Automatic closing device for fireproof door
By designing the automatic closing device of the fire door, the automatic closing of the fire door is achieved by using the push spring and wire rope mechanism, which solves the problem that the fire door cannot be closed in time during a fire, and avoids damage caused by excessive hinge stress.
Patent Information
- Application Number
- CN202422173751.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-05
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-09-05
AI Technical Summary
Existing fire doors cannot be closed in time when the fire is severe, and traditional mechanical closing devices will affect the closing of the hinge and the opening and closing of the fire door, resulting in excessive stress on the hinge and damage.
An automatic fire door closing device is designed to push the extension rod by pushing the spring to make the door panel connected to the push block have a closing trend, and quickly and stably close through the wired wire rope and coil spring mechanism to avoid excessive stress on the hinge.
The fire door is automatically closed in time in the case of fire, avoiding damage caused by excessive force on the hinge, and adjusting the closing force of the fire door to ensure the effective use of the fire door.
Smart Images
Figure CN222976654U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of fire doors, in particular to an automatic closing device for fire doors. Background Art
[0002] A fire door refers to a door that can meet the requirements of fire resistance stability, integrity, and heat insulation within a certain period of time. It is a fire partition with a certain fire resistance set in fire compartments, evacuation stairwells, vertical shafts, etc. It is specifically used to isolate the fire source in building construction and plays a huge role in fire protection work. Once a fire occurs, people can obtain an escape opportunity through the fire door.
[0003] When a fire occurs, the fire door can effectively block the spread of the fire. However, when the fire is large, it is impossible to manually close the fire door due to high temperature, and when the fire is large, the circuit is burned out and the electronically controlled closing system will also fail. Moreover, the traditional mechanical closing device for fire doors will not only affect the closing of the hinge when closing but also affect the opening and closing degree of the fire door. Therefore, we provide an automatic closing device for fire doors to solve the above problems. Summary of the Utility Model
[0004] I. Technical Problems to be Solved
[0005] The purpose of the utility model is to make up for the deficiencies of the prior art and provide an automatic closing device for fire doors.
[0006] II. Technical Solutions
[0007] To achieve the above object, the utility model provides the following technical solutions: An automatic closing device for a fire door, comprising a fixed box, an extension rod is rotatably connected to the inner side of the fixed box, a pushing block is rotatably sleeved at the lower end of the extension rod, an extrusion plate is sleeved on the outer side of the extension rod, a guide rod is fixedly connected to the inner side of the fixed box, a pushing spring is sleeved on the outer surface of the guide rod, and the pushing spring is between the extrusion plate and the extension rod. A ratchet ring is fixedly connected to the upper surface of the fixed box, a wrapping shell is sleeved on the outer surface of the ratchet ring, and the wrapping shell is fixedly connected to the fixed box. A positioning pile is fixedly connected to the upper end of the extrusion plate, an adjusting handle is slidably sleeved on the surface of the positioning pile, the adjusting handle is slidably connected to the inner wall of the wrapping shell, a return spring is sleeved on the outer surface of the adjusting handle, and the return spring is inside the wrapping shell. A fixing plate is fixedly connected to the inner side of the fixed box, a winding shaft is rotatably connected to the surface of the fixing plate, a wire releasing steel wire rope is fixedly connected and wound on the surface of the winding shaft, the wire releasing steel wire rope passes through the inside of the guide rod, and one end of the wire releasing steel wire rope away from the winding shaft is fixedly connected to the extension rod. A winding spring is fixedly connected to the surface of the winding shaft, one end of the winding spring away from the winding shaft is fixedly connected to a rotating shell, the rotating shell is rotatably connected to the fixing plate, and a winding and unwinding shaft is engaged with the outer surface of the rotating shell.
[0008] Further, the guiding rod has an arc-shaped round rod shape. The upper end of the extension rod is sleeved outside the guiding rod. One end of the guiding rod away from the pushing spring is a hollow tube and is provided with a groove penetrating up and down. The wire releasing steel wire rope is inside the groove of the guiding rod. A sliding sleeve is arranged on the surface of the guiding rod, and the sliding sleeve is in sliding contact with the wire releasing steel wire rope.
[0009] Further, one end of the extension rod is a square rod. The square rod of the extension rod is sleeved outside the guiding rod. One end of the square rod of the extension rod is rotatably connected to the fixed box. The other end of the square rod of the extension rod is provided with a round rod. The lower end of the round rod of the extension rod is rotatably connected to the pushing block, and the pushing block is connected to the fireproof door panel.
[0010] Further, the adjusting handle is composed of a ratchet disc and a lifting sleeve. The ratchet disc has a disc shape, and the outer peripheral surface is provided with ratchet teeth and meshes with the ratchet ring. A square hole is arranged in the center of the ratchet disc and is slidably connected to the positioning pile. The upper surface of the ratchet disc is fixedly connected with the lifting sleeve. The lifting sleeve is slidably connected to the wrapping shell, and the reset spring is outside the lifting sleeve.
[0011] Further, one end of the winding shaft is a connecting rod and the other end is a round shaft. The connecting rod is rotatably connected to the fixing plate. The winding spring is fixedly connected to the outside of the connecting rod. The end face of the connecting rod is fixedly connected to the round shaft, and the wire releasing steel wire rope is wound around the outside of the round shaft.
[0012] Further, the rotating shell wraps around the outside of the winding spring. A rotating worm gear ring is arranged on the outside of the rotating shell. The rotating worm gear ring meshes with the winding and unwinding shaft. There are two groups of rotating shells and they are symmetrically distributed on the upper and lower sides of the guiding rod.
[0013] Further, the lower end of the winding and unwinding shaft is a worm and the upper end is a knob key. The tooth directions of the upper and lower ends of the worm of the winding and unwinding shaft are opposite and mesh with different rotating worm gear rings.
[0014] III) Beneficial effects:
[0015] Compared with the prior art, the automatic closing device of the fireproof door has the following beneficial effects:
[0016] First, in the present utility model, the pushing spring always pushes and extrudes the extension rod, so that the door panel connected to the pushing block always has a closing tendency. By setting the ratchet disc and the ratchet ring, the ratchet ring and the ratchet disc are cooperatively clamped at different positions, so that the extrusion plate can push the pushing spring at different positions, and the closing force of the fireproof door is changed, achieving the effect of adjusting the closing force of the fireproof door, and solving the problem that the fireproof door cannot be closed in time when the fire is severe.
[0017] Second, the utility model is provided with a coil spring, so that the winding shaft can always maintain a rotational force to wind and unwind the wire rope. When the wire rope is unwound and pulled, the fire door can be quickly and stably closed. By arranging an extension rod in the fixed box and making it rotate above the hinge shaft, the closing of the fire door can exert force around the direction of the hinge shaft, preventing the hinge of the fire door from being damaged due to excessive force, achieving the effect of avoiding damage to the hinge of the fire door when stressed, and solving the problem that the hinge of the fire door is damaged due to excessive force when the fire door is closed. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0019] Figure 2 It is a schematic diagram of the extension rod structure of the utility model;
[0020] Figure 3 It is a schematic diagram of the pressing plate structure of the utility model;
[0021] Figure 4 It is a schematic diagram of the ratchet ring structure of the utility model;
[0022] Figure 5 It is a schematic diagram of the guide rod structure of the utility model;
[0023] Figure 6 It is a schematic diagram of the rotating shell structure of the utility model.
[0024] In the figure: 1, fixed box; 2, extension rod; 3, pushing block; 4, pressing plate; 5, guide rod; 51, sliding sleeve; 6, pushing spring; 7, ratchet ring; 8, wrapping shell; 9, positioning pile; 10, adjusting handle; 101, ratchet disc; 102, lifting sleeve; 11, reset spring; 12, fixing plate; 13, winding shaft; 131, connecting rod; 132, round shaft; 14, wire rope for unwinding; 15, coil spring; 16, rotating shell; 161, worm gear ring; 17, winding and unwinding shaft. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0026] Such as Figures 1-6As shown in the figure, the present utility model provides a technical solution: an automatic closing device for a fire door, which includes a fixed box 1. Inside the fixed box 1, an extension rod 2 is rotatably connected. At the lower end of the extension rod 2, a pushing block 3 is rotatably sleeved. An extrusion plate 4 is sleeved outside the extension rod 2. Inside the fixed box 1, a guide rod 5 is fixedly connected. One end of the extension rod 2 is a square rod, and the square rod of the extension rod 2 is sleeved outside the guide rod 5. One end of the square rod of the extension rod 2 is rotatably connected to the fixed box 1. At the other end of the square rod of the extension rod 2, a round rod is provided. The lower end of the round rod of the extension rod 2 is rotatably connected to the pushing block 3. The pushing block 3 is connected to the fire door panel. The extension rod 2 can rotate inside the fixed box 1 and cooperate with the hinge shaft of the fire door to rotate, so that the force of opening and closing the fire door rotates around the hinge shaft to avoid damaging the hinge.
[0027] A pushing spring 6 is sleeved on the outer surface of the guide rod 5. The pushing spring 6 is between the extrusion plate 4 and the extension rod 2. On the upper surface of the fixed box 1, a ratchet ring 7 is fixedly connected. An outer shell 8 is sleeved on the outer surface of the ratchet ring 7. The outer shell 8 is fixedly connected to the fixed box 1. A positioning pile 9 is fixedly connected to the upper end of the extrusion plate 4. An adjusting handle 10 is slidably sleeved on the surface of the positioning pile 9. The adjusting handle 10 is slidably connected to the inner wall of the outer shell 8. A return spring 11 is sleeved on the outer surface of the adjusting handle 10. The adjusting handle 10 is composed of a ratchet disc 101 and a lifting sleeve 102. The outer shape of the ratchet disc 101 is a disc, and ratchets are provided on the outer peripheral surface and meshed with the ratchet ring 7. A square hole is provided in the center of the ratchet disc 101 and slidably connected to the positioning pile 9. A lifting sleeve 102 is fixedly connected to the upper surface of the ratchet disc 101. The lifting sleeve 102 is slidably connected to the outer shell 8. The return spring 11 is outside the lifting sleeve 102. The adjusting handle 10 can control the rotation of the ratchet disc 101 through the lifting sleeve 102 and cooperate with the ratchet ring 7 to achieve the effect of being clamped at different angles.
[0028] The return spring 11 is inside the outer shell 8. Inside the fixed box 1, a fixing plate 12 is fixedly connected. A winding shaft 13 is rotatably connected to the surface of the fixing plate 12. A wire-releasing steel wire rope 14 is fixedly connected and wound on the surface of the winding shaft 13. One end of the winding shaft 13 is a connecting rod 131 and the other end is a round shaft 132. The connecting rod 131 is rotatably connected to the fixing plate 12. A winding spring 15 is fixedly connected outside the connecting rod 131. The end face of the connecting rod 131 is fixedly connected to the round shaft 132. The wire-releasing steel wire rope 14 is wound outside the round shaft 132. The winding shaft 13 can be affected by the torsional force of the winding spring 15 to rotate and wind up the wire-releasing steel wire rope 14.
[0029] The wire-releasing steel wire rope 14 passes through the inside of the guide rod 5. The guide rod 5 is in the shape of an arc-shaped round rod. The upper end of the extension rod 2 is sleeved outside the guide rod 5. One end of the guide rod 5 away from the pushing spring 6 is a hollow tube and is provided with a groove that penetrates up and down. The wire-releasing steel wire rope 14 is inside the groove of the guide rod 5. A sliding sleeve 51 is provided on the surface of the guide rod 5. The sliding sleeve 51 is in sliding contact with the wire-releasing steel wire rope 14. The guide rod 5 can guide the rotation direction of the extension rod 2.
[0030] One end of the wire rope 14 for wire laying, which is far from the winding shaft 13, is fixedly connected to the extension rod 2. A winding spring 15 is fixedly connected to the surface of the winding shaft 13. One end of the winding spring 15, which is far from the winding shaft 13, is fixedly connected to a rotating shell 16. The rotating shell 16 is rotatably connected to the fixing plate 12. A winding and unwinding shaft 17 is meshed with the outer surface of the rotating shell 16. The rotating shell 16 wraps around the outside of the winding spring 15. A rotating worm gear ring 161 is arranged on the outside of the rotating shell 16. The rotating worm gear ring 161 is meshed with the winding and unwinding shaft 17. There are two groups of rotating shells 16, which are symmetrically distributed on the upper and lower sides of the guide rod 5. The rotating shell 16 can adjust the tightening degree of the winding spring 15 through the rotational cooperation between the rotating worm gear ring 161 on its surface and the winding and unwinding shaft 17, and prevent it from reversing by the meshing of the winding and unwinding shaft 17.
[0031] The lower end of the winding and unwinding shaft 17 is a worm, and the upper end is a knob key. The tooth directions of the worm at the upper and lower ends of the winding and unwinding shaft 17 are opposite and are meshed with different rotating worm gear rings 161. The winding and unwinding shaft 17 can rotate and use the worm at the lower end to push the rotating worm gear ring 161 to rotate.
[0032] Working principle: During use, first install and fix the fixed box 1 on the wall above the hinge shaft of the fire door, and install the pushing block 3 on the surface of the door panel of the fire door. When opening the door, the door panel pushes the pushing block 3, and the pushing block 3 drives the extension rod 2 to slide along the guide rod 5. The extension rod 2 compresses the pushing spring 6. At the same time, when the extension rod 2 rotates, the wire rope 14 for wire laying pulls the winding shaft 13 to rotate, so that the winding shaft 13 drives the winding spring 15 to rotate. After opening the door, the pushing spring 6 pushes the extension rod 2 to rotate on the surface of the guide rod 5, so that the pushing block 3 can push the door panel to close. At the same time, the winding of the winding spring 15 drives the winding shaft 13 to rotate back, so that the wire rope 14 for wire laying winds around the surface of the winding shaft 13 to achieve the effect of closing the fire door. By rotating the adjusting handle 10, the ratchet disc 101 and the ratchet ring 7 are meshed unidirectionally, so that the inside of the pressing plate 4 drives the rotation to adjust the pushing degree of the pushing spring 6 on the extension rod 2. By pulling up the adjusting handle 10 to squeeze the return spring 11 and disengage from the positioning pile 9, the pressing plate 4 can be quickly reset. By rotating the winding and unwinding shaft 17 to push the rotating shell 16 to rotate, the tightness of the cooperation between the winding spring 15 and the winding shaft 13 can be adjusted.
Claims
1. An automatic closing device for a fire door, comprising a fixing box (1), characterized in that: The inner side of the fixed box (1) is rotatably connected to an extension rod (2), the lower end of the extension rod (2) is rotatably sleeved with a push block (3), the outer side of the extension rod (2) is sleeved with an extrusion plate (4), the inner side of the fixed box (1) is fixedly connected to a guide rod (5), the outer surface of the guide rod (5) is sleeved with a pushing spring (6), the pushing spring (6) is between the extrusion plate (4) and the extension rod (2), the upper surface of the fixed box (1) is fixedly connected to a ratchet ring (7), the outer surface of the ratchet ring (7) is sleeved with a wrapping shell (8), the wrapping shell (8) is fixedly connected to the fixed box (1), the upper end of the extrusion plate (4) is fixedly connected to a positioning pile (9), the surface of the positioning pile (9) is slidably sleeved with an adjustment handle (10), the adjustment handle (10) is slidably connected to the inner wall of the wrapping shell (8), the outer surface of the adjustment handle (10) is sleeved with a reset spring (11), and the reset spring (11) is inside the wrapping shell (8); A fixing plate (12) is fixedly connected to the inner side of the fixing box (1), a winding shaft (13) is rotatably connected to the surface of the fixing plate (12), a wire-releasing steel wire rope (14) is fixedly connected to and wound around the surface of the winding shaft (13), the wire-releasing steel wire rope (14) passes through the inner side of the guide rod (5), one end of the wire-releasing steel wire rope (14) away from the winding shaft (13) is fixedly connected to the extension rod (2), a coil spring (15) is fixedly connected to the surface of the winding shaft (13), one end of the coil spring (15) away from the winding shaft (13) is fixedly connected to a rotating shell (16), the rotating shell (16) is rotatably connected to the fixing plate (12), and a retracting shaft (17) is meshed on the outer surface of the rotating shell (16).
2. The automatic closing device for a fire door according to claim 1, characterized in that: The guide rod (5) is in the shape of an arc-shaped round rod. The upper end of the extension rod (2) is sleeved on the outer side of the guide rod (5). The end of the guide rod (5) away from the pushing spring (6) is a hollow tube and is provided with a groove running through from top to bottom. The wire-releasing wire rope (14) is inside the groove of the guide rod (5). A sliding sleeve (51) is provided on the surface of the guide rod (5), and the sliding sleeve (51) is in sliding contact with the wire-releasing wire rope (14).
3. The automatic closing device for fire doors according to claim 1, characterized in that: One end of the extension rod (2) is a square rod, the square rod of the extension rod (2) is sleeved on the outside of the guide rod (5), one end of the square rod of the extension rod (2) is rotatably connected to the fixing box (1), the other end of the square rod of the extension rod (2) is provided with a round rod, the lower end of the round rod of the extension rod (2) is rotatably connected to the push block (3), and the push block (3) is connected to the fireproof door panel.
4. The automatic closing device for a fire door according to claim 1, characterized in that: The adjusting handle (10) is composed of a ratchet disk (101) and a lifting sleeve (102). The ratchet disk (101) is in the shape of a circular disk with ratchets arranged on its outer circumference and meshing with a ratchet ring (7). A square hole is arranged at the center of the ratchet disk (101) and is slidably connected to a positioning pile (9). The upper surface of the ratchet disk (101) is fixedly connected with the lifting sleeve (102), and the lifting sleeve (102) is slidably connected to the wrapping shell (8). A reset spring (11) is located outside the lifting sleeve (102).
5. The automatic closing device for fire doors according to claim 1, characterized in that: One end of the winding shaft (13) is a connecting rod (131) and the other end is a round shaft (132); the connecting rod (131) is rotatably connected to the fixing plate (12); the coil spring (15) is fixedly connected to the outside of the connecting rod (131); the end surface of the connecting rod (131) is fixedly connected to the round shaft (132); and the pay-off wire rope (14) is wound around the outside of the round shaft (132).
6. The automatic closing device for a fire door according to claim 1, characterized in that: The rotating shell (16) is wrapped around the outside of the coil spring (15), and a rotating worm wheel ring (161) is arranged on the outside of the rotating shell (16). The rotating worm wheel ring (161) is meshed with the retractable shaft (17). There are two groups of rotating shells (16) and they are symmetrically distributed on the upper and lower sides of the guide rod (5).
7. An automatic closing device for a fire door according to claim 1 or 6, characterized in that: The lower end of the retractable shaft (17) is a worm and the upper end is a knob. The teeth of the worm at the upper and lower ends of the retractable shaft (17) are in opposite directions and mesh with different rotating worm wheel rings (161).