Executing mechanism of smoke exhaust type fireproof valve

Abstract

The utility model relates to the technical field of smoke exhaust type fireproof valves, in particular to a smoke exhaust type fireproof valve executing mechanism which comprises a box body, rotating discs, a limiting circular groove and a limiting warping plate are arranged in the box body, the two rotating discs are fixedly arranged on two rotating shafts in a sleeved mode respectively, the limiting circular groove is formed in the rotating discs, and the limiting warping plate is arranged in the limiting circular groove. The two limiting warping plates are arranged in the box body; and the quick releasing mechanism is arranged in the box body and is used for quickly releasing the limiting of the driving shaft. When the temperature in the flue is low, the temperature sensing rod is subjected to high-temperature self-melting, under the elastic acting force of the first spring and the second spring, the first push rod moves upwards to be away from the left end of the limiting warping plate, and the second push rod moves downwards to abut against the right end of the limiting warping plate, so that the distance between the right end of the limiting warping plate and the limiting circular groove is increased; and the right end of the limiting warping plate is prevented from colliding with the limiting circular groove when the driving shaft is quickly reset.

Description

Technical Field

[0001] The utility model relates to the technical field of smoke exhaust type fire dampers, in particular to an actuator for a smoke exhaust type fire damper. Background Art

[0002] The smoke exhaust fire damper is a fire protection component, which is generally installed on the pipes of the mechanical smoke exhaust system. It is usually in an open state. When a fire occurs, the smoke exhaust is opened. When the smoke temperature in the smoke exhaust pipe reaches 280 degrees, it is closed and meets the smoke leakage and fire resistance integrity requirements within a certain period of time, playing a role in isolating smoke and preventing fire.

[0003] The existing smoke exhaust fire damper is provided with a temperature sensing rod inside. When the temperature sensing rod is at 280 degrees, it will self-melt and release the limit seesaw connected to the temperature sensing rod, so that one end of the limit seesaw leaves the driving component of the smoke exhaust fire damper. At the same time, the driving component uses the elastic force of the torsion spring to let the valve close the flue. However, the limit seesaw is in a horizontal state when released, which makes the distance between one end of the limit seesaw and the driving component close, and it is very easy for one end of the limit seesaw to collide with the driving component, resulting in the driving component unable to reset quickly. Utility Model Content

[0004] The utility model aims to solve the problem in the prior art that one end of a limit seesaw easily collides with a driving component, resulting in the driving component being unable to quickly reset, and proposes a smoke exhaust fire damper actuator.

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

[0006] A smoke exhaust fire damper actuator, comprising a box body, wherein the box body is provided with:

[0007] A driving shaft, a rotating shaft, a first bevel gear and a second bevel gear, wherein one driving shaft is installed in the box body to rotate in a vertical direction, and two rotating shafts are installed in the box body to rotate in a horizontal direction, one of the first bevel gears is key-connected to one driving shaft, and two of the second bevel gears are key-connected to two rotating shafts respectively, and both of the second bevel gears are meshed and connected with one of the first bevel gears;

[0008] A rotating disc, a limiting circular groove and a limiting seesaw, wherein the two rotating discs are respectively fixedly sleeved on the two rotating shafts, the limiting circular groove is opened on the rotating disc, the two limiting seesaws are both arranged in the box body, and one end of a limiting seesaw is movably against a limiting circular groove;

[0009] The quick release mechanism is arranged in the box body and is used for quickly releasing the limit of the driving shaft.

[0010] Preferably, a movable block is fixedly connected to the upper end of the driving shaft, and a rotating handle is movably provided on the movable block.

[0011] Preferably, the quick release mechanism comprises:

[0012] A rotating shaft and a first torsion spring, wherein the two rotating shafts are rotatably mounted in the box body, the two first torsion springs are respectively fixedly sleeved on the two rotating shafts, and the middle ends of the two limit seesaw plates are respectively fixedly connected to the two rotating shafts;

[0013] A first slide groove, a first spring and a first push rod, wherein the two first slide grooves are both provided in the box body, the two first springs are respectively welded in the two first slide grooves, and the two first push rods are respectively slidably sleeved in the two first slide grooves;

[0014] A second slide groove, a second spring and a second push rod, wherein the two second slide grooves are both provided in the box body, the two second springs are respectively welded in the two second slide grooves, and the two second push rods are respectively slidably sleeved in the two second slide grooves;

[0015] A clamping hole, a temperature sensing rod and a second torsion spring, wherein the two clamping holes are respectively opened at the side ends of the first push rod and the second push rod, the two ends of the temperature sensing rod are respectively sleeved on the two clamping holes, and the second torsion spring is fixedly sleeved on the driving shaft.

[0016] Preferably, the two first pushing rods are fixedly connected to the two first springs respectively, and the two second pushing rods are fixedly connected to the two second springs respectively.

[0017] Preferably, the first push rod abuts against one end of the limiting seesaw, so that the limiting seesaw abuts against the limiting circular groove, and the second push rod abuts against the other end of the limiting seesaw, so that the limiting seesaw is away from the limiting circular groove.

[0018] Preferably, a placement opening is provided on the box body, and the placement opening is used to place the temperature sensing rod.

[0019] Compared with the prior art, the utility model has the following advantages:

[0020] 1. When the temperature in the flue is 280 degrees, the temperature sensing rod melts by itself at high temperature. Under the elastic force of the first spring and the second spring, the first push rod moves upward away from the left end of the limit seesaw, and the second push rod moves downward to abut against the right end of the limit seesaw, so that the distance between the right end of the limit seesaw and the limit circular groove becomes larger, avoiding the right end of the limit seesaw and the limit circular groove from colliding when the drive shaft is quickly reset.

[0021] 2. When the right end of the limiting seesaw of the utility model abuts against the limiting circular groove, the two rotating shafts are in a limiting state, and the two second bevel gears are also in a limiting state. The two second bevel gears simultaneously limit both sides of the first bevel gear to improve the stability of the driving shaft in the limiting state. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural schematic diagram of a smoke exhaust fire damper actuator proposed by the utility model;

[0023] Figure 2 It is a right sectional schematic diagram of a smoke exhaust fire damper actuator proposed by the utility model;

[0024] Figure 3 For the utility model Figure 2 A magnified schematic diagram of part A;

[0025] Figure 4 The utility model is a schematic diagram of the rotating disc and the limit seesaw structure of a smoke exhaust fire damper actuator.

[0026] In the figure: 1, box body; 2, driving shaft; 3, first bevel gear; 4, second bevel gear; 5, rotating disk; 6, limit seesaw; 7, plate-moving protrusion; 8, rotating handle; 9, rotating shaft; 10, first torsion spring; 11, first slide groove; 12, first spring; 13, first push rod; 14, second slide groove; 15, second spring; 16, second push rod; 17, temperature sensing rod; 18, placement port; 19, second torsion spring; 20, rotating shaft. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0028] Reference Figure 1-Figure 4 , a smoke exhaust fire damper actuator, comprising a box body 1, a driving shaft 2, a rotating shaft 20, a first bevel gear 3 and a second bevel gear 4 are arranged in the box body 1, a driving shaft 2 is installed in the box body 1 in a vertical direction, when the box body 1 is installed, the lower end of the driving shaft 2 is connected to the flue valve, at this time the valve is in a state of closing the flue, two rotating shafts 20 are installed in the box body 1 in a horizontal direction, a first bevel gear 3 is keyed to a driving shaft 2, two second bevel gears 4 are keyed to two rotating shafts 20 respectively, and the two second bevel gears 4 are meshed with a first bevel gear 3, when the two second bevel gears 4 are both in a limited position, the two ends of the first bevel gear 3 are simultaneously limited, so as to improve the stability of the driving shaft 2 when it is limited;

[0029] Rotating disc 5, limiting circular groove and limiting seesaw 6, two rotating discs 5 are respectively fixedly sleeved on two rotating shafts 20, limiting circular groove is opened on the rotating disc 5, two limiting seesaws 6 are both arranged in the box body 1, and one end of a limiting seesaw 6 is movably against a limiting circular groove, so that the driving shaft 2 is in a limited state; quick release mechanism, the quick release mechanism is arranged in the box body 1, and it is used to quickly release the limit of the driving shaft 2. The upper end of the driving shaft 2 is fixedly connected with a plate moving protrusion 7, and a rotating handle 8 is movably arranged on the plate moving protrusion 7.

[0030] The quick release mechanism includes a rotating shaft 9 and a first torsion spring 10. The two rotating shafts 9 are both rotatably installed in the box body 1. The two first torsion springs 10 are respectively fixedly sleeved on the two rotating shafts 9, and the middle ends of the two limit rockers 6 are respectively fixedly connected to the two rotating shafts 9. When the limit rockers 6 are in a rotating state and lose external force, the elastic force of the first torsion spring 10 allows the limit rockers 6 to move to a horizontal state.

[0031] The quick release mechanism also includes a first slide groove 11, a first spring 12 and a first push rod 13. The two first slide grooves 11 are both opened in the box body 1. The two first springs 12 are respectively welded in the two first slide grooves 11. The two first push rods 13 are respectively slidably sleeved in the two first slide grooves 11. The two first push rods 13 are respectively fixedly connected to the two first springs 12. Figure 4 As shown, when the first push rod 13 is at the lower end of the first slide slot 11 and loses external force, the first push rod 13 moves upward under the elastic force of the first spring 12;

[0032] The quick release mechanism also includes a second slide groove 14, a second spring 15 and a second push rod 16. The two second slide grooves 14 are both opened in the box body 1. The two second springs 15 are respectively welded in the two second slide grooves 14. The two second push rods 16 are respectively slidably sleeved in the two second slide grooves 14. The two second push rods 16 are respectively fixedly connected to the two second springs 15. Figure 4 As shown, when the second push rod 16 is at the upper end of the second slide slot 14 and loses external force, the second push rod 16 moves downward under the elastic force of the second spring 15;

[0033] The quick release mechanism also includes a clamping hole, a temperature sensing rod 17 and a second torsion spring 19. The two clamping holes are respectively opened at the side ends of the first push rod 13 and the second push rod 16. Figure 4As shown, the two ends of the temperature sensing rod 17 are respectively sleeved on the two clamping holes to maintain the first push rod 13 at the lower end of the first slide groove 11 and the second push rod 16 at the upper end of the second slide groove 14. Since the second torsion spring 19 is fixedly sleeved on the drive shaft 2, after the drive shaft 2 is connected to the valve, the drive shaft 2 drives the valve to open the flue, and after the drive shaft 2 is released from the limit, the elastic force of the second torsion spring 19 is used to rotate the drive shaft 2 and the valve to close the flue.

[0034] The first push rod 13 abuts against one end of the limit seesaw 6, so that the limit seesaw 6 abuts against the limit circular groove, and the second push rod 16 abuts against the other end of the limit seesaw 6, so that the limit seesaw 6 is away from the limit circular groove to avoid the other end of the limit seesaw 6 from colliding with the limit circular groove. A placement opening 18 is provided on the box body 1, and the placement opening 18 is used to place the temperature sensing rod 17.

[0035] The functional principle of the utility model can be explained through the following operation modes:

[0036] First, the drive shaft 2 is connected to the valve in the flue, and the handle 8 is turned to drive the drive shaft 2 to drive the valve to open the flue. The drive shaft 2 exerts force on the second torsion spring 19, and at the same time pushes the first push rod 13 to move downward. Figure 4 As shown, the first push rod 13 is abutted against the left end of the limit seesaw 6, and the right end of the limit seesaw 6 is abutted against the limit circular groove, and then the two ends of the temperature sensing rod 17 are respectively placed in the two clamping holes to move the second push rod 16 upward;

[0037] Since the right end of the limiting seesaw 6 abuts against the limiting circular groove, the two rotating shafts 20 are in a limiting state, and the two second bevel gears 4 are also in a limiting state, so that the two second bevel gears 4 limit both sides of the first bevel gear 3 at the same time, so as to improve the stability of the driving shaft 2 in the limiting state;

[0038] When the temperature in the flue is 280 degrees, the temperature sensing rod 17 melts at high temperature, causing the first push rod 13 and the second push rod 16 to disconnect, and under the elastic force of the first spring 12 and the second spring 15, as shown in the attached figure. Figure 4 As shown, the first push rod 13 moves upward away from the left end of the limiting rocker 6, and the second push rod 16 moves downward and abuts against the right end of the limiting rocker 6, so that the right end of the limiting rocker 6 is away from the limiting circular groove, thereby releasing the limit of the drive shaft 2. At this time, under the elastic force of the second torsion spring 19, the drive shaft 2 rotates and drives the valve to close the flue.

[0039] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A smoke exhaust fire damper actuator, comprising a box body (1), characterized in that: The box body (1) is provided with: A driving shaft (2), a rotating shaft (20), a first bevel gear (3) and a second bevel gear (4), wherein one driving shaft (2) is mounted in a box body (1) for rotation in a vertical direction, two rotating shafts (20) are mounted in a box body (1) for rotation in a horizontal direction, one first bevel gear (3) is key-connected to one driving shaft (2), two second bevel gears (4) are key-connected to two rotating shafts (20) respectively, and both second bevel gears (4) are meshedly connected to one first bevel gear (3); A rotating disc (5), a limiting circular groove and a limiting seesaw (6), wherein the two rotating discs (5) are respectively fixedly sleeved on the two rotating shafts (20), the limiting circular groove is provided on the rotating disc (5), the two limiting seesaws (6) are both arranged in the box body (1), and one end of a limiting seesaw (6) is movably abutted against a limiting circular groove; A quick release mechanism is provided in the box body (1) and is used for quickly releasing the limit of the drive shaft (2).

2. A smoke exhaust fire damper actuator according to claim 1, characterized in that: The upper end of the driving shaft (2) is fixedly connected with a plate-moving protrusion (7), and a rotating handle (8) is movably provided on the plate-moving protrusion (7).

3. A smoke exhaust fire damper actuator according to claim 1, characterized in that: The quick release mechanism comprises: A rotating shaft (9) and a first torsion spring (10), wherein the two rotating shafts (9) are both rotatably mounted in the box body (1), the two first torsion springs (10) are respectively fixedly sleeved on the two rotating shafts (9), and the middle ends of the two limit seesaw plates (6) are respectively fixedly connected to the two rotating shafts (9); A first slide groove (11), a first spring (12) and a first push rod (13), wherein the two first slide grooves (11) are both provided in the box body (1), the two first springs (12) are respectively welded in the two first slide grooves (11), and the two first push rods (13) are respectively slidably sleeved in the two first slide grooves (11); A second slide groove (14), a second spring (15) and a second push rod (16), wherein the two second slide grooves (14) are both provided in the box body (1), the two second springs (15) are respectively welded in the two second slide grooves (14), and the two second push rods (16) are respectively slidably sleeved in the two second slide grooves (14); A clamping hole, a temperature sensing rod (17) and a second torsion spring (19), wherein the two clamping holes are respectively opened at the side end of the first push rod (13) and the side end of the second push rod (16), the two ends of the temperature sensing rod (17) are respectively sleeved on the two clamping holes, and the second torsion spring (19) is fixedly sleeved on the driving shaft (2).

4. A smoke exhaust fire damper actuator according to claim 3, characterized in that: The two first push rods (13) are respectively fixedly connected to the two first springs (12), and the two second push rods (16) are respectively fixedly connected to the two second springs (15).

5. The smoke exhaust fire damper actuator according to claim 3, characterized in that: The first push rod (13) abuts against one end of the limiting seesaw (6), so that the limiting seesaw (6) abuts against the limiting circular groove, and the second push rod (16) abuts against the other end of the limiting seesaw (6), so that the limiting seesaw (6) is away from the limiting circular groove.

6. A smoke exhaust fire damper actuator according to claim 3, characterized in that: The box body (1) is provided with a placement opening (18), and the placement opening (18) is used for placing the temperature sensing rod (17).

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