CN110805585A - Hydraulic control double one-way valve and single-cylinder cone crusher hydraulic system - Google Patents
Hydraulic control double one-way valve and single-cylinder cone crusher hydraulic system Download PDFInfo
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- CN110805585A CN110805585A CN201911148768.2A CN201911148768A CN110805585A CN 110805585 A CN110805585 A CN 110805585A CN 201911148768 A CN201911148768 A CN 201911148768A CN 110805585 A CN110805585 A CN 110805585A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/023—Excess flow valves, e.g. for locking cylinders in case of hose burst
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/025—Check valves with guided rigid valve members the valve being loaded by a spring
Abstract
The invention provides a hydraulic control double one-way valve and a hydraulic system of a single-cylinder cone crusher, wherein two hydraulic control one-way valves are combined into one hydraulic control double one-way valve, so that the size of a pipeline is shortened, the on-way pressure loss is reduced, the hydraulic control double one-way valve is more energy-saving and environment-friendly, the installation size is reduced, the size of a valve block is reduced, the processing cost is saved, the service life is prolonged, and the maintenance and use cost is saved; the hydraulic double-control one-way valve is applied to the single-cylinder cone crusher, the position of the main shaft of the single-cylinder cone crusher can be controlled, the position of the main shaft of the single-cylinder cone crusher is kept when the single-cylinder cone crusher works, the service life of a hydraulic system is prolonged, and the reliability is improved.
Description
Technical Field
The invention relates to a hydraulic control one-way valve and a crusher hydraulic system, in particular to a hydraulic control double one-way valve and a single-cylinder cone crusher hydraulic system.
Background
At present, a hydraulic control one-way valve commonly used in the market realizes pressure maintaining by one-way valve, and hydraulic oil can freely flow by overcoming the pressure of a spring and the pressure of an oil port when the hydraulic oil flows in the positive direction. The check valve can be opened reversely under the action of the oil pressure control force, and at the moment, hydraulic oil can flow reversely. The sealing surface of the sealing ring is easy to damage under the action of high-frequency impact load, so that the internal leakage is increased, and the pressure can not be maintained.
The common hydraulic system of the single-cylinder cone crusher controls the ascending and descending of a main shaft of the single-cylinder cone crusher by the positive and negative rotation of an electromagnetic reversing valve or a gear pump. The oil pressure maintaining in the oil cylinder of the single-cylinder cone crusher is realized by an electromagnetic valve or a hydraulic control one-way valve. The solenoid valve and the hydraulic control one-way valve are all used for maintaining pressure by utilizing the principle that the reverse leakage of the one-way valve is small, the early effect is good, but the sealing surface of the one-way valve can be abraded after the one-way valve is used for a period of time to cause leakage, simultaneously, because of the working characteristic of the single-cylinder cone crusher, the impact high frequency of the load is high when the material is crushed, the impact load can be about twice of the normal working load, the alternating frequency of the load reaches 300 times per minute, and the service lives of the solenoid valve and the hydraulic control one-way valve are short. The overload protection of the single-cylinder cone crusher is realized by buffering protection through an energy accumulator. When the energy accumulator is in overload protection, the protection pressure of the energy accumulator is continuously increased, the reaction speed of the energy accumulator is limited, the energy accumulator cannot play a role in protection when in large overload, and key parts of a main machine are often damaged, so that great loss is caused.
Disclosure of Invention
The invention aims to provide a hydraulic control double-check valve which is energy-saving, efficient, good in pressure maintaining effect, impact-resistant and long in service life, and is applied to a hydraulic system of a single-cylinder cone crusher so as to improve the overload protection and the operation reliability of the hydraulic system.
The technical purpose of the invention is realized by the following technical scheme:
the utility model provides a two check valves of hydraulic control, includes valve body, valve barrel and case, the valve body is installed on the hydraulic valve piece, its characterized in that: the hydraulic valve comprises a valve body, a valve sleeve, a valve core, a spring I, a spring II, a steel ball and a control piston, wherein the valve sleeve is arranged in a hydraulic valve block and connected with the valve body; the hydraulic valve block is provided with a first valve port, a second valve port, a third valve port and a mounting cavity, the valve body and the valve sleeve are mounted in the mounting cavity, the first valve port is communicated with the second one-way valve cavity, the second valve port is communicated with the second one-way valve cavity through a radial hole, and the third valve port is communicated with the first one-way valve cavity through an oblique hole.
Further, the outside of valve body is equipped with the external screw thread, and the inboard is equipped with the internal thread, and the valve body passes through external screw thread structural mounting on the hydraulic valve piece, and the valve body passes through the internal thread to be connected with the sliding sleeve.
Furthermore, the elastic coefficient of the spring II is smaller than that of the spring I, and the spring II is a conical spring and ensures that the opening pressure of the spring I is larger than that of the spring II.
Furthermore, the valve core consists of a guide rod, a valve head and a boss, the spring I is sleeved on the guide rod, one end of the spring I is installed in a positioning groove of the valve body, a sealing surface of the first one-way valve is arranged on the valve head, and the spring II is sleeved on the boss.
Furthermore, the control piston consists of a push rod, a transition rod and a piston rod, a clamp spring groove is formed in the bottom of the inner cavity of the valve sleeve, and the control piston is limited in the valve cavity of the second one-way valve by installing a clamp spring in the clamp spring groove.
Furthermore, the number of the oblique holes and the number of the radial holes are multiple.
Furthermore, a first groove and a second groove are formed in the outer side wall of the valve sleeve, the first groove is arranged in the middle of the second valve port and the third valve port, the second groove is arranged between the first valve port and the second valve port, a first check ring I and an O-shaped ring II are installed in the first groove, and a second check ring II and an O-shaped ring III are installed in the second groove.
The hydraulic system of the single-cylinder cone crusher comprises an oil absorption filter, a ball valve, a gear pump, a motor, a shaft coupler and the hydraulic control double one-way valve, wherein the gear pump is connected with the motor through the shaft coupler, an oil inlet of the gear pump is connected with an oil tank through a pipeline, the ball valve and the oil absorption filter, an oil outlet of the gear pump is connected with an inlet of a pressure filter through a pipeline, an outlet of the pressure filter is connected with an electromagnetic directional valve, a first overflow valve connected with the oil tank is arranged on a pipeline between the pressure filter and the electromagnetic directional valve, the electromagnetic directional valve is a three-position four-way electromagnetic valve, two interfaces of the electromagnetic directional valve are respectively connected with a first valve port and a second valve port of the hydraulic control double one-way valve, and a third valve port of the electromagnetic directional valve.
Furthermore, a bypass connected with the oil tank is arranged on a pipeline between the hydraulic control double check valve and the magnetic filter, a pressure gauge, a pressure sensor and a throttling stop valve are sequentially connected onto the bypass in series, a pressure gauge switch is further arranged between the pressure gauge and the bypass, and the pressure gauge, the pressure sensor and the throttling stop valve are further connected with a second overflow valve in parallel.
Furthermore, a pipeline between the magnetic filter and the oil cylinder is connected with the oil tank through a bypass provided with a safety valve.
In conclusion, the invention has the following beneficial effects:
1. the control piston of the hydraulic control double-check valve can control the two check valves to open at the same time, and the first check valve can keep the pressure of the load and bear the impact from the load; the second check valve can keep the pressure of the load and avoid the impact of the load at the same time, when the two check valves are combined together, the impact capacity to the load can be greatly improved, the service life of the hydraulic control double check valve is prolonged, the hydraulic control double check valve is particularly suitable for occasions with large and frequent impact and pressure maintaining requirements, the two hydraulic control check valves are combined into the hydraulic control double check valve, the pipeline size is shortened, the on-way pressure loss is reduced, the hydraulic control double check valve is more energy-saving and environment-friendly, the installation size is reduced, the size of a valve block is reduced, the processing cost is saved, the service life is prolonged, and the maintenance.
2. Apply to single cylinder cone crusher with two accuse check valves of hydraulic pressure, can effectively keep the hydraulic system's of single cylinder cone crusher during operation stability, reduce and let out leakage quantity, increase hydraulic system's pressurize effect, can realize keeping its main shaft position to the accurate control of single cylinder cone crusher main shaft position, extension hydraulic system life-span, improvement reliability at single cylinder cone crusher during operation.
3. The single-cylinder cone crusher adopting the hydraulic control one-way valve has the advantages that the uniformity of the particle size of crushed stone is better, the consistency of the particle size of the crushed stone is good after the machine works for a long time, and compared with the traditional cone crusher using a common one-way valve, the single-cylinder cone crusher can reduce the crushing energy consumption by about 6.5 percent and improve the crushing efficiency by about 10 percent.
Drawings
FIG. 1 is a schematic diagram of the hydraulic system of the crusher of the present invention;
FIG. 2 is a general view of the structure of the pilot operated double check valve of the present invention;
FIG. 3 is a schematic diagram of a pilot operated double check valve of the present invention;
FIG. 4 is an installation view of the pilot operated double check valve of the present invention;
FIG. 5 is a valve body of the pilot operated double check valve of the present invention;
FIG. 6 is a valve sleeve of the hydraulically controlled double check valve of the present invention;
FIG. 7 is a pilot piston of the pilot operated double check valve of the present invention;
fig. 8 is a valve core of the hydraulic control double-one-way valve.
In the figure: 1. An oil absorption filter; 2. A ball valve; 3. a gear pump; 4. a motor; 5. a coupling; 6. a pressure filter; 7. a first overflow valve; 8. an electromagnetic directional valve; 9. a hydraulic control double one-way valve; 10. an overflow valve II; 11. a throttle stop valve; 12. a pressure sensor; 13. a pressure gauge switch; 14. a magnetic filter; 15. a pressure gauge; 16. a safety valve; 17. an oil cylinder; 18. an oil tank; 9-1, a valve body; 9-2, an O-shaped ring I; 9-3, valve sleeve; 9-4, a check ring I; 9-5, an O-shaped ring II; 9-6, a control piston; 9-7, a spring I; 9-8, valve core; 9-9 and a spring II; 9-10, steel balls; 9-11 parts of check ring II; 9-12 and an O-shaped ring III; 9-13, a clamp spring; 9-14, a hydraulic valve block; 9-15 and a first valve port; 9-16 and a second valve port; 9-17 and a valve port III; 9-18, a first one-way valve chamber; 9-19, a second one-way valve cavity; 9-20, mounting cavities; 9-1-1, positioning groove; 9-3-1, sealing surface; 9-3-2, oblique holes; 9-3-3, sealing the spherical surface; 9-3-4 of an inner conical surface; 9-3-5, groove one; 9-3-6, radial holes; 9-3-7 and a second groove; 9-3-8, a clamp spring groove; 9-6-1, push rod; 9-6-2, a transition rod; 9-6-3, a piston rod; 9-8-1, a guide rod; 9-8-2, valve head; 9-8-3 and a boss.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The first embodiment is as follows: as shown in fig. 2-8, a hydraulic control double one-way valve comprises a valve body 9-1, a valve sleeve 9-3 and a valve core 9-8, wherein the valve body 9-1 is installed on a hydraulic valve block 9-14, the valve sleeve 9-3 is installed inside the hydraulic valve block 9-14 and connected with the valve body 9-1, preferably, the outer side of the valve body 9-1 is provided with an external thread, the inner side of the valve body is provided with an internal thread, the valve body 9-1 is installed on the hydraulic valve block 9-14 through an external thread structure, and is sealed by a 0-shaped ring i, and the valve body 9-1 is connected with a sliding sleeve 9-3 through an internal thread; a first one-way valve cavity 9-18 is formed between the upper end of the valve sleeve 9-3 and the valve body 9-1, an inner cavity at the lower end of the valve sleeve 9-3 is a second one-way valve cavity 9-19, a valve core 9-8 is installed in the first one-way valve cavity 9-18, a spring I9-7 is sleeved outside the valve core 9-8, a spring II 9-9, a steel ball 9-10 and a control piston 9-6 are installed in the second one-way valve cavity 9-19, the spring II 9-9 is installed between the steel ball 9-10 and the valve core 9-8, and the steel ball 9-10 is matched with the sealing spherical surface 9-3-3 to form a sealing structure; the hydraulic valve block 9-14 is provided with a first valve port 9-15, a second valve port 9-16, a third valve port 9-17 and an installation cavity 9-20, the valve body 9-1 and the valve sleeve 9-3 are installed in the installation cavity 9-20, the first valve port 9-15 is communicated with a second one-way valve cavity 9-19, the second valve port 9-16 is communicated with the second one-way valve cavity 9-19 through a radial hole 9-3-6, and the third valve port 9-17 is communicated with the first one-way valve cavity 9-18 through an oblique hole 9-3-2.
Preferably, the elastic coefficient of the spring II 9-9 is smaller than that of the spring I9-7, and the spring II 9-9 is a conical spring.
Preferably, the valve core 9-8 consists of a guide rod 9-8-1, a valve head 9-8-2 and a boss 9-8-3, the spring I9-7 is sleeved on the guide rod 9-8-1, one end of the spring I9-7 is arranged in a positioning groove 9-1-1 of the valve body 9-1, the function of the valve is to ensure that the spring I9-7 is installed in place and simultaneously ensure that the valve core 9-8 is installed in a centering way, the valve head 9-8-2 is provided with a conical sealing surface of the first one-way valve, the conical sealing surface is matched with the sealing surface 9-3-1 of the valve sleeve 9-3, the spring II 9-9 is sleeved on the boss 9-8-3, so that the spring II 9-9 is prevented from being installed in place.
Preferably, the control piston 9-6 consists of a push rod 9-6-1, a transition rod 9-6-2 and a piston rod 9-6-3, one end of the transition rod 9-6-2, which is close to the push rod 9-6-1, is set to be a conical surface, which can effectively reduce the pressure loss of hydraulic oil, the bottom of the inner cavity of the valve sleeve 9-3 is provided with a clamp spring groove 9-3-8, the control piston 9-6 is limited in the second one-way valve cavity 9-19 by installing a clamp spring 9-13 in the clamp spring groove 9-3-8, and the push rod 9-6-1 is guided by an inner conical surface 9-3-4 when reciprocating in the inner cavity of the valve sleeve 9-3.
Preferably, the inclined holes 9-3-2 and the radial holes 9-3-6 are distributed uniformly on the respective circumferences, so that the pressure applied to the piston 9-6 and the valve core 9-8 in each direction can be balanced and controlled, and the working stability is improved.
Preferably, the outer side wall of the valve sleeve 9-3 is provided with a first groove 9-3-5 and a second groove 9-3-7, the first groove 9-3-5 is arranged at the position between the second valve port 9-16 and the third valve port 9-17, the second groove 9-3-7 is arranged at the position between the first valve port 9-15 and the second valve port 9-16, a check ring I9-4 and an O-shaped ring II 9-5 are arranged in the groove I9-3-5, the check ring I9-4 and the O-shaped ring II 9-5 play a sealing role between the valve port II 9-16 and the valve port III 9-17, and a retainer ring II 9-11 and an O-shaped ring III 9-12 are arranged in the second groove 9-3-8, and the retainer ring II 9-11 and the O-shaped ring III 9-12 play a sealing role between the first valve port 9-15 and the second valve port 9-16.
The working principle of the hydraulic control double-check valve is as follows: when the first valve port 9-15 has no control pressure, the passage from the third valve port 9-17 to the second valve port 9-16 is closed by the spring II 9-9 pressing the steel ball 9-10, and the pressure oil can enter the third valve port 9-17 from the second valve port 9-16 through smaller opening pressure; when the control pressure of the first valve port 9-15 reaches the opening pressure of the two check valves, the control piston 9-6 pushes the steel ball 9-10 to compress the spring I9-7 and the spring II 9-9, a channel between the two check valves is opened, and the hydraulic oil of the third valve port 9-17 can reversely flow to the second valve port 9-16; the O-shaped ring I9-2 is used for isolating the valve port III 9-17 from air; the O-shaped ring II 9-5 is used for isolating hydraulic oil at the second valve port 9-16 and the third valve port 9-17; the O-shaped ring III 9-12 is used for isolating hydraulic oil between the first valve port 9-15 and the second valve port 9-16; the first check valve can maintain the pressure of the load and bear the impact from the load; the second one-way valve can keep the pressure of the load and avoid the impact of the load, and when the two one-way valves are combined together, the impact capacity to the load can be greatly improved, and the service life of the load can be greatly prolonged, so that the valve is particularly suitable for occasions with large and frequent impact and pressure maintaining requirements; the two hydraulic control one-way valves are combined into one hydraulic control double one-way valve, so that the size of a pipeline is shortened, the on-way pressure loss is reduced, and the hydraulic control double one-way valve is more energy-saving and environment-friendly; the mounting size is reduced, the size of the valve block is reduced, the processing cost is saved, the service life is prolonged, and the maintenance and use cost is saved.
Example two: as shown in figure 1, the hydraulic system of the single-cylinder cone crusher comprises an oil suction filter 1, a ball valve 2, a gear pump 3, a motor 4 and a coupler 5, the hydraulic control double one-way valve 9 is characterized in that the gear pump 3 is connected with the motor 4 through the coupler 5, an oil inlet of the gear pump 3 is connected with the oil tank 18 through the pipeline, the ball valve 2 and the oil absorption filter 1, an oil outlet of the gear pump 3 is connected with an inlet of the pressure filter 6 through the pipeline, an outlet of the pressure filter 6 is connected with the electromagnetic directional valve 8, an overflow valve I7 connected with the oil tank 18 is arranged on the pipeline between the pressure filter 6 and the electromagnetic directional valve 8, the electromagnetic directional valve 8 is a three-position four-way electromagnetic valve, two ports of the electromagnetic directional valve 8 are respectively connected with a first valve port 9-15 and a second valve port 9-16 of the hydraulic control double one-way valve 9, and a third valve port 9-17 of the electromagnetic directional valve 8 is connected with an oil cylinder 17 of the single-cylinder cone crusher through a pipeline and a magnetic filter 14.
Preferably, a bypass connected with the oil tank 18 is arranged on a pipeline between the hydraulic control double check valve 9 and the magnetic filter 14, a pressure gauge 15, a pressure sensor 12 and a throttling stop valve 11 are sequentially connected on the bypass in series, a pressure gauge switch 13 is further arranged between the pressure gauge 15 and the bypass, and the pressure gauge 15, the pressure sensor 12 and the throttling stop valve 11 are further connected with a second overflow valve 10 in parallel.
Preferably, the line between the magnetic filter 14 and the cylinder 17 is connected to the tank 18 by a bypass provided with a safety valve 16.
The working principle of the single-cylinder cone crushing hydraulic system is as follows: the gear pump 3 is connected with the motor 4 through the coupler 5, and the gear pump 3 sucks oil from the oil tank 18 through the oil suction filter 1 and then pumps the oil into the pressure filter 6 and then enters the electromagnetic directional valve 8; when the left position of the three-position four-way electromagnetic directional valve 8 is electrified, pressure oil is introduced into the valve port II 9-16 of the hydraulic control double one-way valve 9 and then directly passes through the valve port III 9-17 of the hydraulic control double one-way valve 9, and then enters the oil cylinder 17 of the single-cylinder cone crusher through the magnetic filter 14 to jack up the main shaft of the single-cylinder cone crusher; when the right position of the electromagnetic directional valve 8 is electrified, pressure oil pumped out by the gear pump 3 enters a first valve port of the hydraulic control double one-way valve 9, when the pressure reaches the reverse opening pressure of the hydraulic control double one-way valve 9, the hydraulic control double one-way valve 9 is opened, and hydraulic oil in the oil cylinder 17 flows back to the oil tank through the hydraulic control double one-way valve 9 and the electromagnetic directional valve 8; when the electromagnetic directional valve 8 is not electrified, the electromagnetic valve is in a middle position, and the hydraulic oil is locked in the oil cylinder 17 and the pipeline by the hydraulic control double-one-way valve 9; the first overflow valve 7 is used for adjusting the hydraulic oil pressure at the outlet of the gear pump 3, and the second overflow valve 10 limits the pressure of a valve port three 9-17 of the hydraulic control double check valve 9; when the position of the main shaft of the single-cylinder cone crusher is changed, the size of the discharge port of the crusher can be adjusted by controlling the position of the main shaft to be automatically controlled by a hydraulic system through a PLC control program (not shown in the part of the figure); the oil absorption filter is a 180-micron filter, so that the cleanliness of hydraulic oil entering the gear pump is guaranteed, and the service life of the gear pump is effectively prolonged. The pressure filter adopts a 10-micron filter screen, so that the hydraulic cleanliness of an overflow valve, an electromagnetic directional valve, a hydraulic control double-check valve, a throttle stop valve, a pressure sensor, a pressure gauge switch, a safety valve and an oil cylinder is effectively ensured, and the elements are ensured to work reliably and have prolonged service life; the magnetic filter is used for removing iron-containing abrasive dust, dust and other impurities in the oil, reduces abrasion among the kinematic pairs and prolongs the service life of the kinematic pairs. The throttle stop valve is used for manually discharging oil in an oil cylinder and a pipeline, and is opened when a hydraulic element is maintained and replaced, so that the operation is simple and reliable. The pressure gauge 15 is used for visual observation and the working pressure of the oil cylinder, and is used for pressure regulation when the pressure of each overflow valve is regulated. The pressure sensor 12 is used for collecting hydraulic pressure in the oil cylinder by the PLC and judging the load condition during working, so that the discharge hole is adjusted, the automation degree is high, the labor intensity is reduced, and the working efficiency is improved. The safety valve 16 is composed of a large-diameter two-way logic cartridge valve, the overflow pressure of the safety valve is set by a pilot valve, the pressure is kept unchanged during overload, the oil passing capacity of the safety valve is 5-6 times of that of a common energy accumulator, the reaction time is fast, and the overload protection capacity of a host machine is greatly improved.
Example three: crushing a granite raw material by using a single-cylinder cone crusher of a hydraulic system in the second embodiment, wherein three crushers with the serial numbers of 1, 2 and 3 are selected, the rated power of a motor of the three crushers is 240KW, the particle size distribution of the selected granite raw material is 20-300mm, the rotating speed of an eccentric shaft of each crusher is set to be 300r/min, the alternating load pressure is changed between 0 and 6MPa, the three crushers work for 2 months and work for 12 hours every day, and the leakage rates of two check valves of the three single-cylinder cone crushers are respectively measured to be 1.2 drops/min under the working pressure; 1.7 drops/min and 1.5 drops/min, which is less than the standard requirement of 3 drops/min.
Example four: the granite is crushed by three crushers, the numbers of which are 1, 2 and 3, in the third embodiment after two months of operation, the particle size distribution of the granite raw material is 20-300mm, the rotating speed of an eccentric shaft of the crusher is set to be 300r/min, the width range of a discharge port is 10-30mm, the alternating load pressure is changed between 0-6MPa, the crushers are started, the power consumption of a single crusher is monitored by an ammeter, after the crusher works for 1 hour, the granite crushed by the crusher at the moment is taken out to be sieved, the particle size distribution of the crushed granite of the three crushers is measured, and the power consumption of the three crushers is recorded.
Comparative example one: the hydraulic control double check valves of the three single-cylinder cone crushers in the embodiment are changed into common hydraulic check valves in the prior art, granite raw materials are crushed, three crushers with the numbers of 4, 5 and 6 are selected, the rated power of a motor of the three crushers is 240KW, the particle size distribution of the granite raw materials is 20-300mm, the rotating speed of an eccentric shaft of each crusher is set to be 300r/min, the alternating load pressure is changed between 0 and 6MPa, the three single-cylinder cone crushers work for 2 months and 12 hours every day, and the leakage rates of the check valves of the three single-cylinder cone crushers are respectively 5.2ml/min under the working pressure; 6.7ml/min and 5.8ml/min, which is originally more than 3 drops/min required by the standard.
Comparative example two: crushing granite by using three crushers, which are respectively marked with 4, 5 and 6, after two months of operation in the comparative example 1, selecting granite raw materials with the particle size distribution of 20-300mm, setting the rotating speed of an eccentric shaft of the crusher to be 300r/min, setting the width range of a discharge port to be 10-30mm, changing the alternating load pressure to be 0-6MPa, starting the crushers, monitoring the power consumption of a single crusher by using an electric meter, sieving the granite crushed by the crusher at the moment after the crusher operates for 1 hour, measuring the particle size distribution of the three crushers after the three crushers crush, and recording the power consumption of the three crushers.
TABLE 1
As is apparent from table 1 above, the single-cylinder cone crusher using the hydraulic control double check valve in example three has an average leakage rate of only 1.47 drops/min after two months of operation (12 hours of operation per day), which meets the standard of 3 drops/min; in comparison example I, after the single-cylinder cone crusher adopting the existing hydraulic control one-way valve works for two months (12 hours per day), the average leakage rate is only 5.9ml/min, which is far larger than the standard 3 drops/min; simultaneously because the use of this hydraulically controlled bi-directional valve, reduced the operating time of hydraulic pump, control valve, hydro-cylinder, reduced the consumption of spare parts such as corresponding hydraulic pump, control valve, hydro-cylinder seal, also practiced thrift because of the hydraulic oil waste that the change accessory leads to, increased the activity duration on the whole, improved the production efficiency of mine enterprise.
TABLE 2
As can be seen from Table 2, the average weight ratio of the particle size distribution of the granite after being crushed by the single-cylinder cone crusher with the numbers of 1-3, which is 10-30mm, is 84.3%, and the average power consumption is 212.7 Kw/h; the average weight ratio of the particle size distribution of the granite after being crushed by the single-cylinder cone crusher with the number of 4-6 between 10 mm and 30mm is 76.3%, and the average power consumption is 227.3Kw/h, so that the average particle size uniformity of the granite after being crushed by the crusher adopting the hydraulic control double one-way valve is better after the crusher adopting the hydraulic control double one-way valve works for two months, meanwhile, the power is averagely saved by 14.6Kw/h per hour by each crusher, and the production cost is reduced.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (10)
1. A hydraulic control double one-way valve comprises a valve body (9-1), a valve sleeve (9-3) and a valve core (9-8), wherein the valve body (9-1) is arranged on a hydraulic valve block (9-14), and the hydraulic control double one-way valve is characterized in that: the valve sleeve (9-3) is arranged inside the hydraulic valve block (9-14) and is connected with the valve body (9-1), a first one-way valve cavity (9-18) is formed between the upper end of the valve sleeve (9-3) and the valve body (9-1), an inner cavity at the lower end of the valve sleeve (9-3) is a second one-way valve cavity (9-19), a valve core (9-8) is arranged in the first one-way valve cavity (9-18), a spring I (9-7) is sleeved outside the valve core (9-8), a spring II (9-9), a steel ball (9-10) and a control piston (9-6) are arranged in the second one-way valve cavity (9-19), the spring II (9-9) is arranged between the steel ball (9-10) and the valve core (9-8); the hydraulic valve block (9-14) is provided with a first valve port (9-15), a second valve port (9-16), a third valve port (9-17) and an installation cavity (9-20), the valve body (9-1) and the valve sleeve (9-3) are installed in the installation cavity (9-20), the first valve port (9-15) is communicated with a second one-way valve cavity (9-19), the second valve port (9-16) is communicated with the second one-way valve cavity (9-19) through a radial hole (9-3-6), and the third valve port (9-17) is communicated with the first one-way valve cavity (9-18) through an oblique hole (9-3-2).
2. A pilot operated double check valve according to claim 1, wherein: the outer side of the valve body (9-1) is provided with an external thread, the inner side of the valve body is provided with an internal thread, the valve body (9-1) is installed on the hydraulic valve block (9-14) through an external thread structure, and the valve body (9-1) is connected with the sliding sleeve (9-3) through an internal thread.
3. A pilot operated double check valve according to claim 2, wherein: the elastic coefficient of the spring II (9-9) is smaller than that of the spring I (9-7), and the spring II (9-9) is a conical spring.
4. A pilot operated double check valve according to claim 3 wherein: the valve core (9-8) is composed of a guide rod (9-8-1), a valve head (9-8-2) and a boss (9-8-3), the spring I (9-7) is sleeved on the guide rod (9-8-1), one end of the spring I (9-7) is installed in a positioning groove (9-1-1) of the valve body (9-1), a sealing surface of a first one-way valve is arranged on the valve head (9-8-2), and the spring II (9-9) is sleeved on the boss (9-8-3).
5. The pilot-operated double check valve according to claim 4, wherein: the control piston (9-6) consists of a push rod (9-6-1), a transition rod (9-6-2) and a piston rod (9-6-3), a clamp spring groove (9-3-8) is formed in the bottom of the inner cavity of the valve sleeve (9-3), and the control piston (9-6) is limited in the second one-way valve cavity (9-19) by installing a clamp spring (9-13) in the clamp spring groove (9-3-8).
6. A pilot operated double check valve according to claim 5 wherein: the number of the oblique holes (9-3-2) and the number of the radial holes (9-3-6) are both multiple.
7. A pilot operated double check valve according to claim 6 wherein: the outer side wall of the valve sleeve (9-3) is provided with a first groove (9-3-5) and a second groove (9-3-7), the first groove (9-3-5) is arranged in the middle of a second valve port (9-16) and a third valve port (9-17), the second groove (9-3-7) is arranged between the first valve port (9-15) and the second valve port (9-16), a first check ring I (9-4) and an O-shaped ring II (9-5) are installed in the first groove (9-3-5), and a second check ring II (9-11) and an O-shaped ring III (9-12) are installed in the second groove (9-3-8).
8. The utility model provides a single cylinder cone crusher hydraulic system, includes oil absorption filter (1), ball valve (2) gear pump (3), motor (4) and shaft coupling (5), its characterized in that: the hydraulic control double one-way valve (9) as claimed in any one of claims 1 to 7, wherein the gear pump (3) is connected with the motor (4) through a coupling (5), an oil inlet of the gear pump (3) is connected with the oil tank (18) through a pipeline, the ball valve (2) and the oil absorption filter (1), an oil outlet of the gear pump (3) is connected with an inlet of the pressure filter (6) through a pipeline, an outlet of the pressure filter (6) is connected with the electromagnetic directional valve (8), a first overflow valve (7) connected with the oil tank (18) is arranged on a pipeline between the pressure filter (6) and the electromagnetic directional valve (8), the electromagnetic directional valve (8) is a three-position four-way electromagnetic valve, two ports of the electromagnetic directional valve (8) are respectively connected with a first valve port (9-15) and a second valve port (9-16) of the hydraulic control double one-way valve (9), and a third valve port (9-17) of the electromagnetic directional valve (8) is connected with the single one-way The oil cylinders (17) of the cylinder cone crusher are connected.
9. The single cylinder cone crusher hydraulic system of claim 8, wherein: the hydraulic control double check valve is characterized in that a bypass connected with an oil tank (18) is arranged on a pipeline between the hydraulic control double check valve (9) and the magnetic filter (14), a pressure gauge (15), a pressure sensor (12) and a throttling stop valve (11) are sequentially connected onto the bypass in series, a pressure gauge switch (13) is further arranged between the pressure gauge (15) and the bypass, and the pressure gauge (15), the pressure sensor (12) and the throttling stop valve (11) are further connected with an overflow valve II (10) in parallel.
10. The single cylinder cone crusher hydraulic system of claim 9, wherein: and a pipeline between the magnetic filter (14) and the oil cylinder (17) is connected with an oil tank (18) through a bypass provided with a safety valve (16).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911148768.2A CN110805585A (en) | 2019-11-21 | 2019-11-21 | Hydraulic control double one-way valve and single-cylinder cone crusher hydraulic system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911148768.2A CN110805585A (en) | 2019-11-21 | 2019-11-21 | Hydraulic control double one-way valve and single-cylinder cone crusher hydraulic system |
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| CN110805585A true CN110805585A (en) | 2020-02-18 |
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| CN201911148768.2A Pending CN110805585A (en) | 2019-11-21 | 2019-11-21 | Hydraulic control double one-way valve and single-cylinder cone crusher hydraulic system |
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Application publication date: 20200218 |