Fire ventilation system fire damper fusing closing trigger device

Abstract

The fireproof valve of fire ventilation system is closed by melting and triggering device. It relates to the technical field of ventilation system. It comprises a rotating column, which is rotatably arranged in a control box; a micro switch, which is fixedly arranged on one side of the rotating column; a triggering boss, which is arranged on the rotating column and is matched with the micro switch, and the micro switch is controlled to be opened or closed by the triggering boss; a spring, one end of which is connected with the rotating column and the other end is connected with the control box; and a triggering arm, one end of which is fixedly arranged on the top of the rotating column and the other end is provided with a limiting opening matched with a temperature sensing element. The utility model solves the defects of traditional manual closing device, i.e. only action and no signal feedback, and the melting and closing action synchronously triggers the state change of the micro switch, the background can identify the melting and closing state of the fireproof valve in real time, and the problem of closing without reason is avoided.

Description

Technical Field

[0001] This utility model relates to the field of ventilation system technology, and in particular to a fire damper fusion shut-off trigger device for fire ventilation systems. Background Technology

[0002] Fire dampers are crucial devices in fire-fighting ventilation systems used to block the spread of fire and control the diffusion of smoke. They are mainly installed on the supply and return air ducts of ventilation and air conditioning systems. Under normal circumstances, fire dampers are in the open position, ensuring air circulation in the ventilation and air conditioning system. When a fire occurs, flames or high-temperature airflow activate the temperature-sensing element on the fire damper, causing it to close rapidly under the force of a spring or actuator, thereby blocking the spread of fire and smoke through the duct and preventing the fire from escalating.

[0003] During equipment installation, final acceptance, regular maintenance, system upgrades, and troubleshooting, temperature-sensitive fire dampers often need to be manually closed. However, back-office personnel often cannot distinguish whether the closure is triggered by a fire or manually operated. Therefore, within the constraints of existing enclosure space, designing a device that can identify the fused closure status of temperature-sensitive fire dampers has become a pressing technical problem to be solved in this case. Utility Model Content

[0004] To address the above problems, this utility model provides a fire damper fusion-closing triggering device for fire ventilation systems that has a compact structure and can identify the fusion-closing state of temperature-sensitive fire dampers.

[0005] The technical solution of this utility model is: A fire damper fusible link triggering device for fire ventilation systems, characterized in that it comprises: The rotating column is rotatably mounted inside the control box; A micro switch is fixedly mounted on one side of the rotating column; the rotating column is provided with a trigger boss adapted to the micro switch, and the micro switch is controlled to be turned on or off by the trigger boss; A spring, one end of which is connected to the rotating column, and the other end of which is connected to the control box; The trigger arm has one end fixedly mounted on the top of the rotating column, and the other end is provided with a limiting port adapted to the temperature sensing element.

[0006] Specifically, the rotating column is provided with a trigger ring located on the side of the micro switch; The trigger ring is fixedly disposed at the bottom of the rotating column; The trigger boss is fixedly located on the outside of the trigger ring and is adapted to the micro switch.

[0007] Specifically, the micro switch is fixedly installed inside the control box.

[0008] Specifically, the spring is connected to the rotating column via a pull rod.

[0009] Specifically, the pull rod is adjustablely and fixedly mounted on the rotating column.

[0010] Specifically, the pull rod is rod-shaped, with a threaded end at one end and a connecting hole at the other end that is adapted to the spring.

[0011] Specifically, the limiting port is oriented toward the rotation direction of the trigger arm.

[0012] Specifically, the opening of the limiting port has a structure that is wider on the outside and narrower on the inside.

[0013] Specifically, a pressing part is provided on the trigger arm on the side opposite to the limiting port.

[0014] Specifically, the pressing part extends obliquely upward.

[0015] This invention solves the problem of traditional manual closing devices that "can only operate but have no signal feedback" by adapting the trigger boss to the micro switch. The fusible link closing action synchronously triggers the micro switch state change, and the backend can identify the fusible link closing status of the fire damper in real time, avoiding the problem of "unknown cause after closing". Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model in state one; Figure 2 This is a schematic diagram of the second state structure of this utility model; Figure 3 This is a schematic diagram of the connection structure between the rotating column and the trigger ring; In the diagram, 100 is the rotating column, 200 is the micro switch, 300 is the trigger ring, 400 is the spring, 410 is the pull rod, 500 is the trigger arm, 510 is the limit port, 520 is the pressing part, 600 is the control box, and 700 is the temperature sensing element. Detailed Implementation

[0017] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0018] In the description of this utility model, it should be understood that the terms "upper," "lower," "left," "right," "vertical," "horizontal," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] The following is for reference. Figure 1-3 Description based on embodiments of the present utility model; The fire damper fusible link trigger device for fire ventilation system includes: The rotating column 100 is rotatably mounted inside the control box 600; A micro switch 200 is fixedly disposed on one side of the rotating column 100; the rotating column 100 is provided with a trigger boss adapted to the micro switch 200, and the micro switch 200 is controlled to be turned on or off through the trigger boss; Spring 400, one end is connected to the rotating column 100, and the other end is connected to the control box 600; The trigger arm 500 has one end fixedly mounted on the top of the rotating column 100, and the other end is provided with a limiting port 510 adapted to the temperature sensing element 700, with the limiting port 510 facing the rotation direction of the trigger arm 500.

[0021] In the prior art, the temperature sensing element 700 is a conventional device, fixedly installed inside the control box 600. When the ambient temperature reaches the temperature sensing element's set threshold (70℃ / 280℃), the element automatically melts and breaks, requiring no manual intervention. After the temperature sensing element 700 senses that the set value has been reached, it melts and the top telescopic head descends.

[0022] The telescopic head at the top of the temperature sensing element 700 is inserted into the limiting port 510 of the trigger arm 500, thus limiting the trigger arm. At this time, the spring 400 is in a stretched state, and the rotating column 100 is kept at a fixed angle due to the limiting of the trigger arm 500. The trigger boss on the rotating column 100 does not contact the micro switch 200, the micro switch 200 is in an initial open state, and the fire damper remains open.

[0023] When a fire occurs and the temperature sensing element 700 melts, the telescopic head at the top of the temperature sensing element 700 descends, and the limiting port 510 disengages from the temperature sensing element 700. After losing its limiting position, the spring 400 releases its stored energy, and the trigger arm 500 moves towards... Figure 2 Rotation of direction.

[0024] During the rotation of the rotating column 100, the trigger boss on it moves synchronously with the rotating column 100, gradually contacting and pressing the trigger end of the micro switch 200, causing the on / off state of the micro switch 200 to change (from off to on); this state change signal is transmitted to the background control system through the line to realize the state feedback of "fire damper melt closed".

[0025] When manually closing, disassemble the linkage structure (such as connecting rod or gear) on the rotating column 100, and power the actuator on the blade separately to drive the blade to rotate to the closed position, thus completing the manual closing action without triggering the signal of the micro switch 200.

[0026] A trigger ring 300 is provided on the rotating column 100, located on the side of the micro switch 200; the trigger ring 300 is detachably and fixedly mounted on the bottom of the rotating column 100 via a connector; a trigger boss is fixedly located on the outside of the trigger ring 300 and is adapted to the micro switch 200. The micro switch 200 is fixedly mounted inside the control box 600.

[0027] The spring 400 is connected to the rotating column 100 via the pull rod 410.

[0028] The pull rod 410 is adjustablely fixed to the rotating column 100 via a thread. In this case, the pull rod 410 is rod-shaped, with a threaded end at one end and a connecting hole at the other end that is adapted to the spring 400.

[0029] The opening of the limiting port 510 in this case has a structure that is wider on the outside and narrower on the inside, which makes it easy for the top of the temperature sensing element 700 to quickly snap into the limiting port 510.

[0030] A pressing part 520 is provided on the trigger arm 500 on the side opposite to the limiting port 510.

[0031] The pressing part 520 is tilted upward (towards) Figure 3 (The direction is for reference) extends to facilitate downward pressing.

[0032] Reinstall the fuse, rotate the rotating column 100 in the opposite direction by pressing part 520 to recharge the spring 400, and then re-insert the temperature sensing element 700 into the limit port 510 of the trigger arm 500. The micro switch 200 returns to its initial state as the rotating column resets, and the device returns to the initial standby mode.

[0033] Regarding the information disclosed in this case, the following points need to be clarified: (1) The accompanying drawings of the embodiments disclosed in this case only involve the structures involved in the embodiments disclosed in this case; other structures can refer to the general design. (2) Where there is no conflict, the embodiments and features disclosed in this case can be combined with each other to obtain new embodiments; The above are merely specific embodiments disclosed in this case, but the scope of protection of this disclosure is not limited thereto. The scope of protection disclosed in this case shall be determined by the scope of protection of the claims.

Claims

1. A fire damper fusible link triggering device for a fire ventilation system, characterized in that, include: The rotating column (100) is rotatably mounted inside the control box (600); A micro switch (200) is fixedly disposed on one side of the rotating column (100); the rotating column (100) is provided with a trigger boss adapted to the micro switch (200), and the micro switch (200) is controlled to open or close through the trigger boss; A spring (400) is connected at one end to the rotating column (100) and at the other end to the control box (600); The trigger arm (500) has one end fixedly mounted on the top of the rotating column (100), and the other end is provided with a limiting port (510) adapted to the temperature sensing element (700).

2. The fire damper fusible link triggering device for fire ventilation system according to claim 1, characterized in that, The rotating column (100) is provided with a trigger ring (300) located on the side of the micro switch (200). The trigger ring (300) is fixedly disposed at the bottom of the rotating column (100); The trigger boss is fixedly located outside the trigger ring (300) and is adapted to the micro switch (200).

3. The fire damper fusion shut-off triggering device for fire-fighting ventilation systems according to claim 1, characterized in that, The micro switch (200) is fixedly installed inside the control box (600).

4. The fire damper fusible link triggering device for fire ventilation system according to claim 1, characterized in that, The spring (400) is connected to the rotating column (100) via a pull rod (410).

5. The fire damper fusible link triggering device for fire ventilation system according to claim 4, characterized in that, The pull rod (410) is adjustable and fixedly mounted on the rotating column (100).

6. The fire damper fusible link triggering device for fire ventilation system according to claim 4, characterized in that, The pull rod (410) is rod-shaped, with a threaded end at one end and a connecting hole at the other end that is adapted to the spring (400).

7. The fire damper fusible link triggering device for fire ventilation system according to claim 1, characterized in that, The limiting port (510) is oriented toward the rotation direction of the trigger arm (500).

8. The fire damper fusion shut-off triggering device for a fire ventilation system according to claim 1 or 7, characterized in that, The opening of the limiting port (510) has a structure that is wider on the outside and narrower on the inside.

9. The fire damper fusible link triggering device for fire ventilation system according to claim 1, characterized in that, The trigger arm (500) is provided with a pressing part (520) on the side opposite to the limiting port (510).

10. The fire damper fusible link triggering device for fire ventilation system according to claim 9, characterized in that, The pressing part (520) extends obliquely upward.

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