Multi-point cooperative intelligent jacking apparatus and method for track slab

Abstract

A multi-point cooperative intelligent jacking apparatus and method for a track slab. The jacking apparatus comprises a jacking apparatus main machine (1), a measurement and control tablet computer (2) and jacking jack (3), wherein the jacking apparatus main machine (1) is connected to the measurement and control tablet computer (2) by means of wireless communication; the jacking apparatus main machine (1) is connected to the jacking jack (3) by means of a jack oil pipe (4); a jack placement region (14) is provided at a front end of the jacking apparatus main machine (1), such that the jacking jack (3) is stored in the jack placement region to move; and a pushing handle (11) may be provided at a rear portion of the jacking apparatus main machine (1), and a plurality of universal wheels (12) are provided at the bottom of the jacking apparatus main machine. The apparatus has the advantages of synchronization, intelligence and accuracy of a crane and a hoist apparatus for jacking the track slab, and portability and universality of an artificial hydraulic jack for jacking the track slab; and the apparatus can adapt to construction in the current terrain environment for laying the track slab, and is equipped with an intelligent measurement and control system, so that one-key starting and automatic stopping are achieved, and a jacking operation of the track slab can be precisely and conveniently completed with less manpower input.

Description

Track slab multi-point collaborative intelligent jacking equipment and method Technical Field

[0001] The present invention relates to the technical field, and in particular to a track plate multi-point coordinated intelligent jacking device and method. Background Art

[0002] Precast track slabs are precast concrete components widely used in railway construction. With the acceleration of urbanization and the growing demand for urban rail transit, the market for precast track slabs is also expanding. Furthermore, strong national support for urban rail transit construction and the introduction of relevant policies have also promoted the application of precast track slabs. Today, precast track slabs, due to their high construction efficiency, high flatness, and high stability, play a vital role in high-speed rail lines, subway lines, and urban rail transit lines.

[0003] Prefabricated track slabs are increasingly used in rail transit projects, and this has also led to some problems. After construction, the prefabricated track slabs may sink over time due to uneven or unstable underlying foundations, environmental changes, construction quality, and other issues. This can affect driving safety and passenger comfort, necessitating repair and repositioning of the sunken track slabs. Currently, the common practice is to use cranes, hoists, manual hydraulic jacks, and other methods to repair the prefabricated track slabs during the window period, depending on the conditions of the construction site. However, due to the heavy equipment, low efficiency, and large errors, existing methods cannot guarantee the rapid and accurate completion of the repair and repositioning of the prefabricated track slabs within the limited window period.

[0004] To this end, in view of the above-mentioned defects, the designers of the present invention have conducted intensive research and design, and integrated the experience and achievements of many years of working in related industries to research and design a multi-point collaborative intelligent jacking equipment and method for track plates to overcome the above-mentioned defects.

[0005] Summary of the Invention

[0006] The purpose of the present invention is to provide a multi-point coordinated intelligent jacking device and method for track plates, which has the advantages of small size, high efficiency, intelligent coordination, and simple operation. It can use a small amount of manpower to complete the track plate jacking work efficiently and with high precision within the skylight time.

[0007] To achieve the above object, the present invention discloses a multi-point coordinated intelligent jacking method for a track plate, which is characterized by comprising the following steps:

[0008] Step 1: Preparation step, that is, transporting the jacking equipment to the destination and placing the four jacking jacks at the four inner corners of the track plate;

[0009] Step 2: The main lifting equipment starts working and inputs the target lifting height L of the four lifting jacks. n , start the jacking process;

[0010] Step 3: Collect the oil pressure value P of each jack when the jacking jack is started 0n , in order to monitor the oil pressure value P of each jack in real time during the subsequent jacking process 1n ;

[0011] Step 4: Calculate the force value F of each lifting jack in real time during the lifting process △n When the lifting jacks are lifted to a certain height and touch the lower surface of the track plate, the lifting jacks will be blocked due to the force value F △n Increase, so set a critical threshold F 临界 When the force value of a certain lifting jack reaches the critical force threshold, it is determined that the corresponding lifting jack has completed the positioning work and the lifting action of the jack is stopped;

[0012] Step 5: Repeat step 4 for each jacking jack until all jacking jacks have completed the positioning stage and stopped lifting, completing the overall positioning;

[0013] Step 6: Start the actual lifting and record the measured value L of the jack displacement sensor corresponding to the four lifting jacks at this time 0n , the actual lifting process begins from this point, and the initial operating speed of the four-way lifting jack is V 0n ;

[0014] Step 7: Real-time monitoring of the measured value L of each jack displacement sensor during the lifting process 1n , and simultaneously calculate the actual lifting amount L of the corresponding points of the four jacks △n升 , the actual lifting amount is calculated as L △n升 =L 1n -L 0n ; Combined with the target lifting height L of each lifting jack n , calculate the lifting progress Per of each lifting jack 3 n升 for According to the lifting progress of the four-way lifting jack n升 Determine whether the track plate is tilted due to the lack of coordination of the jacks. If tilted, skip to step eight; if not, skip to step nine.

[0015] Step 8: After the track plate tilts, correct the tilt by adjusting the operating speed of the corresponding lifting jack;

[0016] Step 9: To improve the control accuracy of the lifting height and the lifting stability, when the lifting height approaches the target lifting height, reduce the speed of each lifting jack as a whole until it reaches the target lifting height smoothly;

[0017] Step 10: According to the lifting progress of each lifting jack n升 Determine whether any jack has reached the target lifting height. If Per n升 ≥1, the jack has reached the target lifting height, stop the corresponding lifting jack lifting action, if Per n升 <1, the jack has not yet reached the target lifting height, continue to lift;

[0018] Step 11: Determine whether all jacks have reached the target lifting height;

[0019] If yes, complete the jacking work of the target track plate;

[0020] If no, skip to step 7 and continue with the intelligent lifting process;

[0021] Step 12: After the track slab is lifted, start the track slab repair work;

[0022] Step 13: After completing the repair work of the target track plate, proceed with the fallback process;

[0023] Step 14: Take the current height of the track plate as the starting point and n The target falling distance of the track plate is used to achieve the falling of the track plate according to the lifting trajectory;

[0024] Step 15: During the track plate's fall, monitor the measured values ​​L of each jack's displacement sensor in real time. 1n , and simultaneously calculate the actual fall amount L of the corresponding points of the four jacks △n落 , the actual fall is L △n落 =L 0n +L n -L 1n ;

[0025] Combined with the target drop height L of each lifting jack n , calculate the return progress of each lifting jack Per n落 for

[0026] According to the lifting progress of the four-way lifting jack n落 Determine whether the track plate tilts due to the jack's uncoordinated fall. If tilt occurs, jump to step 16; if not, jump to step 17.

[0027] Step 16: After the track plate tilts, it is necessary to correct the tilt by adjusting the operating speed of the corresponding lifting jack;

[0028] Step 17: During the track plate falling process, calculate the force value F of each lifting jack in real time △n When the lifting jack falls back to the lower surface of the track plate and contacts the upper surface of the repaired track plate groove, the lifting jack will cause the force value F △n Suddenly decrease, take the critical force threshold F in step 4 临界 When the force on a certain lifting jack drops to the critical force threshold, it is determined that the corresponding lifting jack has completed the falling work and the falling action of the jack is stopped;

[0029] Step 18: Determine whether all jacks have stopped falling back. If so, complete the falling back of the target track plate. If not, jump to step 15 to continue the falling back process.

[0030] Step 19: After the track plate is lowered, set all lifting jacks to lower at the maximum speed to complete the jack reset.

[0031] Among them: The force value of the lifting jack in step 4 is calculated by the hydraulic oil contact surface in the jack cylinder and the corresponding oil pressure value of the jack. The hydraulic oil contact surface in the jack cylinder belongs to the production size of the jack and is a known value. The known contact surface diameter is D. Combined with the real-time monitoring of the oil pressure value P of each jack 1n , four-way jack corresponds to P 11 , P 12 , P 13 , P 14 , calculate the real-time force change of the jack as

[0032] (1) If F △n ≥F 临界 , stop lifting the corresponding jack;

[0033] (2) Otherwise, continue lifting.

[0034] The tilt determination method in step 7 is as follows:

[0035] The lifting progress of the four-way lifting jack 1升 , Per 2升 , Per 3升 , Per 4升 Sort by size and get the fastest progress Per max升 and the slowest progress Per min升 , the maximum progress difference between the four lifting jacks is Per △max升 =Per max升 -Permin升 ;

[0036] Set a maximum progress difference threshold Per △临界 :

[0037] (1) If Per △max升 ≥Per △临界 , determine that the track plate is tilted, and jump to step eight;

[0038] (2) Otherwise, no tilt, skip to step nine.

[0039] Among them: In step eight, the real-time lifting progress of the four-way lifting jack is Per n升 Calculate the average progress Per 平均 for Then calculate the difference between the lifting progress of each jack and the average progress Per △n升 Per △n升 =Per n升 -Per 平均 , thus, the adjusted speed V of the lifting jack 3 is calculated 1n V 1n =V 旧n +Per △n升 *eps;

[0040] Where: V 旧n The speed before the jack is adjusted is V when the speed is adjusted for the first time. 旧n Equal to the initial running speed V 0n , eps is the speed adjustment calculation coefficient.

[0041] Among them: In step nine, according to the lifting progress of the jack, set the speed reduction threshold Per 降 During the lifting process, the lifting progress of each lifting jack 3 is compared in real time. n升 ≥Per 降 If yes, enter the deceleration process; otherwise, jump to step 7;

[0042] Where: Per 降 The deceleration threshold is a fixed value. When the lifting progress exceeds this value, the lifting jack starts the deceleration process.

[0043] For the lifting jack 3 that has entered the deceleration process, its operating speed V 1n Adjust to V 1n降 V 1n降 =V 1n *eps 降 ;

[0044] Among them: eps 降It is a fixed value and its specific value is determined by the user's choice of the running speed level. It is divided into three gears: fast, medium and slow. Each gear corresponds to a different speed reduction coefficient.

[0045] The method for determining the tilt in step 15 is as follows:

[0046] Set the four-way lifting jack's lowering progress 1落 , Per 2落 , Per 3落 , Per 4落 Sort by size and get the fastest progress Per max落 and the slowest progress Per min落 , the maximum progress difference between the four lifting jacks is Per △max落 =Per max落 -Per min落 , take the maximum progress difference threshold Per △临界 ;

[0047] (1) If Per △max落 ≥Per △临界 , the track plate tilts, jump to step 16;

[0048] (2) Otherwise, no tilt, jump to step 17.

[0049] Among them: In step 16, the real-time lifting progress Per of the four-way lifting jack 3 n落 Calculate the average progress Per 平均 :

[0050] Then calculate the difference between the lifting progress of each jack and the average progress Per △n落 : Per △n落 =Per n落 -Per 平均

[0051] Therefore, the adjusted speed V of the lifting jack 3 is calculated. 1n is: V 1n =V 旧n +Per △n落 *eps

[0052] Where: eps is the speed adjustment calculation coefficient.

[0053] Also disclosed is a jacking device for a multi-point coordinated intelligent jacking method for a track plate, comprising a jacking device host, a measurement and control flat panel, and a jacking jack. The jacking device host and the measurement and control flat panel are connected via wireless communication, and the jacking device host is connected to the jacking jack via a jack oil pipe. The invention is characterized in that:

[0054] The front end of the main body of the jacking device is provided with a jack placement area for storing the jacking jack therein for movement. The rear part of the main body of the jacking device may be provided with a push handle, and the bottom thereof is provided with a plurality of universal wheels.

[0055] Wherein: the lifting jack includes a jack displacement sensor, a jack lifting foot, a jack lifting head and a jack lifting column, the jack lifting foot and the jack lifting head are integrated and formed with a vertical steel structure. The top end of the jacking column and the jacking head are connected by a screw.

[0056] From the above content, it can be seen that the track plate multi-point coordinated intelligent jacking equipment and method of the present invention have the following effects:

[0057] 1. With the advantages of small size, high efficiency, intelligent collaboration and simple operation, it can complete the track plate lifting work efficiently and accurately within the skylight time with a small amount of manpower.

[0058] 2. It combines the synchronization, intelligence, and precision of cranes and hoists for track slab lifting with the portability and versatility of manual hydraulic jacks, making it suitable for construction in current track slab laying terrains. Equipped with an intelligent measurement and control system, it enables one-button start and automatic stop, allowing for precise and convenient track slab lifting operations with minimal manpower.

[0059] The details of the present invention can be found in the following description and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] FIG1 shows a schematic side view of the track plate multi-point coordinated intelligent jacking device of the present invention.

[0061] FIG2 shows a side and rear schematic diagram of the track plate multi-point coordinated intelligent jacking device of the present invention.

[0062] FIG3 shows a working principle diagram of the track plate multi-point coordinated intelligent jacking device of the present invention.

[0063] FIG4 shows a cross-sectional view of the structural relationship between the jack and the track plate of the present invention.

[0064] FIG5 shows a top view of the structural relationship between the jack and the track plate of the present invention.

[0065] FIG6 shows a cross-sectional view of a track slab in a tunnel before being jacked up by the track slab multi-point coordinated intelligent jacking equipment of the present invention.

[0066] FIG7 shows a flowchart of the multi-point coordinated intelligent lifting process of the present invention.

[0067] FIG8 shows the multi-point collaborative intelligent reset process of the present invention.

[0068] Description of the drawings: 1: Main unit of the jacking device; 11: Push handle; 12: Universal wheel; 13: Power plug; 14: Jack placement area; 15: Reading area; 16: Control area; 17: Jack oil pipe interface; 18: Oil level gauge; 2: Measurement and control plate; 3: Lifting jack; 31: Jack displacement sensor; 32: Jack lifting foot; 33: Jack lifting head; 34: Jack lifting column; 4: Jack oil pipe; 5: Track plate; 6: Tunnel wall; 7: Track plate groove. DETAILED DESCRIPTION

[0069] 1 , 2 and 3 , which show the track plate multi-point coordinated intelligent jacking equipment and method of the present invention.

[0070] The track plate multi-point collaborative intelligent jacking equipment and method include a jacking equipment host 1, a measurement and control flat panel 2 and a jacking jack 3. The jacking equipment host 1 and the measurement and control flat panel 2 can be connected through wireless communication, and the jacking equipment host 1 is connected to the jacking jack 3 through a jack oil pipe 4.

[0071] The front end of the jacking device main unit 1 can be provided with a jack placement area 14 to facilitate the storage and movement of the jacking jack 3 therein. The rear part of the jacking device main unit 1 can be provided with a push handle 11, and the bottom thereof can be provided with multiple universal wheels 12. Before performing maintenance work on the track plate 5, all relevant equipment can be carried like a cart to the location of the target track plate 5, which can save time, effort and maintenance costs. The side of the jacking device main unit 1 is provided with a power plug 13 and a control area 16, the top surface is provided with a reading area 15, and the front is provided with a jack oil pipe interface 17 and an oil level gauge 18.

[0072] After the track slab 5 is installed on site, the surroundings and lower portion of the track slab 5 are filled with a medium such as concrete or rubber pads, which fits tightly around the track slab 5 to form a tightly fitting track slab groove 7, as shown in FIG6 . However, when the track slab 5 needs to be repaired due to sinking, damage, or other defects, it is often necessary to lift the track slab 5 out of the track slab groove 7 first. During the lifting process, the track slab 5 is tightly fitted around the surroundings, and even a slight tilt during the lifting will cause the track slab 5 to become stuck in the track slab groove 7 and become immobile.

[0073] The lifting jack 3 comprises a jack displacement sensor 31, a jack lifting foot 32, a jack lifting head 33 and a jack lifting column 34. The jack lifting foot 32 and the jack lifting head 33 are integrated into a vertical steel structure. The top end of the jacking column 34 is connected to the jacking head 33 by a screw.

[0074] Therefore, the track plate multi-point coordinated intelligent jacking device of the present invention monitors the lifting height, speed and force of each lifting jack 3 in real time through the measurement and control flat panel 2, calculates the lifting trend 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 track plate multi-point coordinated intelligent jacking method of the present invention includes the following steps:

[0075] Step 1: Preparation step, that is, transporting the jacking equipment to the destination, placing the four jacking jacks 3 at the four inner corners of the track plate 5 (as shown in Figure 5), and extending the jacking feet 32 ​​of the four jacking jacks 3 to the bottom of the edge of the track plate 5 (as shown in Figure 4).

[0076] Among them: the placement position relationship between the four jacking jacks 3 and the track plate 5 is shown in Figure 5. After the jacking starts, the jacking equipment main unit 1 supplies oil to the four jacking jacks 3 respectively, and the jack jacking column 34 drives the jack jacking head 33 to jack upward under the oil pressure drive, and the jack jacking head 33 then drives the jack jacking foot 32 to jack upward.

[0077] Step 2: When the lifting equipment host 1 starts working, the control panel 2 can be turned on and the control program can be started on the control panel 2. The control program can establish a wireless communication connection with the lifting equipment host 1. The target lifting height L of the four lifting jacks 3 is input in the operation interface of the control program. n (The four-way lifting jacks correspond to L1, L2, L3, and L4 respectively), click Start to carry out the lifting process, and preferably, one-click start of intelligent lifting is performed on the measurement and control tablet 2.

[0078] As can be seen from step 1, the jacking foot 32 does not directly contact the track plate 5 before jacking. There is still some distance between the jacking foot 32 starting to move and the track plate 5 actually starting to lift. The jacking foot 32 must first rise a certain distance before contacting the track plate 5 before actually lifting. This phase is called the "positioning phase" of the jacking jack 3. During this phase, the jacking jack 3 is in a zero-load state, and the oil pressure of each jack is stable.

[0079] The target lift height refers to the height to which the track slab 5 is lifted. Obviously, this height does not include the distance lifted by the lift jacks 3 during the installation phase, during which the track slab 5 does not move. The target lift heights L1, L2, L3, and L4 are the differences in the elongation of the lift jacks 3 between the end of the installation phase and the completion of the final lift.

[0080] Step 3: Collect the oil pressure values ​​P of each jack when the lifting jack 3 is just started 0n (Four-way jack corresponds to P 01 , P 02 , P03 , P 04 ). In the subsequent lifting process, the oil pressure value P of each jack is monitored in real time. 1n (Four-way jack corresponds to P 11 , P 12 , P 13 , P 14 ).

[0081] Step 4: Calculate the force value F of each lifting jack 3 in real time during the lifting process △n When the lifting jacks 3 are lifted to a certain height and contact the lower surface of the track plate 5, the lifting jacks 3 will be blocked due to the force value F △n Increase, so set a critical threshold F 临界 When the force value of a certain lifting jack 3 reaches the critical force threshold, it is determined that the corresponding lifting jack 3 has completed the positioning work and the lifting action of the jack is stopped.

[0082] Among them: the force value of the lifting jack 3 can be calculated by the hydraulic oil contact surface in the jack cylinder and the corresponding oil pressure value of the jack. The hydraulic oil contact surface in the jack cylinder belongs to the production size of the jack and is a known value. The known contact surface diameter is D. Combined with the real-time monitoring of the oil pressure value P of each jack 1n (Four-way jack corresponds to P 11 , P 12 , P 13 , P 14 ), calculate the real-time force change of the jack as

[0083] (1) If F △n ≥F 临界 , stop lifting the corresponding jack;

[0084] (2) Otherwise, continue lifting.

[0085] Step 5: Repeat step 4 for each jacking jack until all jacking jacks 3 have completed the positioning stage and stopped lifting, completing the overall positioning and starting the subsequent intelligent jacking process.

[0086] Step 6: From this step, the track plate 5 begins to actually lift, and the measured values ​​L of the jack displacement sensors 31 corresponding to the four lifting jacks 3 are recorded at this time. 0n (Four-way jack corresponds to L 01 , L 02 , L 03 , L 04 ), and the actual lifting process begins from this point. At this time, the initial operating speed of the four-way lifting jack 3 is V 0n (Four-way jack corresponds to V01 , V 02 , V 03 , V 04 ).

[0087] Step 7: Real-time monitoring of the measured value L of each jack displacement sensor 31 during the lifting process 1n (Four-way jack corresponds to L 11 , L 12 , L 13 , L 14 ), and simultaneously calculate the actual lifting amount L of the corresponding points of the four jacks △n升 , the actual lifting amount is calculated as L △n升 =L 1n -L 0n .

[0088] Combined with the target lifting height L of each lifting jack 3 n (Four jacks correspond to L1, L2, L3, L4), calculate the lifting progress Per of each lifting jack 3 n升 for

[0089] According to the lifting progress of four-way lifting jack 3 n升 Determine whether the track plate 5 is tilted due to the jacking incoordination. The judgment method is as follows:

[0090] Set the lifting progress of four-way lifting jack 3 to Per 1升 , Per 2升 , Per 3升 , Per 4升 Sort by size and get the fastest progress Per max升 and the slowest progress Per min升 , the maximum progress difference between the four lifting jacks 3 is Per △max升 =Per max升 -Per min升 .

[0091] Set a maximum progress difference threshold Per △临界 :

[0092] (1) If Per △max升 ≥Per △临界 , determine that the track plate 5 is tilted, and jump to step eight;

[0093] (2) Otherwise, no tilt, skip to step nine.

[0094] Among them: before the track plate 5 is lifted, it may be in a tilted state due to uneven sinking, and the plate is filled with fillers such as rubber pads around it, forming a tightly fitting track plate groove 7 around and below the track plate 5. There is no gap or a very small gap between the track plate 5 and the track plate groove 7. If the four jacks are not lifted in a coordinated manner, the track plate 5 may tilt, causing the track plate 5 to be stuck in the track plate groove 7 due to the tilt and unable to move up or down. Therefore, during the lifting process of the track plate 5, the lifting actions of the four jacks should be adaptively coordinated according to the initial posture of the track plate 5 to ensure coordinated lifting of multiple points to achieve accuracy and safety in the lifting process.

[0095] Step 8: After the track plate 5 tilts, the tilt is corrected by adjusting the operating speed of the corresponding lifting jack 3.

[0096] Among them: the operating speed of the jack depends on the speed at which the main unit 1 of the jacking equipment presses the hydraulic oil into the jack. The hydraulic oil flow of each jack is controlled by a hydraulic electromagnetic proportional valve, which is determined by the opening and closing degree of the hydraulic electromagnetic proportional valve, and the opening and closing degree of the hydraulic electromagnetic proportional valve changes with the input control voltage. It can be seen from this that the operating speed of the jack cannot be directly controlled, but is indirectly controlled by the input voltage of the hydraulic electromagnetic proportional valve. Due to factors such as the production error of the jack and the different working pressures of the oil circuits corresponding to each jack, there is no clear conversion relationship between the input voltage value of the hydraulic electromagnetic proportional valve and the operating speed of the jack, which greatly increases the difficulty of coordination. Therefore, in order to ensure the coordinated lifting between the various jacks, a set of intelligent lifting methods for the lifting jack 3 is designed to achieve dynamic and real-time adjustment of the corresponding operating speed according to the tilt posture of the track plate 5.

[0097] Specifically, according to the real-time lifting progress of the four-way lifting jack 3, n升 Calculate the average progress Per 平均 for

[0098] Then calculate the difference between the lifting progress of each jack and the average progress Per △n升 Per △n升 =Per n升 -Per 平均 .

[0099] Therefore, the adjusted speed V of the lifting jack 3 is calculated. 1n V 1n =V 旧n +Per △n升 *eps.

[0100] Where: V 旧n The speed before the jack is adjusted is V when the speed is adjusted for the first time. 旧n Equal to the initial running speed V0n .

[0101] Among them: eps is the speed adjustment calculation coefficient, which is a fixed value. The specific value is determined by the user's selection of the running speed level. It is divided into three gears: fast, medium and slow. Each gear corresponds to a fixed calculation coefficient.

[0102] Step 9: In order to improve the control accuracy of the lifting height and the lifting stability, when the lifting height approaches the target lifting height (for example, when the lifting height reaches 10% of the target lifting height), the speed of each lifting jack 3 is reduced as a whole until the target lifting height is reached smoothly.

[0103] According to the lifting progress of the jack, set the speed reduction threshold Per 降 During the lifting process, the lifting progress of each lifting jack 3 is compared in real time. n升 ≥Per 降 If yes, enter the deceleration process; otherwise, jump to step 7.

[0104] Where: Per 降 The deceleration threshold is a fixed value. When the lifting progress exceeds this value, the lifting jack starts the deceleration process.

[0105] For the lifting jack 3 that has entered the deceleration process, its operating speed V 1n Adjust to V 1n降 V 1n降 =V 1n *eps 降 .

[0106] Among them: eps 降 It is a fixed value and its specific value is determined by the user's choice of the running speed level. It is divided into three gears: fast, medium and slow. Each gear corresponds to a different speed reduction coefficient.

[0107] Step 10: According to the lifting progress of each lifting jack 3 n升 Determine whether any jack has reached the target lifting height.

[0108] If Per n升 ≥1, the jack has reached the target lifting height, and the lifting action of the corresponding lifting jack 3 is stopped.

[0109] If Per n升 <1, the jack has not reached the target lifting height, continue to lift.

[0110] Step 11: Determine whether all jacks have reached the target lifting height.

[0111] If yes, the intelligent lifting work of the target track plate 5 is completed.

[0112] If no, skip to step 7 and continue with the intelligent lifting process.

[0113] Step 12: After the track plate 5 is lifted, the maintenance personnel begin to repair the track plate 5.

[0114] Step 13: After completing the repair work of the target track plate 5, the lowering process is carried out. You can click the lowering button on the measurement and control flat panel 2 to start the one-key lowering process.

[0115] Step 14: When the track plate 5 falls back, since the repair work has been done in the track plate groove 7 and the impact on the height of the four corners of the track plate groove 7 is unknown, it is impossible to determine how far the four corners of the track plate 5 need to fall back. However, it is foreseeable that if the track plate 5 falls back according to the lifting trajectory, it will not cause tilting or getting stuck in the track plate groove 7. Therefore, taking the current height of the track plate 5 as the starting point, the height of the track plate 5 is calculated based on the height of L. n (The four jacks correspond to L1, L2, L3, and L4) for the target falling distance of the track plate 5, so that the track plate 5 can fall back according to the jacking trajectory.

[0116] Among them: When the track plate 5 falls back, the actual height of the four corners will usually be less than L n , but to ensure that the track plate 5 falls back smoothly, L n The target fall distance is L. After the track plate 5 is completed, the actual fall distance of the lifting jack 3 is less than L. n It doesn't matter anymore, just continue lowering until the jack stroke returns to zero.

[0117] Step 15: During the falling process of the track plate 5, the measured values ​​L of the displacement sensors 31 of each jack are monitored in real time. 1n (Four-way jack corresponds to L 11 , L 12 , L 13 , L 14 ), and simultaneously calculate the actual fall amount L of the corresponding points of the four jacks △n落 , the actual fall is L △n落 =L 0n +L n -L 1n .

[0118] Combined with the target fall height L of each lifting jack 3 n (Four jacks correspond to L1, L2, L3, L4), calculate the return progress Per of each lifting jack 3 n落 for

[0119] According to the lifting progress of four-way lifting jack 3n落 Determine whether the track plate 5 is tilted due to the jack's uncoordinated fall. The determination method is as follows:

[0120] Set the return progress of the four-way lifting jack 3 to Per 1落 , Per 2落 , Per 3落 , Per 4落 Sort by size and get the fastest progress Per max落 and the slowest progress Per min落 , the maximum progress difference between the four lifting jacks 3 is Per △max落 =Per max落 -Per min落 .

[0121] Take the maximum progress difference threshold Per in step 7 △临界 :

[0122] (1) If Per △max落 ≥Per △临界 , the track plate 5 tilts, jump to step 16;

[0123] (2) Otherwise, no tilt, jump to step 17.

[0124] Step 16: After the track plate 5 tilts, it is necessary to correct the tilt by adjusting the operating speed of the corresponding lifting jack 3. The speed adjustment is based on the principle of accelerating if the progress is too slow and decelerating if the progress is too fast.

[0125] According to the real-time lifting progress of the four-way lifting jack 3 n落 Calculate the average progress Per 平均 :

[0126] Then calculate the difference between the lifting progress of each jack and the average progress Per △n落 : Per △n落 =Per n落 -Per 平均

[0127] Therefore, the adjusted speed V of the lifting jack 3 is calculated. 1n is: V 1n =V 旧n +Per △n落 *eps

[0128] Where: eps is the speed adjustment calculation coefficient, and its value is the same as the eps definition in step 8.

[0129] Step 17: During the falling process of the track plate 5, calculate the force value F of each lifting jack 3 in real time △nWhen the lifting jack 3 falls back to the lower surface of the track plate 5 and contacts the upper surface of the repaired track plate groove 7, the lifting jack 3 will cause the force value F △n Suddenly decrease, take the critical force threshold F in step 4 临界 When the force on a certain lifting jack 3 drops to the critical force threshold, it is determined that the corresponding lifting jack 3 completes the falling work and the falling action of the jack is stopped.

[0130] Step 18: Determine whether all jacks have stopped falling.

[0131] If yes, the one-key return operation of the target track plate 5 is completed.

[0132] If not, jump to step 15 to continue the fallback process.

[0133] Step 19: At this point, the four corners of the track plate 5 have contacted the track plate groove 7, completing the intelligent coordinated fall of the track plate 5. Then, all the lifting jacks 3 are set to fall back at the maximum speed until the extension of all the lifting jacks 3 returns to zero, completing the jack reset.

[0134] It can be seen from this that the present invention has the following advantages:

[0135] 1. With the advantages of small size, high efficiency, intelligent collaboration and simple operation, it can complete the track plate lifting work efficiently and accurately within the skylight time with a small amount of manpower.

[0136] 2. It combines the synchronization, intelligence, and precision of cranes and hoists for track slab lifting with the portability and versatility of manual hydraulic jacks, making it suitable for construction in current track slab laying terrains. Equipped with an intelligent measurement and control system, it enables one-button start and automatic stop, allowing for precise and convenient track slab lifting operations with minimal manpower.

[0137] It is obvious that the above description and description are only examples and are not intended to limit the disclosure, application or use of the present invention. Although the embodiments have been described in the embodiments and the embodiments are described in the drawings, the present invention is not limited to the specific examples illustrated in the drawings and described in the embodiments as the best mode currently believed to implement the teachings of the present invention. The scope of the present invention will include any embodiment falling within the above description and the appended claims.

Claims

1. A multi-point coordinated intelligent lifting method for a track plate, characterized in that The following steps are included: Step 1: Preparation step, that is, transporting the lifting equipment to the destination and placing four lifting jacks at the four inner corners of the track plate; Step 2: The main lifting equipment starts working and inputs the target lifting height L of the four lifting jacks. n , start the lifting process; Step 3: Collect the oil pressure value P of each jack when the lifting jack is started 0n , so as to monitor the oil pressure value P of each jack in real time during the subsequent lifting process 1n ; Step 4: Calculate the force value F of each lifting jack in real time during the lifting process △n When the lifting jacks are lifted to a certain height and touch the lower surface of the track plate, the lifting jacks will be blocked and the force value F △n Increase, so set a critical threshold F 临界 When the force value of a certain lifting jack reaches the critical force threshold, it is determined that the corresponding lifting jack has completed the positioning work and the lifting action of the jack is stopped; Step 5: Repeat step 4 for each lifting jack until all lifting jacks have completed the positioning stage and stopped lifting, completing the overall positioning; Step 6: Start the actual lifting and record the measured values ​​L of the jack displacement sensors corresponding to the four lifting jacks at this time 0n , and the actual lifting process begins from this point. At this time, the initial operating speed of the four-way lifting jack is V 0n ; Step 7: Real-time monitoring of the measured value L of each jack displacement sensor during the lifting process 1n , and simultaneously calculate the actual lifting amount L of the corresponding points of the four jacks △n升 The actual lifting amount is calculated as L △n升 =L 1n -L 0n ; Combined with the target lifting height L of each lifting jack n , calculate the lifting progress Per of each lifting jack 3 n升 for According to the lifting progress of the four-way lifting jack n升 Determine whether the track plate tilts due to the jacking uncoordinated. If tilt occurs, jump Go to step 8, if it is not tilted, skip to step 9; Step 8: After the track plate tilts, correct the tilt by adjusting the running speed of the corresponding lifting jack; Step 9: In order to improve the control accuracy of the lifting height and the stability of the lifting, when the lifting height is close to the target lifting height, the speed of each lifting jack is reduced as a whole until it reaches the target lifting height smoothly; Step 10: According to the lifting progress of each lifting jack n升 Determine whether any jack has reached the target lifting height. If Per n升 ≥1, the jack has reached the target lifting height, stop the corresponding lifting jack lifting action, if Per n升 <1, the jack has not reached the target lifting height, continue lifting; Step 11: Determine whether all jacks have reached the target lifting height; If yes, complete the lifting work of the target track plate; If no, jump to step 7 and continue the intelligent lifting work; Step 12: After the track slab is lifted, start the track slab repair work; Step 13: After completing the repair work of the target track plate, proceed with the fallback process; Step 14: Take the current height of the track plate as the starting point and n The target falling distance of the track plate is used to realize the falling of the track plate according to the lifting trajectory; Step 15: During the fall of the track plate, monitor the measured value L of each jack displacement sensor in real time. 1n , and simultaneously calculate the actual fall amount L of the corresponding points of the four jacks △n落 , the actual fall is L △n落 =L 0n +L n -L 1n ; Combined with the target drop height L of each lifting jack n , calculate the return progress Per of each lifting jack n落 for According to the lifting progress of the four-way lifting jack n落 Determine whether the track plate is tilted due to the uncoordinated fall of the jacks. If tilted, jump to step 16; if not, jump to step 17; Step 16: After the track plate tilts, it is necessary to correct the tilt by adjusting the running speed of the corresponding lifting jack; Step 17: During the falling process of the track plate, calculate the force value F of each lifting jack in real time △n When the lifting jack falls back to the lower surface of the track plate and contacts the upper surface of the repaired track plate groove, the lifting jack will cause a force value F △n Suddenly decrease, take the critical stress threshold F in step 4 临界 When the force on a certain lifting jack drops to the critical threshold, it is determined that the corresponding lifting jack has completed the falling back work, and the falling back action of the jack is stopped; Step 18: Determine whether all jacks have stopped falling back. If so, complete the falling back of the target track plate. If not, jump to step 15 to continue the falling back process. Step 19: After the track plate is lowered, set all lifting jacks to fall back at the maximum speed to complete the jack reset.

2. The multi-point coordinated intelligent lifting method of the track plate according to claim 1, characterized in that: In step 4, the force value of the lifting jack is calculated by the hydraulic oil contact surface in the jack cylinder and the corresponding oil pressure value of the jack. The hydraulic oil contact surface in the jack cylinder belongs to the production size of the jack and is a known value. The known contact surface diameter is D. Combined with the real-time monitoring of the oil pressure values ​​P of each jack 1n , four-way jack corresponds to P 11 , P 12 , P 13 , P 14 , calculate the real-time force change of the jack as (1) If F △n ≥F 临界 , stop lifting the corresponding jack; (2) Otherwise, continue lifting.

3. The track slab multi-point coordinated intelligent lifting method according to claim 1, characterized in that: The tilt determination method in step 7 is as follows: The lifting progress of the four-way lifting jack 1升 , Per 2升 , Per 3升 , Per 4升 Sort by size and get the fastest progress Per max升 and the slowest progress Per min升 , the maximum progress difference between the four lifting jacks is Per △max升 =Per max升 -Per min升 ; Set a maximum progress difference threshold Per △临界 : (1) If Per △max升 ≥Per △临界 , determine that the track plate is tilted, and jump to step eight; (2) Otherwise, no tilt, jump to step 9.

4. The track slab multi-point coordinated intelligent lifting method according to claim 1, characterized in that: In step eight, according to the real-time lifting progress of the four-way lifting jack, n升 Calculate the average progress Per 平均 for Then calculate the difference between the lifting progress of each jack and the average progress Per △n升 Per △n升 =Per n升 -Per 平均 , thus, the adjusted speed V of the lifting jack 3 is calculated 1n V 1n =V 旧n +Per △n升 *eps; Where: V 旧n The speed before the jack is adjusted is V when the speed is adjusted for the first time. 旧n Equal to the initial running speed V 0n , eps is the speed adjustment calculation coefficient.

5. The track slab multi-point coordinated intelligent lifting method according to claim 1, characterized in that: In step 9, set the speed reduction threshold Per according to the lifting progress of the jack. 降 During the lifting process, the lifting progress of each lifting jack 3 is compared in real time. n升 ≥Per 降 If the speed is lowered, the process will be started; otherwise, the process will go to step 7. Where: Per 降 The deceleration threshold is a fixed value. When the lifting progress exceeds this value, the lifting jack starts the deceleration process; For the lifting jack 3 that enters the deceleration process, its running speed V 1n Adjust to V 1n降 V 1n降 =V 1n *eps 降 ; Among them: eps 降 is the speed reduction coefficient, which is a fixed value. The specific value is determined by the user's preference on the running speed. It depends on the level selection, which is divided into three gears: fast, medium and slow, and each gear corresponds to a different speed reduction coefficient.

6. The multi-point coordinated intelligent lifting method of the track plate according to claim 1, characterized in that: The method for determining the tilt in step 15 is as follows: The four-way lifting jack will be lowered 1落 , Per 2落 , Per 3落 , Per 4落 Sort by size and get the fastest progress Per max落 and the slowest progress Per min落 , the maximum progress difference between the four lifting jacks is Per △max落 =Per max落 -Per min落 , take the maximum progress difference threshold Per △临界 ; (1) If Per △max落 ≥Per △临界 , the track plate tilts, jump to step 16; (2) Otherwise, no tilt, jump to step 17.

7. The track slab multi-point coordinated intelligent lifting method according to claim 1, characterized in that: In step 16, according to the real-time lifting progress of the four-way lifting jack 3, n落 Calculate the average progress Per 平均 : Then calculate the difference between the lifting progress of each jack and the average progress Per △n落 : For △n落 =For n落 -For 平均 Thus, the adjusted speed V of the lifting jack 3 is calculated. 1n for: V 1n =V 旧n +Per △n落 *eps Where: eps is the speed adjustment calculation coefficient.

8. A lifting device for realizing the multi-point coordinated intelligent lifting method of the track plate described in any one of claims 1 to 7, comprising a lifting device host, a measurement and control flat panel and a lifting jack, wherein the lifting device host and the measurement and control flat panel are connected via wireless communication, and the lifting device host is connected to the lifting jack via a jack oil pipe, characterized in that: The front end of the lifting equipment mainframe is provided with a jack placement area to accommodate the lifting jack For movement, a push handle may be provided at the rear of the main body of the jacking device, and a plurality of universal wheels may be provided at the bottom thereof.

9. The track plate multi-point coordinated intelligent lifting device according to claim 8, characterized in that: The lifting jack comprises a jack displacement sensor, a jack lifting foot, a jack lifting head and a jack lifting column. The jack lifting foot and the jack lifting head are integrally arranged and are formed with a vertical steel structure. The structure is characterized in that the top end of the jacking column is connected to the jacking head by a screw rod.

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