Double-leaf protective airtight air-raid shelter door

Abstract

This utility model discloses a double-leaf protective airtight door, including a door frame, a first protective door, and a second protective door. The first and second protective doors are rotatably connected to the door frame, and when closed, they fill the entire door frame. The first protective door is provided with a locking rod, and the second protective door is provided with a first connecting groove corresponding to the locking rod. The first protective door is provided with a first transmission wheel and a second transmission wheel, both of which are in transmission engagement with the locking rod. When the first transmission wheel rotates, it pushes the locking rod to slowly extend from the first protective door; when the second transmission wheel rotates, it pushes the locking rod to quickly extend from the first protective door. This application enables the airtight door to be closed quickly in response to emergencies.

Description

Technical Field

[0001] This utility model belongs to the field of civil defense door technology, and in particular relates to a double-leaf protective airtight civil defense door. Background Technology

[0002] Protective airtight doors are generally swing-type. According to the number of door leaves, there are two types: single-leaf airtight doors and double-leaf airtight doors. Single-leaf doors are generally used for personnel entrances and exits with smaller dimensions, while double-leaf doors are generally used for vehicle entrances and exits with larger dimensions. In some air defense projects, double-leaf airtight doors are often required. Conventional airtight doors require the use of a rotating handwheel to drive a screw mechanism, which simultaneously operates multiple locking points to achieve door closure. The entire process takes 3-5 minutes. For example, the inner linkage handwheel of the GHSFM6030 (6) type movable threshold door has a diameter of 400mm and requires an operating torque of 80-120N・m. In emergency situations, personnel are prone to operational errors due to tension. Utility Model Content

[0003] The summary section of this application is intended to provide a brief overview of the concepts, which will be described in detail in the detailed description section below. This summary section is not intended to identify key or essential features of the claimed technical solutions, nor is it intended to limit the scope of the claimed technical solutions.

[0004] In order to overcome the shortcomings of the prior art, this utility model provides a double-leaf protective airtight door.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a double-leaf protective airtight door, comprising a door frame, a first protective door, and a second protective door, wherein the first and second protective doors are rotatably connected to the door frame, and when closed, the first and second protective doors fill the entire door frame; the first protective door is provided with a locking rod, and the second protective door is provided with a first connecting groove corresponding to the locking rod; the first protective door is provided with a first transmission wheel and a second transmission wheel, both of which are in transmission engagement with the locking rod; when the first transmission wheel rotates, it pushes the locking rod to slowly extend from the first protective door; when the second transmission wheel rotates, it pushes the locking rod to quickly extend from the first protective door.

[0006] Furthermore, the first protective door is provided with a first cavity, the locking rod is located in the first cavity, the locking rod is provided with a first connecting rod, the first connecting rod is provided with a transmission rod, and the first transmission wheel and the second transmission wheel are respectively located on both sides of the transmission wheel.

[0007] Furthermore, the first protective door is provided with a second cavity, which is located on one side of the first cavity. The second transmission wheel contacts the transmission rod to form a transmission engagement. The second transmission wheel is provided with a first connecting shaft, which passes through the second cavity. The second cavity is provided with a counterweight block that drives the second transmission wheel to rotate.

[0008] Furthermore, one end of the first connecting shaft is provided with a rotating wheel, the rotating wheel is provided with a third annular groove, a terminal is provided in the third annular groove, a wire rope is connected to the terminal, and one end of the wire rope is fixed to the counterweight.

[0009] Furthermore, a first movable groove is provided on the side wall of the second cavity, a support plate is provided in the first movable groove, a counterweight is placed on the support plate, a push rod is provided on the support plate, the push rod passes through the first movable groove, and a first spring is provided on the push rod.

[0010] Furthermore, the first protective door is provided with a first groove, one end of the push rod is inserted into the first groove, and a baffle is provided in the first groove, which is slidably connected to the inner wall of the first groove.

[0011] Furthermore, the first transmission wheel is provided with a second connecting shaft, which extends out of the first cavity, and a handwheel is provided at one end of the second connecting shaft; a movable block is provided in the first cavity, and the movable block is in transmission cooperation with the first transmission wheel; a protrusion is provided on the transmission rod, and the movable block is located on one side of the protrusion.

[0012] Furthermore, the bottom of the transmission rod is provided with a protrusion, and the protrusion is provided with multiple second grooves. After the first transmission wheel moves to the bottom of the protrusion, it forms a transmission engagement with the protrusion.

[0013] Furthermore, a mounting block is provided inside the first cavity, the mounting block is provided with multiple ratchet teeth, the mounting block is provided with a second connecting rod, the inner wall of the first cavity is provided with a second connecting groove for the second connecting rod to move, one end of the second connecting rod is provided with a second spring, and the mounting block is located on one side of the first transmission wheel.

[0014] Furthermore, the first protective door is provided with a guide tube, and the second connecting shaft passes through the guide tube; the second connecting shaft is provided with a second movable groove, the second movable groove is provided with a positioning plate, the positioning plate is provided with a push plate, the push plate passes through the second connecting shaft, and the push plate is provided with a third spring; the inner wall of the guide tube is provided with a first annular groove and a second annular groove corresponding to the positioning plate.

[0015] The advantage of this utility model is that it provides a double-leaf protective airtight door that can be closed quickly. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application.

[0017] Furthermore, throughout the accompanying drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the elements are not necessarily drawn to scale.

[0018] In the attached diagram:

[0019] Figure 1 This is a schematic diagram of the structure of a double-leaf protective airtight door in one embodiment of the present invention.

[0020] Figure 2 for Figure 1 Cross-sectional view of the first cavity of the double-leaf protective airtight door in the illustrated embodiment. Figure 1 .

[0021] Figure 3 for Figure 2 Enlarged view of point A in the image.

[0022] Figure 4 for Figure 1 Cross-sectional view of the first cavity of the double-leaf protective airtight door in the illustrated embodiment. Figure 2 .

[0023] Figure 5 for Figure 4 Enlarged view of point B in the image.

[0024] Figure 6 for Figure 1 A cross-sectional view of the second cavity of the double-leaf protective airtight door in the illustrated embodiment.

[0025] Figure 7 for Figure 6 Enlarged view of point C in the image.

[0026] Figure 8 for Figure 1 A cross-sectional view of the support plate of the double-leaf protective airtight door in the illustrated embodiment.

[0027] Figure 9 for Figure 8 Enlarged view of point D in the image.

[0028] Figure 10 for Figure 1 A cross-sectional view of the mounting block of the double-leaf protective airtight door in the illustrated embodiment.

[0029] Figure 11 for Figure 10 Enlarged view of point E in the image.

[0030] Figure 12 for Figure 1 A cross-sectional view of the second connecting shaft of the double-leaf protective airtight door in the illustrated embodiment.

[0031] Figure 13 for Figure 12 Enlarged view of point F in the image.

[0032] The meanings of the reference numerals in the figure are as follows:

[0033] 101. Door frame; 102. First protective door; 103. Second protective door; 104. Locking rod; 105. First cavity; 106. First connecting groove; 107. Clearance groove; 108. First connecting rod; 109. Transmission rod; 110. First transmission wheel; 111. Second transmission wheel; 112. Movable block; 113. Protrusion; 114. Mounting block; 115. Protrusion; 116. Second connecting rod; 117. Rotating wheel; 1171. Third annular groove; 18. Terminal; 119. Wire rope; 120. Counterweight; 121. Second cavity; 122. Buffer spring; 123. Support plate; 124. First spring; 125. Push rod; 126. Baffle; 127. Handwheel; 128. Conduit; 1281. First annular groove; 1282. Second annular groove; 129. Second spring; 130. Second connecting shaft; 131. Positioning plate; 132. Push plate; 133. Third spring; 134. First groove. Detailed Implementation

[0034] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0035] It should also be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other.

[0036] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.

[0037] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0038] The names of messages or information exchanged between multiple devices in the embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of such messages or information.

[0039] This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0040] like Figure 1-13As shown, a double-leaf protective airtight door includes a door frame 101, a first protective door 102, and a second protective door 103. The first protective door 102 and the second protective door 103 are rotatably connected to the door frame 101. When the first protective door 102 and the second protective door 103 are closed, they fill the entire door frame 101. The first protective door 102 is provided with a locking rod 104, and the second protective door 103 is provided with a first connecting groove 106 corresponding to the locking rod 104. The first protective door 102 is provided with a first transmission wheel 110 and a second transmission wheel 111. Both the first transmission wheel 110 and the second transmission wheel 111 are in transmission engagement with the locking rod 104. When the first transmission wheel 110 rotates, it pushes the locking rod 104 to slowly extend from the first protective door 102. When the second transmission wheel 111 rotates, it pushes the locking rod 104 to quickly extend from the first protective door 102.

[0041] Specifically, the first protective door 102 is provided with a first cavity 105, the locking rod 104 is located in the first cavity 105, the locking rod 104 is provided with a first connecting rod 108, the first connecting rod 108 is provided with a transmission rod 109, and the first transmission wheel 110 and the second transmission wheel 111 are respectively located on both sides of the transmission wheel; in order to ensure the closing effect of the first protective door 102 and the second protective door 103, the locking rod 104 is provided with two sets, which are respectively located at the top and bottom of the first cavity 105, so that the air defense door can be closed from multiple positions; the second protective door 103 is provided with a relief groove 107 corresponding to the transmission rod 109, so that the locking rod 104 has sufficient travel movement.

[0042] The first protective door 102 is provided with a second cavity 121, which is located on one side of the first cavity 105. The second transmission wheel 111 contacts the transmission rod 109 to form a transmission engagement. The engagement method between the second transmission wheel 111 and the transmission rod 109 is the same as the gear and rack engagement method in the prior art. The second transmission wheel 111 is provided with a first connecting shaft, which passes through the second cavity. One end of the first connecting shaft is provided with a rotating wheel 117, and the rotating wheel 117 is provided with a third annular groove 1171. A terminal 118 is provided in the third annular groove 1171, and a wire rope 119 is connected to the terminal 118. A counterweight 120 is fixedly connected to the other end of the wire rope 119. A buffer spring 122 is provided at the bottom of the second cavity 121 to reduce the impact of the counterweight 120 on the bottom surface of the second cavity 121.

[0043] The second cavity 121 has a first movable groove on its side wall, and a support plate 123 is provided in the first movable groove. A counterweight 120 is placed on the support plate 123. A push rod 125 is provided on the support plate 123. The push rod 125 passes through the first movable groove and is provided with a first spring 124. The first protective door 102 has a first groove 134. One end of the push rod 125 passes through the first groove 134. A baffle 126 is provided in the first groove 134. The baffle 126 is slidably connected to the inner wall of the first groove 134. The baffle 126 has a protrusion to facilitate the movement of the baffle 126.

[0044] When an emergency requires the air-raid shelter door to be closed quickly, the baffle 126 is pushed to move, exposing the push rod 125. Pushing the push rod 125 causes the support plate 123 to enter the first movable groove. The counterweight 120 loses its support and falls down. The wire rope 119 pulls the terminal 118 to move, and the rotating wheel 117 rotates, driving the second transmission wheel 111 to rotate. The second transmission wheel 111 directly drives the transmission rod 109 to move. The transmission rod 109 drives the locking rod 104 to move, causing the locking rod 104 to quickly insert into the first connecting groove 106, connecting the first protective door 102 and the second protective door 103 together, thus avoiding errors caused by manual operation.

[0045] The baffle 126 is designed to prevent the push rod 125 from being touched during normal use of the air-raid shelter door, thus ensuring the normal use of the air-raid shelter door.

[0046] Furthermore, the first transmission wheel 110 is provided with a second connecting shaft 130, which extends out of the first cavity 105. One end of the second connecting shaft 130 is provided with a handwheel 127. The first cavity 105 is provided with a movable block 112, which is slidably connected to the inner wall of the first cavity 105 and is in transmission cooperation with the first transmission wheel 110. The transmission rod 109 is provided with a protrusion 113, and the movable block 112 is located on one side of the protrusion 113.

[0047] The bottom of the transmission rod 109 is provided with a protrusion 115, and the protrusion 115 is provided with multiple second grooves. After the first transmission wheel 110 moves to the bottom of the protrusion 115, it forms a transmission engagement with the protrusion 115.

[0048] The first cavity 105 is provided with a mounting block 114, which has multiple ratchet teeth and a second connecting rod 116. The inner wall of the first cavity 105 is provided with a second connecting groove for the second connecting rod 116 to move. One end of the second connecting rod 116 is provided with a second spring 129, which abuts against the end face of the second connecting groove. The mounting block 114 is located on one side of the first transmission wheel 110.

[0049] The first protective door 102 is provided with a conduit 128, and the second connecting shaft 130 passes through the conduit 128; the second connecting shaft 130 is provided with a second movable groove, the second movable groove is provided with a positioning plate 131, the positioning plate 131 is provided with a push plate 132, the push plate 132 passes through the second connecting shaft 130, and the push plate 132 is provided with a third spring 133; the inner wall of the conduit 128 is provided with a first annular groove 1281 and a second annular groove 1282 corresponding to the positioning plate 131.

[0050] When the air defense door is closed, after the first protective door 102 and the second protective door 103 are aligned, the handwheel 127 is turned to make the first transmission wheel 110 rotate. At this time, the first transmission wheel 110 is at the bottom of the movable block 112 and forms a transmission engagement with the transmission block. The rotation of the first transmission wheel 110 drives the movable block 112 to move. The movable block 112 abuts against the protrusion 113 and pushes the protrusion 113 to move. The transmission rod 109 drives the locking rod 104 to move and insert into the first connecting groove 106. During the movement, the transmission rod 109 contacts the ratchet on the mounting block 114 and uses the ratchet to fix the locking rod 104, keeping the air defense door in the closed state.

[0051] When the air-raid shelter door is opened, the push plate 132 is pushed to move the positioning plate 131 into the second movable groove. The handwheel 127 is pushed into the first cavity 105, and the second connecting shaft 130 moves, causing the positioning plate 131 to move to the position of the second annular groove 1282. The positioning plate 131 is inserted into the second annular groove 1282 to position the second connecting shaft 130. The first transmission wheel 110 moves into the first cavity 105 to push the mounting block 114 to move. The mounting block 114 disengages from the protrusion 115. The first transmission wheel 110 moves to the bottom of the protrusion 115 and forms a transmission engagement with the protrusion 115. The handwheel 127 is rotated in the opposite direction, and the first transmission wheel 110 drives the transmission rod 109 to move into the first cavity 105. The locking rod 104 disengages from the first connecting groove 106.

[0052] By setting up the steel wire rope 119 and the movable block 112, the two methods of driving the locking rod 104 to move, namely the counterweight block 120 and the handwheel 127, are relatively independent and do not affect each other, thus meeting the usage requirements of the air defense door under different circumstances.

[0053] The above description is merely a selection of preferred embodiments of this disclosure and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in the embodiments of this disclosure is not limited to the specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in the embodiments of this disclosure.

Claims

1. A double-leaf protective and airtight civil defense door, comprising a door frame, a first protective door and a second protective door, the first protective door and the second protective door being rotationally connected to the door frame, the first protective door and the second protective door filling the entire door frame when closed; characterized in that: The first protective door is provided with a locking rod, and the second protective door is provided with a first connecting groove corresponding to the locking rod. The first protective door is provided with a first transmission wheel and a second transmission wheel. Both the first transmission wheel and the second transmission wheel are in transmission engagement with the locking rod. When the first transmission wheel rotates, it pushes the locking rod to slowly extend from the first protective door; when the second transmission wheel rotates, it pushes the locking rod to quickly extend from the first protective door.

2. The double-leaf protective sealed civil defense door according to claim 1, characterized in that: The first protective door has a first cavity, the locking rod is located in the first cavity, the locking rod has a first connecting rod, the first connecting rod has a transmission rod, and the first transmission wheel and the second transmission wheel are respectively located on both sides of the transmission wheel.

3. The double-leaf protective sealed civil defense door according to claim 2, characterized in that: The first protective door is provided with a second cavity, which is located on one side of the first cavity. The second transmission wheel contacts the transmission rod to form a transmission engagement. The second transmission wheel is provided with a first connecting shaft, which passes through the second cavity. The second cavity is provided with a counterweight block that drives the second transmission wheel to rotate.

4. The double-leaf protective sealed civil defense door according to claim 3, characterized in that: The first connecting shaft has a rotating wheel at one end, a third annular groove on the rotating wheel, a terminal in the third annular groove, a wire rope connected to the terminal, and one end of the wire rope fixed to the counterweight.

5. The double-leaf protective sealed civil defense door according to claim 4, characterized in that: The second cavity sidewall is provided with a first movable groove, the first movable groove is provided with a support plate, the counterweight is placed on the support plate, the support plate is provided with a push rod, the push rod passes through the first movable groove, and the push rod is provided with a first spring.

6. The double-leaf protective sealed civil defense door according to claim 5, characterized in that: The first protective door is provided with a first groove, one end of the push rod passes through the first groove, and a baffle is provided in the first groove, the baffle being slidably connected to the inner wall of the first groove.

7. The double-leaf protective sealed civil defense door according to claim 2, characterized in that: The first transmission wheel is provided with a second connecting shaft, which extends out of the first cavity, and a handwheel is provided at one end of the second connecting shaft; a movable block is provided in the first cavity, and the movable block is in transmission cooperation with the first transmission wheel; a protrusion is provided on the transmission rod, and the movable block is located on one side of the protrusion.

8. The double-leaf protective sealed civil defense door according to claim 7, characterized in that: The bottom of the transmission rod is provided with a protrusion, and the protrusion is provided with a plurality of second grooves. After the first transmission wheel moves to the bottom of the protrusion, it forms a transmission engagement with the protrusion.

9. The double-leaf protective sealed civil defense door according to claim 8, characterized in that: The first cavity is provided with a mounting block, which has multiple ratchet teeth and a second connecting rod. The inner wall of the first cavity is provided with a second connecting groove for the second connecting rod to move. One end of the second connecting rod is provided with a second spring. The mounting block is located on one side of the first transmission wheel.

10. The double-leaf protective sealed civil defense door according to claim 9, characterized in that: The first protective door is provided with a guide tube, and the second connecting shaft passes through the guide tube; the second connecting shaft is provided with a second movable groove, the second movable groove is provided with a positioning plate, the positioning plate is provided with a push plate, the push plate passes through the second connecting shaft, and the push plate is provided with a third spring; the inner wall of the guide tube is provided with a first annular groove and a second annular groove corresponding to the positioning plate.

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