Rod-type anti-strong wind track brake system

Abstract

The present invention discloses a rod-type strong-wind-proof rail brake system, comprising a brake unit primarily composed of a brake rod, a brake frame, a brake cylinder, and a trapezoidal bolt assembly. The system is compact and easy to install, with minimal impact on the mechanical properties of the gantry crane. Furthermore, it features high wind-proof braking force, smooth dynamic braking, simple and quick braking operation, and effective strong-wind-proof braking. This system provides a wind-proof braking measure for gantry cranes in the event of sudden strong winds while in operation and provides strong wind protection when not in operation, effectively addressing the need for effective strong-wind protection for gantry cranes both in operation and out of operation.

Description

Technical Field

[0001] The present invention belongs to an open-air track gantry crane (hereinafter referred to as a gantry crane) windproof braking system, and in particular relates to a rod-type strong wind-proof track braking system. Background Art

[0002] Gantry cranes are large loading and unloading equipment used in open-air railway freight yards. Due to their large windward area and high center of gravity, they present a safety risk of being blown out of control or even overturned by strong winds in windy conditions. The windbreak braking function (braking force) of existing rail gantry cranes in operation is determined by the kinetic friction between the crane's driving wheels and the rails, which is proportional to the crane's mass. For a typical gantry crane (36T, 26m span, 130t deadweight) as an example, the dynamic windbreak braking force is: 130T * 50% * 0.1 (the coefficient of sliding friction between the wheels and the rail) * 9.8 = 63.7 kN. Using the gantry crane design manual, calculations show that the thrust acting on the crane in a force 7.0 wind is 72.93 kN. This calculation indicates that existing dynamic windbreaks can only protect against force 6 winds. To protect against force 7 or higher, a windbreak system must be added. Furthermore, in areas with complex meteorological conditions, sudden strong winds often occur without warning, with wind speeds often increasing suddenly from level 2-3 to over level 10. This poses a significant safety hazard to gantry cranes, particularly those in operation. The applicant's employer has experienced numerous accidents caused by sudden strong winds blowing against gantry cranes. Although the gantry cranes involved were equipped with windbreaks and functioning properly, these accidents still resulted in significant economic losses.

[0003] At present, the external windproof devices used by gantry cranes at home and abroad include electric rail clamps, wheel brakes, windproof brake shoes, windproof ground anchors and other types.

[0004] (1) Electric rail clamp

[0005] This device is installed on the end face of the gantry crane trolley. Using a hydraulic cylinder or spring force, it pushes a lever to generate one to two times the clamping force, causing the clamp to clamp the rail, generating frictional resistance (windbreak braking force). This resistance is transmitted to the gantry crane trolley through the brake frame system, preventing the gantry crane's running gear from moving and providing windbreak. The electric rail clamp has a high clamping force, making it one of the strongest braking forces currently available for external windbreaks, and it also provides both dynamic and static braking functions. However, its technical drawbacks include the difficulty of achieving smooth braking. This type of windbreak device cannot precisely control the braking time and friction force during braking, causing the gantry crane to vibrate violently during dynamic windbreak braking, which poses uncertainty to the safety of the crane's hoisted cargo. Secondly, the surface of the clamp cannot maintain constant contact with the side of the rail during braking. Because the clamp brake pad is welded to the brake frame, when the perpendicularity between the rail and the wheel changes, the clamp's clamping surface lacks the ability to correct deviation and cannot form surface contact with the side of the rail. This small friction contact area ultimately affects the windbreak braking effect. Thirdly, the overall size is large, which has some adverse effects on the performance and structure of the gantry crane. To ensure sufficient clamping force and maintain high braking force over a long period of time, the design must be enlarged to accommodate a strong spring. This is why the external installation dimensions (length, width, and height) of electric rail clamps generally exceed 1500*800*1200.

[0006] (2) Wheel brakes

[0007] This device installs a spring-loaded brake on the brake wheel in the gantry crane's trolley motor drive system to brake the gantry crane's driving wheel for wind protection. This shifts the driving wheel's friction from rolling to sliding, increasing friction and achieving a wind-proof braking effect. The wheel brake windproof device provides intuitive wind protection, visible through wheel sliding or strong braking. However, its drawbacks include: First, its windproofing capability is weak. For example, braking half of the wheels (i.e., the driving wheels) generates wind resistance equal to 50% of the vehicle's weight x 0.1 (the coefficient of sliding friction between the wheels and the rails), effectively protecting against winds of force 6. Braking all wheels generates wind resistance equal to 0.1% of the vehicle's weight x 0.1, protecting against winds of force 9 but not force 10 or higher. Second, achieving all-wheel braking requires a significant number of additional braking devices (one set per passive gantry wheel) and requires significant changes to the gantry crane's running gear. This creates a mismatch between windproofing effectiveness and capital investment, resulting in a low cost-performance ratio.

[0008] (3) Windproof brake shoes

[0009] This device places arc-shaped wedges on the rails on either side of the gantry crane's wheels. When the gantry crane's trolley wheels roll and press against the iron shoes, the rolling friction between the trolley wheels and the rails is converted into sliding friction between the rails and the iron shoes. The resulting frictional resistance is roughly equivalent to that generated by wheel brakes. The windproof brake iron shoes offer a direct windproof effect, require minimal investment, and offer a reasonable cost-effectiveness. However, their technical drawbacks are: first, their windproofing capabilities are weak. Due to the structure of the gantry crane's trolley, the iron shoes can usually only be placed on one side of each gantry wheel. When the wind blows in one direction, only 50% of the wheels on the vehicle are effectively windproof, thus only protecting against winds of force 6. Among all external windproof devices, the windproofing capabilities of the windproof iron shoes are the weakest; second, if they are artificial iron shoes, they must be installed in advance before the gantry crane is affected by the wind, and require two assistants to install them simultaneously to be effective. If it is an electric iron shoe, each iron shoe must be equipped with a set of pushing mechanisms, and a larger installation space is required and the gantry crane trolley must be modified to a certain extent before the system can be installed. From the perspective of investment cost and windproof effect, it is a windproof device with low cost performance.

[0010] (4) Windproof anchor

[0011] This device sets up more than four fixed anchor points in the site, and connects the gantry crane to the anchor points through connections such as wire ropes, iron chains, and pins, so as to prevent the gantry crane from being blown away or overturned by the wind. The advantages of windproof ground anchors are strong windproof ability, anti-overturning function, and low subsequent maintenance costs; its disadvantages are: first, the installation and removal time is long, and many installers are required. Although it has strong windproof ability, it requires advance notification of relevant personnel and preparation of relevant tools during installation, which cannot meet the problem of immediate use in the face of impending strong winds. This measure is only applicable when a strong wind warning is issued; second, the design of the anchoring method lacks technical standards for each gantry crane, and the fixed parts of the anchor points are mostly buried under the site, which cannot be effectively detected. Therefore, there may be problems with uncertain anchoring force during specific implementation. Summary of the Invention

[0012] The technical problem to be solved by the present invention is to provide a rod-type strong-wind-proof track brake system which is small in size, easy to install, highly windproof and capable of achieving dynamic windproofing.

[0013] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0014] A rod-type anti-strong-wind rail brake system includes a brake unit, which is mainly composed of a brake rod, a brake frame, a brake cylinder mechanism, a trapezoidal bolt assembly and a return spring assembly; the brake rod includes two rod-type brake blocks symmetrically arranged on the left and right; the brake frame includes two positioning floating beams and two brake beams symmetrically arranged on the left and right and two brake pins, and the two brake beams are connected and installed on the two positioning floating beams through two brake pins; positioning protrusions are designed on the front and rear outermost beam plates of the positioning floating beams, and the bottom of the protrusions is a positioning semi-arc surface; the brake beam is equipped with a brake cylinder mechanism, a trapezoidal bolt assembly and a return spring assembly on the upper half of the positioning floating beam, and two rod-type brake blocks are respectively installed on the lower half of the positioning floating beam through a brake rod fixing plate; the brake cylinder mechanism is composed of a brake cylinder, a cylinder fixing frame, a thrust positioning frame and a thrust positioning plate connected in series, the brake cylinder is installed on the cylinder fixing frame, and the right end of the cylinder fixing frame is supported by a support The clamping plate is connected to the upper part of the right brake beam, and the left end of the cylinder fixing frame is connected to the upper part of the left brake beam through the thrust positioning frame and the thrust positioning plate through the supporting clamping plate; a trapezoidal bolt assembly is provided on the outside of the brake beam; the trapezoidal bolt assembly includes 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 trapezoidal bolt head and connected to the thrust positioning frame, the trapezoidal nut seat is installed in the inner space of the left brake frame through two fixing pins, and the axis of the trapezoidal bolt coincides with the thrust axis of the brake cylinder mechanism; a return spring assembly is connected between the top ends of the left and right brake beams, and the return spring assembly consists of two tension springs, two mounting columns, an adjusting seat and two adjusting bolts. The two mounting columns are respectively installed on the tops of the left and right brake beams, and the adjusting seat is installed on the outside of the mounting column at the top of the right brake beam. The two adjusting bolts are installed on the adjusting seat, and the two ends of the tension spring are respectively fixed on the mounting column and the adjusting bolt.

[0015] The above-mentioned rod-type strong wind-proof track brake system also includes a hydraulic drive unit, which is mainly composed of a brake cylinder, a spring compression cylinder, and a pressure regulating spring. The spring compression cylinder is connected to the brake cylinder through an oil circuit.

[0016] The above-mentioned rod-type strong wind-proof rail braking system also includes a suspended lifting mechanism, which is mainly composed of a lifting cylinder and a hanging plate. The lower end of the hanging plate is connected to two positioning floating beams, and the upper end of the hanging plate is connected to the lifting cylinder through a connecting plate, which is used to protect the braking unit in a non-working state.

[0017] The rod-type strong wind-proof track brake system further comprises a brake box and an outer cover box, the brake unit is installed in the brake box, the outer cover box is placed on the brake box, and the lifting cylinder is installed in the outer cover box.

[0018] To address the current issues with wind-resistant braking systems for gantry cranes, the inventors have designed and manufactured a rod-type, high-wind-resistant rail brake system. The system comprises a brake unit, primarily composed of a brake rod, a brake frame, a brake cylinder, and a trapezoidal bolt assembly. This system is compact, easy to install, and has minimal impact on the mechanical performance of the gantry crane. It also features high wind-resistant braking force, smooth dynamic braking, simple and quick braking operation, and effective high-wind-resistant braking. This system effectively protects gantry cranes from sudden strong winds while in operation and from strong winds when not in operation. This effectively addresses the need for gantry cranes (including low-speed rail-mounted machinery such as chain bucket coal unloaders) to effectively protect against strong winds (including sudden strong winds) both during operation and during non-operation. Research has shown that the brake caliper of the present invention has a maximum clamping force of 600 kN, and two sets of the wind-resistant system can generate a wind-resistant frictional resistance of 400 kN or higher. This system can improve the protection level of existing dynamic wind-resistant systems commonly used on ordinary gantry cranes from level 6 to level 13, thereby better protecting operators and equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the brake unit of the rod-type strong wind protection track brake system of the present invention.

[0020] Figure 2 It is a schematic diagram of the hydraulic drive unit of the rod-type strong wind protection track brake system of the present invention.

[0021] Figure 3 It is a schematic diagram of the trapezoidal bolt assembly of the rod-type strong wind protection track brake system of the present invention.

[0022] Figure 4 It is a schematic diagram of the suspension lifting mechanism of the rod-type strong wind protection track braking system of the present invention.

[0023] Figure 5 It is a schematic diagram of the use state of the rod-type strong wind protection track brake system of the present invention.

[0024] Figure 6 This is a diagram showing the final braking effect of the rod-type strong wind-proof track braking system of the present invention.

[0025] In the figure: 1. brake rod, 2. brake rod fixing plate, 3. left brake beam, 4. right brake beam, 5. positioning floating beam, 6. brake frame pin, 7. brake cylinder, 8. cylinder fixing frame, 9. thrust positioning frame, 10. thrust positioning plate, 11. trapezoidal bolt assembly, 12. support card plate 1, 13. support card plate 2, 14. return spring assembly, 15. hanging plate, 16. connecting plate, 17. lifting cylinder, 18. brake box, 19. outer cover box, 20. spring compression cylinder, 21 pressure adjusting spring, 22. oil circuit, 23. thrust sleeve, 24. pin, 25. trapezoidal nut seat, 26. trapezoidal bolt, 27 rail, 28 wind direction, 29 brake box end plate, 30 external control oil circuit inlet (outlet). DETAILED DESCRIPTION

[0026] 1. Basic structure

[0027] The rod-type anti-strong-wind track brake system includes a brake unit, a hydraulic drive unit, a suspended lifting mechanism, and a brake box and an outer cover box containing the aforementioned mechanisms. The brake unit is installed in the brake box, the outer cover box is placed on the brake box, and the lifting cylinder is installed in the outer cover box.

[0028] The brake unit mainly consists of a brake rod, a brake frame, a brake cylinder mechanism, a trapezoidal bolt assembly and a return spring assembly; the brake rod includes two rod-type brake blocks that are symmetrically arranged on the left and right;

[0029] The brake frame includes two positioning floating beams, two brake beams and two brake pins arranged symmetrically on the left and right. The two brake beams are connected and installed on the two positioning floating beams through the two brake pins. Positioning protrusions are designed on the front and rear outermost beam plates of the positioning floating beams, and the bottom of the protrusions is a positioning semi-arc surface. The brake beam is equipped with a brake cylinder mechanism, a trapezoidal bolt assembly and a return spring assembly on the upper half of the positioning floating beam, and two rod-type brake blocks are respectively installed on the lower half of the positioning floating beam through a brake rod fixing plate.

[0030] The brake cylinder mechanism is composed of a brake cylinder, a cylinder fixing frame, a thrust positioning frame and a thrust positioning plate connected in series. The brake cylinder is installed on the cylinder fixing frame. The right end of the cylinder fixing frame is connected to the upper part of the right brake beam through a support card plate. The left end of the cylinder fixing frame is connected to the upper part of the left brake beam through the thrust positioning frame and the thrust positioning plate through a support card plate.

[0031] A trapezoidal bolt assembly is provided on the outside 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 to the thrust positioning frame. The trapezoidal nut seat is installed in the inner space of the left brake frame through two fixing pins, and the axis of the trapezoidal bolt coincides with the thrust axis of the brake cylinder mechanism.

[0032] A return spring assembly is connected between the top of the left and right brake beams. The return spring assembly consists of two tension springs, two mounting columns, an adjustment seat and two adjusting bolts. The two mounting columns are respectively installed on the top of the left and right brake beams, and the adjusting seat is installed on the outside of the mounting column at the top of the right brake beam. The two adjusting bolts are installed on the adjusting seat, and the two ends of the tension spring are respectively fixed on the mounting column and the adjusting bolts.

[0033] The hydraulic drive unit is mainly composed of a brake cylinder, a spring compression cylinder, and a pressure regulating spring. The spring compression cylinder is connected to the brake cylinder through an oil circuit.

[0034] The suspended lifting mechanism is mainly composed of a lifting cylinder and a hanging plate. The lower end of the hanging plate is connected to two positioning floating beams, and the upper end of the hanging plate is connected to the lifting cylinder through a connecting plate, which is used to protect the brake unit in the non-working state.

[0035] II. Organizational Functions

[0036] (1) Brake box: It has a compact structure and an internal size of about 300mm*450mm*750mm, which contains the main components of the brake unit.

[0037] (2) Rod brake pad: The rod brake pad is hung at the bottom of the brake clamp in an articulated manner. Relative to the center of the brake rod clamping arc fulcrum, the brake rod can be flexibly rotated within a certain range (±3°) to achieve automatic leveling during the braking process, ensuring that the pressure surface of the brake rod and the side of the track always maintain surface contact for precise matching; the brake rod and the boosting lever are designed in a loose articulated manner to ensure that the boosting lever only bears the burden of applying clamping pressure to the brake rod and does not bear the burden of restricting the left and right movement of the brake rod, so that the brake rod will move slightly in the opposite direction of the wind after being subjected to force, and transmit the resistance to the gantry crane through the brake box plate to form a windproof braking force.

[0038] (3) Positioning floating beam: It replaces the positioning guide wheel installed on the electric rail clamp and realizes miniaturization. The positioning arc surface of the positioning floating beam will fall directly on the surface of the rail after the brake unit is lowered, ensuring that the braking surfaces of the two brake rods are accurately aligned with the two sides of the rail, effectively eliminating the impact of dimensional changes caused by the deviation of the gantry crane and the wear of the trolley running wheels, so that each braking process can achieve precise braking on both sides of the rail; the brake unit and the brake box adopt a separate design, which makes it convenient to lift the brake unit and disengage it from the track when it is not in working state, reducing the impact and interference of the windproof device on the trolley movement, and preventing the brake unit from being damaged by debris on both sides of the rail.

[0039] (4) Suspended lifting mechanism: It adopts a flexible and reliable telescopic design. When the crane is operating normally, the suspended lifting mechanism can lift the brake unit and store it inside the brake box to avoid collision with obstacles on the track. When windproof braking is required, the brake unit falls to the track surface by its own weight and completes the braking process under the control of the electrical and hydraulic units.

[0040] (5) External spring compression cylinder: First, it is different from the electric rail clamp that uses a spring group to provide braking force. It changes the hydraulic push opening braking method into a hydraulic push closing braking method, which further realizes miniaturization. The braking process is fully controlled by the electrical and hydraulic control system, realizing the mechanical / electrical closed-loop control of the entire braking process; second, it has the function of linearly adjusting the oil pressure of the brake cylinder to ensure that the gantry crane can achieve smooth braking in dynamic windproof strong braking (gradually increase the oil pressure of the brake cylinder to ensure a smooth transition under strong braking of the gantry crane); third, by adding an oil pressure detection and compensation device, it ensures that the clamping force is always kept within the set range, and has an automatic oil pressure replenishment function (by monitoring the slow drop in the spring or oil pressure), which can automatically start the oil pressure supply system to increase the oil pressure to the windproof system to compensate for the dropped oil pressure. The oil pressure in static windproof braking is kept higher than the set oil pressure within a certain range.

[0041] (6) Trapezoidal bolt assembly: When the hydraulic drive unit fails, the trapezoidal bolt is rotated manually. At this time, the thrust sleeve extends to the right through the center hole of the thrust positioning plate and contacts the brake cylinder plunger. As the rotation amount increases, the upper part of the brake beam opens, the brake rod approaches the two sides of the rail and finally forms a manual braking effect, with a maximum friction force of ≥50KN.

[0042] (7) Return spring assembly: When the brake unit is released, the upper part of the two brake beams narrows under the action of the return spring, and the brake cylinder retracts into the brake cylinder under the compression of the brake frame. The two brake rods also break away from the two sides of the rail and are separated by 10 mm on both sides.

[0043] (8) Emergency power supply: can provide power when the external power supply is interrupted.

[0044] 3. Working Principle

[0045] (1) Dynamic braking: When the driver finds that the gantry crane is blown by strong wind during operation (or the automatic anemometer or automatic trolley speed measurement automatically starts the wind protection function), he immediately presses the button of the strong wind protection braking system, and the gantry crane enters the strong wind protection braking state. At this time, the ordinary wind protection braking system of the gantry crane works, and the driving wheels of the gantry crane are all braked. The friction resistance between the driving wheels and the rails changes from rolling friction to sliding friction. The wind protection capability of a 36t ordinary gantry crane can reach level 6 wind. At the same time, the rod-type anti-strong-wind rail brake system also starts to operate. The circuit is connected, the oil pump starts to rotate, and the return valve of the lifting cylinder is connected. Under the action of gravity, the brake frame quickly descends to the rail surface. After the system detects that the brake frame has landed in place, the brake system control valve is then connected. The oil pump supplies oil to the brake cylinder and the external spring oil pressure regulating cylinder at the same time. Pushed by the brake beam, the brake rod quickly approaches the two sides of the track. As the oil pressure gradually increases (due to the effect of the spring compressing the cylinder, the oil pressure increases with the amount of spring compression), the friction between the brake rod and the side of the rail also gradually increases. Under the action of frictional resistance, the brake rod and the brake box have a small relative displacement (the gap reserved by the design). After moving downwind, the box is tightly pressed against the end of the brake rod. At this time, the frictional resistance between the brake rod and the side of the rail is also transmitted to the gantry crane through the box, forming a strong wind resistance. As the oil pressure increases, the frictional resistance against strong winds also increases. Under the action of the strong wind braking system, the gantry crane's sliding speed gradually decreases or stops. Assuming that the gantry crane can come to a steady stop under the set oil pressure of the adjusted static wind protection, the anti-strong wind braking system will automatically switch to the static braking mode; assuming that the gantry crane still cannot come to a steady stop under the set static anti-strong wind oil pressure (the conclusion drawn through the trolley driving speed detection), the side system oil pressure continues to increase, and after the spring adjustment cylinder rises to the maximum limit value, the oil pressure rises directly to the set maximum limit value. At this time, the friction resistance of a single set of wind protection is ≧200KN, and the wind protection capability of ordinary gantry cranes below 36t equipped with a rod-type anti-strong wind rail braking system (two-point installation) will be greater than level 13 wind.

[0046] (2) Static braking: After the driver stops working, he presses the button of the anti-strong-wind braking system, the circuit of the anti-strong-wind braking system is opened, the oil pump rotates, and the oil circuit of the brake frame lifting control valve is connected. Under the action of the brake frame's gravity, the brake frame quickly descends to the track. After system detection and confirmation, the brake cylinder control valve is opened, and the oil pump supplies oil to the brake cylinder and the spring compression cylinder at the same time. After reaching the calibrated oil pressure, the system is closed and switched to the automatic monitoring and control link.

[0047] (3) The friction resistance transmission path of the rod-type anti-strong wind rail brake system: brake rod - brake box - gantry crane.

[0048] (4) Braking process of the brake unit: After the brake unit falls onto the rail surface, the oil pump supplies oil to the brake cylinder and the spring compression cylinder at the same time. As the oil supply increases, the brake cylinder plunger extends, and the upper part of the brake beam gradually opens while overcoming the tension of the return spring. The brake rod also slowly approaches the two sides of the rail. At this time, the oil supply pressure is not high. When the brake rod is close to the two sides of the rail, the spring compression cylinder starts to work and gradually compresses the pressure regulating spring. The oil pressure will increase as the spring is compressed. During this process, the two brake rods automatically adjust their posture to basically ensure that the braking surface of the brake rod is in surface contact with the side of the rail. When the pressure regulating spring is compressed to the set position, the brake unit completes the braking process. At this time, the oil pressure is the high value during static braking.

[0049] (5) Pressure control function of spring compression cylinder

[0050] Pressure regulation function during dynamic braking: When the system is in the dynamic braking process, the thrust of the brake cylinder is adjusted as the spring compresses the spring. The cylinder continuously compresses the spring and gradually increases the system oil pressure. The increase in oil pressure pushes up the thrust of the brake cylinder. The thrust increases with the compression of the spring and achieves the purpose of smooth braking.

[0051] Pressure regulation function during static braking: When the system is in static braking, if systemic leakage occurs at this time, due to the action of the spring compressing the oil cylinder, the spring will stretch slightly and cause the oil pressure in the regulating cylinder to drop slightly. The brake cylinder can still maintain a relatively high oil pressure, effectively preventing the oil pressure from dropping sharply and causing brake failure. When the leakage causes the oil pressure in the regulating cylinder to approach or slightly fall below the set minimum guaranteed oil pressure, the braking system will automatically start, the oil pump will replenish oil to the oil pressure system, the oil pressure in the regulating cylinder will return to the highest set oil pressure, and the braking system will automatically restore the strongest static braking state.

[0052] 4. System Advantages

[0053] Technical effects:

[0054] (1) Miniaturization. By eliminating the positioning guide wheel and brake spring assembly of the existing rail clamp windproof device, the geometric internal dimensions of the brake unit are controlled within 300mm*450m*750mm, and the mass is controlled below 250Kg. The volume and weight are reduced by 1 / 2 compared with the existing electric rail clamp, saving production costs. The brake box is small in size, easy and quick to install, and has low requirements for the installation location of the gantry crane. The supporting hydraulic control system can be installed anywhere near the gantry crane trolley, with low requirements for installation conditions. It has the best cost-effectiveness among all types of existing external strong wind protection devices for gantry cranes.

[0055] (2) Fully automatic one-button control, saving time and effort in installation and removal. The system installation and removal can be completed by the driver alone. The system is designed with a PLC monitoring function. The running speed, wind speed, and braking force during the braking process are fed back to the PLC processor, and the braking force curve is adjusted in time. The external spring compression cylinder can ensure that the oil pressure of the brake cylinder increases gradually and linearly, which can ensure the smoothness and stability of the gantry crane during the dynamic anti-strong wind braking process, effectively eliminate the impact caused by the gantry crane during strong braking, and make the strong wind braking safe and controllable.

[0056] (3) The clamping force remains within the set range throughout the entire windbreak process. After the external brake is completed, the system relies on the pressure-regulating spring to maintain the braking force within the set value. During the windbreak braking period, the compensation function set by the pressure-regulating spring keeps the braking force within the set range.

[0057] Safety and economic effects:

[0058] (1) The anti-strong-wind braking system has dynamic and static braking forces calibrated according to design requirements (achieved by adjusting the oil supply pressure within the design maximum braking force range). It can be promoted as a standard wind-proof system for gantry cranes (including other low-speed rail machinery operating in the open air) to prevent them from being blown by the wind. It has a one-button start or automatic control function and can implement anti-strong-wind braking at any position along the entire running line. The powerful anti-strong-wind braking force (≥ level 13 wind) can theoretically prevent the gantry crane from being blown by all levels of strong wind (which can be easily achieved by increasing the structural size, increasing the oil pressure and adding braking points).

[0059] (2) This anti-strong wind braking system has the best braking system among all the currently used wind-proof brakes in the current crane wind-proof system, except for the anchoring method (specially for strong typhoon protection). Compared with manual rail clamps, fixed-point wind-proof bolts (plates), electric rail clamps and other types of windbreakers, which have low efficiency in installation and removal, unclear wind protection level, and no dynamic braking function, this system has high efficiency in installation and removal, and has calibrated dynamic and static dual-condition strong wind protection capabilities. In addition to ensuring the wind-proof safety of gantry cranes, it can also improve the operating response time of gantry cranes and reduce the input of auxiliary personnel.

[0060] (3) The system is easy and quick to install mechanically. It can be fixed on the trolley of the gantry crane by simple bolt connection. It has minimal mechanical impact on the gantry crane. The system is easy and quick to install, has good economy and is suitable for comprehensive promotion and use.

Claims

1. A rod-type anti-strong wind track brake system, characterized in that It includes a brake unit, a hydraulic drive unit, and a suspended lifting mechanism. The brake unit is mainly composed of a brake rod, a brake frame, a brake cylinder mechanism, a trapezoidal bolt assembly, and a return spring assembly. The brake rod includes two rod-type brake blocks symmetrically arranged on the left and right. The brake frame includes two positioning floating beams and two brake beams symmetrically arranged on the left and right and two brake pins. The two brake beams are connected and installed on the two positioning floating beams through two brake pins. The front and rear outermost beam plates of the positioning floating beam are designed with positioning protrusions, and the bottom of the protrusions is a positioning semi-circular. Arc surface; the brake beam is equipped with a brake cylinder mechanism, a trapezoidal bolt assembly and a return spring assembly in the upper half of the positioning floating beam, and two rod-type brake blocks are installed respectively in the lower half of the positioning floating beam through the brake rod fixing plate; the brake cylinder mechanism is composed of a brake cylinder, a cylinder fixing frame, a thrust positioning frame and a thrust positioning plate in series, the brake cylinder is installed on the cylinder fixing frame, the right end of the cylinder fixing frame is connected to the upper part of the right brake beam through the support card, and the left end of the cylinder fixing frame is connected to the left brake through the thrust positioning frame and the thrust positioning plate through the support card. The upper part of the beam; a trapezoidal bolt assembly is provided on the outside of the brake beam, and the trapezoidal bolt assembly includes a trapezoidal nut seat, a trapezoidal bolt, a thrust sleeve and two fixing pins. The trapezoidal bolt is installed in the trapezoidal nut seat, and the thrust sleeve is installed on the trapezoidal bolt head and connected to the thrust positioning frame. The trapezoidal nut seat is installed in the inner space of the left brake frame through two fixing pins. The axis of the trapezoidal bolt coincides with the thrust axis of the brake cylinder mechanism; a return spring assembly is connected between the top ends of the two brake beams, and the return spring assembly includes a tension spring, a mounting column and an adjustment seat. and adjusting bolts, the two mounting columns are respectively installed on the top of the left and right brake beams, the adjusting seat is installed on the outside of the mounting column on the top of the right brake beam, the two adjusting bolts are installed on the adjusting seat, and the two ends of the tension spring are respectively fixed on the mounting column and the adjusting bolts; the hydraulic drive unit is mainly composed of a spring compression cylinder and a pressure adjusting spring, and the spring compression cylinder is connected to the brake cylinder through an oil circuit; the suspended lifting mechanism is mainly composed of a lifting cylinder and a hanging plate, the lower end of the hanging plate is connected to two positioning floating beams, and the upper end of the hanging plate is connected to the lifting cylinder through a connecting plate.

2. The rod-type anti-strong wind track brake system according to claim 1 is characterized in that It also includes a brake box and an outer cover box. The brake unit is installed in the brake box. The outer cover box is placed on the brake box. The lifting cylinder is installed in the outer cover box.

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