Steel structure closed civil air defense door

Abstract

The utility model provides a steel structure closed civil air defense door, and relates to the field of steel structure civil air defense doors. The steel structure closed civil air defense door comprises a door frame and a door body, the door body is hinged to the door frame, a check ring is arranged in the door frame, clamping strips are installed at the upper end and the lower end of the door frame, a pulling-closing mechanism is arranged in the door body, the output ends of the pulling-closing mechanism are located above and below the door body, when the door body is closed, the door body makes contact with the check ring, the pulling-closing mechanism is connected with the clamping strips, and a closing mechanism is further arranged in the door body. When the door body is closed, the closing mechanism clamps the check ring. According to the closed civil air defense door with the steel structure, by arranging the pulling and closing mechanism, when the door body is closed, the door body does not need to be completely closed tightly, only the shifting rod needs to be located in the clamping strip, then the hand wheel A is rotated, the transmission shaft drives the shifting rod to slowly rotate into the clamping strip, and then the shifting rod can be promoted to pull the door body to be slowly closed tightly due to the counter-acting force. Therefore, when the door closing resistance is large, the door body can be closed in a labor-saving manner, and the door body with a slope can be easily closed.

Description

Technical Field

[0001] The utility model relates to the field of steel structure civil air defense doors, in particular to a steel structure closed civil air defense door. Background Art

[0002] Civil defense is also known as civil defense. Civil defense is an internationally accepted term. It refers to the activities of the government mobilizing and organizing the masses to take anti-air raid, disaster prevention and relief measures, implement rescue operations, and prevent and reduce the harm of disasters. Civil defense doors belong to civil defense protection equipment. Civil defense doors are the doors at the entrances and exits of people's defense projects. The classification of civil defense doors is relatively clear. There are ordinary single-leaf and double-leaf protective closed doors and closed doors, single-leaf and double-leaf protective closed doors and closed doors with movable thresholds, and other civil defense equipment. However, the existing civil defense doors mostly use valves for auxiliary control when opening and closing, but their cost is relatively high and cannot be fully promoted. At the same time, the existing civil defense doors are mostly single-door fixed, and there are many usage problems in complex environments.

[0003] Chinese Patent: CN211473893U discloses a lightweight steel structure civil air defense door, wherein a second rotating shaft is arranged on the sliding door, and the sliding door is provided with two second rotating shafts, and the second rotating shaft passes through the sliding door, and a turntable is arranged on one side of the second rotating shaft, and the turntable is fixedly connected to the second rotating shaft, and a third rotating shaft is arranged on one side of the turntable, and the third rotating shaft is arranged in two groups, and each group of the third rotating shafts is provided with four, and a rotating bar is arranged on the third rotating shaft, and a fixed sleeve is arranged on the rotating bar, and the fixed sleeve is fixedly connected to the rotating bar, and a fourth rotating shaft is arranged on the fixed sleeve, and a pressure block is arranged on the fourth rotating shaft, and the fourth rotating shaft passes through the pressure block and the fixed sleeve, and a fifth rotating shaft is arranged on the pressure block.

[0004] In this solution, if the door encounters great resistance and is difficult to close tightly, the pressing block cannot be put into the fixed groove by simply rotating the handle, and it is very difficult to close the door. Or, when the door has a certain slope, it is difficult to close tightly. Utility Model Content

[0005] 1. Technical issues to be solved

[0006] In view of the deficiencies in the prior art, the utility model provides a steel structure enclosed civil air defense door, which solves the problems raised in the background technology.

[0007] (II) Technical solution

[0008] To achieve the above objectives, the utility model is implemented through the following technical solutions: a steel structure enclosed civil defense door, including a door frame and a door body, the door body is hinged to the door frame, a retaining ring is provided in the door frame, and clamping strips are installed at the upper and lower ends of the door frame, and a pulling and closing mechanism is provided in the door body. The output ends of the pulling and closing mechanism are located above and below the door body, and contact with the retaining ring when the door body is closed. The pulling and closing mechanism is connected to the clamping strip, and a closing mechanism is also provided in the door body. When the door body is closed, the closing mechanism clamps the retaining ring.

[0009] Preferably, the pulling and closing mechanism includes a worm A, a worm wheel A, a transmission shaft and a lever. The transmission shaft is longitudinally located inside the door body and is rotationally connected thereto. The worm wheel A is located in the middle position of the transmission shaft and is fixedly connected thereto. The worm A is located on one side of the worm wheel A and is meshed therewith. The worm A is rotationally connected to the door body. Two levers are provided, which are respectively fixed on one end of the transmission shaft passing through the outside of the door body. The lever is inserted into the clamping strip, and the transmission shaft drives the lever to utilize the reaction force to drive the door body to open and close.

[0010] Preferably, the end of the lever away from the transmission shaft is a cylindrical structure, the clamping strip is a U-shaped structure, and its open end corresponds to the lever. A through groove is provided on the front side of the clamping strip, and the through groove is connected to the inside of the clamping strip, and the lever can enter the clamping strip through the through groove.

[0011] Preferably, a hand wheel A is installed after the main shaft of the worm A passes through the door body.

[0012] Preferably, the closing mechanism includes a worm B, a worm wheel B, a stud, a slider and a pressure block, the stud is located inside the door body and is rotationally connected thereto, the worm wheel B is fixed in the middle position of the stud, the worm B meshes with the worm wheel B, the main shaft of the worm B is rotationally connected to the door body, the upper and lower ends of the stud have opposite thread directions, two sliders are provided, which are respectively installed on the upper and lower ends of the stud and are threadedly connected thereto, the slider is slidingly connected to the door body, both ends of the slider are hinged with connecting rods, four pressure blocks are provided, which are located outside the door body and are rotationally connected to the door body, a pressure rod is fixedly installed at one end of the main shaft of the pressure block inside the door body, the end of the connecting rod away from the slider is hinged to the end of the pressure rod away from the main shaft of the pressure block, and when the slider is away from the worm wheel B, the connecting rod can squeeze the pressure rod to cause the pressure block to be stuck on the retaining ring.

[0013] Preferably, a plurality of slide rails are provided in the door body, and both ends of the slide block are clamped in the slide rails and slidably connected thereto.

[0014] Preferably, a surface of the pressing block close to the retaining ring is an inclined structure.

[0015] Preferably, a hand wheel B is fixedly mounted on one end of the main shaft of the worm gear B that passes through the door body.

[0016] (III) Beneficial effects

[0017] The utility model provides a steel structure airtight civil air defense door. It has the following beneficial effects:

[0018] 1. The steel structure enclosed civil air defense door is provided with a pulling and closing mechanism. When the door body is closed, it is not necessary to close it completely. It is only necessary to place the lever in the card strip, and then rotate the hand wheel A to make the transmission shaft drive the lever to slowly rotate into the card strip. Then, due to the reaction force, the lever can pull the door body to close slowly. After closing, rotate the hand wheel B again. When the slider is away from the worm gear B, the connecting rod can squeeze the pressure rod to cause the pressure block to be stuck on the retaining ring. When the pressure block is stuck on the retaining ring, the contact force between the door body and the retaining ring will be tightened, thereby achieving the goal of closing the door body with little effort when the closing resistance is large, and the door body with a slope can also be easily closed.

[0019] 2. The steel structure closed civil air defense door is equipped with a retaining ring. The shape of the door body matches the door frame, so it can be sealed when closed. However, when the door body contacts the retaining ring, it can be sealed again, thus achieving a double-layer seal, which can ensure that harmful gases will not pass through the civil air defense door. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the utility model;

[0021] Figure 2 This is a structural separation diagram of the utility model;

[0022] Figure 3 For this utility model Figure 2 A magnified view of the structure at center A;

[0023] Figure 4 This is a schematic diagram of the internal structure of the door body of the utility model;

[0024] Figure 5 This is a connection diagram of the clamping strip and the lever of the utility model.

[0025] In the figure: 1. door frame; 2. door body; 3. retaining ring; 4. clamping strip; 5. pulling and closing mechanism; 501. worm A; 502. worm wheel A; 503. transmission shaft; 504. lever; 505. through slot; 506. handwheel A; 6. closing mechanism; 601. worm B; 602. worm wheel B; 603. stud; 604. slider; 605. handwheel B; 606. pressure block; 607. connecting rod; 608. pressure rod; 609. slide rail. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] It should be noted that all directional indications in the embodiments of the present application are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0028] The utility model provides a steel structure closed civil air defense door:

[0029] like Figure 1-5 As shown, it includes a door frame 1 and a door body 2, the door body 2 is hinged to the door frame 1, a retaining ring 3 is provided in the door frame 1, and clamping strips 4 are installed at both upper and lower ends of the door frame 1. A pulling and closing mechanism 5 is provided in the door body 2, and the output ends of the pulling and closing mechanism 5 are located above and below the door body 2. When the door body 2 is closed, it contacts the retaining ring 3. The pulling and closing mechanism 5 is connected to the clamping strip 4. A closing mechanism 6 is also provided in the door body 2. When the door body 2 is closed, the closing mechanism 6 clamps the retaining ring 3.

[0030] The door frame 1 is installed in the wall, the door body 2 and the door frame 1 are connected by a reinforced hinge, the retaining ring 3 is a metal ring with a certain thickness, and the inner ring area of ​​the retaining ring 3 is smaller than the area of ​​the door body 2. The clamping strip 4 is installed on the door frame 1 by welding.

[0031] The pulling and closing mechanism 5 includes a worm A501, a worm wheel A502, a transmission shaft 503 and a lever 504. The transmission shaft 503 is longitudinally located in the door body 2 and is rotationally connected thereto. The worm wheel A502 is located in the middle position of the transmission shaft 503 and is fixedly connected thereto. The worm A501 is located on one side of the worm wheel A502 and is meshed therewith. The worm A501 is rotationally connected to the door body 2. Two levers 504 are provided, which are respectively fixed on one end of the transmission shaft 503 passing through the outside of the door body 2. The lever 504 is inserted into the clamping strip 4. The transmission shaft 503 drives the lever 504 to utilize the reaction force to drive the door body 2 to open and close.

[0032] The interior of the door body 2 is a hollow structure, and the above structures are all located inside the door body 2 . Reinforced steel plates may be used for filling at positions that do not interfere with the structure to enhance the strength of the door body 2 .

[0033] The end of the lever 504 away from the transmission shaft 503 is a cylindrical structure, and the clamping strip 4 is a U-shaped structure, and its open end corresponds to the lever 504. A through groove 505 is provided on the front side of the clamping strip 4, and the through groove 505 is connected to the inside of the clamping strip 4. The lever 504 can enter the clamping strip 4 through the through groove 505.

[0034] The structure of the lever 504 can reduce the friction between the lever 504 and the inside of the clamping strip 4 .

[0035] After the main shaft of the worm A501 passes through the door body 2, a hand wheel A506 is installed.

[0036] Handwheel A506 is used for staff operation.

[0037] The closing mechanism 6 includes a worm B601, a worm wheel B602, a stud 603, a slider 604 and a pressure block 606. The stud 603 is located in the door body 2 and is rotatably connected thereto. The worm wheel B602 is fixed at a middle position between the stud 603 and the worm wheel B602. The worm B601 is meshed with the worm wheel B602. The main shaft of the worm B601 is rotatably connected to the door body 2. The upper and lower ends of the stud 603 have opposite thread directions. Two sliders 604 are provided, which are respectively mounted on the upper and lower ends of the stud 603 and are threadedly connected thereto. Block 604 is slidably connected to the door body 2, and connecting rods 607 are hinged at both ends of the slider 604. Four pressure blocks 606 are provided, which are located outside the door body 2 and are rotationally connected to the door body 2. A pressure rod 608 is fixedly installed at one end of the main shaft of the pressure block 606 located inside the door body 2. The end of the connecting rod 607 away from the slider 604 is hinged to the end of the pressure rod 608 away from the main shaft of the pressure block 606. When the slider 604 is away from the worm gear B602, the connecting rod 607 can squeeze the pressure rod 608 to cause the pressure block 606 to be stuck on the retaining ring 3.

[0038] There are four pressing blocks 606 in total, which are respectively located at the four corners of the door body 2. When the retaining ring 3 is connected, the four corners of the retaining ring 3 are also pressed tightly, so that the structural connection is balanced.

[0039] A plurality of slide rails 609 are provided in the door body 2 , and both ends of the slider 604 are clamped in the slide rails 609 and slidably connected thereto.

[0040] The surface of the pressing block 606 close to the retaining ring 3 is an inclined surface structure.

[0041] The inclined surface structure is provided, and when the pressing block 606 slowly contacts the retaining ring 3, the reaction force can be used to tighten the door body 2.

[0042] The main shaft of the worm gear B601 passes through one end of the door body 2 and a hand wheel B605 is fixedly mounted thereon.

[0043] When in use, when the door body 2 is closed, it is not necessary to close it completely. It is only necessary to place the lever 504 in the card strip 4, and then rotate the handwheel A506. The worm A501 rotates and drives the worm wheel A502 to rotate, so that the transmission shaft 503 drives the lever 504 to slowly rotate into the card strip 4. Then, due to the reaction force, the lever 504 can pull the door body 2 to close slowly. After closing, rotate the handwheel B605 again, the worm B601 drives the worm wheel B602 to rotate, thereby driving the stud 603 to rotate, so that the two sliders 604 move away from each other. When the slider 604 moves away from the worm wheel B602, the connecting rod 607 can squeeze the pressure rod 608 to cause the pressure block 606 to be stuck on the retaining ring 3. Due to the inclined structure of the pressure block 606, when the pressure block 606 is stuck on the retaining ring 3, the contact force between the door body 2 and the retaining ring 3 will be tightened.

[0044] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.

[0045] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A steel structure enclosed civil air defense door, comprising a door frame (1) and a door body (2), wherein the door body (2) is hinged to the door frame (1), and is characterized in that: The door frame (1) is provided with a retaining ring (3), and clamping strips (4) are installed at both upper and lower ends of the door frame (1). A pulling and closing mechanism (5) is provided in the door body (2), and the output ends of the pulling and closing mechanism (5) are located above and below the door body (2). When the door body (2) is closed, the pulling and closing mechanism (5) contacts the retaining ring (3), and the pulling and closing mechanism (5) is connected to the clamping strip (4). A closing mechanism (6) is also provided in the door body (2), and when the door body (2) is closed, the closing mechanism (6) clamps the retaining ring (3).

2. The steel structure enclosed civil air defense door according to claim 1 is characterized by: The pulling and closing mechanism (5) comprises a worm A (501), a worm wheel A (502), a transmission shaft (503) and a lever (504); the transmission shaft (503) is longitudinally located inside the door body (2) and is rotationally connected thereto; the worm wheel A (502) is located at a middle position of the transmission shaft (503) and is fixedly connected thereto; the worm A (501) is located on one side of the worm wheel A (502) and is meshed therewith; the worm A (501) is rotationally connected to the door body (2); two levers (504) are provided, which are respectively fixed on one end of the transmission shaft (503) passing through the outside of the door body (2); the lever (504) is inserted into the clamping strip (4); the transmission shaft (503) drives the lever (504) to drive the door body (2) to open and close by utilizing a reaction force.

3. The steel structure enclosed civil air defense door according to claim 2 is characterized by: The end of the lever (504) away from the transmission shaft (503) is a cylindrical structure, the clamping strip (4) is a U-shaped structure, the open end of which corresponds to the lever (504), and a through groove (505) is provided on the front side of the clamping strip (4), the through groove (505) is connected with the inside of the clamping strip (4), and the lever (504) can enter the clamping strip (4) through the through groove (505).

4. The steel structure enclosed civil air defense door according to claim 3 is characterized by: The main shaft of the worm gear A (501) passes through the door body (2) and a hand wheel A (506) is installed thereafter.

5. The steel structure enclosed civil air defense door according to claim 4 is characterized in that: The closing mechanism (6) comprises a worm B (601), a worm wheel B (602), a stud (603), a slider (604) and a pressure block (606); the stud (603) is located in the door body (2) and is rotatably connected thereto; the worm wheel B (602) and the stud (603) are fixed at an intermediate position; the worm B (601) is meshed with the worm wheel B (602); the main shaft of the worm B (601) is rotatably connected to the door body (2); the upper and lower ends of the stud (603) have opposite thread directions; two sliders (604) are provided, which are respectively mounted on the upper and lower ends of the stud (603) and are threadably connected thereto; The block (604) is slidably connected to the door body (2), and connecting rods (607) are hinged at both ends of the slider (604). Four pressure blocks (606) are provided, which are located outside the door body (2) and are rotationally connected to the door body (2). A pressure rod (608) is fixedly installed at one end of the main shaft of the pressure block (606) located inside the door body (2). The end of the connecting rod (607) away from the slider (604) is hinged to the end of the pressure rod (608) away from the main shaft of the pressure block (606). When the slider (604) is away from the worm gear B (602), the connecting rod can squeeze the pressure rod (608) to cause the pressure block (606) to be stuck on the retaining ring (3).

6. The steel structure enclosed civil air defense door according to claim 5, characterized in that: A plurality of slide rails (609) are arranged in the door body (2), and both ends of the slider (604) are clamped in the slide rails (609) and are slidably connected thereto.

7. The steel structure enclosed civil air defense door according to claim 6, characterized in that: A surface of the pressing block (606) close to the retaining ring (3) is an inclined surface structure.

8. The steel structure enclosed civil air defense door according to claim 7, characterized in that: A hand wheel B (605) is fixedly mounted on one end of the main shaft of the worm gear B (601) which passes through the door body (2).

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