Steel clean door adjustable closer device

Abstract

The utility model relates to the technical field of door control hardware, disclose adjustable door closer device of steel clean door, including door frame, door closer shell, the inside of door closer shell is provided with round hole, the left side inside fixedly connected with buffer spring of door closer shell, the other end fixed mounting of buffer spring has plunger, the outer surface fixed mounting of plunger has stroke sealing ring, the right side outer surface fixed mounting of plunger has rack, the round hole upper end contact connection of door closer shell has limit ring, the inner surface rotationally connected with pinion of limit ring, the lower end fixedly connected with gear of pinion, the rack is engaged with gear connection. In the utility model, through gear rotation drive two plunger left and right movement, drive the contraction of buffer spring, and the liquid in cavity will flow to left and right cavity because of the reason of air pressure, and then realize the switch cooperation of clean door.

Description

Technical Field

[0001] This utility model relates to the field of door control hardware technology, and in particular to an adjustable door closer device for steel cleanroom doors. Background Technology

[0002] Door closers, as the core component controlling the movement trajectory of doors, play a crucial role in building safety and spatial isolation. Through mechanical or hydraulic energy storage and release mechanisms, they achieve automatic door closing, speed adjustment, and buffer positioning, and are widely used in high-requirement scenarios such as medical facilities, fire protection systems, and cleanrooms.

[0003] As a key device for controlling the movement trajectory of the door, the door closer mainly consists of an energy storage unit (coil spring / torsion spring assembly), a power transmission mechanism (swing arm linkage), and installation and adaptation components. Its working principle is that when the door is opened, the spring is compressed to store energy. In the initial stage of closing, the spring releases energy to push the piston to move. When it approaches the closing end point, the spring achieves buffer positioning. The whole process achieves smooth opening and closing movement through mechanical energy.

[0004] In existing technologies, mechanical door closers mostly rely on mechanical limits or simple threaded adjustments, which can only achieve coarse adjustments in a "gear" manner (such as fast, medium, and slow gears), and cannot make precise speed adjustments according to the actual use scenarios of cleanroom doors. At the same time, traditional structures are prone to elastic decay after long-term use, resulting in a decrease in closing force. Therefore, an adjustable door closer device for steel cleanroom doors is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides an adjustable door closer device for steel cleanroom doors, which aims to improve the problems of decreased closing force and inability to accurately adjust speed in the prior art after long-term use.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An adjustable door closer device for a steel cleanroom door includes a door frame and a door closer housing. The door closer housing has a circular hole inside. A buffer spring is fixedly connected to the left side of the door closer housing, and a plunger is fixedly installed at the other end of the buffer spring. A stroke sealing ring is fixedly installed on the outer surface of the plunger, and a rack is fixedly installed on the right outer surface of the plunger. A limit ring is contacted and connected to the upper end of the circular hole of the door closer housing. A gear shaft is rotatably connected to the inner surface of the limit ring, and a gear is fixedly connected to the lower end of the gear shaft. The rack meshes with the gear.

[0008] As a further description of the above technical solution:

[0009] A wheel axle sealing ring is rotatably connected to the outer surface of the gear shaft, and a wheel axle fixing seat is rotatably connected to the outer surface of the gear shaft;

[0010] As a further description of the above technical solution:

[0011] A retaining ring is fixedly connected to the outer surface of the gear shaft, and a bushing is rotatably connected to the outer surface of the gear shaft.

[0012] As a further description of the above technical solution:

[0013] A connecting seat is fixedly installed on the outside of the door frame. A passive connecting rod is rotatably connected to the lower end of the connecting seat. An active connecting rod is rotatably connected to the outside of the passive connecting rod. A bushing is fixedly connected to the outside of the active connecting rod.

[0014] As a further description of the above technical solution:

[0015] A hinge is fixedly connected to the outside of the door frame, the door frame is fixedly connected to the outside of the hinge, and a door closer housing is fixedly connected to the outer surface of the door frame.

[0016] As a further description of the above technical solution:

[0017] The interior of the door closer housing has several grooves, and a flow-limiting column is slidably connected inside the door closer housing.

[0018] As a further description of the above technical solution:

[0019] The upper end of the flow-limiting column is fixedly connected to a threaded rod, and a threaded rod sealing ring is rotatably connected to the outer surface of the threaded rod;

[0020] As a further description of the above technical solution:

[0021] The outer surface of the threaded rod is threadedly connected to a threaded rod fixing seat, and the upper end of the threaded rod is fixedly connected to a handle.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, the rotation of the gear drives the two plungers to move left and right, which in turn causes the buffer spring to contract. At the same time, the liquid in the cavity will flow to the left and right cavities due to air pressure, thereby realizing the opening and closing of the clean door.

[0024] 2. In this utility model, by rotating the handle, the flow-limiting column is driven to rise or fall, thereby moving the flow-limiting column away from the liquid groove opened above the cavity. When it moves away from the groove, the liquid flow rate will increase, and when it moves closer to the groove, the liquid flow rate will decrease, thereby realizing the control of the opening and closing speed of the clean door. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of the adjustable door closer device for steel cleanroom doors proposed in this utility model;

[0026] Figure 2 This is a schematic diagram of the hydraulic door closer structure of the adjustable door closer device for steel cleanroom doors proposed in this utility model.

[0027] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0028] Figure 4 for Figure 2 Enlarged view of point B in the middle.

[0029] Legend:

[0030] 1. Door frame; 2. Connecting seat; 3. Passive connecting rod; 4. Active connecting rod; 5. Door panel; 6. Hinge; 7. Door closer housing; 8. Buffer spring; 9. Plunger; 10. Stroke sealing ring; 11. Rack; 12. Gear; 13. Gear shaft; 14. Limiting ring; 15. Wheel axle sealing ring; 16. Wheel axle fixing seat; 17. Retaining ring; 18. Bushing; 19. Flow limiting column; 20. Threaded rod; 21. Screw sealing ring; 22. Screw fixing seat; 23. Handle. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Reference Figures 1 to 3This utility model provides an embodiment of an adjustable door closer device for a steel cleanroom door, comprising a door frame 1 and a door closer housing 7. The door frame 1 is the basic component for installing the door closer. The door closer housing 7 has a circular hole inside, which protects the internal structure and provides a track for the movement of components such as the plunger 9. A buffer spring 8 is fixedly connected to the left side of the door closer housing 7. When the door is opened, the buffer spring 8 is compressed to store elastic potential energy, and when the door is closed, the potential energy is released to push the plunger 9 to move. The other end of the buffer spring 8 is fixedly installed with the plunger. 9. Under the action of the buffer spring 8, the plunger 9 moves within the door closer housing 7. A stroke sealing ring 10 is fixedly installed on the outer surface of the plunger 9 to seal the gap between the plunger 9 and the door closer housing 7. A rack 11 is fixedly installed on the right outer surface of the plunger 9, which converts the linear motion of the plunger 9 into the rotational motion of the gear 12. A limit ring 14 is connected to the upper end of the circular hole of the door closer housing 7 to prevent the gear shaft 13 from axially moving during rotation. The inner surface of the limit ring 14 is rotatably connected to the gear shaft 13. The gear 12 is supported and driven to rotate. The lower end of the gear shaft 13 is fixedly connected to the gear 12. The rack 11 meshes with the gear 12. The outer surface of the gear shaft 13 is rotatably connected to the axle sealing ring 15 to prevent hydraulic oil leakage. The outer surface of the gear shaft 13 is rotatably connected to the axle fixing seat 16 to enable stable rotation. The outer surface of the gear shaft 13 is fixedly connected to the retaining ring 17 to axially position the bushing 18 on the gear shaft 13. The bushing 18 rotatably connects to the outer surface of the gear shaft 13, allowing the active connecting rod 4 to rotate flexibly around it. The door frame 1 A connecting seat 2 is fixedly installed on the outside of the door frame 1 for connecting the passive link 3. The lower end of the connecting seat 2 is rotatably connected to the passive link 3. The outside of the passive link 3 is rotatably connected to the active link 4. The passive link 3 and the active link 4 form a linkage mechanism. The outside of the active link 4 is fixedly connected to the bushing 18. The outside of the door frame 1 is fixedly connected to the hinge 6. The outside of the hinge 6 is fixedly connected to the door frame 1. The hinge 6 connects the door frame 1 and the door panel 5, so that the door panel 5 can rotate around the axis of the hinge 6. The outer surface of the door frame 1 is fixedly connected to the door closer housing 7.

[0033] Reference Figure 4The door closer housing 7 has several grooves inside. A flow-limiting column 19 is slidably connected inside the door closer housing 7. By moving within the grooves of the door closer housing 7, the flow cross-sectional area of ​​the hydraulic oil is changed. A threaded rod 20 is fixedly connected to the upper end of the flow-limiting column 19. By rotating the threaded rod 20, the flow-limiting column 19 can be moved up and down, thereby adjusting the position of the flow-limiting column 19. A screw sealing ring 21 is rotatably connected to the outer surface of the threaded rod 20 to prevent hydraulic oil leakage. A screw fixing seat 22 is threadedly connected to the outer surface of the threaded rod 20 to provide support for the threaded rod 20 and keep it stable during rotation. A handle 23 is fixedly connected to the upper end of the threaded rod 20, which allows the operator to rotate the threaded rod 20 and adjust the position of the flow-limiting column 19 by manually operating the handle 23.

[0034] Working principle: When the door frame 1 is opened, the gear 12 rotates counterclockwise, driving the active linkage 4. Due to the contraction of the buffer spring 8, the plunger 9 moves to the left. Due to the action of the stroke sealing ring 10, the liquid does not flow into the two plunger 9 cavities on its own. Instead, the liquid enters the two plunger 9 cavities from the left groove through the air pressure. When the cavity is filled with liquid, the other plunger 9 has a hole in the center. Excess liquid flows out of the right cavity through the hole. After the door frame 1 is opened, the right cavity is filled with liquid. Because the buffer spring 8 is compressed, it will automatically push the plunger 9 to the right, causing the gear 12 to rotate clockwise, driving the active linkage 4. Due to the action of the stroke sealing ring 10, the liquid does not flow into the two plunger 9 cavities on its own. Instead, it flows back into the two plunger 9 cavities through the groove at the upper end of the cavity. When the two plunger 9 cavities are filled with liquid, it flows into the left cavity through the upper groove until the door frame 1 is closed.

[0035] The door closer housing 7 has several grooves inside. A flow-limiting column 19 is fixedly connected to a threaded rod 20, and a handle 23 is fixedly connected to the threaded rod 20. When you want to increase the opening and closing speed, rotate the handle 23 clockwise to rotate the threaded rod 20. The threaded rod 20 then drives the flow-limiting column 19 to rise. At this time, the flow-limiting column 19 moves away from the groove above the left cavity, increasing the liquid flow rate and thus increasing the opening and closing speed. When you rotate the handle 23 counterclockwise, it will drive the threaded rod 20 and its flow-limiting column 19 to fall, blocking a certain liquid flow rate and thus reducing the opening and closing speed.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An adjustable door closer device for a steel cleanroom door, comprising a door frame (1) and a door closer housing (7), characterized in that: The door closer housing (7) has a circular hole inside. A buffer spring (8) is fixedly connected to the left side of the door closer housing (7). A plunger (9) is fixedly installed at the other end of the buffer spring (8). A stroke sealing ring (10) is fixedly installed on the outer surface of the plunger. A rack (11) is fixedly installed on the right outer surface of the plunger (9). A limit ring (14) is contacted and connected to the upper end of the circular hole of the door closer housing (7). A gear shaft (13) is rotatably connected to the inner surface of the limit ring (14). A gear (12) is fixedly connected to the lower end of the gear shaft (13). The rack (11) meshes with the gear (12).

2. The adjustable door closer device for steel cleanroom doors according to claim 1, characterized in that: The outer surface of the gear shaft (13) is rotatably connected to a wheel axle sealing ring (15), and the outer surface of the gear shaft (13) is rotatably connected to a wheel axle fixing seat (16).

3. The adjustable door closer device for steel cleanroom doors according to claim 1, characterized in that: A retaining ring (17) is fixedly connected to the outer surface of the gear shaft (13), and a bushing (18) is rotatably connected to the outer surface of the gear shaft (13).

4. The adjustable door closer device for steel cleanroom doors according to claim 1, characterized in that: A connecting seat (2) is fixedly installed on the outside of the door frame (1). A passive connecting rod (3) is rotatably connected to the lower end of the connecting seat (2). An active connecting rod (4) is rotatably connected to the outside of the passive connecting rod (3). A bushing (18) is fixedly connected to the outside of the active connecting rod (4).

5. The adjustable door closer device for steel cleanroom doors according to claim 1, characterized in that: The door frame (1) is fixedly connected to the outside of a hinge (6), the hinge (6) is fixedly connected to the outside of the door frame (1), and the outer surface of the door frame (1) is fixedly connected to a door closer housing (7).

6. The adjustable door closer device for steel cleanroom doors according to claim 1, characterized in that: The door closer housing (7) has several grooves inside, and a flow-limiting column (19) is slidably connected inside the door closer housing (7).

7. The adjustable door closer device for steel cleanroom doors according to claim 6, characterized in that: The upper end of the flow-limiting column (19) is fixedly connected to a threaded rod (20), and a screw sealing ring (21) is rotatably connected to the outer surface of the threaded rod (20).

8. The adjustable door closer device for steel cleanroom doors according to claim 7, characterized in that: The outer surface of the threaded rod (20) is threadedly connected to a screw fixing seat (22), and the upper end of the threaded rod (20) is fixedly connected to a handle (23).

Images