CN109404440B - Automatic locking device for road bridge mechanical anti-slip - Google Patents

Automatic locking device for road bridge mechanical anti-slip Download PDF

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Publication number
CN109404440B
CN109404440B CN201811419779.5A CN201811419779A CN109404440B CN 109404440 B CN109404440 B CN 109404440B CN 201811419779 A CN201811419779 A CN 201811419779A CN 109404440 B CN109404440 B CN 109404440B
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China
Prior art keywords
oil
port
oil cylinder
valve
self
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CN201811419779.5A
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CN109404440A (en
Inventor
施向华
易佳佳
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Hejian Kattor Industrial Co ltd
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Hejian Kattor Industrial Co ltd
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Classifications

    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D63/00—Brakes not otherwise provided for; Brakes combining more than one of the types of groups F16D49/00 - F16D61/00
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
    • 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
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • 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
    • F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
    • 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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/26—Locking mechanisms
    • 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
    • F15B21/02—Servomotor systems with programme control derived from a store or timing device; Control devices therefor
    • 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
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
    • 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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/26—Locking mechanisms
    • F15B2015/268—Fluid supply for locking or release independent of actuator pressurisation
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F15B2211/20569—Type of pump capable of working as pump and motor
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/615—Filtering means
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/72—Output members, e.g. hydraulic motors or cylinders or control therefor having locking means
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2121/00—Type of actuator operation force
    • F16D2121/02—Fluid pressure
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2125/00—Components of actuators
    • F16D2125/02—Fluid-pressure mechanisms

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Machines (AREA)

Abstract

The invention provides an automatic locking device for preventing a road bridge machine from sliding downwards, which is used as an automatic locking device for enabling a back pressure roller arranged at the lower part of the road bridge machine to move or be fixed on a slideway at the upper part of the road bridge machine; the device provided by the invention belongs to a normally closed mechanism, is failure-protected and has high reliability; meanwhile, the PLC and the hydraulic system are automatically controlled, the experience of people is not relied on, and the practicability is high; through pressure control, the use is not affected, and the equipment can be ensured not to slide down under any condition; the device has the advantages of small integral structure, light weight, independent arrangement, wide application range and strong transformation universality.

Description

Automatic locking device for road bridge mechanical anti-slip
Technical Field
The invention relates to the technical field of bridge construction, in particular to an automatic locking device for preventing a road bridge from sliding down.
Background
At present, in the use of road bridge machinery, because the bridge exists vertical slope, in order to reduce the complete machine height of equipment, improve stability, when the slope is great, equipment can take the slope to remove and cross often, consequently has produced extra downhill sliding force.
The upper part and the lower part of the road bridge machine are contacted by adopting a sliding plate and a roller, and lubricating grease is often smeared on the contact surface, so that the effective friction force for preventing the sliding is very small, and the calculation is uncontrollable and accurate. Because the equipment has certain action impact when moving, the influence of wind power and downhill sliding force cause a large risk of sliding down, and once the equipment slides down, the equipment is a mechanical accident of death.
Based on the above, in order to overcome the shortcomings of the prior art, an automatic locking mechanism capable of preventing equipment from sliding down and guaranteeing construction safety is required to be designed.
Disclosure of Invention
The invention provides an automatic locking mechanism capable of preventing equipment from sliding down and guaranteeing construction safety.
The invention adopts the technical proposal for solving the problems that:
An automatic locking device for preventing a road and bridge machine from slipping down, as an automatic locking device for moving or fixing a counter pressure roller provided at a lower portion of the road and bridge machine on a slide rail at an upper portion of the road and bridge machine, comprising:
the pressure combining part comprises a cam, a slide way and a back pressure roller, wherein the back pressure roller comprises a first roller arranged at one end of the slide way in a rolling way and a second roller arranged at the other end of the slide way in a rolling way, and the cam is arranged below the first roller;
The mounting part comprises a first mounting plate, a mounting seat and a second mounting plate which are sequentially arranged, wherein a first roller is rotatably arranged at the upper end of the first mounting plate, a second roller is rotatably arranged at the upper end of the second mounting plate, a connecting rod is arranged between the first mounting plate and the mounting seat, one end of the connecting rod is rotatably connected to the first mounting plate, and the other end of the connecting rod is rotatably connected to the mounting seat;
The driving part comprises a self-locking oil cylinder and a pushing oil cylinder, the self-locking oil cylinder is fixed at the lower part of the first mounting plate, the end part of the movable end of the self-locking oil cylinder is rotatably connected with a cam, the middle part of the pushing oil cylinder is rotatably connected to the mounting seat, and the movable end of the pushing oil cylinder is rotatably connected to the lower part of the second mounting plate;
The hydraulic control system comprises a PLC controller and a hydraulic station, wherein the PLC controller is electrically connected with the hydraulic station, the hydraulic station is respectively connected with a self-locking oil cylinder and a pushing oil cylinder, and the PLC controller controls the action of the driving part through the hydraulic station and receives feedback signals of the driving part.
Further, a high-pressure spring is arranged in the rodless cavity of the self-locking oil cylinder.
Further, the cams are symmetrically arranged with the self-locking oil cylinder as a center.
Further, a plurality of teeth are arranged on the contact surface of the cam and the first roller.
Further, the hydraulic station includes:
An oil tank;
An oil delivery pipeline; and
The control valve group is provided with an oil inlet, an oil return port, a first working oil port, a second working oil port, a third working oil port and a fourth working oil port which are sequentially arranged, the oil inlet and the oil return port are connected to the oil tank through oil conveying pipelines, the first working oil port is connected with a rodless cavity of the pushing oil cylinder, the second working oil port is connected with a rod cavity of the pushing oil cylinder, the third working oil port is connected with the rodless cavity of the self-locking oil cylinder, and the fourth working oil port is connected with the rod cavity of the self-locking oil cylinder;
The PLC is used for controlling the control valve group, the pushing oil cylinder stretches out or retracts through the first working oil port and the second working oil port, the self-locking oil cylinder stretches out or retracts through the third working oil port and the fourth working oil port, and the oil conveying pipeline and the control valve group are arranged to be of an integrated oil circuit block structure or a hydraulic element dispersing arrangement structure.
Further, a liquid level meter is arranged on the side of the oil tank, and an air filter is arranged in the oil tank.
Furthermore, an oil return filter is arranged on the oil pipeline between the oil return port and the oil tank, and a one-way valve, a motor pump group and an oil suction valve are sequentially arranged on the oil pipeline between the oil inlet and the oil tank.
Still further, be provided with first electromagnetic directional control valve, second electromagnetic directional control valve and third electromagnetic directional control valve in the control block, first electromagnetic directional control valve is two-position two-way valve, second electromagnetic directional control valve and third electromagnetic directional control valve are three-position four-way valve, first electromagnetic directional control valve, second electromagnetic directional control valve and third electromagnetic directional control valve all constitute the return circuit with oil inlet, oil return port respectively, still parallelly connected first relief valve that is provided with on the first electromagnetic directional control valve, be provided with first work hydraulic fluid port and second work hydraulic fluid port on the second electromagnetic directional control valve, be provided with third work hydraulic fluid port and fourth work hydraulic fluid port on the third electromagnetic directional control valve.
Furthermore, balance valves are arranged on the oil pipeline between the rodless cavity and the rod cavity of the pushing oil cylinder and the control block, and a pressure sensor is also arranged on the oil pipeline between the rodless cavity of the pushing oil cylinder and the first working oil port.
Still further, pressure sensor, second relief valve and backpressure valve have been set gradually on the output tube way between the rodless chamber of auto-lock hydro-cylinder and the third hydraulic fluid port, the second relief valve still is connected to the oil return port, be provided with electromagnetic ball valve on the output tube way between the rodless chamber of auto-lock hydro-cylinder and the fourth hydraulic fluid port, the rodless chamber of auto-lock hydro-cylinder still is connected and is provided with proximity switch.
Compared with the prior art, the invention has the advantages that:
The device provided by the invention belongs to a normally closed mechanism, is failure-protected and has high reliability; meanwhile, the PLC and the hydraulic system are automatically controlled, the experience of people is not relied on, and the practicability is high; through pressure control, the use is not affected, and the equipment can be ensured not to slide down under any condition; the device has the advantages of small integral structure, light weight, independent arrangement, wide application range and strong transformation universality.
Drawings
FIG. 1 is a schematic diagram of a structure in one embodiment of the invention;
FIG. 2 is a schematic diagram of a hydraulic control system according to an embodiment of the present invention;
FIG. 3 is a schematic workflow diagram in one embodiment of the invention;
fig. 4 is a schematic structural diagram of a cam 02 according to an embodiment of the present invention.
Reference numerals illustrate:
01. Counter pressure roller, 01a, first roller, 01b, second roller, 02, cam, 03, self-locking oil cylinder, 04, slideway, 05, pushing oil cylinder, 06, PLC controller, 07, hydraulic station, 08, first mounting plate, 09, mounting seat, 010, second mounting plate, 011, connecting rod, 1, oil tank, 2, liquid level meter, 3, motor pump group, 4, oil discharge valve, 5, oil suction valve, 6, check valve, 7, oil return filter, 8, air filter, 9, integrated oil path block structure, 10, first relief valve, 11, first electromagnetic directional valve, 12, second electromagnetic directional valve, 12a, first working oil port, 12b, second working oil port, 13, third electromagnetic directional valve, 13a, third working oil port, 13b, fourth working oil port, 14, back pressure valve, 15, second relief valve, 16, electromagnetic ball valve, 17, pressure sensor, 18, high pressure spring, 19, proximity switch, 20, balance valve.
Detailed Description
One embodiment of the present invention will be described in detail below with reference to the attached drawings, but it should be understood that the scope of the present invention is not limited by the embodiment.
As shown in fig. 1 and 2, an automatic locking device for preventing a road and bridge machine from sliding down according to an embodiment of the present invention, as an automatic locking device for moving or fixing a counter-pressure roller 01 disposed at a lower portion of the road and bridge machine on a slide 04 at an upper portion of the road and bridge machine, includes:
The pressure combination part comprises a cam 02, a slideway 04 and a counter pressure roller 01, wherein the counter pressure roller 01 comprises a first roller 01a arranged at one end of the slideway 04 in a rolling way and a second roller 01b arranged at the other end of the slideway 04 in a rolling way, and the cam 02 is arranged below the first roller 01 a;
The mounting part comprises a first mounting plate 08, a mounting seat 09 and a second mounting plate 010 which are sequentially arranged, wherein a first roller 01a is rotatably arranged at the upper end of the first mounting plate 08, a second roller 01b is rotatably arranged at the upper end of the second mounting plate 010, a connecting rod 011 is arranged between the first mounting plate 08 and the mounting seat 09, one end of the connecting rod 011 is rotatably connected to the first mounting plate 08, and the other end of the connecting rod 011 is rotatably connected to the mounting seat 09;
The driving part comprises a self-locking oil cylinder 03 and a pushing oil cylinder 05, wherein the self-locking oil cylinder 03 is fixed at the lower part of the first mounting plate 08, the end part of the movable end of the self-locking oil cylinder 03 is rotatably connected with a cam 02, the middle part of the pushing oil cylinder 05 is rotatably connected to a mounting seat 09, and the movable end of the pushing oil cylinder 05 is rotatably connected to the lower part of the second mounting plate 010;
The hydraulic control system comprises a PLC (programmable logic controller) 06 and a hydraulic station 07, wherein the PLC 06 is electrically connected with the hydraulic station 07, the hydraulic station 07 is respectively connected with a self-locking oil cylinder 03 and a pushing oil cylinder 05, and the PLC 06 controls the action of a driving part through the hydraulic station 07 and receives a feedback signal of the driving part.
In specific implementation, a high-pressure spring 18 is arranged in the rodless cavity of the self-locking oil cylinder 03.
In specific implementation, as shown in fig. 4, two cams 02 are symmetrically arranged around the self-locking cylinder 03.
In specific implementation, a plurality of teeth are arranged on the contact surface of the cam 02 and the first roller 01a, so that locking force is increased.
In particular, the hydraulic station 07 comprises:
An oil tank 1;
An oil delivery pipeline; and
The control valve group is provided with an oil inlet, an oil return port, a first working oil port 12a, a second working oil port 12b, a third working oil port 13a and a fourth working oil port 13b which are sequentially arranged, wherein the oil inlet and the oil return port are connected to the oil tank 1 through oil delivery pipelines, the first working oil port 12a is connected with a rodless cavity of the pushing oil cylinder 05, the second working oil port 12b is connected with a rod-containing cavity of the pushing oil cylinder 05, the third working oil port 13a is connected with the rodless cavity of the self-locking oil cylinder 03, and the fourth working oil port 13b is connected with the rod-containing cavity of the self-locking oil cylinder 03;
The PLC controller 06 is configured to control the control valve group, extend or retract the pushing cylinder 05 through the first working oil port 12a and the second working oil port 12b, and extend or retract the self-locking cylinder 03 through the third working oil port 13a and the fourth working oil port 13b, where the oil delivery pipeline and the control valve group are configured as an integrated oil path block structure 9 or a hydraulic element dispersion arrangement structure.
In specific implementation, the side of the oil tank 1 is provided with a liquid level meter 2, and an air filter 8 is arranged in the oil tank 1.
In specific implementation, an oil return filter 7 is arranged on the oil transmission pipeline between the oil return port and the oil tank 1, and a one-way valve 6, a motor pump set 3 and an oil suction valve 5 are sequentially arranged on the oil transmission pipeline between the oil inlet and the oil tank 1.
During implementation, a first electromagnetic directional valve 11, a second electromagnetic directional valve 12 and a third electromagnetic directional valve 13 are arranged in the control block, the first electromagnetic directional valve 11 is a two-position two-way valve, the second electromagnetic directional valve 12 and the third electromagnetic directional valve 13 are three-position four-way valves, the first electromagnetic directional valve 11, the second electromagnetic directional valve 12 and the third electromagnetic directional valve 13 respectively form a loop with an oil inlet and an oil return port, the first electromagnetic directional valve 11 is further provided with a first safety valve 10 in parallel, the second electromagnetic directional valve 12 is provided with a first working oil port 12a and a second working oil port 12b, and the third electromagnetic directional valve 13 is provided with a third working oil port 13a and a fourth working oil port 13b.
In specific implementation, the balance valve 20 is disposed on the oil pipeline between the rodless cavity and the rod cavity of the pushing cylinder 05 and the control block, and the pressure sensor 17 is disposed on the oil pipeline between the rodless cavity of the pushing cylinder 05 and the first working oil port 12 a.
In specific implementation, a pressure sensor 17, a second safety valve 15 and a back pressure valve 14 are sequentially arranged on an output pipeline between the rodless cavity of the self-locking oil cylinder 03 and the third working oil port 13a, the second safety valve 15 is further connected to an oil return port, an electromagnetic ball valve 16 is arranged on an output pipeline between the rod cavity of the self-locking oil cylinder 03 and the fourth working oil port 13b, and a proximity switch 19 is further connected and arranged on the rod cavity of the self-locking oil cylinder 03.
On the basis of the scheme, the invention prevents the equipment from sliding down by adding an additional automatic locking mechanism on the premise of not influencing the use of the equipment, ensures the safety of movement and overstrepan, and the locking and unlocking actions are automatically controlled by a hydraulic control system.
The technical solution of the invention is realized by three aspects:
(1) Automatic locking: the elastic force of the high-pressure spring 18 is utilized, the elastic force is amplified by the cam 02, the elastic force acts on the equipment slideway 04 in a double-sided clamping mode, the locking force has an exponential increasing trend along with the clamping stroke, and the locking is in a normally closed structure and fails to be locked;
(2) Unlocking: the high-pressure spring 18 is compressed through the self-locking oil cylinder 03, so that the cam 02 and the slideway 04 are loosened, the unlocking purpose is achieved, and at the moment, the equipment can move or overspan;
(3) When the hydraulic control system is used, the pushing oil cylinder 05 is calculated to be 120bar or more to push equipment, the design pressure of the system is set to be 315bar, the unlocking pressure of the self-locking mechanism is set to be 100bar, and when the pressure of the pushing oil cylinder 05 is reduced to be less than 100bar, the self-locking mechanism is automatically locked.
Namely, in the hydraulic control system provided by the invention, the rated pressure of the first safety valve 10 is set to 315bar, the rated pressure of the rodless cavity side of the balance valve 20 connected with the pushing oil cylinder 05 is set to 230bar, the rated pressure of the rod cavity side of the balance valve 20 connected with the pushing oil cylinder 05 is set to 150bar, the working pressure of the second safety valve 15 is set to 100bar, the rated pressure of the pressure sensor 17 is set to 100bar, the pressure state can be detected at any time, the rod cavity of the self-locking oil cylinder 03 is provided with the proximity switch 19 to reflect the unlocking/locking state of the locking position at any time, and the pressure value and the locking position state are fed back to the PLC 06 for monitoring.
As shown in fig. 3, the working process of the invention is as follows:
In a normal state, the self-locking mechanism is in a locked state, when the equipment needs to move, the PLC 06 and the switch of the hydraulic station 07 are opened, the pushing oil cylinder 05 is operated to act, the pressure is gradually increased, when the pressure exceeds 100bar, the self-locking mechanism is unlocked, and when the pressure continues to be increased to 120bar, the equipment starts to move. When the equipment moves to a designated position or a movement stroke is completed, the pushing cylinder 05 starts to retract, the hydraulic system is unloaded instantaneously, and the self-locking mechanism also completes locking instantaneously. When the equipment has a sliding trend in the pushing process, the pressure of the pushing oil cylinder 05 can be immediately reduced, and when the pressure is lower than 100bar, the self-locking mechanism can also lock the equipment instantly to prevent sliding.
More than 95% of road and bridge machines have the moving function, and more than 50% of bridges have the longitudinal gradient of more than 2%, so that the invention can be applied to all walking type pushing moving equipment, and has wide application occasions, huge demand and high reliability.
The foregoing disclosure is merely illustrative of some embodiments of the invention, but the embodiments are not limited thereto, and any variations that may be contemplated by one skilled in the art should fall within the scope of the invention.

Claims (10)

1. An automatic locking device for preventing a road and bridge machine from slipping down, as an automatic locking device for moving or fixing a counter pressure roller (01) provided at a lower portion of the road and bridge machine on a slide (04) at an upper portion of the road and bridge machine, comprising:
The pressure combining part comprises a cam (02), a slide way (04) and a back pressure roller (01), wherein the back pressure roller (01) comprises a first roller (01 a) arranged at one end of the slide way (04) in a rolling way and a second roller (01 b) arranged at the other end of the slide way (04) in a rolling way, and the cam (02) is arranged below the first roller (01 a);
The mounting part comprises a first mounting plate (08), a mounting seat (09) and a second mounting plate (010) which are sequentially arranged, wherein a first roller (01 a) is rotatably arranged at the upper end of the first mounting plate (08), a second roller (01 b) is rotatably arranged at the upper end of the second mounting plate (010), a connecting rod (011) is arranged between the first mounting plate (08) and the mounting seat (09), one end of the connecting rod (011) is rotatably connected to the first mounting plate (08), and the other end of the connecting rod (011) is rotatably connected to the mounting seat (09);
the driving part comprises a self-locking oil cylinder (03) and a pushing oil cylinder (05), wherein the self-locking oil cylinder (03) is fixed at the lower part of the first mounting plate (08), the end part of the movable end of the self-locking oil cylinder (03) is rotatably connected with a cam (02), the middle part of the pushing oil cylinder (05) is rotatably connected to the mounting seat (09), and the movable end of the pushing oil cylinder (05) is rotatably connected to the lower part of the second mounting plate (010);
the hydraulic control system comprises a PLC (programmable logic controller) (06) and a hydraulic station (07), wherein the PLC (06) is electrically connected with the hydraulic station (07), the hydraulic station (07) is respectively connected with a self-locking oil cylinder (03) and a pushing oil cylinder (05), and the PLC (06) controls the action of a driving part through the hydraulic station (07) and receives a feedback signal of the driving part.
2. An automatic locking device for road and bridge mechanical anti-slip according to claim 1, characterized in that: a high-pressure spring (18) is arranged in the rodless cavity of the self-locking oil cylinder (03).
3. An automatic locking device for road and bridge mechanical anti-slip according to claim 1, characterized in that: the cams (02) are symmetrically arranged by taking the self-locking oil cylinder (03) as a center.
4. An automatic locking device for road and bridge mechanical anti-slip according to claim 1, characterized in that: a plurality of teeth are arranged on the contact surface of the cam (02) and the first roller (01 a).
5. An automatic locking device for road and bridge mechanical anti-slip according to claim 1, characterized in that said hydraulic station (07) comprises:
An oil tank (1);
An oil delivery pipeline; and
The control valve group is provided with an oil inlet, an oil return port, a first working oil port (12 a), a second working oil port (12 b), a third working oil port (13 a) and a fourth working oil port (13 b) which are sequentially arranged, wherein the oil inlet and the oil return port are connected to the oil tank (1) through oil delivery pipelines, the first working oil port (12 a) is connected with a rodless cavity of the pushing oil cylinder (05), the second working oil port (12 b) is connected with a rod cavity of the pushing oil cylinder (05), the third working oil port (13 a) is connected with a rod cavity of the self-locking oil cylinder (03), and the fourth working oil port (13 b) is connected with a rod cavity of the self-locking oil cylinder (03);
The PLC (06) is used for controlling the control valve group, the pushing oil cylinder (05) is extended or retracted through the first working oil port (12 a) and the second working oil port (12 b), the self-locking oil cylinder (03) is extended or retracted through the third working oil port (13 a) and the fourth working oil port (13 b), and the oil conveying pipeline and the control valve group are arranged into an integrated oil circuit block structure (9) or a hydraulic element dispersing arrangement structure.
6. An automatic locking device for road and bridge mechanical anti-slip as claimed in claim 5, wherein: the side of the oil tank (1) is provided with a liquid level meter (2), and an air filter (8) is arranged in the oil tank (1).
7. An automatic locking device for road and bridge mechanical anti-slip as claimed in claim 5, wherein: an oil return filter (7) is arranged on an oil pipeline between the oil return port and the oil tank (1), and a one-way valve (6), a motor pump set (3) and an oil suction valve (5) are sequentially arranged on the oil pipeline between the oil inlet and the oil tank (1).
8. An automatic locking device for road and bridge mechanical anti-slip as claimed in claim 5, wherein: be provided with first electromagnetic directional valve (11), second electromagnetic directional valve (12) and third electromagnetic directional valve (13) in the control block, first electromagnetic directional valve (11) are two-position two-way valve, second electromagnetic directional valve (12) and third electromagnetic directional valve (13) are three-position four-way valve, first electromagnetic directional valve (11), second electromagnetic directional valve (12) and third electromagnetic directional valve (13) all constitute the return circuit with oil inlet, oil return port respectively, still parallelly connected first relief valve (10) are provided with on first electromagnetic directional valve (11), be provided with first work hydraulic fluid port (12 a) and second work hydraulic fluid port (12 b) on second electromagnetic directional valve (12), be provided with third work hydraulic fluid port (13 a) and fourth work hydraulic fluid port (13 b) on third electromagnetic directional valve (13).
9. An automatic locking device for road and bridge mechanical anti-slip as claimed in claim 8, wherein: balance valves (20) are arranged on the oil pipeline between the rodless cavity and the rod-containing cavity of the pushing oil cylinder (05) and the control block, and a pressure sensor (17) is also arranged on the oil pipeline between the rodless cavity of the pushing oil cylinder (05) and the first working oil port (12 a).
10. An automatic locking device for road and bridge mechanical anti-slip as claimed in claim 9, wherein: the pressure sensor (17), the second safety valve (15) and the back pressure valve (14) are sequentially arranged on an output pipeline between a rodless cavity of the self-locking oil cylinder (03) and the third working oil port (13 a), the second safety valve (15) is further connected to an oil return port, an electromagnetic ball valve (16) is arranged on an output pipeline between a rod cavity of the self-locking oil cylinder (03) and the fourth working oil port (13 b), and the rod cavity of the self-locking oil cylinder (03) is further connected with a proximity switch (19).
CN201811419779.5A 2018-11-26 2018-11-26 Automatic locking device for road bridge mechanical anti-slip Active CN109404440B (en)

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CN114321224B (en) * 2021-12-20 2024-06-28 北京银河方圆科技有限公司 Braking system for medical instrument

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CN201549860U (en) * 2009-09-04 2010-08-11 唐洪华 Multilevel brake mining hydrodynamic transmission stepping type pipe cable single track towing device
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