An adjustable weight trestle counterweight device and method of installation and adjustment

Abstract

The application discloses a weight-adjustable trestle counterweight device and a mounting and adjusting method, and at least comprises a main box chamber arranged below the trestle, wherein a liquid injection pipe, a breather pipe and a liquid discharge port are arranged on the main box chamber; a liquid pumping pump is arranged at the liquid injection pipe, and valves are arranged at the breather pipe and the liquid discharge port. The trestle counterweight device can automatically counterweight and reduce the weight of the trestle according to the stress condition of the trestle during construction, maintenance and use, and the safety of the trestle structure is improved; the device is convenient to install, has an attractive structure, meets the requirements of the trestle counterweight, and also meets the needs of beautifying the urban environment.

Description

Technical Field

[0001] This invention belongs to the field of bridge ancillary structure design and construction, specifically relating to an adjustable weight trestle bridge counterweight device and its installation method. Background Technology

[0002] Piers not only provide pedestrian access but also serve as urban attractions for tourists, making them increasingly common in modern urban construction. Compared to conventional bridges, piers are narrower, longer, and lighter in structure. During the design process, to ensure the stability of piers and prevent swaying or even overturning, ballast is often applied. However, conventional ballast methods (such as using high-density concrete or grouting in enclosed box girder bridges) may not meet the stability requirements of piers. Firstly, the small cross-section of the pier structure means that the weight applied using conventional methods is insufficient to meet design requirements. Secondly, conventional ballast methods are one-time applications and cannot be adjusted based on regular maintenance and inspections. Furthermore, after a pier is put into use, inspection and maintenance are carried out according to a planned schedule, with long intervals between these procedures. This makes it difficult to promptly detect and repair sudden structural damage caused by special loads or natural disasters during use. Therefore, research on adjustable weight counterweight devices for trestle bridges has practical engineering value. Summary of the Invention

[0003] To address the aforementioned problems with the counterweight of trestle bridges, this invention provides an adjustable weight trestle bridge counterweight device and its installation method.

[0004] To achieve the above objectives, the present invention provides an adjustable weight counterweight device for a trestle, which includes at least a main chamber disposed below the trestle, wherein the main chamber is provided with an injection pipe, a vent pipe, and a drain outlet. A liquid pump is installed at the injection pipe, and valves are installed at the vent pipe and the drain port.

[0005] Furthermore, a liquid level display device is installed on one side of the main chamber.

[0006] Furthermore, an auxiliary chamber is provided on one side of the main chamber, and a door panel is provided on one side wall of the auxiliary chamber; the liquid level display device is located in the auxiliary chamber.

[0007] Furthermore, a fixing component is provided below the trestle along the length of the trestle, and the main compartment is fixed to the bottom of the trestle by the fixing component.

[0008] Furthermore, the cross-section of the fastener is L-shaped or inverted T-shaped; an L-shaped or inverted T-shaped slot is correspondingly provided on the upper surface of the main chamber; the main chamber is connected to the fastener through the L-shaped or inverted T-shaped slot.

[0009] Furthermore, a rubber pad is provided on the outer surface of the fastener.

[0010] Furthermore, the bottom plate of the main chamber has a certain slope in the longitudinal direction of the bridge, and the lowest point of the slope of the bottom plate of the main chamber in the longitudinal direction is at the drain outlet, so as to facilitate the discharge of the counterweight liquid from the drain outlet.

[0011] Furthermore, a liquid injection slot is recessed at the bottom of the main chamber, and the liquid injection pipe is installed inside the liquid injection slot.

[0012] Furthermore, a stress-strain monitor is installed on the aforementioned trestle; The drain outlet is equipped with a drain outlet valve; It also includes a control device for controlling the pump to inject liquid into the main chamber or controlling the drain valve to drain liquid from the main chamber based on the signal from the stress-strain monitor.

[0013] Furthermore, it also includes a liquid storage tank, and the injection pipe is connected to the liquid storage tank; the drain outlet of the drain valve is provided with a drain pipe, and the drain outlet of the drain pipe is connected to the liquid storage tank.

[0014] To achieve the above objectives, the installation method of the adjustable weight trestle counterweight device of the present invention includes the following steps: (1): Stress and strain monitors are installed on the trestle bridge; (2): Determine the shape, size and weighting fluid of the trestle device based on the counterweight requirements of the trestle design and the aesthetic requirements of the landscape; (3): The injection pipe and the pump are assembled to form a combined component; (4): The vent pipe and the vent pipe valve are assembled to form a combined component two; (5): The drain outlet, drain outlet valve, transition pipe, liquid level display pipe and liquid level display pipe valve are assembled to form a combined component three; (6): According to the dimensions of the injection pipe, vent pipe and transition pipe, holes are made in the main chamber. Then, the first, second and third components are connected to the main chamber tightly and firmly. The liquid level display pipe is connected to the main chamber by buckle. The main chamber sealing door is connected to the main chamber by sealing door connector. The auxiliary chamber door is connected to the auxiliary chamber by door connector. The control device is installed in the auxiliary chamber to form the upper structure of the trestle counterweight device. (7): The upper structure of the trestle counterweight device is connected to the trestle through a continuous fixed component and a continuous rubber pad that are firmly connected to the lower edge of the trestle; (8): The liquid inlet and outlet of the counterweight device, the liquid inlet and outlet switch of the counterweight device, the vent pipe of the liquid storage tank and the valve of the vent pipe of the liquid storage tank are firmly connected to form a combined component four; (9): The liquid storage tank is connected to the four-part composite component and buried below ground level to form the lower structure of the trestle counterweight device; (10): The injection pipe connects the liquid storage tank to the injection pipe, and the drain pipe connects the liquid storage tank to the drain outlet. The cable connects the control device to the stress-strain monitor, the pump, the vent valve, the drain outlet valve, the liquid level display valve, and the vent valve of the liquid storage tank.

[0015] (11): Inject counterweight liquid from the liquid inlet and outlet of the counterweight device to form a complete adjustable weight bridge counterweight device.

[0016] (12): By adjusting the valve of the trestle counterweight device through the control device, the liquid pump is started to draw counterweight liquid from the liquid storage tank into the main tank chamber, thereby increasing the counterweight of the trestle; or by adjusting the valve of the trestle counterweight device and the liquid pump through the control device, the counterweight liquid is discharged from the main tank chamber into the liquid storage tank, thereby reducing the counterweight of the trestle.

[0017] When adding counterweight to the trestle, the drain valve is closed, while the vent valve, liquid level display valve, and liquid storage tank vent valve are all open, and the pump is running. After the counterweight on the trestle reaches the required level, the pump stops running, and the drain valve, vent valve, liquid level display valve, and liquid storage tank vent valve are all closed. When the trestle reduces its counterweight, the pumping unit is stopped, and the vent valve, liquid level display valve, and liquid storage tank vent valve are open, while the drain valve is open. After the trestle counterweight reaches the required level, the drain valve, vent valve, liquid level display valve, and liquid storage tank vent valve should all be closed.

[0018] To achieve the above objectives, the adjustment method of the adjustable weight trestle counterweight device of the present invention includes the following steps: (1) Real-time monitoring of the trestle bridge using a stress-strain monitor; (2) When the stress and strain data monitored by the stress and strain monitor is less than the minimum stress and strain setting value, the drain valve is closed, the vent pipe valve, the liquid level display pipe valve and the liquid storage tank vent pipe valve are opened, the pump runs, and the predetermined amount of counterweight liquid in the liquid storage tank is injected into the main tank chamber through the injection pipe. (3) When the stress and strain data monitored by the stress and strain monitor is greater than the maximum stress and strain setting value, the pumping pump remains in a non-working state, the vent pipe valve, the liquid level display pipe valve and the liquid storage tank vent pipe valve are opened, the drain valve is opened, and the predetermined amount of counterweight liquid in the main tank is discharged into the liquid storage tank through the drain pipe. (4) After a predetermined time following the execution of step (2) or step (3), return to step (1).

[0019] The trestle counterweight device of this invention incorporates stress and strain monitors on the trestle, providing real-time feedback on the trestle's stress and deformation to the control device. The control device's program logic dynamically adjusts the trestle's counterweight, playing a beneficial role in the design, construction, maintenance, and commissioning of the trestle, ensuring structural safety against stress and deformation. The counterweight device is equipped with a liquid level display tube, which, based on the principle of communicating vessels, accurately indicates the volume of the counterweight fluid inside the device, providing feedback to the control device on the volume and converted mass of the counterweight fluid in the main tank. A corresponding wireless handheld display is also provided, allowing operators to visually perceive the trestle's stress and strain conditions and the weight of the counterweight in data form. The main structure of the trestle bridge counterweight device is connected to the trestle bridge via a continuous fixed component, facilitating its installation, disassembly, and reuse. Furthermore, the device enables real-time monitoring of the trestle bridge structure's safety and achieves fully automated operation of counterweighting and weight reduction through a control system, minimizing manual labor costs. The device's shape and paint color can be designed to meet landscape requirements. This device is easy to install, aesthetically pleasing, meets the needs of trestle bridge counterweighting, and also satisfies the need to beautify the urban environment. Attached Figure Description

[0020] Figure 1 This is a cross-sectional view of the EE in Embodiment 1 of the present invention; Figure 2 This is a cross-sectional view of FF in Embodiment 1 of the present invention; Figure 3 This is a cross-sectional view of GG in Embodiment 1 of the present invention; Figure 4 This is a cross-sectional view of HH in Embodiment 1 of the present invention; Figure 5 This is a cross-sectional view of embodiment 1 of the present invention; Figure 6 This is a cross-sectional view of BB in Embodiment 1 of the present invention; Figure 7 This is a CC cross-sectional view of Embodiment 1 of the present invention; Figure 8 This is a DD cross-sectional view of Embodiment 1 of the present invention; Figure 9The figures are the EE and CC cross-sectional views of the first composite component in Embodiment 1 of the present invention. Figure 10 The figures shown are the GG and BB cross-sectional views of the second composite component in Embodiment 1 of the present invention. Figure 11 The figures shown are cross-sectional views II and BB of the combined component three in Embodiment 1 of the present invention. Figure 12 This is an enlarged detailed view of the fourth composite component in Embodiment 1 of the present invention; Figure 13 This is a construction flowchart of an adjustable weight trestle counterweight device according to Embodiment 2 of the present invention; In the diagram, 1—Main chamber, 2—Auxiliary chamber, 2-2—Auxiliary chamber door panel, 2-3—Door panel connector, 3—Injection pipe, 4—Ventilation pipe, 5—Transition pipe, 6—Drain outlet, 7—Liquid level display pipe, 8-1—Liquid pump, 8-2—Ventilation pipe valve, 8-3—Drain outlet valve, 8-4—Liquid level display pipe valve, 9—Snap fastener, 10—Long-length fixing component, 11—Long-length rubber pad, 12—Stress and strain monitor, 13—Control device, 13-2—Wireless handheld display corresponding to the control device, 14—Injection pipe, 15—Drainage pipe, 16—Liquid storage tank, 17—Liquid inlet and outlet of the counterweight device, 17-2—Liquid inlet and outlet switch of the counterweight device, 17-3—Ventilation pipe of the liquid storage tank, 17-4—Ventilation pipe valve of the liquid storage tank, 18—Counterweight liquid. Detailed Implementation

[0021] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0022] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0023] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0024] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0025] Example 1 The following describes Embodiment 1 of the present invention in detail with reference to the accompanying drawings.

[0026] This embodiment provides an adjustable weight counterweight device for a trestle.

[0027] See appendix Figures 1 to 11 The invention device mainly includes: a main chamber 1, an auxiliary chamber 2, an auxiliary chamber door panel 2-2, a door panel connector 2-3, an injection pipe 3, a vent pipe 4, a transition pipe 5, a drain outlet 6, a liquid level display pipe 7, a pump 8-1, a vent pipe valve 8-2, a drain outlet valve 8-3, a liquid level display pipe valve 8-4, a buckle 9, a continuous fixing component 10, a continuous rubber pad 11, a stress and strain monitor 12, a control device 13, a wireless handheld display corresponding to the control device 13-2, an injection pipe 14, a drain pipe 15, a liquid storage tank 16, a counterweight device liquid inlet and outlet 17, a counterweight device liquid inlet and outlet switch 17-2, a liquid storage tank vent pipe 17-3, a liquid storage tank vent pipe valve 17-4, and a counterweight liquid 18.

[0028] Stress and strain monitors 12 are installed at locations of high stress, significant structural deformation (such as the mid-span of the trestle), and areas where the trestle cross-section changes. (See...) Figures 1 to 8 .

[0029] The structural dimensions of the main tank chamber 1, auxiliary tank chamber 2, and liquid storage tank 16 were determined based on a comprehensive consideration of factors such as the design, construction, maintenance, and aesthetics of the trestle. The counterweight liquid 18 is selected from a liquid material with high density and good fluidity. During the fabrication of the main tank chamber, a groove is formed at a suitable location at the bottom to facilitate the concealment and placement of the injection pipe 3. (See...) Figure 9 .

[0030] The injection pipe 3 and the pump 8-1 are firmly connected to form a combined component one. When the pump 8-1 in the combined component one is in working condition, the channel of the combined component one is open, realizing the function of drawing the counterweight liquid 18 into the main chamber 1; when the pump 8-1 in the combined component one is not in working condition, the channel of the combined component one is closed, ensuring that the counterweight liquid 18 in the main chamber 1 does not leak out. The longitudinal and cross-sectional views of the combined component one are shown in [reference needed]. Figure 9 .

[0031] Vent pipe 4 and vent pipe valve 8-2 are securely connected to form composite component two. When composite component two is open, it ensures that the air pressure inside the main chamber 1 is the same as the external ambient air pressure. When composite component two is closed, it ensures that the counterweight liquid 18 inside the main chamber 1 does not evaporate or lose. See the longitudinal and cross-sectional views of composite component two. Figure 10 .

[0032] Drainage port 6 and drainage port valve 8-3 are securely connected to form component A. When component A is open, it provides a channel for discharging the counterweight liquid 18; when component A is closed, it ensures that the counterweight liquid 18 in the main chamber 1 does not leak. Liquid level display pipe 7 and liquid level display pipe valve 8-4 are securely connected to form component B. When component B is open, it allows querying and feedback of the counterweight liquid 18 volume in the main chamber 1; when component B is closed, it ensures that the counterweight liquid 18 in the main chamber 1 does not evaporate and lose. Components A and B are securely connected to transition pipe 5 to form combined component three. See the longitudinal and cross-sectional views of combined component three. Figure 11 .

[0033] Control device 13 is installed in the space of auxiliary chamber 2, see Figure 1 , Figure 3 and Figure 6 .

[0034] The main compartment 1, auxiliary compartment 2, combined component 1, combined component 2, combined component 3, auxiliary compartment door panel 2-2, door panel connector 2-3, and buckle 9 are assembled and connected tightly to form the upper structure of the trestle counterweight device.

[0035] A continuous fixed component 10 is installed on the lower edge of the trestle bridge, and a continuous rubber pad 11 is tightly attached to the continuous fixed component 10. The continuous rubber pad can prevent the displacement of the trestle bridge counterweight device and plays a role in shock absorption and vibration isolation. See Figures 5 to 8 .

[0036] The upper structure of the trestle counterweight device is moved and engaged with the continuous fixing component 10, achieving a secure connection between the upper structure of the trestle counterweight device and the trestle. (See...) Figures 5 to 8 .

[0037] The counterweight device liquid inlet / outlet 17, the counterweight device liquid inlet / outlet switch 17-2, the liquid storage tank vent pipe 17-3, and the liquid storage tank vent pipe valve 17-4 are securely connected to form a combined component four. (See section four.) Figure 12 The surface coating of the liquid inlet / outlet switch 17-2 of the counterweight device is consistent with the color and shape of the ground paving to ensure aesthetics.

[0038] The liquid storage tank 16 is firmly connected to the four combined components and is buried below ground level, forming the lower structure of the trestle counterweight device.

[0039] The liquid storage tank 16 is connected to the injection pipe 3 via the injection pipe 14; the liquid storage tank 16 is connected to the drain port 6 via the drain pipe 15. The control device 13 is connected to the stress-strain monitor 12, the pump 8-1, the vent valve 8-2, the drain port valve 8-3, the liquid level display valve 8-4, and the liquid storage tank vent valve 17-4 via cables.

[0040] Open the liquid inlet / outlet switch 17-2 of the counterweight device, and inject the counterweight liquid 18 as required. After the counterweight liquid 18 is injected, close the liquid inlet / outlet switch 17-2 of the counterweight device. Control device 13 is activated, and the adjustable-weight trestle counterweight device operates. The automated trestle counterweight device adjusts the counterweight in real time according to changes in the stress and strain of the trestle. See... Figures 1 to 8 .

[0041] The control device 13 can be a PLC or a microcontroller, etc., and its control functions are as follows: the control device 13 can control the operation and stop of the liquid pump 8-1; the control device 13 can control the opening and closing of the vent pipe valve 8-2, the drain port valve 8-3, the liquid level display pipe valve 8-4, and the liquid storage tank vent pipe valve 17-4.

[0042] The control device 13 monitors the deformation and stress of the trestle structure through the stress and strain monitor 12, and can also monitor the liquid level in the main tank chamber by installing an electronic level gauge inside the tank and convert it into weight.

[0043] Control device 13 operating program logic: (I) Operation of the trestle counterweight device to add counterweight. When the stress-strain data fed back to the control device 13 by the stress-strain monitor 12 is less than the minimum stress-strain setting value, the drain valve 8-3 closes, and the vent valve 8-2, liquid level display valve 8-4, and liquid storage tank vent valve 17-4 open. The pump 8-1 starts, injecting the counterweight liquid 18 from the liquid storage tank 16 into the main chamber 1 through the injection pipe 14. When the stress-strain data fed back to the control device 13 by the stress-strain monitor 12 reaches a suitable range, the trestle counterweight device stops the counterweight operation, the pump 8-1 stops working, and the vent valve 8-2, liquid level display valve 8-4, and liquid storage tank vent valve 17-4 close. The liquid level display tube 7 displays the volume of the counterweight liquid 18 in the main chamber 1 and feeds it back to the control device 13. The stress-strain data of the trestle and the liquid volume and converted weight in the main chamber 1 can be viewed in real time through the wireless handheld display 13-2 corresponding to the control device.

[0044] (II) Operation of the counterweight device on the trestle to reduce the counterweight. When the stress-strain data fed back to the control device 13 by the stress-strain monitor 12 is greater than the maximum stress-strain setting value, the pump 8-1 remains in a non-operating state, the vent valve 8-2, the liquid level display valve 8-4, and the liquid storage tank vent valve 17-4 are opened, and the drain valve 8-3 is opened, draining the counterweight liquid 18 in the main chamber 1 into the liquid storage tank 16 through the drain pipe 15. When the stress-strain data fed back to the control device 13 by the stress-strain monitor 12 reaches a suitable range, the counterweight device on the trestle stops reducing the weight, the drain valve 8-3 is closed, and subsequently the vent valve 8-2, the liquid level display valve 8-4, and the liquid storage tank vent valve 17-4 are closed. The liquid level display tube 7 displays the volume of the counterweight liquid 18 in the main chamber 1 and feeds it back to the control device 13. The stress and strain data of the trestle and the liquid volume and converted weight in the main chamber 1 can be viewed in real time through the wireless handheld display 13-2 corresponding to the control device.

[0045] Example 2 The following detailed description of Embodiment 2 of the present invention, with reference to the accompanying drawings, will be provided in detail. This embodiment provides a method for installing an adjustable weight counterweight device for a trestle bridge, including the following steps: See Figure 13 : Step 1: Install stress and strain monitors 12 on the trestle. The stress and strain monitors 12 are installed according to the stress and deformation characteristics of the trestle. Step 2: Design the dimensions of the trestle counterweight device and select the counterweight fluid 18. Calculate and determine the cross-sectional dimensions and lengths of the main chamber 1, auxiliary chamber 2, and liquid storage tank 16. Create a slot at a suitable location at the bottom of the main chamber 1 for connecting the injection pipe 3, ensuring an aesthetically pleasing appearance. Select a suitable counterweight fluid 18.

[0046] Step 3: Assemble component one. Assemble the injection tube 3 and the pump 8-1. After assembly, check the tightness of the connection of component one. The inspection result must be qualified.

[0047] Step 4: Assemble component two. Assemble the vent pipe 4 and vent pipe valve 8-2. After assembly, check the airtightness of component two. The inspection result must be qualified.

[0048] Step 5: Assemble component three. Assemble drain port 6 and drain port valve 8-3, and securely connect them to transition pipe 5; assemble liquid level display pipe 7 and liquid level display pipe valve 8-4, and securely connect them to transition pipe 5. After assembly, check the airtightness of component three; the inspection result must be satisfactory.

[0049] Step 6: Connect the components to form the upper structure of the trestle counterweight device. Make a hole in the slot of the main chamber 1 according to the cross-sectional dimensions of the injection pipe 3, and then securely connect the first assembly to the main chamber 1. Make a hole in the side plate of the main chamber 1 according to the cross-sectional dimensions of the vent pipe 4, and then securely connect the second assembly to the main chamber 1. Make a hole in the side plate of the main chamber 1 according to the cross-sectional dimensions of the transition pipe 5, and then securely connect the third assembly to the main chamber 1. Set a buckle 9 to fix the liquid level display pipe 7 to the upper side plate of the main chamber 1. Securely connect the auxiliary chamber 2 to the main chamber 1. Place the control device 13 in a suitable position inside the auxiliary chamber 2. Connect the auxiliary chamber door 2-2 to the auxiliary chamber 2 through the door connector 2-3 to realize the opening and closing function of the auxiliary chamber door 2-2.

[0050] Step 7: Connect the upper structure of the trestle counterweight device to the trestle. The continuous fixing member 10 is firmly connected to the lower edge of the trestle, and the continuous rubber pad 11 is tightly attached to the appropriate position of the continuous fixing member 10; connect the upper structure of the trestle counterweight device to the trestle through the continuous fixing member 10 and the continuous rubber pad 11.

[0051] Operation 8: Assemble component four. Assemble the liquid inlet / outlet 17 of the counterweight device, the liquid inlet / outlet switch 17-2 of the counterweight device, the vent pipe 17-3 of the liquid storage tank, and the vent pipe valve 17-4 of the liquid storage tank. After assembly, check the airtightness of component four. The inspection result must be qualified.

[0052] Operation 9: Connect the components to form the lower structure of the bridge counterweight device. Securely connect the fourth composite component to the liquid storage tank 16.

[0053] Operation 10: Connect the upper and lower structures of the trestle counterweight device via pipes, and connect the control device and various control components via cables. The injection pipe 14 connects the liquid storage tank 16 to the injection pipe 3; the drainage pipe 15 connects the liquid storage tank 16 to the drainage port 6. Cables connect the control device 13 to the stress-strain monitor 12, the pump 8-1, the vent valve 8-2, the drainage port valve 8-3, the liquid level display valve 8-4, and the liquid storage tank vent valve 17-4, respectively.

[0054] Operation 11: Inject counterweight fluid. Inject the required counterweight fluid 18 through the liquid inlet / outlet switch 17-2 of the counterweight device.

[0055] Step 12: Automatic Counterweight Addition Operation—When the monitored data of the automated trestle counterweight device is lower than the warning value, the counterweight addition program is executed. If the stress-strain data fed back to the control device 13 by the stress-strain monitor 12 is less than the minimum stress-strain setting value, the drain valve 8-3 closes, while the vent valve 8-2, liquid level display valve 8-4, and liquid storage tank vent valve 17-4 open. The pump 8-1 operates, injecting the counterweight liquid 18 from the liquid storage tank 16 into the main chamber 1 through the injection pipe 14. When the stress-strain data fed back to the control device 13 by the stress-strain monitor 12 reaches a suitable range, the trestle counterweight device stops the counterweight operation, the pump 8-1 stops working, and the vent valve 8-2, liquid level display valve 8-4, and liquid storage tank vent valve 17-4 close. The liquid level display tube 7 displays the volume of the counterweight liquid 18 in the main chamber 1 and feeds it back to the control device 13. The stress and strain data of the trestle and the liquid volume and converted weight in the main chamber 1 can be viewed in real time through the wireless handheld display 13-2 corresponding to the control device.

[0056] Step 13: Automatic Counterweight Reduction Operation—When the monitored data of the automated trestle counterweight device exceeds the warning value, the counterweight reduction program is executed. If the stress-strain data fed back to the control device 13 by the stress-strain monitor 12 exceeds the maximum stress-strain setting value, the pump 8-1 remains inactive. The vent valve 8-2, liquid level display valve 8-4, and liquid storage tank vent valve 17-4 are opened, and the drain valve 8-3 is opened, draining the counterweight liquid 18 from the main chamber 1 into the liquid storage tank 16 through the drain pipe 15. When the stress-strain data fed back to the control device 13 by the stress-strain monitor 12 reaches a suitable range, the trestle counterweight device stops the weight reduction operation, the drain valve 8-3 is closed, and subsequently, the vent valve 8-2, liquid level display valve 8-4, and liquid storage tank vent valve 17-4 are closed. The liquid level display tube 7 displays the volume of the counterweight liquid 18 in the main chamber 1 and feeds it back to the control device 13. The stress and strain data of the trestle and the liquid volume and converted weight in the main chamber 1 can be viewed in real time through the wireless handheld display 13-2 corresponding to the control device.

[0057] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0058] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An adjustable weight trestle counterweight device, characterized by, It includes at least a main chamber located below the trestle bridge, and the main chamber is equipped with an injection pipe, a vent pipe, and a drain outlet; A liquid pump is installed at the injection pipe, and valves are installed at the vent pipe and the drain port; Stress and strain monitors are installed on the aforementioned trestle; The drain outlet is equipped with a drain outlet valve; It also includes a control device for controlling the pump to inject liquid into the main tank chamber or controlling the drain valve to drain liquid from the main tank chamber based on the signal from the stress and strain monitor. It also includes a liquid storage tank, and the injection pipe is connected to the liquid storage tank; the drain outlet of the drain valve is provided with a drain pipe, and the drain outlet of the drain pipe is connected to the liquid storage tank. The installation method of the adjustable weight trestle counterweight device includes the following steps: (1): Stress and strain monitors are installed on the trestle bridge; (2): Determine the shape, size and weighting fluid of the trestle device based on the counterweight requirements of the trestle design and the aesthetic requirements of the landscape; (3): The injection pipe and the pump are assembled to form a combined component; (4): The vent pipe and the vent pipe valve are assembled to form a combined component two; (5): The drain outlet, drain outlet valve, transition pipe, liquid level display pipe and liquid level display pipe valve are assembled to form a combined component three; (6): According to the dimensions of the injection pipe, vent pipe and transition pipe, holes are made in the main chamber. Then, the first, second and third components are connected to the main chamber tightly and firmly. The liquid level display pipe is connected to the main chamber by buckle. The main chamber sealing door is connected to the main chamber by sealing door connector. The auxiliary chamber door is connected to the auxiliary chamber by door connector. The control device is installed in the auxiliary chamber to form the upper structure of the trestle counterweight device. (7): The upper structure of the trestle counterweight device is connected to the trestle through a continuous fixed component and a continuous rubber pad that are firmly connected to the lower edge of the trestle; (8): The liquid inlet and outlet of the counterweight device, the liquid inlet and outlet switch of the counterweight device, the vent pipe of the liquid storage tank and the valve of the vent pipe of the liquid storage tank are firmly connected to form a combined component four; (9): The liquid storage tank is connected to the four-part composite component and buried below ground level to form the lower structure of the trestle counterweight device; (10): The injection pipe connects the liquid storage tank to the injection pipe, and the drain pipe connects the liquid storage tank to the drain outlet; the cable connects the control device to the stress and strain monitor, the pump, the vent valve, the drain outlet valve, the liquid level display valve, and the vent valve of the liquid storage tank respectively. (11): Inject counterweight liquid from the liquid inlet and outlet of the counterweight device to form a complete adjustable weight bridge counterweight device; (12): By adjusting the valve of the trestle counterweight device through the control device, the liquid pump is started to draw counterweight liquid from the liquid storage tank into the main tank chamber, thereby increasing the counterweight of the trestle; or by adjusting the valve of the trestle counterweight device and the liquid pump through the control device, the counterweight liquid is discharged from the main tank chamber into the liquid storage tank, thereby reducing the counterweight of the trestle. When adding counterweight to the trestle, the drain valve is closed, while the vent valve, liquid level display valve, and liquid storage tank vent valve are all open, and the pump is running. After the counterweight on the trestle reaches the required level, the pump stops running, and the drain valve, vent valve, liquid level display valve, and liquid storage tank vent valve are all closed. When the trestle reduces its counterweight, the pumping unit is stopped, and the vent valve, liquid level display valve, and liquid storage tank vent valve are open, while the drain valve is open. After the trestle counterweight reaches the required level, the drain valve, vent valve, liquid level display valve, and liquid storage tank vent valve should all be closed.

2. The adjustable weight wharf counterweight apparatus of claim 1, wherein, A liquid level display device is installed on one side of the main chamber.

3. The adjustable weight counterweight device for a trestle bridge as described in claim 2, characterized in that, An auxiliary chamber is provided on one side of the main chamber, and a door panel is provided on one side wall of the auxiliary chamber; the liquid level display device is located in the auxiliary chamber.

4. The adjustable weight counterweight device for a trestle bridge as described in claim 1, characterized in that, A fixing component is provided below the trestle along the length of the trestle, and the main compartment is fixed to the bottom of the trestle by the fixing component. The cross-section of the fastener is L-shaped or inverted T-shaped; an L-shaped or inverted T-shaped slot is correspondingly provided on the upper surface of the main chamber; the main chamber is connected to the fastener through the L-shaped or inverted T-shaped slot; A rubber pad is provided on the outer surface of the fastener.

5. The adjustable weight counterweight device for a trestle bridge as described in claim 1, characterized in that: The bottom plate of the main chamber has a certain slope in the longitudinal direction of the bridge, and the lowest point of the slope of the bottom plate of the main chamber in the longitudinal direction of the bridge is at the drain outlet, so as to facilitate the discharge of the counterweight liquid from the drain outlet.

6. The adjustable weight counterweight device for a trestle bridge as described in claim 1, characterized in that: A liquid injection slot is recessed at the bottom of the main chamber, and the liquid injection pipe is installed inside the liquid injection slot.

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