A lever balancing system for transverse movement of a bridge erecting machine and a control method thereof

Abstract

The invention discloses a bridge erecting machine, aiming to provide a lever balancing system and a control method for the bridge erecting machine to move horizontally over a width, which has high construction efficiency, short construction period, low cost, and a safe and reliable width-changing process. The key points of the technical scheme are that the main structure of the bridge erecting machine is a multi-section truss connecting beam, which is easy to disassemble and assemble, convenient for transfer on the construction site, can move horizontally in one time, has strong wind resistance, can ensure safe operation, and through the turntable function of the bridge erecting machine, the bridge erecting machine is controlled to move horizontally over a width between 0° and 45°, which is safe and reliable. Compared with the width-changing operation of the traditional bridge erecting machine, the time consumed is short, the cost required is low, and the efficiency of the horizontal movement is high. At the same time, the central control device and the infrared sensor cooperate with each other to realize the calculation of the force conditions on both sides of the bridge erecting machine, so that the bridge erecting machine has strong stability and safety during the process of moving horizontally over a width. The invention is applicable to the technical field of bridge construction equipment.

Description

Technical Field

[0001] The present invention relates to a bridge erecting machine, and more particularly to a lever balancing system for the transverse movement of the bridge erecting machine and a control method thereof. Background Art

[0002] In order to accommodate more people and vehicles and prevent congestion on the bridge deck, current bridges usually include two beams. During the bridge construction process, when the bridge erection machine completes the construction of one beam, it needs to move to the other beam. In traditional processes, the movement of the bridge erection machine usually includes the following three solutions:

[0003] The first option is to move the bridge erection machine forward along the erected bridge to the back of the platform below the line, and disassemble and turn around to move horizontally. The above option is greatly affected by the site, requires a longer length of the starting back of the platform, and takes a long time, which affects the construction period of the bridge;

[0004] The second option is to dismantle the bridge erection machine as a whole, and transfer the parts of the bridge erection machine to another cast-in-place bridge deck by crane and transport vehicle for reassembly. The above solution has cumbersome procedures and requires high costs.

[0005] Option three is to drive foundation piles in the water of the central isolation zone and set up two steel platforms with Bailey beams on them. The Bailey beams are used as transition support points for the bridge-building machine to move horizontally over the width. The above option has a large amount of engineering work and a high degree of difficulty, and the process is cumbersome. At the same time, it requires additional related disposal costs. In addition, it takes a long time to build the platform, which will delay the construction period. After the platform is built, the foundation bearing capacity needs to be tested. At the same time, there will be safety risks when the bridge-building machine moves horizontally over the width.

[0006] Therefore, a new bridge-erecting machine width-changing solution is needed, which will not be affected by the project site, has a short width-changing period, low cost and good safety. Summary of the invention

[0007] In view of the shortcomings of the prior art, the object of the present invention is to provide a lever balancing system and a control method for the transverse movement of a bridge erecting machine, which has high construction efficiency, short construction period, low cost, and safe and reliable width transition process.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a lever balancing system for the transverse movement of a bridge erecting machine, comprising two parallel main truss guide beams, a front temporary outrigger arranged at one end of the main truss guide beam, and a rear outrigger arranged at the other end of the main truss guide beam, wherein the front temporary outrigger and the rear outrigger are also provided with hydraulic devices, the front temporary outrigger and the rear outrigger are extended and retracted in the main truss guide beam through the hydraulic devices, and can support the entire bridge erecting machine with force, the lower end of the main truss guide beam is also provided with a front outrigger and a middle outrigger, and the front outrigger and the rear outrigger are also provided with a hydraulic device. A track beam is also provided at the bottom of the middle leg, and the front leg and the middle leg can slide along the track beam. Turntables are provided between the front leg and the main truss guide beam, and between the middle leg and the main truss guide beam. The turntable is used to adjust the overall rotation angle of the bridge-building machine. A transverse track is provided in the main truss guide beam, and at least two truss vehicles are provided on the transverse track. The truss vehicles are used to balance the load relationship of the bridge-building machine. A balancing device is also provided inside the main truss guide beam, and the balancing device is configured to maintain the overall balance of the bridge-building machine during the transverse movement of the bridge-building machine.

[0009] The present invention is further configured as follows: the balancing device includes an infrared sensor arranged on the main truss guide beam and a central control device which is communicatively connected to the infrared sensor, the infrared sensor is used to detect the specific positions of the front legs and the middle legs on the bridge-building machine and send the information to the central control device, the central control device is used to calculate the force conditions at both ends of the bridge-building machine fulcrum and control the truss vehicle to move to a specified position.

[0010] The present invention is further configured as follows: the bridge erecting machine transverse movement method of the lever balance system for the bridge erecting machine transverse movement comprises the following steps: S1, retracting the front temporary legs and the middle legs of the bridge erecting machine, controlling the bridge erecting machine to rotate an angle so that the bridge erecting machine and the bridge deck are at an angle of 30°, and preparing to move the front temporary legs over the width;

[0011] S2, move the bridge erection machine to make the front temporary outrigger reach the target width of the bridge deck, lower the front temporary outrigger, and prepare for the front outrigger to pass the width;

[0012] S3, retract the front outrigger, control the front outrigger to move to the target width of the bridge deck, then lower the front outrigger and prepare for the middle outrigger to cross the width;

[0013] S4, retract the middle outrigger, control the middle outrigger to move to the target width of the bridge deck, and then lower the middle outrigger;

[0014] S5. Retract the front temporary outriggers and control the bridge-erecting machine to rotate its angle so that the bridge-erecting machine slowly changes from a 30° angle with the current bridge deck to being parallel to the current bridge deck, thus completing the overall width transition of the bridge-erecting machine.

[0015] Preferably, the control method of the lever balance system for the transverse movement of the bridge erecting machine also includes a balance control method for the bridge erecting machine, including the following steps: S11, the central control device detects whether the front legs and the rear legs of the bridge erecting machine are both in a lowered support state, if so, jump to S12 to continue the detection, otherwise, jump to S15 to continue the detection;

[0016] S12, the infrared sensor detects the specific positions of the front outrigger and the middle outrigger on the bridge erecting machine, and determines the current fulcrum of the bridge erecting machine. At the same time, the infrared sensor detects the positions of the two gantry vehicles on the bridge erecting machine, and sends the information to the central control device;

[0017] S13, the central control device determines the force conditions at both ends of the fulcrum of the bridge erecting machine according to the position of the fulcrum of the bridge erecting machine and the position of the gantry vehicle, and determines that the force on the left side of the fulcrum is Gl, and the force on the right side of the fulcrum is Gr;

[0018] S14, the central control device determines the size of Gl and Gr. If Gl>Gr, the central control device controls the gantry vehicle to move rightward, and synchronously updates the data of Gl and Gr until Gl=Gr. If Gr>Gl, the central control device controls the gantry vehicle to move leftward, and synchronously updates the data of Gl and Gr until Gr=Gl.

[0019] S15, the central control device determines whether the front outrigger is supported and stressed. If so, it jumps to S16 to continue testing. Otherwise, it jumps to S19 to continue testing.

[0020] S16, the infrared sensor detects the specific position of the front outrigger on the bridge erecting machine and determines the current fulcrum of the bridge erecting machine. At the same time, the infrared sensor detects the positions of the two gantry vehicles on the bridge erecting machine and sends the information to the central control device;

[0021] S17, the central control device determines the force conditions at both ends of the fulcrum of the bridge erecting machine according to the position of the fulcrum of the bridge erecting machine and the position of the gantry vehicle, and determines that the force on the left side of the fulcrum is Gl, and the force on the right side of the fulcrum is Gr;

[0022] S18, the central control device determines the size of Gl and Gr. If Gl>Gr, the central control device controls the gantry vehicle to move rightward, and synchronously updates the data of Gl and Gr until Gl=Gr. If Gr>Gl, the central control device controls the gantry vehicle to move leftward, and synchronously updates the data of Gl and Gr until Gr=Gl.

[0023] S19, the infrared sensor detects the specific position of the middle outrigger on the bridge erecting machine and determines the current fulcrum of the bridge erecting machine. At the same time, the infrared sensor detects the positions of the two gantry vehicles on the bridge erecting machine and sends the information to the central control device;

[0024] S20, the central control device determines the force conditions at both ends of the fulcrum of the bridge erecting machine according to the position of the fulcrum of the bridge erecting machine and the position of the gantry vehicle, and determines that the force on the left side of the fulcrum is Gl, and the force on the right side of the fulcrum is Gr;

[0025] S21. The central control device determines the size of Gl and Gr. If Gl>Gr, the beam vehicle is controlled to move to the right, and the data of Gl and Gr are synchronously updated until Gl=Gr. If Gr>Gl, the beam vehicle is controlled to move to the left, and the data of Gl and Gr are synchronously updated until Gr=Gl.

[0026] Preferably, the force calculation formula on both sides of the bridge erection machine support is as follows:

[0027] G=L×Lg+Lh×T(1)

[0028] Among them, G is the pressure on one side of the bridge erection machine's fulcrum, L is the length of the main truss guide beam on that side, Lg is the mass of each unit length of the main truss guide beam, Lh is the distance between the truss car and the fulcrum on that side, and is 0 if there is no truss car on that side, and T is the mass of the truss car.

[0029] Preferably, the fulcrum of the bridge erecting machine is calculated as follows:

[0030]

[0031] Among them, L2 is the distance between the front support leg and the front temporary support leg, L3 is the distance between the middle support leg and the front temporary support leg, and L4 is the overall length of the main truss guide beam.

[0032] Preferably, the balance control method of the bridge erecting machine also includes the following steps: S22, the central control device receives the movement signal of the main truss guide beam and automatically adjusts the position of the truss vehicle.

[0033] Preferably, the balance control method of the bridge erecting machine further comprises the following steps: S23, the central control device determines the size of G1 and Gr, if If the rear end of the bridge erector is at risk of lifting, the temporary legs before the hydraulic device is lifted will bear the force on the bridge erector. It is judged that there is a risk of the front end of the bridge-building machine being lifted up, and after the hydraulic device is lifted up, the outriggers exert force on the bridge-building machine.

[0034] By adopting the above technical scheme, the main structure of the bridge-building machine is a multi-section truss connecting beam, which is easy to disassemble and assemble, convenient for transfer at the construction site, can be moved horizontally in one time, has strong wind resistance, can ensure safe operation, and through the turntable function of the bridge-building machine, the bridge-building machine is controlled to move horizontally between 0° and 45°, which is safe and reliable. Compared with the traditional bridge-building machine's width-changing operation, it takes less time, requires less cost, and has high efficiency of horizontal movement.

[0035] Furthermore, by arranging a truss car at the upper end of the bridge-erecting machine, the mass of the truss car allows the entire bridge-erecting machine to reach a lever balance state during the lateral movement, so that the masses of both sides of the front support leg and the middle support leg are the same, preventing uneven force on both ends of the bridge-erecting machine from causing one end to tilt, thereby causing a safety accident and causing casualties. At the same time, in order to realize the movement of the bridge-erecting machine, the front support leg and the middle support leg are slidably connected to the main truss guide beam, thereby realizing the movement of the bridge-erecting machine on the bridge deck when the support legs are under force. The turntable can control the offset angle of the bridge-erecting machine during the movement of the front support leg and the middle support leg, thereby increasing the service life of the metal at the connection.

[0036] At the same time, the central control device and the infrared sensor cooperate with each other to calculate the force conditions on both sides of the bridge-building machine, and automatically adjust the gantry to move to the specified position. Specifically, in step S4, when the middle leg is over-width, the front leg and the front temporary leg are used as supports for the bridge-building machine, that is, the length of the main gantry guide beam on the side of the front leg close to the front temporary leg is extremely short. For safety reasons, the gantry is located between the front leg and the front temporary leg, and close to the front temporary leg, so that the mass of the main gantry guide beam on the left side of the fulcrum + the mass of the gantry × the distance between the gantry and the fulcrum = the mass of the main gantry guide beam on the right side of the fulcrum + the mass of the gantry × the distance between the gantry and the fulcrum, thereby preventing the front end of the bridge-building machine from tilting during the over-width of the middle leg, so that the bridge-building machine has strong stability and safety during the lateral movement.

[0037] Furthermore, in order to further increase the safety of the bridge-building machine during the transverse movement, the central control device can automatically determine the mass changes at both ends of the bridge-building machine's fulcrum according to the movement instructions input by the staff, and synchronously move the gantry truck to improve the stability of the overall movement process. For example, when the staff inputs a forward instruction and the main gantry guide beam moves forward, the L2 increases and L4-L3 decreases, so that Gl increases and Gr decreases. In order to maintain the overall stability of the bridge-building machine, the gantry truck at the upper end of the main gantry guide beam needs to be moved backward synchronously to keep the overall balance of the bridge-building machine. At the same time, if the gantry truck cannot move due to external reasons, the weight of both ends of the bridge-building machine cannot be adjusted at this time. At this time, the central control device detects that the weight at one end of the fulcrum is constantly increasing. When the weight on one side is greater than the weight on the other side, When the bridge-building machine is in a state of collapse, the heavier side tends to move downward, eventually causing the bridge-building machine to tip over, resulting in casualties and damage to the equipment. The central control device controls the hydraulic device to urgently raise the front temporary outriggers or the rear outriggers to prevent the bridge-building machine from tipping over, which also facilitates subsequent maintenance of the bridge-building machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a flow chart of a bridge erecting machine width-shifting method according to an embodiment of a lever balancing system and a control method thereof for a bridge erecting machine transversely shifting over a width of the present invention;

[0039] Figure 2 The first part is a flow chart of a bridge erecting machine balance control method according to an embodiment of a lever balance system and a control method thereof for a bridge erecting machine transversely shifted over a width of the present invention;

[0040] Figure 3 The second part of the flow chart of the bridge erection machine balance control method of the embodiment of the lever balance system and control method thereof for the bridge erection machine transverse movement of the present invention;

[0041] Figure 4 The third part is a flow chart of a bridge erecting machine balance control method according to an embodiment of a lever balance system and a control method thereof for a bridge erecting machine transversely shifted over a width of the present invention;

[0042] Figure 5 The fourth part is a flow chart of a bridge erecting machine balance control method according to an embodiment of a lever balance system and a control method thereof for a bridge erecting machine transversely shifted over a width of the present invention;

[0043] Figure 6 A schematic side view of a bridge erecting machine showing an embodiment of a lever balancing system and a control method thereof for lateral movement of a bridge erecting machine according to the present invention;

[0044] Figure 7 It is a structural schematic diagram of a bridge erection machine dismantling truss vehicle according to an embodiment of a lever balancing system and a control method thereof for lateral movement of a bridge erection machine according to the present invention;

[0045] Reference numerals in the figure: 1. main truss guide beam; 2. front temporary outrigger; 3. rear outrigger; 4. hydraulic device; 5. front outrigger; 6. middle outrigger; 7. track beam; 8. turntable; 9. truss car; 10. infrared sensor; 11. central control device. DETAILED DESCRIPTION

[0046] Reference Figures 1 to 7 The present invention further describes a lever balancing system for transverse movement of a bridge erecting machine and a control method thereof.

[0047] For ease of explanation, spatial relative terms such as "upper", "lower", "left", "right" and the like are used in the embodiments to illustrate the relationship of one element or feature shown in the figure relative to another element or feature. It should be understood that, in addition to the orientation shown in the figure, the spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, the element described as being "under" other elements or features will be positioned "on" other elements or features. Therefore, the exemplary term "under" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used here can be interpreted accordingly.

[0048] Furthermore, relational terms such as “first” and “second” and the like are merely used to distinguish one component from another having the same name, but do not necessarily require or imply any such actual relationship or order between these components.

[0049] For ease of understanding, in the following embodiments, the length of the main truss guide beam of the bridge erecting machine is 60m, the overall mass is 20t, the weight of the main truss guide beam is 1t / m, there are two truss vehicles on the main truss guide beam, a single truss vehicle weighs 20t, and the rated lifting capacity is 130t.

[0050] The present application provides a lever balancing system for the transverse movement of a bridge erecting machine, comprising two parallel main truss guide beams 1, a front temporary support leg 2 arranged at one end of the main truss guide beam 1, and a rear support leg 3 arranged at the other end of the main truss guide beam 1, wherein the front temporary support leg 2 and the rear support leg 3 are also provided with a hydraulic device 4, and the front temporary support leg 2 and the rear support leg 3 are extended and retracted in the main truss guide beam 1 through the hydraulic device 4, and can support the entire bridge erecting machine with force, and the lower end of the main truss guide beam 1 is also provided with a front support leg 5 and a middle support leg 6, and the bottom of the front support leg 5 and the middle support leg 6 A track beam 7 is also provided, and the front support leg 5 and the middle support leg 6 can slide along the track beam 7. A turntable 8 is provided between the front support leg 5 and the main truss guide beam 1, and between the middle support leg 6 and the main truss guide beam 1. The turntable 8 is used to adjust the overall rotation angle of the bridge-building machine. A transverse track is provided in the main truss guide beam 1, and at least two truss vehicles 9 are provided on the transverse track. The truss vehicles 9 are used to balance the load relationship of the bridge-building machine. A balancing device is also provided inside the main truss guide beam 1, and the balancing device is configured to maintain the overall balance of the bridge-building machine during the transverse movement of the bridge-building machine.

[0051] The balancing device includes an infrared sensor 10 arranged on the main truss guide beam 1 and a central control device 11 which is communicatively connected to the infrared sensor 10. The infrared sensor 10 is used to detect the specific positions of the front support leg 5 and the middle support leg 6 on the bridge-building machine and send the information to the central control device 11. The central control device 11 is used to calculate the force conditions at both ends of the bridge-building machine's fulcrum and control the truss vehicle 9 to move to a specified position.

[0052] By adopting the above technical scheme, the main structure of the bridge-building machine is a multi-section truss connecting beam, which is easy to disassemble and assemble, convenient for transfer to the construction site, can be moved horizontally in one time, has strong wind resistance, can ensure safe operation, and through the turntable 8 function of the bridge-building machine, the bridge-building machine is controlled to move horizontally between 0° and 45°, which is safe and reliable. Compared with the traditional bridge-building machine width-changing operation, it takes less time, requires less cost, and has high efficiency of horizontal movement.

[0053] Furthermore, by arranging a truss 9 at the upper end of the bridge-building machine, the mass of the truss 9 allows the entire bridge-building machine to reach a lever balance state during the lateral movement, so that the masses of the front support leg 5 and the middle support leg 6 on both sides are the same, preventing uneven force on both ends of the bridge-building machine from causing one end to tilt, thereby causing a safety accident and causing casualties. At the same time, in order to realize the movement of the bridge-building machine, the front support leg 5 and the middle support leg 6 are slidably connected to the main truss guide beam 1, thereby realizing the movement of the bridge-building machine on the bridge deck when the support legs are stressed. The turntable can control the offset angle of the bridge-building machine during the movement of the front support leg and the middle support leg, thereby increasing the service life of the metal at the connection.

[0054] The present application also provides a method for lateral movement of a bridge erecting machine using a lever balancing system for lateral movement of a bridge erecting machine, comprising the following steps: S1, retracting the front temporary legs and the middle legs of the bridge erecting machine, controlling the bridge erecting machine to rotate an angle so that the bridge erecting machine and the bridge deck are at an angle of 30°, and preparing to move the front temporary legs over the bridge;

[0055] S2, move the bridge erection machine to make the front temporary outrigger reach the target width of the bridge deck, lower the front temporary outrigger, and prepare for the front outrigger to pass the width;

[0056] S3, retract the front outrigger, control the front outrigger to move to the target width of the bridge deck, then lower the front outrigger and prepare for the middle outrigger to cross the width;

[0057] S4, retract the middle outrigger, control the middle outrigger to move to the target width of the bridge deck, and then lower the middle outrigger;

[0058] S5. Retract the front temporary outriggers and control the bridge-erecting machine to rotate its angle so that the bridge-erecting machine slowly changes from a 30° angle with the current bridge deck to being parallel to the current bridge deck, thus completing the overall width transition of the bridge-erecting machine.

[0059] Preferably, the control method of the lever balance system for the transverse movement of the bridge erecting machine also includes a balance control method for the bridge erecting machine, including the following steps: S11, the central control device detects whether the front legs and the rear legs of the bridge erecting machine are both in a lowered support state, if so, jump to S12 to continue the detection, otherwise, jump to S15 to continue the detection;

[0060] S12, the infrared sensor detects the specific positions of the front outrigger and the middle outrigger on the bridge erecting machine, and determines the current fulcrum of the bridge erecting machine. At the same time, the infrared sensor detects the positions of the two gantry vehicles on the bridge erecting machine, and sends the information to the central control device;

[0061] S13, the central control device determines the force conditions at both ends of the fulcrum of the bridge erecting machine according to the position of the fulcrum of the bridge erecting machine and the position of the gantry vehicle, and determines that the force on the left side of the fulcrum is Gl, and the force on the right side of the fulcrum is Gr;

[0062] S14, the central control device determines the size of Gl and Gr. If Gl>Gr, the central control device controls the gantry vehicle to move rightward, and synchronously updates the data of Gl and Gr until Gl=Gr. If Gr>Gl, the central control device controls the gantry vehicle to move leftward, and synchronously updates the data of Gl and Gr until Gr=Gl.

[0063] S15, the central control device determines whether the front outrigger is supported and stressed. If so, it jumps to S16 to continue testing. Otherwise, it jumps to S19 to continue testing.

[0064] S16, the infrared sensor detects the specific position of the front outrigger on the bridge erecting machine and determines the current fulcrum of the bridge erecting machine. At the same time, the infrared sensor detects the positions of the two gantry vehicles on the bridge erecting machine and sends the information to the central control device;

[0065] S17, the central control device determines the force conditions at both ends of the fulcrum of the bridge erecting machine according to the position of the fulcrum of the bridge erecting machine and the position of the gantry vehicle, and determines that the force on the left side of the fulcrum is Gl, and the force on the right side of the fulcrum is Gr;

[0066] S18, the central control device determines the size of Gl and Gr. If Gl>Gr, the central control device controls the gantry vehicle to move rightward, and synchronously updates the data of Gl and Gr until Gl=Gr. If Gr>Gl, the central control device controls the gantry vehicle to move leftward, and synchronously updates the data of Gl and Gr until Gr=Gl.

[0067] S19, the infrared sensor detects the specific position of the middle outrigger on the bridge erecting machine and determines the current fulcrum of the bridge erecting machine. At the same time, the infrared sensor detects the positions of the two gantry vehicles on the bridge erecting machine and sends the information to the central control device;

[0068] S20, the central control device determines the force conditions at both ends of the fulcrum of the bridge erecting machine according to the position of the fulcrum of the bridge erecting machine and the position of the gantry vehicle, and determines that the force on the left side of the fulcrum is Gl, and the force on the right side of the fulcrum is Gr;

[0069] S21. The central control device determines the size of Gl and Gr. If Gl>Gr, the beam vehicle is controlled to move to the right, and the data of Gl and Gr are synchronously updated until Gl=Gr. If Gr>Gl, the beam vehicle is controlled to move to the left, and the data of Gl and Gr are synchronously updated until Gr=Gl.

[0070] Preferably, the force calculation formula on both sides of the bridge erection machine support is as follows:

[0071] G=L×Lg+Lh×T(1)

[0072] Among them, G is the pressure on one side of the bridge erection machine's fulcrum, L is the length of the main truss guide beam on that side, Lg is the mass of each unit length of the main truss guide beam, Lh is the distance between the truss car and the fulcrum on that side, and is 0 if there is no truss car on that side, and T is the mass of the truss car.

[0073] The central control device and the infrared sensor cooperate with each other to calculate the force conditions on both sides of the bridge-building machine and automatically adjust the gantry vehicle to move to the specified position. For example, in step S4, during the process of the middle leg passing the width, the front leg and the front temporary leg are used as supports for the bridge-building machine. The distance between the front leg and the front temporary leg is 20m, and the total length of the main gantry guide beam is 60m, that is, the length on the left side of the fulcrum is 10m, and the length on the right side of the fulcrum is 50m. The mass of the gantry vehicle is 20t, and the mass of each unit length of the main gantry guide beam is 1t / m. At this time, the central control device determines that the two gantry vehicles need to be set between the front temporary leg and the front leg, and are 9m away from the front leg. The force at both ends of the fulcrum is 50t, which prevents the front end of the bridge-building machine from tilting during the process of the middle leg passing the width, so that the bridge-building machine has strong stability and safety during the lateral movement.

[0074] Preferably, the fulcrum of the bridge erecting machine is calculated as follows:

[0075]

[0076] Among them, L2 is the distance between the front support leg and the front temporary support leg, L3 is the distance between the middle support leg and the front temporary support leg, and L4 is the overall length of the main truss guide beam.

[0077] For example, in step S4, during the process of the middle leg passing the width, the front leg and the front temporary leg are used as supports for the bridge-building machine, and the distance between the front leg and the front temporary leg is 20m, that is, the fulcrum of the current bridge-building machine is located at the front end of the main truss guide beam, 10m away from the front temporary leg.

[0078] Preferably, the balance control method of the bridge erecting machine also includes the following steps: S22, the central control device receives the movement signal of the main truss guide beam and automatically adjusts the position of the truss vehicle.

[0079] Preferably, the balance control method of the bridge erecting machine further comprises the following steps: S23, the central control device determines the size of G1 and Gr, if If the rear end of the bridge erector is at risk of lifting, the temporary legs before the hydraulic device is lifted will bear the force on the bridge erector. It is judged that there is a risk of the front end of the bridge-building machine being lifted up, and after the hydraulic device is lifted up, the outriggers exert force on the bridge-building machine.

[0080] The central control device 11 can automatically judge the mass change at both ends of the bridge erection machine fulcrum according to the movement command input by the staff, and synchronously move the truss 9 to improve the stability of the overall movement process. For example, when the staff inputs the forward command and the main truss guide beam 1 moves forward, the L2 increases and L4-L3 decreases, so that Gl increases and Gr decreases. In order to maintain the overall stability of the bridge erection machine, the truss 9 at the upper end of the main truss guide beam 1 needs to be moved backward synchronously to maintain the overall balance of the bridge erection machine. At the same time, if the truss 9 cannot move due to external reasons, the weight at both ends of the bridge erection machine cannot be adjusted at this time. At this time, the central control device 11 detects that the weight at one end of the fulcrum is constantly increasing. When the weight on one side is greater than 3 / 2 of the weight on the other side, the side with the larger weight tends to move downward, which eventually leads to the tipping of the bridge erection machine, causing casualties and damage to the device. The central control device 11 controls the hydraulic device 4 to urgently support the front temporary support leg 2 or the rear support leg 3 to prevent the tipping of the bridge erection machine. At the same time, it is also convenient for the subsequent maintenance of the bridge erection machine, further increasing the safety of the bridge erection machine during the transverse movement.

[0081] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A lever balancing system for lateral movement of a bridge erecting machine, characterized in that: The invention comprises two parallel main truss guide beams (1), a front temporary support leg (2) arranged at one end of the main truss guide beam (1), and a rear support leg (3) arranged at the other end of the main truss guide beam (1), wherein the front temporary support leg (2) and the rear support leg (3) are further provided with a hydraulic device (4), the front temporary support leg (2) and the rear support leg (3) are extended and retracted in the main truss guide beam (1) through the hydraulic device (4), and can support the entire bridge erection machine with force, the lower end of the main truss guide beam (1) is further provided with a front support leg (5) and a middle support leg (6), and the bottom of the front support leg (5) and the middle support leg (6) are further provided with a track beam (7), The front legs (5) and the middle legs (6) can slide along the track beam (7); a turntable (8) is provided between the front legs (5) and the main truss guide beam (1), and between the middle legs (6) and the main truss guide beam (1); the turntable (8) is used to adjust the rotation angle of the entire bridge erection machine; a transverse track is provided inside the main truss guide beam (1); at least two truss vehicles (9) are provided on the transverse track; the truss vehicles (9) are used to balance the load relationship of the bridge erection machine; a balancing device is also provided inside the main truss guide beam (1); the balancing device is configured to maintain the overall balance of the bridge erection machine during the transverse movement of the bridge erection machine; The balancing device comprises an infrared sensor (10) arranged on the main truss guide beam (1) and a central control device (11) which is communicatively connected to the infrared sensor (10); the infrared sensor (10) is used to detect the specific positions of the front legs (5) and the middle legs (6) on the bridge erecting machine and send the information to the central control device (11); the central control device (11) is used to calculate the force conditions at both ends of the bridge erecting machine support point and control the truss vehicle (9) to move to a specified position.

2. A method for lateral movement of a bridge erecting machine using a lever balancing system for lateral movement of a bridge erecting machine according to claim 1, comprising the following steps: S1. Retract the front temporary outrigger and middle outrigger of the bridge erector, control the bridge erector to rotate the angle so that the bridge erector is at an angle of 30° with the bridge deck, and prepare to move the front temporary outrigger over the width; S2, move the bridge erection machine to make the front temporary outrigger reach the target width of the bridge deck, lower the front temporary outrigger, and prepare for the front outrigger to pass the width; S3, retract the front outrigger, control the front outrigger to move to the target width of the bridge deck, then lower the front outrigger and prepare for the middle outrigger to cross the width; S4, retract the middle outrigger, control the middle outrigger to move to the target width of the bridge deck, and then lower the middle outrigger; S5. Retract the front temporary outriggers and control the bridge-erecting machine to rotate its angle so that the bridge-erecting machine slowly changes from a 30° angle with the current bridge deck to being parallel to the current bridge deck, thus completing the overall width transition of the bridge-erecting machine.

3. A control method for a lever balancing system for transverse movement of a bridge erecting machine according to claim 2, characterized in that: The steps S1-S5 also include a balance control method for the bridge erecting machine, including the following steps: S11, the central control device detects whether the front legs and the rear legs of the bridge erecting machine are both in a lowered support state, if so, jump to S12 to continue the detection, otherwise, jump to S15 to continue the detection; S12, the infrared sensor detects the specific positions of the front outrigger and the middle outrigger on the bridge erecting machine, and determines the current fulcrum of the bridge erecting machine. At the same time, the infrared sensor detects the positions of the two gantry vehicles on the bridge erecting machine, and sends the information to the central control device; S13, the central control device determines the force conditions at both ends of the fulcrum of the bridge erecting machine according to the position of the fulcrum of the bridge erecting machine and the position of the gantry vehicle, and determines that the force on the left side of the fulcrum is Gl, and the force on the right side of the fulcrum is Gr; S14, the central control device determines the size of Gl and Gr. If Gl>Gr, the central control device controls the gantry vehicle to move rightward, and synchronously updates the data of Gl and Gr until Gl=Gr. If Gr>Gl, the central control device controls the gantry vehicle to move leftward, and synchronously updates the data of Gl and Gr until Gr=Gl. S15, the central control device determines whether the front outrigger is supported and stressed. If so, it jumps to S16 to continue testing. Otherwise, it jumps to S19 to continue testing. S16, the infrared sensor detects the specific position of the front outrigger on the bridge erecting machine and determines the current fulcrum of the bridge erecting machine. At the same time, the infrared sensor detects the positions of the two gantry vehicles on the bridge erecting machine and sends the information to the central control device; S17, the central control device determines the force conditions at both ends of the fulcrum of the bridge erecting machine according to the position of the fulcrum of the bridge erecting machine and the position of the gantry vehicle, and determines that the force on the left side of the fulcrum is Gl, and the force on the right side of the fulcrum is Gr; S18, the central control device determines the size of Gl and Gr. If Gl>Gr, the central control device controls the gantry vehicle to move rightward, and synchronously updates the data of Gl and Gr until Gl=Gr. If Gr>Gl, the central control device controls the gantry vehicle to move leftward, and synchronously updates the data of Gl and Gr until Gr=Gl. S19, the infrared sensor detects the specific position of the middle outrigger on the bridge erecting machine and determines the current fulcrum of the bridge erecting machine. At the same time, the infrared sensor detects the positions of the two gantry vehicles on the bridge erecting machine and sends the information to the central control device; S20, the central control device determines the force conditions at both ends of the fulcrum of the bridge erecting machine according to the position of the fulcrum of the bridge erecting machine and the position of the gantry vehicle, and determines that the force on the left side of the fulcrum is Gl, and the force on the right side of the fulcrum is Gr; S21. The central control device determines the size of Gl and Gr. If Gl>Gr, the beam vehicle is controlled to move to the right, and the data of Gl and Gr are synchronously updated until Gl=Gr. If Gr>Gl, the beam vehicle is controlled to move to the left, and the data of Gl and Gr are synchronously updated until Gr=Gl.

4. A control method for a lever balancing system for transverse movement of a bridge erecting machine according to claim 3, characterized in that: The force calculation formula on both sides of the bridge erection machine support is as follows: G=L×Lg+Lh×T (1) Among them, G is the pressure on one side of the bridge erection machine's fulcrum, L is the length of the main truss guide beam on that side, Lg is the mass of each unit length of the main truss guide beam, Lh is the distance between the truss car and the fulcrum on that side, and is 0 if there is no truss car on that side, and T is the mass of the truss car.

5. The control method of the lever balance system for the transverse movement of the bridge erecting machine according to claim 3 is characterized in that: The fulcrum calculation formula of the bridge erecting machine is as follows: Among them, L2 is the distance between the front support leg and the front temporary support leg, L3 is the distance between the middle support leg and the front temporary support leg, and L4 is the overall length of the main truss guide beam.

6. A control method for a lever balancing system for transverse movement of a bridge erecting machine according to claim 3, characterized in that: The balance control method of the bridge erecting machine also includes the following steps: S22, the central control device receives the movement signal of the main truss guide beam and automatically adjusts the position of the truss vehicle at the same time.

7. A control method for a lever balancing system for transverse movement of a bridge erecting machine according to claim 3, characterized in that: The balance control method of the bridge erecting machine also includes the following steps: S23, the central control device determines the size of G1 and Gr, if If the rear end of the bridge erector is at risk of lifting, the temporary legs before the hydraulic device is lifted will bear the force on the bridge erector. It is judged that there is a risk of the front end of the bridge-building machine being lifted up, and after the hydraulic device is lifted up, the outriggers exert force on the bridge-building machine.

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