Fireproof valve actuator for air pipe

Abstract

According to the fireproof valve actuator for the air pipe, the installation plate with the arc-shaped notch is arranged, the arc-shaped notch of the installation plate is connected with the circular air pipe in a matched mode, a support does not need to be additionally arranged between the installation plate of the fireproof valve actuator and the air pipe, the structure is simpler, time and labor are saved during installation, and accumulated errors are reduced; the temperature sensor is arranged, the fixing disc is matched with the conical head of the temperature sensor in a clamped mode, at the critical temperature, an inner pin of the temperature sensor drives the conical head to fall off, then the fixing disc drives the valve shaft to rotate, and automatic control over the fire damper actuator at the critical temperature is achieved; the main shaft is fixedly provided with the shifting piece, when the main shaft rotates, the shifting piece is driven to rotate synchronously, the abutting state of the shifting piece and the microswitch is changed, and therefore the microswitch transmits different electric signals, and the opening or closing state of the valve plate is recognized.

Description

Technical Field

[0001] The utility model relates to the field of actuators of air duct valve plates, in particular to a fire damper actuator for air ducts. Background Art

[0002] Air ducts are used for air transportation and are installed on buildings for ventilation. Air ducts are usually circular in shape. A valve plate can be installed in the air duct and closed by rotating the valve plate to prevent ventilation. Usually, the valve plate of the air duct is in a normally open state to facilitate building ventilation. In special circumstances, the valve plate needs to be closed to prevent ventilation. For example, when a fire occurs, ventilation will help the fire spread. At this time, the valve plate needs to be closed.

[0003] The fire damper actuator is an actuator acting on the fire damper to control the opening and closing of the fire damper. Corresponding to the valve plate of the air duct, it is used to control the opening or closing of the valve plate.

[0004] Authorized patent: CN212107077U discloses a fire damper actuator with a chuck, which can manually adjust the opening or closing angle of the valve plate connected to the handle by cooperating with the handle and the fixed disk. The mounting plate structure is disclosed. The mounting plate is a flat plate, which is suitable for installation on a flat base. If it is installed on a circular air duct, it is necessary to add a bracket to make the bracket adapt to the air duct. At the same time, the bracket needs to be provided with a mounting plane to adapt to the mounting plate. This makes the installation structure of the fire damper actuator complicated and bloated, and the installation is time-consuming and labor-intensive, and it is easy to cause the installation error to increase. The fixed disk structure is disclosed, but the structure of the fixed disk cooperating with the temperature sensor to automatically open or close the valve plate at a critical temperature is not disclosed. The transmission device for transmitting the signal of the open or closed state of the valve plate is not disclosed. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a fire damper actuator for air ducts, which solves the problem that the mounting plate of the valve plate actuator of the traditional air duct is not compatible with the circular air duct and a bracket needs to be installed; it solves the problem that the valve plate actuator of the traditional air duct is not equipped with a temperature sensor and cannot automatically control the opening or closing of the valve plate at a critical temperature; it solves the problem that the valve plate actuator of the traditional air duct cannot transmit an opening or closing signal status.

[0006] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] A fire damper actuator for an air duct is provided with a bottom plate, opposite side ends of the bottom plate are bent downward and extended to form a mounting plate, and two mounting plates are oppositely provided with arc-shaped notches.

[0008] Preferably, a shell is provided above the edge of the base plate, and a main shaft is rotatably provided at the upper end of the base plate, and a first torsion spring is connected to the lower part of the main shaft, and the main shaft passes through the upper end of the shell and protrudes from the upper end of the shell, and a fixing disk is fixedly connected to the upper end of the main shaft, and a bayonet is provided at the edge of the fixing disk; a mounting through hole is provided at the upper end of the shell, and a temperature sensor is passed through the mounting through hole, and the temperature sensor is provided with an outer sleeve and an inner pin, and the outer sleeve is detachably mounted on the mounting through hole of the shell, and a conical head is provided at the upper end of the inner pin, and a temperature sensing piece is connected between the lower end of the inner pin and the outer sleeve; a hole corresponding to the temperature sensor is provided on the base plate; the fixed disk overcomes the torsion of the first torsion spring and then rotates 90° to engage with the conical head of the temperature sensor.

[0009] Preferably, the inner pin is composed of a conical head, a spring and a lower pin body, the lower end of the conical head is connected to a spring, the lower end of the spring is connected to the lower pin body, and a temperature-sensing plate is connected between the lower end of the lower pin body and the outer sleeve; a folding ear is provided on the edge of the fixed disk, the folding ear is folded away from the bottom plate, the folding ear is adjacent to the bayonet, the fixed disk overcomes the torsion of the first torsion spring and then rotates 90° to engage with the conical head, and during the rotation process, the folding ear contacts the conical head before the bayonet.

[0010] Preferably, a turning handle is connected to the upper end of the fixed disk, a shaft sleeve is fixedly provided at the front end of the turning handle, a valve shaft is fixedly connected inside the shaft sleeve, a hole corresponding to the valve shaft is axially provided on the main shaft, and the valve shaft passes downward through the hole and protrudes below the main shaft.

[0011] Preferably, an A-shaped clamp is provided on the turning handle, and the A-shaped clamp consists of an upper clamp, a lower clamp, a pin connecting the upper clamp and the lower clamp, and a second torsion spring sleeved on the pin and respectively abutting against the upper clamp and the lower clamp; a shaft sleeve is fixedly provided on the end of the lower clamp close to the clamping opening; a column pin is fixedly connected to the lower end of the upper clamp, and the column pin is arranged between the shaft sleeve and the pin; a hole opposite to the column pin is arranged on the lower clamp, and a plurality of pin holes are evenly arranged on the fixed plate within a 90° arc range, and the column pin is matched with the pin hole.

[0012] Preferably, the main shaft extends downward and protrudes from below the base plate, a paddle is fixedly connected to the lower end of the main shaft, the paddle is bent upward and protrudes from above the base plate, an arc-shaped hole matching the paddle is provided on the base plate, and a micro switch is also provided on the upper end of the base plate; the fixed disk overcomes the torsion of the first torsion spring and rotates 90° to engage with the conical head of the temperature sensor, and during the rotation process, the paddle and the micro switch change from a non-abutment state to an abutment state.

[0013] The utility model provides a fire damper actuator for air ducts, which has the following beneficial effects:

[0014] By providing a mounting plate with an arc-shaped notch, the arc-shaped notch of the mounting plate is adapted to be connected with the circular air duct, and there is no need to install a bracket between the mounting plate of the fire damper actuator and the air duct. The structure is simpler, the installation is time-saving and labor-saving, and the cumulative installation error is reduced.

[0015] By setting a temperature sensor, the fixed disk and the conical head of the temperature sensor are snap-fitted together. At the critical temperature, the inner pin of the temperature sensor drives the conical head to fall off, and then the fixed disk drives the valve shaft to rotate, thereby realizing automatic control of the fire damper actuator at the critical temperature.

[0016] By fixing a paddle on the main shaft, when the main shaft rotates, the paddle is driven to rotate, changing the contact state between the paddle and the micro switch, so that different electrical signals are transmitted by the micro switch, thereby identifying the open or closed state of the valve plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0018] Figure 2 It is a partial cross-sectional view of the structure of the utility model from the main viewing angle;

[0019] Figure 3 It is a left side schematic diagram of the structure of the utility model;

[0020] Figure 4 It is a partial cross-sectional view of the structure of the utility model from the left side;

[0021] Figure 5 It is a top view schematic diagram of the structure of the utility model;

[0022] Figure 6 This is a partial cross-sectional view of the turning handle structure of the utility model;

[0023] Figure 7 This is a bottom view schematic diagram of the structure of the utility model;

[0024] Figure 8 This is a schematic diagram of the abutment state between the paddle and the micro switch of the utility model;

[0025] Fig. 9 This is a schematic diagram of the utility model in connection with the air duct and the valve plate.

[0026] In the figure, 1-base plate, 11-arc hole, 2-mounting plate, 21-arc notch, 3-housing, 31-mounting through hole, 4-spindle, 41-first torsion spring, 42-paddle, 5-fixed plate, 51-bayonet, 52-folding ear, 53-pin hole, 6-temperature sensor, 61-outer sleeve, 62-inner pin, 621-conical head, 622-spring, 623-lower pin body, 63-temperature sensing piece, 7-turn handle, 71-shaft sleeve, 72-A-shaped clip, 721-upper clamp, 722-lower clamp, 723-pin, 724-second torsion spring, 73-column pin, 8-valve shaft, 9-micro switch. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0029] In the description of the embodiments of the present invention, it should be noted that the terms "upper" and "lower" etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0030] See also Figure 3-Figure 4 , Fig. 9 The embodiment of the utility model provides a technical solution: a fire damper actuator for an air duct, provided with a bottom plate 1, the two opposite ends of the bottom plate 1 are bent downward to form a mounting plate 2, and the two mounting plates 2 are provided with arc-shaped notches 21 opposite to each other. It should be particularly noted that the arc-shaped notches 21 provided on the mounting plates 2 can adapt to circular air ducts, such as Fig. 9 As shown, the arc-shaped notch 21 of the mounting plate 2 can be welded to the air duct, and there is no need to set a bracket between the fire damper actuator and the air duct.

[0031] See also Figure 1-Figure 5In this embodiment, a shell 3 is provided above the edge of the bottom plate 1, a main shaft 4 is rotatably provided on the upper end of the bottom plate 1, a first torsion spring 41 is connected to the lower part of the main shaft 4, the main shaft 4 passes through the upper end of the shell 3 and protrudes from the upper part of the shell 3, a fixing plate 5 is fixedly connected to the upper end of the main shaft 4, and a bayonet 51 is provided on the edge of the fixing plate 5; a mounting through hole 31 is provided on the upper end of the shell 3, a temperature sensor 6 is passed through the mounting through hole 31, and the temperature sensor 6 is provided with an outer sleeve 61 and an inner pin 62, the outer sleeve 61 is detachably installed on the mounting through hole 31 of the shell 3, a conical head 621 is provided on the upper end of the inner pin 62, and a temperature sensing piece 63 is connected between the lower end of the inner pin 62 and the outer sleeve 61; a hole corresponding to the temperature sensor 6 is provided on the bottom plate 1; the fixing plate 5 overcomes the torsion of the first torsion spring 41 and rotates 90° to engage with the conical head 621 of the temperature sensor 6. It should be specially explained that: "penetrating" here refers to setting through a hole; the operating principle of the temperature sensor 6 is: the temperature sensing piece 63 is set as a temperature sensitive element such as a fusible alloy or a memory alloy, and at a critical temperature, the temperature sensing piece 63 melts or deforms, and then the inner pin 62 is separated from the outer sleeve 61; the fixed disk 5 overcomes the torsion of the first torsion spring 41 and rotates 90° to engage with the conical head 621 of the temperature sensor 6. When the temperature sensor 6 is at a critical temperature, the inner pin 62 is separated from the outer sleeve 61, the fixed disk 5 and the conical head 621 of the temperature sensor 6 end the engaging state, and rotate 90° under the torsion of the first torsion spring 41. The rotation action is associated with the valve plate, so that the valve plate can be rotated 90°, corresponding to the opening or closing of the valve plate.

[0032] See also Figure 1-Figure 5 In this embodiment, the inner pin 62 is composed of a conical head 621, a spring 622 and a lower pin body 623. The lower end of the conical head 621 is connected to the spring 622, and the lower end of the spring 622 is connected to the lower pin body 623. A temperature sensing piece 63 is connected between the lower end of the lower pin body 623 and the outer sleeve 61; the edge of the fixed disk 5 is provided with a folding ear 52, and the folding ear 52 is folded away from the bottom plate 1, and the folding ear 52 is adjacent to the bayonet 51. The fixed disk 5 overcomes the torsion of the first torsion spring 41 and rotates 90° to engage with the conical head 621, and during the rotation process, the folding ear 52 contacts the conical head 621 before the bayonet 51. It should be particularly noted that: adjacent, that is, arranged adjacently and in a connected state; since the conical head 621 is connected to the spring 622, when the fixed disk 5 rotates and the folded ear 52 contacts the conical head 621, the conical head 621 can be gradually pressed, so that the spring 622 is gradually compressed until it reaches the bayonet 51. The conical head 621 bounces up under the elastic force of the spring 622 and engages with the bayonet 51 of the fixed disk 5.

[0033] See also Figure 1-Figure 5In this embodiment, the upper end of the fixed disk 5 is connected to a turning handle 7, the front end of the turning handle 7 is fixedly provided with a shaft sleeve 71, the valve shaft 8 is fixedly connected inside the shaft sleeve 71, the main shaft 4 is axially provided with a hole corresponding to the valve shaft 8, and the valve shaft 8 passes through the hole downward and protrudes below the main shaft 4. It should be particularly noted that the turning handle 7 can manually adjust the opening or closing angle of the valve plate.

[0034] See also Figure 1-Figure 6 In this embodiment, an A-shaped clamp 72 is provided on the turning handle 7, and the A-shaped clamp 72 consists of an upper clamp plate 721, a lower clamp plate 722, a pin 723 connecting the upper clamp plate 721 and the lower clamp plate 722, and a second torsion spring 724 sleeved on the pin 723 and respectively abutting against the upper clamp plate 721 and the lower clamp plate 722. The end of the lower clamp plate 722 close to the clamping mouth is fixedly provided with a shaft sleeve 71, and the lower end of the upper clamp plate 721 is fixedly connected with a column pin 73, and the column pin 73 is arranged between the shaft sleeve 71 and the pin 723. The lower clamp plate 722 is provided with a hole opposite to the column pin 73, and a plurality of pin holes 53 are evenly arranged on the fixed plate 5 within a 90° arc range, and the column pin 73 is arranged in coordination with the pin hole 53. It should be specially explained that: the clamping mouth refers to the clamping part of the A-shaped clamp 72; by pressing the upper clamping plate 721 downward away from the clamping mouth end, the pin 73 on the upper clamping plate 721 can be lifted, and maintaining this state and rotating the handle 7 can drive the valve shaft 8 to rotate synchronously, align the pin 73 with a certain pin hole 53, release the pressure on the upper clamping plate 721, the pin 73 falls, and engages with the pin hole 53, and by engaging the pin 73 with different pin holes 53, the valve plate can be opened or closed at different angles.

[0035] See also Figure 7-Figure 8 In this embodiment, the main shaft 4 extends downward and protrudes below the base plate 1, and a paddle 42 is fixedly connected to the lower end of the main shaft 4. The paddle 42 is bent upward and protrudes above the base plate 1. An arc-shaped hole 11 adapted to the paddle 42 is provided on the base plate 1, and a micro switch 9 is also provided at the upper end of the base plate 1; the fixed disk 5 overcomes the torsion of the first torsion spring 41 and rotates 90° to engage with the conical head 621 of the temperature sensor 6, and during the rotation process, the paddle 42 and the micro switch 9 are changed from a non-contact state to an abutment state. It should be particularly noted that the working principle of the microswitch is that the microswitch is provided with a spring driven by an external force. When the spring is not compressed, it will naturally bounce outward. When the spring is compressed, it will move closer to the microswitch body, triggering the contact adjacent to the spring on the microswitch, and switching the connection state of the internal circuit through the triggering of the contact. In this embodiment, by switching the non-contact state and the abutment state of the paddle 42 and the spring of the microswitch 9, different electrical signals can be transmitted to the outside through the microswitch 9 to identify the open or closed state of the valve plate.

[0036] Working principle and use process of the utility model: when in use, the arc-shaped notch 21 of the mounting plate 2 of the fire damper actuator is adapted and connected to the air duct and welded, the fixing plate 5 is rotated 90° to overcome the torsion of the first torsion spring 41, so that the bayonet 51 of the fixing plate 5 is engaged with the conical head 621 of the temperature sensor 6. When the ambient temperature reaches the critical temperature, the temperature sensing piece 63 of the temperature sensor 6 melts or deforms, and then the inner pin 62 drives the conical head 621 to separate from the outer sleeve 61, and the fixing plate 5 is in the torsion of the first torsion spring 41. Under the action of force, it rotates 90°, driving the valve shaft 8 to rotate 90°, corresponding to the opening or closing of the valve plate; during the rotation of the main shaft 4, the paddle 42 fixed on the main shaft 4 rotates synchronously, and then is in abutment or non-abutment state with the microswitch 9, thereby, different electrical signals can be transmitted through the microswitch 9 to identify the opening or closing state of the valve plate; and by engaging the pin 73 of the turning handle 7 with different pin holes 53 on the fixed disk 5, the opening or closing angle of the valve plate can be manually controlled.

[0037] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0038] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A fire damper actuator for an air duct, characterized in that: A bottom plate (1) is provided, and opposite side ends of the bottom plate (1) are bent downward and extended to form a mounting plate (2), and two mounting plates (2) are oppositely provided with arc-shaped notches (21).

2. A fire damper actuator for air duct according to claim 1, characterized in that: A housing (3) is provided above the edge of the bottom plate (1); a main shaft (4) is rotatably provided at the upper end of the bottom plate (1); a first torsion spring (41) is connected to the lower part of the main shaft (4); the main shaft (4) passes through the upper end of the housing (3) and protrudes from the upper part of the housing (3); a fixing plate (5) is fixedly connected to the upper end of the main shaft (4); a bayonet (51) is provided at the edge of the fixing plate (5); a mounting through hole (31) is provided at the upper end of the housing (3); a temperature sensor (6) is inserted into the mounting through hole (31); The temperature sensor (6) is provided with an outer sleeve (61) and an inner pin (62); the outer sleeve (61) is detachably mounted on the mounting through hole (31) of the outer shell (3); the upper end of the inner pin (62) is provided with a conical head (621); a temperature sensing plate (63) is connected between the lower end of the inner pin (62) and the outer sleeve (61); a hole corresponding to the temperature sensor (6) is provided on the bottom plate (1); and the fixing plate (5) is rotated 90° to overcome the torsion of the first torsion spring (41) and then snap-fitted with the conical head (621) of the temperature sensor (6).

3. A fire damper actuator for air duct according to claim 2, characterized in that: The inner pin (62) is composed of a conical head (621), a spring (622) and a lower pin body (623); the lower end of the conical head (621) is connected to the spring (622); the lower end of the spring (622) is connected to the lower pin body (623); a temperature sensing plate (63) is connected between the lower end of the lower pin body (623) and the outer sleeve (61); a folding ear (52) is provided on the edge of the fixed plate (5); the folding ear (52) is folded away from the bottom plate (1); the folding ear (52) is adjacent to the bayonet (51); the fixed plate (5) overcomes the torsion of the first torsion spring (41) and then rotates 90 degrees to engage with the conical head (621); and during the rotation process, the folding ear (52) contacts the conical head (621) before the bayonet (51).

4. A fire damper actuator for an air duct according to any one of claims 2-3, characterized in that: The upper end of the fixed disk (5) is connected to a turning handle (7), the front end of the turning handle (7) is fixedly provided with a shaft sleeve (71), the shaft sleeve (71) is fixedly connected with a valve shaft (8), the main shaft (4) is axially provided with a hole corresponding to the valve shaft (8), and the valve shaft (8) passes downward through the hole and protrudes below the main shaft (4).

5. A fire damper actuator for air duct according to claim 4, characterized in that: The turning handle (7) is provided with an A-shaped clamp (72), and the A-shaped clamp (72) is composed of an upper clamp (721), a lower clamp (722), a pin (723) connecting the upper clamp (721) and the lower clamp (722), and a second torsion spring (724) sleeved on the pin (723) and respectively abutting against the upper clamp (721) and the lower clamp (722); an end of the lower clamp (722) close to the clamping opening is fixedly provided with a shaft sleeve (71); a lower end of the upper clamp (721) is fixedly connected with a column pin (73); the column pin (73) is arranged between the shaft sleeve (71) and the pin (723); a hole opposite to the column pin (73) is arranged on the lower clamp (722); a plurality of pin holes (53) are evenly arranged on the fixed plate (5) within a 90° arc range; the column pin (73) is arranged in coordination with the pin hole (53).

6. A fire damper actuator for an air duct according to any one of claims 2, 3 and 5, characterized in that: The main shaft (4) extends downward and protrudes below the bottom plate (1); a paddle (42) is fixedly connected to the lower end of the main shaft (4); the paddle (42) is bent upward and protrudes above the bottom plate (1); an arc-shaped hole (11) adapted to the paddle (42) is provided on the bottom plate (1); and a micro switch (9) is also provided at the upper end of the bottom plate (1); the fixed disk (5) rotates 90° to overcome the torsion of the first torsion spring (41) and then engages with the conical head (621) of the temperature sensor (6); and during the rotation process, the paddle (42) and the micro switch (9) change from a non-contact state to an abutment state.

Images