Explosion-proof and fire-proof valve actuator

Abstract

The utility model discloses an anti-explosion and fireproof valve actuator and relates to the field of valve control devices. The fish-shaped chuck is used for replacing a ratchet wheel, the clamping column is used for replacing a pawl, the fish tail abuts against the limiting structure, the arc-shaped groove and the clamping hook are matched to lock the clamping column, and the accurate rotation angle is achieved; the fish back abuts against and pushes away from the clamping column, and the situation that the clamping hook locks the shifting fork unexpectedly is avoided; by means of clearance fit between the fish belly and the limiting structure, it is guaranteed that the fish tail protruding part does not affect rotation and combination is stable. The composite appearance of the fish-shaped chuck can achieve accurate positioning of the actuator main shaft, the fish back, the arc-shaped groove and smooth transition design, impact suddenness can be avoided, the contact area is increased, large torque transmission is adapted, and operation is stable. In addition, the design of the cast aluminum shell and the sealing ring can be adapted to explosion-proof occasions. The structure effectively solves the problems that a traditional actuator is prone to abrasion and complex in structure under large torque.

Description

Technical Field

[0001] The utility model relates to the field of valve control devices, in particular to an explosion-proof and fire-proof valve actuator. Background Art

[0002] In fire protection systems, fire damper actuators are key components controlling the damper's operation. Their torque performance and operational stability directly impact the damper's reliability. Larger fire dampers, those with numerous blades, or complex structures often require the actuator to provide higher torque to ensure reliable valve operation.

[0003] In the existing technology, the locking and transmission structure of the fire damper actuator has obvious defects: the fire damper actuator disclosed in CN222392111U adopts a ratchet and pawl matching structure and relies on tooth surface meshing transmission. Under high torque scenarios, the tooth surface contact stress surges, and wear problems such as pitting and plastic deformation are prone to occur, resulting in reduced operating accuracy and stability; the precise reset fire damper actuator disclosed in CN222823812U transmits torque through a motor and multi-stage speed gears. Although it can achieve high torque output, the gear combination structure is complex, the cost is high, and it is difficult to maintain.

[0004] In response to the above problems, the present invention proposes a high-torque fire damper actuator using a fish-shaped chuck to solve the reliability and structural complexity problems of traditional structures in high-torque scenarios. Utility Model Content

[0005] (1) Technical problems solved

[0006] In view of the deficiencies in the prior art, the present invention provides an explosion-proof fire damper actuator, which solves the problem that the traditional fire damper actuator is not suitable for transmitting large torque or has a complex structure.

[0007] (2) Technical solution

[0008] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0009] The explosion-proof and fire damper actuator includes: a main shaft, which can be rotatably arranged; a fish-shaped chuck, which is fixed to the main shaft and has a fish tail, a fish back, a fish belly, and an arc-shaped groove located between the fish back and the fish tail; a limiting structure, which abuts against the fish tail in an initial position; a first torsion spring, which connects the limiting structure and the fish-shaped chuck; a clamping column, when the main shaft overcomes the force of the first torsion spring and rotates in the first direction: the fish belly forms a clearance fit with the limiting structure, the fish back abuts against the clamping column, and the clamping column forms a self-locking when it enters the arc-shaped groove.

[0010] Preferably, the fish back is smoothly transitionally connected to the arc-shaped groove.

[0011] Preferably, it also includes: a base, on which the main shaft is arranged, and on which the limiting structure is fixed; a lever structure, the middle part of which is hinged to the base, and a hook is arranged at one end; a shift fork, one end of which is hinged to the base, the middle part of which is provided with the clamping column, and the free end of which can be locked by the hook; a tension spring, connecting the free end of the shift fork and the base, and its force causes the shift fork to approach the fish-shaped chuck; an electromagnet, the iron core of which is sleeved with a reset spring and the outer end of the iron core is connected to the other end of the lever structure; when the iron core is extended outward, the hook approaches the free end of the shift fork.

[0012] Preferably, it also includes: an outer shell, the base is detachably connected to its inner wall; a temperature sensor, arranged near the outer end of the iron core, including: an outer shell, threadedly connected to the bottom end of the outer shell; an inner core, the top end of which passes through the base, a temperature sensing piece, connecting the outer shell and the inner core; and a conical cap, arranged at the top end of the inner core.

[0013] Preferably, it also includes: an upper cover, connected to the upper end of the outer shell, provided with a second axial hole and a lower end convex ring; an optical axis, rotatably passed through the second axial hole of the upper cover; a wrench, connected to the upper end of the optical axis; a V-shaped pick, connected to the lower end of the optical axis; a column, provided near the end of the lever structure connected to the iron core, located between the two protruding ends of the V-shaped pick; a second torsion spring, sleeved on the column, connecting the inner ring surface of the convex ring and the V-shaped pick.

[0014] Preferably, it further comprises: a micro switch, which is arranged on the base; when the tail of the fish-shaped chuck abuts against the limiting structure, the shift fork abuts against the spring of the micro switch.

[0015] Preferably, the shell is connected to a junction box; the junction box, upper cover and shell are formed by cast aluminum die casting; the bottom end of the shell is provided with a seat hole for the main shaft to pass through, and the upper cover is provided with a first shaft hole for the main shaft to pass through upward; sealing rings are provided between the main shaft and the seat hole, and between the main shaft and the first shaft hole.

[0016] Preferably, the upper end of the main shaft is connected to a handle.

[0017] (3) Beneficial effects

[0018] The utility model provides an explosion-proof and fire-proof damper actuator. It has the following beneficial effects:

[0019] Adaptable to high-torque scenarios: The fish-shaped chuck's back and arc-shaped groove adopt a smooth transition design, and the contact with the chuck column is surface contact rather than tooth surface engagement. The large contact area and low contact stress can effectively reduce wear and maintain stable operation under high torque, solving the wear problem of traditional ratchet and pawl structures.

[0020] Simple and reliable structure: Locking and resetting are achieved through the cooperation of fish-shaped chuck, clamping column, clamping hook and torsion spring, without the need for complex gear transmission, which reduces structural complexity and the number of parts, thereby reducing costs and making maintenance more convenient.

[0021] Various unlocking modes: Supporting three modes: electromagnet power unlocking, temperature sensor trigger unlocking (the conical cap falls and hits the iron core at the critical temperature) and wrench manual unlocking, which can adapt to different emergency scenarios and improve the flexibility and reliability of the actuator.

[0022] Suitable for explosion-proof occasions: The housing, upper cover and junction box are made of die-cast aluminum, and a sealing ring is set between the main shaft and the shaft hole, which has good sealing and explosion-proof performance and can be used in places with explosion-proof requirements.

[0023] Precise positioning and resetting: Initial positioning is achieved through the contact between the fishtail and the limit structure. The restoring force of the first torsion spring can drive the main shaft to accurately reset to the initial position, ensuring the accuracy of the fire damper action. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic top view of the structure of the utility model;

[0025] Figure 2 This is a schematic diagram of the fishtail and the limiting structure in contact with each other in the present invention;

[0026] Figure 3 This is a schematic diagram of the locking state of the arc groove and the clamping column of the utility model;

[0027] Figure 4 This is a schematic diagram of the sealing structure of the main shaft, upper cover and outer shell of the utility model;

[0028] Figure 5 This is a schematic diagram of the connection between the V-shaped paddle and the column in the natural state of the wrench of the utility model;

[0029] Figure 6 This is a schematic diagram of the connection between the V-shaped paddle and the column when the wrench is manually pulled;

[0030] Figure 7 It is a side view schematic diagram of the temperature sensor of the present invention.

[0031] In the figure, 11-upper cover, 12-housing, 13-base, 14-junction box, 15-limiting structure, 16-convex ring, 17-seat hole, 18-first shaft hole, 19-second shaft hole, 2-fish-shaped chuck, 21-fish tail, 22-fish back, 23-fish belly, 24-arc groove, 3-spindle, 31-first torsion spring, 32-handle, 33-sealing ring, 4-shift fork, 41-clamping column, 42-tension spring, 5-electromagnet, 51-iron core, 52-reset spring, 6-lever structure, 61-hook, 62-column, 7-temperature sensor, 71-jacket, 72-inner core, 73-temperature sensing piece, 74-conical cap, 8-micro switch, 9-V-shaped pick, 91-optical axis, 92-second torsion spring, 93-wrench. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] In the description of the embodiments of the present invention, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0034] In the description of the embodiments of the present invention, it should be noted that the terms "upper", "lower", "inside" and "outside" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the embodiments of the present invention.

[0035] See also Figure 1 – Figure 3The embodiment of the utility model provides a technical solution: an explosion-proof and fire damper actuator, comprising: a main shaft 3, which can be rotatably arranged; a fish-shaped chuck 2, which is fixed on the main shaft 3 and has a fish tail 21, a fish back 22, a fish belly 23, and an arc-shaped groove 24 located between the fish back 22 and the fish tail 21; a limiting structure 15, which abuts against the fish tail 21 in its initial position; a first torsion spring 31, which connects the limiting structure 15 and the fish-shaped chuck 2; a clamping column 41, when the main shaft 3 overcomes the force of the first torsion spring 31 and rotates in the first direction: the fish belly 23 forms a clearance fit with the limiting structure 15, the fish back 22 abuts against the clamping column 41, and the clamping column 41 forms a self-locking when it enters the arc groove 24. It should be noted that: this actuator uses a fish-shaped chuck 2 instead of a ratchet, and a clamping column 41 instead of a pawl, and uses the fish tail 21 of the fish-shaped chuck 2 to abut against the limiting structure 15, and uses the arc groove 24 to lock the clamping column 41 to form a precise rotation angle; the fish back 22 abuts and pushes away the clamping column 41; through the clearance fit between the fish belly 23 and the limiting structure 15, the fish tail 21 forms a protrusion of the fish-shaped chuck 2, which will not affect the normal rotation of the fish-shaped chuck 2, and also ensures the stability of its combination with the limiting structure 15; through the composite shape of the fish-shaped chuck 2, the precise rotation positioning of the actuator main shaft 3 is met, and the fish back 22 and the arc groove 24 avoid the suddenness of the impact, increase its contact area with the clamping column 41, suitable for transmitting large torque, and stable and reliable operation.

[0036] See also Figure 2 In this embodiment, the fish back 22 is connected to the arc groove 24 in a smooth transition.

[0037] See also Figure 2 – Figure 3 In this embodiment, it also includes: a base 13, on which the main shaft 3 is arranged, and on which the limiting structure 15 is fixed; a lever structure 6, the middle part of which is hinged to the base 13, and a hook 61 is provided at one end; a shift fork 4, one end of which is hinged to the base 13, and the middle part of which is provided with the clamping column 41, and the free end of which can be locked by the hook 61; a tension spring 42, connecting the free end of the shift fork 4 and the base 13, and its force causes the shift fork 4 to approach the fish-shaped chuck 2; an electromagnet 5, whose iron core 51 is sleeved with a return spring 52 and the outer end of the iron core 51 is connected to the other end of the lever structure 6; when the iron core 51 extends outward, the hook 61 approaches the free end of the shift fork 4.

[0038] See also Figure 2 、 Figure 3 、 Figure 7In this embodiment, the thermocouple 7 further comprises: a housing 12, a base 13 detachably connected to the inner wall thereof; a temperature sensor 7, disposed near the outer end of the iron core 51, comprising: an outer sleeve 71 threadedly connected to the bottom end of the housing 12; an inner core 72, the top end of which passes through the base 13, a temperature sensing plate 73 connecting the outer sleeve 71 and the inner core 72; and a conical cap 74 disposed at the top end of the inner core 72. It should be noted that the operating principle of the thermocouple 7 is that at a critical temperature, the temperature sensing plate 73 deforms and breaks due to the high temperature, causing the inner core 72 of the thermocouple 7 to break away from the outer sleeve 71 and fall downward, driving the conical cap 74 located at the top of the thermocouple 7 to strike the outer end of the iron core 51, causing the iron core 51 to move toward the main body of the electromagnet 5, unlocking the hook 61, and then the main shaft 3 rotates in a second direction opposite to the first direction under the action of the torsion spring 31.

[0039] See also Figure 5 – Figure 6 In this embodiment, the present invention further includes: an upper cover 11, connected to the upper end of the housing 12, provided with a second axial hole 19 and a lower end convex ring 16; an optical axis 91, rotatably inserted into the second axial hole 19 of the upper cover 11; a wrench 93, connected to the upper end of the optical axis 91; a V-shaped pick 9, connected to the lower end of the optical axis 91; a column 62, provided near the end of the lever structure 6 connected to the iron core 51, and located between the two protruding ends of the V-shaped pick 9; a second torsion spring 92, sleeved on the column 62, connecting the inner ring surface of the convex ring 16 and the V-shaped pick 9. It should be noted that due to the force of the second torsion spring 92, one of the protruding ends of the V-shaped pick 9 contacts the column 62 (as shown in FIG. 1 ). Figure 5 As shown), at this time, the wrench 93 is pulled, and the V-shaped paddle 9 is rotated by the force of the second torsion spring 92, so that the other outward end of the V-shaped paddle 9 moves the column 62 (as shown in FIG. Figure 6 As shown), the end of the lever structure 6 connected to the iron core 51 can be moved toward the main body of the electromagnet 5, thereby unlocking the hook 61.

[0040] See also Figure 2 、 Figure 3 In this embodiment, the device further comprises a microswitch 8 mounted on the base 13. When the tail 21 of the fish-shaped chuck 2 abuts the limit structure 15, the shift fork 4 abuts the spring of the microswitch 8. It should be noted that the operating principle of the microswitch 8 is that when an external component (such as the shift fork 4) compresses the spring of the microswitch 8, the microswitch 8 switches its internal connection state, thereby transmitting an electrical signal indicating the open / close state of the fire damper connected to the actuator.

[0041] See also Figure 1 、 Figure 4In this embodiment, the housing 12 is connected to a junction box 14; the junction box 14, upper cover 11, and housing 12 are die-cast from cast aluminum; the bottom end of the housing 12 is provided with a seat hole 17 for the main shaft 3 to pass through, and the upper cover 11 is provided with a first axial hole 18 for the main shaft 3 to pass upward; sealing rings 33 are provided between the main shaft 3 and the seat hole 17, and between the main shaft 3 and the first axial hole 18. It should be noted that cast aluminum is not prone to generating sparks; the convex ring 16 provided at the lower end of the upper cover 11 cooperates with the upper port of the housing 12, and the sealing ring 33 prevents sparks generated by the movement of internal components from being transmitted to the outside, preventing external dust or combustible gases from entering the interior of the actuator, thereby achieving an explosion-proof effect. The actuator is suitable for use in places with explosion-proof requirements.

[0042] See also Figure 1 In this embodiment, the upper end of the main shaft 3 is connected to a handle 32.

[0043] The working principle and use process of this utility model: When in use, the state and process are as follows:

[0044] Initial state: the main shaft 3 is rotatably mounted on the base 13, the fish-shaped chuck 2 is fixed to the main shaft 3, and the fish tail 21 initially abuts against the limiting structure 15; one end of the first torsion spring 31 is clamped to the limiting structure 15, and the other end is connected to the fish-shaped chuck 2, and is in a pre-tightened state; the clamping column 41 maintains a contact trend with the fish-shaped chuck 2 under the action of the tension spring 42 and other forces; the hook 61 is in a state close to the driving component to which the clamping column 41 belongs (such as the free end of the fork 4).

[0045] Locking process (the main shaft 3 rotates in the first direction): When the external force drives the main shaft 3 to overcome the torsion of the first torsion spring 31 and rotate in the first direction, the fish-shaped chuck 2 rotates synchronously with the main shaft 3; the fish tail 21 rotates away from the limiting structure 15, and the fish belly 23 forms a clearance fit with the limiting structure 15 to avoid interference between the fish-shaped chuck 2 and the limiting structure 15 when rotating; the fish back 22 abuts against the clamping column 41, pushing the clamping column 41 to move synchronously with the driving component (such as the fork); when the clamping column 41 moves to abut the arc groove 24, the hook 61 forms a self-locking with the clamping column 41 or its driving component (such as the free end of the fork 4). At this time, the relative positions of the fish-shaped chuck 2 and the clamping column 41 are fixed, the main shaft 3 stops rotating, and the actuator is in a locked state (corresponding to the standby state of the fire damper).

[0046] Unlocking and resetting process (the main shaft 3 rotates in a second direction opposite to the first direction): When the unlocking condition is triggered (such as the electromagnet 5 is energized, the temperature sensor 7 is activated, or the wrench is manually operated), the hook 61 is unlocked (for example, when the electromagnet 5 is energized, the iron core 51 retracts to drive the lever structure 6 to rotate, so that the hook 61 moves away from the free end of the fork 4); under the action of the restoring force of the first torsion spring 31, the main shaft 3 rotates in a second direction opposite to the first direction, and the fish-shaped chuck 2 rotates synchronously; the arc groove 24 rotates with the fish-shaped chuck 2, squeezing the clamping column 41 out of the arc groove 24; the main shaft 3 continues to rotate until the fish tail 21 of the fish-shaped chuck 2 re-contacts the limiting structure 15, the main shaft 3 stops rotating, and the reset is completed (the corresponding fire damper returns to its initial state).

[0047] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended that all changes that fall within the meaning and range of equivalents of the claims are included in the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0048] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method 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 can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. Explosion-proof fire damper actuator, characterized by: include: A main shaft (3) is rotatably arranged; A fish-shaped chuck (2) is fixed on the main shaft (3) and has a fish tail (21), a fish back (22), a fish belly (23), and an arc-shaped groove (24) located between the fish back (22) and the fish tail (21); The limiting structure (15) is initially in contact with the fishtail (21); A first torsion spring (31) connects the limiting structure (15) and the fish-shaped chuck (2); The clamping column (41) is configured such that when the main shaft (3) rotates in the first direction against the force of the first torsion spring (31), the fish belly (23) forms a clearance fit with the limiting structure (15), the fish back (22) abuts against the clamping column (41), and the clamping column (41) forms a self-locking state when entering the arc groove (24).

2. The explosion-proof and fireproof damper actuator according to claim 1, characterized in that: The fish back (22) is smoothly transitionally connected to the arc groove (24).

3. The explosion-proof and fireproof damper actuator according to claim 1, characterized in that: Also includes: a base (13) on which the main shaft (3) is disposed and on which the limiting structure (15) is fixed; A lever structure (6) is hinged to the base (13) at its middle portion and has a hook (61) at one end; A shift fork (4), one end of which is hinged to the base (13), a clamping column (41) is provided in the middle, and a free end of which can be locked by a clamping hook (61); A tension spring (42) connects the free end of the shift fork (4) and the base (13), and its force causes the shift fork (4) to approach the fish-shaped chuck (2); An electromagnet (5), wherein an iron core (51) is sleeved with a return spring (52) and an outer end of the iron core (51) is connected to the other end of the lever structure (6); When the iron core (51) is extended outward, the hook (61) is close to the free end of the shift fork (4).

4. The explosion-proof and fireproof damper actuator according to claim 3, characterized in that: Also includes: The housing (12) and the base (13) are detachably connected to the inner wall thereof; The temperature sensor (7) is arranged near the outer end of the iron core (51) and includes: A jacket (71) is threadedly connected to the bottom end of the housing (12); The inner core (72) has its top end passing through the base (13), A temperature sensing piece (73) connecting the outer shell (71) and the inner core (72); A conical cap (74) is provided on the top end of the inner core (72).

5. The explosion-proof and fireproof damper actuator according to claim 4, characterized in that: Also includes: An upper cover (11) is connected to the upper end of the housing (12) and is provided with a second shaft hole (19) and a lower end convex ring (16); The optical axis (91) is rotatably inserted into the second axis hole (19) of the upper cover (11); A wrench (93) connected to the upper end of the optical shaft (91); A V-shaped paddle (9) connected to the lower end of the optical axis (91); A column (62) is provided near the end of the lever structure (6) connected to the iron core (51) and is located between the two outwardly extending ends of the V-shaped paddle (9); The second torsion spring (92) is sleeved on the column (62) and connects the inner ring surface of the convex ring (16) and the V-shaped paddle (9).

6. The explosion-proof and fireproof damper actuator according to claim 3, characterized in that: Also includes: A micro switch (8) is provided on the base (13); When the fish tail (21) of the fish-shaped chuck (2) abuts against the limiting structure (15), the shift fork (4) abuts against the spring of the micro switch (8).

7. The explosion-proof and fireproof damper actuator according to claim 4 or 5, characterized in that: The housing (12) is connected to a junction box (14); The junction box (14), upper cover (11), and housing (12) are formed by die-casting of cast aluminum; The bottom end of the housing (12) is provided with a seat hole (17) for the main shaft (3) to pass through, and the upper cover (11) is provided with a first shaft hole (18) for the main shaft (3) to pass through upward; A sealing ring (33) is provided between the main shaft (3) and the seat hole (17), and between the main shaft (3) and the first shaft hole (18).

8. The explosion-proof and fireproof damper actuator according to claim 7, characterized in that: The upper end of the main shaft (3) is connected to a handle (32).

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