Air duct air heater inspection device

Abstract

The utility model discloses an air duct air heater inspection device which comprises an air duct, a heater is arranged in the air duct, an observation opening is formed in the side wall of the air duct, a mounting groove is formed in the outer ring of the observation opening, a threaded hole is formed in the end face of the mounting groove, and an edge ring assembly is connected into the mounting groove and composed of a first edge ring and a second edge ring. Through holes are formed in the first edge ring and the second edge ring, a first clamping groove and a second clamping groove are formed in the adjacent faces of the first edge ring and the second edge ring respectively, a transparent plate is clamped between the first clamping groove and the second clamping groove, a protruding ring is arranged on the face, adjacent to the installation groove, of the second edge ring, a groove is formed in the end face of the installation groove, and the protruding ring and the groove are matched in an embedded mode. The edge ring assembly is arranged in the mounting groove and used for clamping the transparent plate and fixing the transparent plate at the observation opening, on one hand, the working state of the heater in the air duct can be directly observed through the transparent plate, the abnormal state can be found in time, and the maintenance and management efficiency of the air heater in the air duct can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of application equipment in thermal power plants, and particularly relates to an inspection device for air heaters in air ducts. Background Art

[0002] A thermal power plant, abbreviated as a coal-fired power plant, is a factory that uses combustibles as fuel to produce electric energy. Its basic production process is as follows: the fuel heats water to generate steam during combustion, converting the chemical energy of the fuel into heat energy. The steam pressure drives the steam turbine to rotate, converting heat energy into mechanical energy. Then, the steam turbine drives the generator to rotate, converting mechanical energy into electric energy.

[0003] As the main air conveyance channel in a thermal power plant, the air duct is provided with heaters for heating the air inside. The problem encountered in practice is that in the existing air duct design, there is a lack of means to directly observe the state of the heaters inside the air duct. This results in maintenance personnel having to disassemble or open the air duct when inspecting the state of the heaters inside, which is cumbersome to operate. And for safety reasons, when the air duct needs to be opened for inspection, the air duct needs to be in a closed and safe state, causing a certain interference to the normal operation of the air duct. Summary of the Utility Model

[0004] This application proposes an inspection device for air heaters in air ducts, which is used to observe and inspect the operating state of air heaters in air ducts to improve the maintenance and management efficiency of air heaters.

[0005] To achieve the above object, the utility model provides the following technical solutions:

[0006] An inspection device for air heaters in air ducts includes an air duct. A heater is arranged inside the air duct. An observation port is formed on the side wall of the air duct. An installation groove is arranged on the outer ring of the observation port. Threaded holes are formed on the end face of the installation groove. A side ring assembly is connected inside the installation groove. The side ring assembly is composed of a first side ring and a second side ring. Through holes are formed on the first side ring and the second side ring. First clamping grooves and second clamping grooves are respectively arranged on the adjacent surfaces of the first side ring and the second side ring. A transparent plate is clamped between the first clamping groove and the second clamping groove. A convex ring is arranged on the adjacent surface of the second side ring and the installation groove. A groove is formed on the end face of the installation groove. The convex ring and the groove are nested and matched with each other.

[0007] In an embodiment of this application, a shaft sleeve is installed at the center of the transparent plate. A rotating shaft is arranged inside the shaft sleeve. One end of the rotating shaft inside the air duct is connected with a brush rod.

[0008] In an embodiment of this application, a one-way valve is arranged outside the air duct. The one-way valve is connected with a water spray pipe inside the air duct. The water spray port of the water spray pipe faces the transparent plate.

[0009] In one embodiment of the present application, a streamer is connected to one end of the rotating shaft inside the air duct.

[0010] In one embodiment of the present application, a grip is installed on the outer end face of the first side ring.

[0011] In one embodiment of the present application, a searchlight is installed on the outer end face of the first side ring.

[0012] In one embodiment of the present application, a protective cover is sleeved outside the side ring assembly.

[0013] In summary, the technical solution proposed in the present application includes the following beneficial technical effects: By opening an observation port on the side wall of the air duct, arranging an installation groove on the outer ring of the observation port, and providing a side ring assembly in the installation groove, the side ring assembly is used to clamp the transparent plate and fix the transparent plate at the observation port. On the one hand, the working state of the heater inside the air duct can be directly observed through the transparent plate, and abnormal states can be detected in a timely manner, which is beneficial to improving the maintenance and management efficiency of the air heater inside the air duct. On the other hand, the transparent plate plays a role of closing and isolating the observation port, preventing the high-temperature gas inside the air duct from leaking out and causing harm to the staff, which is beneficial to improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0015] Figure 1 Schematic three-dimensional structure diagram of the air duct air heater inspection device provided by an embodiment of the present application;

[0016] Figure 2 Schematic three-dimensional structure diagram of the air duct air heater inspection device provided by an embodiment of the present application;

[0017] Figure 3 Schematic assembly structure diagram of the air duct air heater inspection device provided by an embodiment of the present application;

[0018] Figure 4 Schematic structure diagram of the side ring assembly of the air duct air heater inspection device provided by an embodiment of the present application;

[0019] Figure 5 Schematic outer structure diagram of the air duct air heater inspection device provided by an embodiment of the present application;

[0020] Figure 6Schematic diagram of the inner structure of the air duct air heater inspection device provided by an embodiment of the present application;

[0021] Figure 7 Schematic three-dimensional structure diagram of the air duct air heater inspection device provided by an embodiment of the present application;

[0022] In the figure: air duct - 100, heater - 101;

[0023] Observation port - 1, installation groove - 11, groove - 112, threaded hole - 111;

[0024] Side ring assembly - 2, first side ring - 21, first card slot - 211, second side ring - 22, second card slot - 221, convex ring - 222;

[0025] Through hole - 3;

[0026] Transparent plate - 4, bushing - 41, rotating shaft - 411, brush rod - 412;

[0027] One-way valve - 5, water spray pipe - 51;

[0028] Ribbon - 6;

[0029] Grip - 7;

[0030] Searchlight - 8;

[0031] Protective cover - 9. Detailed implementation manners

[0032] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts also belong to the scope of protection of the present application.

[0033] It should be noted that in the description of the present application, the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0034] In this application, the terms "installation", "connection", and "linkage" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] In the embodiments of this application, words such as "exemplary" or "for example" are used to represent examples, illustrations, or explanations. Any embodiment or design solution described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Exactly, using words such as "exemplary" or "for example" aims to present relevant concepts in a specific manner.

[0036] An air duct air heater inspection device provided in this embodiment is shown in Figures 1-7 the figure, and includes an air duct 100. A heater 101 is arranged in the air duct 100. An observation port 1 is opened on the side wall of the air duct 100. An installation groove 11 is arranged on the outer ring of the observation port 1. A threaded hole 111 is arranged on the end face of the installation groove 11. A side ring assembly 2 is connected in the installation groove 11. The side ring assembly 2 is composed of a first side ring 21 and a second side ring 22. Through holes 3 are opened on the first side ring 21 and the second side ring 22. First clamping grooves 211 and second clamping grooves 221 are respectively arranged on the adjacent surfaces of the first side ring 21 and the second side ring 22. A transparent plate 4 is clamped between the first clamping groove 211 and the second clamping groove 221. A convex ring 222 is arranged on the adjacent surface of the second side ring 22 and the installation groove 11. A groove 112 is opened on the end face of the installation groove 11. The groove 112 and the convex ring 222 are nested and matched with each other.

[0037] In the above embodiments, an observation port 1 is provided on the side wall of the air duct 100 for observing the situation inside the air duct 100 in real time. An installation groove 11 is provided on the outer ring of the observation port 1 for connecting the side ring assembly 2. The side ring assembly 2 is composed of an adjacent first side ring 21 and a second side ring 22. First card slots 211 and second card slots 221 are respectively provided on the adjacent surfaces of the first side ring 21 and the second side ring 22. The card slots are used to accommodate and place the transparent plate 4. The first side ring 21 and the second side ring 22 are fitted together to clamp the transparent plate 4 between the first card slot 211 and the second card slot 221 for limiting and fixing. In addition, a convex ring 222 is provided on the adjacent surface of the second side ring 22 and the installation groove 11. A groove 112 is provided on the end surface of the installation groove 11 for nested cooperation with the convex ring 222. On the one hand, when the side ring assembly 2 is placed into the installation groove 11, the convex ring 222 can be snapped into the groove 112 to play a positioning role and improve the convenience of installation. On the other hand, the convex ring 222 and the groove 112 are engaged to increase the contact area between the side ring assembly 2 and the end surface of the installation groove 11, thereby benefiting to improve the stability and sealing performance of the side ring assembly 2 and the installation groove 11. Further, the side ring assembly 2 is placed in the installation groove 11. Bolts pass through through holes 3 provided on the first side ring 21 and the second side ring 22, and then the bolts are screwed into threaded holes 111 of the installation groove 11. By the cooperation of the bolts and the threaded holes 111, the side ring assembly 2 and the installation groove 11 are detachably connected. When it is necessary to repair the heater 101 inside the air duct 100, the bolts can be removed, the side ring assembly 2 and the fixed transparent plate 4 can be removed, and the side ring assembly 2 can be installed after the repair is completed, which is beneficial to improve the flexibility of the inspection device. The side ring assembly 2 is used to clamp the transparent plate 4 and fix the transparent plate 4 at the observation port 1. On the one hand, the working state of the heater 101 inside the air duct 100 can be directly observed through the transparent plate 4, and abnormal states can be detected in time, which is beneficial to improve the maintenance and management efficiency of the air heater 101 inside the air duct 100. On the other hand, the transparent plate 4 plays a role of closing and isolating the observation port 1 to prevent the high-temperature gas inside the air duct 100 from leaking out and causing harm to the staff, which is beneficial to improve safety.

[0038] In an embodiment of the present application, referring to Figure 5 As shown, a bushing 41 is installed at the center of the transparent plate 4. A rotating shaft 411 is provided inside the bushing 41. One end of the rotating shaft 411 inside the air duct 100 is connected to a brush rod 412.

[0039] In the above embodiment, during the circulation of the air in the air duct 100, dust will be mixed and adhered to the inner surface of the transparent plate 4. The adhered dust will block the observation field of view, and it is difficult to clean the inner surface of the transparent plate 4. By rotating the outer end of the rotatable rotating shaft 411, the inner end of the rotating shaft 411 is driven to rotate, and then the brush rod 412 is driven to rotate on the inner surface of the transparent plate 4 to sweep away the dust, so as to better observe the internal situation of the air duct 100.

[0040] In an embodiment of the present application, refer to Figure 5 As shown, a one-way valve 5 is provided outside the air duct 100. The one-way valve 5 is connected to a water spray pipe 51 inside the air duct 100, and the water spray port of the water spray pipe 51 faces the transparent plate 4.

[0041] In the above embodiment, when the dirt adhered to the inner surface of the transparent plate 4 is difficult to clean with the brush rod 412, the cleaning liquid can be injected into the water spray pipe 51 through the one-way valve 5. The cleaning liquid rushes towards the inner side of the transparent plate 4 through the water spray port of the water spray pipe 51, and then cooperates with the brush rod 412 for scrubbing, which is beneficial to improving the cleaning effect of the dirt adhered to the inner side of the transparent plate 4.

[0042] In an embodiment of the present application, refer to Figure 6 As shown, one end of the rotating shaft 411 inside the air duct 100 is connected with a ribbon 6.

[0043] In the above embodiment, the airflow in the air duct 100 can blow the ribbon 6 to swing. The flow direction of the airflow in the air duct 100 can be judged by the swinging direction of the ribbon 6, so that the staff can more intuitively observe and judge the airflow direction in the air duct 100.

[0044] In an embodiment of the present application, refer to Figure 5 As shown, a handle 7 is installed on the outer end face of the first side ring 21.

[0045] In the above embodiment, when disassembling and installing the side ring assembly 2, the handle 7 can be used to provide a holding point, improve the holding stability of the side ring assembly 2, and prevent the accessories from falling during disassembly and installation.

[0046] In an embodiment of the present application, refer to Figure 5 As shown, a searchlight 8 is installed on the outer end face of the first side ring 21.

[0047] In the above embodiment, in some cases, the observation port 1 may be located in a relatively concealed or dimly lit position. By turning on the searchlight 8, the light of the searchlight 8 can expand the inspection field of view of the operator or staff, which is beneficial to more detailed observation and inspection of the target area.

[0048] In an embodiment of the present application, refer to Figure 7 As shown, a protective cover 9 is sleeved outside the side ring assembly 2.

[0049] In the above embodiment, the protective cover 9 is used to cover the outer side of the side ring assembly 2 to protect the transparent plate 4, prevent the transparent plate 4 from being broken by falling equipment or parts, and further prevent the air flow in the air duct 100 from leaking, which helps to improve safety.

[0050] During the actual use of the present application: an installation groove 11 is provided at the outer ring of the observation port 1, and the installation groove 11 is used to connect the side ring assembly 2. The side ring assembly 2 is composed of an adjacent first side ring 21 and a second side ring 22. First card slots 211 and second card slots 221 are respectively provided on the adjacent surfaces of the first side ring 21 and the second side ring 22. The card slots are used to accommodate and place the transparent plate 4. Preferably, the transparent plate 4 is tempered glass. The first side ring 21 and the second side ring 22 are fitted together to clamp the transparent plate 4 between the first card slot 211 and the second card slot 221 for limit fixation. Preferably, sealant can be filled in the card slot to improve the stability and sealing performance of the card slot for fixing the transparent plate 4. In addition, a convex ring 222 is provided on the adjacent surface of the second side ring 22 and the installation groove 11, and a groove 112 is provided at the end face of the installation groove 11. The groove 112 is used to be nested and matched with the convex ring 222. Further, the side ring assembly 2 is placed in the installation groove 11, the through holes 3 on the first side ring 21 and the through holes 3 on the second side ring 22 are aligned respectively, and then bolts are passed through the through holes 3 provided on the first side ring 21 and the second side ring 22, and then the bolts are screwed into the threaded holes 111 of the installation groove 11. By the cooperation of the bolts and the threaded holes 111, the side ring assembly 2 is detachably connected to the installation groove 11.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A duct air heater inspection device, comprising an duct (100), wherein a heater (101) is arranged in the duct (100), characterized in that: The side wall of the air duct (100) is provided with an observation port (1), the outer ring of the observation port (1) is provided with a mounting groove (11), the end surface of the mounting groove (11) is provided with a threaded hole (111), the mounting groove (11) is connected with a side ring assembly (2), the side ring assembly (2) is composed of a first side ring (21) and a second side ring (22), the first side ring (21) and the second side ring (22) are provided with through holes (3), the first side ring (2 1) A first card slot (211) and a second card slot (221) are respectively arranged on adjacent surfaces of the second edge ring (22); a transparent plate (4) is clamped between the first card slot (211) and the second card slot (221); a convex ring (222) is arranged on adjacent surfaces of the second edge ring (22) and the mounting groove (11); a groove (112) is provided on the end surface of the mounting groove (11); and the convex ring (222) and the groove (112) are nested and matched.

2. The duct air heater inspection device according to claim 1, characterized in that: A shaft sleeve (41) is installed at the center of the transparent plate (4), a rotating shaft (411) is arranged inside the shaft sleeve (41), and one end of the rotating shaft (411) inside the air duct (100) is connected to a brush rod (412).

3. The duct air heater inspection device according to claim 2, characterized in that: A one-way valve (5) is arranged outside the air duct (100), and the one-way valve (5) is connected to a water spray pipe (51) inside the air duct (100), and the water spray port of the water spray pipe (51) faces the transparent plate (4).

4. The duct air heater inspection device according to claim 3, characterized in that: One end of the rotating shaft (411) in the air duct (100) is connected to a streamer (6).

5. The duct air heater inspection device according to claim 1, characterized in that: A handle (7) is mounted on the outer end surface of the first edge ring (21).

6. The duct air heater inspection device according to claim 1, characterized in that: A searchlight (8) is installed on the outer end surface of the first edge ring (21).

7. The duct air heater inspection device according to any one of claims 1 to 6, characterized in that: The outer side of the edge ring assembly (2) is provided with a protective cover (9).

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