An on-site maintenance device for ancient building color drawing layer

Abstract

The application relates to an ancient building color drawing layer on-site maintenance device and belongs to the technical field of ancient building repair and protection. The device comprises a pressurizing positioning mechanism which is used for detachably fixing the ancient building color drawing layer on-site maintenance device on an ancient building structure; a perfusion mechanism which is arranged on the pressurizing positioning mechanism and comprises a driving assembly, a loading assembly and an injection needle, the loading assembly is provided with a containing cavity for accommodating a material cylinder, the driving assembly is arranged at one end of the containing cavity, and the injection needle is arranged at the other end of the containing cavity; and a control mechanism which is arranged on the perfusion mechanism, electrically connected to the driving assembly and the pressurizing positioning mechanism, and used for controlling the start-stop and running speed of the driving assembly and the holding force of the pressurizing positioning mechanism on the ancient building structure. The device realizes reliable fixing through the pressurizing positioning mechanism, realizes automatic quantitative injection through the perfusion mechanism, realizes grouting and pressurizing cooperative control through the control mechanism, and overcomes the problems of relying on manual experience and unstable operation.

Description

Technical Field

[0001] This invention belongs to the field of ancient building restoration and protection technology, specifically relating to an on-site maintenance device for the painted layer of ancient buildings. Background Technology

[0002] Ancient architectural painting, as the essence of traditional Chinese architectural art, carries rich historical information and profound cultural connotations. The painted layer is typically composed of a multi-layered structure consisting of a pigment layer, a base layer, and a ground layer. The pigment layer is only 20-25 μm thick, while the ground layer can be 10-20 mm thick. With the passage of time and environmental changes, due to aging, humidity fluctuations, and the expansion and contraction of wooden components, hollow areas easily form between the painted layer and the ground layer—cavities created by the separation of the painted layer from the ground layer. If not addressed promptly, these hollow areas will expand, leading to flaking, cracking, or even complete detachment of the painted layer, resulting in irreversible damage to the cultural relic.

[0003] Currently, on-site maintenance of hollow areas in the painted layers of ancient buildings mainly relies on traditional manual methods. The typical process of traditional manual methods is as follows: First, the restorer uses a hollow hammer to tap and locate the boundary of the hollow area. Then, in a non-critical area of ​​the painting, a drill bit with a diameter of about 8mm is used to drill a hole at an angle to the hollow area. Next, a handheld syringe is used to inject reinforcement material into the hollow cavity. Finally, bamboo strips and bandages are used to apply pressure and fix the repaired area. After the reinforcement material has cured, the holes are sealed and the painting is applied in accordance with the color.

[0004] However, in traditional manual methods, both grouting and pressure fixing operations rely heavily on the personal experience and operational feel of the repair personnel, resulting in varying work effects from person to person and a lack of stability and consistency. Summary of the Invention

[0005] To address the problem that existing traditional manual methods, whether grouting or pressure fixing, heavily rely on the personal experience and dexterity of the restorers, resulting in inconsistent and unreliable results, this solution provides an on-site maintenance device for the painted layers of ancient buildings.

[0006] The objective of this invention can be achieved through the following technical solutions: This invention provides an on-site maintenance device for the painted layer of ancient buildings, used to repair hollow areas between the painted layer and the ground layer of an ancient building structure. It includes: a pressure positioning mechanism for detachably fixing the on-site maintenance device to the ancient building structure; an injection mechanism disposed on the pressure positioning mechanism, including a drive component, a loading component, and an injection needle, wherein the loading component has a receiving cavity for holding a material cylinder, the drive component is disposed at one end of the receiving cavity, and the injection needle is disposed at the other end of the receiving cavity; and a control mechanism disposed on the injection mechanism, electrically connected to the drive component and the pressure positioning mechanism, for controlling the start / stop and operating speed of the drive component, and controlling the clamping force of the pressure positioning mechanism on the ancient building structure.

[0007] As a preferred embodiment of the present invention, the pressure positioning mechanism includes a base and a plurality of negative pressure suction cups; a through hole is provided in the center of the base, the infusion mechanism is provided on one side of the base, and the injection needle passes through the through hole; the plurality of negative pressure suction cups are provided on the other side of the base, and the plurality of negative pressure suction cups are arranged around the through hole.

[0008] As a preferred embodiment of the present invention, the pressure positioning mechanism further includes a drive motor, a wheel, a clamping belt, a hanging ring, and a hook; the drive motor is fixedly disposed on one side of the base, the wheel is drivenly connected to the output shaft of the drive motor, one end of the clamping belt is fixedly connected to the wheel and wrapped around the outer circumference of the wheel; the hook is fixedly disposed on the other side of the base; the hanging ring is fixedly connected to the other end of the clamping belt, and the hanging ring is used to hook the clamping belt into the hook after the clamping belt passes around the ancient building structure.

[0009] As a preferred embodiment of the present invention, the material cylinder includes a cylinder body and a cylinder plate, the cylinder plate being movably disposed inside the cylinder body, and the reinforcing material for filling the hollow area being accommodated within the enclosed space of the cylinder body and the cylinder plate, and the front end of the cylinder body being provided with a discharge port; The loading assembly includes a housing connected to the pressurizing and positioning mechanism, and the receiving cavity is formed in the housing; the driving assembly includes an electric push rod and a push plate, the electric push rod is fixed to the rear end of the housing, and the push rod of the electric push rod passes through the housing to the receiving cavity, the push plate is disposed in the receiving cavity and connected to the push rod; the injection needle is fixed to the front end of the housing and communicates with the receiving cavity; When the control mechanism supplies power to the electric push rod, the push rod pushes the push plate and the cylinder plate to move forward in the cylinder, squeezing the reinforcing material in the cylinder into the injection needle through the discharge port, and then injecting it into the hollow area by the injection needle; when the control mechanism cuts off power to the electric push rod, the push rod of the electric push rod retracts.

[0010] As a preferred embodiment of the present invention, a sealing membrane is provided at the discharge port; the loading assembly further includes a buffer spring, which is disposed inside the front end of the receiving cavity; one end of the injection needle is located inside the receiving cavity, and the other end is located outside the receiving cavity; When the material cylinder is loaded into the receiving cavity, the front end of the material cylinder abuts against the buffer spring, the sealing membrane abuts against one end of the injection needle, and is punctured by one end of the injection needle under the continuous advancement of the material cylinder; after the injection needle punctures the sealing membrane, one end of the injection needle is inserted into the discharge port, and the reinforcing material is in communication with the injection needle.

[0011] As a preferred embodiment of the present invention, the control mechanism includes a circuit board, and a rechargeable battery, a pressure sensor, and a torque sensor electrically connected to the circuit board; the torque sensor is disposed between the output shaft of the drive motor and the wheel, and is used to detect the output torque of the drive motor; the pressure sensor is disposed on the inner side of the clamping strap, and is used to detect the contact pressure between the clamping strap and the ancient building structure; the drive motor and the electric push rod are both electrically connected to the circuit board; Specifically, when the torque sensor detects that the output torque of the drive motor reaches a first preset threshold, it is determined that the clamping strap has been initially tightened and the on-site maintenance device for the ancient building's painted layer is in a positioning state; when the pressure sensor detects that the contact pressure between the clamping strap and the ancient building structure reaches a second preset threshold, it is determined that the on-site maintenance device for the ancient building's painted layer is in a pressurized clamping state, and the drive motor is controlled to stop, so that the clamping strap maintains its current tension; the first preset threshold is less than the second preset threshold.

[0012] As a preferred embodiment of the present invention, the control mechanism further includes an injection pressure sensor and an alarm electrically connected to the circuit board. The injection pressure sensor is disposed in the flow channel of the injection needle and is used to detect the pressure of the reinforcing material during the injection process. Specifically, when the injection pressure reaches the first pressure threshold, it is determined that the hollow area has been filled with reinforcing material, and the electric push rod is controlled to stop; when the injection pressure fails to reach the first pressure threshold within a predetermined time, it is determined that there is an abnormality in the hollow area, and the alarm is controlled to issue an alarm signal.

[0013] As a preferred embodiment of the present invention, the control mechanism further includes a start button and a release button electrically connected to the circuit board; When the start button is pressed, the control mechanism controls the drive motor to rotate forward, and the wheel rewinds the clamping belt until the torque sensor detects that the output torque of the drive motor reaches the first preset threshold. Then the drive motor stops, and the on-site maintenance device for the painted layer of the ancient building is in a positioning state. When the release button is pressed, the control mechanism controls the drive motor to reverse, and the wheel releases the clamping belt.

[0014] As a preferred embodiment of the present invention, a response switch is provided between the circuit board and the electric push rod; When the torque sensor detects that the output torque of the drive motor reaches the first preset threshold, the response switch is turned on, and a circuit is formed between the circuit board and the electric push rod; when the torque sensor detects that the output torque of the drive motor is lower than the first preset threshold, the response switch is turned off, and an open circuit is formed between the circuit board and the electric push rod.

[0015] The beneficial effects of this invention are as follows: This invention provides an on-site maintenance device for the painted layer of ancient buildings. It achieves reliable fixation through a pressure positioning mechanism, automatic quantitative injection through a grouting mechanism, and coordinated control of grouting and pressure through a control mechanism, thus overcoming the problems of relying on manual experience and unstable operation. Attached Figure Description

[0016] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the structure of an on-site maintenance device for the painted layer of ancient buildings according to the present invention; Figure 2 This is a schematic diagram of the internal structure of an on-site maintenance device for the painted layer of ancient buildings according to the present invention; Figure 3 This is a schematic diagram of the material cylinder in an on-site maintenance device for painted layers of ancient buildings according to the present invention.

[0018] Explanation of main symbols In the diagram: 10. Pressure positioning mechanism; 11. Base; 12. Negative pressure suction cup; 13. Holding strap; 14. Hanging ring; 15. Hook; 16. Drive motor; 17. Wheel; 20. Injection mechanism; 21. Injection needle; 22. Housing; 23. Electric push rod; 24. Push plate; 25. Buffer spring; 30. Control mechanism; 31. Circuit board; 40. Material cylinder; 41. Cylinder body; 42. Cylinder plate; 43. Sealing membrane. Detailed Implementation

[0019] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided.

[0020] Ancient architectural painting, as the essence of traditional Chinese architectural art, carries rich historical information and profound cultural connotations. The painted layer is typically composed of a multi-layered structure consisting of a pigment layer, a base layer, and a ground layer. The pigment layer is only 20-25 μm thick, while the ground layer can be 10-20 mm thick. With the passage of time and environmental changes, due to aging, humidity fluctuations, and the expansion and contraction of wooden components, hollow areas easily form between the painted layer and the ground layer—cavities created by the separation of the painted layer from the ground layer. If not addressed promptly, these hollow areas will expand, leading to flaking, cracking, or even complete detachment of the painted layer, resulting in irreversible damage to the cultural relic.

[0021] Currently, on-site maintenance of hollow areas in the painted layers of ancient buildings mainly relies on traditional manual methods. The typical process of traditional manual methods is as follows: First, the restorer uses a hollow hammer to tap and locate the boundary of the hollow area. Then, in a non-critical area of ​​the painting, a drill bit with a diameter of about 8mm is used to drill a hole at an angle to the hollow area. Next, a handheld syringe is used to inject reinforcement material into the hollow cavity. Finally, bamboo strips and bandages are used to apply pressure and fix the repaired area. After the reinforcement material has cured, the holes are sealed and the painting is applied in accordance with the color.

[0022] However, traditional manual methods, including both grouting and pressure fixing, heavily rely on the personal experience and dexterity of the restorers, resulting in inconsistent and unreliable outcomes. Specifically, in the grouting stage, the speed, angle, and dosage of the syringe are entirely controlled by the restorer's feel, leading to significant variations in grout volume and rework rates, even among the same restorer at different times. Similarly, in the pressure fixing stage, the tightness of the bamboo strips and bandages, and the uniformity of pressure distribution, depend on the restorer's experience. Excessive pressure may damage the painted layer, while insufficient pressure fails to effectively press back in areas of hollowness. Therefore, overcoming the reliance on manual experience and inconsistent results in existing grouting and fixing techniques, and achieving standardized grouting and pressure fixing operations, is a crucial technical challenge that urgently needs to be addressed by those skilled in the art.

[0023] Please see Figures 1-3This embodiment provides an on-site maintenance device for the painted layer of ancient buildings, used to repair the hollow area between the painted layer and the ground layer of an ancient building structure. It includes: a pressure positioning mechanism 10 for detachably fixing the on-site maintenance device for the painted layer of ancient buildings to the ancient building structure; an injection mechanism 20 disposed on the pressure positioning mechanism 10, including a drive component, a loading component and an injection needle 21, the loading component being provided with a receiving cavity for holding a material cylinder 40, the drive component being disposed at one end of the receiving cavity, and the injection needle 21 being disposed at the other end of the receiving cavity; and a control mechanism 30 disposed on the injection mechanism 20, electrically connected to the drive component and the pressure positioning mechanism 10, for controlling the start and stop and the operating speed of the drive component, as well as controlling the clamping force of the pressure positioning mechanism 10 on the ancient building structure.

[0024] For example, the pressure positioning mechanism 10 is used to detachably fix the entire device to the surface of the ancient building structure, providing a stable support foundation for subsequent grouting operations while avoiding damage to the ancient building structure. For example, the injection mechanism 20 is used to controllably deliver the reinforcing material pre-loaded in the material cylinder 40 to the injection needle 21, which then injects it into the hollow areas between the painted layer and the ground layer, thus filling and repairing the hollow areas. For example, the control mechanism 30 is used to automatically control the start / stop and operating speed of the drive components, as well as the clamping force of the pressure positioning mechanism 10 on the ancient building structure, based on preset control logic and real-time detected signals, thereby automating the repair process.

[0025] It should be explained that the hollow area needs to be determined by the repair personnel by tapping it with a hollow hammer, and a small-diameter drill bit is used to drill at an angle into the hollow layer in the hollow area to open an injection hole so that the injection needle 21 can be inserted. The operation of hollow area determination, drilling and positioning, and opening injection holes are routine steps in traditional repair processes and are not the focus of the improvement of this invention, so they will not be described in detail here.

[0026] It is understood that when using the device provided in this embodiment, the repair personnel only need to complete two preliminary preparations: locating the hollow area and drilling. Then, they insert the device's injection needle 21 into the grouting hole, fix the device to the surface of the ancient building structure, and start the device through the control mechanism 30 to automatically complete the grouting repair. This eliminates the reliance on personal operating experience and feel, and improves the consistency and reliability of the repair quality.

[0027] As a preferred technical solution of the present invention, the pressure positioning mechanism 10 includes a base 11 and a plurality of negative pressure suction cups 12; a through hole is provided in the center of the base 11, the injection mechanism 20 is provided on one side of the base 11, and the injection needle 21 passes through the through hole; the plurality of negative pressure suction cups 12 are provided on the other side of the base 11, and the plurality of negative pressure suction cups 12 are arranged around the through hole.

[0028] For example, the base 11 is machined from aluminum alloy or carbon fiber sheet, providing sufficient structural rigidity and light weight for easy on-site transport and installation. For example, the through hole in the center of the base 11 is a round hole with a diameter slightly larger than the outer diameter of the injection needle 21, providing a passage for the injection needle 21 and ensuring that the injection needle 21 can be vertically aligned with the void area.

[0029] For example, the negative pressure suction cup 12 is made of rubber or silicone and is fixed to the back of the base 11 by threaded connection or clips. For example, multiple negative pressure suction cups 12 are evenly distributed around the through hole, for example, in a four-corner symmetrical arrangement or a ring array, and the number is four, six or eight.

[0030] Understandably, in this embodiment, the device is attached to the surface of the ancient building structure by multiple negative pressure suction cups 12 on the back of the base 11, eliminating the need for drilling holes or using clamps on the ancient building structure and avoiding secondary damage that may be caused by mechanical clamping. At the same time, the multiple negative pressure suction cups 12 are evenly arranged around the through hole, so that the suction force is evenly distributed on the base 11, ensuring the positioning accuracy and stability of the injection needle 21 during the grouting process.

[0031] As a preferred embodiment of the present invention, the pressure positioning mechanism 10 further includes a drive motor 16, a wheel 17, a clamping belt 13, a hanging ring 14, and a hook 15; the drive motor 16 is fixedly disposed on one side of the base 11, the wheel 17 is drivenly connected to the output shaft of the drive motor 16, one end of the clamping belt 13 is fixedly connected to the wheel 17 and wrapped around the outer periphery of the wheel 17; the hook 15 is fixedly disposed on the other side of the base 11; the hanging ring 14 is fixedly connected to the other end of the clamping belt 13, and the hanging ring 14 is used to hang into the hook 15 after the clamping belt 13 passes around the ancient building structure.

[0032] Understandably, in this embodiment, the drive motor 16 drives the wheel 17 to wind up the clamping strap 13, achieving mechanized tightening of the clamping strap 13. Compared with the traditional manual binding method, the tightening process is more uniform and controllable, and requires no strenuous operation from the operator. After the clamping strap 13 passes around the ancient building structure, it forms a closed loop through the hanging ring 14 and the hook 15. It is easy to assemble and disassemble, and one person can complete the fixing and releasing operation of the device. It is suitable for scenarios such as cylindrical columns and irregular beams.

[0033] As a preferred embodiment of the present invention, the material cylinder 40 includes a cylinder body 41 and a cylinder plate 42. The cylinder plate 42 is movably disposed inside the cylinder body 41. The reinforcing material for filling the hollow areas is accommodated within the enclosed space of the cylinder body 41 and the cylinder plate 42. The front end of the cylinder body 41 is provided with a discharge port. The loading assembly includes a housing 22 connected to the pressure positioning mechanism 10, and a receiving cavity is formed in the housing 22. The driving assembly includes an electric push rod 23 and a push plate 24. The electric push rod 23 is fixed to the rear end of the housing 22, and the electric push rod 23 is fixed to the rear end of the housing 22. The push rod of the 3rd part passes through the housing 22 into the receiving cavity, and the push plate 24 is set in the receiving cavity and connected to the push rod; the injection needle 21 is fixed to the front end of the housing 22 and communicates with the receiving cavity; when the control mechanism 30 supplies power to the electric push rod 23, the push rod pushes the push plate 24 and the cylinder plate 42 to move forward in the cylinder 41, squeezing the reinforcing material in the cylinder 41 into the injection needle 21 through the discharge port, and then injecting it into the hollow area by the injection needle 21; when the control mechanism 30 cuts off the power to the electric push rod 23, the push rod of the electric push rod 23 retracts.

[0034] For example, the material cylinder 40 is a disposable prefabricated tubular container. The cylinder body 41 is made of high-density polyethylene or polypropylene through injection molding, and has a cylindrical hollow tubular structure with a smooth inner wall to reduce frictional resistance. For example, the cylinder plate 42 is a circular piston plate made of rubber or elastic plastic, with an outer diameter slightly larger than the inner diameter of the cylinder body 41. It is movably and sealed inside the cylinder body 41 by interference fit, dividing the interior of the cylinder body 41 into front and rear spaces, with the front space used to accommodate the reinforcing material. For example, a discharge port is provided at the center of the front end of the cylinder body 41. The discharge port is a circular through hole with a diameter of 2mm to 5mm for discharging the reinforcing material.

[0035] For example, the housing 22 of the loading component is fixedly connected to the base 11 of the pressure positioning mechanism 10 by bolts or clips. For example, the housing 22 has a cylindrical receiving cavity inside, the inner diameter of which is slightly larger than the outer diameter of the material cylinder 40, so that the material cylinder 40 can be smoothly loaded and unloaded. For example, the rear end wall of the housing 22 has a through hole for the push rod to pass through, and the front end wall of the housing 22 has an interface for mounting the injection needle 21.

[0036] For example, the electric actuator 23 in the drive assembly is a lead screw type stepper electric actuator 23, whose housing 22 is fixed to the rear end of the loading assembly housing 22 by bolts, and the actuator rod of the electric actuator 23 extends into the receiving cavity through the rear end wall of the housing 22. For example, the push plate 24 is a circular metal sheet, which is fixed to the front end of the actuator rod by threaded connection or pin. For example, the injection needle 21 is a stainless steel hollow needle tube, whose rear end communicates with the receiving cavity, and whose front end extends out of the housing 22 for insertion into the infusion hole.

[0037] For example, when the control mechanism 30 supplies power to the electric push rod 23, the push rod extends, pushing the push plate 24 forward within the receiving cavity. The front end face of the push plate 24 abuts against the rear end face of the cylinder plate 42 of the material cylinder 40, continuing to push the cylinder plate 42 forward within the cylinder 41, squeezing the reinforcing material within the cylinder 41 out of the outlet and injecting it into the hollow area through the injection needle 21. For example, when the control mechanism 30 de-energizes the electric push rod 23, the return spring or self-locking mechanism inside the electric push rod 23 automatically retracts the push rod to its initial position, and the push plate 24 retracts accordingly. At this time, the old material cylinder 40 can be removed and replaced with a new material cylinder 40.

[0038] Understandably, this embodiment uses an electric push rod 23 to drive the push plate 24 and the cylinder plate 42 to move linearly, quantitatively extruding the reinforcing material from the material cylinder 40. This achieves mechanized driving of the grouting process, replacing the traditional manual injection method using a handheld syringe. The stroke and speed of the electric push rod 23 can be precisely adjusted by the control mechanism 30, thereby achieving precise control of the grouting volume and speed, avoiding the problem of inconsistent grouting volume caused by uneven force during manual injection. The material cylinder 40 adopts a prefabricated structure, allowing for pre-packaging of reinforcing materials with different formulations, enabling plug-and-play use on-site and improving construction efficiency and material utilization.

[0039] As a preferred embodiment of the present invention, a sealing membrane 43 is provided at the discharge port; the loading assembly also includes a buffer spring 25, which is disposed inside the front end of the receiving cavity; one end of the injection needle 21 is located inside the receiving cavity, and the other end is located outside the receiving cavity; when the material cylinder 40 is loaded into the receiving cavity, the front end of the material cylinder 40 abuts against the buffer spring 25, the sealing membrane 43 abuts against one end of the injection needle 21, and is punctured by one end of the injection needle 21 under the continuous advancement of the material cylinder 40; after the injection needle 21 punctures the sealing membrane 43, one end of the injection needle 21 is inserted into the discharge port, and the reinforcing material communicates with the injection needle 21.

[0040] For example, the sealing film 43 is an aluminum foil film or a plastic composite film, which covers the outer end face of the discharge port to form a closed barrier to prevent the reinforcing material from leaking or being contaminated during storage and transportation.

[0041] For example, the buffer spring 25 is a helical compression spring, disposed inside the front end of the receiving cavity, and sleeved on the outer periphery of the end of the injection needle 21 located inside the receiving cavity. For example, one end of the buffer spring 25 abuts against the front wall of the receiving cavity, and the other end extends toward the internal opening of the receiving cavity, for providing elastic cushioning and preload when the barrel 40 is loaded.

[0042] For example, when the barrel 40 is inserted from the rear opening of the receiving cavity and pushed forward, the front end of the barrel 40 first abuts against the free end of the buffer spring 25. As the barrel 40 continues to advance, the buffer spring 25 is gradually compressed, and at the same time, the sealing membrane 43 at the front end of the barrel 40 contacts the tip of the injection needle 21. With the continuous advancement of the barrel 40, the tip of the injection needle 21 presses against the sealing membrane 43 and applies concentrated pressure. When the pressure exceeds the bursting strength of the sealing membrane 43, the sealing membrane 43 is punctured, and the needle 21 penetrates the ruptured sealing membrane 43 and inserts into the discharge port. At this time, the injection needle 21 is directly connected to the reinforcing material inside the barrel 40, forming a complete fluid delivery channel.

[0043] It is understood that in this embodiment, the discharge port of the material cylinder 40 is pre-sealed by the sealing membrane 43 to ensure the airtightness of the material cylinder 40 during storage and transportation, and to prevent the reinforcing material from curing prematurely or deteriorating due to moisture. The buffer spring 25 provides elastic cushioning for the insertion of the material cylinder 40, preventing the front end of the material cylinder 40 from rigidly colliding with the injection needle 21 and causing damage; on the other hand, it provides continuous axial preload after the material cylinder 40 is inserted, ensuring that the injection needle 21 is always kept in the correct position in the discharge port, and preventing the needle from coming out due to vibration or pressure fluctuations during the grouting process.

[0044] As a preferred embodiment of the present invention, the control mechanism 30 includes a circuit board 31, and a rechargeable battery, a pressure sensor, and a torque sensor electrically connected to the circuit board 31. The torque sensor is disposed between the output shaft of the drive motor 16 and the wheel 17, and is used to detect the output torque of the drive motor 16. The pressure sensor is disposed on the inner side of the clamping belt 13, and is used to detect the contact pressure between the clamping belt 13 and the ancient building structure. The drive motor 16 and the electric push rod 23 are both electrically connected to the circuit board 31. When the torque sensor detects that the output torque of the drive motor 16 reaches a first preset threshold, it is determined that the clamping belt 13 has been initially tightened and the on-site maintenance device for the ancient building painted layer is in a positioning state. When the pressure sensor detects that the contact pressure between the clamping belt 13 and the ancient building structure reaches a second preset threshold, it is determined that the on-site maintenance device for the ancient building painted layer is in a pressurized clamping state, and the drive motor 16 is stopped to maintain the current tension of the clamping belt 13. The first preset threshold is less than the second preset threshold.

[0045] For example, circuit board 31 is a printed circuit board 31, integrating a microcontroller, a memory chip, and a signal conditioning circuit. For example, the rechargeable battery is a lithium-ion battery pack, which powers circuit board 31, drive motor 16, and electric actuator 23 through a power management module. For example, the torque sensor is a strain gauge torque sensor, coaxially mounted between the output shaft of drive motor 16 and wheel 17, and its signal line is connected to the analog input port of circuit board 31. For example, the pressure sensor is a thin-film flexible pressure sensor, attached to the middle of the inner surface of the clamping strap 13.

[0046] For example, the first preset threshold is a relatively low value of the output torque of the drive motor 16, such as 0.3N to 0.5N, used to characterize the state in which the clamping strap 13 has changed from a relaxed state to a state of being close to the structural surface but without applying a large clamping force, i.e., the initial positioning state. For example, the second preset threshold is a relatively high value of the contact pressure detected by the pressure sensor, such as 40N to 60N, used to characterize that the clamping strap 13 has applied sufficient clamping force to the ancient building structure, i.e., the pressurized clamping state. The first preset threshold is lower than the second preset threshold to ensure the order and distinction between the two states.

[0047] Understandably, during operation, the drive motor 16 rotates forward, driving the wheel 17 to wind up the tensioning belt 13, and the torque sensor detects the output torque in real time. When the torque reaches the first preset threshold, the circuit board 31 determination device is in the positioning state, recording this state without stopping the drive motor 16, which continues to operate. As the tensioning belt 13 tightens further, the contact pressure detected by the pressure sensor gradually increases. When the contact pressure reaches the second preset threshold, the circuit board 31 determination device is in the pressure clamping state, and immediately sends a stop command to the drive motor 16. The drive motor 16 stops rotating and uses its self-locking function to maintain the current tension.

[0048] As a preferred embodiment of the present invention, the control mechanism 30 further includes an injection pressure sensor and an alarm electrically connected to the circuit board 31. The injection pressure sensor is disposed in the flow channel of the injection needle 21 and is used to detect the pressure of the reinforcing material during the injection process. When the injection pressure reaches a first pressure threshold, it is determined that the hollow area has been filled with reinforcing material, and the electric push rod 23 is controlled to stop. When the injection pressure fails to reach the first pressure threshold within a predetermined time, it is determined that there is an abnormality in the hollow area, and the alarm is controlled to issue an alarm signal.

[0049] For example, the injection pressure sensor is a miniature ceramic pressure sensor, encapsulated within the rear flow channel of the injection needle 21. Its pressure-sensing surface is in direct contact with the reinforcing material within the flow channel, used to detect the fluid pressure of the reinforcing material in real time during the grouting process. For example, the alarm is a buzzer or a red-green dual-color indicator light, fixed to the surface of the housing 22 or the control panel, used to issue an audible or visual alarm in abnormal circumstances.

[0050] For example, the first pressure threshold is preset based on the characteristics of the reinforcing material and the size of the hollow area, for example, 0.2 MPa to 0.5 MPa, to characterize the pressure value when the hollow area is completely filled by the reinforcing material and the internal pressure reaches equilibrium. For example, the predetermined time is set based on the estimated volume of the hollow area and the grouting speed, for example, 30 seconds to 60 seconds, to limit the upper limit of the normal duration of the grouting operation.

[0051] Understandably, during the grouting process, the injection pressure sensor continuously feeds back pressure signals to the circuit board 31. When the injection pressure gradually rises and reaches the first pressure threshold, the circuit board 31 determines that the hollow area has been filled with reinforcing material and then sends a stop command to the electric push rod 23, ending the grouting process. If the injection pressure fails to reach the first pressure threshold within the predetermined time, for example, if the injection pressure remains at a low level or fluctuates, the circuit board 31 determines that there may be an abnormality in the hollow area, such as reinforcing material leaking from cracks, the injection needle 21 becoming blocked, or the hollow area being much larger than expected. It then controls the alarm to issue an audible and visual alarm signal to remind the operator to check and handle the situation.

[0052] As a preferred embodiment of the present invention, the control mechanism 30 further includes a start button and a release button electrically connected to the circuit board 31; when the start button is pressed, the control mechanism 30 controls the drive motor 16 to rotate forward, and the wheel 17 to wind up the clamping belt 13 until the torque sensor detects that the output torque of the drive motor 16 reaches the first preset threshold, the drive motor 16 stops, and the on-site maintenance device for the painted layer of the ancient building is in a positioning state; when the release button is pressed, the control mechanism 30 controls the drive motor 16 to rotate in reverse, and the wheel 17 releases the clamping belt 13.

[0053] For example, both the start button and the release button are waterproof self-resetting push-button switches, located on the control panel on the surface of the housing 22, and labeled "Start" and "Release" respectively. The start button is green, and the release button is red, for easy identification by the operator.

[0054] For example, when the operator presses the start button, the circuit board 31 receives the start signal and controls the drive motor 16 to rotate in the forward direction, and the drive wheel 17 to wind up the tension belt 13; the torque sensor detects the output torque in real time and feeds the signal back to the circuit board 31. When the torque value reaches the first preset threshold, the circuit board 31 determines that the tension belt 13 has been initially tightened and the device is in the positioning state, and then sends a stop command to the drive motor 16. The drive motor 16 stops rotating, and the tension belt 13 maintains its current tension state.

[0055] For example, when the repair is completed and the device needs to be removed, the operator presses the release button. The circuit board 31 receives the release signal, controls the drive motor 16 to rotate in the opposite direction, the wheel 17 to rotate in the opposite direction and release the clamping strap 13. The tension of the clamping strap 13 disappears, and the operator can remove the hanging ring 14 from the hook 15, untie the clamping strap 13, and complete the disassembly of the device.

[0056] It is understood that this embodiment achieves one-button operation for fixing and releasing the device through the start button and release button. The operator only needs to press the button twice to complete the installation and disassembly of the device, without having to manually tighten or loosen the clamping strap 13, which greatly reduces the difficulty of operation and labor intensity. At the same time, the clamping process triggered by the start button is automatically completed by the circuit board 31 based on the feedback from the torque sensor, ensuring the consistency and reliability of the fixing force each time.

[0057] As a preferred embodiment of the present invention, a response switch is provided between the circuit board 31 and the electric push rod 23; when the torque sensor detects that the output torque of the drive motor 16 reaches a first preset threshold, the response switch is turned on, and a circuit is formed between the circuit board 31 and the electric push rod 23; when the torque sensor detects that the output torque of the drive motor 16 is lower than the first preset threshold, the response switch is turned off, and an open circuit is formed between the circuit board 31 and the electric push rod 23.

[0058] For example, the response switch is a solid-state relay or a power MOSFET switch, connected in series between the control output port of the electric actuator 23 on the circuit board 31 and the power supply input port of the electric actuator 23. For example, the control terminal of the response switch is connected to the microcontroller on the circuit board 31, and the microcontroller controls the on / off state of the response switch according to the signal from the torque sensor.

[0059] For example, when the output torque detected by the torque sensor reaches the first preset threshold, the microcontroller determines that the device is in the positioning state. At this time, it sends a conduction signal to the control terminal of the response switch, the response switch closes, the power supply circuit between the circuit board 31 and the electric push rod 23 is connected, the electric push rod 23 is energized and can perform the grouting operation. When the output torque detected by the torque sensor is lower than the first preset threshold, for example, when the device has not been installed or the clamping belt 13 is loose, the microcontroller determines that the device is not in the positioning state. At this time, it sends a shutdown signal to the control terminal of the response switch, the response switch opens, the power supply circuit between the circuit board 31 and the electric push rod 23 is cut off, the electric push rod 23 is de-energized and cannot perform the grouting operation.

[0060] It is understandable that the electric push rod 23 can only be energized and work if the device is reliably fixed to the ancient building structure. This avoids problems such as displacement of the injection needle 21 and spraying of reinforcement material into non-target areas caused by accidental triggering of grouting when the device is not yet fixed or is not securely fixed.

[0061] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A device for on-site maintenance of painted layers on ancient buildings, characterized in that, Used to repair hollow areas between the painted layer and the ground layer of ancient building structures, including: A pressure positioning mechanism is used to detachably fix the on-site maintenance device for the painted layer of the ancient building onto the ancient building structure; The infusion mechanism disposed on the pressurizing and positioning mechanism includes a driving component, a loading component, and an injection needle. The loading component is provided with a receiving cavity for holding the material cylinder. The driving component is disposed at one end of the receiving cavity, and the injection needle is disposed at the other end of the receiving cavity. The control mechanism, which is installed on the injection mechanism, is electrically connected to the drive assembly and the pressure positioning mechanism. It is used to control the start-up, stop and operation speed of the drive assembly, as well as the clamping force of the pressure positioning mechanism on the ancient building structure.

2. The on-site maintenance device for the painted layer of ancient buildings according to claim 1, characterized in that, The pressurization and positioning mechanism includes a base and multiple negative pressure suction cups; a through hole is provided in the center of the base, the infusion mechanism is provided on one side of the base, and the injection needle passes through the through hole; multiple negative pressure suction cups are provided on the other side of the base, and the multiple negative pressure suction cups are arranged around the through hole.

3. The on-site maintenance device for the painted layer of ancient buildings according to claim 2, characterized in that, The pressure positioning mechanism also includes a drive motor, a wheel, a clamping belt, a hanging ring, and a hook; the drive motor is fixedly mounted on one side of the base, the wheel is drivenly connected to the output shaft of the drive motor, one end of the clamping belt is fixedly connected to the wheel and wrapped around the outer circumference of the wheel; the hook is fixedly mounted on the other side of the base; the hanging ring is fixedly connected to the other end of the clamping belt, and the hanging ring is used to hook the clamping belt into the hook after the clamping belt passes around the ancient building structure.

4. The on-site maintenance device for the painted layer of ancient buildings according to claim 3, characterized in that, The material cylinder includes a cylinder body and a cylinder plate. The cylinder plate is movably disposed inside the cylinder body. The reinforcing material for filling the hollow area is housed within the enclosed space of the cylinder body and the cylinder plate. The front end of the cylinder body is provided with a discharge port. The loading assembly includes a housing connected to the pressurizing and positioning mechanism, and the receiving cavity is formed in the housing; the driving assembly includes an electric push rod and a push plate, the electric push rod is fixed to the rear end of the housing, and the push rod of the electric push rod passes through the housing to the receiving cavity, the push plate is disposed in the receiving cavity and connected to the push rod; the injection needle is fixed to the front end of the housing and communicates with the receiving cavity; When the control mechanism supplies power to the electric push rod, the push rod pushes the push plate and the cylinder plate to move forward in the cylinder, squeezing the reinforcing material in the cylinder into the injection needle through the discharge port, and then injecting it into the hollow area by the injection needle; when the control mechanism cuts off power to the electric push rod, the push rod of the electric push rod retracts.

5. The on-site maintenance device for the painted layer of ancient buildings according to claim 4, characterized in that, A sealing membrane is provided at the discharge port; the loading assembly also includes a buffer spring, which is disposed inside the front end of the receiving cavity; one end of the injection needle is located inside the receiving cavity, and the other end is located outside the receiving cavity; When the material cylinder is loaded into the receiving cavity, the front end of the material cylinder abuts against the buffer spring, the sealing membrane abuts against one end of the injection needle, and is punctured by one end of the injection needle under the continuous advancement of the material cylinder; after the injection needle punctures the sealing membrane, one end of the injection needle is inserted into the discharge port, and the reinforcing material is in communication with the injection needle.

6. The on-site maintenance device for the painted layer of ancient buildings according to claim 4, characterized in that, The control mechanism includes a circuit board, and a rechargeable battery, a pressure sensor, and a torque sensor electrically connected to the circuit board; the torque sensor is disposed between the output shaft of the drive motor and the wheel, and is used to detect the output torque of the drive motor; the pressure sensor is disposed on the inner side of the clamping strap, and is used to detect the contact pressure between the clamping strap and the ancient building structure; the drive motor and the electric push rod are both electrically connected to the circuit board; Specifically, when the torque sensor detects that the output torque of the drive motor reaches a first preset threshold, it is determined that the clamping strap has been initially tightened and the on-site maintenance device for the ancient building's painted layer is in a positioning state; when the pressure sensor detects that the contact pressure between the clamping strap and the ancient building structure reaches a second preset threshold, it is determined that the on-site maintenance device for the ancient building's painted layer is in a pressurized clamping state, and the drive motor is controlled to stop, so that the clamping strap maintains its current tension; the first preset threshold is less than the second preset threshold.

7. The on-site maintenance device for the painted layer of ancient buildings according to claim 6, characterized in that, The control mechanism also includes an injection pressure sensor and an alarm electrically connected to the circuit board. The injection pressure sensor is disposed in the flow channel of the injection needle and is used to detect the pressure of the reinforcing material during the injection process. Specifically, when the injection pressure reaches the first pressure threshold, it is determined that the hollow area has been filled with reinforcing material, and the electric push rod is controlled to stop; when the injection pressure fails to reach the first pressure threshold within a predetermined time, it is determined that there is an abnormality in the hollow area, and the alarm is controlled to issue an alarm signal.

8. The on-site maintenance device for the painted layer of ancient buildings according to claim 6, characterized in that, The control mechanism also includes a start button and a release button electrically connected to the circuit board; When the start button is pressed, the control mechanism controls the drive motor to rotate forward, and the wheel rewinds the clamping belt until the torque sensor detects that the output torque of the drive motor reaches the first preset threshold. Then the drive motor stops, and the on-site maintenance device for the painted layer of the ancient building is in a positioning state. When the release button is pressed, the control mechanism controls the drive motor to reverse, and the wheel releases the clamping belt.

9. The on-site maintenance device for the painted layer of ancient buildings according to claim 6, characterized in that, A response switch is provided between the circuit board and the electric push rod; When the torque sensor detects that the output torque of the drive motor reaches the first preset threshold, the response switch is turned on, and a circuit is formed between the circuit board and the electric push rod; when the torque sensor detects that the output torque of the drive motor is lower than the first preset threshold, the response switch is turned off, and an open circuit is formed between the circuit board and the electric push rod.

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