CN213416035U - Bar type strong wind prevention rail braking system - Google Patents
Bar type strong wind prevention rail braking system Download PDFInfo
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- CN213416035U CN213416035U CN202022104517.9U CN202022104517U CN213416035U CN 213416035 U CN213416035 U CN 213416035U CN 202022104517 U CN202022104517 U CN 202022104517U CN 213416035 U CN213416035 U CN 213416035U
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Abstract
The utility model discloses a strong wind track braking system is prevented to stick formula, including the braking unit, the braking unit mainly comprises brake stick, brake frame, brake cylinder, trapezoidal bolt subassembly. The system is small in size, easy to install, small in influence on mechanical performance of the gantry crane, and has the advantages of being large in windproof braking force, stable in dynamic braking, simple and fast in braking operation and obvious in strong wind prevention braking effect, windproof braking measures of sudden strong wind of the gantry crane in a working state and the purpose of preventing the strong wind of the gantry crane in a non-working state are achieved, and the problem that the gantry crane effectively prevents the strong wind in operation or non-operation is effectively solved.
Description
Technical Field
The utility model belongs to open-air track gantry crane (hereinafter referred to as gantry crane) braking system that prevents wind especially relates to a strong wind track braking system is prevented to stick formula.
Background
The gantry crane is large loading and unloading equipment for the open-air operation of a railway freight yard, and due to the large windward area and the high gravity center, under the influence of windy weather, the gantry crane has the safety risk of being blown by strong wind to run out of control and run and even overturn. The wind-proof braking function (braking force) of the existing rail portal crane in the working state is determined by the sliding dynamic friction force of a driving wheel and a steel rail of the crane, and is in direct proportion to the mass of the crane, taking a common portal crane (36T, span 26m and self-weight 130 tons) as an example, the dynamic wind-proof braking force of the machine is as follows: 130T 50% 0.1 (sliding friction coefficient between wheels and steel rails) 9.8-63.7 (KN), the thrust of 7.0 grade wind acting on the machine is calculated to be 72.93KN by using a portal crane design manual, and the calculation data shows that the conventional dynamic windproof device can only prevent 6 grades of strong wind, and a set of windproof system is required to be added to prevent the strong wind of more than 7 grades. In addition, in areas with complex meteorological conditions, sudden strong wind without signs exists frequently, and the wind power is increased from 2-3 levels to more than 10 levels suddenly, so that great potential safety hazards are brought to the safety of the portal crane, particularly the portal crane in the operation process. The unit where the applicant is located has occurred many times an accident caused by the sudden strong wind blowing the gantry crane, and although the accident gantry crane has the wind-proof braking device and works normally, the accident gantry crane still causes serious economic loss.
At present, the external windproof devices adopted by the gantry cranes at home and abroad are of electric rail clamping devices, wheel brakes, windproof braking iron shoes, windproof ground anchors and the like.
(1) Electric rail clamping device
The device is arranged on the end face of a gantry crane trolley, a lever is pushed by an oil cylinder or spring force to generate one to two times clamping force so that a clamp clamps a track to generate frictional resistance (windproof braking force), and the frictional resistance is transmitted to a gantry crane trolley through a brake frame system and prevents a travelling part of the gantry crane from moving to generate windproof function. The electric rail clamping device has larger clamping force, is a device with larger braking force in the existing external-hanging type windproof device, and has dynamic and static braking functions. The technical defects are as follows: firstly, it is difficult to achieve smooth braking. The wind-proof device can not realize the accurate control of the braking time and the braking friction force in the braking starting process, so that the portal crane generates severe shake in the dynamic wind-proof braking process, and uncertainty is brought to the safety of hoisted goods of the portal crane; secondly, the surface of the clamp cannot be in surface contact with the side surface of the steel rail at any time during braking, and as the clamp brake block is fixed on the brake frame by welding, when the verticality between the steel rail and the wheel changes, the clamping surface of the clamp has the problem of insufficient deviation rectifying capability and cannot be in surface contact with the side surface of the steel rail, and the windproof braking effect is finally influenced due to small friction contact area; thirdly, the overall size is large, and the performance and the structure of the gantry crane are affected. To ensure sufficient clamping force and maintain high braking force over time, the relevant dimensions must be increased in design to ensure that a strong spring can be installed, which is why the external mounting dimensions (length, width, height) of the electric rail clamp typically exceed 1500 x 800 x 1200.
(2) Wheel brake
The device is characterized in that a spring brake is arranged on a brake wheel in a transmission system of a traveling motor of a cart of the portal crane to perform windproof braking on a driving wheel of the portal crane, the driving wheel is changed from rolling friction to sliding friction to achieve the purpose of increasing friction force, and the windproof braking effect is converted. The wind-proof effect of the wheel brake wind-proof device is visual, and the wind-proof effect can be seen through the sliding of the wheels or the strong braking of the wheels; the defects are as follows: firstly, the wind resistance is weak, for example, half wheels (namely driving wheels) can generate wind resistance of 50% 0.1 (the sliding friction coefficient between the wheels and steel rails) of the total vehicle weight, only 6 grades of wind can be prevented, the full wheels can be braked, the wind resistance of 0.1 of the total vehicle weight can be generated, 9 grades of wind can be prevented, and strong wind above 10 grades cannot be prevented; secondly, to realize the all-wheel braking, more braking devices need to be added (one set of driven large wheel needs to be additionally arranged), the change of the running gear of the gantry crane is larger, the problem of poor matching between the wind-proof effect and the fund investment is solved, and the cost performance is lower.
(3) Wind-proof braking iron shoe
The device is characterized in that arc-shaped wedge blocks are arranged on steel rails on two sides of wheels of a portal crane, and after iron shoes are pressed by rolling wheels of a cart of the portal crane, rolling friction between the wheels of the cart and the steel rails is converted into sliding friction between the steel rails and the iron shoes, and the generated friction resistance is basically equivalent to that generated by a wheel brake. The windproof effect of the windproof braking iron shoe is visual, the investment cost required by the artificial iron shoe is small, and a certain cost performance is achieved; the technical defects are that firstly, the wind-proof capability is weak, most of the iron shoes can only be placed on one side of each large wheel due to the influence of the structure of a cart trolley of the portal crane, when wind blows to a certain side, only 50% of wheels of the whole cart can play the wind-proof effect, so that the wind power of 6-level wind can only be prevented, and the wind-proof capability of the wind-proof iron shoes is wind-proof equipment with weak wind-proof capability in all external wind-proof equipment; secondly, if the artificial skate is used, the artificial skate needs to be installed in advance before the portal crane is blown by wind, and two auxiliary personnel are needed to be installed at the same time to play a role quickly. If the electric iron shoes are used, each iron shoe needs to be matched with a set of pushing mechanism, a large installation space is needed, the walking trolley of the gantry crane is transformed to a certain degree, and then system installation can be achieved.
(4) Wind-proof ground anchor
The device is characterized in that more than four fixed-point anchoring points are arranged in a field, and the portal crane is connected with the anchoring points in series in a connection mode of a steel wire rope, an iron chain, a bolt and the like, so that the aim of preventing the portal crane from being blown away and turned over by wind is fulfilled. The windproof ground anchor has the advantages of strong windproof capability, anti-blowing function and low subsequent maintenance cost; the defects are as follows: firstly, the installation and dismantling time is long, a large number of required installation personnel are needed, and although the windproof capability is strong, related personnel and related tools need to be informed in advance when installing, the problem that the device can be used immediately when the device faces the imminent strong wind is neutral cannot be met, and the device is only suitable for being used on the premise that the strong wind early warning is issued; secondly, the design of the anchoring mode lacks the technical standard aiming at each gantry crane, and most of the fixed parts of the anchoring points are buried under the field, so that effective detection cannot be achieved, and the problem of uncertain anchoring force may exist in specific implementation.
Disclosure of Invention
The to-be-solved technical problem of the utility model is to provide a strong wind rail braking system is prevented to stick formula that small, easy installation, prevent wind by force and can realize that the developments are prevent wind.
In order to solve the technical problem, the utility model discloses a following technical scheme:
a bar type strong wind prevention rail braking system comprises a braking unit, wherein the braking unit mainly comprises a braking bar, a braking frame, a braking oil cylinder mechanism, a trapezoidal bolt assembly and a return spring assembly; the brake bar comprises two bar type brake blocks which are arranged symmetrically left and right; the brake frame comprises two positioning floating beams, two brake beams and two brake pins, wherein the two brake beams are arranged symmetrically left and right, and the two brake beams are connected and installed on the two positioning floating beams through the two brake pins; the front and rear outermost beam plates of the positioning floating beam are provided with positioning protruding blocks, and the lowest part of each protruding block is a positioning semi-arc surface; the brake beam is provided with a brake oil cylinder mechanism, a trapezoidal bolt assembly and a return spring assembly at the upper half part of the positioning floating beam, and two bar type brake blocks are respectively arranged at the lower half part of the positioning floating beam through a brake bar fixing plate; the brake oil cylinder mechanism is formed by connecting a brake oil cylinder, an oil cylinder fixing frame, a thrust positioning frame and a thrust positioning plate in series, the brake oil cylinder is arranged on the oil cylinder fixing frame, the right end of the oil cylinder fixing frame is connected with the upper part of the right brake beam through a support clamping plate, and the left end of the oil cylinder fixing frame is connected with the upper part of the left brake beam through the thrust positioning frame and the thrust positioning plate through the support clamping plate; a trapezoidal bolt assembly is arranged on the outer side of the brake beam; the trapezoidal bolt assembly comprises a trapezoidal nut seat, a trapezoidal bolt, a thrust sleeve and two fixing pins, the trapezoidal bolt is installed in the trapezoidal nut seat, the thrust sleeve is installed on the head of the trapezoidal bolt and connected with a thrust positioning frame, the trapezoidal nut seat is installed in the hollow space of the left braking frame through the two fixing pins, and the axis of the trapezoidal bolt is superposed with the axis of the thrust of the braking oil cylinder mechanism; the left brake beam and the right brake beam are connected with a return spring assembly between the top ends of the left brake beam and the right brake beam, the return spring assembly is composed of two tension springs, two mounting columns, an adjusting seat and two adjusting bolts, the two mounting columns are respectively mounted at the tops of the left brake beam and the right brake beam, the adjusting seat is mounted on the outer side of the mounting column at the top of the right brake beam, the two adjusting bolts are mounted on the adjusting seat, and two ends of each tension spring are respectively fixed on the mounting columns and the adjusting bolts.
The rod type strong wind prevention rail braking system further comprises a hydraulic driving unit, wherein the hydraulic driving unit mainly comprises a braking oil cylinder, a spring compression oil cylinder and a pressure adjusting spring, and the spring compression oil cylinder is connected with the braking oil cylinder through an oil way.
The rod type strong wind prevention rail braking system further comprises a suspension lifting mechanism, wherein the suspension lifting mechanism mainly comprises a lifting oil cylinder and a lifting plate, the lower end of the lifting plate is connected with two positioning floating beams, the upper end of the lifting plate is connected with the lifting oil cylinder through a connecting plate, and the rod type strong wind prevention rail braking system is composed of a braking unit used for protecting a non-working state.
The rod type strong wind prevention rail braking system further comprises a braking box and an outer cover box, wherein the braking unit is installed in the braking box, the outer cover box is arranged on the braking box, and the lifting oil cylinder is installed in the outer cover box.
Aiming at the problems of wind-proof braking of the existing gantry crane, the inventor designs and manufactures a bar type strong wind-proof rail braking system which comprises a braking unit, wherein the braking unit mainly comprises a braking bar, a braking frame, a braking oil cylinder and a trapezoidal bolt assembly. The system is small in size, easy to install, small in influence on mechanical performance of the gantry crane, and has the characteristics of large windproof braking force, stable dynamic braking, simplicity and rapidness in braking operation and obvious strong wind prevention braking effect, windproof braking measures of sudden strong wind of the gantry crane in a working state and the aim of preventing the strong wind of the gantry crane in a non-working state are achieved, and the problem of effectively preventing the strong wind (including the sudden strong wind) of the gantry crane (including low-speed rail operation machinery such as a chain bucket type coal unloader and the like) in operation or non-operation is effectively solved. Research shows, the utility model discloses the biggest clamp force of brake clamp reaches 600KN, and two sets of dress wind-proof systems can produce the frictional resistance that prevent wind that is greater than or equal to 400KN, can improve to preventing 13 grades of wind levels from preventing 6 grades of wind levels with the developments wind-proof system that current ordinary gantry crane was used always, protect the safety of operating personnel and equipment better.
Drawings
Fig. 1 is a schematic diagram of a braking unit of the rod type strong wind prevention rail braking system of the present invention.
Fig. 2 is a schematic diagram of a hydraulic driving unit of the rod type strong wind prevention rail braking system of the present invention.
Fig. 3 is a schematic diagram of a trapezoidal bolt assembly of the rod-type strong wind prevention rail braking system of the present invention.
Fig. 4 is a schematic view of the suspension lifting mechanism of the rod-type strong wind prevention rail braking system of the present invention.
Fig. 5 is a schematic view of the bar type strong wind prevention rail brake system of the present invention in use.
Fig. 6 is the final braking effect diagram of the rod type strong wind prevention rail braking system of the present invention.
In the figure: 1. the brake device comprises a brake rod, 2 parts of a brake rod fixing plate, 3 parts of a left brake beam, 4 parts of a right brake beam, 5 parts of a positioning floating beam, 6 parts of a brake frame pin shaft, 7 parts of a brake cylinder, 8 parts of a cylinder fixing frame, 9 parts of a thrust positioning frame, 10 parts of a thrust positioning plate, 11 parts of a trapezoidal bolt assembly, 12 parts of a support clamping plate 1 and 13 parts of a support clamping plate 2 and 14 parts of a return spring assembly, 15 parts of a hanging plate, 16 parts of a connecting plate, 17 parts of a hanging cylinder, 18 parts of a brake box, 19 parts of an outer cover box, 20 parts of a spring compression cylinder, 21 parts of a pressure adjusting spring, 22 parts of an oil circuit, 23 parts of a thrust sleeve, 24 parts of a pin shaft, 25 parts of a trapezoidal nut seat, 26 parts of a trapezoidal bolt, 27 steel rail, 28 wind direction, 29.
Detailed Description
A, basic structure
The rod type strong wind prevention rail braking system comprises a braking unit, a hydraulic driving unit, a suspension lifting mechanism, a braking box and an outer cover box, wherein the braking box and the outer cover box are used for loading the mechanisms, the braking unit is installed in the braking box, the outer cover box is arranged on the braking box, and a lifting oil cylinder is installed in the outer cover box. Wherein the content of the first and second substances,
the brake unit mainly comprises a brake rod, a brake frame, a brake oil cylinder mechanism, a trapezoidal bolt assembly and a return spring assembly; the brake bar comprises two bar type brake blocks which are arranged symmetrically left and right;
the brake frame comprises two positioning floating beams, two brake beams and two brake pins, wherein the two brake beams are arranged symmetrically left and right, and the two brake beams are connected and installed on the two positioning floating beams through the two brake pins; the front and rear outermost beam plates of the positioning floating beam are provided with positioning protruding blocks, and the lowest part of each protruding block is a positioning semi-arc surface; the brake beam is provided with a brake oil cylinder mechanism, a trapezoidal bolt assembly and a return spring assembly at the upper half part of the positioning floating beam, and two bar type brake blocks are respectively arranged at the lower half part of the positioning floating beam through a brake bar fixing plate;
the brake oil cylinder mechanism is formed by connecting a brake oil cylinder, an oil cylinder fixing frame, a thrust positioning frame and a thrust positioning plate in series, the brake oil cylinder is arranged on the oil cylinder fixing frame, the right end of the oil cylinder fixing frame is connected with the upper part of the right brake beam through a support clamping plate, and the left end of the oil cylinder fixing frame is connected with the upper part of the left brake beam through the thrust positioning frame and the thrust positioning plate through the support clamping plate;
a trapezoidal bolt assembly is arranged on the outer side of the brake beam; the trapezoidal bolt assembly comprises a trapezoidal nut seat, a trapezoidal bolt, a thrust sleeve and two fixing pins, the trapezoidal bolt is installed in the trapezoidal nut seat, the thrust sleeve is installed on the head of the trapezoidal bolt and connected with a thrust positioning frame, the trapezoidal nut seat is installed in the hollow space of the left side braking frame through the two fixing pins, and the axial lead of the trapezoidal bolt is coincided with the axial lead of the thrust of the braking oil cylinder mechanism.
The left brake beam and the right brake beam are connected with a return spring assembly between the top ends of the left brake beam and the right brake beam, the return spring assembly is composed of two tension springs, two mounting columns, an adjusting seat and two adjusting bolts, the two mounting columns are respectively mounted at the tops of the left brake beam and the right brake beam, the adjusting seat is mounted on the outer side of the mounting column at the top of the right brake beam, the two adjusting bolts are mounted on the adjusting seat, and two ends of each tension spring are respectively fixed on the mounting columns and the adjusting bolts.
The hydraulic driving unit mainly comprises a brake oil cylinder, a spring compression oil cylinder and a pressure adjusting spring, wherein the spring compression oil cylinder is connected with the brake oil cylinder through an oil way.
The suspension lifting mechanism mainly comprises a lifting oil cylinder and a lifting plate, wherein the lower end of the lifting plate is connected with two positioning floating beams, the upper end of the lifting plate is connected with the lifting oil cylinder through a connecting plate, and the suspension lifting mechanism is used for protecting a brake unit in a non-working state.
Second, mechanism function
(1) A brake box: the structure is compact, and the interior space size is around 300mm 450mm 750mm, and its main part of loading brake unit.
(2) A bar brake pad: the rod type brake block is hung at the bottom of the brake clamp in a hinged mode, the center of a circular arc fulcrum is clamped relative to the brake rod, the brake rod can flexibly rotate within a certain range (+/-3 degrees) to achieve automatic leveling in the braking process, and the pressure surface of the brake rod is ensured to be in surface contact with the side surface of the track to be accurately matched; the brake bar and the stress application lever are designed in a loose hinge mode, so that the stress application lever only bears to apply clamping pressure on the brake bar, the left and right movement of the brake bar is not limited by the load, the brake bar is slightly moved in the direction opposite to the wind direction after being stressed, and the resistance is transmitted to the gantry crane through the brake box plate to form windproof braking force.
(3) Positioning the floating beam: the positioning guide wheel installed on the electric rail clamping device is replaced, miniaturization is realized, the positioning arc surface of the positioning floating beam can directly fall on the surface of the steel rail after the braking unit descends, the braking surfaces of the two braking rods are ensured to be accurately aligned with the two side surfaces of the steel rail, the influence of size change difference caused by deviation of a gantry crane and abrasion of a cart travelling wheel is effectively eliminated, and accurate braking on the two side surfaces of the steel rail can be realized in each braking process; the braking unit and the braking box are designed in a separated mode, the braking unit can be lifted and separated from the track conveniently when in a non-working state, the influence and the interference of the windproof device on the walking of the cart are reduced, and the braking unit can be prevented from being damaged by sundries on two sides of the steel rail.
(4) Suspension hoist mechanism: adopt nimble reliable flexible design, when hoist normal operating, suspension hoist mechanism can promote the braking unit and take in the braking incasement portion, avoids being by the collision of barrier on the track, when needing prevent wind the braking, and the braking unit relies on self weight to fall to the track face, accomplishes the braking process under electric, hydraulic unit's control.
(5) Compressing the oil cylinder by the externally-hung spring: the rail clamping device is different from a mode that the electric rail clamping device provides braking force by a spring set, changes a hydraulic pushing opening braking mode into a hydraulic pushing closing braking mode, further realizes miniaturization, and realizes mechanical/electric closed-loop control of the whole braking process by controlling the braking process in the whole process of an electric and hydraulic control system; the hydraulic control system has the function of linearly adjusting the oil pressure of the brake oil cylinder, and ensures that the gantry crane realizes smooth braking in dynamic windproof strong braking (gradually increasing the oil pressure of the brake oil cylinder and ensuring stable transition under the strong braking of the gantry crane); and thirdly, by additionally arranging an oil pressure detection and compensation device, the clamping force is ensured to be always kept in a set range, an automatic oil pressure supplementing function is realized (by monitoring the slow descending amount of a spring or oil pressure), an oil pressure oil supply system can be automatically started to increase the oil pressure for a wind prevention system so as to compensate the descending oil pressure, and the oil pressure in the static wind prevention brake is kept higher than the set oil pressure in a certain range.
(6) Trapezoidal bolt subassembly: when the hydraulic driving unit has a fault, the trapezoidal bolt is rotated manually, the thrust sleeve extends rightwards through the center hole of the thrust positioning plate and is contacted with the plunger of the brake cylinder, the upper part of the brake beam is opened along with the increase of the rotation amount, the brake rod is close to the two sides of the steel rail, the manual braking effect is finally formed, and the maximum friction force is larger than or equal to 50 KN.
(7) A return spring assembly: when the brake unit removes the brake, under the action of the return spring, the upper parts of the two brake beams are narrowed, the brake oil cylinders retract into the brake oil cylinders under the compression of the brake frame, and the two brake rods are also separated from the two sides of the steel rail and are separated from the left side and the right side by 10 mm.
(8) An emergency power supply: power may be provided when the external power source is interrupted.
Third, the working principle
(1) Dynamic braking: when a driver finds that the gantry crane is blown by strong wind (or the wind-proof function is automatically started after an automatic anemometer and an automatic cart run to measure the speed) in the operation, the driver immediately presses a button of the strong wind-proof braking system, the gantry crane enters a strong wind-proof braking state, the common wind-proof braking system of the gantry crane works at the moment, the cart driving wheels of the gantry crane are completely braked, the friction resistance between the driving wheels and the steel rails is changed into sliding friction from rolling friction, and the wind-proof capability of the 36t common gantry crane can reach 6-level wind. Meanwhile, the bar type strong wind prevention rail brake system also starts to be started, a circuit is connected, an oil pump rotates, an oil return valve of a lifting oil cylinder is connected, under the action of gravity, a brake frame quickly descends to a rail surface, after the system detects that the brake frame descends to the proper position, a control valve of the brake system is connected subsequently, the oil pump supplies oil to the brake oil cylinder and an externally-hung spring oil pressure adjusting oil cylinder simultaneously, a brake bar is pushed by a brake beam to quickly approach to two sides of a rail, along with the gradual rise of the oil pressure (due to the action of the spring compressing oil cylinder, the oil pressure is increased along with the compression amount of the spring), the friction force between the brake bar and the side surface of a steel rail is also gradually increased, under the action of friction resistance, the brake bar and a brake box have small-amplitude relative displacement (a preset gap is designed), the box body moves along the wind and then is tightly abutted against the end part of the brake bar, and at the moment, the friction resistance between, along with the rise of the oil pressure, the friction resistance of the strong wind is larger, and the sliding speed of the gantry crane is gradually reduced or stopped under the action of the strong wind prevention braking system. Assuming that the gantry crane can achieve the purpose of stopping stably under the adjusted static wind-proof set oil pressure, the strong wind-proof braking system is automatically converted into a static braking mode; assuming that the gantry crane still cannot be stopped stably under the set static strong wind resistant oil pressure (the conclusion is obtained by detecting the running speed of the large vehicle), the oil pressure of the side system continues to rise, after the spring adjusting oil cylinder rises to the highest limit value, the oil pressure rises to the set highest limit value, at the moment, the single set of wind resistant friction resistance is not less than 200KN, and the wind resistance of the ordinary gantry crane below 36t provided with the bar type strong wind resistant rail braking system (two-point installation) is greater than 13 grades of wind.
(2) Static braking: after the driver stops working, a button of the strong wind prevention braking system is pressed, a circuit of the strong wind prevention braking system is switched on, an oil pump rotates, an oil circuit of a brake frame lifting control valve is switched on, the brake frame quickly descends onto a track under the action of gravity of the brake frame, after system detection and confirmation, a control valve of a brake oil cylinder is opened, the oil pump simultaneously supplies oil to the brake oil cylinder and a spring compression oil cylinder, and after a calibrated oil pressure is reached, the system is closed and an automatic monitoring control link is converted.
(3) The friction resistance transmission path of the bar type strong wind prevention rail brake system is as follows: brake bar-brake box-gantry crane.
(4) Braking process of the braking unit: after the brake unit falls to the surface of a steel rail, the oil pump supplies oil to the brake oil cylinder and the spring compression oil cylinder simultaneously, as the oil supply amount is increased, the plunger of the brake oil cylinder extends out, the upper part of the brake beam is gradually opened under the condition of overcoming the tension of the return spring, the brake rods are also slowly close to the two sides of the steel rail, the oil pressure of the oil supply is not high at the moment, when the brake rods lean against the two sides of the steel rail, the spring compression oil cylinder starts to work and gradually compresses the pressure adjusting spring, the oil pressure can rise along with the compression of the spring, the posture of the two brake rods is automatically adjusted in the process, the brake surfaces of the brake rods are basically ensured to be in surface contact with the side surfaces of the steel rail, when the pressure adjusting spring is compressed to a set position.
(5) Pressure regulation and control function of spring compression oil cylinder
Pressure regulation during dynamic braking: when the system is in a dynamic braking process, the thrust of the brake oil cylinder is adjusted along with the spring, the oil pressure of the system is gradually increased along with the fact that the spring is continuously compressed by the spring compression oil cylinder, the thrust of the brake oil cylinder is increased along with the increase of the oil pressure, and the thrust is increased along with the compression of the spring to achieve the purpose of smooth braking.
Pressure regulation during static braking: when the system is in static braking, if systematic leakage occurs at the moment, the spring slightly extends and causes the oil pressure of the adjusting oil cylinder to slightly decrease due to the action of the spring on the oil cylinder, the braking oil cylinder can still keep higher oil pressure, the problem of braking failure caused by the cliff type decrease of the oil pressure is effectively prevented, when the oil pressure of the adjusting oil cylinder is close to or slightly lower than the set minimum guaranteed oil pressure due to leakage, the braking system is automatically started, the oil pump replenishes oil for the oil pressure system, the oil pressure of the adjusting oil cylinder returns to the highest set oil pressure, and the braking system automatically restores to the strongest static braking state.
Fourth, system advantages
The technical effects are as follows:
(1) and (4) miniaturization. Because the positioning guide wheel and the braking spring set of the windproof device of the existing rail clamping device are eliminated, the geometric internal space size of the braking unit is controlled within 300mm × 450m × 750mm, the mass is controlled below 250Kg, and the volume and the weight are both reduced by 1/2 compared with the existing electric rail clamping device; the manufacturing cost is saved; the brake box has smaller size, simple and convenient and quick installation, lower requirement on the installation position of the gantry crane, lower requirement on the installation condition and optimal cost performance in various externally-hung strong wind prevention devices of the conventional gantry crane, and a matched hydraulic control system can be arranged at any place near a cart trolley of the gantry crane.
(2) The full-automatic one-key control, install and remove labour saving and time saving. The system can be installed and removed by one person by a driver, the system is designed with a PLC monitoring function, the running speed, the wind speed and the braking force in the braking process are fed back to a processor of the PLC, the braking force curve is adjusted in time, the externally-hung spring compression oil cylinder can ensure that the oil pressure of the braking oil cylinder is gradually and linearly improved, the portal crane can be ensured to be smooth and stable in the dynamic strong wind prevention braking process, the impact caused by the portal crane in the strong braking process is effectively eliminated, and the strong wind prevention braking is safe and controllable.
(3) The clamping force is always kept within the set range in the whole windproof process. After the external hanging brake is finished, the system maintains the braking force within a set value by means of the pressure regulating spring, and during the windproof brake, the compensation function of the pressure regulating spring keeps the braking force within a set range.
Safety and economic effects:
(1) the strong wind prevention braking system has dynamic and static braking force calibrated according to design requirements (the braking force can be achieved by adjusting oil supply pressure within a designed maximum braking force range), can be popularized to a standard type wind prevention system for preventing a gantry crane (including other low-speed track machinery operating in the open air) from being blown by wind, has a one-key starting or automatic control function, can implement strong wind prevention braking at any position on a whole-course traveling line, and theoretically can achieve the function of preventing the gantry crane from being moved by strong wind of all levels (the strong wind prevention braking force (more than or equal to 13-level wind) by increasing the structural size, increasing the oil pressure and increasing braking points.
(2) The strong wind prevention braking system has the advantages that except for an anchoring mode (special strong typhoon prevention), the best braking system of all existing wind prevention brakes in the wind prevention system of the existing crane is compared with the wind prevention devices of manual rail clamping devices, fixed point type wind prevention bolts (plates), electric rail clamping devices and other types, the wind prevention devices are lower in efficiency, unknown in wind prevention grade, and do not have a dynamic braking function and the like in installation and removal.
(3) The system is simple and quick in mechanical installation, can be fixed on a cart walking trolley of the portal crane through simple bolt connection, has little mechanical influence on the portal crane, is simple and quick in system installation, has good economical efficiency and is suitable for comprehensive popularization and use.
Claims (4)
1. A bar type strong wind prevention rail braking system is characterized by comprising a braking unit, wherein the braking unit mainly comprises a braking bar, a braking frame, a braking oil cylinder mechanism, a trapezoidal bolt assembly and a return spring assembly; the brake bar comprises two bar type brake blocks which are arranged symmetrically left and right; the brake frame comprises two positioning floating beams, two brake beams and two brake pins, wherein the two brake beams are arranged symmetrically left and right, and the two brake beams are connected and installed on the two positioning floating beams through the two brake pins;
the front and rear outermost beam plates of the positioning floating beam are provided with positioning protruding blocks, and the lowest part of each protruding block is a positioning semi-arc surface; the brake beam is provided with a brake oil cylinder mechanism, a trapezoidal bolt assembly and a return spring assembly at the upper half part of the positioning floating beam, and two rod type brake blocks are respectively arranged at the lower half part of the positioning floating beam through a brake rod fixing plate; the brake oil cylinder mechanism is formed by serially connecting a brake oil cylinder, an oil cylinder fixing frame, a thrust positioning frame and a thrust positioning plate, the brake oil cylinder is arranged on the oil cylinder fixing frame, the right end of the oil cylinder fixing frame is connected with the upper part of the right brake beam through a support clamping plate, and the left end of the oil cylinder fixing frame is connected with the upper part of the left brake beam through the thrust positioning frame and the thrust positioning plate through the support clamping plate; the outer side of the brake beam is provided with a trapezoidal bolt assembly, the trapezoidal bolt assembly comprises a trapezoidal nut seat, a trapezoidal bolt, a thrust sleeve and two fixing pins, the trapezoidal bolt is installed in the trapezoidal nut seat, the thrust sleeve is installed on the head of the trapezoidal bolt and connected with a thrust positioning frame, the trapezoidal nut seat is installed in the hollow space of the left brake frame through the two fixing pins, and the axial lead of the trapezoidal bolt is overlapped with the axial lead of the thrust of the brake oil cylinder mechanism; the two brake beams are arranged on the left brake beam and the right brake beam respectively, the adjusting seat is arranged on the outer side of the mounting column at the top of the right brake beam, the two adjusting bolts are arranged on the adjusting seat, and two ends of the tension spring are fixed on the mounting column and the adjusting bolts respectively.
2. The bar type strong wind prevention rail brake system according to claim 1, further comprising a hydraulic driving unit, wherein the hydraulic driving unit mainly comprises a brake cylinder, a spring compression cylinder and a pressure adjusting spring, and the spring compression cylinder is connected with the brake cylinder through an oil path.
3. The bar type strong wind prevention rail braking system according to claim 1, further comprising a suspension lifting mechanism, wherein the suspension lifting mechanism mainly comprises a lifting cylinder and a lifting plate, the lower end of the lifting plate is connected with two positioning floating beams, and the upper end of the lifting plate is connected with the lifting cylinder through a connecting plate.
4. The bar type strong wind proof rail brake system according to claim 1, further comprising a brake case in which the brake unit is installed, and a housing case placed on the brake case and in which the hoist cylinder is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022104517.9U CN213416035U (en) | 2020-09-23 | 2020-09-23 | Bar type strong wind prevention rail braking system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022104517.9U CN213416035U (en) | 2020-09-23 | 2020-09-23 | Bar type strong wind prevention rail braking system |
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| CN213416035U true CN213416035U (en) | 2021-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022104517.9U Active CN213416035U (en) | 2020-09-23 | 2020-09-23 | Bar type strong wind prevention rail braking system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116605774A (en) * | 2023-07-17 | 2023-08-18 | 山东兴源机械有限公司 | Overhead bridge type overhead crane |
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2020
- 2020-09-23 CN CN202022104517.9U patent/CN213416035U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116605774A (en) * | 2023-07-17 | 2023-08-18 | 山东兴源机械有限公司 | Overhead bridge type overhead crane |
| CN116605774B (en) * | 2023-07-17 | 2023-10-20 | 山东兴源机械有限公司 | Overhead bridge type overhead crane |
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