An air defense door closing structure and its manufacturing process

Abstract

The present application relates to a closing structure for a civil air defense door and its manufacturing process, belonging to the technical field of civil air defense doors. The closing structure of the civil air defense door includes a sliding rod and a door closer, and a connecting rod is arranged between the door closer and the sliding rod; the door closer includes a housing, a pushing member and a reset member; the pushing member is used to compress the reset member when opening the door, and the reset member is used to automatically reset and close the door automatically when closing the door; a locking assembly is arranged on the pushing member, and the locking assembly includes a locking turntable, a locking card member and a fixing member. The central axis of the fixing member is collinear with the central axis of the locking turntable, and the fixing member and the locking turntable are arranged at intervals along their radial directions. The outer end of the locking card member can abut against the inner wall of the fixing member. The present application realizes the closing structure through the sliding rod, the door closer and the connecting rod. Through the setting of the locking assembly, when the door is opened too fast, the door will be automatically locked, so that the door can be locked when it is subjected to a huge impact, preventing the door from being pushed open.

Description

Technical Field

[0001] This application relates to the technical field of civil air defense doors, and in particular to a closing structure of a civil air defense door and its manufacturing process. Background Art

[0002] A door closer is a hydraulic device similar to a spring on the door head. When the door is opened, it can be released after being compressed to automatically close the door, acting like a spring door, ensuring that after the door is opened, it can be accurately and timely closed to the initial position.

[0003] Currently, the basic components of a hydraulic door closer include a support and guide member, a transmission, a return spring, a one-way valve, a rack plunger, a throttle valve core, and a housing, end caps, sealing rings, and connecting rods. The housing and connecting rods play the role of fixing the door closer and connecting the door leaf and the door frame. The working principle of the door closer is as follows: When the door is opened, the door body drives the connecting rod to move, causing the transmission gear to rotate and driving the rack plunger to move to the right. During the rightward movement of the plunger, the spring is compressed, and the hydraulic oil in the right chamber is also pressurized. The one-way valve ball on the left side of the plunger opens under the action of the oil pressure, and the hydraulic oil in the right chamber flows to the left chamber through the one-way valve. When the opening process is completed, since the spring is compressed during the opening process, the accumulated elastic potential energy is released, pushing the plunger to the left, driving the transmission gear and the door closer connecting rod to rotate, and closing the door.

[0004] Regarding the above related technologies, door closers often achieve the effects of rapid opening and slow closing. However, when there is a large impact outside the civil air defense door, the rapid opening setting makes the civil air defense door unable to prevent the impact. Under the impact force, the door will be directly pushed open by the impact. At this time, the door closer needs to be able to lock the civil air defense door when receiving a sudden impact. Summary of the Invention

[0005] The purpose of this application is to provide a closing structure of a civil air defense door and its manufacturing process that can adjust the way of opening and closing the door.

[0006] In a first aspect, a closing structure of a civil air defense door provided by this application adopts the following technical solution:

[0007] A closing structure for a civil air defense door, comprising a sliding rod and a door closer. A slider is slidably arranged on the sliding rod. A connecting rod is arranged between the door closer and the sliding rod, and two ends of the connecting rod are respectively connected to the door closer and the slider. The door closer includes a housing, and a pushing member and a reset member connected to each other on the housing. The pushing member includes a gear and a rack arranged in the housing. The gear and the rack are meshed with each other, and one end of the rack is connected to the reset member. The reset member includes a reset spring, and two ends of the reset spring are respectively connected to the housing and the pushing member. A transmission shaft is arranged in the middle of the gear, and two ends of the transmission shaft are respectively rotatably connected to the upper and lower sides of the housing. One end of the transmission shaft is fixedly connected to the connecting rod in the circumferential direction, and a locking assembly is arranged at the other end. The locking assembly includes a locking turntable. A locking card is slidably arranged on the locking turntable, and the locking card can move radially along the locking turntable. The locking turntable is fixedly connected to the transmission shaft in the circumferential direction, and the transmission shaft can drive the locking turntable to rotate. A fixing member is sleeved on the outer peripheral side of the locking turntable. The central axis of the fixing member is collinear with the central axis of the locking turntable, and the fixing member and the locking turntable are spaced apart from each other along their radial directions. The outer end of the locking card can abut against the inner wall of the fixing member.

[0008] By adopting the above technical solution, the arrangement of the door closer, the sliding rod and the connecting rod realizes the function of automatically closing the door. The locking assembly is arranged on the transmission shaft of the door closer. When the rotation speed of the transmission shaft is slow, the locking turntable will drive the locking card to rotate. When the rotation speed of the transmission shaft is fast, the locking card will move radially outward of the locking turntable under the action of centrifugal force, so that the locking card abuts against the fixing member, and the locking card locks the locking turntable, and further locks the transmission shaft connected to the locking turntable, so that the door closer makes the whole closing structure unable to move, and finally locks the door. When the door is impacted greatly, the door will open at a high speed, making the speed of the transmission shaft fast. Then the locking assembly will lock the door to prevent the door from being pushed open.

[0009] Optionally, a locking hole is formed in the fixing member. The locking turntable is arranged in the locking hole, and the locking turntable is spaced apart from the hole wall of the locking hole. A plurality of card slots are arranged on the hole wall of the locking hole along the circumferential direction. The bottom surface of the card slot and one side surface together form an arc-shaped curved surface. The arc-shaped surfaces of the plurality of card slots are all arranged in the clockwise or counterclockwise direction towards the hole wall of the locking hole. When the locking turntable rotates, the locking card can slide radially along the locking turntable and can be embedded in the card slot.

[0010] By adopting the above technical solution, the provision of the locking holes on the fixing member can provide an installation position for the locking turntable, enabling the locking turntable to rotate in the locking holes. A number of card slots are opened on the inner wall of the locking holes in the clockwise or counterclockwise direction. When the locking turntable rotates clockwise or counterclockwise, the locking card member can be snapped into the card slots under the action of centrifugal force, and when the locking turntable rotates in the reverse direction, the locking card member can be disengaged from the card slots and slide back into the locking turntable, so that the door will be locked when it is quickly opened and can be reset after the door is closed, ensuring that the door can be opened normally.

[0011] Optionally, a transmission hole is radially opened at one end of the transmission shaft. The locking assembly includes a transmission plug block. The axis of the transmission plug block is collinear with the axis of the transmission hole. The transmission plug block is inserted into the transmission shaft through the transmission hole. The side surface of the transmission plug block away from the housing is connected to the locking turntable. The axis of the transmission shaft is collinear with the axis of the locking turntable; a locking slideway is opened on the housing along the axis direction of the transmission hole. The transmission plug block is slidably connected to the side wall of the locking slideway, and the transmission plug block is arranged in the locking slideway.

[0012] By adopting the above technical solution, the provision of the transmission plug block and the transmission hole can enable the transmission shaft to drive the transmission plug block to rotate around the axis of the transmission shaft. The locking turntable is fixed on the transmission plug block to ensure that the locking turntable can rotate around the axis of the transmission shaft. The provision of the locking slideway enables the transmission plug block to slide and insert into the transmission hole, so that the locking turntable and the transmission shaft can be disassembled, and thus the locking assembly can be selected to be connected to the door closer according to needs.

[0013] Optionally, the locking assembly includes a fixing box. The fixing member is fixed on the inner wall of the fixing box. One side of the fixing box is fixed to the transmission plug block. First guiding slideway and a second guiding slideway parallel to the locking slideway are opened on the housing. The opposite side walls of the fixing box are respectively slidably connected to the inner walls of the first guiding slideway and the second guiding slideway.

[0014] By adopting the above technical solution, the provision of the fixing box in cooperation with the first guiding slideway and the second guiding slideway enables the fixing box to slide along the first guiding slideway and the second guiding slideway. The fixing of the fixing box and the transmission plug-in can make the fixing box and the transmission plug-in slide synchronously, ensuring that the fixing member and the locking turntable can move synchronously and keeping the installation accuracy of the fixing member and the locking turntable unchanged.

[0015] Optionally, the reset member further includes a reset sealing plate. The reset sealing plate is arranged between the reset spring and the pushing member. A diversion channel is opened on the housing. Both ends of the diversion channel are respectively communicated to both sides of the reset sealing plate. A speed regulating valve is arranged on the housing, and the speed regulating valve is communicated to the diversion channel.

[0016] By adopting the above technical solution, the reset sealing plate divides the cavities in the shell from each other, and through the action of the diversion pipeline, the cavities on both sides of the reset sealing plate can communicate with each other. A speed regulating valve is set to change the flow rate of the hydraulic oil between the cavities on both sides of the reset sealing plate, so that there is resistance to the movement of the pushing member by the hydraulic oil. By adjusting the speed regulating valve, the resistance of the pushing member can be changed, and thus the adjustment of the resistance during door opening and closing can be realized.

[0017] Optionally, a switching channel is provided on the shell, both ends of the switching channel communicate with both sides of the reset sealing plate, a switching plug is provided on the shell, the switching plug is rotatably connected to the shell, one end of the switching plug closes the switching channel, and a guiding through hole is provided on the switching plug. When the switching plug is rotated, the guiding through hole can communicate with the switching channel.

[0018] By adopting the above technical solution, with the setting of the switching channel, the switching channel can be conducted or closed by the switching plug. When the switching channel is conducted, the hydraulic oil flows out from the switching channel to ensure that there is no resistance during door opening and closing; when the switching channel is closed, the hydraulic oil can only flow through the diversion channel, resulting in resistance during door opening and closing.

[0019] Optionally, an auxiliary member is further provided on the shell, the auxiliary member includes an auxiliary spring and an auxiliary sealing plate, the auxiliary spring is arranged on the side of the pushing member away from the reset member, one end of the auxiliary spring is arranged on the shell, the other end is arranged on the auxiliary sealing plate, one side of the auxiliary sealing plate is connected to the reset spring, and the other side is fixed to the pushing member.

[0020] By adopting the above technical solution, the setting of the auxiliary member can assist the reset spring to reset the pushing member through the auxiliary spring, so that the reset spring can still reset the pushing member when the elastic force decreases.

[0021] In the second aspect, a manufacturing process of a closing structure for a civil air defense door provided by the present application adopts the following technical solution:

[0022] A manufacturing process of a closing structure for a civil air defense door includes the following steps:

[0023] S1: Process the steel into corresponding blanks;

[0024] S2: Deep processing: Adopt a numerical control machine tool for deep processing to process the shell, front end cover, rear end cover, gear, rack, reset sealing plate, auxiliary sealing plate and locking component;

[0025] S3: Assembly: Assemble the shell, front end cover, rear end cover, gear, rack, reset sealing plate, auxiliary sealing plate and locking component;

[0026] S4: Pour hydraulic fluid into the housing.

[0027] By adopting the above technical solution, through the independent processing and assembly of each part, the door closer is convenient for disassembly and maintenance.

[0028] Optionally, the deep processing step further includes: electroplating processing: galvanizing is carried out on the housing, front end cover, rear end cover, gear, rack, reset sealing plate, auxiliary sealing plate and locking assembly.

[0029] By adopting the above technical solution, the electroplating processing can slow down the oxidation process of the parts and increase the service life of each part.

[0030] Optionally, before the step of processing the steel into the corresponding blank, it further includes: performing high-temperature treatment on the blank.

[0031] By adopting the above technical solution, performing high-temperature treatment on the steel can ensure the strength of the steel and improve the service life of the door closer.

[0032] In summary, the present application includes at least one of the following beneficial technical effects:

[0033] 1. Through the setting of the locking assembly, when the door is opened too fast, it will automatically lock the door, so that the door can be locked when it is subjected to a huge impact, preventing the door from being pushed open.

[0034] 2. The setting of the transmission insert block and the locking slideway enables the locking assembly to be connected to the door closer as needed.

[0035] 3. Through the setting of the switching channel, the switching channel can be conducted or closed by the switching plug. When the switching channel is conducted, the hydraulic fluid flows out from the switching channel, ensuring that there is no resistance when opening and closing the door; when the switching channel is closed, the hydraulic fluid can only flow through the diversion channel, making there be resistance when opening and closing the door; enabling the door to be opened and closed without resistance in case of emergency. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is the overall structural schematic diagram of the civil air defense door closing structure in the present application.

[0037] Figure 2 is the overall structural schematic diagram of the slide bar in the present application.

[0038] Figure 3 is the overall structural schematic diagram of the door closer in the present application.

[0039] Figure 4 is the sectional structural schematic diagram of the door closer in the present application.

[0040] Figure 5It is an exploded structural schematic diagram of the locking component in the present application.

[0041] Figure 6 It is an overall structural schematic diagram of the fixing member in the present application.

[0042] Figure 7 It is an overall structural schematic diagram of another perspective of the door closer in the present application.

[0043] Figure 8 It is a sectional structural schematic diagram of another perspective of the door closer in the present application.

[0044] Figure 9 It is an overall structural schematic diagram of the switching plug-in in the present application.

[0045] In the figure, 1 is the sliding rod; 11 is the slider; 12 is the chute; 2 is the door closer; 21 is the housing; 211 is the mounting hole; 22 is the pushing member; 221 is the gear; 222 is the rack; 223 is the transmission shaft; 224 is the transmission hole; 23 is the reset member; 231 is the reset spring; 232 is the reset sealing plate; 24 is the auxiliary member; 241 is the auxiliary spring; 242 is the auxiliary sealing plate; 25 is the front end cover; 26 is the rear end cover; 3 is the connecting rod; 4 is the locking component; 41 is the locking card; 42 is the locking turntable; 43 is the fixing member; 431 is the locking hole; 432 is the card slot; 44 is the transmission plug; 441 is the sliding shaft; 442 is the connecting shaft; 443 is the mounting plate; 45 is the locking slideway; 46 is the fixing box; 47 is the first guiding slideway; 48 is the second guiding slideway; 5 is the diversion channel; 51 is the speed regulating valve; 52 is the switching channel; 53 is the switching plug-in; 54 is the guiding through hole. Detailed implementation manners

[0046] The following will further elaborate on the present application in conjunction with the attached Figure 1 - attached Figure 9 , and make a more detailed description of the present application.

[0047] A closing structure for a civil air defense door, referring to Figure 1 and Figure 2 , includes a sliding rod 1 and a door closer 2. The sliding rod 1 is horizontally arranged, and a chute 12 is opened along the length direction of the sliding rod 1 inside the sliding rod 1. A slider 11 is arranged inside the sliding rod 1, and the slider 11 is slidably connected to the two side walls of the chute 12, so that the slider 11 can slide along the length direction of the sliding rod 1; the door closer 2 is arranged on one side of the sliding rod 1, and a connecting rod 3 is arranged between the door closer 2 and the sliding rod 1. One end of the connecting rod 3 is rotatably connected to the slider 11 of the sliding rod 1, and the other end is rotatably connected to the door closer 2, so that the connecting rod 3 connects the door closer 2 and the sliding rod 1.

[0048] Referring to Figure 3 and Figure 4, the door closer 2 includes a housing 21. An installation hole 211 is formed in the housing 21 along its own length direction for installing various parts. At both ends of the housing 21 along its own length direction, a front end cover 25 and a rear end cover 26 are respectively provided. External threads are provided on both the front end cover 25 and the rear end cover 26. Internal threads are provided on the two side hole walls of the installation hole 211 along the opening direction. The front end cover 25 and the rear end cover 26 are threadedly connected to the inner wall of the installation hole 211, so that the housing 21 can be connected to the front end cover 25 and the rear end cover 26.

[0049] Refer to Figure 4 , a pushing member 22 is arranged in the housing 21. The pushing member 22 includes a rack 222 and a gear 221. The rack 222 is installed in the installation hole 211 along the length direction of the housing 21, and the rack 222 is slidably connected to the inner wall of the installation hole 211, so that the rack 222 can slide along the opening direction of the installation hole 211 in the installation hole 211. The gear 221 meshes with the rack 222. Rotating the gear 221 can drive the rack 222 to slide on the inner wall of the installation hole 211. A transmission shaft 223 is arranged in the axial direction of the gear 221. Both ends of the transmission shaft 223 extend to the outside of the housing 21 along the axial direction of the gear 221. Both ends of the transmission shaft 223 are hermetically and rotatably connected to the housing 21.

[0050] Refer to Figure 4 , one end of the transmission shaft 223 is fixedly connected to the link 3 in the circumferential direction to realize the function of the door closing structure; a locking assembly 4 is arranged at the other end of the transmission shaft 223;

[0051] Refer to Figure 5 and Figure 6 , the locking assembly 4 includes a locking card 41, a locking turntable 42 and a fixing member 43. The locking card 41 is a sector block, and the locking turntable 42 is a disc lacking a sector block. The locking card 41 can be embedded in the notch of the locking turntable 42 and the locking card 41 can slide radially on the locking turntable 42. When the locking turntable 42 rotates slowly, the locking turntable 42 drives the locking card 41 to rotate. When the locking turntable 42 rotates quickly, the locking card 41 on the locking turntable 42 will slide radially along the locking turntable 42 under the action of centrifugal force.

[0052] Refer to Figure 5 and Figure 6, the fixing member 43 is a disc. A locking hole 431 is formed in the fixing member 43. The locking turntable 42 is coaxially arranged with the locking hole 431 and the locking turntable 42 is arranged in the locking hole 431. The outer peripheral side of the locking turntable 42 is spaced from the hole wall of the locking hole 431. A plurality of card slots 432 are circumferentially and evenly spaced on the hole wall of the locking hole 431. The bottom surface of the card slot 432 and one side surface together form an arc-shaped curved surface. The arc-shaped surfaces of the plurality of card slots 432 are all arranged in the clockwise or counterclockwise direction of the hole wall of the locking hole 431. When the locking turntable 42 rotates rapidly, the locking member 41 can slide on the locking turntable 42 and snap into the corresponding card slot 432, so that the locking member 41 can lock the locking turntable 42 and the fixing member 43.

[0053] Referring to Figure 5 , the locking assembly 4 further includes a transmission plug 44. A transmission plug 44 is arranged on the side of the locking turntable 42 close to the housing 21. The transmission plug 44 includes a sliding shaft 441, a connecting shaft 442 and a mounting plate 443. The axis of the connecting shaft 442 is parallel to the axis of the transmission shaft 223. The sliding shaft 441 and the mounting plate 443 are respectively and perpendicularly fixed at both ends of the connecting shaft 442, so that the transmission plug 44 is U-shaped. The locking turntable 42 is fixed on the transmission shaft 223. A transmission hole 224 is radially formed at one end of the transmission shaft 223 close to the locking assembly 4. The sliding shaft 441 can be inserted into the transmission hole 224, so that the transmission shaft 223 can drive the transmission plug 44 to rotate, and then drive the locking turntable 42 to rotate.

[0054] Referring to Figure 5 and Figure 6 , the locking assembly 4 further includes a fixing box 46. The fixing member 43 is fixed on the inner side wall of the fixing box 46 far from the housing 21. The fixing box 46 is used to fix the fixing member 43. One inner side wall in the fixing box 46 is fixed to the transmission plug 44, so that the fixing member 43 can move synchronously with the locking turntable 42, ensuring the matching relationship between the fixing member 43 and the locking turntable 42.

[0055] Referring to Figure 5 and Figure 7, on the housing 21, a first guiding slideway 47, a locking slideway 45 and a second guiding slideway 48 are provided on one side close to the locking assembly 4. The first guiding slideway 47, the locking slideway 45 and the second guiding slideway 48 are arranged in parallel, and the locking slideway 45 is arranged along the transmission radial direction and is collinear with the axis of the transmission hole 224. The sliding shaft 441 is slidably connected with the side wall of the locking slideway 45, so that the sliding shaft 441 can slide in the locking slideway 45 and slide into the transmission hole 224 to complete the clamping connection between the transmission shaft 223 and the transmission insert block 44; on the housing 21, a rotating groove is provided on one side of the locking slideway 45 close to the transmission shaft 223. The rotating groove is coaxially arranged with the transmission shaft 223 and the sliding shaft 441 can rotate with the transmission shaft 223 as the axis in the rotating groove to meet the rotation requirement of the locking turntable 42; the two opposite side walls of the fixed box 46 are slidably connected with the side walls of the corresponding first guiding slideway 47 and the second guiding slideway 48, so that the fixed box 46 can slide synchronously with the transmission plug-in to realize the installation of the locking assembly 4 and the transmission shaft 223.

[0056] Refer to Figure 4 , a reset member 23 and an auxiliary member 24 are arranged in the housing 21. The reset member 23 and the auxiliary member 24 are both arranged in the mounting hole 211 of the housing 21, and the reset member 23 and the auxiliary member 24 are respectively arranged on both sides of the pushing member 22 along the length direction of the housing 21; the reset member 23 includes a reset spring 231 and a reset sealing plate 232. The reset spring 231 is arranged along the length direction of the housing 21. One end of the reset spring 231 is connected with the front end cover 25, and the other end is connected with the reset sealing plate 232. The side of the reset sealing plate 232 away from the reset spring 231 is fixedly connected with one end of the rack 222 along the length of the rack 222, so that the reset spring 231 can push the rack 222 along the length direction of the rack 222; the auxiliary member 24 includes an auxiliary spring 241 and an auxiliary sealing plate 242. The auxiliary spring 241 is arranged along the length direction of the housing 21. One end of the auxiliary spring 241 is connected with the rear end cover 26, and the other end is connected with the auxiliary sealing plate 242. The side of the auxiliary sealing plate 242 away from the auxiliary spring 241 is fixedly connected with one end of the rack 222 along the length of the rack 222, so that the auxiliary spring 241 can assist the reset spring 231 to reset the rack 222 and reduce the situation of incomplete door closing caused by the loss of spring elastic force.

[0057] Refer to Figure 4 , the reset sealing plate 232 and the auxiliary sealing plate 242 are slidably arranged on the hole wall of the mounting hole 211, and the outer peripheral walls of the reset sealing plate 232 and the auxiliary sealing plate 242 are both attached to the hole wall of the mounting hole 211, ensuring that the reset sealing plate 232 and the auxiliary sealing plate 242 can slide along the opening direction of the mounting hole 211 and can also increase the sealing performance in the mounting hole 211.

[0058] Refer to Figure 8, a diversion channel 5 is formed in the housing 21, and two ends of the diversion channel 5 are respectively communicated with the cavity between the reset sealing plate 232 and the front end cover 25 and the cavity between the auxiliary sealing plate 242 and the rear end cover 26, so that the oil filled into the mounting hole 211 can flow between both sides of the pushing member 22; a speed regulating valve 51 is arranged on the housing 21, and an adjusting pipeline on the speed regulating valve 51 is connected in series to the diversion channel 5, so that the flow rate of the oil in the diversion channel 5 can be changed through the adjustment of the speed regulating valve 51, and further the opening and closing speeds of the door can be changed.

[0059] Referring to Figure 8 and Figure 9 , a switching channel 52 is formed in the housing 21, and two ends of the switching channel 52 are respectively communicated with the cavity between the reset sealing plate 232 and the front end cover 25 and the cavity between the auxiliary sealing plate 242 and the rear end cover 26, so that the oil filled into the mounting hole 211 can flow between both sides of the pushing member 22; a switching plug-in 53 is arranged on the housing 21, the switching plug-in 53 is a bolt provided with a through hole 54, and the through hole 54 on the switching plug-in 53 can be connected into the switching channel 52. When the switching plug-in 53 is rotated, the through hole 54 can be communicated with or closed to the switching channel 52. When the through hole 54 is communicated with the switching channel 52, the oil will flow through the switching channel 52 to make the diversion channel 5 ineffective, so that there is no resistance when opening and closing the door, and rapid opening and closing of the door can be realized; when the through hole 54 is closed to the switching channel 52, the oil can only flow through the diversion channel 5, so that there is resistance of the oil when opening and closing the door, and slow opening and closing of the door can be realized.

[0060] The implementation principle of the embodiment of the present application is as follows: the sliding rod 1 and the wall door closer are respectively installed on the civil air defense door and the door frame. When pushing open the civil air defense door, the slider 11 on the sliding rod 1 slides along the sliding groove 12, the connecting rod 3 rotates, the transmission shaft 223 of the door closer 2 rotates, so that the gear 221 rotates, the rack 222 is pushed to move, and further the reset spring 231 is compressed and the auxiliary spring 241 is stretched. After releasing the door, the reset spring 231 and the auxiliary spring 241 will reset the rack 222, so that the rack 222 drives the gear 221 to rotate, the transmission shaft 223 on the gear 221 rotates, drives the connecting rod 3 to rotate, and makes the slider 11 slide reversely to reset the civil air defense door;

[0061] When opening the door, the rack 222 moves rightward, and the oil in the right cavity flows into the left cavity through the diversion channel 5. By adjusting the speed regulating valve 51, the flow rate of the oil in the right cavity when opening the door can be changed, and further the resistance when opening the door can be changed; the effect when closing the door is the same as that when opening the door. By changing the damping when opening and closing the door through the speed regulating valve 51, the resistance when opening and closing the door can be changed;

[0062] When a door needs to be opened and closed quickly without resistance, rotate the switching plug-in 53 to connect the guide through-hole 54 and the switching channel 52 to each other, so that the hydraulic oil can flow freely between the right cavity and the left cavity, making the opening and closing of the door without resistance.

[0063] When the civil air defense door needs to withstand a major impact, slide the locking component 4 into the transmission shaft 223. At this time, when the door is slowly pushed open, the door can be pushed open. However, when receiving a huge impact, the locking component 4 will jam the transmission shaft 223 to prevent the impact from pushing the door open.

[0064] A manufacturing process for the closing structure of a civil air defense door includes the following steps:

[0065] S1: Heat-treat the steel to increase its strength; process the steel into corresponding blanks.

[0066] S2: Deep processing:

[0067] S21: Use a numerical control machine tool to process the blank to produce the housing 21, the front end cover 25, the rear end cover 26, the rack 222, the gear 221, the reset sealing plate 232, the auxiliary sealing plate 242, and the locking component 4.

[0068] S22: Detect the dimensions of each part to ensure that they can be assembled.

[0069] S23: Machine the mating threads on the qualified front end cover 25, rear end cover 26, and housing 21 so that the front end cover 25, rear end cover 26, and housing 21 can cooperate with each other.

[0070] S24: Galvanize each part to increase the service life of the parts.

[0071] S4: Assembly:

[0072] S41: Weld the two ends of the rack 222 to the reset sealing plate 232 and the auxiliary sealing plate 242 respectively.

[0073] S42: Install the welded rack 222 into the housing 21.

[0074] S43: Snap the auxiliary spring 241 onto the rear end cover 26 and install the rear end cover 26 on one side of the housing 21.

[0075] S44: Install the gear 221 into the housing 21 through a rotating seal and fix it to the rack 222.

[0076] S45: Install the locking component 4 on the housing 21.

[0077] S5: Pour in the oil fluid, pour hydraulic oil into the housing 21, snap the return spring 231 and the front end cover 25 together, and install the front end cover 25 on one side of the housing 21 to seal the housing 21;

[0078] S6: Detect the door closer 2. By turning the regulating valve and the switching plug-in 53, the sliding locking assembly 4 detects the states of various parts.

[0079] The embodiments of this specific implementation manner are all preferred embodiments of this application, and do not limit the protection scope of this application accordingly. The same parts are denoted by the same reference numerals. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. An air defense door closing structure, comprising a sliding rod (1) and a door closer (2), characterized in that, A slider (11) is slidably arranged on the sliding rod (1). A connecting rod (3) is arranged between the door closer (2) and the sliding rod (1). Two ends of the connecting rod (3) are respectively connected to the door closer (2) and the slider (11). The door closer (2) includes a housing (21), a pushing member (22) and a reset member (23) which are connected to each other on the housing (21). The pushing member (22) includes a gear (221) and a rack (222) arranged in the housing (21). The gear (221) and the rack (222) are meshed with each other, and one end of the rack (222) is connected to the reset member (23). The reset member (23) includes a reset spring (231). Two ends of the reset spring (231) are respectively connected to the housing (21) and the pushing member (22). The reset member (23) further includes a reset sealing plate (232). The reset sealing plate (232) is arranged between the reset spring (231) and the pushing member (22). A transmission shaft (223) is arranged in the middle of the gear (221). Two ends of the transmission shaft (223) are respectively rotatably connected to the upper and lower sides of the housing (21). One end of the transmission shaft (223) is fixedly connected to the connecting rod (3) in the circumferential direction, and a locking assembly (4) is arranged at the other end. The locking assembly (4) includes a locking turntable (42). A locking card (41) is slidably arranged on the locking turntable (42), and the locking card (41) can move radially along the locking turntable (42). The locking turntable (42) is fixedly connected to the transmission shaft (223) in the circumferential direction, and the transmission shaft (223) can drive the locking turntable (42) to rotate. A fixing member (43) is sleeved on the outer peripheral side of the locking turntable (42). The central axis of the fixing member (43) is collinear with the central axis of the locking turntable (42), and the fixing member (43) and the locking turntable (42) are arranged at intervals along their radial directions. The outer end of the locking card (41) can abut against the inner wall of the fixing member (43). An auxiliary member (24) is further arranged on the housing (21). The auxiliary member (24) includes an auxiliary spring (241) and an auxiliary sealing plate (242). The auxiliary spring (241) is arranged on the side of the pushing member (22) away from the reset member (23). One end of the auxiliary spring (241) is arranged on the housing (21), and the other end is arranged on the auxiliary sealing plate (242). One side of the auxiliary sealing plate (242) is connected to the reset spring (231), and the other side is fixed to the pushing member (22).

2. The air defense door closing structure according to claim 1, characterized in that, The fixing member (43) is provided with a locking hole (431), the locking turntable (42) is arranged in the locking hole (431), the locking turntable (42) is spaced from the hole wall of the locking hole (431), and a plurality of clamping grooves (432) are arranged on the hole wall of the locking hole (431) along the circumferential direction. The groove bottom surface and one side surface of the clamping groove (432) together form an arc-shaped curved surface, and the arc-shaped surfaces of the plurality of clamping grooves (432) are all arranged in the clockwise or counterclockwise direction of the hole wall of the locking hole (431); when the locking turntable (42) rotates, the locking member (41) can slide radially along the locking turntable (42) and can be embedded in the clamping groove (432).

3. The air defense door closing structure according to claim 1, characterized in that, One end of the transmission shaft (223) is radially provided with a transmission hole (224). The locking assembly (4) includes a transmission plug (44). The axis of the transmission plug (44) is collinear with the axis of the transmission hole (224). The transmission plug (44) is inserted into the transmission shaft (223) through the transmission hole (224). The side surface of the transmission plug (44) far from the housing (21) is connected to the locking turntable (42). The axis of the transmission shaft (223) is collinear with the axis of the locking turntable (42). The housing (21) is provided with a locking slideway (45) along the axis direction of the transmission hole (224). The transmission plug (44) is slidably connected to the side wall of the locking slideway (45), and the transmission plug (44) is arranged in the locking slideway (45).

4. The air defense door closing structure according to claim 3, characterized in that, The locking assembly (4) includes a fixing box (46). The fixing member (43) is fixed on the inner wall of the fixing box (46). One side of the fixing box (46) is fixed to the transmission plug (44). The housing (21) is provided with a first guiding slideway (47) and a second guiding slideway (48) parallel to the locking slideway (45). The opposite side walls of the fixing box (46) are respectively slidably connected to the inner walls of the first guiding slideway (47) and the second guiding slideway (48).

5. The air defense door closing structure according to claim 1, characterized in that, The housing (21) is provided with a diversion channel (5). Both ends of the diversion channel (5) are respectively communicated to both sides of the reset sealing plate (232). The housing (21) is provided with a speed regulating valve (51), and the speed regulating valve (51) is communicated to the diversion channel (5).

6. The air defense door closing structure according to claim 5, characterized in that, The housing (21) is provided with a switching channel (52). Both ends of the switching channel (52) are communicated to both sides of the reset sealing plate (232). The housing (21) is provided with a switching plug (53). The switching plug (53) is rotatably connected to the housing (21). One end of the switching plug (53) closes the switching channel (52). The switching plug (53) is provided with a through hole (54). When the switching plug (53) is rotated, the through hole (54) can communicate with the switching channel (52).

7. An air defense door closing structure manufacturing process for manufacturing the air defense door closing structure according to any one of claims 1-6, characterized in that, Including the following steps: S1: Process the steel into corresponding blanks; S2: Deep processing: Deep process using a numerically controlled machine tool to produce the housing (21), front end cover (25), rear end cover (26), gear (221), rack (222), reset sealing plate (232), auxiliary sealing plate (242), and locking assembly (4); S3: Assembly: Assemble the housing (21), front end cover (25), rear end cover (26), gear (221), rack (222), reset sealing plate (232), auxiliary sealing plate (242), and locking assembly (4); S4: Pour hydraulic oil into the outer shell.

8. The air defense door closing structure manufacturing process according to claim 7, characterized in that, During the deep processing step, it also includes: Electroplating process: Perform galvanizing on the housing (21), front end cover (25), rear end cover (26), gear (221), rack (222), reset sealing plate (232), auxiliary sealing plate (242), and locking assembly (4).

9. The air defense door closing structure manufacturing process according to claim 7, characterized in that, Before the step of processing the steel into the corresponding blank, it also includes: performing high-temperature treatment on the blank.

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