Automatic monitoring and compensating device for axial force of steel support

Abstract

The utility model discloses an automatic monitoring and compensating device for axial force of a steel support, which relates to the technical field of pressure monitoring and comprises a support shaft, a first adjustable head and a second adjustable head are respectively fixed at two ends of the support shaft, an axial force meter is mounted on the first adjustable head through a fixing component, and the fixing component comprises a positioning unit, a first adjusting unit and a second adjusting unit. The positioning device is arranged on the outer side of the first movable head and comprises a plurality of sets of sleeves fixedly installed on the outer wall of the first movable head, positioning insertion rods penetrating through the outer wall of the first movable head are installed in the sleeves in a sealed and sliding mode, springs are connected between the inner walls of the sleeves and the positioning insertion rods, and connecting pipes are connected between the adjacent sleeves in a communicating mode; and the pushing and pressing unit is arranged on the outer side of the first movable head and used for continuously injecting pressure liquid into the inner cavity of the sleeve and the inner cavity of the connecting pipe, and the problems that most of existing axial force meters are fixedly installed in a surrounding mode through multiple sets of bolts, related workers need to use tools to disassemble and assemble the axial force meters one by one during specific installation and disassembly, and time and labor are wasted are solved.

Description

Technical Field

[0001] This utility model relates to the field of pressure monitoring technology, specifically to an automatic monitoring and compensation device for axial force of steel support. Background Technology

[0002] Steel supports, as crucial support components in foundation pit engineering, are widely used in subway, underground space, and deep foundation pit construction. They maintain the stability of the foundation pit structure by withstanding soil and water pressure. During construction, due to factors such as dynamic changes in the soil, fluctuations in surrounding loads, and relaxation of the support materials, the axial force of the steel supports gradually decreases. If not monitored and compensated in a timely manner, this may lead to foundation pit deformation or even collapse, threatening construction safety and surrounding structures. Traditional methods rely on manual monitoring and manual axial force reapplying, but these are inefficient and have slow response times, making it difficult to meet the real-time and accuracy requirements under complex geological conditions.

[0003] The reference patent is titled "A Steel Support Axial Force Compensation and Monitoring Device" (Publication No. CN221224051U, Publication Date: 2024-06-25). After adjusting the hydraulic electric jack to ensure the steel support provides adequate support for the underground continuous wall, the threaded rod is rotated, and the jack acts on the axial force gauge. An initial pressure value is set, and the axial force gauge monitors the axial force of the steel support in real time. If a lack of axial force is detected, the hydraulic electric jack automatically applies pressure to supplement the axial force. The signal transmitter sends the pressure information to a mobile phone for real-time observation of the axial force data.

[0004] Based on the above patent, most existing axial force gauges are installed using a multi-group bolt ring-type fixing method. During the specific installation and disassembly, relevant personnel need to use tools to disassemble and assemble each one, which is time-consuming and labor-intensive. Therefore, this utility model provides an automatic monitoring and compensation device for steel support axial force. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides an automatic monitoring and compensation device for axial force of steel supports. It solves the problem that most existing axial force gauges are installed using multiple sets of bolts for ring-type fixing, which requires relevant personnel to use tools to disassemble and reassemble each one during installation and disassembly, which is time-consuming and labor-intensive.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an automatic monitoring and compensation device for axial force of a steel support, comprising a support shaft, with a first movable head and a second movable head fixed at both ends of the support shaft respectively. An axial force gauge is mounted on the first movable head via a fixing assembly, the fixing assembly comprising:

[0007] The positioning unit is located on the outside of the first movable head and includes several sets of sleeves fixedly installed on the outer wall of the first movable head. A positioning rod that penetrates the outer wall of the first movable head is slidably installed inside the sleeve. A spring is connected between the inner wall of the sleeve and the positioning rod, and a connecting pipe is connected between adjacent sleeves.

[0008] The pressing unit is located outside the first movable head and is used to continuously inject pressurized fluid into the inner cavity of the sleeve and connecting pipe.

[0009] Preferably, the pushing unit includes a liquid storage cylinder fixed to the outer wall of the first movable head, and the top of the liquid storage cylinder is provided with a liquid injection port, and a liquid injection plug is plugged into the liquid injection port.

[0010] Preferably, one end of the liquid storage cylinder is designed to be open, and a portal rod is fixed to the outer wall of the open end, with a threaded screw rod threaded onto the portal rod.

[0011] Preferably, the threaded rod extends to the inner end of the liquid storage cylinder and is fixed with a compression plate, and the liquid storage cylinder and a set of sleeves are interconnected by a liquid guide pipe.

[0012] Preferably, a first mounting plate is welded to the outer end of the second activator, a hydraulic jack is fixed to the other side of the first mounting plate, and a second mounting plate is fixed to the end of the hydraulic jack away from the first mounting plate.

[0013] Preferably, the axial force gauge has the same number of mounting holes as the positioning rod on its outer side, so that the positioning rod can be inserted into the mounting holes to fix the axial force gauge to the first movable head.

[0014] Beneficial effects

[0015] This invention provides an automatic monitoring and compensation device for axial force on steel supports. Compared with the prior art, it has the following advantages:

[0016] 1. This automatic axial force monitoring and compensation device for steel supports rotates a threaded rod on a portal frame, causing a pressure plate to move away from the threaded rod inside the storage tank. The pressure plate pushes the pressurized fluid inside the storage tank, which then flows through a guide pipe into the sleeve and connecting pipe. The pressure of the fluid acts on the positioning rod, overcoming the spring force and allowing it to be further inserted into the mounting hole of the axial force gauge, thus more securely fixing the axial force gauge to the first movable head. This design eliminates the need for personnel to disassemble and assemble each component individually with tools, saving time and effort.

[0017] 2. This automatic monitoring and compensation device for the axial force of the steel support utilizes a positioning rod, driven by a spring, to initially insert into the mounting hole of the axial force gauge for initial fixation. Then, by rotating the threaded rod, the extrusion plate is pushed, allowing pressurized fluid to enter the inner cavity of the sleeve and connecting pipe, overcoming the spring force and allowing the positioning rod to further insert into the mounting hole for a more secure fixation. This step-by-step and adjustable reinforcement method, compared to traditional fixing methods, improves the stability of the axial force gauge installation and effectively prevents the axial force gauge from loosening or shifting due to vibration, external impact, or other factors. This ensures that the axial force gauge continuously and accurately monitors the axial force of the support shaft, improving the reliability and stability of the monitoring data. Attached Figure Description

[0018] Figure 1 This is a three-dimensional appearance schematic diagram of the present utility model;

[0019] Figure 2 This is a schematic diagram of the fixing component of this utility model;

[0020] Figure 3 This is a cross-sectional schematic diagram of the positioning unit of this utility model;

[0021] Figure 4 This is a schematic diagram of the pushing unit of this utility model;

[0022] Figure 5 This is a schematic diagram of the axial force gauge of this utility model.

[0023] In the diagram: 1-Support shaft, 2-First hinge head, 3-Axis force gauge, 4-Fixing component, 41-Positioning unit, 411-Sleeve, 412-Positioning rod, 413-Spring, 414-Connecting pipe, 42-Pushing unit, 421-Liquid storage cylinder, 422-Injection plug, 423-Gantry rod, 424-Threaded rod, 425-Extrusion plate, 426-Liquid guide tube, 5-Second hinge head, 6-First mounting plate, 7-Hydraulic jack, 8-Second mounting plate, 9-Mounting hole. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-5 This utility model provides a technical solution: an automatic monitoring and compensation device for axial force of steel supports, specifically including the following embodiments:

[0026] Example 1: An automatic monitoring and compensation device for axial force of a steel support includes a support shaft 1. A first movable head 2 and a second movable head 5 are fixed to both ends of the support shaft 1. An axial force gauge 3 is mounted on the first movable head 2 via a fixing assembly 4. The fixing assembly 4 includes a positioning unit 41 disposed on the outside of the first movable head 2, comprising several sets of sleeves 411 fixedly installed on the outer wall of the first movable head 2. A positioning rod 412 penetrating the outer wall of the first movable head 2 is slidably installed inside the sleeves 411. A connection is established between the inner wall of the sleeves 411 and the positioning rod 412. A spring 413 is used, and a connecting pipe 414 is used to connect adjacent sleeves 411. A pushing unit 42 is located outside the first movable head 2 and is used to continuously inject pressurized fluid into the inner cavity of the sleeves 411 and the connecting pipe 414. By rotating the threaded rod 424, it rotates threadedly on the portal rod 423, driving the extrusion plate 425 to move away from the threaded rod 424 inside the liquid storage cylinder 421. The extrusion plate 425 pushes the pressurized fluid in the liquid storage cylinder 421, and the pressurized fluid enters the inner cavity of the sleeves 411 and the connecting pipe 414 through the liquid guide pipe 426. The pressure of the pressurized fluid acts on the positioning rod 412, overcoming the elastic force of the spring 413, so that the positioning rod 412 is further inserted into the mounting hole 9 of the axial force gauge 3.

[0027] Example 2: The main difference between this example and the first technical solution is that: an automatic monitoring and compensation device for axial force of a steel support, the pushing unit 42 includes a liquid storage cylinder 421 fixed to the outer wall of the first movable head 2, and the top of the liquid storage cylinder 421 is provided with a liquid injection port, and a liquid injection plug 422 is plugged into the liquid injection port. One end of the liquid storage cylinder 421 is designed as an open type, and a gate-shaped rod 423 is fixed to the outer wall of the open end. A threaded rod 424 is threaded onto the gate-shaped rod 423. The threaded rod 424 extends to the inner end of the liquid storage cylinder 421 and is fixed with a compression plate 425. A liquid guide pipe 426 is interconnected between the liquid storage cylinder 421 and a set of sleeves 411. A first mounting plate 6 is welded to the outer end of the second movable head 5. A hydraulic jack 7 is fixed to the other side of the first mounting plate 6, and a second mounting plate 8 is fixed to the end of the hydraulic jack 7 away from the first mounting plate 6. The axial force gauge 3 has the same number of mounting holes 9 as the positioning rod 412 on its outer side, so that the positioning rod 412 can be inserted into the mounting holes 9 to fix the axial force gauge 3 to the first movable head 2. After the device is installed, the axial force gauge 3 starts to monitor the axial force of the support shaft 1 in real time. When the axial force gauge 3 detects a change in the axial force of the support shaft 1 and compensation is required, the hydraulic jack 7 is activated. The hydraulic jack 7 pushes the second mounting plate 8 by extension and retraction, thereby adjusting and compensating the axial force of the support shaft 1 to maintain the stable working state of the support shaft 1.

[0028] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0029] During operation, the axial force gauge 3 is first placed in the predetermined installation position of the first movable head 2. The positioning rod 412 extends outward under the action of the spring 413 and is inserted into the mounting hole 9 of the axial force gauge 3, thus initially fixing the axial force gauge 3 onto the first movable head 2. After the positioning rod 412 is initially inserted into the mounting hole 9 under the action of the spring 413, the threaded screw rod 424 is rotated, causing it to rotate threadedly on the portal rod 423. This drives the extrusion plate 425 to move away from the threaded screw rod 424 inside the liquid storage cylinder 421. The extrusion plate 425 pushes the pressurized liquid inside the liquid storage cylinder 421, and the pressurized liquid enters the sleeve 411 and the inner cavity of the connecting pipe 414 through the liquid guide pipe 426. The pressure of the pressurized liquid acts on the positioning rod 412, overcoming the elastic force of the spring 413, allowing the positioning rod 412 to be further inserted into the mounting hole 9 of the axial force gauge 3, thus more firmly fixing the axial force gauge 3 onto the first movable head 2.

[0030] The first adjustable head 2 and the second adjustable head 5 are fixed to both ends of the support shaft 1, respectively. The outer end of the second adjustable head 5 is welded with a first mounting plate 6. A hydraulic jack 7 is fixed to the other side of the first mounting plate 6. A second mounting plate 8 is fixed to the end of the hydraulic jack 7 away from the first mounting plate 6. After the device is installed, the axial force gauge 3 starts to monitor the axial force of the support shaft 1 in real time. When the axial force gauge 3 detects a change in the axial force of the support shaft 1 and compensation is required, the hydraulic jack 7 is activated. The hydraulic jack 7 pushes the second mounting plate 8 by extension and retraction, thereby adjusting and compensating the axial force of the support shaft 1 to maintain the stable working state of the support shaft 1. Throughout the process, the axial force gauge 3 continuously monitors the axial force to provide data support for possible subsequent compensation operations.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only 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.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A steel support axial force automatic monitoring compensation device, comprising a support shaft (1), the first loose joint (2) and the second loose joint (5) are respectively fixed at both ends of the support shaft (1), characterized in that: The first adjustable head (2) is provided with an axial force meter (3) through a fixing assembly (4), and the fixing assembly (4) comprises: A positioning unit (41) is arranged outside the first adjustable head (2) and comprises a plurality of groups of sleeves (411) fixedly installed on the outer wall of the first adjustable head (2), and a positioning plug rod (412) penetrating through the outer wall of the first adjustable head (2) is sealingly and slidably installed in the sleeve (411); a spring (413) is connected between the inner wall of the sleeve (411) and the positioning plug rod (412); and the adjacent sleeves (411) are interconnected by a connecting pipe (414). A pushing unit (42) is arranged outside the first adjustable head (2) and is used for continuously injecting pressure liquid into the inner cavities of the sleeves (411) and the connecting pipe (414).

2. The steel support axial force automatic monitoring compensation device according to claim 1, characterized in that: The pushing unit (42) comprises a liquid storage cylinder (421) fixed to the outer wall of the first adjustable head (2), and the liquid storage cylinder (421) is provided with a liquid injection opening at the top, and a liquid injection plug (422) is inserted into the liquid injection opening.

3. The steel support axial force automatic monitoring compensation device according to claim 2, characterized in that: One end of the liquid storage cylinder (421) is designed as an open type, and a door-shaped rod (423) is fixed to the outer wall of the open end; and a threaded rotating rod (424) is threadedly connected to the door-shaped rod (423).

4. The steel support axial force automatic monitoring compensation device according to claim 3, characterized in that: The threaded rotating rod (424) extends to the inner end of the liquid storage cylinder (421) and is fixed with an extrusion piece (425); and a liquid guide pipe (426) is interconnected between the liquid storage cylinder (421) and a group of sleeves (411).

5. The steel support axial force automatic monitoring compensation device according to claim 1, characterized in that: A first mounting plate (6) is welded to the outer side end of the second adjustable head (5), a hydraulic jack (7) is fixed to the other side of the first mounting plate (6), and the hydraulic jack (7) is fixed with a second mounting plate (8) at the end away from the first mounting plate (6).

6. The automatic monitoring and compensating device for steel support axial force according to claim 1, characterized in that: The outer side of the axial force meter (3) is provided with a number of mounting holes (9) equal to the number of the positioning plug rods (412), so that the positioning plug rods (412) can be inserted into the mounting holes (9) to fix the axial force meter (3) on the first adjustable head (2).

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