Multi-point coordinated intelligent lifting device and method for track slabs

Abstract

A multi-point coordinated intelligent lifting device and method for track slabs, comprising a lifting device body, a measurement control tablet, and a lifting jack, the lifting device body and the measurement control tablet being connected via wireless communication, the lifting device body being connected to the lifting jack via a jack oil pipe, a jack placement area at the front end of the lifting device body for accommodating and moving the lifting jack, a pushing means being optionally provided at the rear of the lifting device body, and a number of casters being provided at the bottom, thereby achieving the advantages of the synchronization, intelligence, and precision of track slab lifting using a crane or crane device, and the lightness and versatility of lifting using an artificial hydraulic jack, and adapting to the current terrain environment of track slab laying. The device is equipped with an intelligent measurement and control system, which can be started with a single touch and automatically stopped, allowing for accurate and easy track slab lifting operations with fewer manpower inputs.

Description

[Technical Field]

[0001] The present invention relates to the technical field, and more particularly to a multi-point coordinated intelligent lifting device and method for track slabs. [Background technology]

[0002] Prefabricated track slabs are prefabricated concrete elements widely used in railway construction. With the progress of urbanization, the demand for urban rail transit construction is increasing, and the application market for prefabricated track slabs is also expanding. In addition, the country has given great support to urban rail transit construction, and related policies have also been put forward to promote the application of prefabricated track slabs. At present, prefabricated track slabs play an important role in high-speed railway tracks, subway tracks, and urban rail transit tracks due to their high construction efficiency, high flatness, and high stability.

[0003] The increasing use of prefabricated track slabs in rail transit projects has led to a number of problems. After construction, prefabricated track slabs may settle over time due to issues such as uneven or unstable foundations below, environmental changes, and construction quality, affecting running safety and passenger comfort. In such cases, the settled track slab must be repaired. The current common construction method involves selecting methods such as cranes, hoists, and hydraulic jacks to carry out repairs within the maintenance window, depending on the conditions at the construction site. However, these methods are heavy, inefficient, and prone to large errors, making it impossible to ensure that the repair and positioning of prefabricated track slabs can be completed quickly and accurately within the limited maintenance window.

[0004] Therefore, in view of the above-mentioned deficiencies, the designer of the present invention has, through diligent research and design, integrated the experience and achievements he has gained from working in the related industry for a long time, researched and designed a multi-point coordinated intelligent lifting device and method for track slabs to solve the above-mentioned deficiencies. Summary of the Invention [Problem to be solved by the invention]

[0005] The present invention aims to provide a multi-point coordinated intelligent lifting device and method for track slabs, which has the advantages of small volume, high efficiency, intelligent coordination, and easy operation, and can efficiently and accurately complete track slab lifting work within the maintenance time using a small number of personnel. [Means for solving the problem]

[0006] To achieve the above objectives, the present invention discloses a multi-point coordinated intelligent lifting method for track slabs, Step 1 is a preparation step of transporting the lifting device to a target position and placing four lifting jacks at the four inner corners of the track slab, respectively; The lifting device starts to operate, and the target lift height L of the four lifting jacks is reached. n Step 2 to start the lift process and When the lift jack starts, the hydraulic pressure value P of each jack 0n and collect the hydraulic pressure values ​​P of each jack for the subsequent lifting process. 1n Step 3: Real-time monitoring of The stress value F of each lifting jack during the lifting process Δn is calculated in real time, and when the lift jacks are lifted to a certain height and come into contact with the underside of the track slab, the lift of each lift jack is hindered and the stress value F Δn As the stress becomes larger, one critical threshold F 臨界 Step 4: when the stress value of a lifting jack reaches the critical stress threshold, the corresponding lifting jack is determined to have completed its positioning operation, and the lifting motion of the jack is stopped; Step 5: Repeating step 4 for each lift jack until all lift jacks have completed the positioning phase, stopped lifting, and completed overall positioning; Start the actual lift and measure the jack displacement sensor values ​​L corresponding to the four lift jacks. 0n The actual lifting process is started from this point, and the initial operating speed of the four lifting jacks is V 0n Step 6, which is During the lifting process, the measured value of each jack displacement sensor L 1n in real time and calculates the actual lift amount L of the parts corresponding to the four jacks. Δnリフト The actual lift amount is calculated by L Δnリフト =L 1n -L 0n and the target lift height of each lift jack is L n In combination with each lift jack 3 lift progress Per nリフト Calculate

number

number

[0007] The stress value of the lifting jack in step 4 is calculated according to the hydraulic oil contact surface in the jack cylinder and the corresponding hydraulic pressure value of the jack. The hydraulic oil contact surface in the jack cylinder belongs to the manufacturing size of the jack and is a known value. The diameter of the contact surface is known as D. The hydraulic pressure value P of each jack monitored in real time is 1n , that is, the corresponding P of the four jacks 11 , P 12 , P 13 , P 14 Combined with this, real-time stress changes of the jack are calculated,

number

[0008] The method for determining the slope in step 7 is as follows: Lifting progress per 4 lift jacks 1リフト , Per 2リフト , Per 3リフト , Per 4リフト Arrange in order of size, and the fastest progress Per maxリフト and slowest progress Per minリフト and obtain the maximum progress difference between the four lift jacks. Δmaxリフト =Permaxリフト -Per minリフト and Maximum progress difference threshold Per Δ臨界 Set (1)Per Δmaxリフト ≧Per Δ臨界 If so, determine that the track slab has tilted, and jump to step 8. (2) If not, then it is not tilted and jump to step 9.

[0009] In step 8, the real-time lift progress of the four lift jacks is recorded. nリフト Based on average progress Per 平均 Calculate

number

[0010] In step 9, the deceleration threshold Per 減速 Set the lifting process, compare the lifting progress of each lift jack in real time, and nリフト ≧Per 減速 If yes, enter the deceleration process, if not, jump to step 7, However, Per 減速 is the deceleration threshold, which is a fixed value, and the lift jack will start the deceleration process when the lift progress exceeds this value; For the lift jack 3 entering the deceleration process, its operating speed V 1n V 1n減速 Adjust to V 1n減速 =V 1n ×ePs 減速 and However, ePs 減速 is the deceleration coefficient, which is a fixed value, and the specific value is determined by the user's selection of the level for the operation speed, which is divided into three stages: high speed, medium speed, and low speed, and each stage corresponds to a different deceleration coefficient.

[0011] The method for determining the slope in step 15 is as follows: 4 lift jacks lowering progress per 1降下 , Per 2降下 , Per 3降下 , Per 4降下 Arrange in order of size, and the fastest progress Per max降下 and slowest progress Per min降下 and obtain the maximum progress difference between the four lift jacks. Δmax降下 =Per max降下 -Per min降下 and the maximum progress difference threshold Per Δ臨界 Take (1)Per Δmax降下 ≧Per Δ臨界 If so, the track slab is tilted and jump to step 16. (2) If not, then it is not tilted and jump to step 17.

[0012] In step 16, the real-time lift progress of the four lift jacks is recorded. n降下 Based on average progress Per 平均 Calculate

number

[0013] A lifting device for realizing a multi-point coordinated intelligent lifting method for track slabs is further disclosed, which includes a lifting device body, a measurement control tablet, and a lifting jack, wherein the lifting device body and the measurement control tablet are connected via wireless communication, and the lifting device body is connected to the lifting jack through a jack oil pipe, The front end of the lift device body is provided with a jack placement area for storing and moving a lift jack, a push means may be provided at the rear of the lift device body, and a plurality of casters are provided at the bottom.

[0014] The lifting jack includes a jack displacement sensor, a jack lifting leg, a jack lifting head, and a jack lifting column. The jack lifting leg and the jack lifting head are installed together to form a vertical steel structure and a staircase-shaped structure. The tip of the jack lifting column and the jack lifting head are connected by a screw. [Effects of the Invention]

[0015] As can be seen from the above, the multi-point coordinated intelligent lifting device and method for track slabs according to the present invention have the following advantages:

[0016] 1. It has the advantages of small volume, high efficiency, intelligent coordination, and easy operation, and can efficiently and accurately complete track slab lifting work within the maintenance time using a small number of personnel.

[0017] 2. The track slab lifting system has the advantages of synchronization, intelligence, and precision when using a crane or hoist, and the convenience and versatility of lifting using an artificial hydraulic jack, making it suitable for the current terrain and environment of track slab laying. The system is equipped with an intelligent measurement and control system, which starts with one touch and stops automatically, allowing for accurate and easy track slab lifting with less manpower input.

[0018] Further details of the present invention can be gleaned from the following description and drawings. [Brief explanation of the drawings]

[0019] [Figure 1] FIG. 1 shows a front-side schematic view of a multi-point coordinated intelligent lifting device for track slabs according to the present invention. [Figure 2] FIG. 2 shows a schematic rear-side view of the multi-point coordinated intelligent lifting device for track slabs according to the present invention. [Figure 3] FIG. 3 shows the operation principle diagram of the multi-point coordinated intelligent lifting device for track slabs according to the present invention. [Figure 4] FIG. 4 shows a cross-sectional view of the structural relationship between the jack and the track slab of the present invention. [Figure 5] FIG. 5 shows a plan view of the structural relationship between the jack and the track slab of the present invention. [Figure 6] FIG. 6 shows a cross-sectional view of a track slab in a tunnel before lifting using the multi-point coordinated intelligent lifting device for track slabs according to the present invention. [Figure 7] FIG. 7 shows a flowchart of the multi-point coordinated intelligent lift according to the present invention. [Figure 8] FIG. 8 illustrates the process of multi-point coordinated intelligent recovery according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0020] As shown in Figures 1, 2 and 3, a multi-point coordinated intelligent lifting device and method for track slabs according to the present invention are shown.

[0021] The multi-point coordinated intelligent lifting device and method for track slabs includes a lifting device body 1, a measurement control tablet 2 and a lifting jack 3, the lifting device body 1 and the measurement control tablet 2 can be connected via wireless communication, and the lifting device body 1 is connected to the lifting jack 3 via a jack oil pipe 4.

[0022] A jack placement area 14 may be provided at the front end of the lifting device body 1 to accommodate and move the lifting jack 3, a pushing means 11 may be provided at the rear of the lifting device body 1, and a number of casters 12 may be provided at the bottom. Before performing maintenance work on the track slab 5, all related equipment can be carried like a cart to the target location of the track slab 5, thereby saving time, effort, and repair costs. A power plug 13 and a control area 16 are provided on the side of the lifting device body 1, a reading area 15 is provided on the top surface, and a jack oil pipe interface 17 and an oil level gauge 18 are provided at the front.

[0023] After the track slab 5 is installed on site, concrete, rubber mats or other media are filled around and under the track slab 5, which adheres tightly to the periphery of the track slab 5, forming a tightly fitted track slab groove 7, as shown in Figure 6. When inspection and repair are required due to settlement or damage to the track slab 5, the track slab 5 is often first lifted out of the track slab groove 7, but because the periphery of the track slab 5 adheres tightly when lifted, the track slab 5 becomes caught in the track slab groove 7 and cannot move even if it is tilted slightly.

[0024] The lifting jack 3 includes a jack displacement sensor 31, a jack lifting leg 32, a jack lifting head 33, and a jack lifting column 34. The jack lifting leg 32 and the jack lifting head 33 are installed together to form a vertical steel structure and a staircase-shaped structure. The tip of the jack lifting column 34 and the jack lifting head 33 are connected by a screw.

[0025] Therefore, the multi-point coordinated intelligent lifting device for track slabs according to the present invention monitors the lift height, speed, stress, etc. of each lifting jack 3 in real time through the measurement control tablet 2, calculates the lift tendency of each jack in real time and adjusts the speed, maintains the coordination between each lifting jack 3, and ensures that the entire process can be completed smoothly. Referring to Figures 7 and 8, the multi-point coordinated intelligent lifting method for track slabs according to the present invention includes the following steps 1 to 19.

[0026] Step 1: Preparation step, that is, transport the lifting device to the target position, place the four lifting jacks 3 at the four inner corners of the track slab 5 (shown in Figure 5), and extend the jack lifting legs 32 of the four lifting jacks 3 below the edge of the track slab 5 (shown in Figure 4).

[0027] The relative positions of the four lifting jacks 3 and the track slab 5 are shown in Figure 5. After starting the lifting, the lifting device body 1 supplies oil to each of the four lifting jacks 3, and the jack lifting columns 34 are hydraulically driven to lift the jack lifting heads 33 upward. The jack lifting heads 33 then lift the jack lifting legs 32 upward.

[0028] Step 2: The lifting device main body 1 starts operation, and the measuring control tablet 2 to control it can be turned on. The measuring control program on the measuring control tablet 2 can be launched, and the measuring control program can establish a wireless communication connection with the lifting device main body 1. The target lifting height L of the four lifting jacks 3 can be entered on the operation interface of the measuring control program.n (The four lift jacks correspond to L1, L2, L3, and L4 respectively) and tap Start to carry out the lifting process. Preferably, the intelligent lift can be started with one touch on the measurement control tablet 2.

[0029] As is clear from step 1, before lifting, the jack lifting legs 32 are not in direct contact with the track slab 5. There is still a distance between starting the activation of the jack lifting legs 32 and actually starting to lift the track slab 5, and the jack lifting legs 32 must first lift a certain distance and come into contact with the track slab 5 before starting full-scale lifting; this stage is called the positioning stage of the lifting jacks 3. In this positioning stage, the lifting jacks 3 are in a zero-load state, and the hydraulic pressure of each jack is stable.

[0030] The target lift height refers to the height to which the track slab 5 is lifted, and obviously this height does not include the distance lifted by the lifting jacks 3 during the positioning phase, during which the track slab 5 is not moved. The target lift heights L1, L2, L3, L4 are the difference in extension of the corresponding lifting jacks 3 from the end of the positioning phase to the completion of the final lift.

[0031] Step 3: Immediately after starting the lift jack 3, check the hydraulic pressure value P of each jack. 0n (The four jacks are P 01 , P 02 , P 03 , P 04 ) to collect the hydraulic pressure values ​​P 1n (The four jacks are P 11 , P 12 , P 13 , P 14 (corresponding to the

[0032] Step 4: During the lifting process, the stress value F of each lifting jack 3 Δnis calculated in real time, and when the lift jacks 3 are lifted to a certain height and contact the underside of the track slab 5, the lift of each lift jack 3 is hindered, and the stress value F Δn As the stress becomes larger, one critical threshold F 臨界 When the stress value of a certain lifting jack 3 reaches the critical stress threshold, it is determined that the corresponding lifting jack 3 has completed its positioning operation, and the lifting motion of the jack is stopped.

[0033] The stress value of the lifting jack 3 is calculated according to the hydraulic oil contact surface in the jack cylinder and the corresponding hydraulic pressure value of the jack. The hydraulic oil contact surface in the jack cylinder belongs to the manufacturing size of the jack and is a known value, and the diameter of the contact surface is known to be D. The hydraulic pressure value P of each jack monitored in real time 1n (The four jacks are P 11 , P 12 , P 13 , P 14 ) to calculate the real-time stress changes of the jack,

number

[0034] (1)F Δn ≧F 臨界 If so, stop lifting the corresponding jack, (2) If not, continue with the lift.

[0035] Step 5: All lift jacks 3 have completed the positioning stage, stopped lifting, and repeated step 4 for each lift jack respectively until the overall positioning is completed, and then start the subsequent intelligent lifting process.

[0036] Step 6: From this step, the track slab 5 starts to lift, and the measured values ​​L of the jack displacement sensors 31 corresponding to the four lift jacks 3 at this time 0n (The four jacks are L 01 , L 02 , L03 , L 04 The actual lifting process is started from this point. At this time, the initial operating speed of the four lifting jacks 3 is V 0n (The four jacks are V 01 , V 02 , V 03 , V 04 (corresponding to

[0037] Step 7: During the lifting process, the measured values ​​L of each jack displacement sensor 31 are 1n (The four jacks are L 11 , L 12 , L 13 , L 14 The actual lift amount L of the parts corresponding to the four jacks is monitored in real time. Δnリフト The actual lift amount is calculated by L Δnリフト =L 1n -L 0n is.

[0038] Target lift height L of each lift jack 3 n (The four jacks correspond to L1, L2, L3, and L4.) Combined with this, the lift progress of each lift jack 3 is nリフト Calculate

number

[0039] 4 lift jacks 3 lift progress per nリフト Based on this, it is determined whether or not tilting of the track slab 5 has occurred due to non-coordination of the jack lift. The determination method is as follows.

[0040] 4 lift jacks 3 lift progress per 1リフト , Per 2リフト , Per 3リフト , Per 4リフト Arrange in order of size, and the fastest progress Per maxリフト and slowest progress Per minリフト Get the maximum progress difference between the four lift jacks 3, PerΔmaxリフト =Per maxリフト -Per minリフト is.

[0041] Maximum progress difference threshold Per Δ臨界 Set (1)Per Δmaxリフト ≧Per Δ臨界 If so, it is determined that the track slab 5 has tilted, and the process jumps to step 8; (2) If not, then it is not tilted and jump to step 9.

[0042] Before lifting the track slab 5, the track slab 5 may be inclined due to uneven settlement. Therefore, a filler such as a rubber mat is thoroughly filled around the slab, forming a tight track slab groove 7 around and below the track slab 5. If there is no gap or the gap is very small between the track slab 5 and the track slab groove 7 and the lifting of the four jacks is not coordinated, the track slab 5 may tilt, and the track slab 5 may get stuck in the track slab groove 7 and become unable to move. Therefore, during the lifting process of the track slab 5, the lifting motion of the four jacks is adaptively adjusted based on the initial attitude of the track slab 5 to ensure coordinated lifting of multiple parts, thereby realizing the accuracy and safety of the lifting process.

[0043] Step 8: After the track slab 5 tilts, correct the tilt by adjusting the operating speed of the corresponding lift jack 3.

[0044] The operating speed of the jacks is determined by the speed at which the lifting device main body 1 pressurizes hydraulic oil into the jacks. The hydraulic oil flow rate of each jack is controlled by a hydraulic proportional valve, which is determined by the valve's opening and closing angle, which varies with the input control voltage. As can be seen, the operating speed of the jacks cannot be directly controlled but is indirectly controlled by the input voltage of the hydraulic proportional valve. Due to factors such as jack manufacturing errors and the fact that the operating pressures of the oil lines corresponding to each jack are not exactly the same, there is no clear conversion relationship between the input voltage of the hydraulic proportional valve and the jack's operating speed, which greatly increases the difficulty of coordination. Therefore, to ensure coordinated lifting between each jack, an intelligent lifting method is designed for the lifting jacks 3, which dynamically and real-timely adjusts the corresponding operating speed based on the inclination posture of the track slab 5.

[0045] Specifically, the real-time lift progress of the four lift jacks Per nリフト Based on average progress Per 平均 Calculate

number

[0046] Next, the difference Per between the lift progress of each jack and the average progress Δnリフト Calculate

number

[0047] This results in the corresponding adjusted speed V of lift jack 3. 1n Calculate V 1n =V 元n +Per Δnリフト ×ePs.

[0048] However, V 元n is the speed before adjustment of the corresponding jack, and V 元n is the initial operating speed V 0n is equal to.

[0049] However, ePs is a speed adjustment calculation coefficient and is a fixed value, and the specific value is determined by the user's selection of the operating speed level, which is divided into three levels: high speed, medium speed, and low speed, and each level corresponds to a fixed calculation coefficient.

[0050] Step 9: In order to improve the control accuracy of the lift height and the lift stability, when the lift height approaches the target lift height (for example, when the lift height reaches the remaining 10% of the target lift height), the speed of each lift jack 3 is reduced overall until the target lift height is reached smoothly.

[0051] The deceleration threshold Per 減速 Set the lifting process, compare the lifting progress of each lift jack in real time, and nリフト ≧Per 減速 If so, enter the deceleration process, otherwise jump to step 7.

[0052] However, Per 減速 is the deceleration threshold, a fixed value, and the lift jack will start the deceleration process when the lift progress exceeds this value.

[0053] For the lift jack 3 entering the deceleration process, its operating speed V 1n V 1n減速 Adjust to V 1n減速 =V 1n ×ePs 減速 is.

[0054] However, ePs 減速 is the deceleration coefficient, which is a fixed value, and the specific value is determined by the user's selection of the level for the operation speed, which is divided into three stages: high speed, medium speed, and low speed, and each stage corresponds to a different deceleration coefficient.

[0055] Step 10: Lift progress Per 3 of each lift jack nリフト It is determined whether any jack has reached the target lift height based on the above.

[0056] Per nリフト If ≧1, the jack reaches the target lift height and stops the lifting motion of the corresponding lifting jack 3.

[0057] Per nリフト If <1, the jack has not reached the target lift height and the lift continues.

[0058] Step 11: Determine whether all jacks have reached the target lift height.

[0059] If YES, complete the intelligent lifting operation of the target track slab 5.

[0060] If NO, jump to step 7 and continue the intelligent lift operation.

[0061] Step 12: After the repairman completes the lifting of the track slab 5, he starts the repair work on the track slab 5.

[0062] Step 13: After completing the repair work of the target orbital slab 5, carry out the descent process, tap the descent button on the measurement control tablet 2, and start the descent process with one touch.

[0063] Step 14: When the track slab 5 descends, the track slab groove 7 is undergoing repair work, and the impact on the height of the four corners of the track slab groove 7 is unknown, so it is not possible to determine how far each of the four corners of the track slab 5 needs to descend. However, as can be expected, if the track slab 5 descends according to the lift trajectory, it will not tilt or get stuck in the track slab groove 7. Therefore, starting from the current height of the track slab 5, n (The four jacks correspond to L1, L2, L3, and L4) are set as the target lowering distance of the track slab 5, and the track slab 5 can be lowered according to the lift trajectory.

[0064] When the track slab 5 descends, the actual height to which the four corners descend is usually L n Smaller, but to ensure smooth descent of the track slab 5, L n is the target descent distance, and after the track slab 5 has completed its descent, the actual descent distance of the lift jack 3 is L n It is not critical if the jack stroke is less than this, and the jack continues to descend directly until it returns to the zero position.

[0065] Step 15: During the process of lowering the track slab 5, the measured values ​​L of each jack displacement sensor 31 are 1n (The four jacks are L 11 , L 12 , L 13 , L 14 The actual lowering amount L of the parts corresponding to the four jacks is monitored in real time. Δn降下 The actual descent amount is calculated as L Δn降下 =L 0n +L n -L 1n is.

[0066] Target lowering height L of each lift jack 3 n (The four jacks correspond to L1, L2, L3, and L4.) Combined with this, the descent progress of each lift jack 3 Per n降下 Calculate

number

[0067] 4 lift jacks 3 lift progress per n降下 Based on this, it is determined whether or not tilting of the track slab 5 has occurred due to uncoordinated descent of the jacks. The determination method is as follows.

[0068] 4 Lift Jacks 3 Lowering Progress Per 1降下 , Per 2降下 , Per 3降下 , Per 4降下 Arrange in order of size, and the fastest progress Per max降下 and slowest progress Per min降下Get the maximum progress difference between the four lift jacks 3, Per Δmax降下 =Per max降下 -Per min降下 is.

[0069] Step 7 Maximum Progress Difference Threshold Per Δ臨界 Take (1)Per Δmax降下 ≧Per Δ臨界 If so, the track slab 5 is tilted, jump to step 16, (2) If not, then it is not tilted and jump to step 17.

[0070] Step 16: After the track slab 5 tilts, the tilt needs to be corrected by adjusting the operating speed of the corresponding lifting jack 3. The speed adjustment follows the principle that if the progress is too slow, it will accelerate, and if the progress is too fast, it will decelerate.

[0071] Real-time lift progress of 4 lift jacks 3 Per n降下 Based on average progress Per 平均 Calculate

number

[0072] Step 17: During the process of lowering the track slab 5, the stress value F of each lift jack 3 is calculated. Δnis calculated in real time, and when the lift jack 3 descends onto the underside of the track slab 5 and contacts the upper surface of the repaired track slab groove 7, the stress value F of the lift jack 3 is calculated. Δn suddenly becomes small, and the critical stress threshold F 臨界 After the stress of a certain lifting jack 3 drops to the critical stress threshold, it is determined that the corresponding lifting jack 3 has completed its lowering operation, and the lowering motion of the jack is stopped.

[0073] Step 18: Determine if all jacks have stopped descending.

[0074] If YES, the one-touch descent operation of the target orbit slab 5 is completed.

[0075] If NO, jump to step 15 and continue the descent process.

[0076] Step 19: Up to this point, the four corners of the track slab 5 contact the track slab groove 7, completing the intelligent coordinated descent of the track slab 5. After that, all the lifting jacks 3 are set to descend at the maximum speed, and the return of the jacks is completed until the extension amount of all the lifting jacks 3 reaches zero.

[0077] As can be seen, the present invention has the following advantages:

[0078] 1. It has the advantages of small volume, high efficiency, intelligent coordination, and easy operation, and can efficiently and accurately complete track slab lifting work within the maintenance time using a small number of personnel.

[0079] 2. The track slab lifting system has the advantages of synchronization, intelligence, and precision when using a crane or hoist, and the convenience and versatility of lifting using an artificial hydraulic jack, making it suitable for the current terrain and environment of track slab laying. The system is equipped with an intelligent measurement and control system, which starts with one touch and stops automatically, allowing for accurate and easy track slab lifting with less manpower input.

[0080] It should be apparent that the foregoing illustrations and descriptions are merely exemplary and are not intended to limit the disclosure, application, or uses of the present invention. While examples have been described and illustrated in the drawings, the invention is not limited to the particular examples illustrated in the drawings and examples as the best mode presently contemplated for carrying out the teachings of the invention, and the scope of the present invention includes any embodiment falling within the foregoing specification and the appended claims. [Explanation of symbols]

[0081] 1: lifting device body, 11: pushing means, 12: caster, 13: power plug, 14: jack placement area, 15: indication area, 16: control area, 17: jack oil pipe interface, 18: oil level gauge, 2: measurement control tablet, 3: lifting jack, 31: jack displacement sensor, 32: jack lifting leg, 33: jack lifting head, 34: jack lifting column, 4: jack oil pipe, 5: track slab, 6: tunnel wall, 7: track slab groove.

Claims

1. A multi-point coordinated intelligent lifting method for track slabs, comprising: Step 1 is a preparation step of transporting the lifting device to a target position and placing four lifting jacks at the four corners of the inner side of the track slab, respectively; The lift device starts to operate, and the target lift height L of the four lift jacks ｎ Step 2: Enter the following to start the lift process. When the lift jack starts, the hydraulic pressure value P of each jack 0n and collect the hydraulic pressure values ​​P of each jack for the subsequent lifting process. 1n Step 3: monitor the The stress value F of each lifting jack during the lifting process Δn is calculated in real time, and when the lift jacks are lifted to a certain height and come into contact with the underside of the track slab, the lift of each lift jack is hindered and the stress value F Δn As the stress becomes larger, one critical stress threshold F 臨界 Step 4: when the stress value of a lifting jack reaches the critical stress threshold, the corresponding lifting jack is determined to have completed its positioning operation, and the lifting motion of the jack is stopped; Step 5: Repeating step 4 for each lift jack until all lift jacks have completed the positioning phase, stopped lifting, and completed overall positioning; Start the actual lift and measure the jack displacement sensor values ​​L corresponding to the four lift jacks. 0n The actual lifting process is started from this point, and the initial operating speed of the four lifting jacks is V 0n Step 6, where During the lifting process, the measured value of each jack displacement sensor L 1n The actual lift amount L of the parts corresponding to the four jacks is monitored in real time. Δnリフト The actual lift amount is calculated by L Δnリフト =L 1n -L 0n and the target lift height of each lift jack is L ｎ In combination with this, the lift progress Per of each lift jack (3) nリフト Calculate [0012] and the lift progress of the four lift jacks Per nリフト Step 7: Determine whether or not the track slab has tilted due to the non-coordination of the lift of the jack based on the result of the above. If tilting has occurred, jump to step 8. If tilting has not occurred, jump to step 9. Step 8: after the track slab tilts, correct the tilt by adjusting the operating speed of the corresponding lift jack; Step 9: when the lift height approaches the target lift height, the speed of each lift jack is generally reduced until the target lift height is reached smoothly, in order to improve the control accuracy of the lift height and the lift stability; Lift progress of each lift jack Per nリフト Based on the result, it is determined whether any jack has reached the target lift height, and Per nリフト If ≥ 1, the jack reaches the target lift height, and the lifting motion of the corresponding lifting jack is stopped; nリフト If <1, the jack has not reached the target lift height and continues the lift, step 10; Determine whether all jacks have reached the target lift height. If YES, complete the lifting operation of the target track slab; If NO, jump to step 7 and continue the intelligent lift operation step 11; Step 12: after completing the lifting of the track slab, starting the repair work of the track slab; Step 13: performing a descent process after completing the target orbit slab repair work; Starting from the current height of the track slab, n Step 14: setting the target descending distance of the track slab as the target descending distance of the track slab, and realizing that the track slab descends according to the lift trajectory; During the track slab lowering process, the measured values ​​of each jack displacement sensor L 1n The actual lowering amount L of the parts corresponding to the four jacks is monitored in real time. Δn降下 The actual descent amount is calculated as L Δn降下 =L 0n +L n -L 1n and Target lowering height L of each lift jack ｎ Combined with the descent progress of each lift jack Per ｎ降下 Calculate [0013] and Lifting progress of four lift jacks Per n降下 Step 15: Determine whether or not the track slab has tilted due to the non-coordinated descent of the jack based on the result of the above. If tilting has occurred, jump to step 16. If tilting has not occurred, jump to step 17. Step 16: after the track slab tilts, the tilt needs to be corrected by adjusting the operation speed of the corresponding lifting jack; During the track slab lowering process, the stress value F of each lift jack Δn is calculated in real time, and the lift jack stress value F is calculated when the lift jack descends to the underside of the track slab and contacts the top surface of the repaired track slab groove. Δn suddenly becomes small, and the critical stress threshold F 臨界 Step 17: after the stress of a lifting jack falls to the critical stress threshold, determine that the corresponding lifting jack has completed the lowering operation, and stop the lowering motion of the jack; Step 18: determine whether all jacks have stopped descending; if yes, complete the descent of the target track slab; if no, jump to step 15 and continue the descent process; and (c) step 19, after completing the lowering of the track slab, setting all the lift jacks to lower at the maximum speed and completing the return of the jacks.

2. In step 4, the stress value of the lifting jack is calculated according to the hydraulic oil contact surface in the jack cylinder and the corresponding hydraulic pressure value of the jack. The hydraulic oil contact surface in the jack cylinder belongs to the manufacturing size of the jack and is a known value. The diameter of the contact surface is known as D. The hydraulic pressure value P of each jack monitored in real time is 1n , i.e., the corresponding P of the four jacks 11 , P 12 , P 13 , P 14 Combined with this, real-time stress changes of the jack are calculated, [0014] and (1) F Δn ≧F 臨界 If so, stop lifting the corresponding jack, (2) if not, continue lifting. The method for multi-point coordinated intelligent lifting of track slabs according to claim 1,

3. The method for determining the inclination in step 7 is as follows: Lifting progress of four lift jacks Per １リフト , Per ２リフト , Per ３リフト , Per ４リフト Arrange in order of size, and the fastest progress Per maxリフト and slowest progress Per minリフト , and obtain the maximum progress difference between the four lift jacks. Δmaxリフト =Per maxリフト -Per minリフト and Maximum progress difference threshold Per Δ臨界 Set (1) Per Δmaxリフト ≧Per Δ臨界 If so, determine that the track slab has tilted, and jump to step 8; (2) If not, it is not tilted, and jump to step 9.

4. In step 8, the real-time lift progress of the four lift jacks is calculated. nリフト Based on average progress Per 平均 Calculate [Equation 15] Then, the difference between the lift progress of each jack and the average progress, Per Δnリフト Calculate Per Δnリフト =Per nリフト -Per 平均 and thus the corresponding velocity V after adjustment of the lift jack (3) 1n Calculate V 1n = V element n + Per Δnリフト ×ePs, However, V 元ｎ is the speed before adjustment of the corresponding jack, and V 元ｎ is the initial operating speed V 0ｎ 2. The method for multi-point coordinated intelligent lifting of track slabs according to claim 1, wherein ePs is equal to the speed adjustment calculation coefficient.

5. In step 9, the deceleration threshold Per 減速 In the lifting process, the lifting progress of each lift jack (3) is compared in real time, and the lifting progress is nリフト ≧Per 減速 If so, enter the deceleration process, otherwise jump to step 7; However, Per 減速 is the deceleration threshold, which is a fixed value, and the lift jack will start the deceleration process when the lift progress exceeds this value; For the lift jack (3) entering the deceleration process, its operating speed V 1n V 1n減速 Adjust to V 1n減速 =V 1n ×ePs 減速 and However, ePs 減速 is a deceleration coefficient, which is a fixed value, and the specific value is determined by the user's selection of the operating speed level, which is divided into three stages: high speed, medium speed, and low speed, and each stage corresponds to a different deceleration coefficient.

6. The method for determining the inclination in step 15 is as follows: 4 lift jacks lowering progressPer １降下 , Per 2降下 , Per 3降下 , Per 4降下 Arrange in order of size, and the fastest progress Per max降下 and slowest progress Per min降下 , and obtain the maximum progress difference between the four lift jacks. Δmax降下 =Per max降下 -Per min降下 and the maximum progress difference threshold Per Δ臨界 Take (1) Per Δmax降下 ≧Per Δ臨界 If so, the track slab is tilted, jump to step 16; (2) If not, it is not tilted, and jump to step 17.

7. In step 16, the real-time lift progress Per n降下 Based on average progress Per 平均 Calculate [0016] Next, the difference Per between the lift progress of each jack and the average progress Δn降下 Calculate For Δn降下 =For n降下 -For 平均 This results in a corresponding velocity V after adjustment of the lift jack (3). 1n Calculate V １ｎ =V 元ｎ Per Δn降下 ×ePs The method for multi-point coordinated intelligent lifting of track slabs according to claim 1, wherein ePs is a speed adjustment calculation coefficient.

8. A lifting device for realizing the multi-point coordinated intelligent lifting method for track slabs according to any one of claims 1 to 7, comprising a lifting device body, a measurement control tablet and a lifting jack, wherein the lifting device body and the measurement control tablet are connected via wireless communication, and the lifting device body is connected to the lifting jack via a jack oil pipe, A lift device characterized in that a jack placement area for storing and moving a lift jack is provided at the front end of the lift device body, a push means may be provided at the rear of the lift device body, and a plurality of casters are provided at the bottom.

9. 9. The lifting device according to claim 8, wherein the lifting jack comprises a jack displacement sensor, a jack lifting leg, a jack lifting head and a jack lifting column, the jack lifting leg and the jack lifting head are integrally installed to form a vertical steel structure and a staircase-shaped structure, and the tip of the jack lifting column and the jack lifting head are connected by a screw.

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