Simple fire damper actuator shell structure and fire damper actuator

Abstract

This utility model discloses a simplified fire damper actuator housing structure and a fire damper actuator, including an upper housing and a base. The upper housing and the base are detachably connected, forming a cavity between them to accommodate the internal mechanical structure. The upper housing includes a top wall, with a pair of oppositely arranged sides extending downwards to form side walls, and further extending outwards horizontally to form a connecting portion. This utility model improves the upper housing structure, avoiding the application of traditional stretching processes, allowing the upper housing to be formed by one-time stamping of sheet metal using a mold combined with bending. The improved structure not only simplifies the manufacturing process but also significantly reduces production costs, thereby enhancing the product's competitive advantage in the market.

Description

Technical Field

[0001] This utility model relates to the field of fire ventilation equipment technology, and in particular to a simple fire damper actuator housing structure and fire damper actuator. Background Technology

[0002] Fire damper actuators are mainly used to automatically or manually close ducts in ventilation, air conditioning, or smoke extraction systems during a fire, in order to prevent the spread of fire and toxic fumes along the ducts, thereby buying valuable time for personnel evacuation and fire rescue.

[0003] A typical fire damper actuator usually includes components such as a main shaft, adjusting vane, spring return mechanism, micro switch, temperature sensor, and terminal blocks. The main shaft is connected to the vane shaft of the fire damper, driving the vane shaft to rotate synchronously and control the opening and closing of the valve. The adjusting vane is fixedly connected to the main shaft. Under normal circumstances, the valve is in the normally open state, ensuring the normal operation of the ventilation system. At this time, the adjusting vane rotates against the spring force to engage with the temperature sensor, keeping the valve vane open. When the ambient temperature rises to the preset calibration value of the temperature sensor, the fusible alloy strip inside melts, triggering the temperature sensor. Subsequently, the spring return mechanism drives the adjusting vane, main shaft, and vane shaft to rotate, closing the fire damper. The micro switch is used to output the valve closed status signal, and the terminal blocks are used to connect the power supply line and signal feedback line.

[0004] The housing structure of the fire damper actuator is a key component protecting the internal mechanical and electrical parts, and is typically made of metal. This housing generally consists of an upper shell and a base: the upper shell is a tetrahedral box-shaped structure with an open bottom, usually manufactured using a stretching process, resulting in higher production costs; the main body of the base is rectangular, matching the opening of the upper shell, with a pair of opposite sides extending downwards to form sidewalls, and further extending horizontally outwards to form connecting parts. During assembly, the sidewalls of the upper shell are fastened to the outside of the sidewalls of the base, and the entire assembly is fixed by screws. In addition, the sidewalls of the upper shell have holes for installing wiring terminals, and a cover is added to the outside of the terminals. This cover is also a stretched component, resulting in higher manufacturing costs. The above structure can be referenced in a manual fire damper actuator disclosed in Chinese Patent Application No. 201922403976.4.

[0005] In today's increasingly competitive market, existing shell structures and enclosures, due to their complex processes and high material and processing costs, limit the potential for overall cost optimization. Therefore, there is an urgent need to effectively reduce the production costs of shell components while ensuring protective performance and reliability through structural innovation and improvements in manufacturing processes. Utility Model Content

[0006] The first technical problem this invention aims to solve is to propose a simplified fire damper actuator housing structure that can reduce production costs, in light of the aforementioned technical situation.

[0007] The second technical problem to be solved by this utility model is to propose a fire valve actuator with the above-mentioned shell structure in view of the current state of the technology.

[0008] The technical solution adopted by this utility model to solve the above-mentioned technical problem is as follows: a simple fire damper actuator housing structure, including an upper shell and a base, wherein the upper shell and the base are detachably connected, and a cavity for accommodating the internal mechanical structure is formed between the two, characterized in that:

[0009] The upper shell includes an upper shell top wall, a pair of oppositely arranged sides of the upper shell top wall extending downward to form upper shell side walls, and further extending outward horizontally to form an upper shell connecting portion.

[0010] As a base that cooperates with the upper shell, it can have a variety of structures. In order to further reduce costs, it is necessary to propose a base structure that is easy to manufacture. Preferably, the base includes a base bottom wall, and a pair of oppositely arranged sides of the base bottom wall extend upward to form base side walls.

[0011] When the upper shell and the base are installed, the side wall of the upper shell and the side wall of the base are staggered in the circumferential direction to jointly form the side circumferential wall of the accommodating cavity, and the upper end of the side wall of the base is in contact with the inner side of the top wall of the upper shell.

[0012] To make the upper shell and the base more secure, preferably, the other pair of opposite sides of the base extend upward to form a base connecting part;

[0013] When the upper shell is installed with the base, the side wall of the upper shell is located outside the base connection part, and the inner surface of the side wall of the upper shell is in contact with the outer surface of the base connection part.

[0014] The fastener passes through the side wall of the upper shell and the base connection part in sequence to fix the upper shell and the base.

[0015] To facilitate the installation of wiring terminals, preferably, one of the pair of base sidewalls has a mounting port that connects the receiving cavity to the outside. The mounting port is used to install wiring terminals. The side of the base bottom wall connected to the base sidewall extends outward horizontally to form a mounting and fixing part for fixing the wiring terminals.

[0016] Furthermore, the mounting and fixing part is provided with four mounting holes, which are spaced apart along the side where the mounting and fixing part connects to the bottom wall of the base, and the arrangement direction of each mounting hole is parallel to the edge of the side.

[0017] Preferably, it also includes a cover for enclosing the wiring terminals;

[0018] The housing includes a top wall, one side of which contacts the outer surface of the base side wall with the mounting hole, and the opposite side extends downward to form a cover surface, which has an opening for the wire hole of the wiring terminal to be exposed.

[0019] The other pair of opposite sides of the top wall of the cover extend downward to form the side wall of the cover, and further extend outward to form the cover connecting part, which is in contact with the outer surface of the side wall of the base.

[0020] The housing structure is easy to form in one piece through stamping and bending processes, and has good adaptability: when the number of terminal wire holes changes and the opening size of the housing needs to be adjusted, only the corresponding punch needs to be replaced to complete the stamping on the original mold, without the need to remake the entire set of molds, which significantly improves production efficiency and reduces manufacturing costs.

[0021] To further reduce costs, preferably, the upper shell, the base, and the cover are all sheet metal parts integrally formed from galvanized sheet metal. Conventional actuators typically use electroplated parts for their upper shell, base, and cover; using galvanized sheet metal eliminates the costs associated with re-electroplation and outsourced transportation.

[0022] As a solution to the second technical problem mentioned above: a fire damper actuator, characterized in that it uses a simplified fire damper actuator housing structure with any one of the above features.

[0023] Preferably, a micro switch is provided inside the accommodating cavity;

[0024] A wiring terminal is installed in the mounting opening on the side wall of the base, and the wiring terminal is electrically connected to the micro switch through a wire;

[0025] The accommodating cavity contains one or two microswitches, and the wiring terminals are correspondingly provided with three or five wire holes.

[0026] Preferably, a vertically extending main shaft is provided inside the accommodating cavity, and the main shaft extends upward through the upper shell;

[0027] The portion of the main shaft that extends out of the upper shell is fitted with an adjusting plate, and the main shaft and the adjusting plate are interference-fitted and riveted together.

[0028] Compared with existing technologies, the advantages of this invention lie in its innovative improvement of the upper shell structure. It optimizes the traditional tetrahedral box-like structure with an open bottom into a structure composed of an upper shell top wall, upper shell side walls extending downwards from a pair of opposite sides of the top wall, and an upper shell connecting portion extending horizontally outwards from the side walls. This structural design avoids the application of traditional stretching processes, allowing the upper shell to be formed by one-time stamping of sheet metal using a mold combined with bending. The improved structure not only simplifies the manufacturing process but also significantly reduces production costs, thereby enhancing the product's competitive advantage in the market. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0030] Figure 2 This is a schematic diagram of the structure of Embodiment 1 of the present invention with the upper shell and adjustment plate removed;

[0031] Figure 3 This is a schematic diagram of the upper shell blank and the upper shell structure of Embodiment 1 of this utility model, wherein (a) is the upper shell blank obtained after stamping, and (b) is the upper shell obtained after bending the upper shell blank;

[0032] Figure 4 This is a schematic diagram of the base blank and the base structure of Embodiment 1 of this utility model, wherein (a) is the base blank obtained after stamping, and (b) is the base obtained after bending the base blank;

[0033] Figure 5 This is a schematic diagram of the cover blank and the cover structure of Embodiment 1 of this utility model, wherein (a) is the cover blank obtained after stamping, and (b) is the cover obtained after bending the cover blank;

[0034] Figure 6 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0035] Figure 7 This is a schematic diagram of the structure of Embodiment 2 of the present invention with the upper shell and adjustment plate removed;

[0036] Figure 8 This is a schematic diagram of the cover blank and the cover structure of Embodiment 2 of the present invention, wherein (a) is the cover blank obtained after stamping, and (b) is the cover obtained after bending the cover blank;

[0037] Example 1: Upper shell-1, base-2, cover-3, terminal block-4, upper shell blank-1', upper shell top wall-11, upper shell side wall-12, upper shell connecting part-13, base blank-2', base bottom wall-21, base side wall-22, base connecting part-23, mounting port-24, mounting fixing part-25, mounting hole-26, micro switch-5, cover blank-3', cover top wall-31, cover surface-32, cover surface opening-33, cover side wall-34, cover connecting part-35, main shaft-6, adjusting plate-7, spring return mechanism-8, temperature sensor-9;

[0038] Example 2: Terminal block -4a, housing -3a, opening on the cover -33a. Detailed Implementation

[0039] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0040] Example 1

[0041] like Figures 1-5 The figure shown is a preferred embodiment of a simple fire damper actuator housing structure and a fire damper actuator according to the present invention.

[0042] The fire damper actuator in this embodiment is as follows: Figure 1 As shown, its outer shell structure includes an upper shell 1, a base 2, and a cover 3. The upper shell 1 and the base 2 are detachably connected, forming a cavity between them to accommodate the internal mechanical structure. The cover 3 is detachably connected to the outside of the base 2 and is used to cover the outside of the terminal block 4.

[0043] The upper shell 1, base 2, and cover 3 are all sheet metal parts integrally formed from galvanized sheet metal, formed by stamping the sheet metal in one piece using a mold and combining it with a bending process. The upper shell 1, base 2, and cover 3 of conventional actuators are usually electroplated parts. This embodiment improves upon them by using galvanized sheet metal, which can save costs such as re-electroplation and outsourced transportation.

[0044] The upper shell blank 1' obtained by stamping galvanized sheet with a die is shown below. Figure 3 As shown in (a), it is made into the shape shown by bending process. Figure 3 (b) shows the upper shell 1 of this embodiment. The upper shell 1 includes an upper shell top wall 11, a pair of oppositely arranged sides of which extend downward to form upper shell side walls 12, and further extend outward horizontally to form an upper shell connecting portion 13. A fastener passes through the upper shell connecting portion 13 and the target structure, such as a fireproof smoke exhaust valve, so that the fireproof valve actuator can be connected and fixed to the target structure.

[0045] The base 2 is assembled with the upper shell 1. The base blank 2' obtained by stamping the galvanized sheet with a mold is as follows: Figure 4 As shown in (a), it is made into the shape shown by bending process. Figure 4 (b) shows the base 2 of this embodiment. The base 2 includes a base bottom wall 21, and a pair of oppositely arranged sides of the base bottom wall 21 extend upward to form base side walls 22. When the upper shell 1 and the base 2 are installed, the upper shell side wall 12 and the base side wall 22 are staggered in the circumferential direction, together forming the side circumferential wall of the accommodating cavity, and the upper end of the base side wall 22 is in contact with the inner side of the upper shell top wall 11.

[0046] To make the upper shell 1 and the base 2 more securely fixed, the other pair of opposite sides of the base 2 extend upward to form base connecting parts 23, such as... Figure 1 and Figure 2 As shown, when the upper shell 1 and the base 2 are installed, the upper shell side wall 12 is located outside the base connecting part 23, the inner surface of the upper shell side wall 12 is in contact with the outer surface of the base connecting part 23, and the fastener passes through the upper shell side wall 12 and the base connecting part 23 in sequence to fix the upper shell 1 and the base 2 in a fixed connection.

[0047] like Figure 4 As shown in (b), one of the pair of base sidewalls 22 has a mounting port 24 that connects the receiving cavity to the outside. The mounting port 24 is used to install the terminal block 4. The side of the base bottom wall 21 connected to the base sidewall 22 extends outward horizontally to form a mounting and fixing part 25 for fixing the terminal block 4. The mounting and fixing part 25 has four mounting holes 26, which are spaced apart along the side of the mounting and fixing part 25 connected to the base bottom wall 21, and the arrangement direction of each mounting hole 26 is parallel to the edge of the side.

[0048] A microswitch 5 is installed inside the accommodating cavity to output the opening and closing status signal of the fireproof smoke exhaust valve. A terminal block 4 is installed in the mounting port 24 on the side wall 22 of the base, and the terminal block 4 is electrically connected to the microswitch 5 through a wire. The accommodating cavity has one microswitch 5, and the terminal block 4 has three corresponding wire holes. Two fixing members pass through the middle two of the four mounting holes 26 and the terminal block 4 respectively, which can fix the terminal block 4 to the mounting fixing part 25 of the base 2.

[0049] The housing 3 is installed over the terminal block 4 to provide protection. The housing blank 3' is obtained by stamping the galvanized sheet with a die. Figure 5 As shown in (a), it is made into the shape shown by bending process. Figure 5 (b) The housing 3 of this embodiment shown includes a housing top wall 31, one side of which contacts the outer surface of the base side wall 22, which is provided with mounting holes 26. Figure 1As shown, the opposite side extends downward to form a cover 32. The cover 32 has a cover opening 33 for the wire hole of the wiring terminal 4 to be exposed. The other pair of opposite sides of the top wall 31 of the cover extend downward to form a cover side wall 34, and further extend outward to form a cover connecting part 35. The cover connecting part 35 is in contact with the outer surface of the base side wall 22.

[0050] A vertically extending main shaft 6 is installed within the accommodating cavity. This main shaft 6 extends upwards through the upper housing 1, and an adjusting plate 7 is fitted onto the portion of the main shaft 6 extending through the upper housing 1. The main shaft 6 and the adjusting plate 7 are interference-fitted and riveted together. The main shaft 6 is connected to the blade shaft of the fire damper, driving the blade shaft to rotate synchronously, thus controlling the opening and closing of the valve. A spring return mechanism 8 is fitted outside the main shaft 6 to control the reset of the adjusting plate 7. Under normal circumstances, the valve is in the normally open state, ensuring the normal operation of the ventilation system. At this time, the adjusting plate 7 overcomes the spring force and rotates to engage with the temperature sensor 9, keeping the valve blade open. When the ambient temperature rises to the preset calibration value of the temperature sensor 9, the fusible alloy sheet inside melts, triggering the temperature sensor 9. Subsequently, the spring return mechanism 8 drives the adjusting plate 7, the main shaft 6, and the blade shaft to rotate, causing the fire damper to close.

[0051] Example 2

[0052] like Figures 6-8 The image shows another preferred embodiment of the present invention. The difference between this embodiment and Embodiment 1 is that a microswitch 5 is provided within the accommodating cavity, such as... Figure 6 As shown, the terminal 4a is provided with five wire holes, and four fasteners, such as bolts, pass through the four mounting holes 26 and the terminal 4a respectively, that is, the terminal 4a is fixed to the mounting and fixing part 25 of the base 2.

[0053] The housing 3a is installed over the terminal 4a to provide protection. The housing blank is obtained by stamping the galvanized sheet material with a die, as shown in the figure. Figure 8 As shown in (a), it is made into the shape shown by bending process. Figure 8 (b) The housing 3a of this embodiment shown has a housing opening 33a on its surface to expose the wire holes of the terminals 4a. This housing opening 33a is larger than that of Embodiment 1 because it covers more wire holes of the terminals 4a. The structure of the housing 3a is easy to integrally form through stamping and bending processes, and has good adaptability: when the number of wire holes of the terminals changes and the size of the housing opening 33a needs to be adjusted, as in this embodiment, only the corresponding punch needs to be replaced to complete the stamping on the original mold, without the need to remake the entire mold, which significantly improves production efficiency and reduces manufacturing costs.

Claims

1. A simple fire damper actuator housing structure, comprising an upper shell (1) and a base (2), wherein the upper shell (1) and the base (2) are detachably connected, forming a receiving cavity between them for accommodating an internal mechanical structure, characterized in that: The upper shell (1) includes an upper shell top wall (11), a pair of oppositely arranged sides of the upper shell top wall (11) extending downward to form upper shell side walls (12), and further extending outward horizontally to form an upper shell connecting portion (13).

2. The simple fire damper actuator housing structure according to claim 1, wherein The base (2) includes a base bottom wall (21), and a pair of oppositely arranged sides of the base bottom wall (21) extend upward to form base side walls (22); When the upper shell (1) and the base (2) are installed, the side wall (12) of the upper shell and the side wall (22) of the base are staggered in the circumferential direction to form the side wall of the accommodating cavity, and the upper end of the side wall (22) of the base is in contact with the inner side of the top wall (11) of the upper shell.

3. The simple fire damper actuator housing structure according to claim 2, wherein The other pair of oppositely arranged sides of the base (2) extend upward to form base connecting parts (23); When the upper shell (1) is installed with the base (2), the side wall (12) of the upper shell is located outside the base connecting part (23), and the inner surface of the side wall (12) of the upper shell is in contact with the outer surface of the base connecting part (23); The fastener passes through the upper shell sidewall (12) and the base connection part (23) in sequence to fix the upper shell (1) and the base (2) in a fixed connection.

4. The simple fire damper actuator housing structure according to claim 3, wherein One of the pair of base sidewalls (22) is provided with a mounting port (24) that connects the receiving cavity to the outside. The mounting port (24) is used to install the wiring terminal (4). The side of the base bottom wall (21) connected to the base sidewall (22) extends outward horizontally to form a mounting and fixing part (25) for fixing the wiring terminal (4).

5. The simplified fire damper actuator housing structure according to claim 4, characterized in that, The mounting and fixing part (25) has four mounting holes (26). The four mounting holes (26) are spaced apart along the side where the mounting and fixing part (25) connects to the bottom wall (21) of the base, and the arrangement direction of each mounting hole (26) is parallel to the edge of the side.

6. The simple fire damper actuator housing structure according to claim 5, wherein It also includes a housing (3) for covering the wiring terminal (4); The housing (3) includes a housing top wall (31), one side of which contacts the outer surface of the base side wall (22) provided with the mounting hole (26), and the opposite side extends downward to form a cover surface (32), which has a cover surface opening (33) for the wire hole of the wiring terminal (4) to be exposed. The other pair of opposite sides of the top wall (31) of the cover extend downward to form the side wall (34) of the cover, and further extend outward to form the cover connecting part (35), which is in contact with the outer surface of the side wall (22) of the base.

7. The simple fire damper actuator housing structure according to claim 6, wherein The upper shell (1), the base (2), and the cover (3) are all sheet metal parts integrally formed from galvanized steel sheets.

8. A fire damper actuator, characterized by The application has the housing structure of the simplified fire damper actuator as described in any one of claims 1 to 7.

9. A fire damper actuator according to claim 8, wherein, The cavity is equipped with a micro switch (5); A wiring terminal (4) is installed in the mounting port (24) of the side wall (22) of the base, and the wiring terminal (4) is electrically connected to the micro switch (5) through a wire; The accommodating cavity contains one or two microswitches (5), and the wiring terminal (4) is correspondingly provided with three or five wire holes.

10. The fire damper actuator of claim 8, wherein, The cavity is provided with a vertically extending main shaft (6), which extends upward through the upper shell (1); The portion of the main shaft (6) that extends out of the upper shell (1) is fitted with an adjusting plate (7), and the main shaft (6) and the adjusting plate (7) are interference-fitted and riveted together.

Images