Leakage detection device for air pre-heater

Abstract

The invention provides an air pre-heater leakage detection device. The air pre-heater leakage detection device comprises a moving structure, a movable structure and a plurality of detection structures, the moving structure is movably arranged on a supporting base surface opposite to the pipe orifice end surface of the to-be-detected pipe fitting; at least part of the movable structure is movably arranged on the moving structure relative to the pipe fitting to be detected; the plurality of detection structures are respectively arranged on at least part of the movable structure, each detection structure is provided with a matching part used for being in sealed connection with a pipe orifice of a to-be-detected pipe fitting, the matching part is provided with an air vent communicated with the interior of the to-be-detected pipe fitting, and each detection structure comprises an air pressure sensor communicated with the air vent; the method and the device are used for detecting the real-time air pressure value at the pipe orifice of the to-be-detected pipe, so that the problems of low efficiency and low accuracy of manual leakage detection of the air pre-heater in the prior art are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of air preheater leakage detection, and in particular to an air preheater leakage detection device. Background Art

[0002] At present, air preheater (APU) as a heat exchange device in the boiler system effectively utilizes the waste heat of the flue gas at the tail of the boiler and improves the combustion efficiency. In circulating fluidized bed boilers, tubular APU is widely used due to its simple structure and low theoretical air leakage rate. However, tubular APU is susceptible to low-temperature corrosion during operation, resulting in decreased corrosion resistance, aggravated air leakage, and affected boiler efficiency. Therefore, it is necessary to regularly check the leakage of tubular APU.

[0003] However, the existing technology mainly relies on manual inspection of tubular air preheaters, which is not only inefficient, but also difficult to ensure the accuracy of the inspection under complex inspection environments. The inspection end surface is welded by a large number of round pipe openings and steel plates. The welds and other complex environments make the inspection process difficult. It not only takes a lot of time, but also under complex conditions, manual inspection often has difficulty in capturing subtle leaks, which directly affects the accuracy of the inspection. In addition, the subjectivity and labor intensity of manual inspection also limit the frequency and comprehensiveness of inspection. Summary of the invention

[0004] The main purpose of the present invention is to provide an air preheater leakage detection device to solve the problem of low efficiency and low accuracy in the prior art of manual detection of air preheater leakage.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, there is provided an air preheater leakage detection device, comprising: a movable structure, movably arranged on a supporting base surface arranged opposite to the end face of the pipe mouth of the pipe fitting to be detected; an active structure, at least a part of the active structure is movably arranged on the movable structure relative to the pipe fitting to be detected; a plurality of detection structures, respectively arranged on at least a part of the active structure, each detection structure having a mating portion for sealingly connecting with the pipe mouth of the pipe fitting to be detected, the mating portion being provided with an air vent connected to the inside of the pipe fitting to be detected, and the detection structure comprising an air pressure sensor connected to the air vent for detecting the real-time air pressure value at the pipe mouth of the pipe fitting to be detected.

[0006] Furthermore, the detection structure includes: a mounting seat, which is arranged on the movable structure; a connecting piece, which is relatively movably connected to the mounting seat, and a mating part is arranged on the connecting piece, so that when the movable structure drives the mating part on the connecting piece to be sealed and connected with the pipe to be detected, the connecting piece and the mounting seat move relatively close to each other.

[0007] Furthermore, the matching part includes: a first sealing member, which is an annular structure and is arranged on the connecting member for abutting against the end face of the pipe mouth of the pipe to be detected; a second sealing member, which is arranged on the connecting member and located in the middle of the first sealing member, the outer peripheral wall of the second sealing member is matched and connected with the inner annular wall of the first sealing member, the vent is arranged on the second sealing member, and a ventilation channel is provided on the connecting member corresponding to the vent, and the air pressure sensor is connected to the ventilation channel through the air pipe.

[0008] Furthermore, the detection structure also includes: multiple guide rods, the first ends of the multiple guide rods are relatively movably arranged in the multiple through holes on the mounting seat, and the second ends of the multiple guide rods are relatively movably arranged in the multiple connecting holes on the connecting member.

[0009] Furthermore, the detection structure also includes: a plurality of first elastic members, which are arranged one-to-one corresponding to the plurality of guide rods, one end of the first elastic member is connected to the first end of the guide rod, and the other end of the first elastic member is connected to the inner wall of the through hole; a plurality of second elastic members, which are arranged one-to-one corresponding to the plurality of guide rods, one end of the second elastic member is connected to the second end of the guide rod, and the other end of the second elastic member is connected to the inner wall of the connecting hole.

[0010] Furthermore, the movable structure includes: two movable components, which are relatively arranged on the mobile structure; a mounting plate, which is respectively connected to at least part of the two movable components, and multiple detection structures are respectively arranged on the mounting plates, so that the two movable components drive the multiple detection structures to move relative to the pipe to be detected.

[0011] Furthermore, the movable component includes: a mounting frame, a mounting plate relatively movably connected to the mounting frame; a driving component, which is arranged on the mounting frame and the output shaft of the driving component is connected to the mounting plate, so that the driving component drives the mounting plate to drive multiple detection structures to move relative to the pipe to be detected.

[0012] Furthermore, the mounting frame includes: a fixed seat; two mounting columns, which are relatively arranged on the fixed seat, and a moving rod that can move along its extension direction is passed through the mounting column, one end of the moving rod is connected to the mounting plate, and a transmission assembly is connected between the two moving rods, so that when the driving component drives the mounting plate to move, the two moving rods move synchronously in their respective mounting columns.

[0013] Furthermore, the transmission assembly includes: a support frame, which is arranged on a fixed seat; a connecting shaft, which is rotatably arranged on the support frame, gears are respectively provided at both ends of the connecting shaft, an arc groove connected to the interior of the mounting column is provided on the mounting column, and a rack segment is provided on the moving rod, and at least part of the gear extends into the arc groove and is meshed with the rack segment.

[0014] Furthermore, the mobile structure includes: a mobile body, the movable structure is arranged on the mobile body; a plurality of guide wheels, which are rotatably connected to the bottom of the mobile body, and each guide wheel is provided with a plurality of anti-slip parts at intervals along its circumferential direction for adsorption on the supporting base surface; wherein the anti-slip part is a suction cup or an anti-slip protrusion.

[0015] By applying the technical solution of the present invention, an air preheater leakage detection device is provided, comprising a movable structure, an active structure and a plurality of detection structures; the movable structure is movably arranged on a supporting base surface arranged opposite to the end face of the pipe mouth of the pipe fitting to be detected; at least a part of the active structure is movably arranged on the movable structure relative to the pipe fitting to be detected; a plurality of detection structures are respectively arranged on at least a part of the active structure, each detection structure having a mating portion for sealingly connecting with the pipe mouth of the pipe fitting to be detected, the mating portion being provided with a vent connected to the inside of the pipe fitting to be detected, and the detection structure comprising an air pressure sensor connected to the vent for detecting the real-time air pressure value at the pipe mouth of the pipe fitting to be detected.

[0016] In this way, during operation, the mobile structure can be moved on the supporting wall on the side of the pipe mouth end face of the pipe fitting to be detected to realize the mobile function of the detection device, and then it can quickly and accurately move to the position aligned with the pipe mouth end faces of multiple pipe fittings to be detected, so as to facilitate the subsequent sealing connection between multiple detection structures and the pipe mouth end faces of multiple pipe fittings to be detected, without relying on manual handling, which significantly improves the scope and flexibility of detection. Driven by the movable structure, the matching parts of each detection structure can be tightly matched and connected with the pipe mouth end face of the pipe fitting to be detected to achieve effective sealing, which helps the air pressure sensor of the detection structure to more accurately capture the real-time air pressure changes of the pipe mouth to determine whether the pipe fitting to be detected is leaking, improves the accuracy of leakage detection, avoids the tediousness and time-consuming manual positioning and alignment, and avoids the subjective judgment errors that may be caused by manual detection, thereby solving the problem of low efficiency and low accuracy of manual detection of air preheater leakage in the prior art. In addition, automated detection reduces labor costs, improves detection speed, and reduces equipment maintenance and operation costs caused by untimely detection or detection errors, thereby achieving cost-effectiveness optimization. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 It shows a schematic diagram of the overall structure of an embodiment of an air preheater leakage detection device according to the present invention;

[0019] Figure 2It shows a schematic structural diagram of an embodiment of an air preheater leakage detection device according to the present invention in a working state;

[0020] Figure 3 A schematic structural diagram of active components of an embodiment of an air preheater leakage detection device according to the present invention is shown;

[0021] Figure 4 A side view of a movable component of an embodiment of an air preheater leakage detection device according to the present invention is shown;

[0022] Figure 5 A schematic structural diagram of a detection structure according to an embodiment of an air preheater leakage detection device of the present invention is shown.

[0023] The above drawings include the following reference numerals:

[0024] 1. Pipe fittings to be tested; 2. Support base surface;

[0025] 10. Mobile structure; 11. Mobile body; 12. Guide wheel; 120. Anti-skid part;

[0026] 20. movable structure; 21. movable assembly; 210. mounting frame; 2101. fixing seat; 2102. mounting column; 2103. motion rod; 2104. arc groove; 211. driving component; 22. mounting plate; 23. transmission assembly; 230. supporting frame; 231. connecting shaft; 232. gear;

[0027] 30. Detection structure; 31. Matching part; 310. Vent; 311. First sealing member; 312. Second sealing member; 32. Mounting seat; 33. Connecting member; 34. Air pipe; 35. Guide rod; 36. First elastic member; 37. Second elastic member. DETAILED DESCRIPTION

[0028] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] In order to solve the problem of low efficiency and low accuracy in manual detection of air preheater leakage in the prior art, the present invention provides an air preheater leakage detection device.

[0030] Please refer to Figures 1 to 5As shown, the present invention provides an air preheater leakage detection device, comprising a movable structure 10, an active structure 20 and a plurality of detection structures 30; the movable structure 10 is movably arranged on a supporting base surface 2 arranged opposite to the end surface of the pipe mouth of the pipe fitting 1 to be detected; at least a part of the movable structure 20 is movably arranged on the movable structure 10 relative to the pipe fitting 1 to be detected; a plurality of detection structures 30 are respectively arranged on at least a part of the active structure 20, each detection structure 30 has a matching portion 31 for sealingly connecting with the pipe mouth of the pipe fitting 1 to be detected, and a vent 310 connected to the inside of the pipe fitting 1 to be detected is provided on the matching portion 31, and the detection structure 30 includes an air pressure sensor connected to the vent 310, so as to detect the real-time air pressure value at the pipe mouth of the pipe fitting 1 to be detected.

[0031] The technical solution applied to the present invention can be moved on the supporting wall on the side of the pipe mouth end face of the pipe fitting 1 to be detected by the movable structure 10 during operation to realize the moving function of the detection device, and then can quickly and accurately move to the position aligned with the pipe mouth end faces of multiple pipe fittings 1 to be detected, so as to facilitate the subsequent sealing connection between multiple detection structures 30 and the pipe mouth end faces of multiple pipe fittings 1 to be detected, without relying on manual handling, which significantly improves the scope and flexibility of detection. Driven by the movable structure 20, the matching part 31 of each detection structure 30 can be tightly matched and connected with the pipe mouth end face of the pipe fitting 1 to be detected to achieve effective sealing, which helps the air pressure sensor of the detection structure 30 to more accurately capture the real-time air pressure changes of the pipe mouth to determine whether the pipe fitting 1 to be detected is leaking, improves the accuracy of leakage detection, avoids the tediousness and time-consuming manual positioning and alignment, and avoids the subjective judgment errors that may be caused by manual detection, thereby solving the problem of low efficiency and low accuracy of manual detection of air preheater leakage in the prior art. In addition, automated testing reduces labor costs, improves testing speed, and reduces equipment maintenance and operating costs caused by untimely or erroneous testing, thereby optimizing cost-effectiveness.

[0032] like Figure 5As shown, the detection structure 30 includes a mounting seat 32 and a connecting member 33; the mounting seat 32 is arranged on the movable structure 20; the connecting member 33 is relatively movably connected to the mounting seat 32, and the matching portion 31 is arranged on the connecting member 33, so that when the movable structure 20 drives the matching portion 31 on the connecting member 33 to seal and connect with the pipe 1 to be detected, the connecting member 33 and the mounting seat 32 move relatively close. Through the above arrangement, the movable connection between the connecting member 33 and the mounting seat 32 enables the matching portion 31 on the connecting member 33 to be fine-tuned according to the size and position of the pipe mouth, ensuring accurate sealing with the pipe mouth of the pipe 1 to be detected, thereby improving the sealing performance and detection accuracy during the detection process. When the movable structure 20 drives the detection structure 30 to move toward the pipe 1 to be detected, the relative movement between the connecting piece 33 and the mounting seat 32 can adapt to slight changes in the size of the pipe orifice or irregular shapes, ensuring that even when there is a weld or slight deformation at the pipe orifice, the mating portion 31 can be effectively sealed with the pipe orifice of the pipe 1 to be detected under the pressure of the connecting piece 33, thereby enhancing the adaptability and flexibility of the detection device.

[0033] Specifically, the mating part 31 includes a first seal 311 and a second seal 312; the first seal 311 is annular and is arranged on the connecting piece 33, so as to abut against the end face of the pipe mouth of the pipe fitting 1 to be detected; the second seal 312 is arranged on the connecting piece 33 and is located in the middle of the first seal 311, and the outer peripheral wall of the second seal 312 is matched and connected with the inner annular wall of the first seal 311, and the vent 310 is arranged on the second seal 312, and a ventilation channel is provided on the connecting piece 33 corresponding to the vent 310, and the air pressure sensor is connected to the ventilation channel through the air pipe 34.

[0034] Through the above-mentioned arrangement, the combined use of the first seal 311 and the second seal 312 realizes a double-layer seal, which greatly enhances the air tightness between the detection structure 30 and the pipe mouth of the pipe fitting 1 to be detected. The first seal 311 is used as a peripheral seal, which is sealed against the end face of the pipe mouth of the pipe fitting 1 to be detected, and can effectively isolate the external environment, while the second seal 312 is directly in contact with the inside of the pipe mouth, providing a tighter sealing effect, ensuring the accuracy during the detection process. The vent 310 is set on the second seal 312, and the vent 310 corresponds precisely to the ventilation channel on the connector 33, which ensures that the air pressure sensor can accurately measure the air pressure changes inside the pipe mouth without external interference, ensuring the high accuracy and reliability of the detection data. In addition, the first seal 311 and the second seal 312 are usually made of a material with a certain elasticity, which can adapt to the slight irregularities of the end face of the pipe mouth. Even in the presence of welds or slight deformations, under the compression of the connecting piece 33, they can maintain a good seal with the pipe mouth of the pipe 1 to be inspected, thereby improving the adaptability of the detection device and the stability of the detection process.

[0035] In order to facilitate the alignment and sealing connection between the matching part 31 and the pipe mouth of the pipe to be detected 1, the detection structure 30 also includes a plurality of guide rods 35, the first ends of the plurality of guide rods 35 are respectively and relatively movably correspondingly penetrated in the plurality of through holes on the mounting seat 32, and the second ends of the plurality of guide rods 35 are respectively and relatively movably correspondingly penetrated in the plurality of connection holes on the connecting member 33. Through the above arrangement, the guide rod 35 provides precise guidance for the connecting member 33, ensuring that the connecting member 33 can be smoothly and accurately aligned with the pipe mouth when it moves toward the pipe to be detected 1 under the drive of the movable structure 20, thereby improving the accuracy of the sealed connection and the stability of the detection process. And effectively limit the freedom of movement of the connecting member 33, limit its movement path to a preset straight line direction, avoid offset or rotation during the movement process, and ensure the accuracy during the detection. At the same time, the design of the guide rod 35 makes it easier to fine-tune and reset the connecting member 33 in the process of docking with the pipe mouth of the pipe to be detected 1. Even if the initial alignment is not accurate, it can be easily adjusted to the correct position through the guidance of the guide rod 35, thereby improving the convenience and efficiency of the detection operation.

[0036] Specifically, the detection structure 30 further includes a plurality of first elastic members 36 and a plurality of second elastic members 37; the plurality of first elastic members 36 are arranged one-to-one with the plurality of guide rods 35, one end of the first elastic member 36 is connected to the first end of the guide rod 35, and the other end of the first elastic member 36 is connected to the inner wall of the through hole; the plurality of second elastic members 37 are arranged one-to-one with the plurality of guide rods 35, one end of the second elastic member 37 is connected to the second end of the guide rod 35, and the other end of the second elastic member 37 is connected to the inner wall of the connection hole. In this way, when the movable structure 20 drives the matching portion 31 on the connecting member 33 to be sealed and connected with the pipe 1 to be detected, under the elastic force of the first elastic member 36 and the second elastic member 37, the connecting member 33 moves relative to the mounting seat 32 along the extension direction of the guide rod 35 to adapt to the irregularity or slight deformation of the pipe mouth of the pipe 1 to be detected, and can also ensure that the matching portion 31 on the connecting member 33 is in close contact with the end face of the pipe mouth, so as to achieve a good sealing effect. At the same time, after the detection is completed, it can provide a restoring force for the connecting member 33, thereby improving adaptability and flexibility. Furthermore, the addition of the elastic member can also play a shock-absorbing role, reduce the impact of external vibration or impact on the detection structure 30 during the detection process, maintain the stability of the air pressure sensor reading, and improve the reliability of the data.

[0037] In this embodiment, the first elastic member 36 and the second elastic member 37 are both springs.

[0038] like Figures 1 to 3As shown, the movable structure 20 includes two movable components 21 and a mounting plate 22; the two movable components 21 are relatively arranged on the mobile structure 10; the mounting plates 22 are respectively connected to at least part of the two movable components 21, and multiple detection structures 30 are respectively arranged on the mounting plates 22, so that the two movable components 21 drive the multiple detection structures 30 to move relative to the pipe 1 to be detected. In this way, the two movable components 21 can simultaneously drive the multiple detection structures 30 installed on the mounting plate 22 to work, which means that during the detection process, multiple pipes 1 to be detected can be detected at the same time, which greatly improves the detection efficiency and shortens the overall detection time.

[0039] Specifically, the movable assembly 21 includes a mounting frame 210 and a driving component 211; the mounting plate 22 is relatively movably connected to the mounting frame 210; the driving component 211 is arranged on the mounting frame 210 and the output shaft of the driving component 211 is connected to the mounting plate 22, so that the driving component 211 drives the mounting plate 22 to drive the multiple detection structures 30 to move relative to the pipe 1 to be detected. In this way, after the movable structure 10 moves on the supporting wall to a position corresponding to the pipe 1 to be detected, the driving components 211 of the two movable assemblies 21 respectively drive the mounting plate 22 to drive the multiple detection structures 30 to move toward the multiple pipes 1 to be detected, ensuring that all the pipes 1 to be detected are detected under the same conditions, thereby enhancing the accuracy and reliability of the detection device.

[0040] In this embodiment, the driving component 211 is a linear motor.

[0041] like Figure 4 As shown, the mounting frame 210 includes a fixing seat 2101 and two mounting posts 2102; the two mounting posts 2102 are relatively arranged on the fixing seat 2101, and a moving rod 2103 that can move along its extension direction is inserted into the mounting post 2102, one end of the moving rod 2103 is connected to the mounting plate 22, and a transmission assembly 23 is connected between the two moving rods 2103, so that when the driving component 211 drives the mounting plate 22 to move, the two moving rods 2103 move synchronously in their respective mounting posts 2102. Through the above arrangement, the transmission assembly 23 connects the two moving rods 2103, ensuring that when the driving component 211 drives the mounting plate 22 to move, the two moving rods 2103 can move synchronously and accurately in the predetermined direction in their respective mounting posts 2102 to support the mounting plate 22, and this synchronization performance is the basis for realizing reliable detection of multiple detection structures 30 at the same time. Furthermore, the transmission assembly 23 can efficiently transmit the power of the driving component 211 to the motion rod 2103, thereby avoiding the loss during the power transmission process and ensuring the smoothness of the movement and the efficiency of the detection.

[0042] Specifically, the transmission assembly 23 includes a support frame 230 and a connecting shaft 231; the support frame 230 is arranged on the fixed seat 2101; the connecting shaft 231 is rotatably arranged on the support frame 230, and gears 232 are respectively arranged at both ends of the connecting shaft 231, and an arc groove 2104 connected to the inside of the mounting column 2102 is provided, and the moving rod 2103 has a rack section, and at least part of the gear 232 extends into the arc groove 2104 and is meshed with the rack section. In this way, through the meshing connection between the gear 232 and the rack section, the rotational motion of the connecting shaft 231 can be efficiently converted into the linear motion of the moving rod 2103, and the loss in the power transmission process is small, ensuring that the output of the driving component 211 can be accurately transmitted to the motion of the detection structure 30. At the same time, through the design of the support frame 230 and the arc groove 2104, the transmission assembly 23 can be compactly installed in the mounting frame 210, saving space, optimizing the overall layout and structural design of the detection device, and improving the detection efficiency.

[0043] like Figure 2 As shown, the mobile structure 10 includes a mobile body 11 and a plurality of guide wheels 12; the movable structure 20 is arranged on the mobile body 11; the plurality of guide wheels 12 are rotatably connected to the bottom of the mobile body 11, and each guide wheel 12 is provided with a plurality of anti-slip portions 120 at intervals along its circumferential direction for adsorption on the supporting base 2; wherein the anti-slip portion 120 is a suction cup or an anti-slip protrusion.

[0044] In this embodiment, the mobile structure 10 is a mobile wall-climbing mechanism that can generally be adsorbed on a steel wall, and the working adsorption surface of the mobile structure 10 is arranged on the supporting wall surface on the side of the end face of the air preheater tube to be inspected. The wall surface is relatively flat relative to the end face of the air preheater tube to be inspected, which is conducive to the simplified design of the mobile structure 10 and the realization of the motion function.

[0045] Through the above-mentioned configuration, the design of the anti-skid portion 120 (such as a suction cup or an anti-skid protrusion) can ensure that the detection device moves stably on the supporting base surface 2, especially on an uneven or slightly inclined base surface, which can effectively prevent sliding and displacement, and ensure the stability and positioning accuracy of the device during the detection process. At the same time, the guide wheel 12 and the anti-skid portion 120 act together on the supporting base surface 2, which can reduce the vibration caused by uneven friction or uneven base surface during movement, which is particularly important for air pressure sensors that require precise measurement, because any slight vibration may affect the accuracy of the detection result.

[0046] In the present application, the movable structure 10 moves on the supporting wall on the side of the end face of the air preheater tube to be tested. During testing, the driving component 211 of the movable structure 20 operates to drive the detection structure 30 to gradually approach the end face of the air preheater tube to be tested until the end face of the air preheater tube to be tested is pressed. If the air preheater tube to be tested has a leak when the internal induced draft fan is turned on, different air pressure values ​​will be generated at the pipe mouth. Then, after the air pressure sensor of the detection structure 30 obtains the precise air pressure value of the pipe mouth when the air preheater tube to be tested is in a sealed state, it can be determined whether the air preheater tube to be tested has a leak.

[0047] It should be noted that, according to the detection efficiency requirements, multiple groups of detection structures 30 can be set, and each group of detection mechanisms includes multiple detection structures 30. After a single action completes the measurement, the driving component 211 operates to drive the multiple groups of detection structures 30 away from the end face of the air preheater tube to be tested, and then the moving structure 10 moves the detection structure 30 to the next detection area, and the above actions are repeated to complete the leakage detection of the entire air preheater tube to be tested.

[0048] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0049] A pre-device leakage detection device comprises a mobile structure 10, an active structure 20 and a plurality of detection structures 30; the mobile structure 10 is movably arranged on a supporting base surface 2 arranged opposite to the end surface of the pipe mouth of the pipe fitting 1 to be detected; at least a part of the active structure 20 is movably arranged on the mobile structure 10 relative to the pipe fitting 1 to be detected; a plurality of detection structures 30 are respectively arranged on at least a part of the active structure 20, each detection structure 30 has a matching portion 31 for sealingly connecting with the pipe mouth of the pipe fitting 1 to be detected, and a vent 310 connected to the inside of the pipe fitting 1 to be detected is provided on the matching portion 31, and the detection structure 30 includes an air pressure sensor connected to the vent 310, so as to detect the real-time air pressure value at the pipe mouth of the pipe fitting 1 to be detected. In this way, during operation, the movable structure 10 can be moved on the supporting wall on the side of the pipe mouth end face of the pipe fitting 1 to be detected to realize the moving function of the detection device, and then it can quickly and accurately move to a position aligned with the pipe mouth end faces of multiple pipe fittings 1 to be detected, so as to facilitate the subsequent sealing connection between multiple detection structures 30 and the pipe mouth end faces of multiple pipe fittings 1 to be detected, without relying on manual handling, which significantly improves the scope and flexibility of detection. Driven by the movable structure 20, the matching part 31 of each detection structure 30 can be tightly matched and connected with the pipe mouth end face of the pipe fitting 1 to be detected to achieve effective sealing, which helps the air pressure sensor of the detection structure 30 to more accurately capture the real-time air pressure changes of the pipe mouth to determine whether the pipe fitting 1 to be detected is leaking, improves the accuracy of leakage detection, avoids the tediousness and time-consuming manual positioning and alignment, and avoids the subjective judgment errors that may be caused by manual detection, thereby solving the problem of low efficiency and low accuracy of manual detection of air preheater leakage in the prior art. In addition, automated testing reduces labor costs, improves testing speed, and reduces equipment maintenance and operating costs caused by untimely or erroneous testing, thereby optimizing cost-effectiveness.

[0050] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0051] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0052] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0053] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0054] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An air preheater leakage detection device, characterized in that: include: A movable structure (10) is movably arranged on a supporting base surface (2) arranged opposite to the end surface of the pipe opening of the pipe member (1) to be inspected; a movable structure (20), at least a portion of which is movably arranged on the movable structure (10) relative to the pipe (1) to be inspected; A plurality of detection structures (30) are respectively arranged on at least part of the movable structure (20), each of the detection structures (30) having a matching portion (31) for sealingly connecting with the pipe mouth of the pipe fitting (1) to be detected, the matching portion (31) being provided with a vent (310) communicating with the interior of the pipe fitting (1) to be detected, and the detection structure (30) comprising an air pressure sensor communicating with the vent (310) for detecting a real-time air pressure value at the pipe mouth of the pipe fitting (1) to be detected.

2. The air preheater leakage detection device according to claim 1, characterized in that: The detection structure (30) comprises: A mounting seat (32) disposed on the movable structure (20); The connecting member (33) is relatively movably connected to the mounting seat (32), and the matching portion (31) is arranged on the connecting member (33), so that when the movable structure (20) drives the matching portion (31) on the connecting member (33) to be sealed and connected with the pipe (1) to be tested, the connecting member (33) and the mounting seat (32) move relatively close to each other.

3. The air preheater leakage detection device according to claim 2, characterized in that: The matching portion (31) comprises: A first sealing member (311) is an annular structure and is arranged on the connecting member (33) so as to abut against the end face of the pipe opening of the pipe member (1) to be tested; The second sealing member (312) is arranged on the connecting member (33) and is located in the middle of the first sealing member (311); the outer peripheral wall of the second sealing member (312) is cooperatively connected with the inner annular wall of the first sealing member (311); the vent (310) is arranged on the second sealing member (312); a vent channel is arranged on the connecting member (33) corresponding to the vent (310); and the air pressure sensor is connected to the vent channel through an air pipe (34).

4. The air preheater leakage detection device according to claim 2, characterized in that: The detection structure (30) further comprises: A plurality of guide rods (35), wherein the first ends of the plurality of guide rods (35) are respectively and relatively movably arranged in correspondence with the plurality of through holes on the mounting seat (32), and the second ends of the plurality of guide rods (35) are respectively and relatively movably arranged in correspondence with the plurality of connection holes on the connection member (33).

5. The air preheater leakage detection device according to claim 4, characterized in that: The detection structure (30) further comprises: A plurality of first elastic members (36) are arranged in one-to-one correspondence with the plurality of guide rods (35), one end of the first elastic member (36) is connected to the first end of the guide rod (35), and the other end of the first elastic member (36) is connected to the inner wall of the through hole; A plurality of second elastic members (37) are arranged in one-to-one correspondence with the plurality of guide rods (35), one end of the second elastic member (37) is connected to the second end of the guide rod (35), and the other end of the second elastic member (37) is connected to the inner wall of the connecting hole.

6. The air preheater leakage detection device according to claim 1, characterized in that: The activity structure (20) comprises: Two movable components (21) are arranged opposite to each other on the movable structure (10); The mounting plate (22) is respectively connected to at least a portion of the two movable components (21), and the plurality of detection structures (30) are respectively arranged on the mounting plate (22), so that the two movable components (21) drive the plurality of detection structures (30) to move relative to the pipe (1) to be detected.

7. The air preheater leakage detection device according to claim 6, characterized in that: The active component (21) comprises: A mounting frame (210), wherein the mounting plate (22) is relatively movably connected to the mounting frame (210); A driving component (211) is arranged on the mounting frame (210) and an output shaft of the driving component (211) is connected to the mounting plate (22), so that the driving component (211) drives the mounting plate (22) to drive the plurality of detection structures (30) to move relative to the pipe (1) to be detected.

8. The air preheater leakage detection device according to claim 7, characterized in that: The mounting frame (210) comprises: Fixed seat (2101); Two mounting posts (2102) are arranged on the fixing seat (2101) opposite to each other, and a moving rod (2103) movable along its extension direction is inserted into the mounting post (2102), one end of the moving rod (2103) is connected to the mounting plate (22), and a transmission assembly (23) is connected between the two moving rods (2103), so that when the driving component (211) drives the mounting plate (22) to move, the two moving rods (2103) move synchronously in their respective mounting posts (2102).

9. The air preheater leakage detection device according to claim 8, characterized in that: The transmission assembly (23) comprises: A support frame (230) is arranged on the fixing seat (2101); A connecting shaft (231) is rotatably arranged on the support frame (230), and gears (232) are respectively arranged at both ends of the connecting shaft (231). An arc groove (2104) communicating with the interior of the mounting column (2102) is arranged on the mounting column (2102), and a rack section is arranged on the moving rod (2103), and at least a portion of the gear (232) extends into the arc groove (2104) and is meshed and connected with the rack section.

10. The air preheater leakage detection device according to claim 1, characterized in that: The mobile structure (10) comprises: A mobile body (11), wherein the movable structure (20) is arranged on the mobile body (11); A plurality of guide wheels (12) are rotatably connected to the bottom of the mobile body (11), and each guide wheel (12) is provided with a plurality of anti-slip portions (120) spaced apart along its circumferential direction for adsorption on the supporting base surface (2); Wherein, the anti-slip portion (120) is a suction cup or an anti-slip protrusion.

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