A multifunctional detection mirror for construction engineering detection

CN122689657APending Publication Date: 2026-09-04HUAIAN COSCO ENG TESTING CO LTD
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Patent Information

Application Number
CN202610870408.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-06-16
Publication Date
2026-09-04

AI Technical Summary

Technical Problem

[0005]本建筑工程检测镜针对施工现场灰尘大、环境湿度高易导致镜片积灰、起雾的问题进行优化,综合实用性显著提升

Benefits of technology

1.本装置经过重新设计,显著提升了装置内部的清洁程度,保持反射镜一和反射镜二表面洁净,从而更加便于观察和后续的检测工作,为实现这一目的,本装置通过设置有位于观测框右侧的正压源为管道的内部持续提供向左的正压气流,并依次通过观测框和反射镜二之间的缝隙、连接管三、连接管二、连接管一、检测框和开口,由经过开口排出的正压气流对靠近检测目标的反射镜一提供空气防护,可以辅助隔绝灰尘,且持续流动的气流还能保持管道的内部避免灰尘堆积。

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Abstract

The application relates to the field of building engineering detection, and discloses a multifunctional detection mirror for building engineering detection, which comprises a pipeline, the pipeline is composed of connecting pipe one, connecting pipe two and connecting pipe three, a detection frame is arranged at the left end of the connecting pipe one, an observation frame is arranged at the right end of the connecting pipe three, a placing groove is arranged in the connecting pipe two, an electric heating wire is arranged in the placing groove, and a reflecting mirror one is arranged in the detection frame. The positive pressure source arranged at the right side of the observation frame continuously provides the left positive pressure airflow for the inside of the pipeline, and the positive pressure airflow discharged through the opening successively passes through the gap between the observation frame and the reflecting mirror two, the connecting pipe three, the connecting pipe two, the connecting pipe one, the detection frame and the opening, the reflecting mirror one close to the detection target is provided with air protection by the positive pressure airflow, dust can be assisted to be isolated, and the continuously flowing airflow can also keep the inside of the pipeline from being accumulated with dust.
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Description

Technical Field

[0001] This application relates to the field of building engineering testing technology, and in particular to a multifunctional testing mirror for building engineering testing. Background Technology

[0002] Construction engineering refers to the physical engineering project formed by the construction of various types of buildings and their ancillary facilities, as well as the installation of supporting lines, pipelines, and equipment. "Buildings" refer to projects with roofs, beams, columns, walls, foundations, and internal spaces that meet people's needs for production, residence, study, and public activities. After construction is completed, construction projects often require inspection, primarily targeting areas inaccessible to construction workers, such as wall seams and pipe welds. Current technology mainly utilizes the periscope principle, supplemented by lighting to illuminate the inspection location, thus achieving the purpose of observation and inspection. However, because the environment for construction inspection is often poor, with dust or excessive humidity at the construction site, it negatively impacts the operation of optical inspection lenses. Dust can easily enter the lens, leading to low visibility, while excessive humidity can cause condensation on the lens, making inspection and observation impossible. Therefore, a solution is urgently needed. Summary of the Invention

[0003] This application proposes a multifunctional inspection mirror for building engineering inspection, which has the advantages of protecting the internal cleanliness and facilitating observation and inspection, thereby solving the problems of the prior art.

[0004] To achieve the above objectives, this application adopts the following technical solution: a multifunctional inspection mirror for building engineering inspection, comprising a pipe, the pipe being composed of a connecting pipe one, a connecting pipe two, and a connecting pipe three. A detection frame is installed at the left end of the connecting pipe one, and an observation frame is installed at the right end of the connecting pipe three. A placement groove is provided inside the connecting pipe two, and a heating wire is installed inside the placement groove. A reflector one is installed inside the detection frame, and a reflector two is installed inside the observation frame. A positive pressure source is installed on the right side of the observation frame. A through groove is provided at the joint of the connecting pipe one and the connecting pipe three, and a heat exchange component is fixedly installed inside the through groove. The heat exchange component is integrally welded together by heat-conducting plate one, heat-conducting plate two, and heat-conducting plate three, and the heat-conducting plate three is fixedly connected to the connecting pipe two.

[0005] This construction engineering inspection mirror has been optimized to address the problems of dust accumulation and fogging on the lens caused by high humidity and dusty environments at construction sites, significantly improving its overall practicality. The device is equipped with a positive pressure source that continuously delivers directional airflow into the pipeline. The airflow flows along the pipeline past two reflectors and exits from the inspection frame opening, forming an air curtain barrier at the inspection front end. This effectively prevents external dust from entering the mirror body, while the continuous airflow enables self-cleaning of the lens and the pipeline inner wall, ensuring clear optical observation. The device incorporates heating wires and heat exchange components inside the connecting pipe, uniformly heating the flowing air. The warm airflow continuously blows across the reflector surface, effectively preventing fogging in high-humidity environments and solving the problem of obstructed observation in humid conditions. This design also features two sets of circumferentially distributed spiral components that guide the airflow into a spiral direction. Centrifugal force increases the contact area between the airflow and the heating wire, significantly improving heating efficiency. Simultaneously, the spiral airflow also cleans dust adhering to the heating wire surface. In addition, the equipment is equipped with supplemental lighting to supplement the on-site illumination, and the observation end is equipped with a rubber buffer sleeve to improve the comfort of use. The overall structure takes into account multiple functions such as dustproof, anti-fog, efficient heating and lighting protection, and is suitable for complex construction sites, effectively improving the detection efficiency and stability of building gaps and hidden points.

[0006] Preferably, the top of the detection frame is fixedly connected to an opening, a supplementary light is installed on the outer edge of the top of the opening, an observation tube is fixedly installed on the top of the observation frame, and a buffer sleeve is fitted onto the top of the observation tube.

[0007] Preferably, a number of protective sleeves with the same number of through slots are fixedly connected between the outer sides of the first connecting pipe and the second connecting pipe. The second heat-conducting plate is located in the protective sleeve. The first heat-conducting plate is made of VC heat spreader plate or brass.

[0008] Preferably, the positive pressure source includes a fixed cylinder fixedly installed on the right side of the observation frame. One end of the fixed cylinder is connected to the observation frame, and the other end of the fixed cylinder is provided with a limiting groove. A filter screen is sealed inside the limiting groove, and a fan is fixedly installed inside the fixed cylinder.

[0009] Preferably, gaps are left between the front and rear ends of the second reflector and the inner wall of the observation frame, and the buffer sleeve is made of rubber block.

[0010] Preferably, two sets of spiral components are fixedly installed on the right side of the inner wall of the connecting pipe three. The spiral component includes a connecting pipe spirally wound around the inner wall of the connecting pipe three. One end of the connecting pipe is open and communicates with the inner cavity of the connecting pipe three. The other end of the connecting pipe passes through to the outside of the connecting pipe three and is fixedly connected to the spiral pipe. One end of the spiral pipe passes through the observation frame to the right and communicates with the inside of the positive pressure source. The positive pressure source is not connected to the observation frame.

[0011] Preferably, there are two spiral components, which are circumferentially and equidistantly distributed inside the connecting pipe.

[0012] Preferably, the inner diameter of the two ends of the second connecting pipe is smaller than the inner diameter of the placement groove, and the inner diameter of the third connecting pipe is equal to that of the first connecting pipe and larger than the inner diameter of the two ends of the third connecting pipe.

[0013] The beneficial effects of this invention are as follows: 1. This device has been redesigned to significantly improve the cleanliness of its interior, keeping the surfaces of reflectors one and two clean, thus facilitating observation and subsequent testing. To achieve this, the device uses a positive pressure source located on the right side of the observation frame to continuously supply positive pressure airflow to the inside of the pipe, which then passes sequentially through the gap between the observation frame and reflector two, connecting pipe three, connecting pipe two, connecting pipe one, the detection frame, and the opening. The positive pressure airflow discharged through the opening provides air protection for reflector one, which is close to the detection target, and can help isolate dust. The continuous airflow also prevents dust accumulation inside the pipe.

[0014] 2. Then, the device also installs a heating wire inside the second connecting pipe and a heat exchange component inside the first connecting pipe. The purpose is to heat the positive pressure airflow from the positive pressure source and the third connecting pipe. Since the first reflector is closest to the target, if the humidity of the surrounding environment of the target is high, fog may form on the surface of the first reflector. The positive pressure airflow heated by the heating wire and the heat exchange component continuously passes over the surface of the first reflector and heats it, thus preventing fog formation. At the same time, the second reflector, which is far from the target, can also avoid fogging on its surface through the continuous flow of air inside the observation frame. The fixed cylinder is equipped with an annular dryer to dehumidify the air passing through the positive pressure source.

[0015] 3. The spiral component of this invention directly connects the inner cavity of the positive pressure source and the interior of the connecting pipe three. In this state, the observation frame is isolated from and not connected to the positive pressure source. At this time, the positive pressure airflow from the inside of the positive pressure source is guided by the spiral pipe and the connecting pipe to enter the inner cavity of the connecting pipe three in a spiral path, and forms a horizontal leftward spiral airflow inside the connecting pipe three. Under its own centrifugal force, the spiral airflow begins to enter the interior of the placement slot, thereby increasing the contact area between the positive pressure airflow and the heating wire, making the heating of the positive pressure airflow more efficient. At the same time, it helps to remove the dust on the surface of the heating wire located in the inner cavity of the placement slot. Attached Figure Description

[0016] The accompanying drawings, which form part of this specification, illustrate embodiments disclosed in this application and, together with the specification, serve to explain the principles of this application in a clear and understandable manner.

[0017] This disclosure will become clearer with reference to the accompanying drawings and the following detailed description, wherein: Figure 1 This is a frontal perspective view of the overall structure of the present invention; Figure 2 This is a front sectional view of the overall structure of the present invention; Figure 3 For the present invention Figure 2 Enlarged schematic diagram of the structure at point A; Figure 4 This is a schematic diagram showing the separation of the observation frame, second reflector, observation cylinder, buffer sleeve, positive pressure source, and heat exchange components of the present invention. Figure 5 This is a front sectional view of the connecting pipe and the spiral component in Embodiment 2 of the present invention; Figure 6 This is a schematic diagram of the structure of the spiral component of the present invention; Figure 7 This is a side view of the observation frame and positive pressure source in Embodiment 2 of the present invention.

[0018] The components are as follows: 1. Pipe; 2. Detection frame; 3. Reflector 1; 4. Opening; 5. Supplemental light; 6. Observation frame; 7. Reflector 2; 8. Observation tube; 9. Buffer sleeve; 10. Positive pressure source; 101. Fixing tube; 102. Limiting groove; 103. Filter screen; 104. Fan; 11. Connecting pipe 1; 12. Connecting pipe 2; 13. Connecting pipe 3; 14. Heating wire; 15. Protective sleeve; 16. Placement groove; 17. Through groove; 18. Heat exchange component; 181. Heat conducting plate 1; 182. Heat conducting plate 2; 183. Heat conducting plate 3; 19. Spiral component; 191. Spiral tube; 192. Connecting pipe. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0020] Please see Figures 1-7 This embodiment discloses a multifunctional inspection mirror for building engineering inspection, including a pipe 1. The pipe 1 is composed of a first connecting pipe 11, a second connecting pipe 12, and a third connecting pipe 13. An inspection frame 2 is installed at the left end of the first connecting pipe 11, and an observation frame 6 is installed at the right end of the third connecting pipe 13.

[0021] Example 1

[0022] The interior of the second connecting pipe 12 is provided with a placement groove 16, and the interior of the placement groove 16 is equipped with an electric heating wire 14. The interior of the detection frame 2 is equipped with a reflector 3, the interior of the observation frame 6 is equipped with a reflector 7, and the right side of the observation frame 6 is equipped with a positive pressure source 10. The joint of the first connecting pipe 11 and the third connecting pipe 13 is provided with a through groove 17, and the interior of the through groove 17 is fixedly equipped with a heat exchange component 18. The heat exchange component 18 is integrally welded from a heat-conducting plate 181, a heat-conducting plate 2 182, and a heat-conducting plate 3 183. The heat-conducting plate 3 183 is fixedly connected to the second connecting pipe 12. This device has been redesigned to significantly improve the cleanliness of its interior, keeping the surfaces of reflector 3 and reflector 7 clean, thus facilitating observation and subsequent testing. To achieve this, the device uses a positive pressure source 10 located on the right side of the observation frame 6 to continuously provide a leftward positive pressure airflow to the inside of the pipe 1. The airflow passes sequentially through the gap between the observation frame 6 and reflector 7, connecting pipe 3 13, connecting pipe 2 12, connecting pipe 1 11, the detection frame 2, and the opening 4. The positive pressure airflow discharged through the opening 4 provides air protection for reflector 3, which is close to the detection target, and can help isolate dust. The continuous airflow also prevents dust accumulation inside the pipe 1.

[0023] Then, the device also installs a heating wire 14 inside the connecting pipe 2 12 and a heat exchange component 18 inside the connecting pipe 1 11. The purpose is to heat the positive pressure airflow from the positive pressure source 10 and the connecting pipe 3 13. Since the reflector 3 is closest to the detection target, if the humidity of the surrounding environment of the detection target is high, fog may form on the surface of the reflector 3. The positive pressure airflow heated by the heating wire 14 and the heat exchange component 18 continuously passes over and heats the surface of the reflector 3, preventing fog formation. At the same time, the reflector 2 7, which is far from the detection target, can also avoid fogging on its surface through the continuous airflow inside the observation frame 6. The fixed cylinder 101 is equipped with an annular dryer for dehumidifying the air passing through the positive pressure source 10. Figure 5 As shown.

[0024] Among them, the top of the detection frame 2 is fixedly connected to the opening 4, and the outer edge of the top of the opening 4 is equipped with a supplementary light 5. The top of the observation frame 6 is fixedly installed with an observation tube 8, and the top of the observation tube 8 is fitted with a buffer sleeve 9. like Figure 2 As shown, reflector 3 and reflector 7 are respectively installed at both ends of the pipe 1. The optical reflection image of the target is transmitted using the periscope principle, and supplementary lighting 5 is provided for the target in conjunction with the ring-shaped supplementary lighting 5.

[0025] Among them, the outer sides of connecting pipe 11 and connecting pipe 2 are fixedly connected with the same number of protective sleeves 15 as the through slots 17, and the heat-conducting plate 2 182 is located in the protective sleeve 15. The heat-conducting plate 181 is made of VC heat-dissipating plate or brass. like Figure 2 As shown, the heat-conducting plate 181 has the largest contact area with the air. It absorbs heat from the heating wire 14 through the heat-conducting plate 182 and the heat-conducting plate 183, thereby continuously providing heat exchange guarantee for the positive pressure airflow entering the connecting pipe 11.

[0026] The positive pressure source 10 includes a fixed cylinder 101 fixedly installed on the right side of the observation frame 6. One end of the fixed cylinder 101 is connected to the observation frame 6, and the other end of the fixed cylinder 101 is provided with a limiting groove 102. A filter screen 103 is sealed inside the limiting groove 102, and a fan 104 is fixedly installed inside the fixed cylinder 101. like Figure 4 As shown, the positive pressure source 10 mainly relies on the fan 104 to generate a positive pressure airflow to the left. When the positive pressure airflow passes through the observation frame 6 and enters the interior of the pipe 1, it can assist the reflector 3 in resisting the risk of fogging in the external dust and high humidity environment. The filter screen 103 is used to filter the dust entering the fixed cylinder 101.

[0027] Among them, the front and rear ends of the second reflector 7 are left with gaps between them and the inner wall of the observation frame 6, and the buffer sleeve 9 is made of rubber blocks. like Figure 4 As shown, the gap between the inner wall of the observation frame 6 and the second reflector 7 allows positive pressure airflow from the positive pressure source 10 to pass through, thereby entering the pipe 1 through the second reflector 7. This significantly accelerates the airflow speed near the second reflector 7 and assists the second reflector 7 in self-cleaning.

[0028] Example 2

[0029] Two sets of spiral components 19 are fixedly installed on the right side of the inner wall of the connecting pipe 13. The spiral component 19 includes a connecting pipe 192 spirally wound around the inner wall of the connecting pipe 13. One end of the connecting pipe 192 is open and communicates with the inner cavity of the connecting pipe 13. The other end of the connecting pipe 192 passes through to the outside of the connecting pipe 13 and is fixedly connected to a spiral pipe 191. One end of the spiral pipe 191 passes through the observation frame 6 to the right and communicates with the inside of the positive pressure source 10. The positive pressure source 10 is not connected to the observation frame 6. like Figures 5-7As shown, the spiral component 19 is directly connected to the inner cavity of the positive pressure source 10 and the interior of the connecting pipe 13. In this state, the observation frame 6 is isolated from the positive pressure source 10 and is not connected. At this time, the positive pressure airflow from the inside of the positive pressure source 10 is guided by the spiral pipe 191 and the connecting pipe 192 to enter the inner cavity of the connecting pipe 13 in a spiral path, and forms a horizontal leftward spiral airflow inside the connecting pipe 13. Under its own centrifugal force, the spiral airflow begins to enter the interior of the placement slot 16, thereby increasing the contact area between the positive pressure airflow and the heating wire 14, making the heating of the positive pressure airflow more efficient. At the same time, it helps to remove the dust on the surface of the heating wire 14 located in the inner cavity of the placement slot 16.

[0030] Among them, there are two spiral components 19, which are circumferentially and equally spaced inside the connecting pipe 13; like Figure 5 , Figure 6 As shown, the two sets of connecting pipes 192 are centrally symmetrically distributed. The positive pressure airflow ejected from one end of the connecting pipe 13 can interact with each other and form a positive pressure spiral airflow that moves horizontally to the left. Under its own centrifugal force, the positive pressure spiral airflow begins to enter the interior of the placement slot 16, thereby increasing the contact area between the positive pressure airflow and the heating wire 14, making the heating of the positive pressure airflow more efficient. At the same time, it helps to remove the dust on the surface of the heating wire 14 located in the inner cavity of the placement slot 16. The airflow can also enter the connecting pipe 11 through the through slot 17, accelerating the heat exchange rate of the airflow.

[0031] Among them, the inner diameter of both ends of the second connecting pipe 12 is smaller than the inner diameter of the placement groove 16, and the inner diameter of the third connecting pipe 13 is equal to that of the first connecting pipe 11, and is greater than the inner diameter of both ends of the third connecting pipe 13. like Figure 2 As shown, when the positive pressure airflow enters the connecting pipe 12 from the connecting pipe 3 13, the airflow speed increases due to the smaller cross-sectional area, thereby accelerating the air convection heat transfer speed on the surface of the heating wire 14 and accelerating the temperature rise of the positive pressure airflow.

[0032] Working principle: When this device is working: First, as follows... Figure 1 , Figure 4 As shown, move pipe 1 close to the bottom of one end of the detection frame 2 to the detection position, turn on the supplementary light 5 to provide illumination for the detection target, as shown. Figure 2 As shown, the image of the target is transmitted to the observation tube 8 after being reflected twice by reflector 3 and reflector 7, so as to achieve the purpose of visual inspection. Then, as Figures 2-3As shown, in embodiment 1 of this device, during operation: the positive pressure source 10 is turned on, and the fan 104 generates a positive pressure airflow to the left after startup. The filter screen 103 is responsible for filtering the air entering the fixed cylinder 101. The positive pressure airflow directly enters the inner cavity of the observation frame 6 from the right side, and enters the connecting pipe 13 through the gap between the observation frame 6 and the second reflector 7. Then, it enters the interior of the detection frame 2 through the second connecting pipe 12 and the first connecting pipe 11 in sequence, continuously blowing and cleaning the surface of the first reflector 3. At the same time, the positive pressure airflow is discharged upward through the opening 4. The compressed airflow prevents dust from entering the opening 4 and the detection frame 2 at the detection area, thus affecting the reflection efficiency of the reflector 3. When the humidity of the detection environment is high, the heating wire 14 is energized and heated, thereby heating the heat exchange component 18 as a whole. The positive pressure airflow from the connecting pipe 3 13 increases in temperature after passing through the heating wire 14 and the heat exchange component 18, thereby heating the surface of the reflector 3 and keeping the reflector 3 dry. The surface of the reflector 2 7 is also reduced in probability of fogging by the continuous airflow passing over its surface. Finally, as Figures 5-7 As shown, in the second embodiment of this device, when it is in operation: at this time, the right side of the observation frame 6 is blocked and isolated from the positive pressure source 10. The positive pressure inside the positive pressure source 10 enters the left side of the inner cavity of the connecting pipe 13 directly through the spiral tube 191 and the connecting tube 192. Since the connecting tube 192 is spirally distributed, the positive pressure airflow entering the connecting pipe 13 along its opening will also move in a spiral motion and directly enter the interior of the placement slot 16 under centrifugal force, directly contacting and exchanging heat with the outer surface of the heating wire 14, thereby improving the heat exchange efficiency of the positive pressure airflow.

[0033] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A multifunctional inspection mirror for building engineering inspection, comprising a pipe (1), wherein the pipe (1) is composed of a first connecting pipe (11), a second connecting pipe (12), and a third connecting pipe (13), wherein an inspection frame (2) is installed at the left end of the first connecting pipe (11), and an observation frame (6) is installed at the right end of the third connecting pipe (13), characterized in that, The interior of the second connecting pipe (12) is provided with a placement groove (16), and the interior of the placement groove (16) is provided with a heating wire (14). The interior of the detection frame (2) is provided with a reflector (3), and the interior of the observation frame (6) is provided with a reflector (7). The right side of the observation frame (6) is provided with a positive pressure source (10). The joint of the first connecting pipe (11) and the third connecting pipe (13) is provided with a through groove (17). The interior of the through groove (17) is fixedly installed with a heat exchange component (18). The heat exchange component (18) is integrally welded from a heat-conducting plate (181), a heat-conducting plate (182), and a heat-conducting plate (183). The heat-conducting plate (183) is fixedly connected to the second connecting pipe (12).

2. The multifunctional inspection mirror for building engineering inspection according to claim 1, characterized in that, The top of the detection frame (2) is fixedly connected to an opening (4), and a supplementary light (5) is installed on the outer edge of the top of the opening (4). The top of the observation frame (6) is fixedly installed with an observation tube (8), and a buffer sleeve (9) is fitted on the top of the observation tube (8).

3. The multifunctional inspection mirror for building engineering inspection according to claim 2, characterized in that, A protective sleeve (15) with the same number and number of through slots (17) is fixedly connected between the outer sides of the first connecting pipe (11) and the second connecting pipe (12). The second heat-conducting plate (182) is located in the protective sleeve (15). The first heat-conducting plate (181) is made of VC heat spreader or brass.

4. The multifunctional inspection mirror for building engineering inspection according to claim 3, characterized in that, The positive pressure source (10) includes a fixed cylinder (101) fixedly installed on the right side of the observation frame (6). One end of the fixed cylinder (101) is connected to the observation frame (6), and the other end of the fixed cylinder (101) is provided with a limiting groove (102). A filter screen (103) is sealed inside the limiting groove (102), and a fan (104) is fixedly installed inside the fixed cylinder (101).

5. The multifunctional inspection mirror for building engineering inspection according to claim 4, characterized in that, The front and rear ends of the second reflector (7) are separated from the inner wall of the observation frame (6), and the buffer sleeve (9) is made of rubber block.

6. The multifunctional inspection mirror for building engineering inspection according to claim 3, characterized in that, Two sets of spiral components (19) are fixedly installed on the right side of the inner wall of the connecting pipe three (13). The spiral component (19) includes a connecting pipe (192) spirally wound around the inner wall of the connecting pipe three (13). One end of the connecting pipe (192) is open and communicates with the inner cavity of the connecting pipe three (13). The other end of the connecting pipe (192) passes through to the outside of the connecting pipe three (13) and is fixedly connected to a spiral pipe (191). One end of the spiral pipe (191) passes through the observation frame (6) to the right and communicates with the inside of the positive pressure source (10). The positive pressure source (10) is not connected to the observation frame (6).

7. The multifunctional inspection mirror for building engineering inspection according to claim 6, characterized in that, The number of the spiral components (19) is two, and the two spiral components (19) are circumferentially and equally distributed inside the connecting pipe three (13).

8. The multifunctional inspection mirror for building engineering inspection according to claim 1, characterized in that, The inner diameter of the two ends of the second connecting pipe (12) is less than the inner diameter of the placement groove (16). The inner diameter of the third connecting pipe (13) is equal to that of the first connecting pipe (11) and is greater than the inner diameter of the two ends of the third connecting pipe (13).