An intelligent inflow and outflow mold system and intelligent inflow and outflow mold method for a secondary lining trolley

Abstract

The present invention discloses an intelligent mold opening and closing system and intelligent mold opening and closing method for a secondary lining trolley, comprising a left mold folding cylinder, a right mold folding cylinder, a lifting cylinder, a supporting device and a hydraulic power device, wherein the left mold folding cylinder is connected to a column connecting member and a side mold connecting member on the left side; the right mold folding cylinder is connected to a column connecting member and a side mold connecting member on the right side; the supporting device comprises a lower longitudinal beam, a middle longitudinal beam, a supporting column and an upper longitudinal beam, and the lifting cylinder controls the lifting and lowering of the top mold through the supporting device; the hydraulic power device comprises a synchronous valve, a pressure-maintaining valve, a pressure valve, an oil pipe and a hydraulic station, which are used to control the synchronous action of the left mold folding cylinder, the right mold folding cylinder and the lifting cylinder. The present invention reduces the dependence of the secondary lining trolley on mechanical support structural parts by improving the design of the hydraulic system, simplifies the system structure, and retains and optimizes the existing functions, thereby realizing a more intelligent, convenient and efficient operation of the opening and closing mold.

Description

Technical Field

[0001] The present invention belongs to the technical field of tunnel construction, and in particular relates to an intelligent expansion and contraction mold system and an intelligent expansion and contraction mold method for a secondary lining trolley. Background Art

[0002] The role of the secondary lining trolley in tunnel construction is to provide a stable formwork support system for concrete pouring. The common secondary lining trolley retractable and extended formwork structure usually adopts four vertical cylinders, such as Figure 1 As shown, the extension and retraction of these cylinders are controlled by four reversing valve handles. During operation, construction workers need to ensure the synchronization of the four cylinders, and this synchronization completely relies on the experience of manual operation to adjust the control of the reversing valve handle. After the side form of this system is retracted and folded, the construction workers need to tighten the bracket support jack to tighten the bracket longitudinal beam, and unscrew the side jack to tighten the jack connecting beam, so that the upper and lower formwork assemblies are tightly combined. In order to prevent the hydraulic system from depressurizing and causing the formwork to retract, multiple mechanical supports are required. These supports are usually heavy, and multiple workers are required to cooperate in manually tightening the adjustment screw during the construction process, and lift each support into place one by one. This traditional structure is complicated to operate in actual use, and requires high experience and physical strength from the construction workers.

[0003] Although the existing secondary lining trolley expansion and contraction formwork technology can achieve the basic fixation and contraction of the formwork, it still has many shortcomings. First, this technology requires construction personnel to manually adjust the reversing valve handle to achieve the synchronous movement of the four cylinders, which relies entirely on manual experience, is complex to operate and has low efficiency. Secondly, after the hydraulic support is completed, mechanical supports are still required as backup supports. This type of mechanical support is not only heavy, but also requires multiple workers to manually tighten the adjustment screw to complete the fixation, which significantly increases the construction process and manual operation time. In addition, the structural design of the mechanical support leads to an increase in the deadweight of the trolley, and it is prone to bending and deformation during long-term use, which not only affects construction safety, but also requires frequent replacement, further increasing construction costs and maintenance difficulties. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention proposes an intelligent inflow and outflow mold system and intelligent inflow and outflow mold method for the secondary lining trolley, which aims to transform the traditional inflow and outflow mold of the secondary lining trolley that relies on manual operation into an intelligently controlled automated system. By improving the design of the hydraulic system, the present invention reduces the dependence of the secondary lining trolley on mechanical support structural parts, simplifies the system structure, and retains and optimizes the existing functions, thereby realizing a more intelligent, convenient and efficient inflow and outflow mold operation.

[0005] To achieve the above object, the technical solution of the present invention is as follows:

[0006] A smart mold retracting and extending system for a second lining trolley comprises a left mold folding cylinder, a right mold folding cylinder, a lifting cylinder, a supporting device and a hydraulic power device, wherein the left mold folding cylinder is connected to a left column connecting member and a side mold connecting member, and is used to control the contraction and expansion of the left mold; the right mold folding cylinder is connected to a right column connecting member and a side mold connecting member, and is used to control the contraction and expansion of the right mold; the supporting device comprises a lower longitudinal beam, a middle longitudinal beam, a supporting column and an upper longitudinal beam, the lifting cylinder is installed on the lower longitudinal beam, and is connected to the middle longitudinal beam through a lifting cylinder connecting member, support columns are symmetrically arranged on both sides of the middle longitudinal beam, the upper longitudinal beam is arranged at the top ends of the support columns on both sides, the upper longitudinal beam is fixed to the top mold, and the lifting cylinder controls the lifting and lowering of the top mold through the supporting device; the hydraulic power device comprises a synchronous valve, a pressure-maintaining valve, a pressure valve, an oil pipe and a hydraulic station, and is used to control the synchronous action of the left mold folding cylinder, the right mold folding cylinder and the lifting cylinder.

[0007] Preferably, the synchronization valve is connected to the hydraulic station to control the synchronous action of the left mold folding cylinder, the right mold folding cylinder and the lifting cylinder; the pressure maintaining valve is connected to the hydraulic station to prevent the template from shrinking after the hydraulic system is depressurized; the pressure valve is connected to the hydraulic station to control the extension and retraction stroke of the cylinder according to a preset pressure range; the oil pipes are respectively connected to the left mold folding cylinder, the right mold folding cylinder and the lifting cylinder.

[0008] Preferably, lifting and transverse movement mechanisms are provided at both ends of the lower longitudinal beam of the supporting device, and the lifting cylinder is provided between the lifting and transverse movement mechanism and the middle longitudinal beam.

[0009] Preferably, four guide mechanisms are arranged between the middle longitudinal beam and the lower longitudinal beam of the supporting device, four guide square openings are opened on the lower longitudinal beam, and the front end of the guide mechanism passes through the guide square openings. Under the action of the lifting cylinder, the relative position of the middle longitudinal beam and the lower longitudinal beam can be adjusted.

[0010] Preferably, a transverse movement device is fixed at the bottom of the jacking and transverse movement mechanism.

[0011] Preferably, the hydraulic station realizes automated operation through a PLC control program, and the PLC control program is used to realize synchronous extension and retraction of the left mold folding cylinder, the right mold folding cylinder and the jacking cylinder according to a preset extension and retraction range and pressure value, and automatically adjust the pressure value to avoid damage to the template.

[0012] Preferably, the PLC control program includes a one-key operation function for automatically executing formwork closing and formwork supporting.

[0013] Preferably, the pressure valve monitors the pressure change of the hydraulic system through a pressure sensor, and automatically adjusts the pressure range when the pressure exceeds a preset value.

[0014] On the other hand, the present invention also discloses an intelligent income and expenditure model method based on the above intelligent income and expenditure model system, comprising the following steps:

[0015] S1, install the hydraulic station on the secondary lining trolley and connect it with the hydraulic control program to ensure that the secondary lining trolley can move according to construction needs;

[0016] S2, position the secondary lining trolley to the predetermined position to ensure that the construction area meets the formwork conditions;

[0017] S3, start the hydraulic station, control the jacking cylinder to rise synchronously to the predetermined position, and complete the support of the top mold;

[0018] S4, controlling the folding cylinder of the left mold to synchronously extend to a predetermined position to complete the support of the left mold;

[0019] S5, controlling the right mold folding cylinder to synchronously extend to a predetermined position to complete the support of the right mold;

[0020] S6, start the pressure-maintaining valve to maintain the stability of the formwork and perform the second lining pouring operation;

[0021] S7, after the second lining is poured and the demoulding conditions are met, the pressure-maintaining valve is closed;

[0022] S8, synchronously controlling the left mold folding cylinder to retract to the initial position;

[0023] S9, synchronously controlling the right mold folding cylinder to retract to the initial position;

[0024] S10, controlling the lifting cylinder to synchronously descend to the initial position to complete the demoulding action.

[0025] Preferably, the hydraulic control program pre-sets the order and pressure values ​​of the actions of the left mold folding cylinder, the right mold folding cylinder and the jacking cylinder.

[0026] The beneficial effects of the present invention are as follows:

[0027] (1) The present invention realizes the automatic operation of the hydraulic system through the PLC control program, supports one-button mold closing and supporting functions, gets rid of the cumbersome operation process of the traditional manual adjustment of the reversing valve, and significantly reduces the difficulty of operation and dependence on manual experience. The hydraulic power device realizes the synchronous action of multiple groups of cylinders through the synchronization valve, ensures the precise extension and lifting of the template, improves the operation efficiency, and shortens the construction period.

[0028] (2) The present invention significantly reduces the reliance of the secondary lining trolley on heavy mechanical supports by adding a pressure-maintaining valve to replace mechanical supports, thereby reducing the weight of the trolley. This not only reduces the difficulty of transporting and installing the equipment, but also reduces the bending and deformation problems of mechanical supports caused by long-term use, reduces maintenance and replacement costs, and achieves cost reduction and efficiency improvement. The design of the pressure-maintaining valve further enhances the hydraulic stability during the construction process, prevents the template from shrinking due to pressure relief, and ensures the safety of the pouring operation and the construction quality.

[0029] (3) The connection point between the support device and the template of the present invention is reasonably designed. Through the flexible combination of the upper and lower longitudinal beams, support columns and guide mechanisms, it can adapt to the construction requirements of tunnels with different cross-sectional shapes. The design of the guide mechanism ensures the accuracy of the template movement trajectory. Even in tunnel construction with complex geological conditions, it can provide reliable support and precise template adjustment, enhancing the versatility and adaptability of the system. The guide mechanism of the present invention works in conjunction with the jacking cylinder to ensure smooth movement of the template during the jacking and retraction process, avoiding deviation or tilt.

[0030] (4) The present invention uses a pressure valve combined with a pressure sensor to monitor the pressure changes of the hydraulic system in real time, automatically adjusts the pressure range according to actual needs, and effectively avoids the problem of template damage caused by excessive pressure. At the same time, the preset PLC program can flexibly set the sequence and pressure value of the cylinder action to ensure that the system can operate stably under different working conditions, thereby improving the accuracy of operation and the consistency of construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the structure of the secondary lining trolley inlet and outlet mold of the prior art;

[0032] Figure 2 is a schematic diagram of the structure of the intelligent income and expenditure model system according to an embodiment of the present invention;

[0033] Figure 3 is a structural schematic diagram of a hydraulic power device according to an embodiment of the present invention;

[0034] Figure 4 is a three-dimensional schematic diagram of a supporting device according to an embodiment of the present invention;

[0035] Figure 5 is a three-dimensional front view of a lower longitudinal beam of an embodiment of the present invention;

[0036] Figure 6 It is a flow chart of the intelligent income and expenditure model method according to an embodiment of the present invention.

[0037] Figure numerals: 1-left mold folding cylinder; 2-right mold folding cylinder; 3-column connecting piece; 4-side mold connecting piece; 5-lifting cylinder; 6-support device; 61-lower longitudinal beam; 62-middle longitudinal beam; 63-support column; 64-upper longitudinal beam; 65-lifting and transverse movement mechanism; 66-guide mechanism; 67-guide square mouth; 68-transverse movement device; 7-lifting cylinder connecting piece; 8-synchronizing valve; 9-pressure maintaining valve; 10-pressure valve; 11-oil pipe; 12-hydraulic station. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention belong to the present invention.

[0039] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present application. However, those skilled in the art will appreciate that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps, etc. can be adopted. In other cases, known methods, devices, realizations or operations are not shown or described in detail to avoid blurring the various aspects of the application.

[0040] See also Figure 2-5 , this embodiment provides an intelligent mold retracting and extending system for a secondary lining trolley, including a left mold folding cylinder 1, a right mold folding cylinder 2, a lifting cylinder 5, a supporting device 6 and a hydraulic power device. The left mold folding cylinder 1 is connected to the column connector 3 and the side mold connector 4 on the left side, and is used to control the contraction and expansion of the left mold. Among them, the left mold folding cylinder 1 is hydraulically controlled by the hydraulic power device, and its connection method with the column connector 3 ensures that the movement trajectory of the left mold is stable to avoid deviation during operation. At the same time, the side mold connector 4 is tightly combined with the side mold to provide reliable lateral support during construction. The right mold folding cylinder 2 is connected to the column connector 3 and the side mold connector 4 on the right side, and is used to control the contraction and expansion of the right mold. The structural design of the right mold folding cylinder 2 is similar to that of the left mold folding cylinder 1. It is driven by a hydraulic power device and used in conjunction with the right connector 3 and the side mold connector 4 to ensure that the right mold and the left mold move synchronously to avoid deformation of the template due to uneven force.

[0041] The support device 6 includes a lower longitudinal beam 61, a middle longitudinal beam 62, a support column 63 and an upper longitudinal beam 64. The lifting cylinder 5 is installed on the lower longitudinal beam 61 and connected to the middle longitudinal beam 62 through the lifting cylinder connector 7. In this structure, the lower longitudinal beam 61 provides an overall stable support foundation, the column connector 3 is arranged on the lower longitudinal beam 61, and the design of the middle longitudinal beam 62 ensures the vertical strength and stability of the support device 6. The connector 7 of the lifting cylinder 5 allows the lifting and lowering action of the middle longitudinal beam 62 to be smoother and more precise. The support columns 63 are symmetrically arranged on both sides of the middle longitudinal beam 62 to further enhance the overall strength of the structure. The upper longitudinal beam 64 is arranged at the top of the support columns 63 on both sides and is fixed to the top mold. The precise adjustment of the top mold is achieved through the stable support of the support columns 63 and the lifting and lowering action of the lifting cylinder 5.

[0042] The hydraulic power unit 12 includes a synchronization valve 8, a pressure maintaining valve 9, a pressure valve 10, an oil pipe 11 and a hydraulic station 12, which are used to control the synchronous action of the left mold folding cylinder 1, the right mold folding cylinder 2 and the lifting cylinder 5. The hydraulic power unit 12 serves as the core power source of the entire system, providing stable and reliable power support for all hydraulic components, ensuring the continuous and efficient operation of the system during the construction process.

[0043] Furthermore, the synchronization valve 8 is connected to the hydraulic station 12 to control the synchronous action of the left mold folding cylinder 1, the right mold folding cylinder 2 and the lifting cylinder 5. The design of the synchronization valve 8 can ensure that multiple groups of cylinders move in unison during the mold closing and supporting process, which is crucial to ensure the overall stability and construction accuracy of the template. For example, when the left mold folding cylinder 1 and the right mold folding cylinder 2 are unfolded, the synchronization valve 8 can coordinate the speed and force of multiple cylinders to avoid the position deviation or deformation of the template due to asynchrony. The pressure-maintaining valve 9 is connected to the hydraulic station 12 to prevent the template from shrinking after the hydraulic system is depressurized. In actual construction, the hydraulic system may cause the cylinder to fail to maintain the predetermined position due to long-term operation or accidental depressurization. The pressure-maintaining valve 9 can effectively avoid the shrinkage of the template by maintaining a stable pressure in the hydraulic system, ensuring that the template always remains in the correct working position during construction, thereby improving the safety and quality of construction. The pressure valve 10 is connected to the hydraulic station 12 to control the telescopic stroke of the cylinder according to a preset pressure range. The pressure valve 10 can accurately adjust the size of the hydraulic pressure according to the construction requirements. For example, when controlling the lifting and lowering of the jacking cylinder 5, by adjusting the pressure range, it can be ensured that the jacking action is smooth and does not exceed the bearing capacity of the template structure, thereby avoiding damage to the template due to excessive pressure or poor support due to insufficient pressure. The oil pipe 11 is respectively connected to the left mold folding cylinder 1, the right mold folding cylinder 2 and the jacking cylinder 5, and is used to transmit the power provided by the hydraulic station 12 to each cylinder. The layout and connection method of the oil pipe 11 are optimized to ensure that the hydraulic oil can reach each cylinder quickly and evenly to achieve efficient operation of the system. Through the transmission of the oil pipe 11, each cylinder can act synchronously under the coordination of the synchronization valve 8, thereby achieving stable, efficient and precise control of the entire system.

[0044] In this embodiment, a lifting and lateral movement mechanism 65 is provided at both ends of the lower longitudinal beam 61 of the support device 6, and the lifting cylinder 5 is provided between the lifting and lateral movement mechanism 65 and the middle longitudinal beam 62. The lifting and lateral movement mechanism 65 is provided at both ends of the lower longitudinal beam 61 and is fixed to the flange plate of the lower longitudinal beam 61 by welding or bolts. The setting of the lifting and lateral movement mechanism 65 enables the lifting cylinder 5 to flexibly adjust its position, thereby meeting the requirements of different construction scenes for the lifting position of the top formwork, which not only increases the adjustment range of the lifting cylinder 5, but also makes the support device 6 more adaptable under complex geological conditions. For example, when the cross-sectional shape of the tunnel changes, the lifting and lateral movement mechanism 65 can adjust the position of the lifting cylinder 5 by lateral movement, thereby ensuring the precise alignment of the formwork.

[0045] Furthermore, four guide mechanisms 66 are arranged between the middle longitudinal beam 62 and the lower longitudinal beam 61 of the support device 6, and four guide square openings 67 are provided on the lower longitudinal beam 61, and the front end of the guide mechanism 66 passes through the guide square openings 67. Under the action of the jacking cylinder 5, the relative positions of the middle longitudinal beam 62 and the lower longitudinal beam 61 can be precisely adjusted. The guide mechanism 66 ensures that the lifting and lowering motion trajectory of the middle longitudinal beam 62 always remains vertical, which is crucial for the stability and construction accuracy of the template. The setting of the guide square openings 67 provides a fixed guide path for the guide mechanism 66, avoiding the deviation or jamming of the middle longitudinal beam 62 during the lifting process, thereby improving the overall reliability and durability of the support device 6. This structural design optimizes the flexibility of template adjustment while maintaining the strength of the support system, ensuring the high efficiency and high quality of tunnel construction.

[0046] In addition, a transverse moving device 68 is fixed at the bottom of the lifting and transverse moving mechanism 65, and the transverse moving device 68 can be moved horizontally to the left and right to fine-tune the entire secondary lining trolley. The design of the transverse moving device 68 enables the secondary lining trolley to flexibly adjust its position during the actual construction process, especially when the tunnel construction environment is complex and the trolley positioning accuracy is required to be high. Through the left and right movement function of the transverse moving device 68, the overall position of the secondary lining trolley can be fine-tuned to ensure the accurate alignment of the template and the tunnel section. This fine-tuning function not only improves the construction adaptability of the secondary lining trolley, but also effectively reduces the construction quality problems caused by the initial positioning error of the secondary lining trolley, while improving the construction efficiency and accuracy.

[0047] In this embodiment, the hydraulic station 12 realizes automated operation through a PLC control program, and the PLC control program is used to realize the synchronous extension and retraction of the left mold folding cylinder 1, the right mold folding cylinder 2 and the lifting cylinder 5 according to the preset extension and retraction range and pressure value, and automatically adjust the pressure value to avoid damage to the template. The design of the PLC control program can pre-set the extension and retraction range and pressure value according to the construction requirements to ensure the accuracy and coordination of the action of each cylinder. For example, when performing the template support operation, the PLC control program can synchronously control the expansion speed of the left mold folding cylinder 1 and the right mold folding cylinder 2 to ensure that the template is evenly stressed on both sides, thereby avoiding tilting or damage to the template due to asynchrony.

[0048] The PLC control program includes a one-button operation function for automatically executing the formwork closing and formwork supporting. The one-button operation function allows the operator to complete the entire formwork supporting or closing process by simply pressing a one-button operation button without having to manually adjust the action parameters of each cylinder. This design greatly simplifies the operation process, reduces the reliance on the operator's experience, and significantly improves the construction efficiency and the accuracy of the formwork operation. The pressure valve 10 monitors the pressure changes of the hydraulic system through a pressure sensor, and automatically adjusts the pressure range when the pressure exceeds the preset value. The pressure sensor monitors the pressure condition inside the hydraulic system in real time and transmits the data to the pressure valve 10 to ensure timely adjustment when the pressure is too high to protect the safety of the system and the formwork structure. For example, during the formwork supporting process, if the pressure provided by the hydraulic station 12 exceeds the bearing capacity of the formwork and the cylinder, the pressure valve 10 will automatically reduce the pressure to a safe range according to the data fed back by the sensor, thereby effectively avoiding equipment damage or construction accidents caused by overload. This pressure control function further improves the stability and safety of the system and ensures the smooth progress of the construction process.

[0049] See also Figure 6 Another embodiment of the present invention describes an intelligent revenue and expenditure model method based on the above-mentioned intelligent revenue and expenditure model system, comprising the following steps:

[0050] S1, install the hydraulic station 12 on the secondary lining trolley and connect it with the hydraulic control program to ensure that the secondary lining trolley can move according to construction needs. The hydraulic station 12 is the power core of the entire system. Its installation needs to ensure that the hydraulic pipeline is connected correctly and form a stable data and power transmission channel with the PLC control program, so that the position of the secondary lining trolley can be flexibly adjusted according to needs in the construction scene.

[0051] S2, the secondary lining trolley is positioned to a predetermined position to ensure that the construction area meets the formwork conditions. The secondary lining trolley is fine-tuned and positioned by the transverse movement device 68 to adapt to the specific shape and size of the tunnel section. The accuracy of positioning directly affects the support and pouring effect of the subsequent formwork, so it needs to be accurately adjusted in combination with the on-site conditions.

[0052] S3, start the hydraulic station 12, control the jacking cylinder 5 to rise synchronously to the predetermined position, and complete the support of the top mold. The jacking cylinder 5 rises evenly under the coordination of the synchronization valve 8, and provides stable support for the top mold through the support device 6. In this process, the guide mechanism 66 ensures that the movement trajectory of the jacking cylinder 5 is vertical, thereby preventing the top mold from tilting or offsetting.

[0053] S4, control the left mold folding cylinder 1 to synchronously extend to a predetermined position to complete the support of the left mold. Under the control of the PLC control program, the left mold folding cylinder 1 is unfolded with a preset pressure value and telescopic range, and cooperates with the column connector 3 and the side mold connector 4 to ensure that the side mold fits the inner wall of the tunnel accurately and provides a firm support effect.

[0054] S5, control the right mold folding cylinder 2 to synchronously extend to a predetermined position to complete the support of the right mold. The extension of the right mold folding cylinder 2 is performed synchronously with the left mold folding cylinder 1 to ensure the overall balance and symmetry of the template and prevent the template from being deformed or structurally unstable due to uneven force on both sides.

[0055] S6, start the pressure-maintaining valve 9 to maintain the stability of the formwork and perform the second lining pouring operation. The pressure-maintaining valve 9 is activated after the formwork support is completed to ensure that the hydraulic system maintains a stable pressure during the long construction period, prevent the formwork from shrinking, and ensure the quality of concrete pouring.

[0056] S7, after the second lining is poured and the demoulding conditions are met, the pressure-maintaining valve 9 is closed. At this time, the hydraulic system enters the demoulding preparation stage, and closing the pressure-maintaining valve 9 can prepare for the subsequent cylinder action to release the pressure.

[0057] S8, synchronously control the left mold folding cylinder 1 to retract to the initial position. Under the action of the synchronization valve 8, the left mold folding cylinder 1 retracts to the initial position at a steady speed, leaving space for the right mold to retract, while ensuring the safety of the template during the demolding process.

[0058] S9, synchronously control the right mold folding cylinder 2 to retract to the initial position. The retraction action of the right mold folding cylinder 2 is consistent with the retraction of the left mold. Under the precise control of the PLC control program, the retraction of the molds on both sides is guaranteed to be smooth and orderly, and will not affect the overall balance of the second lining trolley.

[0059] S10, control the lifting cylinder 5 to synchronously descend to the initial position to complete the demolding operation. After completing the support of the top template, the lifting cylinder 5 descends smoothly. Through the cooperation of the lifting and lateral movement mechanism 65 and the guide mechanism 66, it is ensured that the template is not offset or stuck during the landing process, thereby successfully completing the entire demolding operation. In this process, the synchronous control function of the system further improves the safety and efficiency of the operation, and provides convenient preparation for the next stage of construction.

[0060] Furthermore, the hydraulic control program pre-sets the sequence and pressure value of the actions of the left mold folding cylinder 1, the right mold folding cylinder 2 and the jacking cylinder 5. By inputting the construction requirements in advance into the hydraulic control program, it can be ensured that the actions of each cylinder are carried out according to the preset logical sequence and pressure parameters. For example, when the formwork is supported, the hydraulic control program first drives the jacking cylinder 5 to rise to a predetermined height to stably support the top form, and then controls the left mold folding cylinder 1 and the right mold folding cylinder 2 to extend to the working position synchronously in turn to ensure that the side form fits tightly with the inner wall of the tunnel. The action sequence of each group of cylinders has been optimized to avoid structural deformation or operational errors caused by uneven force on various parts of the formwork. In addition, the pressure value set by the hydraulic control program can ensure that the cylinder will not exceed the bearing capacity of the formwork when in action, thereby effectively protecting the formwork structure and extending its service life, while ensuring that the movement of the formwork is smooth and precise, further improving the construction quality and efficiency.

[0061] Compared with the prior art, the embodiment of the present invention first transforms the hydraulic station 12, and adds a synchronization valve 8 according to the number of cylinders, so that each group of cylinders can be synchronously extended and retracted when the mold is retracted and retracted. This design solves the problem that the traditional trolley hydraulic station does not have a synchronization device, resulting in asynchronous cylinder movements, ensuring that each group of cylinders moves in unison when the template is expanded or retracted, and avoiding the phenomenon of template offset or uneven force caused by asynchronous. In addition, the traditional trolley hydraulic station does not have a pressure-maintaining device, and needs to rely on mechanical supports to withstand the pressure after pressure relief. The present invention adds a pressure-maintaining valve 9 to the hydraulic station 12 to replace the traditional mechanical supports. By eliminating the mechanical supports, not only the number of trolley components is reduced, but also the hole spacing on both sides of the trolley is increased, thereby improving the adaptability and construction efficiency of the trolley. The hydraulic station 12 and all hydraulic-related components are all installed on the second lining trolley and can travel with the second lining trolley. The hydraulic control program has been written at the time of delivery. The pressure valve 10 is used to control the stroke of the cylinder, and the input pressure value is automatically adjusted to adjust the extension range of the cylinder by controlling the pressure. At the same time, this design can prevent the steel mesh from being damaged by excessive pressure. For example, during the formwork support process, the pressure valve 10 can automatically adjust the pressure range according to the real-time pressure data of the hydraulic system to ensure the safety of the formwork and protect the integrity of the construction structure.

[0062] In the embodiment of the present invention, the operation mode adopts PLC control program, and the program is written according to the order of cylinder extension, and the pressure value is fine-tuned. Through the above technology, the operation of the inlet and outlet mold of the secondary lining trolley has changed from relying on experienced operators in the past to intelligent operation with one-key precise extension. The PLC control program not only improves the intelligence and simplification of the operation, but also supports flexible adjustment of the order and pressure parameters of the cylinder action to meet different construction needs.

[0063] Specifically, in this embodiment, the operation process of the new type of secondary lining retractable and retractable mold structure is as follows: After the secondary lining trolley is positioned, the hydraulic station 12 is started, and the four cylinders of the jacking cylinder 5 are first controlled to rise synchronously to the predetermined position and then stop. Subsequently, the eight cylinders of the left mold folding cylinder 1 are synchronously extended to the predetermined position and then stop, and then the eight cylinders of the right mold folding cylinder 2 are controlled to be synchronously extended to the predetermined position and then stop. After the positioning of the template is completed, the pressure-maintaining valve 9 is opened to keep the template stable, and the secondary lining pouring operation can be carried out. After the secondary lining pouring is completed and the demolding conditions are met, the pressure-maintaining valve 9 is closed, and the demolding operation is carried out in reverse order: first, the eight cylinders of the left mold folding cylinder 1 are controlled to shrink synchronously to the initial position, and then the eight cylinders of the right mold folding cylinder 2 are controlled to shrink synchronously, and finally the four cylinders of the jacking cylinder 5 are controlled to descend synchronously to the initial position to complete the mold closing action. The whole process is highly intelligent, convenient and accurate to operate, providing an efficient and reliable solution for tunnel construction.

[0064] In summary, the present invention discloses an intelligent mold system and intelligent mold method for a secondary lining trolley. By optimizing the hydraulic power device and introducing the PLC control program, the synchronous control and automatic operation of the left mold folding cylinder 1, the right mold folding cylinder 2 and the jacking cylinder 5 are realized, and the mold closing and supporting tasks can be accurately performed according to the preset sequence and pressure value. The present invention adopts hydraulic components such as a pressure-maintaining valve 9, a synchronous valve 8 and a pressure valve 10 to replace the traditional mechanical support parts, significantly simplifying the structure, reducing the weight of the trolley, and reducing the intensity of manual work and construction time. The design of the guide mechanism 66 and the jacking and transverse movement mechanism 65 further improves the adjustment flexibility of the system and the accuracy of the template movement, ensuring the smooth operation of the template and the construction quality. The intelligent mold system of the present invention not only improves the operating efficiency and safety, but also enhances the adaptability of the trolley to different tunnel sections, providing an efficient, intelligent and stable solution for tunnel construction, and has broad application prospects and promotion value.

[0065] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may also be combined, the steps may be implemented in any order, and there are many other changes in different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity. Although the present invention has been described in detail with reference to the above embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the above embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An intelligent inflow and outflow mold system for a secondary lining trolley, characterized in that: The invention comprises a left mold folding cylinder (1), a right mold folding cylinder (2), a lifting cylinder (5), a supporting device (6) and a hydraulic power device. The left mold folding cylinder (1) is connected to a left column connecting member (3) and a side mold connecting member (4) and is used to control the contraction and expansion of the left mold. The right mold folding cylinder (2) is connected to a right column connecting member (3) and a side mold connecting member (4) and is used to control the contraction and expansion of the right mold. The supporting device (6) comprises a lower longitudinal beam (61), a middle longitudinal beam (62), a supporting column (63) and an upper longitudinal beam (64). The supporting device (6) is not provided with a cross beam arranged along the width direction of the second lining trolley. The lifting cylinder (5) is installed on the lower longitudinal beam (61) and is connected to the middle longitudinal beam (62) via a lifting cylinder connecting member (7). Support columns (63) are symmetrically arranged on both sides of the middle longitudinal beam (62). The upper longitudinal beam (64) is arranged at the top of the supporting columns (63) on both sides, the upper longitudinal beam (64) is fixed to the top mold, and the lifting cylinder (5) controls the lifting of the top mold through the supporting device (6); the hydraulic power device comprises a synchronous valve (8), a pressure-maintaining valve (9), a pressure valve (10), an oil pipe (11) and a hydraulic station (12), which are used to control the synchronous action of the left mold folding cylinder (1), the right mold folding cylinder (2) and the lifting cylinder (5); four guide mechanisms (66) are arranged between the middle longitudinal beam (62) and the lower longitudinal beam (61) of the supporting device (6), four guide square openings (67) are provided on the lower longitudinal beam (61), and the front end of the guide mechanism (66) passes through the guide square opening (67), and under the action of the lifting cylinder (5), the relative position of the middle longitudinal beam (62) and the lower longitudinal beam (61) can be adjusted.

2. The intelligent inflow and outflow mold system for the secondary lining trolley according to claim 1 is characterized in that: The synchronization valve (8) is connected to the hydraulic station (12) and is used to control the synchronous action of the left mold folding cylinder (1), the right mold folding cylinder (2) and the lifting cylinder (5); the pressure-maintaining valve (9) is connected to the hydraulic station (12) and is used to prevent the mold plate from shrinking after the hydraulic system is depressurized; the pressure valve (10) is connected to the hydraulic station (12) and is used to control the extension and retraction stroke of the cylinder according to a preset pressure range; the oil pipe (11) is respectively connected to the left mold folding cylinder (1), the right mold folding cylinder (2) and the lifting cylinder (5).

3. The intelligent inflow and outflow mold system for the secondary lining trolley according to claim 2 is characterized in that: Lifting and transverse movement mechanisms (65) are provided at both ends of the lower longitudinal beam (61) of the support device (6), and the lifting cylinder (5) is provided between the lifting and transverse movement mechanism (65) and the middle longitudinal beam (62).

4. The intelligent inflow and outflow mold system for the secondary lining trolley according to claim 3 is characterized in that: A transverse movement device (68) is fixed at the bottom of the lifting and transverse movement mechanism (65).

5. The intelligent inflow and outflow mold system for the secondary lining trolley according to any one of claims 1 to 4, characterized in that: The hydraulic station (12) realizes automated operation through a PLC control program, and the PLC control program is used to realize synchronous extension and retraction of the left mold folding cylinder (1), the right mold folding cylinder (2) and the lifting cylinder (5) according to a preset extension and retraction range and pressure value, and automatically adjust the pressure value to avoid damage to the mold plate.

6. The intelligent inflow and outflow mold system for the secondary lining trolley according to claim 5 is characterized in that: The PLC control program includes a one-key operation function for automatically executing formwork closing and formwork supporting.

7. The intelligent inflow and outflow mold system for the secondary lining trolley according to claim 6 is characterized in that: The pressure valve (10) monitors the pressure change of the hydraulic system through a pressure sensor, and automatically adjusts the pressure range when the pressure exceeds a preset value.

8. An intelligent revenue and expenditure model method based on the intelligent revenue and expenditure model system according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1, installing the hydraulic station (12) on the secondary lining trolley and connecting it to the hydraulic control program to ensure that the secondary lining trolley can be moved according to construction requirements; S2, position the secondary lining trolley to the predetermined position to ensure that the construction area meets the formwork conditions; S3, starting the hydraulic station (12) to control the lifting cylinder (5) to rise synchronously to a predetermined position, thereby completing the support of the top mold; S4, controlling the left mold folding cylinder (1) to synchronously extend to a predetermined position to complete the support of the left mold; S5, controlling the right mold folding cylinder (2) to synchronously extend to a predetermined position, thereby completing the support of the right mold; S6, start the pressure-maintaining valve (9) to maintain the stability of the formwork and perform the secondary lining pouring operation; S7, after the secondary lining is poured and the demoulding conditions are met, the pressure retaining valve (9) is closed; S8, synchronously controlling the left mold folding cylinder (1) to retract to the initial position; S9, synchronously controlling the right mold folding cylinder (2) to retract to the initial position; S10, controlling the lifting cylinder (5) to synchronously descend to the initial position, completing the demoulding action.

9. The intelligent income and expenditure model method according to claim 8, characterized in that: The hydraulic control program pre-sets the action sequence and pressure values ​​of the left mold folding cylinder (1), the right mold folding cylinder (2) and the lifting cylinder (5).

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