Fireproof valve actuator with temperature sensor convenient to replace

Abstract

A fireproof valve actuator with a temperature sensor convenient to replace relates to the field of fireproof valve actuating mechanisms and is provided with an upper cover, a cover hole is formed in the upper cover, a hole cap is arranged on the cover hole in a matched mode, and a plurality of clamping jaws are evenly arranged nearby the edge of the lower end of the hole cap in the circumferential direction and connected with the cover hole in a clamped mode. The temperature sensor penetrates through the cover hole and penetrates into the hole seat located on the base plate to complete installation, and convenience and rapidness are achieved; the direction pointer is fixedly arranged on the main shaft, after the main shaft rotates, the on-off state of the fireproof valve actuator can be visually judged according to the direction of the direction pointer, the upper cover does not need to be removed, and convenience and intuition are achieved.

Description

Technical Field

[0001] The utility model relates to the field of fire damper actuators, in particular to a fire damper actuator which is convenient for replacing a temperature sensor. Background Art

[0002] CN217898979U discloses a fire damper actuator, and specifically discloses a box body, in which components for executing actions are accommodated, and an upper cover is installed on the top of the box body. A hexagonal wrench embedded in the outer wall of the box body is disclosed, and the hexagonal wrench is used to cooperate with the main shaft shaft hole to rotate the main shaft. Some components accommodated in the box body are disclosed, including a pull rod for clamping a shift fork to limit the rotation of the main shaft. When the end of the pull rod connected to the electromagnet approaches the electromagnet, the shift fork rotates, and at the same time, the restriction of the shift fork on the rotation of the main shaft is released, and the main shaft rotates under the action of the torsion spring, and the fire damper connected to the main shaft performs an opening or closing action accordingly, but the temperature sensor is not disclosed.

[0003] CN221423995U discloses an easy-to-assemble fire smoke exhaust valve actuator, and specifically discloses a lever structure (equivalent to the pull rod in CN217898979U) for clamping the fork to limit the rotation of the main shaft. When the end of the lever structure connected to the electromagnet device approaches the electromagnet device, the fork rotates, and the restriction of the fork on the rotation of the main shaft is released. The main shaft rotates under the force of the torsion spring, and the fire damper valve body connected to the main shaft performs an opening or closing action accordingly. In particular, a temperature sensor is disclosed. The temperature sensor is used to sense high temperature. When a fire occurs, the temperature sensitive components such as fusible alloys on the temperature sensor are separated from the temperature sensor body at a critical temperature, so that the conical cap at the top of the temperature sensor falls and hits the lever structure, so that the end of the lever structure connected to the electromagnet device moves in the direction close to the electromagnet to perform the above-mentioned action. It is worth noting that the temperature sensor is of great significance for the automatic induction fire trigger action. For example, when a fire occurs, the temperature sensor is triggered, and the actuator drives the fire damper to close to avoid the spread of fire. After the temperature sensor is triggered, its function becomes ineffective. The actuator can be restored to its original function by replacing a new temperature sensor. However, since the temperature sensor is installed in the box, the upper cover needs to be removed for installation, and the upper cover and the box are usually connected with screws, so tools such as screwdrivers are also required. Since the fire damper actuator needs to be set up in conjunction with the fire damper, when the fire damper is in an unfavorable position, it will also cause trouble for replacing the temperature sensor. In addition, because the main shaft passes through the upper cover upward, when other components are connected to the upper end of the main shaft to hinder the removal of the upper cover, the relevant components need to be removed before the upper cover can be removed smoothly, such as the handle connected to the upper end of the main shaft. In order to tighten the handle and the main shaft, fastening components such as bolts are often required, which also increases the difficulty of installing the temperature sensor after removing the upper cover.

[0004] In addition, the opening and closing state of the actuator often requires experience-based judgment when visually observing without removing the upper cover, such as the direction of the handle. However, since the installation direction of the handle and the main shaft is not unique, this will cause trouble for judgment; removing the upper cover can intuitively see the connection status of the internal components and thus judge the opening and closing state of the actuator, but removing the upper cover still faces the aforementioned problem of complex operation. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a fire damper actuator that is convenient for replacing the temperature sensor, which solves the problem of requiring complex operations such as removing the upper cover when replacing the temperature sensor of the fire damper actuator; and solves the problem that the switch status cannot be visually obtained before and after the fire damper actuator executes an action.

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

[0007] A fire damper actuator for convenient replacement of a temperature sensor is provided with a chassis, the upper edge of the chassis is connected to a box, the upper end of the box is connected to an upper cover, an electromagnet is fixedly provided on the upper end of the chassis, the electromagnet is connected to the vicinity of one end of a lever structure, and the middle part of the lever structure is hinged to the upper end of the chassis, and a fork is clamped at the other end of the lever structure, the other end of the fork away from the lever structure is hinged to the upper end of the chassis, a pawl is hinged at the middle part of the fork, the pawl is arranged in cooperation with a ratchet wheel and limits the one-way rotation of the ratchet wheel, and the ratchet wheel is fixed It is arranged on the main shaft, the bottom of the main shaft is rotatably connected to the chassis, and the upper end of the main shaft passes through the upper cover, a micro switch is connected near the end where the fork is connected to the lever structure, the micro switch is fixedly arranged on the upper end of the chassis, and a hole seat is also arranged on the chassis, a temperature sensor is matched and connected in the hole seat, and the temperature sensor passes through the hole seat, the hole seat and the electromagnet are arranged on both sides of the lever structure, a conical cap is arranged on the upper end of the temperature sensor, a cover hole is arranged on the upper cover at a position opposite to the conical cap, and a hole cap is matched on the cover hole.

[0008] Preferably, a direction pointer is fixedly connected to the upper portion of the main shaft, and the direction pointer is arranged above the upper cover.

[0009] Preferably, the outer diameter of the hole cap is larger than the diameter of the cover hole, and a plurality of claws are evenly arranged circumferentially near the edge of the lower end of the hole cap, and the plurality of claws are engaged with the cover hole.

[0010] Preferably, a bypass hole is provided on the chassis, and the bypass hole is provided below the connection position between the micro switch and the shift fork.

[0011] Preferably, a hexagonal countersunk hole is provided in the middle of the upper end of the main shaft, and a hexagonal wrench matching with the hexagonal countersunk hole is embedded in the outer wall of the box body.

[0012] Preferably, a handle is fixedly connected to the upper end of the main shaft.

[0013] The utility model provides a fire damper actuator that is convenient for replacing a temperature sensor. It has the following beneficial effects:

[0014] By setting a cover hole and a hole cap on the upper cover, the hole cap is matched and set on the cover hole, and the cover hole is relatively set above the temperature sensor. When the temperature sensor needs to be replaced, you only need to remove the hole cap by hand and insert the temperature sensor to complete the installation, which is convenient and quick.

[0015] By fixing the direction pointer on the main shaft, the switch status of the fire damper actuator can be easily observed without removing the upper cover, which is convenient and intuitive. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the connection relationship between the hole cap and the cover hole of the utility model;

[0018] Figure 3 This is a top view of the structure of the utility model (without temperature sensor installed);

[0019] Figure 4 This is a top view of the structure of the utility model (temperature sensor has been installed);

[0020] Figure 5 This is a schematic diagram of the connection relationship between the temperature sensor and the chassis of the utility model;

[0021] Figure 6 This is a top view of the avoidance hole of the utility model;

[0022] Figure 7 It is a three-dimensional structural schematic diagram of the utility model when the handle structure is adopted.

[0023] In the figure, 1-chassis, 11-electromagnet, 12-lever structure, 13-fork, 14-pawl, 15-ratchet, 16-micro switch, 17-hole seat, 18-avoidance hole, 2-box, 3-upper cover, 31-cover hole, 4-spindle, 41-hexagonal countersunk hole, 42-hexagonal wrench, 43-handle, 5-temperature sensor, 51-conical cap, 6-hole cap, 61-claw, 7-direction pointer. DETAILED DESCRIPTION

[0024] 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.

[0025] 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.

[0026] In the description of the embodiments of the present invention, it should be noted that the terms "upper", "lower", "inside" and "outside" etc. indicating directions or positional relationships are 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.

[0027] See also Figure 1-5The embodiment of the utility model provides a technical solution: a fire damper actuator for convenient replacement of a temperature sensor, which is provided with a chassis 1, the upper edge of the chassis 1 is connected to a box body 2, the upper end of the box body 2 is connected to an upper cover 3, an electromagnet 11 is fixedly provided on the upper end of the chassis 1, the electromagnet 11 is connected to the vicinity of one end of a lever structure 12, and the middle part of the lever structure 12 is hinged to the upper end of the chassis 1, and a fork 13 is clamped at the other end of the lever structure 12, the other end of the fork 13 away from the lever structure 12 is hinged to the upper end of the chassis 1, a pawl 14 is hinged at the middle part of the fork 13, the pawl 14 is arranged in cooperation with a ratchet 15 and limits the one-way rotation of the ratchet 15, The ratchet 15 is fixedly arranged on the main shaft 4, the bottom of the main shaft 4 is rotatably connected to the chassis 1, and the upper end of the main shaft 4 passes through the upper cover 3, and a micro switch 16 is connected near the end where the fork 13 is connected to the lever structure 12, and the micro switch 16 is fixedly arranged on the upper end of the chassis 1, and a hole seat 17 is also arranged on the chassis 1, and a temperature sensor 5 is connected in the hole seat 17, and the temperature sensor 5 passes through the hole seat 17, and the hole seat 17 and the electromagnet 11 are arranged on both sides of the lever structure 12, and a conical cap 51 is arranged on the upper end of the temperature sensor 5, and a cover hole 31 is arranged on the upper cover 3 at a position opposite to the conical cap 51, and a hole cap 6 is arranged on the cover hole 31. It should be particularly noted that the working principle of the fire damper actuator is that the fire damper actuator engages the ratchet 15 through the pawl 14 on the fork 13, limiting the ratchet 15 from driving the main shaft 4 to rotate, and the lever structure 12 maintains the engaged state of the pawl 14 and the ratchet 15 by engaging with the fork 13, and by making the connecting part of the lever structure 12 and the electromagnet 11 approach the direction of the electromagnet 11, so that the lever structure 12 releases the engagement constraint on the fork 13, and at the same time, the hinge point of the fork 13 and the chassis 1 rotates away from the ratchet 15 under the action of the torsion spring, and the constraint of the pawl 14 on the ratchet 15 is released, and the ratchet 15 drives the main shaft 4 to rotate under the action of the torsion spring, and the fire damper connected to the main shaft 4 performs an opening or closing action; when the temperature sensor 5 is at a critical temperature, the inner core structure and the outer shell fall off, driving the conical cap 51 downward and hitting the lever structure 12, thereby triggering the aforementioned action.

[0028] See also Figure 1 , Figure 7 In this embodiment, a direction pointer 7 is fixedly connected to the upper part of the main shaft 4, and the direction pointer 7 is arranged above the upper cover 3. It should be particularly noted that the direction pointer 7 is fixedly connected to the main shaft 4 and can rotate with the main shaft 4. The switch state of the fire damper actuator can be intuitively judged by the direction of the direction pointer 7.

[0029] See also Figure 2 In this embodiment, the outer diameter of the hole cap 6 is larger than the diameter of the cover hole 31 , and a plurality of claws 61 are evenly arranged circumferentially near the lower end edge of the hole cap 6 , and the plurality of claws 61 are engaged with the cover hole 31 .

[0030] See also Figure 3 , Figure 6 In this embodiment, the chassis 1 is provided with an avoidance hole 18, and the avoidance hole 18 is provided below the connection position between the micro switch 16 and the fork 13. It should be particularly noted that the working principle of the micro switch 16 is that the fork 13 is abutted by the spring sheet extending from the outside thereof. When the fork 13 presses the spring sheet to make it approach the micro switch 16 itself, it will abut the state switching button on the micro switch 16, so that its internal circuit is switched to another connection state. By transmitting the connection state to the control end through the line, the switch state of the fire damper actuator can be known at the control end. Since the outer extension spring sheet of the micro switch 16 is often long, when the fork 13 presses the spring sheet to make it approach the micro switch 16 itself, the end of the spring sheet may abut the upper end of the chassis 1. The avoidance hole 18 can effectively avoid the occurrence of the situation where the end of the spring sheet abuts the chassis 1.

[0031] See also Figure 1 In this embodiment, a hexagonal countersunk hole 41 is provided in the middle of the upper end of the main shaft 4, and a hexagonal wrench 42 matching the hexagonal countersunk hole 41 is embedded in the outer wall of the box body 2.

[0032] See also Figure 7 In this embodiment, a handle 43 is fixedly connected to the upper end of the main shaft 4.

[0033] Working principle and use process of the utility model: A fire damper actuator that is convenient for replacing the temperature sensor. When in use, when the temperature sensor 5 is at a critical temperature and is triggered, its function has failed and needs to be replaced. At this time, there is no need to remove the upper cover 3. You only need to remove the hole cap 6 by hand, and insert the temperature sensor 5 through the cover hole 31, and insert it into the hole seat 17 of the chassis 1 to complete the installation. Then, cover the hole cap 6 on the cover hole 31, which is convenient and quick to operate. The switching action of the fire damper actuator is accompanied by the rotation of the main shaft 4, and the direction pointer 7 is fixedly connected to the main shaft 4, so the switching state of the fire damper actuator can be intuitively judged according to the direction of the direction pointer 7, and there is no need to remove the upper cover 3, which is convenient and intuitive.

[0034] 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.

[0035] 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 convenient replacement of a temperature sensor, comprising a chassis (1), the upper edge of the chassis (1) being connected to a box (2), the upper end of the box (2) being connected to an upper cover (3), an electromagnet (11) being fixedly arranged on the upper end of the chassis (1), the electromagnet (11) being connected to the vicinity of one end of a lever structure (12), the middle part of the lever structure (12) being hinged to the upper end of the chassis (1), and a shift fork (13) being clamped at the other end of the lever structure (12), the other end of the shift fork (13) being away from the lever structure (12) being hinged to the bottom The upper end of the plate (1), the middle part of the shift fork (13) is hinged with a pawl (14), the pawl (14) and the ratchet (15) are arranged in cooperation with each other and limit the unidirectional rotation of the ratchet (15), the ratchet (15) is fixedly arranged on the main shaft (4), the bottom of the main shaft (4) is rotatably connected to the chassis (1), and the upper end of the main shaft (4) passes through the upper cover (3), the end of the shift fork (13) connected to the lever structure (12) is connected with a micro switch (16), and the micro switch (16) is fixedly arranged on the upper end of the chassis (1), characterized in that: The chassis (1) is also provided with a hole seat (17), a temperature sensor (5) is connected in the hole seat (17), and the temperature sensor (5) passes through the hole seat (17), the hole seat (17) and the electromagnet (11) are respectively arranged on both sides of the lever structure (12), a conical cap (51) is provided on the upper end of the temperature sensor (5), a cover hole (31) is provided on the upper cover (3) at a position opposite to the conical cap (51), and a hole cap (6) is provided on the cover hole (31).

2. A fire damper actuator with convenient replacement of temperature sensor according to claim 1, characterized in that: A direction pointer (7) is fixedly connected to the upper portion of the main shaft (4), and the direction pointer (7) is arranged above the upper cover (3).

3. The fire damper actuator with convenient replacement of temperature sensor according to claim 1, characterized in that: The outer diameter of the hole cap (6) is greater than the diameter of the cover hole (31), and a plurality of claws (61) are evenly arranged in the circumferential direction near the lower end edge of the hole cap (6), and the plurality of claws (61) are engaged with the cover hole (31).

4. The fire damper actuator with convenient replacement of temperature sensor according to claim 1, characterized in that: The chassis (1) is provided with an avoidance hole (18), and the avoidance hole (18) is arranged below the connection position between the micro switch (16) and the shift fork (13).

5. A fire damper actuator for convenient replacement of temperature sensor according to any one of claims 1 to 4, characterized in that: A hexagonal countersunk hole (41) is provided in the middle of the upper end of the main shaft (4), and a hexagonal wrench (42) matching the hexagonal countersunk hole (41) is embedded in the outer wall of the box body (2).

6. A fire damper actuator for convenient replacement of temperature sensor according to any one of claims 1 to 4, characterized in that: A handle (43) is fixedly connected to the upper end of the main shaft (4).

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