A type of buffer door closer

Abstract

This utility model relates to the field of fire doors and discloses a buffer door closer, which includes an external mechanism comprising a hollow tube and an internal mechanism comprising a piston slidably connected inside the hollow tube, and a reset component and a venting component disposed inside the hollow tube. The reset component is used to reset the piston, and the venting component includes a small hole. A buffer zone is disposed inside the hollow tube. When the piston resets to the buffer zone, the air inside the buffer zone is slowly discharged through the small hole. During the opening process, when the piston body passes through the buffer zone, air enters the buffer zone through both a one-way valve and the small hole, ensuring smooth opening. During the closing process, when the piston body passes through the buffer zone, air is discharged from the buffer zone only through the small hole, which buffers the piston body and thus provides buffer protection for the fire door.

Description

Technical Field

[0001] This utility model relates to the field of fire doors, and in particular to a buffer door closer. Background Technology

[0002] Fire doors should generally be kept closed during normal use to ensure effective isolation of fire and smoke in the event of a fire, protecting personnel safety and minimizing property damage. To achieve this function, fire doors are usually equipped with door closers. The main function of the door closer is to ensure that the door automatically closes after being opened, thus playing an isolation role in the event of a fire.

[0003] However, most door closers on the market currently lack a buffer function when closing, causing the door to close too quickly and potentially damaging the door frame and lock. This problem not only affects the lifespan of fire doors but may also reduce their protective performance in emergencies. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is: how to make the fire door be buffered and protected when it is closed.

[0005] The above-mentioned technical problems are solved by the following technical solution: This utility model proposes a buffer door closer, which includes,

[0006] External mechanism, the external mechanism including a hollow tube;

[0007] The internal mechanism includes a piston slidably connected inside the hollow tube, and a reset component and a venting component disposed inside the hollow tube.

[0008] The reset component is used to reset the piston;

[0009] The ventilation component includes small holes;

[0010] The hollow tube is equipped with a buffer zone. When the piston returns to the buffer zone, the air inside the buffer zone is slowly discharged through the small hole to achieve a buffering effect.

[0011] In a preferred embodiment of the buffer door closer of this utility model: the hollow tube includes a hollow tube body and a groove formed inside the hollow tube body;

[0012] The hollow tube body has one end A and the other end B. The interior of the hollow tube body is hollow, allowing the piston to slide inside the hollow tube body.

[0013] In a preferred embodiment of the buffer door closer of this utility model: the external mechanism further includes a mounting component installed on the outside of the hollow tube;

[0014] The mounting components include a first flange fixedly connected to end A of the hollow tube body, and a second flange fixedly connected to end B of the hollow tube body. The installation method using the first flange, the second flange, and bolts makes the installation of the hollow tube body simple and convenient.

[0015] In a preferred embodiment of the buffer door closer of this utility model: the piston includes a piston body slidably connected inside the hollow tube body, and a connecting rod fixedly connected to the outside of the piston body. The fire door is connected to the connecting rod, so that the fire door can drive the connecting rod to move, and in turn, the connecting rod drives the piston body to move.

[0016] In a preferred embodiment of the buffer door closer of this utility model: the reset component includes a hollow shaft disposed inside the hollow tube body, and a spring sleeved on the outside of the hollow shaft;

[0017] The piston body is slidably connected to the outside of the hollow shaft, and one end of the hollow shaft is fixedly connected to end A of the hollow tube body;

[0018] One end of the spring is fixedly connected to end A of the hollow tube body, and the other end of the spring is fixedly connected to the outside of the piston body.

[0019] In a preferred embodiment of the buffer door closer of this utility model: the ventilation component includes a one-way valve installed at one end of the hollow shaft, a through hole opened at end A of the hollow tube body, and a small hole opened at end B of the hollow tube body.

[0020] In a preferred embodiment of the buffer door closer of this utility model: the one-way valve is installed at one end of the hollow shaft, which is fixedly connected to end A of the hollow tube body, and there is a gap between the other end of the hollow shaft and end B of the hollow tube body.

[0021] In a preferred embodiment of the buffer door closer of this utility model: the area between the B end of the hollow tube body and the slide groove is the buffer zone, and as the piston body moves from the B end of the hollow tube body to the A end of the hollow tube body, the pressure on the spring gradually increases.

[0022] The beneficial effects of this utility model are as follows: during the opening process, when the piston body passes through the buffer zone, air enters the buffer zone through the one-way valve and the small hole, which can ensure smooth opening. During the closing process, when the piston body passes through the buffer zone, air is discharged from the buffer zone only through the small hole, which can buffer the piston body and thus buffer and protect the fire door. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments of this utility model will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this utility model and are not intended to limit the scope of this utility model. Wherein:

[0024] Figure 1 A schematic diagram of the overall structure of this utility model is shown;

[0025] Figure 2 A cross-sectional schematic diagram of the present invention is shown;

[0026] Figure 3 A schematic diagram of the buffer zone of this utility model is shown. Detailed Implementation

[0027] To enable those skilled in the art to better understand this utility model, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0028] The terminology used in this invention refers to those general terms currently widely used in the art in consideration of the functionality of this invention; however, these terms may vary according to the intent, precedent, or new technology of those skilled in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of this invention. Therefore, the terminology used in this specification should not be construed as simple names, but rather based on the meaning of the terms and the overall description of this invention.

[0029] Reference Figures 1-3 This embodiment provides a buffer door closer, including,

[0030] External mechanism 1, which includes hollow tube 11;

[0031] Internal mechanism 2 includes a piston 21 that is slidably connected inside the hollow tube 11, and a reset component 22 and a ventilation component 23 disposed inside the hollow tube 11.

[0032] Reset component 22 is used to reset piston 21;

[0033] The ventilation component 23 includes a small hole 233, which has a small diameter.

[0034] The hollow tube 11 has a buffer zone 113 inside. When the piston 21 is reset to the buffer zone 113, the air inside the buffer zone 113 is slowly discharged through the small hole 233.

[0035] When the door is closed, piston 21 slowly discharges the air inside buffer 113 through small hole 233. Because the opening of small hole 233 is small, the air passes through slowly, thus preventing piston 21 from passing through buffer 113 quickly, thereby achieving a buffering effect on piston 21.

[0036] As one embodiment provided in this application, such as Figures 1-3 The hollow tube 11 includes a hollow tube body 111 and a groove 112 formed inside the hollow tube body 111.

[0037] The hollow tube body 111 has one end A and the other end B, and the hollow tube body 111 is set in an arc shape.

[0038] The hollow tube body 111 has a hollow interior, allowing the piston 21 to slide inside the hollow tube body 111.

[0039] As one embodiment provided in this application, such as Figures 1-3 The external mechanism 1 also includes a mounting component 12 installed on the outside of the hollow tube 11;

[0040] The mounting component 12 includes a first flange 121 fixedly connected to end A of the hollow tube body 111, and a second flange 122 fixedly connected to end B of the hollow tube body 111. The first flange 121 and the second flange 122 are the same.

[0041] During installation, ensure that the center of the hollow tube body 111 is on the same vertical line as the fire door hinge, and fix the first flange 121 and the second flange 122 to the door frame or wall with bolts.

[0042] The installation method using a first flange 121, a second flange 122, and bolts makes the installation of the hollow tube body 111 simple and convenient.

[0043] As one embodiment provided in this application, such as Figures 1-3 The piston 21 includes a piston body 211 that is slidably connected inside the hollow tube body 111, and a connecting rod 212 that is fixedly connected to the outside of the piston body 211. The connecting rod 212 has an installation hole inside.

[0044] After the hollow tube body 111 is installed, the connecting rod 212 is bolted to the outside of the fire door, so that the fire door can drive the connecting rod 212 to move, and then the connecting rod 212 drives the piston body 211 to move.

[0045] As one embodiment provided in this application, such as Figures 1-3 The reset component 22 includes a hollow shaft 221 disposed inside the hollow tube body 111, and a spring 222 sleeved on the outside of the hollow shaft 221.

[0046] The piston body 211 is slidably connected to the outside of the hollow shaft 221, and one end of the hollow shaft 221 is fixedly connected to end A of the hollow tube body 111.

[0047] One end of the spring 222 is fixedly connected to end A of the hollow tube body 111, and the other end of the spring 222 is fixedly connected to the outside of the piston body 211. The hollow shaft 221 is hollow inside, allowing air to circulate.

[0048] When the fire door is opened, the connecting rod 212 drives the piston body 211 to move. The piston body 211 moves from end B to end A inside the hollow tube body 111. During this process, the spring 222 is compressed.

[0049] When the fire door is closed, the spring 222 will cause the piston body 211 to return to its original position from end A to end B under the action of the spring force. In turn, the piston body 211 will drive the fire door to return to its original position through the connecting rod 212.

[0050] By installing spring 222, the fire door can be automatically closed when it is released, thus playing an isolation role in the event of a fire.

[0051] As one embodiment provided in this application, such as Figures 1-3 The ventilation component 23 includes a one-way valve 231 installed at one end of the hollow shaft 221, a through hole 232 opened at the A end of the hollow tube body 111, and a small hole 233 opened at the B end of the hollow tube body 111. The one-way valve 231 can only allow air to enter the hollow shaft 221 from the outside of the hollow tube body 111.

[0052] One-way valve 231 is installed at one end of hollow shaft 221, which is fixedly connected to end A of hollow tube body 111, and there is a gap between the other end of hollow shaft 221 and end B of hollow tube body 111.

[0053] The area between the B end of the hollow tube body 111 and the slide 112 is a buffer zone 113. When air enters the hollow shaft 221 through the one-way valve 231, due to the gap between the hollow shaft 221 and the B end of the hollow tube body 111, the air will pass through the hollow shaft 221 and the gap into the buffer zone 113.

[0054] As the piston body 211 moves from end B of the hollow tube body 111 to end A of the hollow tube body 111, the pressure on the spring 222 gradually increases.

[0055] During the opening process, when the piston 21 moves from end B to end A of the hollow tube body 111, it must first pass through the buffer zone 113. During this process, air enters the buffer zone 113 from the outside of the hollow tube body 111 through the small hole 233, and the air also enters the hollow shaft 221 through the one-way valve 231, and then enters the buffer zone 113 through the gap between the hollow shaft 221 and the hollow tube body 111.

[0056] Therefore, when the door is opened, as the piston 21 passes through the buffer zone 113, air enters the buffer zone 113 together with the small hole 233 and the one-way valve 231, which ensures that the piston 21 slides smoothly inside the buffer zone 113, thus ensuring a smooth door opening process.

[0057] When the door is closed, as the piston body 211 moves from end A to end B of the hollow tube body 111, after the piston body 211 enters the buffer zone 113, it needs to expel the air inside the buffer zone 113 as it continues to move. At this time, since the one-way valve 231 can only allow air to enter the hollow shaft 221 but cannot expel the air inside the hollow shaft 221, the air can only be discharged through the small hole 233 when the piston body 211 moves inside the buffer zone 113. Since the small hole 233 has a small diameter, the gas is discharged slowly, which can buffer the piston body 211.

[0058] In summary, during the opening process, when the piston body 211 passes through the buffer zone 113, air enters the buffer zone 113 through both the one-way valve 231 and the small hole 233, ensuring smooth opening. During the closing process, when the piston body 211 passes through the buffer zone 113, air is discharged from the buffer zone 113 only through the small hole 233, which allows the piston body 211 to be buffered, thereby providing buffer protection for the fire door.

[0059] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of this utility model.

Claims

1. A buffer door closer, characterized in that: include, An external mechanism (1) comprising a hollow tube (11); The internal mechanism (2) includes a piston (21) slidably connected inside the hollow tube (11), and a reset component (22) and a ventilation component (23) disposed inside the hollow tube (11); The reset component (22) is used to reset the piston (21); The ventilation component (23) includes a small hole (233); The hollow tube (11) is provided with a buffer zone (113). When the piston (21) is reset to the buffer zone (113), the air inside the buffer zone (113) is slowly discharged through the small hole (233).

2. The buffer door closer according to claim 1, characterized in that: The hollow tube (11) includes a hollow tube body (111) and a groove (112) formed inside the hollow tube body (111); The hollow tube body (111) has end A at one end and end B at the other end.

3. The buffer door closer according to claim 2, characterized in that: The external mechanism (1) also includes a mounting component (12) installed on the outside of the hollow tube (11); The mounting component (12) includes a first flange (121) fixedly connected to the A end of the hollow tube body (111) and a second flange (122) fixedly connected to the B end of the hollow tube body (111).

4. The buffer door closer according to claim 3, characterized in that: The piston (21) includes a piston body (211) slidably connected inside the hollow tube body (111) and a connecting rod (212) fixedly connected to the outside of the piston body (211).

5. The buffer door closer according to claim 4, characterized in that: The reset component (22) includes a hollow shaft (221) disposed inside the hollow tube body (111) and a spring (222) sleeved on the outside of the hollow shaft (221); The piston body (211) is slidably connected to the outside of the hollow shaft (221), and one end of the hollow shaft (221) is fixedly connected to end A of the hollow tube body (111). One end of the spring (222) is fixedly connected to end A of the hollow tube body (111), and the other end of the spring (222) is fixedly connected to the outside of the piston body (211).

6. The buffer door closer according to claim 5, characterized in that: The ventilation component (23) includes a one-way valve (231) installed at one end of the hollow shaft (221), a through hole (232) opened at the A end of the hollow tube body (111), and a small hole (233) opened at the B end of the hollow tube body (111).

7. The buffer door closer according to claim 6, characterized in that: The one-way valve (231) is installed at one end of the hollow shaft (221), which is fixedly connected to the A end of the hollow tube body (111), and there is a gap between the other end of the hollow shaft (221) and the B end of the hollow tube body (111).

8. The buffer door closer according to claim 7, characterized in that: The area between the B end of the hollow tube body (111) and the slide groove (112) is the buffer zone (113). During the process of the piston body (211) moving from the B end of the hollow tube body (111) to the A end of the hollow tube body (111), the pressure on the spring (222) gradually increases.

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