Hinge device for pressure environment access door

Abstract

The utility model discloses a hinge device for a pressure environment access door. The hinge device comprises a door body, a door frame, a sealing strip and a hinge mechanism. The hinge mechanism comprises an upper hinge seat, a hinge shaft, a hinge connecting block, a limiting pin and a lower hinge seat; the upper hinge seat is fixed on the door body, and a cylindrical shaft is vertically fixed at the bottom of the upper hinge seat; the hinge connecting block is arranged between the upper hinge seat and the lower hinge seat, one end of the hinge connecting block is rotationally sleeved on the cylindrical shaft, and the other end of the hinge connecting block is rotationally sleeved outside the upper end of the hinge shaft; one end of the lower hinge seat is fixed on the door frame, and the other end of the lower hinge seat extends below the hinge connecting block and rotatably sleeves the lower end of the hinge shaft; the limiting pin is fixed on the lower hinge seat; a check block is fixed to the outer side of the end, close to the lower hinge base, of the hinge connecting block. The hinge can stably bear a heavy door, can limit the opening angle of the door, prevents the surfaces of metal from being damaged, is high in rotation freedom degree, and can ensure that a door body and a door frame can be tightly attached and sealed when the door is closed and pressurized.

Description

Technical Field

[0001] The utility model relates to a hinge device for a pressure environment passage door, in particular to a hinge device for a pressure environment passage door. Background Art

[0002] Passage doors used in pressure environments are generally constructed from pressure-bearing steel. These steel doors are heavy, and the steel door body experiences significant inertia when opened. Without restraints, collisions can easily occur. Furthermore, when closing the door and applying pressure, a tight seal must be ensured between the door body and the door frame. These characteristics place high demands on the hinges. However, existing hinges on the market are typically cylindrical and rotate, with no position limits on the door's opening angle. These hinges are unsuitable for heavy door installations, and they are even incapable of transferring pressure from the container under pressure to the door body, preventing hinge deformation. Utility Model Content

[0003] In order to solve the above problems, the purpose of the utility model is to provide a hinge device for pressure environment passage doors that can stably bear heavy doors, limit the opening angle of the door, avoid surface damage between metals, have a high degree of freedom of hinge rotation, ensure that the door body and the door frame can fit tightly and seal when the door is closed and pressurized, and is not easy to deform.

[0004] The purpose of the utility model is achieved through the following technical solutions:

[0005] A hinge device for a pressure environment passage door, comprising a door body, a door frame, a sealing strip for sealing the door body and the door frame when the door is closed, and a hinge mechanism connected between the door body and the door frame and capable of lifting the door body and rotating axially to open or close the door; the hinge mechanism comprises an upper hinge seat, a hinge shaft, a hinge connecting block, a limit pin and a lower hinge seat; the upper hinge seat is fixed to the door body, and a cylindrical shaft is vertically fixed to the bottom of the upper hinge seat; the hinge connecting block is arranged between the upper hinge seat and the lower hinge seat. One end of the hinge connecting block is rotatably sleeved on the cylindrical shaft, and the other end is rotatably sleeved on the outside of the upper end of the hinge shaft; one end of the lower hinge seat is fixed to the door frame, and the other end extends under the hinge connecting block and is rotatably sleeved on the outside of the lower end of the hinge shaft; the limit pin is fixed to the lower hinge seat; a stop block is fixed on the outer side of the hinge connecting block near one end of the lower hinge seat, and when the door body is opened outward to an angle of 90°-180° with the door frame, the stop block is blocked by the limit pin, and the door body is difficult to open outward again.

[0006] Furthermore, the hinge connecting block is rotatably sleeved outside the cylindrical shaft and rotatably sleeved outside the upper end of the hinge shaft through the preset axial holes at both ends thereof, and the end of the lower hinge seat extending below the hinge connecting block is rotatably sleeved outside the lower end of the hinge shaft through the preset axial hole thereon.

[0007] Furthermore, a tapered roller bearing is installed between the preset shaft hole of the lower hinge seat and the lower end of the hinge shaft, which can reduce the friction between the shaft and the hole, thereby saving effort and reducing friction noise when opening and closing the door.

[0008] Furthermore, a retaining spring is installed on the upper end of the hinge shaft, and the retaining spring is clamped in a shaft hole preset at one end of the hinge connecting block near the lower hinge seat, which can prevent the hinge shaft from sliding out of the rotating hole due to long-term rotation.

[0009] Furthermore, the stop pin is cylindrical, and the corresponding stop block has a curved surface on the side facing the stop pin. When the door is opened outward to an angle of 90°-180° (preferably 95°) with the door frame, the curved surface precisely engages the stop pin. The curved surface on the stop block aligns with the arc surface of the stop pin, increasing the force-bearing surface and reducing metal-to-metal collisions.

[0010] Furthermore, the distance from the center of the arc surface to the center of the hinge axis is equal to the distance from the center of the limit pin to the center of the hinge axis.

[0011] Furthermore, there is a gap between the hinge connecting block and the door body.

[0012] Furthermore, the hinge device for a pressure-environment passage door further includes a limit adjustment screw and a limit nut; one end of the limit adjustment screw is threadedly connected to a preset threaded adjustment hole in the hinge connection block and extends into the gap between the hinge connection block and the door body, while the other end of the limit adjustment screw is located outside the hinge connection block and is threadedly connected to the limit nut. When the limit adjustment screw mounted on the hinge connection block is adjusted, the gap remaining between the hinge connection block and the door body can adjust the fit between the door body and the door frame. When the door is operating under pressure from the container, the sealing surface of the door body can be evenly compressed and the hinge mechanism can be prevented from being damaged by pressure, thereby solving the door's sealing and safety issues.

[0013] The beneficial effects of the present invention are:

[0014] The utility model can stably bear heavy doors with large deadweight (steel doors that can bear pressure), can limit the opening angle of the door to avoid surface damage between metals, and has a high degree of freedom of hinge rotation. When the door is closed and pressurized, the angle of the hinge and the door body can be adjusted to ensure that the door body and the door frame can fit tightly and seal, avoiding deformation of the hinge under pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described in detail below with reference to the accompanying drawings.

[0016] Figure 1 This is a schematic structural diagram of the hinge device for a pressure environment passage door according to the present invention.

[0017] Figure 2 It is a structural schematic diagram of the hinge mechanism of the present invention.

[0018] Figure 3 This is a schematic structural diagram of the hinge device for a pressure environment passage door according to the present invention when the door is open.

[0019] Figure 4 This is a schematic structural diagram of the hinge device for the pressure environment passage door of the present invention when the door is closed.

[0020] Figure 5 This is a structural diagram of the hinge connection block of the present invention.

[0021] As shown in the figure:

[0022] 1-door body, 2-door frame, 3-sealing strip, 4-hinge mechanism, 401-upper hinge seat, 402-hinge shaft, 403-circlip, 404-hinge connecting block, 4041-stopper, 4042-arc surface, 405-tapered roller bearing, 406-limit pin, 407-lower hinge seat, 408-limit adjustment screw, 409-limit nut, 410-screw, 411-cylindrical shaft. DETAILED DESCRIPTION

[0023] The following describes the implementation of the present invention using specific embodiments. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The embodiments described are merely a portion of the present invention, not all of it. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention. Example

[0024] like Figure 1 As shown, this embodiment provides a hinge device for a pressure environment channel door, including a door body 1, a door frame 2, a sealing strip 3 for sealing between the door body 1 and the door frame 2 when the door is closed, and a hinge mechanism 4 connected between the door body 1 and the door frame 2 and capable of supporting the door body 1 and rotating axially to open or close the door.

[0025] The door body 1 is a steel flat door with pressure-bearing capacity. When the door is closed, it can form a closed container with the door frame 2 and the sealing strip 3, and can be opened or closed quickly.

[0026] The door frame 2 is a pressure-bearing seal made of metal that can be welded to the container. It is a passage connecting the inside and outside of the container and forms a quick-opening device with the door body 1, sealing strip 3 and hinge mechanism 4.

[0027] The sealing strip 3 is a rubber part that can be pressed against the metal sealing surface when under pressure to achieve the container sealing effect.

[0028] like Figure 2 As shown, the hinge mechanism includes an upper hinge seat 401 , a hinge shaft 402 , a hinge connecting block 404 , a limiting pin 406 , a lower hinge seat 407 , a limiting adjustment screw 48 and a limiting nut 49 .

[0029] The upper hinge seat 401 is a metal connecting seat. A square countersunk hole with a screw 410 is provided at the upper end of the upper hinge seat 401. The upper hinge seat 401 is fixed to the door body 1 with the screw 410. A cylindrical shaft 411 is vertically fixed at the bottom of the upper hinge seat 401.

[0030] The hinge connection block 404 is a rectangular, high-strength metal block positioned between the upper hinge seat 401 and the lower hinge seat 407. Vertical axial holes are pre-set at each end of the hinge connection block 404. One end of the hinge connection block 404 is rotatably mounted on a cylindrical shaft 411 at the bottom of the upper hinge seat 401 through one of the axial holes, forming a rotational fit. The other end of the hinge connection block 404 is rotatably mounted on the outer edge of the upper end of the hinge shaft 402 through the other axial hole, also forming a rotational fit. Both the cylindrical shaft 411 and the hinge shaft 402 can rotate axially within their respective axial holes, increasing the vertical freedom of the door body 1 relative to the door frame 2. This transfers the stress-bearing surface from the hinge mechanism 4 to the door body 1, protecting the hinge mechanism 4 from deformation under pressure. A gap is provided between the hinge connection block 404 and the door body 1, and a threaded adjustment hole is located in the center of the hinge connection block 404.

[0031] One end of the limit adjustment screw 408 is threaded into a pre-set threaded adjustment hole in the hinge connection block 404 and extends into the gap between the hinge connection block 404 and the door body 1. The other end of the limit adjustment screw 408 is located outside the hinge connection block 404 and is threadedly connected to the limit nut 409. The rotation of the hinge connection block 404 can be adjusted according to the movement of the door body 1 when it is under pressure. When the limit adjustment screw 408 installed on the hinge connection block 404 is adjusted, the gap remaining between the hinge connection block 404 and the door body 1 can be adjusted to adjust the fit between the door body 1 and the door frame 2. When the door is operated under pressure, the sealing surface of the door body 1 is evenly compressed and the hinge mechanism 4 is prevented from being damaged by pressure, thus improving the door's sealing and safety issues.

[0032] The lower hinge seat 407 is a high-strength metal support. One end of the lower hinge seat 407 is welded to the door frame 2, while the other end extends below the hinge connection block 404 and is rotatably mounted on the lower end of the hinge shaft 402 through a pre-set axial hole. A tapered roller bearing 405 is installed between the pre-set axial hole of the lower hinge seat 407 and the lower end of the hinge shaft 402, reducing friction between the shaft and the hole, thereby saving effort and reducing friction noise when opening and closing the door. A retaining spring 403 is installed on the upper end of the hinge shaft 402. This retaining spring 403 is secured within the pre-set axial hole of the hinge connection block 404 near the end of the lower hinge seat 407, preventing the hinge shaft 402 from sliding out of the rotation hole due to prolonged rotation.

[0033] The limit pin 406 is a cylindrical metal piece fixed on the lower hinge seat 407, which can limit the rotation angle of the hinge connecting block 404, thereby limiting the rotation angle of the door body 1.

[0034] A stopper 4041 is fixed to the outside of the hinge connection block 404, near one end of the lower hinge seat 407. The stopper 4041 has a curved surface 4042 on the side facing the stop pin 406. The distance between the center of the curved surface 4042 and the center of the hinge axis 402 is equal to the distance between the center of the stop pin 406 and the center of the hinge axis 402. When the door body 1 is opened outward to an angle of 95° with the door frame 2, the curved surface 4042 is exactly caught on the stop pin 406, and the stopper 4041 is blocked by the stop pin 406, making it difficult for the door body 1 to open further outward. This prevents the door body 1 from over-opening due to inertia and damaging the metal surface. The curved surface 4042 on the stopper 4041 aligns with the arc surface of the stop pin 406, increasing the force-bearing surface and reducing metal-to-metal damage.

[0035] When opening and closing the door, the hinge connecting block 404 and the lower hinge seat 407 rotate with the hinge shaft 402 as the axis core. When the door is opened to the point where the door body 1 and the door frame 2 form a 95-degree angle, the arc surface 4042 of the stop block 4041 is blocked by the limit pin 406. The limit pin 406 limits the opening angle of the door body 1. The limit adjustment screw 408 can be slightly adjusted according to the sealing of the door body 1, the door frame 2 and the sealing strip 3 to achieve the fitting effect between the door body 1 and the door frame 2 when the door is under pressure.

[0036] Other aspects of the present invention that are not described in detail are all conventional technologies known to those skilled in the art.

[0037] It should be noted that the terms "comprises," "includes," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements that are inherent to such process, method, article, or apparatus.

[0038] The protection scope of the present invention is not limited to the technical solutions disclosed in the specific implementation methods. Any modifications, equivalent replacements, improvements, etc. made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A hinge device for a pressure environment passage door, comprising a door body (1), a door frame (2), and a sealing strip (3) for achieving a seal between the door body (1) and the door frame (2) when the door is closed, characterized in that: The door frame (2) further comprises a hinge mechanism (4) connected between the door body (1) and the door frame (2) and capable of lifting the door body (1) and rotating axially to realize opening or closing the door; the hinge mechanism comprises an upper hinge seat (401), a hinge shaft (402), a hinge connecting block (404), a limit pin (406) and a lower hinge seat (407); the upper hinge seat (401) is fixed on the door body (1), and a cylindrical shaft (411) is vertically fixed at the bottom of the upper hinge seat (401); the hinge connecting block (404) is arranged between the upper hinge seat (401) and the lower hinge seat (407), and one end of the hinge connecting block (404) is rotatably sleeved on the cylindrical shaft ( 411), and the other end is rotatably sleeved on the outside of the upper end of the hinge shaft (402); one end of the lower hinge seat (407) is fixed on the door frame (2), and the other end extends below the hinge connecting block (404) and is rotatably sleeved on the outside of the lower end of the hinge shaft (402); the limit pin (406) is fixed on the lower hinge seat (407); a stopper (4041) is fixed on the outer side of the hinge connecting block (404) near one end of the lower hinge seat (407), and when the door body (1) is opened outward to an angle of 90°-180° with the door frame (2), the stopper (4041) is blocked by the limit pin (406), and the door body (1) is difficult to open outward again.

2. The hinge device for a pressure environment passage door according to claim 1, characterized in that: The hinge connecting block (404) is rotatably sleeved outside the cylindrical shaft (411) and outside the upper end of the hinge shaft (402) through the preset shaft holes at both ends thereof, and the end of the lower hinge seat (407) extending below the hinge connecting block (404) is rotatably sleeved outside the lower end of the hinge shaft (402) through the preset shaft hole thereon.

3. The hinge device for a pressure environment passage door according to claim 2, characterized in that: A tapered roller bearing (405) is installed between the preset shaft hole of the lower hinge seat (407) and the lower end of the hinge shaft (402).

4. The hinge device for a pressure environment passage door according to claim 2, characterized in that: A retaining spring (403) is installed on the upper end of the hinge shaft (402), and the retaining spring (403) is clamped in a shaft hole preset at one end of the hinge connecting block (404) close to the lower hinge seat (407).

5. The hinge device for a pressure environment passage door according to claim 1, characterized in that: The limit pin (406) is cylindrical, and correspondingly, the stop block (4041) is provided with an arc surface (4042) on the side facing the limit pin (406). When the door body (1) is opened outward to an angle of 90°-180° with the door frame (2), the arc surface (4042) is just stuck on the limit pin (406).

6. The hinge device for a pressure environment passage door according to claim 5, characterized in that: The distance from the center of the arc surface (4042) to the center of the hinge shaft (402) is equal to the distance from the center of the limit pin (406) to the center of the hinge shaft (402).

7. The hinge device for a pressure environment passage door according to claim 5, characterized in that: When the door body (1) is opened outwards to an angle of 95° with the door frame (2), the arc surface (4042) is just stuck on the limit pin (406), and the stopper (4041) is blocked by the limit pin (406), making it difficult for the door body (1) to open outwards any further.

8. The hinge device for a pressure environment passage door according to claim 1, characterized in that: There is a gap between the hinge connection block (404) and the door body (1).

9. The hinge device for a pressure environment passage door according to claim 8, characterized in that: It also includes a limit adjustment screw (408) and a limit nut (409); one end of the limit adjustment screw (408) is threadedly connected to a preset thread adjustment hole on the hinge connection block (404) and extends into the gap between the hinge connection block (404) and the door body (1), and the other end of the limit adjustment screw (408) is located outside the hinge connection block (404) and is threadedly connected to the limit nut (409).

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