Manhole arrangement for a pressure vessel

Abstract

The manhole device belongs to the technical field of pressure containers and comprises a door plate and a manhole frame, the door plate is provided with a handle which is rotatably installed on the door plate, the door plate and the manhole frame are locked through a locking mechanism, the locking mechanism comprises left and right locking assemblies which are arranged on the left and right side plates of the manhole frame respectively, the left and right locking assemblies each comprise a fixed wedge and a rotating wedge, the fixed surface comprises a first locking surface and a first guide surface, the rotating wedge comprises a connecting body and a locking body which are fixedly integrated, the connecting body is fixedly connected with the handle, the locking body is provided with a second guide surface and a second locking surface, the second guide surface has the same inclination trend as the first guide surface, when the second guide surface is in sliding contact with the first guide surface, the door plate can be pulled to the manhole frame, the first locking surface and the second locking surface are attached to realize the locking of the door plate and the manhole frame, and the manhole device is convenient for entry and exit and is suitable for being applied to the pressure container in experiments.

Description

Technical Field

[0001] This utility model relates to the field of pressure vessel technology, specifically to a manhole device for a pressure vessel. Background Technology

[0002] Pressure vessels are not only used to fill liquids or gases. In some scientific research and experimental settings, pressure vessels also serve as the carriers of experimental chambers, housing various experimental devices that require personnel to work normally under normal pressure. In such cases, the manholes of conventional pressure vessels are inconvenient for personnel to enter and exit. For researchers, this presents two main risks: firstly, certain experimental devices need to be moved in and out, which cannot be achieved through circular manholes. Summary of the Invention

[0003] To address the problems existing in the prior art, this utility model provides a manhole device for pressure vessels that facilitates entry and exit, provides a good locking and sealing effect, and is suitable for pressure vessels used in experiments.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: This utility model provides a manhole device for a pressure vessel, including a door panel and a manhole frame. A handle is rotatably mounted on the door panel, and a channel is provided inside the manhole frame. The door panel and the manhole frame are rotatably connected to close the channel. The door panel and the manhole frame are locked together by a locking mechanism, which includes a left locking component and a right locking component, respectively disposed near the left and right side panels of the manhole frame. Both the left and right locking components include a fixed wedge and a rotating wedge. The fixing wedge is fixed on the left or right inner wall of the passage and has a fixing surface facing away from the door panel; the fixing surface includes a first locking surface and a first guiding surface, the first locking surface is parallel to the door panel, the upper end of the first guiding surface is connected to the first locking surface, and the lower end is inclined and extends towards the side closer to the door panel; The rotating wedge is located within the channel. The rotating wedge includes a connecting body and a locking body fixed together. The connecting body is fixedly connected to the handle and rotates synchronously. The locking body extends radially outward from the connecting body in a fan shape. The side of the locking body facing the door panel includes a second guide surface and a second locking surface. The second locking surface is parallel to the door panel, and the second guide surface has the same inclination trend as the first guide surface. When the second guide surface slides into contact with the first guide surface, the door panel can be pulled toward the manhole frame; the first locking surface and the second locking surface fit together to lock the door panel and the manhole frame.

[0005] In the manhole device of the pressure vessel described above, the door panel is a side-opening type.

[0006] In the manhole device of the pressure vessel described above, a sealing element is provided at the contact point between the door panel and the manhole frame.

[0007] In the manhole device of the pressure vessel described above, the sealing element is a rubber sealing ring.

[0008] In the manhole device of the pressure vessel described above, the side of the locking body facing the door panel further includes a third guide surface, which is symmetrically arranged on both sides of the second locking surface in the circumferential direction.

[0009] In the manhole device of the pressure vessel described above, both the door panel and the manhole frame are rectangular.

[0010] In the manhole device of the pressure vessel described above, a limiting body is provided on the end face of the connecting body facing the door panel. The limiting body has an arc surface, the arc surface corresponds to the position of the locking body, and the diameter of the arc surface is larger than the outer diameter of the connecting body and smaller than the outer diameter of the locking body.

[0011] The beneficial effects of this utility model are as follows: Both the door panel and the manhole frame of the manhole device are roughly rectangular, facilitating entry and exit, and are therefore suitable for use on experimental pressure vessels. Meanwhile, the locking mechanism's fixed wedge and rotating wedge work together to not only lock the door panel to the manhole frame, but also guide the rotating wedge, handle, and door panel to move synchronously during the locking operation by using the second guide surface to cooperate with the first guide surface. This allows the door panel to move towards and approach the manhole frame, and the sealing element is squeezed by the door panel and the manhole frame, forming an effective and stable seal that meets the requirements of the experimental environment.

[0012] The manhole device has achieved ideal results in practical applications. It has a simple structure, which saves on design and manufacturing costs; it is easy to operate, as locking and unlocking can be completed by rotating the handle without tools, thus shortening the operation time; and it has high user satisfaction.

[0013] The fixed wedge and the rotating wedge work together to form a gradual mechanical clamping. When the handle is rotated, an axial force is generated, which rigidly presses the door panel against the seal. The sealing pressure increases with the increase of the handle torque, making it more fatigue-resistant than bolt fastening.

[0014] The side-opening door panel, compared to a hinged or top-opening door, allows the door panel to rotate along a horizontal axis, creating an unobstructed vertical passage for easy access for personnel or tools. The left and right locking components work together to lock the door panel simultaneously on both sides, resulting in higher reliability. Attached Figure Description

[0015] Figure 1 A three-dimensional structural diagram of the manhole device of a pressure vessel from a first-view perspective; Figure 2 A two-dimensional structural diagram of the manhole device of a pressure vessel from a second perspective; Figure 3 This is a schematic diagram of the right locking assembly; Figure 4 This is a schematic diagram of the left locking assembly.

[0016] In the picture: 1-Door panel, 2-Handle, 3-Manhole frame, 4-Fixing wedge, 5-Rotating wedge, 6-Sealing element, 7-Channel, 8-First guide surface, 9-Third guide surface, 10-Second guide surface; 11-First locking surface; 12-Second locking surface; 13-Connecting body; 14-Locking body; 15-Limiting body; 16-Abutting surface; 17-Arc surface. Detailed Implementation

[0017] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0018] Please refer to Figure 1 , Figure 2 This invention provides an embodiment of a manhole device for a pressure vessel, comprising a door panel 1 and a manhole frame 3. The manhole frame 3 has an internal channel 7, one end of which connects to the inner cavity of the pressure vessel. The door panel 1 is rotatably mounted on the end of the manhole frame 3 furthest from the pressure vessel, and can close the channel 7. The door panel 1 is side-opening, capable of rotating around its axis to one side of the manhole frame 3, and when fully open, it does not obstruct access to the channel 7. Preferably, both the door panel 1 and the manhole frame 3 are approximately rectangular, i.e., the manhole frame 3 has an internal channel 7 with a rectangular cross-section, and the door panel 1 is a rectangular plate, facilitating entry and exit.

[0019] A sealing element 6 is provided at the abutment of the door panel 1 and the manhole frame 3. The sealing element 6 can be a rubber sealing ring, etc., and is fixed to the door panel 1 or the manhole frame 3. When the door panel 1 and the manhole frame 3 are locked, they seal the abutment surfaces of the two. Correspondingly, the end of the manhole frame 3 that mates with the door panel 1 can be provided with an extension portion extending inward or outward towards the channel 7, forming a flange-like structure to increase the contact surface with the sealing element 6 and ensure a stable and reliable seal.

[0020] The door panel 1 and the manhole frame 3 are locked together by a locking mechanism, which includes a left locking component and a right locking component, respectively located near the left and right side panels of the manhole frame 3. After the door panel 1 closes the channel 7, the left locking component and the right locking component apply force to the left and right sides of the door panel 1 respectively, working together to lock the door panel 1 and the manhole frame 3. At the same time, a pushing force is applied to the door panel 1 towards the manhole frame 3, and the sealing element 6 is squeezed by the door panel 1 and the manhole frame 3, forming an effective seal at the abutment of the door panel 1 and the manhole frame 3.

[0021] It should be noted that left and right refer to the left and right directions when the user is facing the manhole frame 3, respectively. Figure 1 The right locking assembly is located near the pivot of door panel 1, while the left locking assembly is located away from the pivot of door panel 1. Figure 3 and Figure 4 The diagram shows structural examples of the right and left locking components. The arrows in the diagram indicate the direction of the locking operation; to release the lock, simply rotate in the opposite direction.

[0022] Specifically, both the left and right locking components include a fixed wedge 4 and a rotating wedge 5. The fixed wedge 4 is fixed on the left or right inner wall of the channel 7 and has a fixing surface facing away from the door panel 1. The fixing surface includes a first locking surface 11 and a first guide surface 8. The first locking surface 11 is parallel to the door panel 1, and the first guide surface 8 is an inclined surface with its upper end connected to the first locking surface 11 and its lower end inclined and extending towards the side closer to the door panel 1.

[0023] A handle 2 is rotatably mounted on the door panel 1. The rotatable connection between the handle 2 and the door panel 1 is existing technology and will not be described in detail here. A rotating wedge 5 is located inside the channel 7 and is fixedly connected to the handle 2, rotating synchronously with the handle. Exemplarily, the rotating wedge 5 includes a connecting body 13 and a locking body 14, which are fixedly connected, preferably as an integral structure. The connecting body 13 is a cylinder with a through hole through which the handle 2 passes and is fixedly connected to the connecting body 13; the locking body 14 extends radially outward from the connecting body 13 in a fan shape. The side of the locking body 14 facing the door panel 1 includes a second guide surface 10 and a second locking surface 12. The second locking surface 12 is parallel to the door panel 1, and the second guide surface 10 has the same inclination as the first guide surface 8. The second guide surface 10 and the second locking surface 12 transition smoothly.

[0024] When the door panel 1 is rotated to close the manhole frame 3, the locking body 14 and the fixing wedge 4 need to be offset. After the door panel 1 contacts the manhole frame 3, the handle 2 is rotated to perform the locking operation. During the rotation of the wedge 5 with the handle 2, the second guide surface 10 first contacts the first guide surface 8 and slides relative to it. The inclined surfaces of the two make the wedge 5 able to pull the handle 2 and the door panel 1 towards the manhole frame 3 by a certain distance, thereby tightening and locking the door panel 1 onto the manhole frame 3. The sealing element 6 is squeezed by the door panel 1 and the manhole frame 3, which can obtain a larger contact and sealing surface and improve the sealing effect. When the wedge 5 rotates to the point where the second locking surface 12 slides into contact with the first locking surface 11, the locking is completed.

[0025] To prevent the handle 2 from rotating too much, a limiting structure, such as a boss or a limiting pin, can be provided on the side of the first locking surface 11 away from the first guide surface 8.

[0026] Optionally, the locking body 14 also includes a third guide surface 9 on the side facing the door panel 1. The third guide surface 9 and the second guide surface 10 are located on opposite sides of the second locking surface 12, preferably symmetrically arranged. In this way, the same rotating wedge 5 can be applied to both the left and right locking assemblies, reducing the number of parts. The difference is that when applied to the left locking assembly, the third guide surface 9 engages with the first guide surface 8, while when applied to the right locking assembly, the second guide surface 10 engages with the first guide surface 8.

[0027] Furthermore, such as Figure 4 As shown, a limiting body 15 is provided on the end face of the connecting body 13 facing the door panel 1. The limiting body 15 is not cylindrical and has an arc surface 17. The arc surface 17 corresponds to the third guide surface 9, the second locking surface 12, and the second guide surface 10. The diameter of the arc surface 17 is larger than the outer diameter of the connecting body 13. The left or right side of the fixing wedge 4 is fixedly connected to the manhole frame 3. The side of the fixing wedge 4 connected to the manhole frame 3 is the fixing surface, and the side opposite to the fixing surface is the abutment surface 16. When the fixing wedge 4 contacts the rotating wedge 5, the arc surface 13 contacts the abutment surface 16. This can limit the door panel 1 in the horizontal direction.

[0028] It should be noted here that the rotating wedges 5 of both the left and right locking components can adopt the following... Figure 3 As shown, both can be used. Figure 4 The structure shown can also be adopted separately. Figure 3 and Figure 4 The structure of each can achieve door panel 1 locking.

[0029] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A manhole device for a pressure vessel, comprising a door panel (1) and a manhole frame (3), wherein a handle (2) is rotatably mounted on the door panel (1), and a channel (7) is provided inside the manhole frame (3), wherein the door panel (1) is rotatably connected to the manhole frame (3) and can close the channel (7); characterized in that, The door panel (1) and the manhole frame (3) are locked together by a locking mechanism. The locking mechanism includes a left locking component and a right locking component, which are respectively located near the left and right side panels of the manhole frame (3). Both the left locking component and the right locking component include a fixed wedge (4) and a rotating wedge (5). The fixing wedge (4) is fixed on the left inner wall or the right inner wall of the channel (7) and has a fixing surface facing away from the door panel (1); the fixing surface includes a first locking surface (11) and a first guide surface (8), the first locking surface (11) is parallel to the door panel (1), the upper end of the first guide surface (8) is connected to the first locking surface (11), and the lower end is inclined and extended towards the side closer to the door panel (1); The rotating wedge (5) is located inside the channel (7). The rotating wedge (5) includes a connecting body (13) and a locking body (14) fixed together. The connecting body (13) is fixedly connected to the handle (2) and rotates synchronously. The locking body (14) extends radially outward from the connecting body (13) in a fan shape. The side of the locking body (14) facing the door panel (1) includes a second guide surface (10) and a second locking surface (12). The second locking surface (12) is parallel to the door panel (1). The second guide surface (10) has the same inclination trend as the first guide surface (8). When the second guide surface (10) slides into contact with the first guide surface (8), the door panel (1) can be pulled toward the manhole frame (3); the first locking surface (11) and the second locking surface (12) fit together to lock the door panel (1) and the manhole frame (3).

2. The manhole device for a pressure vessel according to claim 1, characterized in that, The door panel (1) is a side-opening type.

3. The manhole device for a pressure vessel according to claim 1, characterized in that, A sealing element (6) is provided at the contact point between the door panel (1) and the manhole frame (3).

4. The manhole device for a pressure vessel according to claim 3, characterized in that, The sealing element (6) is a rubber sealing ring.

5. A manhole device for a pressure vessel according to claim 1, characterized in that, The locking body (14) also includes a third guide surface (9) on the side facing the door panel (1), and the third guide surface (9) and the second guide surface (10) are symmetrically arranged on both sides of the second locking surface (12).

6. A manhole device for a pressure vessel according to claim 1, characterized in that, Both the door panel (1) and the manhole frame (3) are rectangular.

7. A manhole device for a pressure vessel according to claim 1, characterized in that, The connector (13) has a limiting body (15) on its end face facing the door panel (1). The limiting body (15) has an arc surface (17). The arc surface (17) corresponds to the locking body (14) and the diameter of the arc surface (17) is greater than the outer diameter of the connector (13) and smaller than the outer diameter of the locking body (14).

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