Intelligent wall-attached detection device and detection method

Abstract

An intelligent wall-attachment detection device comprises a wall, a tower crane body and a wall-attachment rod, wherein a first connecting ear seat is provided on the wall, a second connecting ear seat is provided on the tower crane body, the first connecting ear seat and the second connecting ear seat are both provided with a pin hole, one end of the wall-attachment rod is hinged to the first connecting ear seat through a force measuring pin, and the other end of the wall-attachment rod is hinged to the second connecting ear seat through a pin; a distance measuring module is provided at one end of the wall-attachment rod close to the first connecting ear seat, and the distance measuring module is used to measure the length of the wall-attachment rod; the distance measuring module and the force measuring pin are respectively electrically connected to a controller, and the controller is connected to a calculation and display module through a wired or wireless communication method, and the calculation and display module calculates the slenderness ratio parameter of the wall-attachment rod and obtains a stability coefficient according to the slenderness ratio parameter. The present invention monitors the change of the load on the wall-attachment rod at all times during the use of the wall-attachment, judges whether the working state of the wall-attachment is safe, and ensures the safety of the tower crane and the safety of personnel.

Description

Technical Field

[0001] The present invention relates to the technical field of wall attachment detection, and in particular to an intelligent wall attachment detection device and a detection method. Background Art

[0002] The wall attachment is a very important device to ensure the safe use of tower cranes. It connects and fixes the tower crane to the outer wall of the building to ensure that the tower crane will not overturn when subjected to external forces during use, thereby ensuring the safety of the building, tower crane and construction. The changes in some states and parameters (such as the slenderness ratio and load of the connecting rods) of the wall attachment during installation and operation are closely related to its normal and safe use. If the changes in the slenderness ratio and load of the connecting rods exceed the allowable range, it will lead to the deterioration of the working conditions and state of the wall attachment, resulting in damage to the wall attachment and the occurrence of tower crane accidents. Therefore, detecting the changes in these parameters of the wall attachment and issuing an alarm and taking measures in a timely manner when the changes exceed the allowable range is an important measure to ensure the safe use of tower cranes.

[0003] The existing technologies mainly include: There is no device for real-time detection of the parameters and status of the wall attachment. Generally, the existing practice is that the wall attachment designer performs some verification calculations on the parameters during the design to ensure that the use of the wall attachment is carried out under safe conditions. However, this method cannot monitor and ensure that the parameters such as load that change during use due to changes in the working conditions of the tower crane exceed the allowable range, which will bring greater safety hazards. Especially when encountering situations such as extremely bad weather, if the working status of the wall attachment is not monitored, when the wall attachment load exceeds the operating range, it is easy for the tower crane to overturn. Such accidents have also occurred and been reported in practice. Summary of the invention

[0004] In order to overcome the above problems, the present invention provides a safe and reliable intelligent wall-attached detection device and detection method.

[0005] The first aspect of the present invention provides an intelligent wall-attachment detection device, comprising a wall, a tower crane body and a wall-attachment rod, wherein the wall is located on one side of the tower crane body, a first connecting ear seat is fixedly connected to the wall, a second connecting ear seat is fixedly connected to the tower crane body, the first connecting ear seat and the second connecting ear seat are both provided with a pin shaft hole, one end of the wall-attachment rod is hinged to the first connecting ear seat through a force measuring pin shaft, and the other end of the wall-attachment rod is hinged to the second connecting ear seat through a pin shaft; a distance measuring module is provided at one end of the wall-attachment rod close to the first connecting ear seat, and the distance measuring module is used to measure the length of the wall-attachment rod;

[0006] The distance measuring module and the force measuring pin are electrically connected to the controller respectively, and the measured length and load information of the wall-attached rod are sent to the controller; the controller is connected to the calculation and display module through wired or wireless communication, and the calculation and display module calculates the slenderness ratio parameters of the wall-attached rod and obtains the stability coefficient according to the slenderness ratio parameters.

[0007] Furthermore, the wireless communication method is WIFI or 4G or Bluetooth.

[0008] Furthermore, the computing and display module is a human-machine interface HMI or a computer.

[0009] Furthermore, the distance measuring module is a laser distance measuring module or an ultrasonic distance measuring module.

[0010] Furthermore, the number of the wall-mounting rods, the first connecting ear seats and the second connecting ear seats are all four, and a distance measuring module is provided on each wall-mounting rod, or a distance measuring module is provided on one of the wall-mounting rods.

[0011] A second aspect of the present invention provides a detection method for an intelligent wall-attached detection device, comprising the following steps:

[0012] Step 1, calculate the slenderness ratio parameters of the wall-attached rod;

[0013] Step 2: According to the slenderness ratio parameter of the wall-attached rod, check the stability coefficient table of the rod of the material used to obtain the stability coefficient.

[0014] Step 3: Compare the calculated slenderness ratio parameter with the allowed slenderness ratio. If the slenderness ratio exceeds the allowed value, an unqualified slenderness ratio message is issued and an alarm is given. If the slenderness ratio fails, the length of the wall-mounted rod can be readjusted during installation, or the wall-mounted structure and material can be reselected and reinstalled until the calculated slenderness ratio parameter is less than or equal to the allowed slenderness ratio.

[0015] Step 4, determine the load type of each wall-attached rod and calculate the stress σ corresponding to each wall-attached rod. There are two types of loads: tension and pressure.

[0016] If the load N is a tensile force, the stress on the wall-attached rod is σ = N / (n*A0);

[0017] If the load N is pressure, then the stress on the wall rod is

[0018] The wall-attached rod adopts a lattice column structure, which includes n limbs and tie bars for connecting the limbs. A0 is the cross-sectional area of ​​the limb material, n is the number of limbs adopted by the lattice column structure, and n≥2;

[0019] Step 5, compare the stress σ calculated by real-time detection of the wall-attached rod with the stress allowed by the system; if the stress calculated in real time is frequently greater than the stress allowed by the system, the system issues a warning message and an alarm.

[0020] Furthermore, the calculation formula of the slenderness ratio parameter in step 1 is,

[0021]

[0022] The wall-attached rod adopts a lattice column structure, which includes n limbs and tie bars for connecting the limbs. n is the number of limbs adopted by the lattice column structure, and n≥2. L is the length of the wall-attached rod, a is the side length of the lattice column section, A0 is the cross-sectional area of ​​the limb material, I0 is the moment of inertia of the limb, Z0 is the distance from the center axis to the outer edge, and A Z is the cross-sectional area of ​​the tie bar; a, A0, I0, and Z0 are obtained according to the structure of the wall and the materials used for the wall rod.

[0023] The beneficial effects of the present invention are: ensuring that the wall attachment is installed according to the slenderness ratio and preload required by the design, ensuring that the wall attachment installation meets the safety requirements; constantly monitoring the changes in the load on the wall attachment during use, judging whether the working state of the wall attachment is safe, and immediately giving an alarm if it exceeds the wall attachment safety condition, so that the operator can take measures in time to ensure the safety of the tower crane and the safety of the personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention. DETAILED DESCRIPTION

[0025] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Refer to the attached Figure 1 , an intelligent wall-attached detection device, comprising a wall 2, a tower crane body 8 and a wall-attached rod 6, wherein the wall 2 is located on one side of the tower crane body 8, a first connecting ear seat is fixedly connected to the wall 2, a second connecting ear seat is fixedly connected to the tower crane body 8, the first connecting ear seat and the second connecting ear seat are both provided with pin holes, one end of the wall-attached rod 6 is hinged to the first connecting ear seat through a force measuring pin 1, and the other end of the wall-attached rod is hinged to the second connecting ear seat through a pin; a distance measuring module is provided at one end of the wall-attached rod 6 close to the first connecting ear seat, the distance measuring module is used to measure the length of the wall-attached rod, and the distance measuring module is a laser distance measuring module or an ultrasonic distance measuring module or a distance measuring module in other ways;

[0029] In this embodiment, the distance measuring module adopts a laser distance measuring module. The two ends of the wall-mounted rod 6 in the length direction to be measured are respectively provided with a laser distance measuring module 5 and a reflector 7. The laser distance measuring module 5 is fixed to one end of the wall-mounted rod 6 close to the force measuring pin 1, and the reflector 7 is fixed to one end of the wall-mounted rod 6 close to the pin. The installation reference plane of the laser distance measuring module 5 is parallel to the axis of the wall-mounted rod 6, and the plane where the reflector 7 is located is perpendicular to the axis of the wall-mounted rod 6. The laser emitted by the laser distance measuring module 5 is reflected by the reflector 7 and then returns to the laser distance measuring module 5.

[0030] There are four first connecting ear seats, four second connecting ear seats, and four wall-mounted rods 6. The four second connecting ear seats are respectively arranged on the outside of the four corners of the tower crane body 8, and the four first connecting ear seats are arranged on the wall 2. Each wall-mounted rod 6 is provided with a set of ranging modules 5 and reflectors 7, and an independent sampling method is adopted. In another embodiment, among the four wall-mounted rods, only one wall-mounted rod is provided with a ranging module 5 and a reflector 7, and a sharing method of four wall-mounted rods is adopted.

[0031] The laser distance measuring module 5 and the force measuring pin are electrically connected to the controller respectively, and the measured length and load information of the wall-attached rod are sent to the controller; the controller is connected to the calculation and display module through wired or wireless communication, and the calculation and display module calculates the slenderness ratio parameters of the wall-attached rod and obtains the stability coefficient according to the slenderness ratio parameters.

[0032] The laser distance measuring module 5 and the force measuring pin 1 are electrically connected to the controller 3 respectively. After the device is powered on and started, the controller 3 automatically detects the length and load of the wall-attaching rod 6; the controller 3 is connected to the calculation and display module 4 via WIFI communication. The calculation and display module 4 is a computer. The calculation and display module 4 calculates the slenderness ratio parameters of each wall-attaching rod 6 according to the length of the wall-attaching rod 6, and judges the working condition of the wall-attaching rod according to the load, slenderness ratio and stability coefficient. If the set system safety conditions are exceeded, the controller 3 will alarm.

[0033] The detection method of the intelligent wall-attached detection device is characterized by comprising the following steps:

[0034] Step 1: Calculate the slenderness ratio parameter of the wall-attached rod. The calculation formula of the slenderness ratio parameter is:

[0035]

[0036] The wall-attached rod adopts a lattice column structure, which includes n limbs and tie bars for connecting the limbs. n is the number of limbs adopted by the lattice column structure, and n≥2. L is the length of the wall-attached rod, a is the side length of the lattice column section, A0 is the cross-sectional area of ​​the limb material, I0 is the moment of inertia of the limb, Z0 is the distance from the center axis to the outer edge, and A Z is the cross-sectional area of ​​the tie rod; a, A0, I0, and Z0 are obtained according to the structure of the wall and the materials used for the wall-attached rod;

[0037] Step 2: According to the slenderness ratio parameter of the wall-attached rod, check the stability coefficient table of the rod of the material used to obtain the stability coefficient.

[0038] Step 3: Compare the calculated slenderness ratio parameter with the allowed slenderness ratio. If the slenderness ratio exceeds the allowed value, an unqualified slenderness ratio message is issued and an alarm is given. If the slenderness ratio fails, the length of the wall-mounted rod can be readjusted during installation, or the wall-mounted structure and material can be reselected and reinstalled until the calculated slenderness ratio parameter is less than or equal to the allowed slenderness ratio.

[0039] Step 4, determine the load type of each wall-attached rod and calculate the stress σ corresponding to each wall-attached rod. There are two types of loads: tension and pressure.

[0040] If the load N is a tensile force, the stress on the wall-attached rod is σ = N / (n*A0);

[0041] If the load N is pressure, then the stress on the wall rod is

[0042] The wall-attached rod adopts a lattice column structure, the lattice column includes n limbs and tie bars for connecting the limbs, the wall-attached rod lattice column structure is commonly a 2-limb, 4-limb, 3-limb structure, A0 is the cross-sectional area of ​​the limb material, n is the number of limbs used by the wall-attached rod, and n≥2;

[0043] Step 5, compare the stress σ calculated by real-time detection of the wall-attached rod with the stress allowed by the system; if the stress calculated in real time is frequently greater than the stress allowed by the system, the system issues a warning message and an alarm.

[0044] The contents described in the embodiments of this specification are merely an enumeration of the implementation forms of the inventive concept. The protection scope of the present invention should not be regarded as limited to the specific forms described in the embodiments. The protection scope of the present invention also extends to equivalent technical means that can be conceived by those skilled in the art based on the inventive concept.

Claims

1. A detection method for an intelligent wall-attached detection device, characterized in that: The intelligent wall-attachment detection device comprises a wall, a tower crane body and a wall-attachment rod, wherein the wall is located on one side of the tower crane body, a first connecting ear seat is fixedly connected to the wall, a second connecting ear seat is fixedly connected to the tower crane body, and the first connecting ear seat and the second connecting ear seat are both provided with a pin shaft hole, characterized in that: one end of the wall-attachment rod is hinged to the first connecting ear seat through a force measuring pin shaft, and the other end of the wall-attachment rod is hinged to the second connecting ear seat through a pin shaft; a distance measuring module is provided at one end of the wall-attachment rod close to the first connecting ear seat, and the distance measuring module is used to measure the length of the wall-attachment rod; The distance measuring module and the force measuring pin are electrically connected to the controller respectively, and the measured length and load information of the wall-attached rod are sent to the controller; the controller is connected to the calculation and display module through wired or wireless communication, and the calculation and display module calculates the slenderness ratio parameter of the wall-attached rod and obtains the stability coefficient according to the slenderness ratio parameter; The detection method includes the following steps: Step 1, calculate the slenderness ratio parameters of the wall-attached rod; Step 2: According to the slenderness ratio parameter of the wall-attached rod, check the stability coefficient table of the rod of the material used to obtain the stability coefficient. ; Step 3: Compare the calculated slenderness ratio parameter with the allowed slenderness ratio. If the slenderness ratio exceeds the allowed value, an unqualified slenderness ratio message is issued and an alarm is given. If the slenderness ratio fails, the length of the wall-mounted rod can be readjusted during installation, or the wall-mounted structure and material can be reselected and reinstalled until the calculated slenderness ratio parameter is less than or equal to the allowed slenderness ratio. Step 4: Determine the load type of each wall-attached rod and calculate the stress corresponding to each wall-attached rod ,There are two types of loads, tension and pressure; If the load N is a tensile force, then the stress on the wall rod is ; If the load N is pressure, the stress on the wall rod is σ = N / (n* ); The wall-attached rod adopts a lattice column structure, which includes n limbs and tie bars for connecting the limbs. is the cross-sectional area of ​​the limb material, n is the number of limbs used in the lattice column structure, and n≥2; Step 5: Real-time detection and calculation of stress on the wall rod Compare it with the stress allowed by the system; if the stress calculated in real time is frequently greater than the stress allowed by the system, the system will issue a warning message and alarm.

2. A detection method for an intelligent wall-attached detection device as claimed in claim 1, characterized in that: The wireless communication method is WIFI, 4G or Bluetooth.

3. A detection method for an intelligent wall-attached detection device as claimed in claim 1, characterized in that: The computing and display module is a human-machine interface HMI or a computer.

4. A detection method for an intelligent wall-attached detection device as claimed in claim 1, characterized in that: The distance measuring module is a laser distance measuring module or an ultrasonic distance measuring module.

5. A detection method for an intelligent wall-attached detection device according to any one of claims 1 to 4, characterized in that: The number of the wall-attaching rods, the first connecting ear seats and the second connecting ear seats are all four, and a distance measuring module is provided on each wall-attaching rod, or a distance measuring module is provided on one of the wall-attaching rods.

6. A detection method for an intelligent wall-attached detection device as claimed in claim 1, characterized in that: The calculation formula for the slenderness ratio parameter in step 1 is, Slenderness ratio of wall rod = , where the wall-attached rod adopts a lattice column structure, the lattice column structure includes n limbs and tie bars for connecting the limbs, n is the number of limbs adopted by the lattice column structure, and n≥2, L is the length of the wall-attached rod, is the side length of the lattice column section, is the cross-sectional area of ​​the limb material, is the moment of inertia of the limb, is the distance from the center axis to the outer edge, is the cross-sectional area of ​​the tie bar; , , , It is obtained according to the structure of the wall and the materials used for the wall-mounted rods.

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