Door closer for revolving door

Abstract

The utility model discloses a door closer for a revolving door, which comprises a door frame and a revolving door body, and is characterized in that the front side wall of the door frame is provided with an installation groove, an installation box is installed in the installation groove, and the interior of the installation box is divided into a first sealing cavity and a second sealing cavity through a sliding assembly, and the first sealing cavity and the second sealing cavity are used for being filled with hydraulic oil. The rotating door is reasonable in structural design, when the rotating door is closed, hydraulic oil flows to play a buffering role, the closing speed of the rotating door body is reduced, the clamping plate is matched with the fixing plate, the rotating rod and the rotating door body can be further buffered, the rotating speed of the rotating door body is reduced, and the fixing plate moves into the clamping groove in the clamping plate. The rotating rod and the rotating door body can be stably fixed, so that the rotating door body is in a closed state, the phenomenon of repeated opening and closing caused by poor stability of the rotating door body is avoided, and the safety in the using process is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of door closers, in particular to a door closer for revolving doors. 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 compressed and then released to automatically close the door, acting like a swing door, ensuring that after the door is opened, it can be accurately and timely closed to the initial position.

[0003] For example, in the application document with the publication number: CN217681209U and the application name: A Door Closer for a Two-Wing Automatic Revolving Door, it includes a door frame. There are two cavities in the door frame. The opposite inner walls of the door frame are rotatably connected with a rotating shaft. The outer wall of the rotating shaft is fixedly connected with a revolving door. Both ends of the rotating shaft extend into the cavities. A rotating mechanism is connected to the outer wall of the rotating shaft... In this application document, the first spring is used to push the annular block downward to contact and buffer the upper end of the revolving door to reduce the closing speed of the revolving door. However, the long-term contact between the annular block and the upper end of the revolving door easily causes wear on the upper end of the revolving door, affecting the use of the revolving door and also the buffering effect. Moreover, the spring is unstable. After the second spring pushes the revolving door to reset and close, the revolving door may repeatedly open and close due to the repeated rebound of the spring, which is not conducive to the safe passage of pedestrians. Therefore, we designed a door closer for revolving doors to solve the above problems. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the problems in the prior art that by making the annular block contact and buffer the upper end of the revolving door to reduce the closing speed of the revolving door, it is easy to cause wear on the upper end of the revolving door, and the revolving door may repeatedly open and close due to the repeated rebound of the spring. A door closer for revolving doors is proposed. When the revolving door is closed, the flow of hydraulic oil can play a buffering role, reducing the closing speed of the revolving door body. Moreover, the cooperation of the clamping plate and the fixing plate can further buffer the rotating rod and the revolving door body, reducing the rotation speed of the revolving door body. When the fixing plate moves into the card slot on the clamping plate, it can stably fix the rotating rod and the revolving door body, making the revolving door body in a closed state, avoiding the repeated opening and closing phenomenon caused by the poor stability of the revolving door body, and ensuring the safety during use.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A door closer for a revolving door, comprising a door frame and a revolving door body, characterized in that an installation groove is formed in the front side wall of the door frame, an installation box is installed in the installation groove, and the interior of the installation box is divided into a first sealing cavity for filling hydraulic oil and a second sealing cavity by a sliding assembly. The first sealing cavity and the second sealing cavity are communicated by a communicating pipe. A plurality of return springs are connected between the sliding assembly and the inner side wall of the first sealing cavity. A groove is formed in the bottom of the door frame, and a rotating rod is rotatably connected through the groove. Two ends of the rotating rod are respectively fixedly connected with the sliding assembly and the revolving door body. A clamping plate is fixedly connected to the side wall of the rotating rod, and a fixing assembly extending into the clamping plate is arranged on the inner side wall of the groove.

[0007] Preferably, the sliding assembly includes a first piston plate and a second piston plate that are hermetically and slidably connected in the installation box. An annular rack plate is fixedly connected between the opposite side walls of the first piston plate and the second piston plate. A gear meshing with the annular rack plate is rotatably connected to the inner top of the installation box. The return spring is connected between the first piston plate and the inner side wall of the first sealing cavity.

[0008] Preferably, the rotating rod is connected to the bottom of the gear and the upper end of the revolving door body by screws.

[0009] Preferably, a card slot is formed at the end of the clamping plate, and the end of the clamping plate is arc-shaped.

[0010] Preferably, the fixing assembly includes a fixing sliding groove formed on the inner side wall of the groove. A fixing plate is slidably connected in the fixing sliding groove. The end of the fixing plate is tapered and extends into the card slot on the side wall of the clamping plate. A plurality of thrust springs are connected between the fixing plate and the inner side wall of the fixing sliding groove.

[0011] Preferably, the front side plate of the door frame is connected with a plugging plate opposite to the installation groove by a plurality of screws.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] 1. For this door closer for a revolving door, when the closing door rotates to open and close, the rotating rod and the gear rotate, which can drive the annular rack plate to drive the first piston plate and the second piston plate to move, enabling the hydraulic oil to flow in the first sealing cavity and the second sealing cavity. The process of the hydraulic oil flowing can play a buffering role, reducing the closing speed of the revolving door body and enabling pedestrians to pass safely.

[0014] 2. For the door closer used for the revolving door, when the clamping plate contacts the fixed plate, the fixed plate can further buffer the rotating rod and the revolving door body, reduce the rotating speed of the revolving door body, and the clamping plate can push the fixed plate to slide into the fixed chute first, consuming the energy of the return spring. When the fixed plate is opposite to the card slot, the thrust spring pushes the fixed plate into the card slot on the clamping plate, which can stably fix the rotating rod and the revolving door body, keep the revolving door body in a closed state, avoid the phenomenon of repeated opening and closing due to poor stability, and ensure safety. Description of the Drawings

[0015] Figure 1 It is a schematic structural diagram of a door closer for a revolving door proposed by the present utility model;

[0016] Figure 2 It is a schematic front sectional view structure diagram of a door closer for a revolving door proposed by the present utility model;

[0017] Figure 3 It is Figure 2 The enlarged view of the structure at A in

[0018] Figure 4 It is a schematic front view structure diagram of a door closer for a revolving door proposed by the present utility model;

[0019] Figure 5 It is Figure 4 The sectional view structure diagram at A - A in

[0020] Figure 6 It is Figure 5 The enlarged view of the structure at B in

[0021] In the figure: 1, door frame; 2, revolving door body; 3, installation box; 4, first piston plate; 5, second piston plate; 6, first sealing cavity; 7, second sealing cavity; 8, annular rack plate; 9, gear; 10, rotating rod; 11, return spring; 12, groove; 13, clamping plate; 14, fixed chute; 15, fixed plate; 16, thrust spring; 17, plugging plate; 18, connecting pipe. Detailed Description of the Preferred Embodiments

[0022] 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 the embodiments.

[0023] Refer to Figures 1-6, A door closer for a revolving door, comprising a door frame 1 and a revolving door body 2. The bottom of the revolving door body 2 is rotatably connected to the ground. An installation groove is formed in the front side wall of the door frame 1. A sealing plate 17 opposite to the installation groove is connected to the front side plate of the door frame 1 by a plurality of screws. The sealing plate 17 can block the installation groove, and the connection by screws facilitates the disassembly and installation of the sealing plate 17. An installation box 3 is installed in the installation groove. The interior of the installation box 3 is divided into a first sealing cavity 6 for filling hydraulic oil and a second sealing cavity 7 by a sliding assembly. The first sealing cavity 6 and the second sealing cavity 7 are communicated by a communicating pipe 18, enabling the hydraulic oil in the first sealing cavity 6 and the second sealing cavity 7 to flow. A flow regulating valve can be installed in the communicating pipe according to actual usage requirements to adjust the flow rate of the hydraulic oil, thereby being able to adjust the closing speed of the revolving door body 2. A plurality of return springs 11 are connected between the sliding assembly and the inner side wall of the first sealing cavity 6. The sliding assembly includes a first piston plate 4 and a second piston plate 5 that are hermetically and slidably connected in the installation box 3. A circular rack plate 8 is fixedly connected between the opposite side walls of the first piston plate 4 and the second piston plate 5. A gear 9 that meshes with the circular rack plate 8 is rotatably connected to the inner top of the installation box 3. When the gear 9 rotates, it can horizontally move the circular rack plate 8 under the meshing action between it and the circular rack plate 8. The return spring 11 is connected between the first piston plate 4 and the inner side wall of the first sealing cavity 6. In the natural state, the return spring 11 can push the first piston plate 4 to slide towards the gear 9;

[0024] A groove 12 is formed in the bottom of the door frame 1. A rotating rod 10 is rotatably connected through the groove 12. The two ends of the rotating rod 10 are respectively fixedly connected to the sliding assembly and the revolving door body 2. The rotating rod 10 is rotatably connected through the groove 12, and the upper end of the rotating rod 10 extends into the installation box 3, and the lower end extends below the door frame 1. The rotating rod 10 is connected to the bottom of the gear 9 and the upper end of the revolving door body 2 by screws, facilitating disassembly and installation;

[0025] A clamping plate 13 is fixedly connected to the side wall of the rotating rod 10. A fixing component extending into the clamping plate 13 is provided on the inner side wall of the groove 12. A clamping groove is formed at the end of the clamping plate 13, and the end of the clamping plate 13 is arc-shaped. The fixing component includes a fixing sliding groove 14 formed on the inner side wall of the groove 12. A fixing plate 15 is slidably connected in the fixing sliding groove 14. The end of the fixing plate 15 is tapered and extends into the clamping groove on the side wall of the clamping plate 13. Rubber pads are provided on the outer side wall of the fixing plate 15, the inner side wall of the clamping groove, and the outer side wall of the clamping plate 13, which can play a buffering role when the clamping plate 13 contacts the fixing plate 15 and can increase the friction between the clamping plate 13 and the fixing plate 15. A plurality of thrust springs 16 are connected between the fixing plate 15 and the inner side wall of the fixing sliding groove 14. In the natural state, the thrust springs 16 can push the fixing plate 15 out of the fixing sliding groove 14. Anti-slip lines are provided on the inner side wall of the fixing sliding groove 14, which can increase the friction between the fixing plate 15 and the fixing sliding groove 14 and consume the energy of the thrust springs 16 to prevent the thrust springs 16 from rebounding repeatedly.

[0026] The functional principle of the present utility model can be described through the following operation method:

[0027] In the present utility model, when the rotary door closer for the rotary door is in use, the upper center of the rotary door body 2 is connected to the rotating rod 10. When a pedestrian pushes the rotary door body 2 to rotate and open, the rotary door body 2 can drive the rotating rod 10 and the gear 9 to rotate. Since the end of the fixing plate 15 is tapered, when the clamping plate 13 rotates following the rotating rod 10, the fixing plate 15 can be gradually pushed into the fixing sliding groove 14, so that the fixing plate 15 moves out of the clamping groove. Under the meshing action of the gear 9 and the annular rack plate 8, the annular rack plate 8 can move towards the first sealing cavity 6, and the first piston plate 4 can squeeze the return spring 11 to compress and make the hydraulic oil in the first sealing cavity 6 enter the second sealing cavity 7 through the connecting pipe 18;

[0028] After the personnel enter, the reset spring 11 can push the first piston plate 4 to drive the annular rack plate 8 to move back to the second sealing cavity 7. Under the meshing action of the annular rack plate 8 and the gear 9, the gear 9 can drive the rotating rod 10 and the rotating door body 2 to rotate and reset. During the movement of the second piston plate 5, the hydraulic oil in the second sealing cavity 7 can be pushed back into the first sealing cavity 6 through the connecting pipe 18. Since the connecting pipe 18 is narrow, the flow of the hydraulic oil can play a buffering role and slow down the rotation speed of the rotating door body 2 to ensure that pedestrians can pass safely. When the clamping plate 13 contacts the fixing plate 15, the fixing plate 15 can further buffer the rotating rod 10 and the rotating door body 2 and reduce the rotation speed of the rotating door body 2. Since the end of the fixing plate 15 is tapered, the clamping plate 13 can push the fixing plate 15 to slide into the fixed chute 14 first. When the fixing plate 15 is opposite to the card slot, the thrust spring 16 can push the fixing plate 15 into the card slot on the clamping plate 13, and then the rotating rod 10 and the rotating door body 2 can be stably fixed in the closed state to avoid repeated opening and closing due to poor stability and ensure safety.

[0029] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and the inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A door closer for a revolving door, comprising a door frame (1) and a revolving door body (2), characterized in that, An installation groove is formed in the front side wall of the door frame (1), and an installation box (3) is installed in the installation groove. The interior of the installation box (3) is divided into a first sealing cavity (6) and a second sealing cavity (7) for filling hydraulic oil by a sliding assembly. The first sealing cavity (6) and the second sealing cavity (7) are communicated through a communicating pipe (18). A plurality of return springs (11) are connected between the sliding assembly and the inner side wall of the first sealing cavity (6). A groove (12) is formed in the bottom of the door frame (1), and a rotating rod (10) is rotatably connected through the groove (12). The two ends of the rotating rod (10) are respectively fixedly connected with the sliding assembly and the rotating door body (2). A clamping plate (13) is fixedly connected to the side wall of the rotating rod (10), and a fixing component extending into the clamping plate (13) is arranged on the inner side wall of the groove (12).

2. The door closer for a revolving door according to claim 1, characterized in that, The sliding assembly includes a first piston plate (4) and a second piston plate (5) that are hermetically and slidably connected in the installation box (3). An annular rack plate (8) is fixedly connected between the opposite side walls of the first piston plate (4) and the second piston plate (5). A gear (9) meshing with the annular rack plate (8) is rotatably connected to the inner top of the installation box (3). The return spring (11) is connected between the first piston plate (4) and the inner side wall of the first sealing cavity (6).

3. The door closer for a revolving door according to claim 1, characterized in that, The rotating rod (10) is connected to the bottom of the gear (9) and the upper end of the rotating door body (2) by screws respectively.

4. A door closer for a revolving door according to claim 1, characterized in that, A clamping groove is formed at the end of the clamping plate (13), and the end of the clamping plate (13) is arc-shaped.

5. The door closer for a revolving door according to claim 4, characterized in that, The fixing component includes a fixing sliding groove (14) formed in the inner side wall of the groove (12). A fixing plate (15) is slidably connected in the fixing sliding groove (14). The end of the fixing plate (15) is tapered and extends into the clamping groove on the side wall of the clamping plate (13). A plurality of thrust springs (16) are connected between the fixing plate (15) and the inner side wall of the fixing sliding groove (14).

6. The closing device for a revolving door according to claim 1, characterized in that, The front side plate of the door frame (1) is connected with a plugging plate (17) opposite to the installation groove by a plurality of screws.

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