Fireproof door with tension-adjustable door closer

Abstract

The utility model relates to the technical field of door closing devices, and discloses a door closer tension-adjustable fireproof door which comprises a door frame, a fireproof door body is arranged on the inner wall of the door frame, a handle is fixedly connected to the outer wall of the fireproof door body, a base is fixedly connected to the top of the door frame, and a rotating rod is rotationally connected to the inner wall of the base. The outer wall of the rotating rod is rotationally connected with an adjusting rod. When the return speed of the door closer needs to be adjusted, a screwdriver can be used for rotating the adjusting block, the adjusting block rotates the first gear, the first gear is connected with the second gear in a meshed mode, the second gear rotates the threaded rod, forward and reverse rotation of the threaded rod pushes the sliding block to move front and back, and when the sliding block moves forwards, the sliding block pushes the fixing rod. The fixing rod pushes the oil pushing block to move forwards, the oil pushing block extrudes hydraulic oil in the adjusting rod, the space of the hydraulic oil is limited, the circulation time of the hydraulic oil through the first oil conveying groove and the second oil conveying groove is prolonged, and therefore the return speed of the door closer is adjusted.

Description

Technical Field

[0001] The utility model relates to the technical field of door closing devices, in particular to a fire door with adjustable closing force of a door closer. Background Art

[0002] In many scenarios of daily life, some doors and windows need to be kept in a closed state, such as the doors of places that need to isolate external interference like library reading rooms and fire doors, or the cabinet doors of freezers in supermarkets for storing frozen foods. To achieve the automatic return and closing of these doors and windows, a hydraulic damping return device installed between a rotating body (referring to the door or window) and a fixed frame (corresponding to the door frame or window frame of the door or window) was commonly used in the past. This device can achieve the slow return of the rotating body with remarkable effects.

[0003] The purpose of the utility model is to adjust the hydraulic oil inside the door closer, so as to adjust the return speed of the fire door. Content of the Utility Model

[0004] To solve the above technical problems, the utility model provides a fire door with adjustable closing force of a door closer.

[0005] The utility model is realized by the following technical solutions: A fire door with adjustable closing force of a door closer includes a door frame. A fire door is arranged on the inner wall of the door frame. A handle is fixedly connected to the outer wall of the fire door. A base is fixedly connected to the top of the door frame. A rotating rod is rotatably connected to the inner wall of the base. An adjusting rod is rotatably connected to the outer wall of the rotating rod. An adjusting block is rotatably connected to the inner wall of the adjusting rod. A first gear is fixedly connected to the end of the adjusting block close to the door frame. A second gear is meshed with the outer wall of the first gear. A threaded rod is fixedly connected to the inner wall of the second gear. A slider is threadedly connected to the outer wall of the threaded rod. An oil pushing block is fixedly connected to the end of the threaded rod away from the second gear. A fixed rod is fixedly connected to the left side of the slider. The end of the fixed rod away from the slider is fixedly connected to the right side of the oil pushing block. A telescopic limiting rod is fixedly connected to the right side of the oil pushing block. The end of the telescopic limiting rod away from the oil pushing block is fixedly connected to the inner wall of the adjusting rod. A sliding rod is slidably connected to the inner wall of the adjusting rod. An oil delivery groove one is opened at the bottom of the inner wall of the adjusting rod. An oil delivery groove two is opened at the top of the inner wall of the adjusting rod. A spring base is fixedly connected to the outer wall of the sliding rod. A spring is fixedly connected to the left side of the spring base. The end of the spring away from the spring base is fixedly connected to the inner wall of the adjusting rod. A sealing ring is fixedly connected to the inner wall of the adjusting rod.

[0006] As a further improvement of the above solution, there are two fire doors, and the two fire doors are symmetrically arranged with the center of the door frame as the center. There are several handles, and the several handles are symmetrically arranged with the center of the door frame as the center.

[0007] As a further improvement of the above solution, there are two bases, and the two bases are symmetrically arranged with respect to the center of the door frame. There are two adjusting rods, and the two adjusting rods are symmetrically arranged with respect to the center of the door frame. There are two sliding rods, and the two sliding rods are symmetrically arranged with respect to the center of the door frame.

[0008] Through the above technical solution, when it is necessary to adjust the return speed of the door closer, a screwdriver can be used to rotate the adjusting block. The adjusting block rotates gear one, and gear one is meshed with gear two. Gear two rotates the threaded rod, and the forward and reverse rotation of the threaded rod realizes the forward and backward movement of the push block. When the push block moves forward, the push block pushes the fixed rod, and the fixed rod pushes the oil pushing block forward. The oil pushing block squeezes the hydraulic oil inside the adjusting rod, restricts the space of the hydraulic oil, and makes the circulation time of the hydraulic oil through the oil delivery groove one and the oil delivery groove two longer, so as to realize the adjustment of the return speed of the door closer.

[0009] As a further improvement of the above solution, the bottom of the sliding rod is rotatably connected with a second rotating rod, the bottom of the second rotating rod is rotatably connected with a telescopic adjusting rod, the outer wall of the telescopic adjusting rod is slidably connected with a telescopic adjusting rod housing, the inner wall of the telescopic adjusting rod housing is rotatably connected with a third rotating rod, the top of the telescopic adjusting rod housing is in contact with a gasket, and the top of the gasket is fixedly connected with a second limiting block.

[0010] As a further improvement of the above solution, the outer wall of the third rotating rod is slidably connected with an adjusting slider housing, the inner wall of the adjusting slider housing is provided with a chute, and the inner wall of the chute is slidably connected with a second slider. The top of the second slider is fixedly connected to the bottom of the third rotating rod.

[0011] As a further improvement of the above solution, there are two third rotating rods, and the two third rotating rods are symmetrically arranged with respect to the center of the door frame. There are two second sliders, and the two second sliders are symmetrically arranged with respect to the center of the door frame. There are two adjusting slider housings, and the two adjusting slider housings are symmetrically arranged with respect to the center of the door frame.

[0012] Through the above technical solution, when the fire door is opened outwards, the sliding rod moves outwards. Pulling the sliding rod outwards drives the spring base, and the spring base squeezes the spring outwards. At the same time, the hydraulic oil on the left side of the sliding rod moves to the right through the oil delivery groove one and the oil delivery groove two. While the sliding rod moves outwards, rotate the second rotating rod. The second rotating rod pulls the telescopic adjusting rod outwards. While the telescopic adjusting rod moves outwards, the friction force drives the telescopic adjusting rod housing. The telescopic adjusting rod housing rotates through the third rotating rod. At the same time, the telescopic adjusting rod housing pulls the third rotating rod, and the third rotating rod pulls the second slider. The second slider moves in the chute on the inner wall of the adjusting slider housing, reducing the resistance when opening the door and making the two sliding rods move more smoothly at the same time when opening the door.

[0013] As a further improvement of the above solution, a frame fixing block is fixedly connected to the outer wall of the door frame, a fire door fixing block is fixedly connected to the outer wall of the fire door, a limiting rod is rotatably connected to the inner walls of the fire door fixing block and the frame fixing block, and a second gasket is arranged in contact with the outer wall of the limiting rod.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] When it is necessary to adjust the return speed of the door closer in the present utility model, a screwdriver can be used to rotate the adjusting block. The adjusting block rotates the first gear, the first gear meshes with the second gear, the second gear rotates the threaded rod, and the forward and reverse rotation of the threaded rod realizes the forward and backward movement of the pushing slider. When the slider moves forward, the slider pushes the fixing rod, the fixing rod pushes the oil pushing block forward, and the oil pushing block squeezes the hydraulic oil inside the adjusting rod, restricting the space of the hydraulic oil, so that the flow time of the hydraulic oil through the first oil delivery groove and the second oil delivery groove becomes longer, thereby realizing the adjustment of the return speed of the door closer.

[0016] When the fire door is opened outwards in the present utility model, the sliding rod moves outwards, pulling the sliding rod outwards drives the spring base, the spring base squeezes the spring outwards, and at the same time, the hydraulic oil on the left side of the sliding rod moves to the right through the first oil delivery groove and the second oil delivery groove. While the sliding rod moves outwards, the second rotating rod is rotated, the second rotating rod pulls the telescopic adjusting rod outwards. While the telescopic adjusting rod moves outwards, the frictional force drives the outer shell of the telescopic adjusting rod, and the outer shell of the telescopic adjusting rod rotates through the third rotating rod. At the same time, the outer shell of the telescopic adjusting rod pulls the third rotating rod, the third rotating rod pulls the second slider, and the second slider moves in the chute on the inner wall of the adjusting slider shell, reducing the resistance during door opening and making the two sliding rods move more smoothly simultaneously when opening the door. Description of the Drawings

[0017] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0018] Figure 2 is a schematic diagram of the structure of the adjusting block of the present utility model;

[0019] Figure 3 is a schematic cross-sectional view of the adjusting block of the present utility model;

[0020] Figure 4 is the present utility model Figure 3 is an enlarged schematic view of part A in the present utility model;

[0021] Figure 5 is a schematic diagram of the structure of the sliding rod of the present utility model;

[0022] Figure 6 is the present utility model Figure 5 is an enlarged schematic view of part B in the present utility model;

[0023] Figure 7 Schematic diagram of the telescopic adjusting rod structure of the present utility model;

[0024] Figure 8 Schematic diagram of the cross-sectional structure of the outer shell of the telescopic adjusting rod of the present utility model;

[0025] Figure 9 For the present utility model Figure 8 Schematic diagram of the enlarged structure of part C in the present utility model;

[0026] Figure 10 For the present utility model Figure 1 Schematic diagram of the enlarged structure of part D in the present utility model.

[0027] Main symbol description:

[0028] 1. Door frame; 2. Fire door; 3. Handle; 4. Base; 5. Rotating rod; 6. Adjusting rod; 7. Adjusting block; 8. Gear 1; 9. Gear 2; 10. Threaded rod; 11. Slide block; 12. Oil pushing block; 13. Telescopic limit rod; 14. Slide rod; 15. Oil delivery groove 1; 16. Oil delivery groove 2; 17. Spring base; 18. Spring; 19. Sealing ring; 20. Rotating rod 2; 21. Telescopic adjusting rod; 22. Outer shell of telescopic adjusting rod; 23. Rotating rod 3; 24. Gasket; 25. Limit block 2; 26. Slide block 2; 27. Chute; 28. Outer shell of adjusting slide block; 29. Fixed block of fire door; 30. Fixed block of frame; 31. Limit rod; 32. Gasket 2; 33. Fixed rod. Specific implementation manner

[0029] Next, in combination with the accompanying drawings and specific implementation manners, the present utility model will be further described. It should be noted that, on the premise of no conflict, the following-described embodiments or technical features can be arbitrarily combined with each other to form new embodiments.

[0030] Please combine with Figures 1 - 10, a fire door with adjustable closing force in this embodiment, includes a door frame 1. A fire door 2 is arranged on the inner wall of the door frame 1. A handle 3 is fixedly connected to the outer wall of the fire door 2. A base 4 is fixedly connected to the top of the door frame 1. A rotating rod 5 is rotatably connected to the inner wall of the base 4. An adjusting rod 6 is rotatably connected to the outer wall of the rotating rod 5. An adjusting block 7 is rotatably connected to the inner wall of the adjusting rod 6. One end of the adjusting block 7 close to the door frame 1 is fixedly connected with a first gear 8. A second gear 9 is meshed with the outer wall of the first gear 8. A threaded rod 10 is fixedly connected to the inner wall of the second gear 9. A slider 11 is threadedly connected to the outer wall of the threaded rod 10. One end of the threaded rod 10 away from the second gear 9 is fixedly connected with an oil pushing block 12. A fixing rod 33 is fixedly connected to the left side of the slider 11. One end of the fixing rod 33 away from the slider 11 is fixedly connected to the right side of the oil pushing block 12. A telescopic limiting rod 13 is fixedly connected to the right side of the oil pushing block 12. One end of the telescopic limiting rod 13 away from the oil pushing block 12 is fixedly connected to the inner wall of the adjusting rod 6. A sliding rod 14 is slidably connected to the inner wall of the adjusting rod 6. An oil delivery groove one 15 is arranged at the bottom of the inner wall of the adjusting rod 6. An oil delivery groove two 16 is arranged at the top of the inner wall of the adjusting rod 6. A spring base 17 is fixedly connected to the outer wall of the sliding rod 14. A spring 18 is fixedly connected to the left side of the spring base 17. One end of the spring 18 away from the spring base 17 is fixedly connected to the inner wall of the adjusting rod 6. A sealing ring 19 is fixedly connected to the inner wall of the adjusting rod 6.

[0031] There are two fire doors 2, and the two fire doors 2 are symmetrically arranged with the center of the door frame 1 as the center. There are several handles 3, and the several handles 3 are symmetrically arranged with the center of the door frame 1 as the center.

[0032] There are two bases 4, and the two bases 4 are symmetrically arranged with the center of the door frame 1 as the center. There are two adjusting rods 6, and the two adjusting rods 6 are symmetrically arranged with the center of the door frame 1 as the center. There are two sliding rods 14, and the two sliding rods 14 are symmetrically arranged with the center of the door frame 1 as the center.

[0033] The bottom of the sliding rod 14 is rotatably connected with a second rotating rod 20. The bottom of the second rotating rod 20 is rotatably connected with a telescopic adjusting rod 21. The outer wall of the telescopic adjusting rod 21 is slidably connected with a telescopic adjusting rod housing 22. A third rotating rod 23 is rotatably connected to the inner wall of the telescopic adjusting rod housing 22. A gasket 24 is in contact with the top of the telescopic adjusting rod housing 22. A second limiting block 25 is fixedly connected to the top of the gasket 24.

[0034] The outer wall of the third rotating rod 23 is slidably connected with an adjusting slider housing 28. A chute 27 is arranged on the inner wall of the adjusting slider housing 28. A second slider 26 is slidably connected to the inner wall of the chute 27. The top of the second slider 26 is fixedly connected to the bottom of the third rotating rod 23.

[0035] There are two rotating rods three 23, which are symmetrically arranged with respect to the center of the door frame 1. There are two sliders two 26, which are symmetrically arranged with respect to the center of the door frame 1. There are two adjusting slider housings 28, which are symmetrically arranged with respect to the center of the door frame 1.

[0036] A frame fixing block 30 is fixedly connected to the outer wall of the door frame 1, and a fire door fixing block 29 is fixedly connected to the outer wall of the fire door 2. A limiting rod 31 is rotatably connected between the inner walls of the fire door fixing block 29 and the frame fixing block 30, and a gasket two 32 is arranged in contact with the outer wall of the limiting rod 31.

[0037] The implementation principle of a fire door with adjustable closing force of the present application embodiment is as follows: When it is necessary to adjust the return speed of the closing device, a screwdriver can be used to rotate the adjusting block 7. The adjusting block 7 rotates the gear one 8, and the gear one 8 meshes with the gear two 9. The gear two 9 rotates the threaded rod 10, and the forward and reverse rotation of the threaded rod 10 realizes the forward and backward movement of the push block 11. When the push block 11 moves forward, the push block 11 pushes the fixed rod 33, and the fixed rod 33 pushes the oil pushing block 12 forward. The oil pushing block 12 squeezes the hydraulic oil inside the adjusting rod 6, restricts the space of the hydraulic oil, and makes the flow time of the hydraulic oil through the oil delivery groove one 15 and the oil delivery groove two 16 longer, so as to realize the adjustment of the return speed of the closing device. When the fire door 2 is opened outward, the sliding rod 14 moves outward, pulling the spring base 17 by pulling the sliding rod 14 outward. The spring base 17 squeezes the spring outward. At the same time, the hydraulic oil on the left side of the sliding rod 14 moves to the right through the oil delivery groove one 15 and the oil delivery groove two 16. While the sliding rod 14 moves outward, the rotating rod two 20 is rotated, and the rotating rod two 20 pulls the telescopic adjusting rod 21 outward. While the telescopic adjusting rod 21 moves outward, the frictional force drives the telescopic adjusting rod housing 22. The telescopic adjusting rod housing 22 rotates through the rotating rod three 23. At the same time, the telescopic adjusting rod housing 22 pulls the rotating rod three 23, and the rotating rod three 23 pulls the slider two 26. The slider two 26 moves in the chute 27 on the inner wall of the adjusting slider housing 28, reducing the resistance during opening, making the simultaneous movement of the two sliding rods smoother when opening the door. When the door is closed, the reaction force of the spring 18 pushes the spring base 17, and the spring base 17 pushes the sliding rod 14. The sliding rod 14 moves to the right to squeeze the hydraulic oil on the right side. The squeezed hydraulic oil moves to the left through the oil delivery groove one 15 and the oil delivery groove two 16, so as to realize the slow retraction of the sliding rod 14. At the same time, the sliding rod 14 drives the rotating rod two 20 and the telescopic adjusting rod 21 to retract. The frictional force on the outer wall of the telescopic adjusting rod 21 drives the telescopic adjusting rod housing 22. The telescopic adjusting rod housing 22 drives the rotating rod three 23, and the rotating rod three 23 drives the slider two 26, so that the slider two 26 moves inside the chute 27, realizing the slow closing of the fire door 2, making the whole process slow, ensuring that the door can be closed smoothly without being too easy or too heavy to close, and increasing the service life of the fire door 2.

[0038] The above embodiments are only the preferred embodiments of the present utility model, and the scope of protection of the present utility model cannot be limited thereby. Any non-substantive changes and substitutions made by those skilled in the art based on the present utility model fall within the scope of protection required by the present utility model.

Claims

1. A fire door with adjustable closing force of the closer, characterized in that, It includes a door frame (1), a fire door (2) is arranged on the inner wall of the door frame (1), a handle (3) is fixedly connected to the outer wall of the fire door (2), a base (4) is fixedly connected to the top of the door frame (1), a rotating rod (5) is rotatably connected to the inner wall of the base (4), an adjusting rod (6) is rotatably connected to the outer wall of the rotating rod (5), an adjusting block (7) is rotatably connected to the inner wall of the adjusting rod (6), a first gear (8) is fixedly connected to the end of the adjusting block (7) close to the door frame (1), a second gear (9) is meshed with the outer wall of the first gear (8), a threaded rod (10) is fixedly connected to the inner wall of the second gear (9), a slider (11) is threadedly connected to the outer wall of the threaded rod (10), an oil pushing block (12) is fixedly connected to the end of the threaded rod (10) far from the second gear (9), a fixed rod (33) is fixedly connected to the left side of the slider (11), the end of the fixed rod (33) far from the slider (11) is fixedly connected to the right side of the oil pushing block (12), a telescopic limiting rod (13) is fixedly connected to the right side of the oil pushing block (12), the end of the telescopic limiting rod (13) far from the oil pushing block (12) is fixedly connected to the inner wall of the adjusting rod (6), a sliding rod (14) is slidably connected to the inner wall of the adjusting rod (6), an oil supply groove one (15) is arranged at the bottom of the inner wall of the adjusting rod (6), an oil supply groove two (16) is arranged at the top of the inner wall of the adjusting rod (6), a spring base (17) is fixedly connected to the outer wall of the sliding rod (14), a spring (18) is fixedly connected to the left side of the spring base (17), the end of the spring (18) far from the spring base (17) is fixedly connected to the inner wall of the adjusting rod (6), and a sealing ring (19) is fixedly connected to the inner wall of the adjusting rod (6).

2. The fire door with adjustable closing force according to claim 1, characterized in that, There are two fire doors (2), and the two fire doors (2) are symmetrically arranged with the center of the door frame (1) as the center. There are several handles (3), and the several handles (3) are symmetrically arranged with the center of the door frame (1) as the center.

3. A fire door with adjustable closing force according to claim 1, characterized in that, There are two bases (4), and the two bases (4) are symmetrically arranged with the center of the door frame (1) as the center. There are two adjusting rods (6), and the two adjusting rods (6) are symmetrically arranged with the center of the door frame (1) as the center. There are two sliding rods (14), and the two sliding rods (14) are symmetrically arranged with the center of the door frame (1) as the center.

4. A fire door with adjustable closing force according to claim 1, characterized in that: A second rotating rod (20) is rotatably connected to the bottom of the sliding rod (14), a telescopic adjusting rod (21) is rotatably connected to the bottom of the second rotating rod (20), a telescopic adjusting rod housing (22) is slidably connected to the outer wall of the telescopic adjusting rod (21), a third rotating rod (23) is rotatably connected to the inner wall of the telescopic adjusting rod housing (22), a gasket (24) is in contact with the top of the telescopic adjusting rod housing (22), and a second limiting block (25) is fixedly connected to the top of the gasket (24).

5. A fire door with adjustable closing force according to claim 4, characterized in that, The outer wall of the third rotating rod (23) is slidably connected with an adjusting slider housing (28). A chute (27) is provided on the inner wall of the adjusting slider housing (28). A second slider (26) is slidably connected to the inner wall of the chute (27). The top of the second slider (26) is fixedly connected to the bottom of the third rotating rod (23).

6. The fire door with adjustable closing force according to claim 5, characterized in that, There are two third rotating rods (23), and the two third rotating rods (23) are symmetrically arranged about the center of the door frame (1). There are two second sliders (26), and the two second sliders (26) are symmetrically arranged about the center of the door frame (1). There are two adjusting slider housings (28), and the two adjusting slider housings (28) are symmetrically arranged about the center of the door frame (1).

7. A fire door with adjustable closing force according to claim 1, characterized in that, A frame fixing block (30) is fixedly connected to the outer wall of the door frame (1). A fire door fixing block (29) is fixedly connected to the outer wall of the fire door (2). A limiting rod (31) is rotatably connected to the inner walls of the fire door fixing block (29) and the frame fixing block (30). A second gasket (32) is arranged in contact with the outer wall of the limiting rod (31).

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