Observation window and cooling air grid

Abstract

The utility model relates to an observation window and a cooling air grid. The observation window comprises a mounting frame, a window body and a lifting device, the mounting frame is provided with a window opening, and the window body is movably connected to the window opening. The lifting device comprises a driving assembly and a lifting piece, one end of the lifting piece is in driving connection with the driving assembly, the other end is connected with the window body, and the driving assembly drives the window body to ascend or descend to open or close the window. According to the observation window and the cooling air grid, lifting of the window body is achieved through the lifting device, the height is adjusted according to actual requirements, the risk that an operator collides with the head in the using process is reduced, and the using requirements of people of different heights are better met. Compared with an opening and closing type observation window, the lifting type observation window has the advantages that the requirement for site space is low, the space utilization rate is effectively increased, and the investment cost of an enterprise is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tempered glass production equipment, in particular to an observation window and a cooling air grid. BACKGROUND

[0002] An observation window is arranged on the cooling air grid of a glass heating furnace, which is used to provide convenience for the operator to observe the tempering state of the glass in real time, so as to adjust the flatness of the next furnace glass in time, thereby effectively improving the glass quality and stability. At the same time, the observation window also needs to have the function of not hindering the rapid removal of the glass by the cooling air grid in the emergency discharge state. Therefore, the observation window is designed to be movable, and the hinge-connected opening and closing structure is commonly used at present.

[0003] The existing observation window is easy to hit the head during use for the operator with a higher height, and the experience is not good. This design difference cannot meet the market demand of personnel with different height characteristics, which limits the universality and market adaptability of the product to some extent. Secondly, the opening mode of the opening and closing type observation window determines that it has certain requirements for the installation site space, and the site cannot be too narrow. This not only reduces the space utilization rate, but also means that the enterprise needs to invest higher cost in site leasing or construction, which affects the overall economic benefit. CONTENT OF THE INVENTION

[0004] Therefore, an observation window and a cooling air grid are provided to solve the problems of insufficient opening and closing height of the existing opening and closing type observation window, high requirement for the site, and low space utilization rate.

[0005] An embodiment of the first aspect of the present application provides an observation window, comprising:

[0006] a mounting frame, the mounting frame being provided with a window;

[0007] a window body, the window body being movably connected to the window;

[0008] a lifting device, the lifting device comprising a driving assembly and a lifting piece, one end of the lifting piece being drivingly connected to the driving assembly, and the other end of the lifting piece being connected to the window body, the driving assembly driving the window body to ascend or descend to open or close the window.

[0009] In one embodiment, the driving assembly comprises:

[0010] a driving motor, the driving motor being mounted on the mounting frame;

[0011] a speed reducer, the speed reducer being mounted on the mounting frame, one end of the speed reducer being drivingly connected to the driving motor;

[0012] A transmission unit comprises a transmission shaft and a sprocket connected to the transmission shaft, the other end of the speed reducer is drivingly connected to the transmission shaft, a chain is connected to the sprocket, and the chain is connected to the lifting member.

[0013] In one embodiment, the lifting member comprises:

[0014] An orthodontic adjustment screw is fixedly connected to the chain;

[0015] A reverse tooth adjustment screw is fixedly connected to the window body;

[0016] A forward and reverse tooth adjustment sleeve is provided with a forward tooth thread and a reverse tooth thread at both ends inside, the forward tooth thread is threadedly connected to the forward tooth adjustment screw, and the reverse tooth thread is threadedly connected to the reverse tooth adjustment screw;

[0017] A first nut is threadedly connected to the forward tooth adjustment screw and abuts against the end of the forward and reverse tooth adjustment sleeve;

[0018] A second nut is threadedly connected to the reverse tooth adjustment screw and abuts against the end of the forward and reverse tooth adjustment sleeve.

[0019] In one embodiment, the observation window further comprises a connecting assembly connecting the lifting member and the window body.

[0020] In one embodiment, the connecting assembly comprises:

[0021] A first frame body is fixedly connected to the reverse tooth adjustment screw;

[0022] A second frame body is fixedly connected to the first frame body at one end and to the window body at the other end.

[0023] In one embodiment, the observation window further comprises a lifting guide assembly, which comprises:

[0024] A guide pipe is fixedly arranged on the mounting frame along the lifting direction of the window body;

[0025] A guide wheel is rotatably connected to the first frame body or the second frame body, the guide wheel is provided with a guide groove, and the guide groove is matched with the guide pipe, so that the guide wheel rolls on the guide pipe when the window body is lifted.

[0026] In one embodiment, the guide wheel comprises:

[0027] A first guide wheel is rotatably connected to the first frame body.

[0028] A second guide wheel is rotatably connected to the second frame body;

[0029] The first guide wheel and the second guide wheel are respectively arranged on two sides of the guide pipe.

[0030] In one of the embodiments, at least one of the first guide wheel and the second guide wheel is connected with an adjusting unit for adjusting the distance between the first guide wheel and / or the second guide wheel and the guide pipe.

[0031] In one of the embodiments, the adjusting unit comprises:

[0032] An adjusting mounting hole is arranged on the second frame body;

[0033] An adjusting rotating shaft is rotatably connected to the second guide wheel, and the adjusting rotating shaft is connected to the adjusting mounting hole and can move in the adjusting mounting hole to adjust the distance between the second guide wheel and the guide pipe.

[0034] An adjusting fixing member is connected between the second frame body and the adjusting rotating shaft to fix the moving adjusting rotating shaft.

[0035] The second aspect of the embodiments of the present application provides a cooling air grid comprising the observation window of any of the above embodiments.

[0036] According to the observation window and the cooling air grid of the embodiments of the present application, the window body is lifted by the lifting device, the height is adjusted according to the actual demand, the risk of the operator bumping the head during use is reduced, and the use demand of different height populations is better considered; compared with the opening and closing type observation window, the lifting type observation window of the present application has lower requirement on the site space, effectively improves the space utilization rate, and reduces the investment cost of the enterprise. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 FIG. 6 is a structural schematic view of the window body closing the window in the observation window of one embodiment of the present application.

[0038] Figure 2 FIG. 7 is a structural schematic view of the window body opening the window in the observation window of one embodiment of the present application.

[0039] Figure 3 FIG. 8 is a structural schematic view of the driving assembly in the observation window of one embodiment of the present application.

[0040] Figure 4 FIG. 9 is a partial sectional view of the observation window of one embodiment of the present application.

[0041] Figure 5Fig. 1 is a structural schematic view of a regulating unit embodied in an observation window according to an embodiment of the present application.

[0042] Reference signs:

[0043] 1, mounting frame; 11, window;

[0044] 2, window body; 21, glass; 22, aluminum profile;

[0045] 3, driving assembly; 31, driving motor; 32, speed reducer; 33, transmission unit; 331, transmission shaft; 3311, first bearing; 332, chain wheel; 333, chain;

[0046] 4, lifting piece; 41, orthodontic adjusting screw; 42, reverse tooth adjusting screw; 43, orthodontic and reverse tooth adjusting sleeve; 44, first nut; 45, second nut;

[0047] 5, connecting assembly; 51, first frame body; 52, second frame body; 53, third frame body; 54, connecting seat;

[0048] 6, guiding assembly; 61, guiding pipe; 611, fixing seat; 612, fixing plate; 62, first guiding wheel; 621, guiding groove; 622, second bearing; 623, connecting shaft; 624, pressing sleeve; 63, second guiding wheel;

[0049] 7, regulating unit; 71, regulating mounting hole; 72, regulating rotating shaft; 73, regulating fixing piece; 731, regulating plate; 732, regulating fixing pin shaft. DETAILED DESCRIPTION

[0050] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, a lot of specific details are set forth in order to fully understand the present application. However, the present application can be implemented in many different ways other than those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0051] In the description of the application, it should be understood that, if there are these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0052] In addition, if there are these terms "first", "second", these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, if there are terms "a plurality of", the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0053] In this application, unless otherwise explicitly specified and limited, if there are terms "installation", "connection", "connection", "fixing" and the like, these terms should be broadly understood. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0054] In this application, unless otherwise explicitly specified and limited, if there are similar descriptions such as "first feature on" or "below" the second feature, the meaning can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0055] It should be noted that if an element is referred to as being "fixed" or "set" on another element, it can be directly on the other element or there can be an intervening element. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element. If present, the terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar terms as used herein are for purposes of description only and are not meant to be limiting.

[0056] Referring to Figure 1 and Figure 2 , Figure 1 FIG. 1 is a structural schematic diagram of a window body 2 closing a window 11 in an observation window according to an embodiment of the present application. Figure 2 FIG. 2 is a structural schematic diagram of the window body 2 opening the window 11 in the observation window according to an embodiment of the present application. At least one embodiment of the present application provides an observation window, which includes a mounting frame 1, a window body 2, and a lifting device. The mounting frame 1 is provided with a window 11, and the window body 2 is movably connected to the window 11. The lifting device includes a driving assembly 3 and a lifting piece 4. One end of the lifting piece 4 is drivingly connected to the driving assembly 3, and the other end is connected to the window body 2. The driving assembly 3 drives the window body 2 to ascend or descend to open or close the window 11.

[0057] According to the observation window of the embodiment of the present application, the lifting device is used to realize the ascending and descending of the window body 2. The height can be adjusted according to actual needs, which reduces the risk of bumping the head of the operator during use and better meets the use needs of people of different heights. Compared with the open-close type observation window, the lifting type observation window of the present application has lower requirements for the space, effectively improves the space utilization, and reduces the investment cost of the enterprise.

[0058] Referring to Figure 2 In some embodiments, the window body 2 is composed of glass 21 and aluminum profile 22 and is installed on the lifting piece 4 in a fixed manner. The combination of the aluminum profile 22 and the glass 21 can effectively reduce the overall weight of the observation window, facilitate installation and transportation, and improve work efficiency.

[0059] Referring to Figure 2 and Figure 3 , Figure 3A schematic view of the driving assembly 3 in the observation window of an embodiment of the present application is shown. In an embodiment, the driving assembly 3 comprises a driving motor 31, a speed reducer 32 and a transmission unit 33. The driving motor 31 is mounted on the mounting frame 1. The speed reducer 32 is mounted on the mounting frame 1, and one end of the speed reducer 32 is drivingly connected with the driving motor 31. The transmission unit 33 comprises a transmission shaft 331 and a sprocket 332 connected to the transmission shaft 331. The other end of the speed reducer 32 is drivingly connected with the transmission shaft 331. A chain 333 is connected to the sprocket 332, and the chain 333 is connected with the lifting member 4. Specifically, most of the driving assembly 3 is mounted on the top of the mounting frame 1, and a first bearing 3311 is connected between the transmission shaft 331 and the mounting frame 1. The driving motor 31 is drivingly connected with the transmission shaft 331 through the speed reducer 32, and drives the transmission shaft 331 to rotate. The sprocket 332 is connected to the transmission shaft 331, and one end of the chain 333 is fixed to the sprocket 332 and engaged with the sprocket 332. With the rotation of the transmission shaft 331, the sprocket 332 drives the chain 333 to rotate, and the lifting member 4 connected to the other end of the chain 333 is lifted, so that the observation window mounted on the lifting member 4 is finally lifted.

[0060] Referring to Figure 4 , Figure 4 A partial sectional view of the observation window of an embodiment of the present application is shown. In an embodiment, the lifting member 4 comprises a right-handed adjusting screw 41, a left-handed adjusting screw 42, a right-left-handed adjusting sleeve 43, a first nut 44 and a second nut 45. The right-handed adjusting screw 41 is fixedly connected with the chain 333, and the left-handed adjusting screw 42 is fixedly connected with the window body 2. The right-left-handed adjusting sleeve 43 has right-handed threads and left-handed threads at both ends inside. The right-handed threads are threadedly connected with the right-handed adjusting screw 41, and the left-handed threads are threadedly connected with the left-handed adjusting screw 42. The first nut 44 is threadedly connected to the right-handed adjusting screw 41, and abuts against one end of the right-left-handed adjusting sleeve 43. The second nut 45 is threadedly connected to the left-handed adjusting screw 42, and abuts against the other end of the right-left-handed adjusting sleeve 43.

[0061] Specifically, the lifting member 4 is used to accurately adjust the tension of the chain 333 and the height of the observation window. The right-handed adjusting screw 41 is connected with the bottom end of the chain 333, and is connected with the right-left-handed adjusting sleeve 43. The first nut 44 is arranged on the right-handed adjusting screw 41, and the first nut 44 is a right-handed nut. The right-left-handed adjusting sleeve 43 has right-handed threads on one side of the inner wall, and left-handed threads on the other side of the inner wall. The right-handed threads are matched with the right-handed adjusting screw 41, and the left-handed threads are matched with the left-handed adjusting screw 42. The second nut 45 is arranged on the left-handed adjusting screw 42, and the second nut 45 is a left-handed nut. By rotating the right-left-handed adjusting sleeve 43, the distance between the right-handed adjusting screw 41 and the left-handed adjusting screw 42 can be adjusted, so that the tension of the chain 333 can be adjusted. The tension of the chain 333 can be accurately adjusted by the lifting member 4, so that the stability and reliability of the lifting of the observation window are ensured, and the service life of the equipment is prolonged.

[0062] Referring to Figure 3 In one embodiment, the observation window further comprises a connecting assembly 5 connecting the lifting member 4 and the window body 2. The connecting assembly 5 is used to connect the lifting member 4 and the window body 2, so that the window body 2 moves more stably.

[0063] Referring to Figure 4 In one embodiment, the connecting assembly 5 comprises a first frame body 51 and a second frame body 52, the first frame body 51 is fixedly connected with the reverse tooth adjusting screw 42. The second frame body 52 is fixedly connected with the first frame body 51 at one end and fixedly connected with the window body 2 at the other end.

[0064] Specifically, in some embodiments, the first frame body 51 is vertically arranged, the second frame body 52 is horizontally arranged, the bottom end of the first frame body 51 is fixedly connected with one side end of the second frame body 52, forming an L-shaped frame structure. In order to improve the stability of the connecting assembly 5, a third frame body 53 is further connected between the first frame body 51 and the second frame body 52. The third frame body 53 is arranged obliquely, one end of which is fixedly connected with the first frame body 51, and the other end of which is fixedly connected with the second frame body 52.

[0065] In some embodiments, a connecting seat 54 is arranged between the second frame body 52 and the window body 2. The connecting seat 54 is L-shaped, one end of which is fixedly connected with the second frame body 52, and the other end of which is fixedly connected with the outer frame of the aluminum profile 22 of the window body 2, improving the connection stability of the window body 2.

[0066] Referring to Figure 4 In one embodiment, the observation window further comprises a lifting guide assembly 6, which provides a guide function for the lifting of the observation window, ensuring the stability and accuracy of the observation window during lifting.

[0067] Specifically, the lifting guide assembly 6 comprises a guide pipe 61 and a guide wheel. The guide pipe 61 is fixedly arranged on the mounting frame 1 along the lifting direction of the window body 2. The guide wheel is rotatably connected to the first frame body 51 and / or the second frame body 52, and is provided with a guide groove 621 which cooperates with the guide pipe 61. When the window body 2 is lifted, the guide wheel rolls on the guide pipe 61. The guide pipe 61 is vertically arranged and fixedly connected with the mounting frame 1 through the fixing seat 611 and the fixing plate 612 arranged at both ends of the guide pipe 61, providing a guide for the lifting of the lifting window. The guide wheel is rotatably connected to the connecting assembly 5, which can be connected to the first frame body 51 or the second frame body 52, or multiple guide wheels can be provided and connected to the first frame body 51 and the second frame body 52 respectively.

[0068] Referring to Figure 4 and Figure 5 , Figure 5A structural schematic diagram of the adjusting unit 7 in the observation window of an embodiment of the present application is shown. In an embodiment, the guide wheels include a first guide wheel 62 and a second guide wheel 63, the first guide wheel 62 being rotationally connected to the first frame body 51. The second guide wheel 63 is rotationally connected to the second frame body 52. The first guide wheel 62 and the second guide wheel 63 are respectively arranged on two sides of the guide pipe 61. The first guide wheel 62 and the second guide wheel 63 are respectively connected to the guide pipe 61 through a guide groove 621 on two sides of the guide pipe 61, achieving a structure similar to that of the occlusal guide pipe 61, so that the window body 2 stably rises and falls along the guide pipe 61 when rising and falling.

[0069] Specifically, the first frame body 51 is fixedly connected with a connecting shaft 623 through a pressing sleeve 624, and the first guide wheel 62 is rotationally connected to the connecting shaft 623 through a second bearing 622.

[0070] In an embodiment, at least one of the first guide wheel 62 and the second guide wheel 63 is connected with the adjusting unit 7, which is used to adjust the position of the first guide wheel 62 and / or the second guide wheel 63 relative to the guide pipe 61. Because the first guide wheel 62 and the second guide wheel 63 are respectively occluded on two sides of the guide pipe 61, the distance between the first guide wheel 62 and / or the second guide wheel 63 and the guide pipe 61 can be adjusted through the adjusting unit 7, so as to correct the machining error and the assembly error, and improve the smoothness and stability of the equipment operation.

[0071] Referring to Figure 5 In an embodiment, the second guide wheel 63 is connected with the adjusting unit 7. Specifically, the adjusting unit 7 includes an adjusting mounting hole 71, an adjusting rotating shaft 72, and an adjusting fixing member 73. The adjusting mounting hole 71 is formed in the second frame body 52. The second guide wheel 63 is rotationally connected to the adjusting rotating shaft 72, the adjusting rotating shaft 72 is connected in the adjusting mounting hole 71 and can move in the adjusting mounting hole 71 to adjust the distance between the second guide wheel 63 and the guide pipe 61. The adjusting fixing member 73 connects the second frame body 52 and the adjusting rotating shaft 72, and is used to fix the moved adjusting rotating shaft 72.

[0072] Specifically, in some embodiments, a bearing (not shown in the figure) is connected between the second guide wheel 63 and the adjusting rotating shaft 72. The adjusting fixing member 73 includes an adjusting plate 731 and an adjusting fixing pin shaft 732. The adjusting plate 731 is fixed to the side wall of the second frame body 52, and the adjusting fixing pin shaft 732 passes through the adjusting rotating shaft 72 and the adjusting plate 731 to achieve shaft pin fixing.

[0073] At least one embodiment of the present application proposes a cooling air grid, which includes the observation window of any one of the above embodiments.

[0074] The observation window and the cooling air grid in the embodiments of the present application are used when the glass 21 tempering state in the cooling air grid needs to be observed, the driving assembly 3 is started, the driving motor 31 drives the sprocket 332 to rotate, the sprocket 332 drives the lifting piece 4 to rise through the chain 333, the window body 2 of the observation window rises to a suitable observation height, and the operator can observe through the observation window; when the observation is over or the glass 21 needs to be taken out in an emergency, the driving motor 31 is started to make the lifting piece 4 descend, and the window body 2 of the observation window descends, so as to avoid hindering the cooling air grid from removing the glass 21.

[0075] During use, if it is found that the window body 2 of the observation window does not rise and descend smoothly or the tension of the chain 333 is not suitable, the chain 333 can be adjusted by rotating the positive and negative tooth adjusting sleeve 43. The positive and negative tooth adjusting sleeve 43 is rotated clockwise or counterclockwise, the distance between the positive tooth adjusting screw 41 and the negative tooth adjusting screw 42 is changed, the tension of the chain 333 is adjusted, and the smoothness of the observation window rising and descending is ensured. If it is found that the window body 2 of the observation window does not rise and descend smoothly or is stuck, the distance between the second pressure roller and the guide pipe 61 can be adjusted by adjusting the fixing piece 73, the machining error and the assembly error are corrected, and the smoothness and stability of the equipment operation are improved.

[0076] The cooling air grid of the present application realizes the rising and descending of the window body 2 through the lifting device, the height is adjusted according to actual needs, the risk of the operator bumping the head during use is reduced, and the use needs of different height populations are better taken into account. Compared with the opening and closing type observation window, the lifting type observation window of the present application has lower requirements for the site space, effectively improves the space utilization rate, and reduces the investment cost of the enterprise.

[0077] The above embodiments only express several embodiments of the present application, the description is more specific and detailed, but it cannot be understood as limiting the patent application scope. It should be pointed out that, for ordinary skilled persons in the art, without departing from the concept of the present application, several modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A viewing window characterized by, The utility model relates to an observation window, including: mounting frame is provided with window; window body is movably connected to the window; lifting device, the lifting device includes drive assembly and lifting piece, one end of the lifting piece is drivenly connected with the drive assembly, the other end is connected with the window body, the drive assembly drives the window body to lift to open or close the window.

2. The viewing window of claim 1, wherein The drive assembly includes: drive motor, the drive motor is installed on the mounting frame; speed reducer, the speed reducer is installed on the mounting frame, one end of the speed reducer is drivenly connected with the drive motor; transmission unit, the transmission unit includes transmission shaft and sprocket connected on the transmission shaft, the other end of the speed reducer is drivenly connected with the transmission shaft, the sprocket is connected with chain, and the chain is connected with the lifting piece.

3. The viewing window of claim 2, wherein, The lifting piece includes: orthodontic adjusting screw, the orthodontic adjusting screw is fixedly connected with the chain; reverse tooth adjusting screw, the reverse tooth adjusting screw is fixedly connected with the window body; positive and negative tooth adjusting sleeve, the positive and negative tooth adjusting sleeve is provided with positive thread and reverse thread at both ends inside, the positive thread is screwed with the orthodontic adjusting screw, and the reverse thread is screwed with the reverse tooth adjusting screw; first nut, the first nut is screwed on the orthodontic adjusting screw, and abuts against the end of the positive and negative tooth adjusting sleeve; second nut, the second nut is screwed on the reverse tooth adjusting screw, and abuts against the end of the positive and negative tooth adjusting sleeve.

4. The viewing window of claim 3, wherein The observation window further includes a connecting assembly connecting the lifting piece and the window body.

5. The viewing window of claim 4, wherein, The connecting assembly includes: first frame body, the first frame body is fixedly connected with the reverse tooth adjusting screw; second frame body, one end of the second frame body is fixedly connected with the first frame body, and the other end is fixedly connected with the window body.

6. The viewing window of claim 5, wherein The observation window further includes a lifting guide assembly, which includes: guide pipe, the guide pipe is fixedly arranged on the mounting frame along the lifting direction of the window body; guide wheel, the guide wheel is rotatably connected to the first frame body and / or the second frame body, the guide wheel is provided with a guide groove, and the guide groove is matched with the guide pipe, when the window body lifts, the guide wheel rolls on the guide pipe.

7. The viewing window of claim 6, wherein The guide wheel includes: first guide wheel, the first guide wheel is rotatably connected with the first frame body; second guide wheel, the second guide wheel is rotatably connected with the second frame body; The first guide wheel and the second guide wheel are arranged on both sides of the guide pipe respectively.

8. The viewing window of claim 7, wherein, At least one of the first guide wheel and the second guide wheel is connected with an adjusting unit for adjusting the distance between the first guide wheel and / or the second guide wheel and the guide pipe.

9. The viewing window of claim 8, wherein, The adjusting unit includes: adjusting mounting hole, the adjusting mounting hole is formed in the second frame body; adjusting shaft, the second guide wheel is rotatably connected to the adjusting shaft, the adjusting shaft is connected in the adjusting mounting hole and can move in the adjusting mounting hole to adjust the distance between the second guide wheel and the guide pipe; An adjusting fixing member is connected with the second frame body and the adjusting rotating shaft, and is used for fixing the adjusting rotating shaft after moving.

10. A cooling air grid, characterized in that The observation window comprises any one of claims 1-9.

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