valve does not supply oil, the pressure of the lift cylinder acts on the balance valve spools, the differential control valve spools are inactive, when the differential selection valve supplies oil, the first differential valve spool is pushed to change direction, when the differential selection valve supplies oil, the pressure of the rodless cavity of the lift cylinder pushes the second differential valve spool to change direction, the fourth differential valve core controls hydraulic oil to flow back to the hydraulic oil tank, and a P1 oil port and a P2 oil port of the fourth differential valve are connected, so that a rod cavity and a rodless cavity of the lifting oil cylinder are communicated.
9. The hydraulic control system for the lift cylinder of the belt pressure working machine as claimed in claim 8, wherein the differential selection valve is a cartridge valve, and comprises a valve block and a two-position two-way reversing valve, and the differential selection valve is connected with the lifting braking differential valve and is used for controlling the opening and closing of the lifting differential function.
10. The hydraulic control system for the lifting cylinder of the belt press working machine according to claim 1, further comprising an overhead operating platform, a platform substrate and a large-flow steel pipe, wherein the lifting cylinder is suspended and fixed on the platform substrate, the main reversing valve is connected with the descending brake valve and the ascending brake differential valve through the large-flow steel pipe, the descending brake valve and the ascending brake differential valve are connected with the lifting cylinder through the large-flow steel pipe, the pressure reducing valve, the differential selection valve, the remote pressure regulating valve and the pilot handle are all arranged on the overhead operating platform, and the overhead operating platform is fixed on one side of the platform substrate and used for enabling a worker to operate conveniently.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022982716.XU CN213981423U (en) | 2020-12-11 | 2020-12-11 | Hydraulic control system for lifting oil cylinder of belt press working machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022982716.XU CN213981423U (en) | 2020-12-11 | 2020-12-11 | Hydraulic control system for lifting oil cylinder of belt press working machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213981423U true CN213981423U (en) | 2021-08-17 |
Family
ID=77242439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022982716.XU Active CN213981423U (en) | 2020-12-11 | 2020-12-11 | Hydraulic control system for lifting oil cylinder of belt press working machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213981423U (en) |
-
2020
- 2020-12-11 CN CN202022982716.XU patent/CN213981423U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102167266B (en) | Main winch rapid-descent and confluent return oil regeneration system of rotary drilling rig | |
| CN105351293B (en) | A kind of energy-recuperation system of passive volume synchronization system | |
| CN103807238A (en) | Hydraulic control feeding system and hydraulic control feeding method | |
| CN204200733U (en) | A kind of rock drilling machine propelling pressure hydraulic pressure far controls loop | |
| CN202131037U (en) | Rapid releasing interflow fuel-return regeneration system of main winch of rotary drilling rig | |
| CN213981423U (en) | Hydraulic control system for lifting oil cylinder of belt press working machine | |
| CN103058085A (en) | Winding motor hydraulic system and rotary drilling rig | |
| CN112483500A (en) | Hydraulic control system for lifting oil cylinder of belt press working machine | |
| CN102502434A (en) | Luffing hydraulic controlling system of joint lift | |
| CN204873719U (en) | Quick -witted hydraulic control system lifts | |
| CN108468672B (en) | Energy-saving hydraulic system of stepping heating furnace | |
| CN201793316U (en) | Protective device of orange peel bucket hydraulic control system | |
| CN102616700A (en) | Oil and air hybrid driven lifting control device | |
| CN202296922U (en) | Crane variable-amplitude control valve and crane variable-amplitude hydraulic system | |
| CN214499592U (en) | Two-way speed governing hydraulic pressure valves | |
| CN204900372U (en) | It presses multistage pressure regulating control system of formula to lift organizational security | |
| CN205207318U (en) | Quick oil return oil circuit of hydraulic cylinder | |
| CN203783998U (en) | Hydraulic-controlfeeding system | |
| CN212956684U (en) | Bulldozer working valve with quick drop function | |
| CN203065074U (en) | Winding motor hydraulic system and rotary drilling rig | |
| CN212475915U (en) | Novel hydraulic winch fast lowering system | |
| CN107740789B (en) | Mountain modeling drilling machine feeding hydraulic control system | |
| CN219345110U (en) | Hydraulic control system of lifting mechanism and lifting system | |
| CN202370497U (en) | Rotary digging drilling machine and main winch floating system of rotary digging drilling machine | |
| CN201502576U (en) | Balance valve unit for large-load main oil cylinder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A hydraulic control system for the lifting oil cylinder of a pressure operated machine Granted publication date: 20210817 Pledgee: Bank of China Limited by Share Ltd. Cangzhou branch Pledgor: HEBEI XINTIEHU PETROLEUM MACHINERY Co.,Ltd. Registration number: Y2024980009984 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |