A manhole structure that can improve work efficiency

Abstract

This utility model relates to a manhole structure that can improve work efficiency, comprising: a manhole connector and a manhole cover, wherein the manhole connector and the manhole cover are connected by a plurality of first fixing members, and the manhole connector and the manhole cover are connected by a boom rotating mechanism, the boom rotating mechanism comprising: a boom, a hanging mechanism for connecting the boom and the manhole cover, and a rotating mechanism for connecting the boom and the manhole connector, the boom comprising a horizontal section and a vertical section, the hanging mechanism comprising: a hanging frame sleeved on the horizontal section of the boom, the hanging frame comprising a first side plate, a second side plate, and an upper connecting plate and a lower connecting plate disposed between the first side plate and the second side plate, the hanging frame comprising a roller, the central support of the roller resting on the horizontal section of the boom and capable of rolling relative to the horizontal section of the boom to achieve relative displacement between the hanging frame and the horizontal section of the boom, the rotating mechanism comprising: a support cylinder and an ear plate for connecting the support cylinder and the manhole connector, thereby greatly improving work efficiency.

Description

[Technical Field]

[0001] This utility model relates to the field of reaction vessels, and in particular to a manhole structure that can improve working efficiency. [Background Technology]

[0002] A reaction vessel is a container used to carry out physical or chemical reactions in a medium. In industrial production, especially in the chemical, pharmaceutical, fertilizer, and refining industries, reaction vessels are widely used as pressure-bearing equipment due to process requirements.

[0003] To facilitate equipment maintenance, manhole structures are typically installed on reaction vessels. Please refer to Chinese Patent No. 202123413404.8, which discloses a manhole structure including a manhole connector (i.e., a manhole cone), a manhole cover, and a flange welded to the manhole connector. The flange and manhole cover are connected by several fasteners. This manhole structure is designed this way for low-pressure applications, hence the manhole connector is designed to be relatively thin. However, in high-pressure applications, this design is unsuitable. To enable the manhole connector to withstand higher pressures, its wall thickness is designed to be thicker. Please refer to [further details omitted]. Figure 1 This paper reveals a manhole structure suitable for high-pressure applications in the prior art. Because the manhole pipe wall is relatively thick, in order to simplify the structure, no additional flange is welded to the manhole pipe. Instead, the manhole cover 3 is fixed to the manhole pipe 2 by directly screwing the fastener 1' into the manhole pipe 2'. The disadvantages of this structure are: 1. The labor intensity of workers is relatively high. There are many studs and nuts around the manhole cover 3'. Since the reaction vessel is a large piece of equipment, the studs and nuts used on it are also heavy. The weight of a single stud is about 40KG, and the weight of a single nut is about 8KG. Workers need to remove all the studs and nuts to open the manhole cover 3'; 2. Because the manhole cover 3' is heavy, hoisting equipment is required for operation, and the operation also poses certain safety hazards to the workers.

[0004] Therefore, we considered how to improve the existing thick-walled manhole structure. The improved structure would allow workers to open the manhole cover simply by removing the lighter nuts, while the heavier studs could remain inside the manhole connector without needing to be removed. This would greatly improve worker efficiency and reduce labor intensity. In addition, we considered how to connect the manhole cover and the manhole connector using a connecting structure, allowing the opening and closing of the manhole cover to be independent of the hoisting equipment, thereby greatly improving operational safety and avoiding potential safety hazards. [Utility Model Content]

[0005] To address the aforementioned problems, the purpose of this utility model is to provide a manhole structure that can improve work efficiency.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a manhole structure that can improve work efficiency, comprising: a manhole connector and a manhole cover, wherein the manhole connector and the manhole cover are connected by a plurality of first fixing members, and the manhole connector and the manhole cover are connected by a boom rotating mechanism, wherein the boom rotating mechanism comprises: a boom, a hanging mechanism for connecting the boom and the manhole cover, and a rotating mechanism for connecting the boom and the manhole connector, wherein the boom comprises a horizontal section and a vertical section, wherein the free end of the horizontal section is provided with a first sealing plate, a first retaining ring is provided on the horizontal section, and a second retaining ring is provided on the vertical section, wherein the hanging mechanism comprises: a hanging frame sleeved on the horizontal section of the boom, wherein the hanging frame comprises a first side plate, a second side plate, and an upper connecting plate and a lower connecting plate disposed between the first side plate and the second side plate, and rollers are provided inside the hanging frame. One free end of the roller is installed in the first side plate, and the other free end of the roller is installed in the second side plate. The center of the roller is supported on the horizontal section of the boom and can roll relative to the horizontal section of the boom to achieve relative displacement between the lifting frame and the horizontal section of the boom. The top of the manhole cover is provided with a hook, and the hook is connected to the lower connecting plate of the lifting frame by a second fixing member. The rotating mechanism includes a support cylinder section and an ear plate for connecting the support cylinder section and the manhole pipe. The bottom of the support cylinder section is provided with a lower sealing plate, and the lower sealing plate is connected to the support cylinder section by several third fixing members. The upper part of the support cylinder section is provided with a ball groove, and several balls are provided in the ball groove. The bottom of the vertical section of the boom is housed in the support cylinder section, and the second retaining ring of the vertical section of the boom is supported on several balls.

[0007] Preferably, the manhole structure of the present invention that can improve work efficiency is further configured such that: Teflon is provided between the bottom of the vertical section of the boom and the support cylinder.

[0008] Preferably, the manhole structure of the present invention that can improve work efficiency is further configured such that the first fixing member is a stud and a nut.

[0009] Preferably, the manhole structure of the present invention that can improve work efficiency is further configured such that: the second fixing member is a hinge bolt and a nut.

[0010] Preferably, the manhole structure in this utility model that can improve work efficiency is further configured such that the third fixing member is a bolt.

[0011] Preferably, the manhole structure of the present invention that can improve work efficiency is further configured such that the boom is in the shape of an inverted L.

[0012] Preferably, a manhole structure that can improve work efficiency in this utility model is further configured such that a diaphragm gasket is provided between the manhole cover and the manhole pipe.

[0013] Preferably, the manhole structure of the present invention that can improve work efficiency is further configured such that the manhole cover is provided with a handle.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The manhole structure in the present invention allows the frame to make linear displacement relative to the horizontal section of the boom by setting rollers inside the frame, and allows the boom to rotate relative to the rotating mechanism by setting a rotating mechanism. By combining linear displacement and rotation, the manhole cover can always move along the axis of the first fixing stud, so the stud can always remain inside the manhole connector. Workers only need to remove the lighter nut, which greatly reduces the workload of workers and improves work efficiency. In addition, the rotating mechanism in the present invention has Teflon between the bottom of the vertical section of the boom and the support cylinder, and is supported by several steel balls by the second retaining ring of the vertical section of the boom, which makes the rotation of the boom smoother. [Attached Image Description]

[0015] Figure 1 This is a schematic diagram of a manhole structure in the prior art.

[0016] Figure 2 This is a schematic diagram of the manhole structure in this utility model (showing the situation when the manhole cover is not open).

[0017] Figure 3 This is a structural schematic diagram of the manhole structure in this utility model from another angle.

[0018] Figure 4 for Figure 3 A detailed structural diagram of point A in the middle.

[0019] Figure 5 This is a schematic diagram of the rotating mechanism.

[0020] Figure 6 This is a schematic diagram of the boom structure.

[0021] Figure 7 This is a schematic diagram of the manhole structure in this utility model (showing the situation when the manhole cover is open).

[0022] Figure 1 In the middle: 1`, fastener; 2`, manhole connector; 3`, manhole cover.

[0023] Figures 2 to 7In the figure: 1, manhole nozzle; 2, manhole cover; 20, diaphragm gasket; 21, handle; 22, lifting hook; 3, first fixing member; 4, lifting arm; 40, transverse section; 400, first sealing plate; 401, first stop ring; 41, vertical section; 410, second stop ring; 5, hanging mechanism; 50, lifting frame; 500, first side plate; 501, second side plate; 502, upper connecting plate; 503, lower connecting plate; 504, roller; 505, second fixing member; 6, rotating mechanism; 60, supporting shell ring; 600, steel ball groove; 601, steel ball; 602, Teflon; 61, ear plate; 62, lower sealing plate. [Detailed Description of Embodiments]

[0024] Hereinafter, a manhole structure capable of improving working efficiency according to the present utility model is further described in detail through specific embodiments.

[0025] Refer to Figures 2 to 7 as shown, a manhole structure capable of improving working efficiency comprises: a manhole nozzle 1 and a manhole cover 2, the manhole nozzle 1 and the manhole cover 2 are connected by a plurality of first fixing members 3, in the present embodiment, the first fixing members 3 are studs and nuts, a lifting arm rotating mechanism is connected between the manhole nozzle 1 and the manhole cover 2, the lifting arm rotating mechanism comprises: a lifting arm 4, a hanging mechanism 5 for connecting the lifting arm 4 and the manhole cover 2, and a rotating mechanism 6 for connecting the lifting arm 4 and the manhole nozzle 1. A diaphragm gasket 20 is arranged between the manhole cover 2 and the manhole nozzle 1, so that good sealing performance is achieved. A handle 21 is arranged on the manhole cover 2, thereby facilitating operation.

[0026] The boom 4 is arranged in an inverted L-shape. The boom 4 includes a horizontal section 40 and a vertical section 41. The free end of the horizontal section 40 is provided with a first sealing plate 400. The horizontal section 40 is provided with a first retaining ring 401. The vertical section 41 is provided with a second retaining ring 410. The hanging mechanism 5 includes a hanging frame 50 sleeved on the horizontal section 40 of the boom. The hanging frame 50 includes a first side plate 500, a second side plate 501, and an upper connecting plate 502 and a lower connecting plate 503 disposed between the first side plate 500 and the second side plate 501. In this embodiment, the first side plate 500 and the second side plate 501 are arranged in parallel. The upper connecting plate 502 and the lower connecting plate 503 are respectively arranged perpendicular to the first side plate 500 and the second side plate 501. The lifting frame 50 is equipped with a roller 504. One free end of the roller 504 is installed in the first side plate 500, and the other free end of the roller 504 is installed in the second side plate 501. The center of the roller 504 is supported on the horizontal section 40 of the boom 4 and can roll relative to the horizontal section 40 of the boom, thereby realizing the relative displacement movement between the lifting frame 50 and the horizontal section 40 of the boom. The top of the manhole cover 2 is equipped with a hook 22. The hook 22 is connected to the lower connecting plate 503 of the lifting frame 50 by a second fixing member 505. In this embodiment, the second fixing member 505 is a hinge bolt and a nut. The rotating mechanism 6 includes a support cylinder 60 and an ear plate 61 for connecting the support cylinder 60 and the manhole pipe 1. The bottom of the support cylinder 60 is equipped with a lower sealing plate 62. The lower sealing plate 62 is connected to the support cylinder 60 by a plurality of third fixing members. In this embodiment, the third fixing members are bolts. A ball bearing groove 600 is provided above the support cylinder section 60, and a number of ball bearings 601 are provided in the ball bearing groove 600. The bottom of the vertical section 41 of the boom 4 is housed in the support cylinder section 60. The second retaining ring 410 of the vertical section 41 of the boom is supported on the number of ball bearings 601. Teflon 602 is provided between the bottom of the vertical section 41 of the boom 4 and the support cylinder section 60, so that the rotation of the boom is smoother.

[0027] When it is necessary to open the manhole cover 2, first remove all the nuts on the first fixing member 3, leaving all the studs on the first fixing member 3 inside the manhole connector 1. Then, the worker holds the handle 21 on the manhole cover 2 and pushes it away from the manhole connector 1 along the axis of the studs of the first fixing member 3 (at this moment, the lifting frame 50 moves in a straight line away from the rotating mechanism 6 relative to the horizontal section 40 of the boom). While the worker pushes, the boom 4 rotates counterclockwise relative to the support cylinder 60 of the rotating mechanism 6. When the maintenance is completed and the manhole cover 2 needs to be closed, the worker holds the handle 21 on the manhole cover 2 and pushes it towards the manhole connector 1 along the axis of the studs of the first fixing member 3 (at this moment, the lifting frame 50 moves in a straight line towards the rotating mechanism 6 relative to the horizontal section 40 of the boom). While the worker pushes, the boom 4 rotates clockwise relative to the support cylinder 60 of the rotating mechanism 6. Finally, tighten all the nuts. In this invention, because the manhole cover 2 always moves along the axis of the stud whether it is opened or closed, the stud of the first fixing member 3 can always remain inside the manhole connector 1, thus avoiding the need for workers to move the 40KG stud.

[0028] In summary, the manhole structure of this utility model allows the hanging frame 50 to make linear displacement relative to the horizontal section 40 of the boom by setting rollers 504 inside the hanging frame, and allows the boom 4 to rotate relative to the rotating mechanism 6 by setting a rotating mechanism 6. Through the combination of linear displacement and rotation, the manhole cover 2 can always move along the axis of the stud of the first fixing member 3. Therefore, the stud can always be kept in the manhole connector 1, and the worker only needs to remove the lighter nut, which greatly reduces the worker's workload and improves work efficiency.

[0029] The above embodiments are merely illustrative of the principles and effects of this utility model, as well as some of its applications, and are not intended to limit this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A manhole structure that can improve work efficiency, comprising: A manhole connector and a manhole cover, wherein the manhole connector and the manhole cover are connected by a plurality of first fixing members, characterized in that: the manhole connector and the manhole cover are connected by a boom rotating mechanism, the boom rotating mechanism comprising: a boom, a suspension mechanism for connecting the boom and the manhole cover, and a rotation mechanism for connecting the boom and the manhole connector, the boom comprising a horizontal section and a vertical section, the free end of the horizontal section being provided with a first sealing plate, the horizontal section being provided with a first retaining ring, and the vertical section being provided with a second retaining ring, the suspension mechanism comprising: a lifting frame sleeved on the horizontal section of the boom, the lifting frame comprising a first side plate, a second side plate, and an upper connecting plate and a lower connecting plate disposed between the first side plate and the second side plate, the lifting frame being provided with rollers, one free end of the rollers being installed on a first... Inside one side plate, the other free end of the roller is installed inside the second side plate. The center of the roller is supported on the horizontal section of the boom and can roll relative to the horizontal section of the boom to achieve relative displacement between the lifting frame and the horizontal section of the boom. The top of the manhole cover is provided with a hook. The hook is connected to the lower connecting plate of the lifting frame by a second fixing member. The rotating mechanism includes: a support cylinder section and an ear plate for connecting the support cylinder section and the manhole pipe. The bottom of the support cylinder section is provided with a lower sealing plate. The lower sealing plate is connected to the support cylinder section by several third fixing members. The upper part of the support cylinder section is provided with a ball groove containing several balls. The bottom of the vertical section of the boom is housed in the support cylinder section. The second retaining ring of the vertical section of the boom is supported on several balls.

2. The manhole structure for improving work efficiency as described in claim 1, characterized in that: Teflon is installed between the bottom of the vertical section of the boom and the support cylinder.

3. The manhole structure for improving work efficiency as described in claim 1, characterized in that: The first fastener is a stud and a nut.

4. The manhole structure for improving work efficiency as described in claim 1, characterized in that: The second fastener is a hinge bolt and a nut.

5. The manhole structure for improving work efficiency as described in claim 1, characterized in that: The third fastener is a bolt.

6. The manhole structure for improving work efficiency as described in claim 1, characterized in that: The boom is arranged in an inverted L-shape.

7. A manhole structure for improving work efficiency as described in claim 1, characterized in that: A diaphragm gasket is provided between the manhole cover and the manhole connector.

8. The manhole structure for improving work efficiency as described in claim 1, characterized in that: The manhole cover is equipped with a handle.

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