Automatic closing device applied to fireproof door or fireproof window

Abstract

The invention relates to the technical field of fireproof facilities, in particular to an automatic closing device applied to a fireproof door or a fireproof window. The device comprises a shell and an automatic closing linkage mechanism, a first mounting cavity, a second mounting cavity and a third mounting cavity which are communicated in sequence are formed in the shell; in the automatic closing linkage mechanism, a pulley assembly is arranged in a first mounting cavity, and a fixed pulley of the pulley assembly is fixedly connected with a rotating shaft; the two ends of the fixed pulley in the radial direction are connected with the piston pneumatic assembly through traction ropes correspondingly. Guide pulleys are correspondingly arranged on the outer sides of the two traction ropes respectively; the piston pneumatic assembly is slidably arranged in the third mounting cavity; in the resilience force regulation and control assembly, one end of an elastic body is arranged in the third mounting cavity and connected with the piston pneumatic assembly, and the other end of the elastic body is arranged in the second mounting cavity and connected with a resilience force regulator. According to the automatic closing linkage mechanism, automatic closing action of the fireproof door or the fireproof window can be achieved, and the service life of the automatic closing linkage mechanism can be prolonged.

Description

Technical Field

[0001] This invention relates to the field of fire protection technology, and in particular to an automatic closing device for fire doors or fire windows. Background Technology

[0002] To prevent the spread of fire, normally closed fire doors and windows should always be kept closed. However, it is inevitable that fire doors and windows will be opened at times. To prevent them from losing their original fire-resistant function due to personnel opening them without closing them, automatic closing devices must be installed. Automatic closing devices utilize the energy collected when fire doors and windows are opened to close them. Existing commercially available automatic closing devices primarily use gears, racks, or worm gears to directly move a piston when the fire door or window is opened, and then a spring returns the piston to its original position. A damping device simultaneously slows down the release of the spring's restoring energy, thus coordinating the automatic closing of the fire door or window. However, these commercially available automatic closing devices often suffer from complex structures leading to high costs. Furthermore, the direct movement of the piston using hard alloy components such as gears, racks, or worm gears increases friction during operation, making the metal prone to fatigue and resulting in a high rate of component failure.

[0003] Therefore, it is necessary to provide an automatic closing device for fire doors or fire windows to solve the problem of high cost due to complex structure of existing automatic closing devices; and to solve the problem of high component damage rate caused by the internal linkage structure of existing automatic closing devices being made of hard alloy material, resulting in high operating friction. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic closing device for fire doors or fire windows, and the specific technical solution is as follows: An automatic closing device for fire doors or fire windows includes a housing and an automatic closing linkage mechanism; The housing is connected to the door frame of a fire door or the window frame of a fire window; a first mounting cavity, a second mounting cavity, and a third mounting cavity are provided in sequence within the housing; The automatic closing linkage mechanism includes a pulley assembly, a traction rope, a piston pneumatic assembly, and a rebound force adjustment assembly. The pulley assembly is disposed in the first mounting cavity and includes a fixed pulley and a guide pulley. The fixed pulley is fixedly connected to a rotating shaft. The rotating shaft is either a rotating shaft connecting a fire door and a door frame or a rotating shaft connecting a fire window and a window frame. Both ends of the fixed pulley in the radial direction are respectively connected to the piston pneumatic assembly via the traction rope, and this radial direction is perpendicular to the plane where the fire door or fire window is located. The guide pulley is respectively disposed on the outer side of each of the two traction ropes. Both guide pulleys are rotatably disposed at the end of the first mounting cavity near the second mounting cavity. The piston pneumatic assembly is slidably disposed in the third mounting cavity. The rebound force adjustment assembly includes a rebound force regulator and a compressed elastic body. One end of the elastic body is disposed in the third mounting cavity and connected to the piston pneumatic assembly, while the other end is disposed in the second mounting cavity and connected to the rebound force regulator.

[0005] Optionally, the rebound force regulator includes a housing, a pressing rod, and a hinge block; The outer shell is connected to the elastomer; a working cavity is provided inside the outer shell; One end of the pressing rod is a pressing end, which is located outside the housing, while the other end is an insertion end, which can be movably inserted into the working cavity of the housing and the outer shell. One end of the hinge block is a hinge end, which is hinged in the working cavity and corresponds to the insertion end of the pressing rod, while the other end is a snap-fit ​​end, which can extend out of the working cavity and snap-fit ​​with the inner wall of the second mounting cavity; a first connecting hole for the extension of the hinge block and a second connecting hole for the insertion of the pressing rod are provided on the outer shell; a third connecting hole for the insertion of the pressing rod is provided on the housing. A positioning slot adapted to the snap-fit ​​end of the hinge block is provided on the inner wall of the second mounting cavity; after the snap-fit ​​end of the hinge block is snapped into the positioning slot, the hinge block is horizontally positioned; there are multiple positioning slots, which are arranged sequentially along the length direction of the inner wall of the second mounting cavity.

[0006] Optionally, all of the positioning slots are positioning racks provided on the inner wall of the second mounting cavity.

[0007] Optionally, the hinge end of the hinge block is an irregularly shaped narrow end, and an adapted working stroke space is provided in the working cavity corresponding to the irregularly shaped narrow end; The hinge blocks are hinged to both sides of the working cavity, and the hinge ends of the two hinge blocks face each other.

[0008] Optionally, the piston pneumatic assembly includes a piston body, a first pneumatic unit, and a second pneumatic unit; The piston body is slidably disposed in the third mounting cavity, and one end of the piston body near the second mounting cavity is connected to the elastic body, while the other end away from the second mounting cavity forms an air chamber with the third mounting cavity; an air intake channel and an exhaust channel communicating with the air chamber are respectively provided on the piston body along its sliding direction. The first pneumatic unit is disposed in the air intake channel and is used to control the gas outside the air chamber to enter the air chamber; The second pneumatic unit is disposed in the exhaust channel and is used to regulate the speed at which the gas inside the air chamber is discharged from the air chamber.

[0009] Optionally, the first pneumatic unit includes a one-way valve; The second pneumatic unit includes a flow regulating valve.

[0010] Optionally, the air intake passage is provided on both sides of the exhaust passage; The inner diameter of the exhaust passage is smaller than the inner diameter of the intake passage.

[0011] Optionally, the automatic closing device applied to fire doors or fire windows further includes a first limiting rod; the first limiting rod is detachably disposed within the housing and located on one side of the opening direction of the fire door or fire window; the end of the first limiting rod away from the housing is a limiting end, which is disposed corresponding to the axial end of the rotating shaft; an arc-shaped limiting groove coaxial with the rotating shaft is provided on the axial end of the rotating shaft; the limiting end of the first limiting rod is clearance-fitted into the arc-shaped limiting groove; the distance between the limiting end of the first limiting rod and the fire door or fire window, and the arc length of the arc-shaped limiting groove are all set according to the maximum opening angle of the fire door or fire window.

[0012] Optionally, the automatic closing device applied to fire doors or fire windows further includes a first limiting rod and a second limiting rod; both the first limiting rod and the second limiting rod are detachably disposed within the housing, with the first limiting rod located on the side of the fire door or fire window opening outwards and the second limiting rod located on the side of the fire door or fire window opening inwards; the ends of the first limiting rod and the second limiting rod away from the housing are both limiting ends, and are respectively disposed corresponding to the axial end of the rotating shaft; an arc-shaped limiting groove coaxial with the rotating shaft is provided on the axial end of the rotating shaft; the limiting ends of the first limiting rod and the second limiting rod are both clearance-fitted into the arc-shaped limiting groove; the distance between the limiting end of the first limiting rod and the fire door or fire window, the distance between the limiting end of the second limiting rod and the fire door or fire window, and the arc length of the arc-shaped limiting groove are all set according to the maximum opening angle of the fire door or fire window.

[0013] Optionally, the elastomer includes a spring; The two traction ropes are of equal length; An installation groove is provided on the fixed pulley, and an installation protrusion adapted to the installation groove is provided on the rotating shaft.

[0014] The application of the technical solution of the present invention has at least the following beneficial effects: (1) The present invention provides an automatic closing device for fire doors or fire windows. First, the elastic body is adjusted to a suitable compression amount by a rebound force regulator, so that the elastic body is in a suitable compression state and its rebound force is at a suitable magnitude, avoiding the fire door or fire window from failing to return due to insufficient compression of the elastic body. Then, a fixed pulley is fixedly connected to a rotating shaft, which is the rotating shaft connecting the fire door and the door frame or the rotating shaft connecting the fire window and the window frame. During the opening of the fire door or fire window, the fixed pulley rotates synchronously with the rotating shaft, thereby driving the piston pneumatic component to move by linkage with the traction rope. The movement of the piston pneumatic component will further compress the elastic body, thereby further increasing the rebound force of the elastic body, so as to provide sufficient rebound force for the automatic closing of the fire door or fire window, ensuring that the fire door or fire window returns completely and realizes the automatic closing action. Therefore, the automatic closing linkage mechanism of the present invention can not only realize the automatic closing action of the fire door or fire window, but also replace the existing hard alloy material linkage with elastic linkage, greatly reducing the running friction and extending the service life of the automatic closing linkage mechanism. Furthermore, this automatic shut-off linkage mechanism has the advantages of simple structure and low cost. Moreover, the guide pulley provided in this invention guides the movement of the piston pneumatic assembly driven by the traction rope, ensuring that the traction rope directionally drives the piston pneumatic assembly and preventing it from changing direction and jamming. The housing provided in this invention provides installation space and protection for the automatic shut-off linkage mechanism.

[0015] (2) The present invention combines a pressing rod and a hinge block in the rebound force regulator. By manually pressing the pressing rod, the insertion end of the pressing rod can press the hinge end of the hinge block, causing its locking end to disengage from the positioning slot on the inner wall of the second mounting cavity and rotate into the outer shell of the rebound force regulator through the first connecting hole. At this time, the elastic body can be adjusted to a suitable compression amount. After the adjustment is completed, the pressing rod is manually pulled out, so that the insertion end of the pressing rod disengages from the hinge end of the hinge block. The hinge block resets under the action of gravity, and its locking end engages with the positioning slot.

[0016] (3) In the piston pneumatic assembly, the present invention employs a first pneumatic unit set in the air intake channel to control the gas outside the air chamber to enter the air chamber, so as to facilitate the piston body to be linked by the fixed pulley and the traction rope to compress the elastic body, and to provide sufficient rebound force for the automatic closing action of the fire door or fire window by compressing the elastic body; a second pneumatic unit is set in the exhaust channel to regulate the speed at which the gas inside the air chamber exits the air chamber, thereby regulating the automatic closing speed of the fire door or fire window; in addition, in order to speed up or slow down the automatic closing speed of the fire door or fire window, the compression amount of the elastic body can be appropriately increased or decreased by the rebound force regulator, thereby coordinating with the second pneumatic unit to regulate the automatic closing speed of the fire door or fire window to speed up or slow down.

[0017] (4) The present invention combines a first limiting rod and an arc-shaped limiting groove to facilitate limiting the maximum angle of one-way opening of fire doors or fire windows.

[0018] (5) The present invention combines a first limiting rod, a second limiting rod and an arc-shaped limiting groove to facilitate limiting the maximum angle of bidirectional opening of fire doors or fire windows.

[0019] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of an automatic closing device for fire doors or fire windows in Embodiment 1 (the complete elastic body is not shown in the figure).

[0022] Figure 2 This is a schematic diagram of the structure of an automatic closing device for fire doors or fire windows in Embodiment 1 during the opening process of fire doors or fire windows (the complete elastic body is not shown in the figure; the direction of the black curved arrow on the fixed pulley in the figure indicates the direction when the fire door or fire window is opened, and the direction of the black straight arrow on the housing in the figure indicates the direction of movement of the piston pneumatic assembly).

[0023] Figure 3 This is a schematic diagram of the rebound force regulator in Example 1.

[0024] Figure 4 This is a schematic diagram of the structure of the rebound force regulator in Example 1 when it is adjusting the compression of the elastomer.

[0025] Figure 5 yes Figure 3 A top view of the structure in which the rebound force regulator is installed in the second mounting cavity.

[0026] Figure 6 This is a schematic diagram of an automatic closing device for fire doors or fire windows in Embodiment 2.

[0027] Figure 7 This is a schematic diagram of an automatic closing device for fire doors or fire windows in Embodiment 3.

[0028] Reference numerals in the attached diagram: 1. Housing; 1.1. First mounting cavity; 1.2. Second mounting cavity; 1.2.1. Positioning rack; 1.3. Third mounting cavity; 2. Pulley assembly; 2.1. Fixed pulley; 2.1.1. Mounting groove; 2.2. Guide pulley; 3. Traction rope; 4. Piston pneumatic assembly; 4.1. Piston body; 4.1.1. Inlet passage; 4.1.2. Exhaust passage; 4.2. First pneumatic unit; 4.3. Second pneumatic unit; 5. Rebound force adjustment assembly; 5.1. Rebound force regulator; 5.1.1. Housing; 5.1.2. Pressing rod; 5.1.3. Hinge block; 5.2. Elastomer; 6. First limiting rod; 7. Second limiting rod; 8. Air chamber. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0030] Example 1: See Figures 1-5An automatic closing device for fire doors or fire windows includes a housing 1 and an automatic closing linkage mechanism; The housing 1 is connected to the door frame of a fire door or the window frame of a fire window; a first mounting cavity 1.1, a second mounting cavity 1.2, and a third mounting cavity 1.3 are sequentially connected within the housing 1; The automatic closing linkage mechanism includes a pulley assembly 2, a traction rope 3, a piston pneumatic assembly 4, and a rebound force adjustment assembly 5. The pulley assembly 2 is disposed in the first mounting cavity 1.1 and includes a fixed pulley 2.1 and a guide pulley 2.2. The fixed pulley 2.1 is fixedly connected to a rotating shaft (not shown in the figure). The rotating shaft is a rotating shaft connecting the fire door and the door frame or a rotating shaft connecting the fire window and the window frame. A mounting groove 2.1.1 is provided on the fixed pulley 2.1, and a mounting protrusion adapted to the mounting groove 2.1.1 is provided on the rotating shaft for quick installation. Both ends of the fixed pulley 2.1 in the radial direction are respectively connected to the piston pneumatic assembly 4 through the traction rope 3, and the radial direction is perpendicular to the plane where the fire door or fire window is located. A guide pulley 2.2 is respectively provided on the outer side of the two traction ropes 3. The guide pulleys 2.2 are rotatably mounted at the end of the first mounting cavity 1.1 near the second mounting cavity 1.2. The two traction ropes 3 are of equal length, so that after the fire door or fire window is automatically closed, both traction ropes 3 are tensioned and connected to the piston pneumatic assembly 4 under the action of the elastic body 5.2, ensuring that the entire automatic closing linkage mechanism returns to its initial state. The piston pneumatic assembly 4 is slidably mounted in the third mounting cavity 1.3. The rebound force adjustment assembly 5 includes a rebound force regulator 5.1 and a compressed elastic body 5.2 (specifically a spring). One end of the elastic body 5.2 is located in the third mounting cavity 1.3 and connected to the piston pneumatic assembly 4, while the other end is located in the second mounting cavity 1.2 and connected to the rebound force regulator 5.1.

[0031] The rebound force regulator 5.1 includes a housing 5.1.1, a pressing rod 5.1.2, and a hinge block 5.1.3; The outer shell 5.1.1 is connected to the elastomer 5.2; a working cavity is provided inside the outer shell 5.1.1; One end of the pressing rod 5.1.2 is a pressing end and is located outside the housing 1, while the other end is an insertion end and can be movably inserted into the working cavity of the housing 1 and the outer shell 5.1.1; One end of the hinge block 5.1.3 is a hinge end, which is hinged in the working cavity and corresponds to the insertion end of the pressing rod 5.1.2. The other end is a snap-fit ​​end, which can extend out of the working cavity and snap-fit ​​into the inner wall of the second mounting cavity 1.2. A first connecting hole for the extension of the hinge block 5.1.3 and a second connecting hole for the insertion of the pressing rod 5.1.2 are provided on the outer shell 5.1.1. A third connecting hole for the insertion of the pressing rod 5.1.2 is provided on the housing 1. A positioning slot is provided on the inner wall of the second mounting cavity 1.2 to match the snap-fit ​​end of the hinge block 5.1.3; after the positioning slot is snapped into the snap-fit ​​end of the hinge block 5.1.3, the hinge block 5.1.3 is horizontally positioned; there are multiple positioning slots, which are arranged sequentially along the length of the inner wall of the second mounting cavity 1.2.

[0032] All of the positioning slots are positioning racks 1.2.1 provided on the inner wall of the second mounting cavity 1.2.

[0033] The hinge end of the hinge block 5.1.3 is an irregularly shaped narrow end, and an appropriate working stroke space is provided in the working cavity corresponding to the irregularly shaped narrow end; The hinge blocks 5.1.3 are hinged on both sides of the working cavity, with the hinge ends of the two hinge blocks 5.1.3 facing each other. This facilitates the rebound force regulator 5.1 in stably regulating the elastic body 5.2 to a suitable compression amount. Specifically, pressing the pressing rod 5.1.2 can simultaneously press the hinge ends of the two hinge blocks 5.1.3, causing the locking ends of the two hinge blocks 5.1.3 to simultaneously disengage from the positioning slots on the inner wall of the second mounting cavity 1.2 and rotate into the outer shell 5.1.1 of the rebound force regulator 5.1 through the first connecting hole. At this time, the elastic body 5.2 can be stably regulated to a suitable compression amount. After regulation, the pressing rod 5.1.2 is manually pulled out, causing the insertion end of the pressing rod 5.1.2 to disengage from the hinge end of the hinge block 5.1.3. The hinge block 5.1.3 resets under gravity, and its locking end engages with the positioning slot.

[0034] The piston pneumatic assembly 4 includes a piston body 4.1, a first pneumatic unit 4.2 (specifically a one-way valve) and a second pneumatic unit 4.3 (specifically a flow regulating valve). The piston body 4.1 is slidably disposed within the third mounting cavity 1.3, with one end near the second mounting cavity 1.2 connected to the elastic body 5.2, and the other end away from the second mounting cavity 1.2 forming an air chamber 8 with the third mounting cavity 1.3; an air inlet channel 4.1.1 and an exhaust channel 4.1.2 communicating with the air chamber 8 are respectively provided on the piston body 4.1 along its sliding direction. The first pneumatic unit 4.2 is installed in the air intake channel 4.1.1 and is used to control the gas outside the air chamber 8 to enter the air chamber 8, so as to realize that the piston body 4.1 is linked by the fixed pulley 2.1 and the traction rope 3 to compress the elastic body 5.2, and provide sufficient rebound force for the automatic closing action of the fire door or fire window by compressing the elastic body 5.2. The second pneumatic unit 4.3 is installed in the exhaust channel 4.1.2 and is used to regulate the speed at which the gas inside the air chamber 8 is discharged from the air chamber 8, thereby regulating the speed at which the fire door or fire window automatically closes.

[0035] The air intake passages 4.1.1 are provided on both sides of the exhaust passage 4.1.2 to facilitate the quick opening of fire doors or fire windows; The inner diameter of the exhaust channel 4.1.2 is smaller than the inner diameter of the intake channel 4.1.1, which facilitates the provision of good damping effect when the fire door or fire window closes automatically, and avoids collision problems caused by rapid closing.

[0036] In Embodiment 1, an automatic closing device for fire doors or fire windows is provided. First, the elastic body 5.2 is adjusted to a suitable compression level by the rebound force regulator 5.1, so that the elastic body 5.2 is in a suitable compressed state and its rebound force is at an appropriate magnitude, avoiding the fire door or fire window from failing to return due to insufficient compression of the elastic body 5.2. Then, a fixed pulley 2.1 is fixedly connected to a rotating shaft, which is the rotating shaft connecting the fire door and the door frame or the rotating shaft connecting the fire window and the window frame. During the opening of the fire door or fire window, the fixed pulley 2.1 rotates synchronously with the rotating shaft, thereby driving the piston pneumatic assembly 4 to move in conjunction with the traction rope 3. The movement of the piston pneumatic assembly 4 further compresses the elastic body 5.2, further increasing the rebound force of the elastic body 5.2, so as to provide sufficient rebound force for the automatic closing of the fire door or fire window, ensuring that the fire door or fire window fully returns to its original position and realizing the automatic closing action. Therefore, the automatic closing linkage mechanism used in Embodiment 1 not only enables the automatic closing of fire doors or fire windows, but also significantly reduces operating friction and extends the service life of the automatic closing linkage mechanism by replacing the existing rigid alloy material linkage with elastic linkage. Furthermore, this automatic closing linkage mechanism has the advantages of simple structure and low cost. Additionally, the guide pulley 2.2 provided in Embodiment 1 guides the movement of the piston pneumatic assembly 4 driven by the traction rope 3, ensuring that the traction rope 3 directionally drives the piston pneumatic assembly 4 and avoids deviation that could impede its movement. The housing 1 provided in Embodiment 1 provides installation space and protection for the automatic closing linkage mechanism.

[0037] Example 2: See Figure 6Unlike Embodiment 1, the automatic closing device for fire doors or fire windows further includes a first limiting rod 6. The first limiting rod 6 is detachably installed inside the housing 1 via a threaded connection and is located on one side of the opening direction of the fire door or fire window. The end of the first limiting rod 6 away from the housing 1 is a limiting end, which is provided corresponding to the axial end of the rotating shaft. An arc-shaped limiting groove (not shown in the figure) coaxial with the rotating shaft is provided on the axial end of the rotating shaft. The limiting end of the first limiting rod 6 is clearance-fitted into the arc-shaped limiting groove. The distance between the limiting end of the first limiting rod 6 and the fire door or fire window, as well as the arc length of the arc-shaped limiting groove, are all set according to the maximum opening angle of the fire door or fire window.

[0038] In Embodiment 2, the first limiting rod 6 and the arc-shaped limiting groove are combined to limit the maximum angle of one-way opening of the fire door or fire window.

[0039] Example 3: See Figure 7 Unlike Embodiment 1, the automatic closing device for fire doors or fire windows further includes a first limiting rod 6 and a second limiting rod 7; both the first limiting rod 6 and the second limiting rod 7 are detachably installed inside the housing 1 via a threaded connection, with the first limiting rod 6 located on the side of the fire door or fire window opening outwards, and the second limiting rod 7 located on the side of the fire door or fire window opening inwards; the ends of both the first limiting rod 6 and the second limiting rod 7 furthest from the housing 1 are limiting ends, and are respectively... A corresponding axial end of the rotating shaft is provided; an arc-shaped limiting groove (not shown in the figure) coaxial with the rotating shaft is provided on the axial end of the rotating shaft; the limiting ends of the first limiting rod 6 and the second limiting rod 7 are both clearance-fitted into the arc-shaped limiting groove; the distance between the limiting end of the first limiting rod 6 and the fire door or fire window, the distance between the limiting end of the second limiting rod 7 and the fire door or fire window, and the arc length of the arc-shaped limiting groove are all set according to the maximum opening angle of the fire door or fire window.

[0040] In embodiment 3, the first limiting rod 6, the second limiting rod 7, and the arc-shaped limiting groove are combined to limit the maximum angle of bidirectional opening of the fire door or fire window.

[0041] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. An automatic closing device for fire doors or fire windows, characterized in that it includes a housing (1) and an automatic closing linkage mechanism; The housing (1) is connected to the door frame of a fire door or the window frame of a fire window; a first mounting cavity (1.1), a second mounting cavity (1.2) and a third mounting cavity (1.3) are provided in the housing (1) in sequence. The automatic closing linkage mechanism includes a pulley assembly (2), a traction rope (3), a piston pneumatic assembly (4), and a rebound force adjustment assembly (5); the pulley assembly (2) is disposed in the first mounting cavity ( 1.1) includes a fixed pulley (2.1) and a guide pulley (2.2); the fixed pulley (2.1) is fixedly connected to a rotating shaft; the rotating shaft is a rotating shaft connecting the fire door and the door frame or a rotating shaft connecting the fire window and the window frame; both ends of the fixed pulley (2.1) in the radial direction are respectively connected to the piston pneumatic assembly (4) through the traction rope (3), and the radial direction is perpendicular to the plane where the fire door or fire window is located; the guide pulley (2.2) is respectively provided on the outer side of the two traction ropes (3); the two guide pulleys (2.2) All of them can be rotatably disposed at the end position of the first mounting cavity (1.1) near the second mounting cavity (1.2); the piston pneumatic assembly (4) can be slidably disposed in the third mounting cavity (1.3); the rebound force regulating assembly (5) includes a rebound force regulator (5.1) and a compressed elastic body (5.2); one end of the elastic body (5.2) is disposed in the third mounting cavity (1.3) and connected to the piston pneumatic assembly (4), while the other end is disposed in the second mounting cavity (1.2) and connected to the rebound force regulator (5.1).

2. The automatic closing device for fire doors or fire windows as described in claim 1, characterized in that, The rebound force regulator (5.1) includes a housing (5.1.1), a pressing rod (5.1.2), and a hinge block (5.1.3). The outer shell (5.1.1) is connected to the elastomer (5.2); a working cavity is provided inside the outer shell (5.1.1); One end of the pressing rod (5.1.2) is a pressing end and is located outside the housing (1), while the other end is an insertion end and can be movably inserted into the working cavity of the housing (1) and the outer shell (5.1.1); One end of the hinged locking block (5.1.3) is a hinged end, hingedly disposed within the working cavity and corresponding to the insertion end of the pressing rod (5.1.2), while the other end is a locking end, which can extend out of the working cavity and lock into the inner wall of the second mounting cavity (1.2); the outer shell (5.1.1) is provided with a mechanism for the hinged locking block (5.1.3). 5.1.3) A first connecting hole protruding and a second connecting hole for inserting the pressing rod (5.1.2); a third connecting hole for inserting the pressing rod (5.1.2) is provided on the housing (1); A positioning slot is provided on the inner wall of the second mounting cavity (1.2) to match the snap-fit ​​end of the hinge block (5.1.3); after the positioning slot is snapped into the snap-fit ​​end of the hinge block (5.1.3), the hinge block (5.1.3) is horizontally positioned; there are multiple positioning slots, which are arranged sequentially along the length direction of the inner wall of the second mounting cavity (1.2).

3. The automatic closing device for fire doors or fire windows as described in claim 2, characterized in that, All of the positioning slots are positioning racks (1.2.1) provided on the inner wall of the second mounting cavity (1.2).

4. The automatic closing device for fire doors or fire windows as described in claim 2, characterized in that, The hinge end of the hinge block (5.1.3) is an irregularly shaped narrow end, and an appropriate working stroke space is provided in the working cavity corresponding to the irregularly shaped narrow end. The hinged locking blocks are hinged to both sides of the working cavity. 5.1.3), and the hinge ends of the two hinge blocks (5.1.3) are arranged facing each other.

5. The automatic closing device for fire doors or fire windows as described in claim 2, characterized in that, The piston pneumatic assembly (4) includes a piston body (4.1), a first pneumatic unit (4.2), and a second pneumatic unit (4.3). The piston body (4.1) is slidably disposed within the third mounting cavity (1.3), with one end near the second mounting cavity (1.2) connected to the elastic body (5.2), and the other end away from the second mounting cavity (1.2) forming an air chamber (8) with the third mounting cavity (1.3); air inlet channels communicating with the air chamber (8) are respectively provided on the piston body (4.1) along its sliding direction. 4.1.1) and exhaust passage (4.1.2); The first pneumatic unit (4.2) is disposed in the air intake channel ( 4.1.1) Inside, for controlling the gas outside the gas chamber (8) to enter the gas chamber (8); The second pneumatic unit (4.3) is disposed in the exhaust channel (4.1.2) and is used to regulate the speed at which the gas inside the air chamber (8) is discharged from the air chamber (8).

6. The automatic closing device for fire doors or fire windows as described in claim 5, characterized in that the first pneumatic unit (4.2) includes a one-way valve; The second pneumatic unit (4.3) includes a flow regulating valve.

7. The automatic closing device for fire doors or fire windows as described in claim 5, characterized in that the air inlet channel (4.1.1) is provided on both sides of the exhaust channel (4.1.2). The inner diameter of the exhaust passage (4.1.2) is smaller than the inner diameter of the intake passage (4.1.1).

8. The automatic closing device for fire doors or fire windows as described in any one of claims 1 to 7, characterized in that, It also includes a first limiting rod (6); the first limiting rod (6) is detachably disposed inside the housing (1) and located on one side of the opening direction of the fire door or fire window; the end of the first limiting rod (6) away from the housing (1) is the limiting end, which is disposed corresponding to the axial end of the rotating shaft; an arc-shaped limiting groove coaxial with the rotating shaft is disposed on the axial end of the rotating shaft; the limiting end of the first limiting rod (6) is disposed in the arc-shaped limiting groove with clearance fit; the distance between the limiting end of the first limiting rod (6) and the fire door or fire window, and the arc length of the arc-shaped limiting groove are all set according to the maximum opening angle of the fire door or fire window.

9. The automatic closing device for fire doors or fire windows as described in any one of claims 1 to 7, characterized in that, It also includes a first limiting rod (6) and a second limiting rod (7); both the first limiting rod (6) and the second limiting rod (7) are detachably disposed within the housing (1), and the first limiting rod (6) is located on the side of the fire door or fire window opening outward, and the second limiting rod (7) is located on the side of the fire door or fire window opening inward; the ends of the first limiting rod (6) and the second limiting rod (7) away from the housing (1) are both limiting ends, and are respectively disposed corresponding to the axial end of the rotating shaft; an arc-shaped limiting groove coaxial with the rotating shaft is disposed on the axial end of the rotating shaft; the limiting ends of the first limiting rod (6) and the second limiting rod (7) are both clearance-fitted within the arc-shaped limiting groove; the distance between the limiting end of the first limiting rod (6) and the fire door or fire window, the distance between the limiting end of the second limiting rod (7) and the fire door or fire window, and the arc length of the arc-shaped limiting groove are all set according to the maximum opening angle of the fire door or fire window.

10. The automatic closing device for fire doors or fire windows as described in claim 8 or 9, characterized in that, The elastic body (5.2) includes a spring; The two traction ropes (3) are of equal length; An installation groove (2.1.1) is provided on the fixed pulley (2.1), and an installation protrusion adapted to the installation groove (2.1.1) is provided on the rotating shaft.

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