Executing mechanism of fireproof valve

Abstract

The utility model discloses a fire damper executing mechanism which comprises a shell part and a safety part arranged on the shell part. A temperature sensor is arranged on the shell part, and a safety hook matched with the temperature sensor is arranged on the safety part; the shell part is further provided with a wrench part which abuts against the safety hook and drives the safety hook to reset. The safety hook comprises a hook plate, a hook body connected with the hook plate and an abutting body, and the hook body is matched with the temperature sensor; the wrench part comprises an action wrench arranged on the temperature sensor in a sleeving mode and a reset body arranged on the action wrench and connected with the abutting body in an abutting mode. According to the utility model, the wrench part is designed to reset the safety hook, and during resetting, a detection worker drives the wrench to move, so that the resetting body of the wrench is propped against the propping body of the safety hook, the hook plate rotates, the hook body is separated from the temperature sensor, the safety hook is reset on the premise that the temperature sensor is not damaged, and the safety part is further reset; and the subsequent detection work is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of fire dampers, specifically a fire damper actuator. Background Technology

[0002] A fire damper is a device installed on the ductwork of a mechanical smoke exhaust system or at the intake of a smoke exhaust fan. Normally open, it closes when the temperature inside the duct becomes too high, effectively blocking smoke and fire to prevent the spread of fire from the fire ductwork to adjacent buildings or other areas. A fire damper typically consists of a valve body and an actuator, which controls the opening and closing of the valve.

[0003] The current fire damper actuator works by hooking a safety hook to a temperature sensor. The temperature sensor detects the temperature, and if the temperature is too high, the connection between the temperature sensor and the safety hook breaks or drops, causing the safety hook to detach from the temperature sensor and thus closing the valve body, thereby preventing smoke and fire.

[0004] However, the fire damper actuator needs to be inspected regularly. During the inspection, the safety hook needs to be reset to avoid the fire damper actuator that has not been reset affecting the inspection results.

[0005] Therefore, it is necessary to design a fire damper actuator with a reset structure to facilitate regular inspection, which is a problem that needs to be solved. Utility Model Content

[0006] Purpose of the utility model: To provide a fire damper actuator to solve the above-mentioned problems existing in the prior art.

[0007] Technical solution: A fire damper actuator, comprising:

[0008] A housing portion, and a safety portion provided on the housing portion;

[0009] The housing is provided with a temperature sensor, and the safety part is provided with a safety hook adapted to the temperature sensor; the housing is also provided with a wrench part that abuts against the safety hook and drives the safety hook to reset.

[0010] The safety hook includes a hook plate, a hook body connected to the hook plate, and an abutment body, wherein the hook body is adapted to the temperature sensor;

[0011] The wrench part includes an actuating wrench sleeved on the temperature sensor, and a resetting body disposed on the actuating wrench and abutting against the contact body.

[0012] This invention utilizes a wrench-shaped mechanism to reset the safety hook. During reset, the operator moves the wrench, causing its reset body to contact the safety hook's contact body. This causes the hook plate to rotate, disengaging the hook from the temperature sensor. Thus, the safety hook is reset without damaging the temperature sensor, thereby resetting the safety mechanism and facilitating subsequent testing.

[0013] In a further embodiment, the shell portion includes a housing and a limiting pin disposed on the housing;

[0014] The temperature sensor is connected to the housing.

[0015] In a further embodiment, the safety unit includes a reset wrench and an airflow regulating plate connected to the reset wrench;

[0016] A drive shaft that is plugged into the housing is installed on the air volume regulating plate;

[0017] The safety hook is rotatably connected to the air volume regulating plate.

[0018] A drive coil spring is provided between the drive shaft and the housing;

[0019] The reset wrench is connected to the air volume adjustment plate via a wing screw.

[0020] In a further embodiment, a connecting pin is connected to the air volume regulating plate;

[0021] The hook plate is sleeved on the connecting pin, and a safety coil spring is provided between the connecting pin and the hook plate; by designing the safety coil spring, a torque is generated between the hook plate and the connecting pin, so that the hook body can hook onto the temperature sensor;

[0022] The hook plate is equipped with a limiting body that abuts against the airflow regulating plate. By designing the limiting body, the hook plate has a certain stroke, preventing it from exceeding the rotation stroke and affecting operation.

[0023] In a further embodiment, the wrench has a movement groove that is adapted to the limiting pin; by providing the movement groove, the wrench can swing along the temperature sensor.

[0024] The wrench has an adapter slot that matches the temperature sensor. By designing the adapter slot, the wrench can be fitted onto the temperature sensor.

[0025] In a further embodiment, a safety spring is provided between the wrench and the housing. By designing the safety spring, the wrench is held in a certain position when no external force is applied, thus preventing accidental activation.

[0026] Beneficial effects: This utility model discloses a fire damper actuator. This utility model uses a wrench to reset the safety hook. During reset, the operator moves the wrench, causing the reset body of the wrench to come into contact with the contact body of the safety hook, causing the hook plate to rotate and the hook body to disengage from the temperature sensor. This resets the safety hook without damaging the temperature sensor, thus resetting the safety mechanism and facilitating subsequent testing. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of this utility model.

[0028] Figure 2 This is a schematic diagram of the component structure of this utility model.

[0029] Figure 3 This is a schematic diagram of the safety hook structure of this utility model.

[0030] Figure 4 This is a schematic diagram of the contact between the safety hook and the wrench part of this utility model.

[0031] The attached figures are labeled as follows:

[0032] 1. Housing; 11. Outer shell; 12. Temperature sensor; 13. Drive shaft; 131. Drive coil spring; 132. Shaft fixing plate; 14. Limit pin;

[0033] 2. Wrench part; 21. Operating wrench; 22. Moving groove; 23. Adaptor groove; 24. Reset body;

[0034] 3. Safety device; 31. Reset wrench; 32. Airflow control plate; 33. Wing screw;

[0035] 34. Safety hook; 341. Hook body; 342. Limiting body; 343. Connecting pin; 3431. Washer; 344. Abutting body; 345. Safety coil spring; 346. Hook plate;

[0036] 4. Safety spring; 5. Snap ring. Detailed Implementation

[0037] This application relates to a fire damper actuator, which will be explained in detail below through specific embodiments.

[0038] A fire damper actuator includes:

[0039] Housing 1, and a safety part 3 provided on the housing 1;

[0040] The housing 1 is provided with a temperature sensor 12, and the safety part 3 is provided with a safety hook 34 adapted to the temperature sensor 12; the housing 1 is also provided with a wrench part 2 that abuts against the safety hook 34 and drives the safety hook 34 to reset.

[0041] The safety hook 34 includes a hook plate 346, a hook body 341 and an abutment body 344 connected to the hook plate 346, and the hook 341 is adapted to the temperature sensor 12.

[0042] The wrench part 2 includes an actuating wrench 21 sleeved on the temperature sensor 12, and a resetting body 24 disposed on the actuating wrench 21 and abutting against the contact body 344.

[0043] This utility model uses a wrench part 2 to reset the safety hook 34. During reset, the inspection worker drives the wrench to move, so that the reset body 24 of the wrench abuts against the contact body 344 of the safety hook 34, causing the hook plate 346 to rotate and the hook body 341 to disengage from the temperature sensor 12. Thus, the safety hook 34 is reset without damaging the temperature sensor 12, and the safety part 3 is reset, which facilitates subsequent inspection work.

[0044] The shell 1 includes a shell 11 and a limiting pin 14 disposed on the shell 11;

[0045] The temperature sensor 12 is connected to the housing 11.

[0046] The safety unit 3 includes a reset wrench 31 and an airflow regulating plate 32 connected to the reset wrench 31;

[0047] A drive shaft 13, which is inserted into the housing 11, is mounted on the air volume regulating plate 32, and the air volume regulating plate 32 has through holes;

[0048] The safety hook 34 is rotatably connected to the air volume regulating plate 32.

[0049] A drive coil spring 131 is provided between the drive shaft 13 and the housing 11. The drive shaft 13 is a hollow shaft. During installation, the drive shaft 13 is sleeved on the valve's transmission shaft on the valve body, and the housing is fixed to the valve body with four M5 screws.

[0050] Installation of reset wrench 31: The reset wrench 31 is fitted onto the valve drive shaft, the head of the wing screw 33 is inserted into the corresponding hole of the air volume regulating plate 32, and the two internal hex socket set screws pre-tightened on the reset wrench 31 are tightened onto the valve drive shaft.

[0051] Installation of temperature sensor 12: Screw the temperature sensor 12 (fuse) onto the corresponding screw hole on the housing 11.

[0052] Hold the reset wrench 31 and rotate it clockwise to hook the hook body 341 onto the shaft of the temperature sensor 12 (fuse).

[0053] The housing 11 is provided with a shaft fixing plate 132 sleeved on the drive shaft 13;

[0054] The reset wrench 31 is connected to the air volume adjustment plate 32 by a wing screw 33.

[0055] A connecting pin 343 is connected to the air volume regulating plate 32;

[0056] The hook plate 346 is sleeved on the connecting pin 343, and a safety coil spring 345 is provided between the connecting pin 343 and the hook plate 346. By designing the safety coil spring 345, a torque is generated between the hook plate 346 and the connecting pin 343, so that the hook body 341 can hook onto the temperature sensor 12. The temperature sensor 12 is provided with a fuse tube, and the fuse tube is provided with a shaft adapted to the hook body 341. When the fuse tube is detached, the shaft and the hook body 341 retract and disengage.

[0057] The connecting pin 343 can be used with a washer during installation;

[0058] The hook plate 346 is provided with a limiting body 342 that abuts against the air volume regulating plate 32. By designing the limiting body 342, the hook plate 346 has a certain stroke, preventing the hook plate 346 from exceeding the rotation stroke and affecting the operation.

[0059] The wrench 21 has a movement groove 22, which is adapted to the limiting pin 14; by setting the movement groove 22, the wrench 21 can swing along the temperature sensor 12.

[0060] The wrench 21 has an adapter groove 23 that is adapted to the temperature sensor 12. By designing the adapter groove 23, the wrench 21 can be fitted onto the temperature sensor 12.

[0061] A safety spring 4 is provided between the operating wrench 21 and the outer casing 11. By designing the safety spring 4, the operating wrench 21 is kept in a certain position when no external force is applied, thus preventing accidental activation.

[0062] When installing the wrench 21, it can be used with the retaining ring 5 to prevent the wrench 21 from becoming dislodged.

[0063] Working principle explanation:

[0064] Temperature sensor 12 operation: When the temperature of the medium flowing through the valve body reaches the limit value (generally set at 70℃), the fuse tube on the temperature sensor 12 disengages, causing the shaft hooked by the hook body 341 to retract. Under the torque of the drive coil spring 131, the drive shaft 13 and the air volume regulating plate 32 drive the reset wrench 31 connected to the valve drive shaft to rotate counterclockwise, thereby closing the valve.

[0065] Manual action: Pull the action wrench 21 to disengage the hook 341 from the shaft on the hooked temperature sensor. Under the torque of the drive coil spring 131, the drive shaft 13 and the air volume regulating plate 32 drive the reset wrench 31 connected to the valve drive shaft to rotate counterclockwise, thereby closing the valve.

[0066] When operated manually, by pulling the wrench, the wrench's reset body 24 abuts against the contact body 344 of the safety hook 34, causing the hook body 341 of the safety hook 34 to disengage from the temperature sensor 12.

[0067] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and all such equivalent transformations fall within the protection scope of the present invention.

Claims

1. A fire damper actuator, comprising: Shell (1), and a safety part (3) provided on the shell (1); The feature is that the shell part (1) is provided with a temperature sensor (12), and the safety part (3) is provided with a safety hook (34) adapted to the temperature sensor (12); the shell part (1) is also provided with a wrench part (2) that abuts against the safety hook (34) and drives the safety hook (34) to reset. The safety hook (34) includes a hook plate (346), a hook body (341) connected to the hook plate (346), and an abutment (344), wherein the hook body (341) is adapted to the temperature sensor (12); The wrench part (2) includes an actuating wrench (21) sleeved on the temperature sensor (12) and a resetting body (24) disposed on the actuating wrench (21) and abutting against the contact body (344).

2. A fire damper actuator according to claim 1, characterised in that: The shell (1) includes a shell (11) and a limiting pin (14) disposed on the shell (11). The temperature sensor (12) is connected to the housing (11).

3. A fire damper actuator according to claim 2, characterised in that: The safety unit (3) includes a reset wrench (31) and an airflow regulating plate (32) connected to the reset wrench (31). A drive shaft (13) is installed on the air volume regulating plate (32) and inserted into the housing (11). The safety hook (34) is rotatably connected to the air volume regulating plate (32).

4. A fire damper actuator according to claim 3, characterised in that: A connecting pin (343) is connected to the air volume regulating plate (32); The hook plate (346) is sleeved on the connecting pin (343), and a safety coil spring (345) is provided between the connecting pin (343) and the hook plate (346). The hook plate (346) is provided with a limiting body (342) that abuts against the air volume regulating plate (32).

5. A fire damper actuator according to claim 2, characterised in that: The wrench (21) has a movement groove (22) which is adapted to the limiting pin (14); The wrench (21) has an adapter slot (23) that is compatible with the temperature sensor (12).

6. A fire damper actuator according to claim 1, characterised in that: A safety spring (4) is provided between the operating wrench (21) and the outer casing (11).

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