Sliding manhole door

Abstract

The invention discloses a sliding manhole door which comprises a movable door body matched with a manhole, a sliding guide piece matched with the movable door body is arranged on the outer side of the manhole, a locking piece is arranged on the movable door body, a locking block matched with the locking piece is arranged on the periphery of the manhole, and when the movable door body moves to a locking station, the sliding guide piece is matched with the movable door body. The movable door is guided to the position of the manhole, the locking piece and the locking block are locked in a matched mode, and closing and sealing of the movable door and the manhole are completed. The manhole door is driven to move through sliding, the locking piece and the locking block are matched for locking, a traditional bolt connection mode is not needed, the workload of maintainers is reduced, and the maintenance period of the whole equipment is shortened.

Description

Technical Field

[0001] The invention relates to the technical field of manhole doors, and in particular to a sliding manhole door. Background Art

[0002] A centrifugal fan is a general-purpose mechanical equipment for supplying or exhausting air. It can be widely used in all walks of life that require exhaust and supply of air. The operation of large industrial sites is inseparable from efficient and stable fan equipment. In order to achieve the factory's all-weather, non-stop working rhythm, the requirements for equipment are often very high. In order to ensure the stable operation of the fan, the maintenance of the fan is essential. However, as a centrifugal fan of large industrial equipment, the opening and closing of its heavy manhole door often becomes a necessary step for maintenance personnel. Usually, the maintenance doors of most fans on the market are connected to the main part of the casing with hinges, but the bolt connection method greatly increases the workload of maintenance personnel and delays the maintenance cycle of the entire equipment. Moreover, since the internal wind force of the centrifugal fan exerts a great pressure on the casing when it is working, the manhole door must be closed and sealed in place. At present, the manhole doors on the market all have the above-mentioned problems of increasing maintenance workload and maintenance cycle. Summary of the invention

[0003] The purpose of the present invention is to provide a sliding manhole door to solve the above-mentioned deficiencies and defects in the prior art.

[0004] The technical problem solved by the present invention can be achieved by adopting the following technical solutions:

[0005] A sliding manhole door comprises a moving door cooperating with a manhole, a sliding guide member cooperating with the moving door is arranged on the outer side of the manhole, a locking member is arranged on the moving door, and a locking block cooperating with the locking member is arranged on the outer periphery of the manhole. When the moving door moves to the locking position, the moving door is guided to the manhole position, and is locked by the locking member cooperating with the locking block, so that the moving door and the manhole are closed and sealed.

[0006] In a preferred embodiment of the present invention, four locking members are provided on the movable door, and the four locking members are respectively arranged on the upper part, the lower part and the two sides of the movable door, and four locking blocks cooperating with the four locking members are respectively provided on the outer periphery of the manhole.

[0007] In a preferred embodiment of the present invention, the central axes of the four locking members are arranged on the movable door, one end of each locking member is respectively connected to the multi-link structure, the other end of each locking member is a locking end cooperating with the locking block, and the multi-link structure is connected to the driving handle.

[0008] In a preferred embodiment of the present invention, the multi-link structure includes four links and four rotating blocks rotatably arranged on the movable door, the four rotating blocks are distributed on the four vertices of a square, each rotating block has a first connecting end and a second connecting end, the four rotating blocks are respectively a first rotating block, a second rotating block, a third rotating block, and a fourth rotating block, the four links are respectively a first link, a second link, a third link, and a fourth link, the two ends of the first link are rotatably connected to the first connecting end of the first rotating block and the second connecting end of the second rotating block, the two ends of the second link are respectively rotatably connected to the first connecting end of the second rotating block and the second connecting end of the third rotating block, the two ends of the third link are respectively rotatably connected to the first connecting end of the third rotating block and the second connecting end of the fourth rotating block, the two ends of the fourth link are respectively rotatably connected to the first connecting end of the fourth rotating block and the second connecting end of the first rotating block, one end of the four locking members is respectively slidably connected to the middle parts of the first link, the second link, the third link, and the fourth link, and one of the links is connected to the driving handle.

[0009] In a preferred embodiment of the present invention, the movable door comprises a movable frame slidably configured with the sliding guide member and a door body movably connected to the movable frame, and the locking member is arranged on the door body.

[0010] In a preferred embodiment of the present invention, the sliding guide member includes a pair of parallel vertical slide rails respectively arranged on the upper and lower parts of the outer side of the manhole, and the upper and lower parts of the movable frame are respectively slidably configured on the slide rails. The slide rails are also provided with closing path guide slide rails that cooperate with the door body.

[0011] In a preferred embodiment of the present invention, a position sensor is provided on the outer shell of the manhole, and when the movable door is guided to the manhole position and the closing and sealing is completed, the movable door triggers the position sensor, and the position sensor is connected to the control console.

[0012] In a preferred embodiment of the present invention, the locking end of each locking member is provided with a partial guiding slope.

[0013] In a preferred embodiment of the present invention, a double-layer sealing ring formed by a first sealing ring and a second sealing ring is provided on the outer edge of the manhole, and the double-layer sealing ring is separated by a partition. A third sealing ring is provided on the outer edge of the movable door facing the manhole. When the movable door and the manhole are closed and sealed, the partition presses the third sealing ring, and the groove edges on both sides of the third sealing ring press the first sealing ring and the second sealing ring to form a three-layer sealing structure.

[0014] In a preferred embodiment of the present invention, a pressure relief slope is provided on the inner edge of the manhole.

[0015] Due to the adoption of the above technical solution, the present invention utilizes sliding to drive the manhole door to move, and utilizes the locking member and the locking block to lock it, without the need to utilize the traditional bolt connection method, thereby reducing the workload of maintenance personnel and shortening the maintenance cycle of the entire equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural front view of an embodiment of the present invention (manhole door open state).

[0018] Figure 2 yes Figure 1 A partial enlarged stereogram of the .

[0019] Figure 3 yes Figure 1 AA section view.

[0020] Figure 4 It is a structural front view of an embodiment of the present invention (the state before the manhole door changes track).

[0021] Figure 5 yes Figure 4 A partial enlarged stereogram of the .

[0022] Figure 6 yes Figure 4 BB cross-sectional view.

[0023] Figure 7 It is a structural front view of an embodiment of the present invention (the state before the manhole door is aligned).

[0024] Figure 8 yes Figure 7 A partial enlarged stereogram of the .

[0025] Fig. 9 yes Figure 7 CC cross-sectional view.

[0026] Fig.10 It is a structural front view of an embodiment of the present invention (manhole door aligned state).

[0027] Fig.11 yes Fig.10 A partial enlarged stereogram of the .

[0028] Fig.12 yes Fig.10 DD cross-sectional view.

[0029] Fig.13 It is a structural front view of an embodiment of the present invention (manhole door in the closed state).

[0030] Fig.14 yes Fig.13 A partial enlarged stereogram of the .

[0031] Fig.15 yes Fig.13 EE cross-sectional view.

[0032] Fig.16 It is a structural front view of an embodiment of the present invention (manhole door is closed).

[0033] Fig.17 yes Fig.16 A partial enlarged stereogram of the .

[0034] Fig.18 yes Fig.16 FF cross-sectional view.

[0035] Fig.19 yes Fig.16 A partial enlarged view of the GG cross-sectional view.

[0036] Fig. 20 yes Fig.19 Enlarged view of point I.

[0037] Reference numerals: centrifugal fan 10; manhole 100; position sensor 101; first sealing ring 102; second sealing ring 103; partition 104; pressure relief slope 105; locking block 110; moving door 200; moving frame 210; pulley 211; door body 220; connecting rod 221; protruding end 222; third sealing ring 223; groove edge 224; roller 225; sliding guide 300; slide rail 310; closing path guide slide rail 320; horizontal slide rail section 321; guide slide rail section 322; vertical slide rail section 323; locking Part 400; locking end 410; partial guide slope 411; multi-link structure 500; connecting rod 510; first connecting rod 510a; second connecting rod 510b; third connecting rod 510c; fourth connecting rod 510d; rotating block 520; first rotating block 520a; second rotating block 520b; third rotating block 520c; fourth rotating block 520d; first connecting end 521a, 521b, 521c, 521d; second connecting end 522a, 522b, 522c, 522d; driving handle 530; driving edge 531. DETAILED DESCRIPTION

[0038] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0039] The terms used in the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The singular forms "a", "the" and "the" used in the present invention and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0040] It should be understood that although the terms "first", "second", "third", etc. may be used to describe various information in the present invention, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0041] See also Figures 1 to 20 A sliding manhole door shown includes a moving door 200 cooperating with a manhole 100, the manhole 100 is arranged on the casing of a centrifugal fan 10, a sliding guide member 300 cooperating with the moving door 200 is arranged on the outer side of the manhole 100, a locking member 400 is arranged on the moving door 200, a locking block 110 cooperating with the locking member 400 is arranged on the outer periphery of the manhole 100, when the moving door 200 moves to the locking position, the moving door 200 is guided to the manhole position, and is locked by the locking member 400 cooperating with the locking block 110, so that the moving door 200 and the manhole 100 complete the closed seal.

[0042] In this embodiment, the movable door 200 includes a movable frame 210 slidably configured with the sliding guide member 300 and a door body 220 movably connected to the movable frame 210, and the locking member 400 is arranged on the door body 220. Specifically, the upper and lower parts of the door body 220 are movably connected to the movable frame 210 through a pair of connecting rods 221. The sliding guide member 300 includes a pair of parallel slide rails 310 respectively arranged at the upper and lower parts of the outer side of the manhole 100, and the upper and lower parts of the movable frame 210 are respectively slidably configured on the slide rails 310 through pulleys 211, and the slide rails 310 are also provided with a closing path guide slide rail 320 cooperating with the door body 220. Specifically, the upper and lower parts of the door body 220 are respectively slidably arranged on the closing path guide rail 320 through rollers 225. The closing path guide rail 320 includes a horizontal rail section 321, a guide rail section 322, and a vertical rail section 323. The horizontal rail section 321 is arranged parallel to the rail 310, and the vertical rail section 323 is arranged perpendicular to the horizontal rail section 321. The two ends of the guide rail section 322 are respectively connected to the horizontal rail section 321 and the vertical rail section 323. When the roller 225 of the door body 220 is guided to the end of the vertical rail section 323, the door body 220 is in the locking position.

[0043] In this embodiment, four locking members 400 are provided on the door body 220 in this embodiment, and the four locking members 400 are respectively arranged on the upper part, the lower part and the two sides of the door body 220, and four locking blocks 110 cooperating with the four locking members 400 are respectively provided on the periphery of the manhole 100. In this way, the periphery of the door body 220 has a locking effect in four directions, ensuring that the door body 220 can be stably fixed on the manhole 100 in all directions.

[0044] In order to facilitate the driving of the locking members 400 and improve the maintenance efficiency, the middle rotating shafts of the four locking members 400 are arranged on the door body 220, one end of each locking member 400 is respectively connected to the multi-link structure 500, and the other end of each locking member 400 is a locking end 410 that cooperates with the locking block 110. The locking end 410 of each locking member 400 is provided with a partial guide slope 411, so that when the locking member 400 rotates to cooperate with the locking block 110, the partial guide slope 411 can reduce the closing resistance.

[0045] The multi-link structure 500 is connected to the driving handle 530. Preferably, the multi-link structure 500 includes four links 510 and four rotating blocks 520 rotatably arranged on the door body 220, the four rotating blocks 520 are distributed on the four vertices of the square, each rotating block has a first connecting end and a second connecting end, the four rotating blocks 520 are respectively a first rotating block 520a, a second rotating block 520b, a third rotating block 520c, and a fourth rotating block 520d, the four links 510 are respectively a first link 510a, a second link 510b, a third link 510c, and a fourth link 510d, the two ends of the first link 510a are rotatably connected to the first connecting end 521a of the first rotating block 520a and the second connecting end 522b of the second rotating block 520b, and the second link 510b is respectively rotatably connected to the first connecting end 521a of the first rotating block 520a and the second connecting end 522b of the second rotating block 520b. The two ends of the third connecting rod 510c are respectively rotatably connected to the first connecting end 521b of the second rotating block 520b and the second connecting end 522c of the third rotating block 520c, the two ends of the third connecting rod 510c are respectively rotatably connected to the first connecting end 521c of the third rotating block 520c and the second connecting end 522d of the fourth rotating block 520d, the two ends of the fourth connecting rod 510d are respectively rotatably connected to the first connecting end 521d of the fourth rotating block 520d and the second connecting end 522a of the first rotating block 520a, one end of the four locking members 400 is respectively slidably connected to the middle parts of the first connecting rod 510a, the second connecting rod 510b, the third connecting rod 510c, and the fourth connecting rod 510d through the sliding groove 401, and one of the connecting rods is connected to the driving handle 530. Specifically, the driving handle 530 is rotatably set on the door body 220, and the driving handle 530 has a driving edge 531 rotatably connected to the second connecting rod 510b.

[0046] A position sensor 101 is provided on the outer shell of the manhole 100. When the door body 220 is guided to the position of the manhole 100 and the closing seal is completed, the protruding end 222 of the door body 220 will trigger the position sensor 101. The position sensor 101 is connected to the control console, and the central control room can start the fan.

[0047] The outer edge of the manhole 100 is provided with a double-layer sealing ring formed by a first sealing ring 102 and a second sealing ring 103, and the double-layer sealing rings are separated by a partition 104. A third sealing ring 223 is provided on the outer edge of the door body 220 facing the manhole 100. When the door body 220 and the manhole 100 complete the closing and sealing, the partition 104 presses the third sealing ring 223, and the groove edges 224 on both sides of the third sealing ring 223 press the first sealing ring 102 and the second sealing ring 103 to form a three-layer sealing structure to further improve the sealing performance.

[0048] In this embodiment, the inner edge of the manhole 100 is provided with a decompression slope 105. Fig.19As shown, when the wind inside the casing hits the decompression slope 105, a lateral airflow will be generated toward the middle of the manhole 100. The lateral airflow and the airflow that directly hits the door body 220 offset part of the impact force, reducing the impact of the airflow on the manhole door. In addition, according to the pressure calculation formula p=F / S, for a constant pressure fan, the decompression slope 105 is extended toward the middle of the manhole to reduce the contact area between the door body 220 and the airflow, thereby reducing the outward thrust on the door body 220 and reducing the pressure on the locking member 400 and the locking block 110.

[0049] The working principle of the present invention is as follows:

[0050] When the manhole door is open (see Figures 1 to 3 As shown), the moving frame 210 is dragged to the left to enter the state before the manhole door changes track (see Figures 4 to 6 As shown), the locking member 400 and the locking block 110 have not yet been locked together, and the driving handle 530 must be ensured to be facing upward. After confirmation, move the moving frame 210 to the left again to enter the state before the manhole door is aligned (see Figures 7 to 9 As shown in FIG. 2 , the door body 220 changes its direction of travel through the guide rail section 322 and moves forward a distance toward the housing. The moving frame 210 is pushed leftward again to enter the state of manhole door alignment (see FIG. 2 ). Figures 10 to 12 As shown), the door body 220 is aligned with the manhole 100, but there is still a gap. Push the moving frame 210 to the left again, and the manhole door is in the set state (see Figures 13 to 15 As shown in FIG. 1 , the door body 220 and the housing manhole 100 are completely fitted together, and the multi-link structure 500 is driven to work by rotating the driving handle 530, and at the same time, the four locking members 400 are driven to rotate toward the locking block 110 until the locking members 400 rotate to the locking groove of the locking block 110 and lock. At this time, the manhole door enters the closed state (see FIG. 1 ). Figures 16 to 19 As shown), the manhole door is completely closed, and the three-layer sealing structure ensures that the gas inside the fan cavity does not leak out. At the same time, the protruding end 222 of the door body 220 contacts the position sensor 101 to complete the closing seal.

[0051] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. 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 those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered 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 that 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 application, it should be understood 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, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; 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] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A sliding manhole door, characterized in that: It comprises a movable door cooperating with a manhole, a sliding guide member cooperating with the movable door is arranged on the outer side of the manhole, a locking member is arranged on the movable door, a locking block cooperating with the locking member is arranged on the outer periphery of the manhole, when the movable door moves to the locking position, the movable door is guided to the manhole position, and is locked by the locking member cooperating with the locking block, so that the movable door and the manhole are closed and sealed.

2. A sliding manhole door according to claim 1, characterized in that: The movable door is provided with four locking pieces, which are respectively arranged at the upper part, the lower part and the two sides of the movable door, and the outer periphery of the manhole is respectively provided with four locking blocks cooperating with the four locking pieces.

3. A sliding manhole door according to claim 2, characterized in that: The central axes of the four locking members are arranged on the movable door, one end of each locking member is respectively connected to the multi-link structure, and the other end of each locking member is a locking end matched with the locking block, and the multi-link structure is connected to the driving handle.

4. The sliding manhole door according to claim 3, characterized in that: The multi-link structure includes four links and four rotating blocks rotatably arranged on the moving door, the four rotating blocks are distributed on the four vertices of a square, each rotating block has a first connecting end and a second connecting end, the four rotating blocks are respectively a first rotating block, a second rotating block, a third rotating block, and a fourth rotating block, the four links are respectively a first link, a second link, a third link, and a fourth link, the two ends of the first link are respectively rotatably connected to the first connecting end of the first rotating block and the second connecting end of the second rotating block, the two ends of the second link are respectively rotatably connected to the first connecting end of the second rotating block and the second connecting end of the third rotating block, the two ends of the third link are respectively rotatably connected to the first connecting end of the third rotating block and the second connecting end of the fourth rotating block, the two ends of the fourth link are respectively rotatably connected to the first connecting end of the fourth rotating block and the second connecting end of the first rotating block, one end of the four locking members is respectively slidably connected to the middle parts of the first link, the second link, the third link, and the fourth link, and one of the links is connected to the driving handle.

5. The sliding manhole door according to claim 1, characterized in that: The movable door comprises a movable frame slidably arranged with the sliding guide member and a door body movably connected with the movable frame, and the locking member is arranged on the door body.

6. The sliding manhole door according to claim 5, characterized in that: The sliding guide comprises a pair of parallel vertical slide rails respectively arranged at the upper and lower parts of the outer side of the manhole, the upper and lower parts of the movable frame are respectively slidably arranged on the slide rails, and the slide rails are also provided with closing path guide slide rails cooperating with the door body.

7. The sliding manhole door according to claim 1, characterized in that: A position sensor is arranged on the outer shell of the manhole. When the movable door is guided to the manhole position and the closing and sealing is completed, the movable door will trigger the position sensor, and the position sensor is connected to the control console.

8. The sliding manhole door according to claim 3, characterized in that: The locking end of each locking member is provided with a partial guiding inclined surface.

9. The sliding manhole door according to claim 1, characterized in that: The outer edge of the manhole is provided with a double-layer sealing ring formed by a first sealing ring and a second sealing ring, and the double-layer sealing rings are separated by a partition. The outer edge of the movable door facing the manhole is provided with a third sealing ring. When the movable door and the manhole are closed and sealed, the partition presses the third sealing ring, and the groove edges on both sides of the third sealing ring press the first sealing ring and the second sealing ring to form a three-layer sealing structure.

10. The sliding manhole door according to claim 1, characterized in that: The inner edge of the manhole is provided with a decompression slope.

Images