Supporting device and supporting method of fiber grating transceiver for stress-strain detection

Abstract

The invention provides a supporting device and a supporting method of a fiber bragg grating transceiver for stress-strain detection, and relates to the technical field of boiler heating surface measurement. The supporting device comprises a plurality of supporting assemblies which are arranged on the heating surface of the boiler water cooling pipe and used for supporting the fiber grating sensor; the protection assemblies are in one-to-one correspondence with the supporting assemblies, are arranged on the heating surface of the boiler water cooling pipe, are positioned above the corresponding supporting assemblies, and are used for limiting the radial movement range of the fiber grating sensor; the emission supporting piece is arranged outside the boiler and used for supporting the light source emitter and tensioning or loosening the fiber bragg grating sensor; and the receiving support frame is arranged outside the boiler and is used for supporting the receiving terminal. According to the supporting device and the supporting method of the fiber bragg grating transceiver for stress-strain detection, the problem that the stress and the strain of a plurality of monitoring points in the heating surface of a boiler cannot be monitored by using a fiber bragg grating sensor in the prior art is solved, and the measuring efficiency of the strain and the stress of the heating surface of a boiler water cooling pipe is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of boiler heating surface measurement, and in particular to a supporting device and a supporting method of a fiber optic grating transceiver for stress and strain detection. Background Art

[0002] Strain refers to the relative deformation of a local object under the influence of external forces and non-uniform temperature fields; stress refers to the internal force that interacts between the various parts of an object when it is deformed due to external factors (force, humidity, changes in temperature field, etc.) to resist the effects of such external factors and attempt to restore the object from its deformed position to its pre-deformation position; strain can be considered as the relative deformation rate of an object after it is subjected to stress.

[0003] The boiler heating surface generally refers to the water-cooled wall laid on the furnace wall around the boiler furnace; it has the functions of enhancing heat transfer, saving metal consumption, preventing slagging on the furnace wall, and improving the mechanical strength of the furnace wall.

[0004] Boilers are subjected to alternating mechanical and thermal stresses during startup and load changes. In some stress concentration areas, the stress level may reach or exceed the yield limit of the material, causing fatigue damage to the boiler. Common strain sensors include strain gauges, extensometers, etc., among which strain gauge testing technology has a long history and is widely used. Strain gauges are mainly connected to the structure under test by pasting, welding, and spraying. Extensometers usually use a clamping method to test the deformation of the object under test, and monitor the structural strain by mechanically amplifying or converting the strain into an electrical signal. This type of strain sensor has the advantages of simple structure and easy use, but has disadvantages such as thermal hysteresis under high temperature conditions.

[0005] At present, fiber grating sensors are still used to monitor the stress and strain of the object to be measured. However, the heat load of a large-capacity boiler is unevenly distributed along the perimeter of the furnace. The heat load is the largest near the burner area, and the four corners and the lower part of the furnace are the weakest heated. Therefore, when measuring the stress and strain of the water-cooled wall, it is often necessary to set up multiple measuring points. At present, there is no device that uses fiber grating sensors to set up multiple measuring points in the boiler to monitor the stress and strain of the boiler heating surface. Therefore, a device is urgently needed to solve at least one of the above problems. Summary of the invention

[0006] The purpose of the embodiments of the present invention is to provide a supporting device and a supporting method for a fiber Bragg grating transceiver for stress and strain detection, so as to solve the problem in the prior art that a fiber Bragg grating sensor cannot be used to monitor stress and strain at multiple monitoring points in a boiler heating surface.

[0007] The purpose of the embodiment of the present invention is to provide a support device for a fiber Bragg grating transceiver for stress and strain detection, wherein the fiber Bragg grating transceiver includes a light source transmitter, a fiber Bragg grating sensor and a receiving terminal, and the support device includes: A plurality of support components, arranged on the heating surface of the boiler water cooling tube, for supporting the fiber grating sensor; A protective component corresponding to each supporting component is arranged on the heating surface of the boiler water cooling tube and is located above the corresponding supporting component. The protective component is used to protect the optical fiber Bragg grating on the optical fiber Bragg grating sensor from direct contact with the hot air in the boiler; An emission support member, disposed outside the boiler, for supporting the light source emitter and tightening or loosening the fiber grating sensor; The receiving support frame is arranged outside the boiler and is used to support the receiving terminal.

[0008] Specifically, the support assembly includes: a card plate and a support; The card plate is arranged on the heating surface of the boiler water cooling tube, and a support is connected to the card plate correspondingly, and the fiber grating sensor is supported by the support.

[0009] Specifically, the card plate includes: a first card plate portion, a second card plate portion and a connecting rod portion; One end of the connecting rod is fixed to the first clamping plate, and the other end is movably connected to the second clamping plate. Both the first clamping plate and the second clamping plate have an arc surface that matches the shape of the outer wall of the boiler water-cooling tube, and are fixed to the outer wall of the boiler water-cooling tube through the arc surface.

[0010] Specifically, the clamping plate further includes: a connecting spring, which is sleeved on the connecting rod portion.

[0011] Specifically, the support includes: a base portion, a first clamping column, a second clamping column and a cap; The base part is fixed to the second clamping plate part, a blind hole is opened on the base part, and a first wire passing through hole is arranged on the hole wall of the blind hole; The first clamping column and the second clamping column are both movably arranged in the blind hole, and the second clamping column is located above the first clamping column, a first arc groove is provided on a surface of the first clamping column in contact with the second clamping column, and a second arc groove is provided on a surface of the second clamping column in contact with the first clamping column, the first arc groove and the second arc groove enclose a second wire-passing through hole, and the second wire-passing through hole is coaxial with the first wire-passing through hole; The cap is screwed onto one end of the base portion with a blind hole, and the cap tightens or loosens the abutment between the first clamping column and the second clamping column by rotation, wherein the fiber grating sensor is supported by passing through the first wire through hole and the second wire through hole.

[0012] Specifically, each support seat also includes a limit rod; The limiting rod is used to limit the movement of the first clamping column in the blind hole.

[0013] Specifically, the protection assembly includes: a plurality of splicing blocks, a plurality of connecting columns and a protection cover plate; A plurality of splicing blocks are arranged on the heating surface of the boiler water-cooling pipe and are located above the corresponding support assembly card plate. Two adjacent splicing blocks are connected by connecting columns. A plurality of splicing blocks are connected by connecting columns to form a protective frame. A sink is formed on the side of the protective frame away from the heating surface of the boiler water-cooling pipe. Two opposite groove walls of the sink are provided with corresponding wire-passing grooves. The fiber optic Bragg grating sensor is arranged to pass through the two wire-passing grooves in sequence. The protective cover is movably arranged at the notch of the sink, and has a covering state of covering the sink and an opening state of exposing the sink. The radial movement range of the fiber optic Bragg grating sensor is limited by the protective cover, the sink and the wire-passing groove.

[0014] Specifically, a surface of each splicing block fixed to the heating surface of the boiler water-cooling tube is an arc-shaped surface that matches the shape of the outer wall of the boiler water-cooling tube.

[0015] Specifically, each protection component further includes: a temporary fixing member, which is used to temporarily fix the protection cover plate when the protection cover plate is in a closed state.

[0016] Specifically, the support device further includes: a guide connection piece corresponding to each of the protection components; Each guide connecting member comprises a guide assembly and a guide connecting rod. The guide assembly is connected to the corresponding protection assembly through the guide connecting rod. The guide assembly is used to guide the direction of the fiber grating sensor in the boiler.

[0017] Specifically, the guide assembly includes a hollow spherical rotating seat, a rotating connecting sleeve, a guide cylinder and a pair of guide clamps; The rotating connection sleeve, the guide cylinder and the guide connection rod are all provided with through holes, and the rotating seat is provided with a pair of through holes; The rotating connecting sleeve is connected to the corresponding guide connecting rod and one of the guide clips, and the other guide clip is connected to the guide cylinder; Two arc guide rails are arranged on the spherical surface of the rotating seat, and the two arc guide rails are perpendicular to each other. A pair of guide clamps slide on the corresponding arc guide rails respectively. The fiber grating sensor can pass through the through hole of the guide cylinder, the pair of through holes of the rotating seat, the through hole of the rotating connecting sleeve and the through hole of the guide connecting rod in sequence. The guide clamp slides on the arc guide rail to guide the direction of the fiber grating sensor.

[0018] Specifically, the launch support comprises: a support frame, a launcher mounting frame and a connecting assembly; The support frame is arranged outside the boiler and is used to support the launcher mounting frame and the connection assembly; The emitter mounting frame is movably disposed on the supporting frame and movably connected to the connecting assembly, and is used to support the light source emitter; The connecting assembly is arranged on the supporting frame and is used for tightening or loosening the fiber grating sensor.

[0019] Specifically, the support frame includes: an auxiliary support rod and a support base; The auxiliary support rod is vertically arranged on the support base, and a sliding hole is arranged on the auxiliary support rod, and the launcher mounting frame is movably arranged on the support frame through the sliding hole; The connecting assembly is arranged on the supporting base.

[0020] Specifically, the launcher mounting frame includes: a sliding column, a sleeve, a first end plate and a second end plate; The sliding column is slidably disposed in the sliding hole of the auxiliary support rod and one end of the sliding column can extend into the connecting assembly; The sleeve is fixed in the connecting assembly, the sleeve has an emission through hole, and the light emission port of the light source emitter extends into the emission through hole and is fixed to the sleeve; The first end plate and the second end plate are parallel to each other and are arranged on the sliding column, and the light source emitter is supported by the first end plate and the second end plate.

[0021] Specifically, the connection assembly includes: a limiting column, a sliding tube, a spring column and a limiting ring; The limiting column is vertically fixed on the supporting base, and a first through hole and a first blind hole are formed on the limiting column. The first through hole, the second through hole and the first blind hole are arranged perpendicular to each other, and the extension direction of the second through hole and the extension direction of the first blind hole form a set angle, the sleeve of the launcher mounting frame is arranged in the first through hole, and the launch through hole of the sleeve is arranged coaxially with the first through hole; The limiting ring is fixedly sleeved on the outer wall of the sliding tube, the sliding tube is slidably arranged in the first through hole, and one end of the sliding tube is embedded in the emitting through hole of the sleeve, the sliding tube can move along the extension direction of the emitting through hole, one end of the fiber grating sensor passes through the tube of the sliding tube and is connected to the light emitting port of the light source transmitter, and the fiber grating sensor is fixed to the sliding tube; The spring column is slidably arranged in the first blind hole. Loosening the spring column can clamp the limit ring to tighten the fiber grating sensor, and pressing the spring column can loosen the limit ring to relax the fiber grating sensor. An inclined hole is provided on the spring column, and the extension direction of the inclined hole forms a set angle with the extension direction of the first blind hole, and the inclined hole is connected with the second through hole. One end of the sliding column passes through the second through hole and extends into the inclined hole and can move along the extension direction of the inclined hole. One end of the sliding column moves along the extension direction of the inclined hole, thereby controlling the compression and loosening of the spring column.

[0022] Specifically, the connection assembly further includes: a positioning rod; A positioning through hole is provided on the hole wall of the first blind hole, one end of the positioning rod is fixed on the spring column, and the other end extends into the positioning through hole.

[0023] Specifically, the connection assembly further includes: a plurality of compression springs; A compression spring is arranged between the spring column and the bottom of the first blind hole, between the limiting ring and the sleeve, and between the limiting column and the second end plate.

[0024] Another aspect of the present invention provides a method for supporting a fiber Bragg grating transceiver for stress and strain detection, based on the supporting device for a fiber Bragg grating transceiver for stress and strain detection described in any one of the above items, the supporting method comprises: A plurality of support components are arranged on the heating surface of the boiler water cooling tube to support the fiber Bragg grating sensor of the fiber Bragg grating transceiver; A plurality of protective components are arranged above the support component on the heating surface of the boiler water cooling tube, the support component corresponds to the protective component one by one, and the radial movement range of the fiber Bragg grating sensor is limited by the protective component; A transmitting support is arranged outside the boiler to support the light source transmitter of the fiber grating transceiver and to tighten or loosen the fiber grating sensor; A receiving support frame is arranged outside the boiler to support a receiving terminal of the fiber grating transceiver.

[0025] The support device of the fiber grating transceiver for stress and strain detection provided by the present invention is provided with a transmitting support outside the boiler to support the light source transmitter of the fiber grating transceiver and tighten or relax the fiber grating sensor through the transmitting support, and the receiving terminal is supported by the receiving support frame, and the stress and strain of the heating surface of the boiler water cooling pipe are detected by the fiber grating sensor. In order to support the part of the fiber grating sensor in the boiler, multiple supporting components and multiple protective components are provided on the heating surface of the boiler water cooling pipe, and the supporting components support the fiber grating sensor, and the corresponding protective components are provided above the supporting components to limit the radial movement range of the fiber grating sensor, and multiple supporting components and multiple protective components are provided on the heating surface of the boiler water cooling pipe. Multiple monitoring points are arranged to monitor the stress and strain of different monitoring points on the heating surface. The support device and supporting method of the fiber grating transceiver for stress and strain detection provided by the present invention solve the problem that the fiber grating sensor cannot be used to monitor the stress and strain of multiple monitoring points in the heating surface of the boiler in the prior art, and improve the measurement efficiency of the strain and stress of the heating surface of the boiler water cooling pipe.

[0026] Other features and advantages of the embodiments of the present invention will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific implementations, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. In the accompanying drawings: Figure 1 It is a structural schematic diagram of a supporting device for a fiber Bragg grating transceiver for stress and strain detection provided by an embodiment of the present invention; Figure 2 It is a schematic diagram of the installation of a protective component and a fiber Bragg grating sensor in a supporting device of a fiber Bragg grating transceiver for stress and strain detection provided by an embodiment of the present invention; Figure 3 It is a structural schematic diagram of a protective cover plate of a protective component in a supporting device of a fiber grating transceiver for stress and strain detection provided by an embodiment of the present invention in an open state; Figure 4 It is a structural schematic diagram of a protection component in a supporting device of a fiber Bragg grating transceiver for stress and strain detection provided by an embodiment of the present invention; Figure 5 It is a structural schematic diagram of a supporting assembly in a supporting device of a fiber Bragg grating transceiver for stress and strain detection provided by an embodiment of the present invention; Figure 6 It is a structural schematic diagram of a support of a support assembly in a support device of a fiber Bragg grating transceiver for stress and strain detection provided by an embodiment of the present invention; Figure 7It is a structural schematic diagram of a guide assembly in a supporting device of a fiber Bragg grating transceiver for stress and strain detection provided by an embodiment of the present invention; Figure 8 It is a structural schematic diagram of a transmitting support member in a supporting device of a fiber grating transceiver for stress and strain detection provided by an embodiment of the present invention; Fig. 9 is a cross-sectional view of a transmitting support member in a supporting device of a fiber grating transceiver for stress and strain detection provided by an embodiment of the present invention; Fig.10 It is a structural schematic diagram of a connection assembly of a transmitting support member in a supporting device of a fiber grating transceiver for stress and strain detection provided by an embodiment of the present invention; Fig.11 It is a schematic diagram of assembling the limiting column and the spring column of the transmitting support member in the supporting device of the fiber optic Bragg grating transceiver for stress and strain detection provided by the embodiment of the present invention.

[0028] Description of Reference Numerals 1-support assembly; 2-fiber grating sensor; 3-protection assembly; 4-guide assembly; 5-guide connecting rod; 6-transmitting support; 7-light source transmitter; 8-receiving support frame; 9-receiving terminal; 11-card; 12-support; 110-first card part; 111-second card part; 112-connecting rod; 113-connecting spring; 121-base; 122-first clamping column; 123-second clamping column; 124-cap; 125-limiting rod; 31-joining block; 32-connecting column; 33-protective cover plate; 34-temporary fixing piece; 3 5-wire groove; 41-rotating seat; 42-rotating connecting sleeve; 43-guide cylinder; 44-guide clamp; 45-arc guide rail; 60-support frame; 61-transmitter mounting frame; 62-connecting assembly; 310-waist hole; 330-U-shaped groove; 601-auxiliary support rod; 602-support base; 610-sliding column; 611-sleeve; 612-first end plate; 613-second end plate; 621-limiting column; 622-sliding tube; 623-spring column; 624-limiting ring; 625-positioning rod; 626-compression spring; 6211-first through hole; 6212-first blind hole; 6213-second through hole; 6231-inclined hole. DETAILED DESCRIPTION

[0029] The specific implementation of the embodiment of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the present invention, and is not used to limit the embodiment of the present invention.

[0030] Figure 1 It is a structural schematic diagram of a supporting device of a fiber Bragg grating transceiver for stress and strain detection; Figure 2It is a schematic diagram of the installation of the protective component and the fiber Bragg grating sensor in the supporting device of the fiber Bragg grating transceiver for stress and strain detection; Figure 3 It is a structural schematic diagram of a protective cover plate of a protective component in a supporting device of a fiber optic Bragg grating transceiver for stress and strain detection in an open state; Figure 4 It is a structural schematic diagram of a protective component in a supporting device of a fiber grating transceiver for stress and strain detection; Figure 5 It is a structural schematic diagram of a supporting component in a supporting device of a fiber grating transceiver for stress and strain detection; Figure 6 It is a structural schematic diagram of a support of a support assembly in a support device of a fiber grating transceiver for stress and strain detection; Figure 7 It is a structural schematic diagram of a guide component in a supporting device of a fiber grating transceiver for stress and strain detection; Figure 8 It is a structural schematic diagram of a transmitting support member in a supporting device of a fiber grating transceiver for stress and strain detection; Fig. 9 is a cross-sectional view of a transmitting support member in a supporting device of a fiber grating transceiver for stress and strain detection; Fig.10 It is a structural schematic diagram of a connection assembly of a transmitting support member in a supporting device of a fiber optic Bragg grating transceiver for stress and strain detection; Fig.11 The utility model is a schematic diagram of assembling the limit column and the spring column of the transmitting support member in the support device of the fiber optic grating transceiver for stress and strain detection.

[0031] like Figure 1-Figure 11 As shown, the present invention provides a support device for a fiber Bragg grating transceiver for stress and strain detection, wherein the fiber Bragg grating transceiver comprises a light source transmitter 7, a fiber Bragg grating sensor 2 and a receiving terminal 9, and the support device comprises: A support assembly 1, arranged on the heating surface of the boiler water cooling tube, for supporting the fiber grating sensor 2; The protection components 3 corresponding to the support components 1 are arranged on the heating surface of the boiler water cooling tube and above the corresponding support components 1. The protection components 3 are used to limit the radial movement range of the fiber grating sensor 2. An emission support 6, arranged outside the boiler, for supporting the light source emitter 7 and tightening or loosening the fiber grating sensor 2; The receiving support frame 8 is arranged outside the boiler and is used to support the receiving terminal 9 .

[0032] The support device of the fiber grating transceiver for stress and strain detection provided by the present invention has a transmitting support member 6 and a receiving support frame 8 arranged outside the boiler to respectively support the light source transmitter 7 and the receiving terminal 9 of the fiber grating transceiver, and a fiber grating sensor 2 is connected between the light source transmitter 7 and the receiving terminal 9; the heating surface of the boiler water cooling pipe is formed by the pipe wall of the water cooling pipe located in the boiler furnace and the fins connecting two adjacent boiler water cooling pipes. In order to monitor the stress and strain at multiple positions on the heating surface of the boiler water cooling pipe by the fiber grating transceiver, the fiber grating sensor 2 passes through the furnace of the boiler, and one end of the fiber grating sensor 2 is connected to the The fiber grating sensor 2 is connected to the light emitting port of the light source transmitter 7, and the other end is connected to the receiving terminal 9. The fiber grating sensor 2 is located in the boiler furnace to monitor the stress and strain of the heating surface of the boiler water cooling pipe. Multiple support components 1 are arranged on the heating surface of the boiler water cooling pipe and pre-arranged at the monitoring point where the stress and strain need to be monitored. The fiber grating corresponding to the monitoring point position can be opened on the fiber grating sensor 2 in advance. The support component 1 supports the fiber grating sensor 2 located in the boiler. The radial movement range of the fiber grating sensor 2 is limited by the protective component 3 to ensure that the fiber grating sensor 2 can maintain a suitable position with the monitoring point. The distance is used to ensure that the stress and strain results monitored at the monitoring point are accurate. When the fiber Bragg grating transceiver is used to monitor the stress and strain of the heated surface, the light source transmitter 7 emits a broadband light source into the fiber Bragg grating sensor 2. When the broadband light source enters the fiber Bragg grating of the fiber Bragg grating sensor 2, a transmission spectrum and a reflection spectrum are obtained. In the initial state, the grating pitch of the fiber Bragg grating is a known fixed value. When the grating pitch of the fiber Bragg grating at a monitoring point on the fiber Bragg grating sensor 2 changes due to the influence of stress, the reflection wavelength at that point can be obtained from the reflection spectrum. Further, based on the reflection wavelength, the grating pitch of the fiber Bragg grating at this time can be calculated, and then according to the change of the grating pitch, the reflection wavelength at that point can be obtained from the reflection spectrum. The strain here is calculated, and finally the stress here is calculated based on the known elastic modulus. In the present application, several fiber gratings are deployed in series to form a fiber grating sensor 2 with a longer length to realize the monitoring of stress and strain at several monitoring points. In the present application, multiple support components 1 and multiple protection components 3 are set up to arrange multiple monitoring points on the heating surface of the boiler water-cooling pipe to monitor the stress and strain of the heating surface, which solves the problem in the prior art that the fiber grating sensor cannot be used to monitor the stress and strain of multiple monitoring points in the heating surface of the boiler, and improves the measurement efficiency of the strain and stress of the heating surface of the boiler water-cooling pipe.

[0033] In one embodiment, Figure 5 As shown, the support assembly 1 includes: a clamping plate 11 and a support 12; The clamping plate 11 is arranged on the heating surface of the boiler water cooling pipe, and the clamping plate 11 is correspondingly connected with a support 12 , and the fiber grating sensor 2 is supported by the support 12 .

[0034] The card plate 11 includes: a first card plate portion 110, a second card plate portion 111 and a connecting rod portion 112; One end of the connecting rod portion 112 is fixed to the first clamping plate portion 110, and the other end is movably connected to the second clamping plate portion 111. The first clamping plate portion 110 and the second clamping plate portion 111 both have an arc surface that matches the shape of the outer wall of the boiler water-cooling tube, and are fixed to the outer wall of the boiler water-cooling tube through the arc surface.

[0035] The clamping plate 11 further includes a connecting spring 113 which is sleeved on the connecting rod portion 112 .

[0036] like Figure 6 As shown, the support 12 includes: a base portion 121, a first clamping column 122, a second clamping column 123 and a cap 124; The base portion 121 is fixed to the second clamping plate portion 111, a blind hole is opened on the base portion 121, and a first wire through hole is arranged on the hole wall of the blind hole; The first clamping column 122 and the second clamping column 123 are both movably arranged in the blind hole, and the second clamping column 123 is located above the first clamping column 122, a first arc groove is provided on the surface of the first clamping column 122 in contact with the second clamping column 123, and a second arc groove is provided on the surface of the second clamping column 123 in contact with the first clamping column 122, the first arc groove and the second arc groove enclose a second wire through hole, and the second wire through hole is coaxial with the first wire through hole; The cap 124 is screwed onto one end of a blind hole on the base 121, and the cap 124 tightens or loosens the abutment between the first clamping column 122 and the second clamping column 123 by rotation, wherein the fiber grating sensor 2 is supported by passing through the first wire through hole and the second wire through hole.

[0037] Each support seat 12 also includes a limiting rod 125; The limiting rod 125 is used to limit the movement of the first clamping column 122 in the blind hole.

[0038] The first clamping plate part 110 and the second clamping plate part 111 of the clamping plate 11 are fixed on the tube wall of the boiler water-cooling tube, and the first clamping plate part 110 and the second clamping plate part 111 are connected by a connecting rod part 112. One end of the connecting rod part 112 is fixed to the first clamping plate part 110, and the other end is movably connected to the second clamping plate part 111. A movable hole matching the connecting rod part 112 is provided on the second clamping plate part 111, and the other end of the connecting rod part 112 is movably extended into the movable hole and can move in the movable hole. The first clamping plate part 110 and the second clamping plate part 111 are in contact with the tube wall of the boiler water-cooling tube. The side that is in contact with the tube wall of the boiler water-cooling tube is an arc surface matching the shape of the tube wall of the boiler water-cooling tube. A connecting spring 113 is mounted on the connecting rod part 112. The fiber grating sensor 2 is connected by The support 12 connected to the second clamping plate portion 111 supports, when strain occurs at the monitoring point, the water-cooling pipe wall where the monitoring point is located will be strained, and the clamping plate 11 connected to the water-cooling pipe wall will deform as the water-cooling pipe wall is strained. Because the first clamping plate portion 110 and the second clamping plate portion 111 of the clamping plate 11 are movably connected, when the clamping plate 11 is deformed, the first clamping plate portion 110 and the second clamping plate portion 111 can better adapt to the deformation. At the same time, the elastic force generated by the connecting spring 113 arranged on the connecting rod portion 112 during strain can reduce the damage to the clamping plate 11 caused by the strain deformation. The number and installation position of the clamping plates 11 and the support 12 of each support assembly 1 are set according to the position of the monitoring point, such as Figure 5 As shown, two clamping plates 11 and corresponding supports 12 are arranged at a monitoring point, and the fiber grating sensor 2 is supported by the supports 12 of the two clamping plates 11 .

[0039] like Figure 6As shown, when the first clamping column 122 and the second clamping column 123 are abutted, the first arc-shaped groove on the surface where the first clamping column 122 contacts the second clamping column 123 and the second arc-shaped groove on the surface where the second clamping column 123 contacts the first clamping column 122 enclose a second wire-passing through hole, and the second wire-passing through hole matches the shape of the fiber grating sensor 2. The first clamping column 122 and the second clamping column 123 can be rotatably embedded in the blind hole of the base portion 121. A first limiting hole is provided on the first clamping column 122, and a second limiting hole is correspondingly provided on the base portion 121. One end of the limiting rod 125 passes through the second limiting hole and is embedded in the first limiting hole. The rotation of the first clamping column 122 in the blind hole is limited by the limiting rod 125. The base portion 121 is fixedly connected to the second clamping plate portion 111. A first wire-passing through hole coaxial with the second wire-passing through hole is provided on the hole wall of the blind hole 2. In order to facilitate alignment of the first arc-shaped groove and the second arc-shaped groove to form the second wire-passing through hole, a portion of the base portion 121 is cut away along the axial direction of the blind hole to expose the first arc-shaped groove and the second arc-shaped groove. One end of the fiber grating sensor 2 passes through the second wire-passing through hole and the first wire-passing through hole. The fiber grating sensor 2 is supported by the first wire-passing through hole and the second wire-passing through hole. In order to prevent the fiber grating sensor 2 from shaking and reduce unstable factors in the monitoring process, the cap 124 is tightened to press the second clamping column 123 through the cap 124, and the second clamping column 123 presses the first clamping column 122. The fiber grating sensor 2 passing through the second wire-passing through hole is clamped by the second clamping column 123 and the first clamping column 122 to prevent the fiber grating sensor 2 from shaking.

[0040] In order to limit the radial movement range of the fiber grating sensor 2, the protection assembly 3 includes: a plurality of splicing blocks 31, a plurality of connecting columns 32 and a protection cover plate 33; A plurality of splicing blocks 31 are arranged on the heating surface of the boiler water-cooling pipe, located above the clamping plate 11 of the support assembly 1, and two adjacent splicing blocks 31 are connected by a connecting column 32. A plurality of splicing blocks 31 are connected by the connecting column 32 to form a protective frame, and a sink is formed on the side of the protective frame away from the heating surface of the boiler water-cooling pipe, and corresponding wire grooves are opened on two opposite groove walls of the sink. The fiber grating sensor 2 is arranged to pass through two wire grooves 35 in sequence, and the protective cover plate 33 is movably arranged at the notch of the sink, and has a covering state of covering the sink and an opening state of exposing the sink, and the radial movement range of the fiber grating sensor 2 is limited by the protective cover plate 33, the sink and the wire groove 35.

[0041] The surface of each splicing block 31 fixed to the heating surface of the boiler water-cooling pipe is an arc-shaped surface that matches the shape of the outer wall of the boiler water-cooling pipe.

[0042] Each protection assembly 3 further includes: a temporary fixing member 34, which is used to temporarily fix the protection cover plate 33 when the protection cover plate 33 is in the closed state.

[0043] like Figure 2-Figure 4 As shown, each protection component includes four splicing blocks 31, and the four splicing blocks 31 are connected by connecting columns 32 to form a protection frame. Each splicing block 31 is arranged on the tube wall of the boiler water-cooling tube. The side of each splicing block 31 that contacts the tube wall of the water-cooling tube is an arc-shaped surface that matches the shape of the tube wall of the water-cooling tube. A connecting column 32 is connected between two adjacent splicing blocks 31. The connecting column 32 is a rubber column with a certain elasticity. When the heating surface of the boiler water-cooling tube is strained, the protection frame will deform accordingly. The protection frame is formed by connecting four splicing blocks 31 through elastic connecting columns 32. When the protection frame is deformed, the high elasticity of the connecting columns 32 can adapt to the deformation of the protection frame to avoid damage to the protection frame; a sink groove is formed on the side of the protection frame formed by splicing the splicing blocks 31 away from the tube wall of the boiler water-cooling tube, and a pair of groove walls corresponding to the sink groove are respectively provided with corresponding wire crossings. The fiber grating sensor 2 can sequentially pass through the wire groove 35 on one side of the groove wall, the sink groove and the corresponding wire groove 35 on the other side of the groove wall. The protective cover plate 33 of the sink groove slot is rotated to make the protective cover plate 33 cover the sink groove. In this way, the radial movement range of the fiber grating sensor 2 can be limited by the protective cover plate 33, the sink groove and the wire groove 35. The movement range of the fiber grating sensor 2 is limited between the groove bottom of the sink groove and the protective cover plate 33 to avoid the fiber grating sensor 2 from shaking. At the same time, the distance between the fiber grating sensor 2 and the heating surface of the water-cooling pipe is limited. The protective cover plate 33 is made of high-temperature resistant rubber material and can be slightly deformed. In order to prevent the protective cover plate 33 from opening suddenly due to a fault when it is in a closed state, a temporary fixing piece 34 is set to fix the protective cover plate 33 and a splicing block 31. The temporary fixing piece 34 is a bolt and nut structure, such as Figure 2-Figure 4 As shown, a waist-shaped hole 310 is opened on a splicing block 31, and a U-shaped groove 330 matching the size of the bolt is opened at a corresponding position on the protective cover plate 33. When the protective cover plate 33 covers the recessed groove, the screw rod of the bolt passes through the waist-shaped hole 310, the recessed groove and the U-shaped groove 330 in sequence, and the nut is screwed on the screw rod of the bolt. The protective cover plate 33 is fixed to a splicing block 31 by the bolt and nut structure to prevent the protective cover plate 33 from opening suddenly.

[0044] When monitoring the stress and strain of the heated surface, the monitoring points may not be in the same plane, and the fiber grating sensor 2 needs to be bent in the boiler. In order to guide the fiber grating sensor 2 to pass through each monitoring point, the supporting device also includes: guide connecting parts corresponding to the protection components 3 one by one, each guide connecting part includes a guide component 4 and a guide connecting rod 5, the guide component 4 is connected to the corresponding protection component 3 through the guide connecting rod 5, and the guide component 4 is used to guide the direction of the fiber grating sensor 2 in the boiler.

[0045] The guide assembly 4 includes: a hollow spherical rotating seat 41, a rotating connecting sleeve 42, a guide cylinder 43 and a pair of guide clamps 44; The rotating connection sleeve 42, the guide cylinder 43 and the guide connection rod 5 are all provided with through holes, and the rotating seat 41 is provided with a pair of through holes; The rotating connecting sleeve 42 is connected to the corresponding guide connecting rod 5 and one of the guide clips 44, and the other guide clip 44 is connected to the guide cylinder 43; Two arc guide rails 45 are arranged on the spherical surface of the rotating seat 41, and the two arc guide rails 45 are perpendicular to each other. A pair of guide clamps 44 are slidably arranged on the corresponding arc guide rails 45 respectively. The fiber grating sensor 2 can pass through the through hole of the guide cylinder 43, the pair of through holes of the rotating seat 41, the through hole of the rotating connecting sleeve 42 and the through hole of the guide connecting rod 5 in sequence. By sliding the guide clamp 44 on the arc guide rail 45, the direction of the fiber grating sensor 2 can be guided.

[0046] like Figure 7 As shown, two arc guide rails 45 are arranged on the spherical surface of the spherical rotating seat 41, and the two arc guide rails 45 are perpendicular to each other. A guide clamp 44 is arranged on each arc guide rail 45, wherein one guide clamp 44 is connected to the rotating connecting sleeve 42, and the rotating connecting sleeve 42 is also connected to the corresponding guide connecting rod 5, and the other guide clamp 44 is connected to the guide cylinder 43. The guide clamp 44 can move along the extension direction of the arc guide rail 45. The rotating seat 41 is a hollow sphere, and a pair of through holes are opened on the rotating seat 41 to communicate with the spherical inner cavity of the rotating seat 41. The fiber grating sensor 2 can pass through the through hole of the guide cylinder 43, a pair of through holes and the hollow inner cavity of the rotating seat 41, the through hole of the rotating connecting sleeve 42 and the through hole of the guide connecting rod 5. The guide clamp 44 slides along the corresponding arc guide rail 45 to change the direction of the fiber grating sensor 2 passing through the through hole of the guide cylinder 43 connected to the guide clamp 44. The two guide clamps 44 slide on the corresponding arc guide rails 45, which changes the bending angle of the fiber grating sensor 2 and ensures that the fiber grating sensor 2 can pass through different monitoring points on the heating surface of the boiler water-cooling pipe.

[0047] In one embodiment, in order to support the light source transmitter 7 and be able to tighten or loosen the fiber grating sensor 2, the transmitting support 6 includes: a supporting frame 60, a transmitter mounting frame 61 and a connecting assembly 62; The support frame 60 is arranged outside the boiler and is used to support the launcher mounting frame 61 and the connecting assembly 62; The emitter mounting frame 61 is movably disposed on the supporting frame 60 and movably connected to the connecting assembly 62, and is used to support the light source emitter 7; The connecting assembly 62 is disposed on the supporting frame 60 and is used to tighten or loosen the fiber grating sensor 2 .

[0048] The support frame 60 includes: an auxiliary support rod 601 and a support base 602; The auxiliary support rod 601 is vertically arranged on the support base 602, and a sliding hole is arranged on the auxiliary support rod 601, and the transmitter mounting frame 61 is movably arranged on the support frame 60 through the sliding hole; The connecting assembly 62 is disposed on the supporting base 602 .

[0049] The transmitter mounting frame 61 includes: a sliding column 610, a sleeve 611, a first end plate 612 and a second end plate 613; The sliding column 610 is slidably disposed on the support frame 60 and one end of the sliding column 610 can extend into the connecting component 62; The sleeve 611 is fixed in the connecting assembly 62, and the sleeve 611 has an emission through hole, and the light emission port of the light source emitter 7 extends into the emission through hole and is fixed to the sleeve 611; The first end plate 612 and the second end plate 613 are parallel to each other and are disposed on the sliding column 610 , and the light source emitter 7 is supported by the first end plate 612 and the second end plate 613 .

[0050] The connecting assembly 62 includes: a limiting column 621, a sliding tube 622, a spring column 623 and a limiting ring 624; The limiting column 621 is vertically fixed on the support frame 60, and a first through hole 6211, a second through hole 6213 and a first blind hole 6212 are formed on the limiting column 621. The first through hole 6211 and the first blind hole 6212 are arranged perpendicular to each other, and the extension direction of the second through hole 6213 and the extension direction of the first blind hole 6212 form a set angle. The sleeve 611 of the launcher mounting frame 61 is fixed in the first through hole 6211, and the launch through hole of the sleeve 611 is coaxially arranged with the first through hole 6211; The limiting ring 624 is fixedly sleeved on the outer wall of the sliding tube 622, the sliding tube 622 is slidably arranged in the first through hole 6211, and one end of the sliding tube 622 is embedded in the emission through hole of the sleeve 611, the sliding tube 622 can move along the extension direction of the emission through hole, one end of the fiber grating sensor 2 passes through the tube of the sliding tube 622 and is connected to the light emission port of the light source emitter 7, and the fiber grating sensor 2 is fixed to the sliding tube 622; The spring column 623 is slidably arranged in the first blind hole 6212. Loosening the spring column 623 can clamp the limit ring 624 to tighten the fiber Bragg grating sensor 2, and pressing the spring column 623 can loosen the limit ring 624 to relax the fiber Bragg grating sensor 2. An inclined hole 6231 is provided on the spring column 623. The extension direction of the inclined hole 6231 forms a set angle with the extension direction of the first blind hole 6212, and the inclined hole 6231 is connected with the second through hole 6213. One end of the sliding column 610 passes through the second through hole 6213 and extends into the inclined hole 6231 and can move along the extension direction of the inclined hole 6231. The movement of one end of the sliding column 610 along the extension direction of the inclined hole 6231 can drive the spring column 623 to move along the extension direction of the first blind hole 6212, thereby controlling the compression and loosening of the spring column 623.

[0051] The connecting assembly 62 further includes: a positioning rod 625; A positioning through hole is opened on the hole wall of the first blind hole 6212 , and one end of the positioning rod 625 is fixed on the spring column 623 , and the other end extends into the positioning through hole.

[0052] The connecting assembly 62 further includes: a plurality of compression springs 626; A compression spring 626 is disposed between the spring column 623 and the bottom of the first blind hole 6212 , between the limiting ring 624 and the sleeve 611 , and between the limiting column 621 and the second end plate 613 .

[0053] like Figure 8-Figure 9As shown, the auxiliary support rod 601 of the support frame 60 is vertically fixed on the support base 602, the extension direction of the sliding hole of the auxiliary support rod 601 is perpendicular to the extension direction of the first blind hole 6212, the extension direction of the sliding hole of the auxiliary support rod 601 is parallel to the extension direction of the first through hole 6211, one end of the sliding column 610 passes through the sliding hole on the auxiliary support rod 601 and can move along the extension direction of the sliding hole, one end of the sliding column 610 passes through the sliding hole, and then extends into the inclined hole 6231 of the spring column 623 through the second through hole 6213 on the sliding column 610, and the end face of one end of the sliding column 610 extending into the inclined hole 6231 is matched with the shape of the inclined hole 6231, and the sliding column 610 moves toward the inclined hole 6231 along the extension direction of the sliding hole. 231 deep, the end surface of the sliding column 610 extending into the inclined hole 6231 applies pressure to the spring column 623 to gradually compress the spring column 623 so that the spring column 623 moves toward the bottom of the first blind hole 6212, and at this time, the spring column 623 releases the limiting ring 624; when the end of the sliding column 610 extending into the inclined hole 6231 gradually withdraws toward the orifice of the inclined hole 6231 along the extension direction of the sliding hole, the pressure applied to the spring column 623 by the end surface of the sliding column 610 extending into the inclined hole 6231 gradually decreases, and the sliding column 610 gradually releases the pressure on the spring column 623 so that the spring column 623 gradually moves away from the bottom of the first blind hole 6212, and the spring column 623 clamps the limiting ring 624.

[0054] The light source emitter 7 is arranged between the first end plate 612 and the second end plate 613. The first end plate 612 and the second end plate 613 are vertically arranged on the sliding column 610. A through hole is provided on the second end plate 613. The light emission port of the light source emitter 7 passes through the through hole and extends from one end of the emission through hole of the sleeve 611 into the sleeve 611 and is fixed to the sleeve 611. One end of the slide tube 622 extends from the other end of the emission through hole of the sleeve 611 into the sleeve 611. The slide tube 622 can extend along the extension of the emission through hole. In order to better support the sliding of the slide tube 622, the slide tube 622 is slidably arranged in the first through hole 6211 of the limit column 621, the sleeve 611 is fixedly arranged in the first through hole 6211, and the emitting through hole of the sleeve 611, the first through hole 6211 and the tube of the slide tube 622 are coaxially arranged, and one end of the fiber grating sensor 2 passes through the tube of the slide tube 622 and is connected to the light emitting port of the light source transmitter 7, and the part of the fiber grating sensor 2 located in the slide tube 622 is aligned with the tube of the slide tube 622. The limiting ring 624 is fixed on the slide tube 622, and the limiting ring 624 can slide in the first through hole 6211 along the extension direction of the first through hole 6211 along the slide tube 622. The first through hole 6211 is a horizontal through hole, and the first blind hole 6212 is vertically arranged and perpendicular to the first through hole 6211. A spring column 623 is slidably arranged in the first blind hole 6212, and the spring column 623 can move up and down along the axial direction of the first blind hole 6212 to clamp or loosen the limiting ring 624. The spring column 623 faces One end face of the limiting ring 624 is a combined surface, which includes a slope surface, a horizontal surface and a vertical surface. The horizontal surface is located below the high point of the slope surface. The high point of the slope surface is located on the side of the end face of the spring column 623 facing the light source emitter 7. The low point of the slope surface is located on the side of the end face of the spring column 623 away from the light source emitter 7. There is a vertical surface between the horizontal surface and the slope surface. The vertical surface is arranged perpendicular to the horizontal surface. There is a drop between the horizontal surface and the high point of the slope surface. The outer ring shape of the limiting ring 624 is a conical surface that matches the shape of the slope surface.

[0055] When the fiber grating sensor 2 is tightened, the sliding tube 622 is pushed to move toward the light source transmitter 7 to gradually tighten the fiber grating sensor 2. When the sliding tube 622 drives the fiber grating sensor 2 and the limiting ring 624 to move synchronously toward the light source transmitter 7, the outer ring side surface of the limiting ring 624 slides from the low point of the slope surface to the high point, and generates downward pressure on the spring column 623. A compression spring 626 is arranged between the spring column 623 and the bottom of the first blind hole 6212, and a compression spring 626 is arranged between the limiting ring 624 and the sleeve 611. The compression spring 626 arranged between the spring column 623 and the bottom of the first blind hole 6212 is compressed under the action of pressure, and the compression spring 626 between the limiting ring 624 and the sleeve 611 is compressed under the action of the thrust applied to the sliding tube 622, and the outer ring side surface of the limiting ring 624 slides over the spring column 623. The rear limit ring 624 of the slope surface of the spring column 623 is stuck in the right-angle groove formed by the horizontal plane and the vertical plane. At this time, one end of the sliding column 610 extending into the inclined hole 6231 withdraws to the orifice of the inclined hole 6231, and the sliding column 610 releases the pressure on the spring column 623. The compression spring 626 arranged between the spring column 623 and the bottom of the first blind hole 6212 is reset. Under the action of the spring force, the spring column 623 moves away from the bottom of the first blind hole 6212 along the extension direction of the first blind hole 6212. The limit ring 624 is clamped by the spring column 623, and the fiber Bragg grating sensor 2 is always in a tensioned state. When the fiber Bragg grating sensor 2 is tensioned, the cap 124 is tightened to clamp the fiber Bragg grating sensor 2 passing through the second wire through hole through the second clamping column 123 and the first clamping column 122 to prevent the fiber Bragg grating sensor 2 from shaking in the boiler furnace.

[0056] When the fiber grating sensor 2 needs to be loosened for maintenance of the device, the sliding column 610 is pushed to move toward the side of the limiting column 621 along the extension direction of the sliding hole. One end of the sliding column 610 extends into the inclined hole 6231 and gradually penetrates into the inclined hole 6231 to apply pressure to the inclined surface of the inclined hole 6231. Under the action of the pressure, the spring column 623 gradually moves toward the bottom of the first blind hole 6212, and the right-angle groove formed by the horizontal surface and the vertical surface of one end face of the spring column 623 facing the limiting ring 624 moves toward the first blind hole 6212. A blind hole 6212 moves toward the bottom of the hole, thereby releasing the restriction on the limit ring 624, and the compression spring 626 between the sleeve 611 and the limit ring 624 is reset under the action of the spring force, and the slide tube 622 is reset to the initial position under the action of the spring force. At this time, the compression spring column 623 loosens the limit ring 624, and the slide tube 622 moves toward the side away from the light source transmitter 7 under the action of the spring force, thereby loosening the fiber grating sensor 2, making it easy to maintain and replace the various components of the device.

[0057] When the sliding column 610 is pushed to move toward the side of the limiting column 621, the compression spring 626 arranged between the limiting column 621 and the second end plate 613 is compressed. After the pushing of the sliding column 610 toward the side of the limiting column 621 stops, the sliding column 610 automatically resets under the action of the spring force of the compression spring 626 between the limiting column 621 and the second end plate 613.

[0058] A positioning through hole is opened on the hole wall of the first blind hole 6212, and a positioning rod 625 arranged on the spring column 623 extends into the positioning through hole. When the spring column 623 moves up and down along the axial direction of the first blind hole 6212, the moving range of the spring column 623 in the first blind hole 6212 is limited by the positioning rod 625 and the positioning through hole.

[0059] The present invention also provides a method for supporting a fiber Bragg grating transceiver for stress and strain detection, based on the supporting device for a fiber Bragg grating transceiver for stress and strain detection described in any one of the above items, the supporting method comprising: A plurality of support components are arranged on the heating surface of the boiler water cooling tube to support the fiber Bragg grating sensor of the fiber Bragg grating transceiver; A plurality of protective components are arranged above the support component on the heating surface of the boiler water cooling tube, the support component corresponds to the protective component one by one, and the radial movement range of the fiber Bragg grating sensor is limited by the protective component; A transmitting support is arranged outside the boiler to support the light source transmitter of the fiber grating transceiver and to tighten or loosen the fiber grating sensor; A receiving support frame is arranged outside the boiler to support a receiving terminal of the fiber grating transceiver.

[0060] A plurality of support components and protective components are arranged on the heating surface of the boiler water-cooling pipe, the support components and the protective components correspond to each other one by one, and the protective components are arranged on the support components, the fiber grating sensor of the fiber grating transceiver is supported by the support component, and the radial movement range of the fiber grating sensor is limited by the protective component, the light source transmitter of the fiber grating transceiver is arranged outside the boiler and supported by a transmitting support, and the transmitting support can also tighten or relax the fiber grating sensor, and the receiving terminal of the fiber grating transceiver is also arranged outside the boiler and supported by a takeover support frame, and after the fiber grating transceiver is supported by a supporting device of the fiber grating transceiver for stress and strain detection, the stress and strain of the heating surface of the boiler water-cooling pipe are detected by the fiber grating transceiver.

[0061] The support device of the fiber grating transceiver for stress and strain detection provided by the present invention is provided with a transmitting support outside the boiler to support the light source transmitter of the fiber grating transceiver and tighten or relax the fiber grating sensor through the transmitting support, and the receiving terminal is supported by the receiving support frame, and the stress and strain of the heating surface of the boiler water cooling pipe are detected by the fiber grating sensor. In order to support the part of the fiber grating sensor in the boiler, multiple supporting components and multiple protective components are provided on the heating surface of the boiler water cooling pipe, and the supporting components support the fiber grating sensor, and the corresponding protective components are provided above the supporting components to limit the radial movement range of the fiber grating sensor, and multiple supporting components and multiple protective components are provided on the heating surface of the boiler water cooling pipe. Multiple monitoring points are arranged to monitor the stress and strain of different monitoring points on the heating surface. The support device and supporting method of the fiber grating transceiver for stress and strain detection provided by the present invention solve the problem that the fiber grating sensor cannot be used to monitor the stress and strain of multiple monitoring points in the heating surface of the boiler in the prior art, and improve the measurement efficiency of the strain and stress of the heating surface of the boiler water cooling pipe.

[0062] The optional implementation modes of the embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the above implementation modes. Within the technical concept of the embodiments of the present invention, various simple modifications can be made to the technical scheme of the embodiments of the present invention, and these simple modifications all belong to the protection scope of the embodiments of the present invention.

[0063] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the embodiments of the present invention will not further describe various possible combinations.

[0064] In addition, various implementation modes of the embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the embodiments of the present invention, they should also be regarded as the contents disclosed by the embodiments of the present invention.

Claims

1. A supporting device for a fiber Bragg grating transceiver for stress and strain detection, the fiber Bragg grating transceiver comprising a light source transmitter (7), a fiber Bragg grating sensor (2) and a receiving terminal (9), characterized in that: The supporting device comprises: A plurality of support components (1), arranged on the heating surface of the boiler water cooling tube, and used for supporting the fiber grating sensor (2); A protective component (3) corresponding to each of the support components (1) is arranged on the heating surface of the boiler water cooling tube and is located above the corresponding support component (1), and the protective component (3) is used to limit the radial movement range of the fiber grating sensor (2); An emission support (6) is arranged outside the boiler and is used to support the light source emitter (7) and to tighten or loosen the fiber grating sensor (2); A receiving support frame (8) is arranged outside the boiler and is used to support the receiving terminal (9).

2. The support device according to claim 1, characterized in that: The support assembly (1) comprises: a clamping plate (11) and a support (12); The clamping plate (11) is arranged on the heating surface of the boiler water cooling tube, and the clamping plate (11) is connected to the support (12) correspondingly, and the optical fiber grating sensor (2) is supported by the support (12).

3. The supporting device according to claim 2, characterized in that: The clamping plate (11) comprises: a first clamping plate portion (110), a second clamping plate portion (111) and a connecting rod portion (112); One end of the connecting rod portion (112) is fixed to the first clamping plate portion (110), and the other end is movably connected to the second clamping plate portion (111); the first clamping plate portion (110) and the second clamping plate portion (111) both have an arcuate surface that matches the shape of the outer wall of the boiler water-cooling tube, and are fixed to the outer wall of the boiler water-cooling tube via the arcuate surface.

4. The supporting device according to claim 3, characterized in that: The clamping plate (11) further comprises: a connecting spring (113) which is sleeved on the connecting rod portion (112).

5. The supporting device according to claim 4, characterized in that: The support (12) comprises: a base portion (121), a first clamping column (122), a second clamping column (123) and a cover cap (124); The base portion (121) is fixed to the second clamping plate portion (111), a blind hole is provided on the base portion (121), and a first wire passing through hole is provided on the hole wall of the blind hole; The first clamping column (122) and the second clamping column (123) are both movably arranged in the blind hole, and the second clamping column (123) is located above the first clamping column (122); a first arc groove is provided on a surface of the first clamping column (122) that contacts the second clamping column (123); a second arc groove is provided on a surface of the second clamping column (123) that contacts the first clamping column (122); the first arc groove and the second arc groove enclose a second wire passing hole, and the second wire passing hole is coaxial with the first wire passing hole; The cap (124) is screwed onto one end of the base portion (121) having a blind hole, and the cap (124) is rotated to tighten or loosen the abutment between the first clamping column (122) and the second clamping column (123), wherein the fiber grating sensor (2) is supported by passing through the first wire through hole and the second wire through hole.

6. The supporting device according to claim 5, characterized in that: Each support seat (12) also includes a limit rod (125); The limiting rod (125) is used to limit the movement of the first clamping column (122) in the blind hole.

7. The supporting device according to claim 1, characterized in that: The protection assembly (3) comprises: a plurality of splicing blocks (31), a plurality of connecting columns (32) and a protection cover plate (33); A plurality of splicing blocks (31) are arranged on the heating surface of the boiler water-cooling pipe and are located above the corresponding clamping plate (11) of the support assembly (1). Two adjacent splicing blocks (31) are connected by a connecting column (32). The plurality of splicing blocks (31) are connected by the connecting column (32) to form a protective frame. A sink is formed on a side of the protective frame away from the heating surface of the boiler water-cooling pipe. Two opposite groove walls of the sink are provided with corresponding wire-passing grooves (35). The fiber optic Bragg grating sensor (2) is arranged to pass through the two wire-passing grooves (35) in sequence. The protective cover plate (33) is movably arranged at the notch of the sink and has a covering state in which the sink is covered and an opening state in which the sink is exposed. The radial movement range of the fiber optic Bragg grating sensor (2) is limited by the protective cover plate (33), the sink and the wire-passing groove (35).

8. The supporting device according to claim 7, characterized in that: The surface of each splicing block (31) fixed to the heating surface of the boiler water cooling tube is an arc-shaped surface that matches the shape of the outer wall of the boiler water cooling tube.

9. The supporting device according to claim 7, characterized in that: Each protection assembly (3) further comprises: a temporary fixing member (34) for temporarily fixing the protection cover plate (33) when the protection cover plate (33) is in a closed state.

10. The supporting device according to claim 1, characterized in that: The supporting device further comprises: a guide connecting piece corresponding one-to-one with the protection assembly (3); Each guide connection member comprises a guide assembly (4) and a guide connection rod (5); the guide assembly (4) is connected to a corresponding protection assembly (3) via the guide connection rod (5); and the guide assembly (4) is used to guide the direction of the fiber optic grating sensor (2) in the boiler.

11. The support device according to claim 10, characterized in that: The guide assembly (4) comprises a hollow spherical rotating seat (41), a rotating connecting sleeve (42), a guide cylinder (43) and a pair of guide clamps (44); The rotating connection sleeve (42), the guide cylinder (43) and the guide connection rod (5) are all provided with through holes, and the rotating seat (41) is provided with a pair of through holes; The rotating connection sleeve (42) is connected to the corresponding guide connection rod (5) and one of the guide clips (44), and the other guide clip (44) is connected to the guide cylinder (43); Two arc guide rails (45) are arranged on the spherical surface of the rotating seat (41), and the two arc guide rails (45) are perpendicular to each other. A pair of guide clamps (44) are slidably arranged on a corresponding arc guide rail (45), and the fiber grating sensor (2) can sequentially pass through the through hole of the guide cylinder (43), the pair of through holes of the rotating seat (41), the through hole of the rotating connecting sleeve (42) and the through hole of the guide connecting rod (5), and slide on the arc guide rail (45) through the guide clamp (44), thereby guiding the direction of the fiber grating sensor (2).

12. The support device according to claim 1, characterized in that: The launch support (6) comprises: a support frame (60), a launcher mounting frame (61) and a connecting assembly (62); The support frame (60) is arranged outside the boiler and is used to support the launcher mounting frame (61) and the connection assembly (62); The emitter mounting frame (61) is movably disposed on the support frame (60) and movably connected to the connecting assembly (62), and is used to support the light source emitter (7); The connection assembly (62) is arranged on the support frame (60) and is used to tighten or loosen the fiber optic grating sensor (2).

13. The supporting device according to claim 12, characterized in that: The support frame (60) comprises: an auxiliary support rod (601) and a support base (602); The auxiliary support rod (601) is vertically arranged on the support base (602), and a sliding hole is arranged on the auxiliary support rod (601), and the transmitter mounting frame (61) is movably arranged on the support frame (60) through the sliding hole; The connection assembly (62) is arranged on the support base (602).

14. The supporting device according to claim 13, characterized in that: The launcher mounting frame (61) comprises: a sliding column (610), a sleeve (611), a first end plate (612) and a second end plate (613); The sliding column (610) is slidably disposed in the sliding hole of the auxiliary support rod (601) and one end of the sliding column can extend into the connecting assembly (62); The sleeve (611) is fixed in the connecting assembly (62), the sleeve (611) having an emission through hole, and the light emission port of the light source emitter (7) extends into the emission through hole and is fixed to the sleeve (611); The first end plate (612) and the second end plate (613) are parallel to each other and are arranged on the sliding column (610), and the light source emitter (7) is supported by the first end plate (612) and the second end plate (613).

15. The supporting device according to claim 14, characterized in that: The connection assembly (62) comprises: a limiting column (621), a sliding tube (622), a spring column (623) and a limiting ring (624); The limiting column (621) is vertically fixed on the supporting base (602); a first through hole (6211), a second through hole (6213) and a first blind hole (6212) are provided on the limiting column (621); the first through hole (6211) and the first blind hole (6212) are arranged perpendicular to each other; an extension direction of the second through hole (6213) and an extension direction of the first blind hole (6212) form a set angle; a sleeve (611) of the launcher mounting frame (61) is arranged in the first through hole (6211); and a launch through hole of the sleeve (611) and the first through hole (6211) are arranged coaxially; The limiting ring (624) is fixedly sleeved on the outer wall of the sliding tube (622); the sliding tube (622) is slidably arranged in the first through hole (6211); one end of the sliding tube (622) is embedded in the emission through hole of the sleeve (611); the sliding tube (622) is movable along the extension direction of the emission through hole; one end of the fiber grating sensor (2) passes through the tube of the sliding tube (622) and is connected to the light emission port of the light source emitter (7); and the fiber grating sensor (2) is fixed to the sliding tube (622); The spring column (623) is slidably disposed in the first blind hole (6212); loosening the spring column (623) can clamp the limiting ring (624) to tighten the fiber optic Bragg grating sensor (2); pressing the spring column (623) can loosen the limiting ring (624) to relax the fiber optic Bragg grating sensor (2); an inclined hole (6231) is provided on the spring column (623); an extending direction of the inclined hole (6231) forms a set angle with an extending direction of the first blind hole (6212); The inclined hole (6231) is connected to the second through hole (6213); one end of the sliding column (610) passes through the second through hole (6213) and extends into the inclined hole (6231) and is capable of moving along the extension direction of the inclined hole (6231); the movement of one end of the sliding column (610) along the extension direction of the inclined hole (6231) can drive the spring column (623) to move along the extension direction of the first blind hole (6212), thereby controlling the compression and loosening of the spring column (623).

16. The support device according to claim 15, characterized in that The connecting assembly (62) further includes: a positioning rod (625); A positioning through hole is provided on the hole wall of the first blind hole (6212); one end of the positioning rod (625) is fixed on the spring column (623), and the other end extends into the positioning through hole.

17. The support device according to claim 16, characterized in that: The connecting assembly (62) further includes: a plurality of compression springs (626); A compression spring (626) is provided between the spring column (623) and the bottom of the first blind hole (6212), between the limiting ring (624) and the sleeve (611), and between the limiting column (621) and the second end plate (613).

18. A method for supporting a fiber Bragg grating transceiver for stress and strain detection, based on the supporting device for a fiber Bragg grating transceiver for stress and strain detection according to any one of claims 1 to 17, characterized in that: The supporting method comprises: A plurality of support components are arranged on the heating surface of the boiler water cooling tube to support the fiber Bragg grating sensor of the fiber Bragg grating transceiver; A plurality of protective components are arranged above the support component on the heating surface of the boiler water cooling tube, the support component corresponds to the protective component one by one, and the radial movement range of the fiber Bragg grating sensor is limited by the protective component; A transmitting support is arranged outside the boiler to support the light source transmitter of the fiber grating transceiver and to tighten or loosen the fiber grating sensor; A receiving support frame is arranged outside the boiler to support a receiving terminal of the fiber grating transceiver.

Images