Hoisting equipment temperature detection system for extreme environment

Abstract

The utility model relates to a hoisting equipment temperature detection system for an extreme environment, which belongs to the technical field of crane monitoring and comprises an alarm device, an upper computer and an optical fiber temperature measuring device which are sequentially in signal connection. A temperature sensing optical fiber of the optical fiber temperature measuring device is installed on the surface of a to-be-measured structural member of the crane through a point location fixing piece and a bending maintaining piece which can be connected in a magnetic attraction mode. The hoisting equipment temperature detection system is convenient to disassemble and assemble, and can achieve the effects of installation adaptation and protection.

Description

Technical Field

[0001] The utility model relates to the technical field of crane monitoring, in particular to a temperature detection system for crane equipment used in extreme environments. Background Art

[0002] As is known, the application environment of cranes is complex, involving high temperature, extreme cold and radiation environments. In these environments, the overall reliability of the crane is very high. The reliability of the crane is related to the stress distribution and size of its structural parts, and the stress distribution size is related to the temperature. Therefore, it is necessary to monitor the temperature of the crane structural parts and use it to judge the strength of the crane structural parts. At present, the temperature of crane structural parts is mainly monitored by resistance strain gauges at home and abroad. Its shortcomings are: 1. There are few monitoring points, and the stress changes of the overall structural parts cannot be fully grasped; 2. The bonding process of the resistance strain gauge determines that its service life is short, which is not conducive to online long-term monitoring;

[0003] The optical fiber sensing technology developed in recent years is a new type of sensing technology. Through the reflection, refraction and absorption effects of light, optical Doppler effect, acousto-optic, electro-optic, magneto-optic and elasto-optic effects, etc., the parameters such as the amplitude, phase, polarization state and wavelength of the light wave can be changed directly or indirectly. Therefore, the optical fiber can be used as a sensitive element to detect various physical quantities. For example, the Chinese invention patent with the announcement number CN106895884A discloses a stress and temperature detection system for the main beam of a metallurgical crane, which realizes the detection of stress and temperature by adopting a single optical fiber sensor, sets a specific position on the main beam, determines the monitoring and early warning threshold, and can perform synchronous fault analysis and comprehensive judgment of dual parameters. However, the prior art also does not disclose the installation method of the optical fiber, and the traditional bonding method is not conducive to use in extreme environments. The traditional bracket method requires drilling and installation, which will damage the structural parts and cannot be contacted with temperature sensing. The traditional bundling method is not convenient for disassembly and assembly. More importantly, these traditional installation methods cannot protect the optical fiber from bending. Utility Model Content

[0004] In order to overcome the deficiencies in the background technology and solve the existing technical problems, the utility model discloses a temperature detection system for lifting equipment used in extreme environments, which is easy to disassemble and assemble and can achieve installation adaptation and protection effects.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A temperature detection system for lifting equipment in extreme environments comprises an alarm device, a host computer and an optical fiber temperature measuring device, wherein the alarm device, the host computer and the optical fiber temperature measuring device are connected in sequence by signals, and the temperature sensing optical fiber of the optical fiber temperature measuring device is installed on the surface of a structure to be tested of the crane through a point fixing part and a bending retaining part that can be connected by magnetic attraction.

[0007] Furthermore, the point fixing member includes a U-shaped clamping plate correspondingly clamped outside the temperature sensing optical fiber, and first magnets are fixed to both ends of the U-shaped clamping plate.

[0008] Furthermore, the U-shaped clamping plate is composed of a flat plate and two vertical plates symmetrically fixed at the two ends of the flat plate at the top, the first magnet is embedded in the center of the bottom end surface of the vertical plate, a pressure plate is provided between the two vertical plates, a through hole is provided in the center of the plate surface of the flat plate, a guide rod is movably inserted in the through hole, the inner end of the guide rod is fixed to the pressure plate, and a compression spring is provided on the guide rod body between the pressure plate and the flat plate.

[0009] Furthermore, the guide rod is configured as a threaded rod with a nut at the outer end, and a thermally conductive buffer pad is connected between the bottom ends of the two vertical plates.

[0010] Furthermore, the thermally conductive buffer pad is made of a graphite-based composite material, a thermally conductive silica gel or an aluminum-silicon composite material.

[0011] Furthermore, the bending retaining member includes a wheel frame and a guide wheel installed on the wheel frame, the wheel surface of the guide wheel is provided with an annular groove adapted to the temperature sensing optical fiber, and a second magnet is fixed to the outer frame surface of the wheel frame corresponding to the end face of the guide wheel.

[0012] Furthermore, the optical fiber temperature measuring device is configured as a DTS temperature measuring device.

[0013] Furthermore, there are a plurality of point fixing members, and the interval between two adjacent point fixing members is 1 to 3 meters, and bending retaining members are installed at locations where the bending angle of the temperature sensing optical fiber is greater than 90 degrees.

[0014] Due to the adoption of the above-mentioned technical solution, the utility model has the following beneficial effects:

[0015] The temperature detection system for lifting equipment in extreme environments disclosed by the utility model can utilize the magnetic connection of point fixing parts and bending retaining parts on the crane structure to be tested to achieve the effects of avoiding damage to the structure, adapting to extreme installation environments and being detachable. The temperature of the crane structure is measured by contact with the temperature sensing optical fiber of the optical fiber temperature measuring device, and the temperature information is fed back to the host computer and the alarm device for monitoring and alarming. At the same time, the bending retaining parts can be used to prevent the temperature sensing optical fiber from being excessively bent, thereby avoiding failure of optical fiber detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the implementation structure of the utility model;

[0017] Figure 2 is a schematic cross-sectional structural diagram of the point fixing member;

[0018] Figure 3Schematic diagram of the structure of the bending retainer.

[0019] In the figure: 1. alarm device; 2. host computer; 3. optical fiber temperature measuring device; 4. temperature sensing optical fiber; 5. structure to be measured; 6. point fixing part; 601. flat plate; 602. vertical plate; 603. first magnet; 604. pressure plate; 605. guide rod; 606. compression spring; 607. thermal conductive buffer pad; 608. nut; 7. bending retainer; 701. wheel frame; 702. guide wheel; 703. second magnet. DETAILED DESCRIPTION

[0020] The technical solution of the present invention will be described below in conjunction with the drawings in the embodiments of the present invention. In the description, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right" and the like indicating directions or positional relationships, they are only corresponding to the drawings of the present invention, for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction: Embodiment 1:

[0021] Combined with Figure 1-3 The temperature detection system for lifting equipment in extreme environments comprises an alarm device 1, a host computer 2 and an optical fiber temperature measuring device 3. The alarm device 1, the host computer 2 and the optical fiber temperature measuring device 3 are connected in sequence by signals. The optical fiber temperature measuring device 3 is set as a DTS temperature measuring device. The DTS temperature measuring device is based on the optical time domain reflection principle of the optical fiber and the Raman scattering effect of the optical fiber. The laser pulse interacts with the optical fiber molecules to produce various scatterings, such as Rayleigh scattering, Brillouin scattering and Raman scattering, etc. Raman scattering is due to the thermal vibration of the optical fiber molecules, which will produce a light longer than the wavelength of the light source - Stokes light and a light shorter than the wavelength of the light source - Anti-Stokes light. The optical fiber is modulated by the external temperature to change the intensity of the anti-Stokes light in the optical fiber. The ratio of Anti-Stokes to Stokes provides an absolute indication of the temperature. This principle is used to achieve distributed measurement of the temperature field along the optical fiber.

[0022] The temperature sensing optical fiber 4 of the optical fiber temperature measuring device 3 is installed on the surface of the structure 5 to be tested of the crane through a point fixing part 6 and a bending retaining part 7 that can be connected by magnetic attraction. Generally, there are multiple point fixing parts 6, and the distance between two adjacent point fixing parts 6 is 1 to 3 meters. At important detection points, point fixing parts 6 need to be installed. If the important detection points are far apart, point fixing parts 6 are also installed between them to ensure that the temperature sensing optical fiber 4 can be close to the surface of the structure 5 to be tested of the crane to conduct the detection temperature. The bending retaining part 7 is installed at the bending angle of the temperature sensing optical fiber 4 greater than 90 degrees. The temperature sensing optical fiber 4 must bypass the bending retaining part 7 and then Bend again; as needed, the point fixing part 6 includes a U-shaped card plate corresponding to the outside of the temperature sensing optical fiber 4, and the first magnets 603 are fixed at both ends of the U-shaped card plate. The bending retaining part 7 includes a wheel frame 701 and a guide wheel 702 installed on the wheel frame 701. The wheel surface of the guide wheel 702 is provided with a ring groove adapted to the temperature sensing optical fiber 4, and a second magnet 703 is fixed on the outer frame surface of the wheel frame 701 corresponding to the end face of the guide wheel 702. The U-shaped card plate and the guide wheel 702 are magnetically installed on the surface of the crane structure 5 to be tested by the first magnet 603 and the second magnet 703 respectively, and the temperature sensing optical fiber 4 passes through the U-shaped card plate and bypasses the guide wheel 702 for installation.

[0023] In implementing the temperature detection system for lifting equipment in extreme environments of the utility model, after the temperature sensing optical fiber 4 is pressed onto the surface of the structure 5 to be measured by the point fixing part 6, and the bending retaining part 7 is provided at the bending part of the temperature sensing optical fiber 4, the optical fiber temperature measuring device 3 can obtain temperature information through the temperature sensing optical fiber 4 arranged on the crane, and then send the temperature information to the host computer 2 through the TCP / IP network. The host computer 2 compares the temperature signal transmitted by the optical fiber temperature measuring device 3 with the set temperature threshold, and sends it to the alarm device 1 according to the comparison result. The alarm device 1 sends an audible and visual alarm signal to remind the staff. Embodiment 2:

[0024] On the basis of the first embodiment, the U-shaped card plate is composed of a flat plate 601 and two vertical plates 602 symmetrically fixed at the top ends of the flat plate 601. The first magnet 603 is embedded in the center of the bottom end surface of the vertical plate 602. A pressure plate 604 is provided between the two vertical plates 602. A through hole is provided in the center of the plate surface of the flat plate 601. A guide rod 605 is movably inserted in the through hole. The inner end of the guide rod 605 is fixed to the pressure plate 604. The guide rod 605 located between the pressure plate 604 and the flat plate 601 is sleeved with a compression spring 606. The compression spring 606 contacts the pressure plate 604, so that the temperature sensing optical fiber 4 can be pressed by the pressure plate to be close to the surface of the crane structure 5 to be tested. If the surface of the crane structure 5 to be tested needs to be adjusted, it is only necessary to pull the guide rod 6 outward. 05, so that the pressure plate 604 is separated from the temperature sensing optical fiber 4. The pressure plate 604 can be made of an elastic and soft material to avoid crushing the temperature sensing optical fiber 4. At the same time, a wear-resistant structure is set on the surface and the roughness is increased to prevent the temperature sensing optical fiber 4 from excessive sliding. According to needs, the guide rod 605 is set as a threaded rod with a nut 608 at the outer end. By screwing the nut 608, the nut 608 is in contact with the flat plate 601, and the distance between the pressure plate 604 and the flat plate 601 can be changed and adjusted, thereby adjusting the pressing force of the pressure plate 604 on the temperature sensing optical fiber 4. A thermal conductive buffer pad 607 is connected between the bottom ends of the two vertical plates 602 for heat conduction and pressure buffering. Specifically, the thermal conductive buffer pad 607 is set to a graphite-based composite material, thermal conductive silicone or aluminum-silicon composite material.

[0025] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the above-mentioned embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the attached claims rather than the above description. Therefore, it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present invention, and any figure marks in the claims should not be regarded as limiting the content of the claims involved.

Claims

1. A lifting equipment temperature detection system for extreme environments, characterized by: The device comprises an alarm device (1), a host computer (2) and an optical fiber temperature measuring device (3), wherein the alarm device (1), the host computer (2) and the optical fiber temperature measuring device (3) are connected in sequence by signals, and a temperature sensing optical fiber (4) of the optical fiber temperature measuring device (3) is installed on the surface of a structure to be measured (5) of a crane via a point fixing member (6) and a bending retaining member (7) capable of being connected by magnetic attraction.

2. The temperature detection system for lifting equipment in extreme environments according to claim 1 is characterized in that: The point fixing member (6) comprises a U-shaped clamping plate correspondingly clamped outside the temperature sensing optical fiber (4), and first magnets (603) are fixed to both ends of the U-shaped clamping plate.

3. The temperature detection system for lifting equipment in extreme environments according to claim 2 is characterized in that: The U-shaped clamping plate is composed of a flat plate (601) and two vertical plates (602) whose top ends are symmetrically fixed to the two ends of the flat plate (601); the first magnet (603) is embedded in the center of the bottom end surface of the vertical plate (602); a pressing plate (604) is provided between the two vertical plates (602); a through hole is provided in the center of the plate surface of the flat plate (601); a guide rod (605) is movably inserted in the through hole; the inner end of the guide rod (605) is fixed to the pressing plate (604); and a compression spring (606) is sleeved on the rod body of the guide rod (605) located between the pressing plate (604) and the flat plate (601).

4. The temperature detection system for lifting equipment in extreme environments according to claim 3 is characterized in that: The guide rod (605) is a threaded rod with a nut (608) at the outer end, and a heat-conducting buffer pad (607) is connected between the bottom ends of the two vertical plates (602).

5. The temperature detection system for lifting equipment in extreme environments according to claim 4 is characterized in that: The thermally conductive buffer pad (607) is made of a graphite-based composite material, a thermally conductive silica gel or an aluminum-silicon composite material.

6. The temperature detection system for lifting equipment in extreme environments according to claim 1 is characterized in that: The bending retaining member (7) comprises a wheel frame (701) and a guide wheel (702) mounted on the wheel frame (701); a wheel surface of the guide wheel (702) is provided with an annular groove adapted to fit the temperature sensing optical fiber (4); and a second magnet (703) is fixed to an outer frame surface of the wheel frame (701) corresponding to an end surface of the guide wheel (702).

7. The temperature detection system for lifting equipment in extreme environments according to claim 1 is characterized in that: The optical fiber temperature measuring device (3) is configured as a DTS temperature measuring device.

8. The temperature detection system for lifting equipment in extreme environments according to claim 1 is characterized in that: A plurality of point fixing members (6) are provided, and the distance between two adjacent point fixing members (6) is 1 to 3 meters. A bending retaining member (7) is installed at each position where the bending angle of the temperature sensing optical fiber (4) is greater than 90 degrees.

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