Gas circuit control system for roadbed detection continuous load

Abstract

The utility model discloses a continuous load gas circuit control system for roadbed detection, which relates to the technical field of roadbed detection and comprises a dynamic load subsystem and a static load subsystem. The dynamic load subsystem comprises a first electromagnetic directional valve, a dynamic load generating cylinder and a throttling speed regulating valve; the static load subsystem comprises an air supply solenoid valve, a second solenoid directional valve, an exhaust speed regulating valve, an exhaust solenoid valve, a static load generation cylinder and an air supply speed regulating valve; according to the utility model, the air cylinder can respectively generate a continuous circulating dynamic load and a stable and uniformly distributed static load on a roadbed by utilizing air path control.

Description

Technical Field

[0001] This utility model relates to the field of roadbed testing technology, and in particular to a pneumatic control system for continuous load testing of roadbeds. Background Technology

[0002] The resilient modulus of the roadbed, as an important indicator of the roadbed's bearing capacity, is a crucial testing item in road inspection. Currently, the commonly used equipment and methods for road deflection testing are mainly divided into static deflection testing equipment and dynamic deflection testing equipment. Neither the Benkelman beam (BB) method nor the falling weight deflectometer (FWD) method can apply high-frequency, continuous cyclic loads to a single testing point. Utility Model Content

[0003] The purpose of this invention is to provide a pneumatic control system for detecting continuous loads on roadbeds, which can simultaneously output stable and uniform static loads and stable and continuous dynamic loads applied to the roadbed detection points.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] A pneumatic control system for detecting continuous loads on roadbeds includes a dynamic load subsystem and a static load subsystem;

[0006] The dynamic load subsystem includes a first electromagnetic reversing valve, a dynamic load generating cylinder, and a throttle speed control valve;

[0007] The static load subsystem includes a replenishing solenoid valve, a second solenoid directional valve, an exhaust speed control valve, an exhaust solenoid valve, a static load generating cylinder, and a replenishing speed control valve.

[0008] Furthermore, the first electromagnetic reversing valve is connected to an air source via an air pipe, and the first electromagnetic reversing valve is connected to the rodless chamber of the dynamic load generating cylinder via an air pipe; both the rod chamber of the dynamic load generating cylinder and the first electromagnetic reversing valve are connected to the throttle speed control valve via air pipes.

[0009] Furthermore, the feature is that the number of static load subsystems is three.

[0010] Further, the feature is that: the second electromagnetic reversing valve is connected to the air source through an air pipe, and the second electromagnetic reversing valve is connected to the rodless chamber and the rod chamber of the static load generating cylinder through two air pipes respectively; the rodless chamber of the static load generating cylinder is also connected to an exhaust air pipe and a replenishing air pipe, an exhaust speed regulating valve and an exhaust solenoid valve are installed on the exhaust air pipe, a replenishing speed regulating valve and a replenishing solenoid valve are installed on the replenishing air pipe, and the replenishing air pipe is connected to the air source.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] This invention utilizes pneumatic control to enable the cylinder to generate a continuous cyclic dynamic load and a stable, uniformly distributed static load on the roadbed, which is more efficient and environmentally friendly compared with common roadbed detection load generation systems.

[0013] This invention uses alternating energization on both sides of the first electromagnetic reversing valve, and simultaneously controls the cylinder exhaust flow rate by adjusting the speed. The cylinder piston rod extends and retracts at a set frequency to load and release the roadbed, thus generating a continuous dynamic load on the roadbed.

[0014] After applying a static load to the roadbed, this invention slowly exhausts or replenishes air in the rodless chamber of the static load generating cylinder, so that the output force of the three static load generating cylinders, which are evenly distributed in a circle, remains the same, thereby generating a uniform and stable static load on the roadbed. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the aerodynamic principle of the dynamic load subsystem of this utility model.

[0016] Figure 2 This is a schematic diagram of the aerodynamic principle of the static load subsystem of this utility model.

[0017] In the diagram: 11. First solenoid directional valve; 12. Dynamic load generating cylinder; 13. Throttling speed control valve;

[0018] 21. Air replenishment solenoid valve; 22. Second solenoid directional valve; 23. Exhaust speed control valve; 24. Exhaust solenoid valve; 25. Static load generating cylinder; 26. Air replenishment speed control valve. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0020] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0021] In the description of this utility model, 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the term "provided with" should be interpreted broadly. For example, the object "provided with" can be a part of the main body, or it can be separately arranged from the main body and connected to it. This connection can be detachable or non-detachable. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] The present invention will be further described in detail below with reference to the embodiments.

[0024] A specific embodiment of the pneumatic control system for continuous load detection of roadbed provided by this utility model:

[0025] Please see Figure 1-2 The pneumatic control system for continuous load detection of roadbed includes a dynamic load subsystem and a static load subsystem.

[0026] The dynamic load subsystem includes a first electromagnetic reversing valve 11, a dynamic load generating cylinder 12, and a throttle speed control valve 13. The first electromagnetic reversing valve 11 is connected to an air source through an air pipe, and the first electromagnetic reversing valve 11 is connected to the rodless chamber of the dynamic load generating cylinder 12 through an air pipe. The rod chamber of the dynamic load generating cylinder 12 and the first electromagnetic reversing valve 11 are both connected to the throttle speed control valve 13 through air pipes.

[0027] The static load subsystem consists of three sets; each subsystem includes a supplementary air solenoid valve 21, a second solenoid directional valve 22, an exhaust speed control valve 23, an exhaust solenoid valve 24, a static load generating cylinder 25, and a supplementary air speed control valve 26. The second solenoid directional valve 22 is connected to the air source via an air pipe, and is connected to the rodless chamber and the rod chamber of the static load generating cylinder 25 via two air pipes respectively. The rodless chamber of the static load generating cylinder 25 is also connected to an exhaust air pipe and a supplementary air pipe. The exhaust speed control valve 23 and the exhaust solenoid valve 24 are installed on the exhaust air pipe, and the supplementary air speed control valve 26 and the supplementary air solenoid valve 21 are installed on the supplementary air pipe. The supplementary air pipe is connected to the air source.

[0028] In this embodiment, the gas source is a gas storage tank; the first electromagnetic reversing valve 11 and the second electromagnetic reversing valve 22 are both three-position five-way electromagnetic reversing valves; the gas replenishment solenoid valve 21 and the exhaust solenoid valve 24 are both two-position three-way electromagnetic reversing valves.

[0029] Dynamic load subsystems such as Figure 1 As shown, the gas storage tank stores a continuous and stable supply of compressed gas. When one side of the first electromagnetic reversing valve 11 is energized, the rodless chamber of the dynamic load generating cylinder 12 is filled with gas, and the rod chamber is exhausted. The exhaust flow rate of the rod chamber of the dynamic load generating cylinder 12 is adjusted by the throttle speed regulating valve 13, controlling the extension speed of the piston rod. This action outputs a force to the roadbed detection point, causing the roadbed to undergo downward elastic deformation. When the other side of the first electromagnetic reversing valve 11 is energized, both the rodless and rod chambers of the dynamic load generating cylinder 12 are exhausted. The exhaust flow rate is adjusted by the throttle speed regulating valve 13, controlling the retraction speed of the piston rod. This action restores the elastic deformation of the roadbed and simultaneously pushes the piston cylinder of the dynamic load generating cylinder 12 upward. By controlling the alternating energization of both sides of the first electromagnetic reversing valve 11 at a certain frequency, the dynamic load generating cylinder 12 extends and retracts at a set frequency, thereby generating a continuous cyclic dynamic load on the roadbed.

[0030] Static load subsystem such as Figure 2As shown, the gas storage tank stores a continuous and stable compressed gas. The static load includes three load application points that are evenly distributed along the circumference and have the same direction of force. Each load application point has a static load generating cylinder 25, a second electromagnetic reversing valve 22, a gas replenishing solenoid valve 21, a gas replenishing speed regulating valve 26, an exhaust solenoid valve 24, and an exhaust speed regulating valve 23 in its gas path. The second electromagnetic reversing valves 22 at the three load application points are energized simultaneously. The rodless chamber of the static load generating cylinder 25 is filled with gas, and the rod chamber is exhausted. When the three load application points output force simultaneously and the output force is the same, a uniformly distributed static load is generated on the roadbed. When vibration or center of gravity deviation causes the output force of the static load generating cylinder 25 to deviate from the target force during the application of dynamic load, taking a certain load application point as an example, at this time, the static load generating cylinder 25 outputs force, the second solenoid reversing valve 22 is de-energized, when the output force of the static load generating cylinder 25 is greater than the target force, the exhaust solenoid valve 24 is energized, and the exhaust speed control valve 23 controls the air release speed of the rodless chamber of the static load generating cylinder 25. After the rodless chamber slowly releases air, the output force of the static load generating cylinder 25 decreases to the target force, and then the exhaust solenoid valve 24 is de-energized; when the output force of the static load generating cylinder 25 is less than the target force, the replenishment solenoid valve 21 is energized, and the replenishment speed control valve 26 controls the replenishment speed to the rodless chamber of the static load generating cylinder 25. After the rodless chamber slowly replenishes air, the output force of the static load generating cylinder 25 rises to the target force, and then the replenishment solenoid valve 21 is de-energized. Through the aforementioned dynamic exhaust and replenishment process, the rodless chamber of the static load generating cylinder 25 maintains the same force at the three static load application points, thereby generating a stable and uniformly distributed static load on the roadbed. When the other end of the second electromagnetic reversing valve 22 is energized, the rod chamber of the static load generating cylinder 25 is filled with air, the rodless chamber is exhausted, and the piston rod of the static load generating cylinder 25 retracts.

[0031] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A pneumatic control system for detecting continuous loads on roadbeds, characterized in that: Includes dynamic load subsystem and static load subsystem; The dynamic load subsystem includes a first electromagnetic reversing valve (11), a dynamic load generating cylinder (12), and a throttle speed control valve (13). The static load subsystem includes a supplementary air solenoid valve (21), a second solenoid directional valve (22), an exhaust speed control valve (23), an exhaust solenoid valve (24), a static load generating cylinder (25), and a supplementary air speed control valve (26).

2. The pneumatic control system for detecting continuous loads on roadbeds according to claim 1, characterized in that: The first electromagnetic reversing valve (11) is connected to the air source through an air pipe. The first electromagnetic reversing valve (11) is connected to the rodless chamber of the dynamic load generating cylinder (12) through an air pipe. The rod chamber of the dynamic load generating cylinder (12) and the first electromagnetic reversing valve (11) are both connected to the throttle speed regulating valve (13) through air pipes.

3. The pneumatic control system for detecting continuous loads on roadbeds according to claim 1, characterized in that: The number of static load subsystems is three.

4. The pneumatic control system for detecting continuous loads on roadbeds according to claim 1 or 3, characterized in that: The second electromagnetic reversing valve (22) is connected to the air source through an air pipe. The second electromagnetic reversing valve (22) is connected to the rodless chamber and the rod chamber of the static load generating cylinder (25) through two air pipes respectively. The rodless chamber of the static load generating cylinder (25) is also connected to an exhaust air pipe and a replenishment air pipe. An exhaust speed regulating valve (23) and an exhaust solenoid valve (24) are installed on the exhaust air pipe. A replenishment speed regulating valve (26) and a replenishment solenoid valve (21) are installed on the replenishment air pipe. The replenishment air pipe is connected to the air source.

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