Smoke exhaust valve actuator adopting Z-shaped lever

Abstract

A smoke exhaust valve actuator adopting a Z-shaped lever relates to the field of smoke exhaust valve actuating mechanisms and is provided with the Z-shaped lever, the position near the upper corner of the Z-shaped lever is rotatably connected to the upper end of a bottom support, a clamping groove is formed near the upper end point of the Z-shaped lever and connected with a shifting fork in a matched and clamped mode, and the position near the lower end point of the Z-shaped lever is connected with the outer end of an iron core of an electromagnet. A hand-pulling swing rod is connected near the lower corner of the Z-shaped lever; by arranging the Z-shaped lever, the length of the force arm of the driving end has the size in the length direction and the size in the width direction at the same time, the length of the force arm of the driving end is the length of the bevel edge of a right triangle formed by taking the length size and the width size as the two right-angle edges, and the driving end is prolonged while the force arm of the driving end is prolonged. And the space in the smoke exhaust valve actuator can be effectively utilized, obvious change of the appearance size of the smoke exhaust valve actuator cannot be caused, the layout is reasonable, and the requirements for increasing the locking force and reducing the unlocking force can be met at the same time.

Description

Technical Field

[0001] The utility model relates to the field of smoke exhaust valve actuators, in particular to a smoke exhaust valve actuator using a Z-shaped lever. Background Art

[0002] CN211738180U discloses a novel smoke exhaust valve actuator, specifically discloses a main shaft, a reel and a ratchet are fixed on the main shaft, a pawl is arranged on the fork, and the ratchet is used to limit the counterclockwise rotation of the main shaft, and one end of the lock rod (or lever structure) (also called the locking end) locks one end of the fork, and the counterclockwise rotation of the main shaft is limited. An electromagnet is provided. When the electromagnet is energized, the adsorption connecting rod (also called the iron core) drives the other end of the lever (also called the driving end) to rotate, and the locking state of the fork is released, and then the pawl is separated from the ratchet, and the restriction on the rotation of the main shaft is released. The wire rope wound on the reel drives the main shaft to rotate under the action of external force. The external force comes from the valve restoring force of the smoke exhaust valve, corresponding to the opening or closing action of the valve, or through manual operation, that is, manually operating the lever structure with a hand pull rod, which can also play the same effect as the electromagnet energization. Here, the electromagnet adsorption force or the manual operation force can be collectively referred to as the unlocking force. This is the working principle of the smoke exhaust valve actuator controlling the switch of the smoke exhaust valve.

[0003] It is worth noting that when the spindle is in a passive locking state, the locking end of the lever structure is usually required to have sufficient locking force, while the unlocking force at the driving end of the lever structure is required to easily meet the requirements. Properly increasing the locking force at the locking end of the lever structure can improve the stability and reliability of the system; and properly reducing the critical unlocking force at the driving end of the lever structure can make the adsorption function of the electromagnet more reliable and make manual operation easier. However, for the same lever structure, when the locking force at its locking end increases, the unlocking force at its driving end will also increase synchronously. Usually, you can try to solve the above contradiction from the following angles.

[0004] First, while the locking force of the lever structure is increased, configuring an electromagnet with greater adsorption force can partially meet the requirements, but manual operation will become more laborious, and configuring an electromagnet with greater adsorption force also means an increase in cost.

[0005] Secondly, try to reduce the length of the lever arm at the locking end of the lever structure and increase the length of the lever arm at the driving end of the lever structure. However, when the lever arm at the locking end of the lever structure is shortened, when this end is disengaged from the fork, the lever structure needs to rotate at a larger angle. The shorter the lever arm at the locking end, the larger the swing amplitude of the driving end. The increase in the swing amplitude of the driving end requires a larger activity space, which in turn affects the spatial layout of other components. Therefore, in the case of shortening the length of the lever arm at the locking end to a certain extent, the main consideration is to appropriately increase the length of the lever arm at the driving end. The increase in the length of the lever arm at the driving end can meet the above requirements at the same time. Then, its spatial dimensions often become larger. This mainly refers to the increase in the length direction of the lever structure, which causes the length of the supporting components such as the base, shell, and upper cover to increase, the volume to increase, the weight to increase, and the manufacturing and transportation costs to increase. The longer lever structure will also cause the internal space of the smoke exhaust valve to not be effectively utilized, and the improvement plan is not satisfactory. Utility Model Content

[0006] In view of the deficiencies in the prior art, the utility model provides a smoke exhaust valve actuator using a Z-shaped lever, which solves the problem that the existing smoke exhaust valve actuator cannot complete a reasonable layout, while meeting the needs of increasing the locking force and reducing the unlocking force.

[0007] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A smoke exhaust valve actuator using a Z-shaped lever is provided with a base, a main shaft, a shift fork, and an electromagnet; a Z-shaped lever is also provided, the Z-shaped lever is in a "Z" shape, the Z-shaped lever is rotatably connected to the upper end of the base near the upper corner, a slot is provided near the upper end point of the Z-shaped lever, the slot is adapted to be snap-connected with the end of the shift fork, the lower end point of the Z-shaped lever is connected to the electromagnet, and a hand-pull swing rod is connected near the lower corner of the Z-shaped lever.

[0009] Preferably, a main shaft is rotatably provided on the upper end of the base, a ratchet and a drum are fixedly provided on the main shaft, and a wire rope is wound on the drum; a shell is provided, and a guide sleeve is provided on the shell, and the wire rope passes through the guide sleeve to the outside; one end of the shift fork is rotatably provided on the base, and a tension spring is connected near the other end of the shift fork, and the force of the tension spring makes the shift fork move away from the ratchet, and a pawl cooperating with the ratchet is provided on the shift fork; the shift fork is connected to a reset rod; an iron core is provided on the electromagnet; a wiring terminal is provided, and the inner end of the wiring terminal is electrically connected to the electromagnet; the card slot is adapted to be clamped with the end of the shift fork close to the tension spring, and the lower end of the Z-shaped lever is connected to the outer end of the iron core, and a spring is sleeved on the iron core.

[0010] Preferably, a long hole is provided near the lower end point of the Z-shaped lever, and the outer end of the iron core is movably connected to the long hole; a square wide hole is provided near the lower corner of the Z-shaped lever, and the inner side of the square wide hole is connected to a hand-pull swing rod.

[0011] Preferably, a micro switch is provided, the shift fork is connected to a pressure plate, the pressure plate abuts against the micro switch; and the inner end of the wiring terminal is electrically connected to the micro switch.

[0012] Preferably, a fork limiter is provided between the fork and the fixed end of the tension spring, a reset rod is provided between the fork and the fork limiter, the reset rod is provided with a reset shaft and a reset paddle, the reset shaft is rotatably provided at the upper end of the base, a reset paddle is fixedly provided on the reset shaft, and the reset paddle is connected to the fork.

[0013] The utility model provides a smoke exhaust valve actuator using a Z-shaped lever, which has the following beneficial effects:

[0014] By setting a Z-shaped lever, the length of the force arm at the driving end has dimensions in both length and width directions, so that the length of the force arm at the driving end is the length of the hypotenuse of a right-angled triangle constructed with the length and width dimensions as two right-angled sides. While extending the force arm at the driving end, the space inside the smoke exhaust valve actuator can also be effectively utilized without causing a significant change in its external dimensions. The layout is reasonable and can simultaneously meet the needs of increasing the locking force and reducing the unlocking force. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic top view of the structure of the utility model in a waiting execution state;

[0016] Figure 2 It is a schematic top view of the structure after the utility model is executed.

[0017] In the figure, 11-base, 12-housing, 13-guide sleeve, 2-main shaft, 21-ratchet, 22-drum, 23-wire rope, 3-shift fork, 31-tension spring, 32-pawl, 33-pressure plate, 34-shift fork limit, 4-reset rod, 41-reset shaft, 42-reset paddle, 51-connecting terminal, 52-electromagnet, 521-iron core, 522-spring, 53-micro switch, 6-Z-shaped lever, 61-card slot, 62-long hole, 63-square wide hole, 7-hand-pull swing rod. DETAILED DESCRIPTION

[0018] 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.

[0019] 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.

[0020] 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.

[0021] In the description of the embodiments of the present invention, the descriptions of clockwise and counterclockwise in the rotation direction, unless otherwise specified, are based on the rotation direction when viewed from a top perspective.

[0022] See also Figure 1-Figure 2 The embodiment of the utility model provides a technical solution: a smoke exhaust valve actuator using a Z-shaped lever, which is provided with a base 11, a main shaft 2, a fork 3, and an electromagnet 52; a Z-shaped lever 6 is also provided, and the Z-shaped lever 6 is in a "Z" shape. The upper corner of the Z-shaped lever 6 is rotatably connected to the upper end of the base 11, and a slot 61 is provided near the upper end point of the Z-shaped lever 6. The slot 61 is adapted to be snap-connected with the end of the fork 3, and the lower end point of the Z-shaped lever 6 is connected to the electromagnet 52, and a hand-pull swing rod 7 is connected near the lower corner of the Z-shaped lever 6. It should be particularly noted that the setting of the Z-shaped lever 6 does not extend the straight-line length of the force arm at the driving end, but increases the length in the "width" direction, so that the length of the force arm at the driving end is the length of the hypotenuse of the right triangle constructed with the length and width dimensions as the two right-angled sides. Therefore, while increasing the effective length of the force arm at the driving end, the internal space of the actuator can also be effectively utilized without causing a significant change in the size of the actuator; the upper end point, lower end point, upper corner and lower corner of the Z-shaped lever 6 correspond to the upper end point, lower end point, upper corner and lower corner of the "Z" shape.

[0023] See also Figure 1-Figure 2 In this embodiment, the upper end of the base 11 is rotatably provided with a main shaft 2, and the main shaft 2 is fixedly provided with a ratchet 21 and a drum 22, and a wire rope 23 is wound on the drum 22; a housing 12 is provided, and a guide sleeve 13 is provided on the housing 12, and the wire rope 23 passes through the guide sleeve 13 to the outside; one end of the fork 3 is rotatably provided on the base 11, and a tension spring 31 is connected near the other end of the fork 3, and the tension spring 31 acts to make The shift fork 3 is away from the ratchet 21, and the shift fork 3 is provided with a pawl 32 that cooperates with the ratchet 21; the shift fork 3 is connected to the reset rod 4; the electromagnet 52 is provided with an iron core 521; a terminal 51 is provided, and the inner end of the terminal 51 is electrically connected to the electromagnet 52; the slot 61 is adapted to be snapped with the end of the shift fork 3 near the tension spring 31, and the lower end of the Z-shaped lever 6 is connected to the outer end of the iron core 521, and a spring 522 is sleeved on the iron core 521. It should be specially noted that: this actuator has two working states, the waiting execution state and the post-execution state, such as Figure 1 As shown, this is the waiting execution state. At this time, part of the wire rope 23 is wound in the drum 22, and the wire rope 23 is in a tensioned state. According to the matching characteristics of the ratchet and the pawl, in this embodiment, when the ratchet 21 and the pawl 32 are in a meshing state, the ratchet 21 can rotate clockwise but cannot rotate counterclockwise. Therefore, when the valve of the smoke exhaust valve associated with the actuator is connected to the outer end of the wire rope 23, the main shaft 2 can be controlled to rotate clockwise to make the wire rope 23 enter a tensioned state; at this time, through When the electromagnet 52 is energized or the hand-pull swing rod 7 is manually operated, the Z-shaped lever 6 can be swung counterclockwise to release the clamping constraint on the fork 3. The fork 3 is away from the ratchet 21 under the tension of the tension spring 31, and the ratchet 32 ​​releases the constraint on the ratchet 21. Under the restoring force of the smoke exhaust valve connected to the outer end of the wire rope 23, the reel 22 is driven to rotate through the wire rope 23, and the wire rope 23 wound in the reel 22 is released outward. At this time, the actuator enters the post-execution state, such as Figure 2 As shown, in this state, the Z-shaped lever 6 and the fork 3 can be restored to the engaged state through the reset rod 4. At this time, the main shaft 2 is rotated clockwise, the wire rope 23 is wound onto the drum 22, and the state of waiting for execution is restored; the terminal 51 is used to connect the conductors at the inner and outer ends, the inner end is connected to the electromagnet 52, etc., and the outer end is connected to the power supply, input / output signal line, etc.

[0024] See also Figure 1-Figure 2In this embodiment, a long hole 62 is provided near the lower end of the Z-shaped lever 6, and the outer end of the iron core 521 is movably connected to the long hole 62; a square wide hole 63 is provided near the lower corner of the Z-shaped lever 6, and the inner side of the square wide hole 63 is connected to the hand-pull swing rod 7. It should be particularly noted that: during the rotation of the Z-shaped lever 6, the end of the iron core 521 connected to the electromagnet 52 will be deflected to a certain extent. The long hole 62 is provided, and the outer end of the iron core 521 can slide in the long hole 62, which can avoid the deflection of the iron core 521 caused by the deflection of the Z-shaped lever 6, and can protect the electromagnet 52; the hand-pull swing rod 7, the lower end of which is fixed, can drive the Z-shaped lever 6 to rotate through the swing of the upper end; the reason for providing the square wide hole 63: because the rotating shaft is provided near the upper corner of the Z-shaped lever 6, and the square wide hole 63 is provided near the lower corner, the hand-pull swing rod 7 has a usable force arm in both length and width directions, such as Figure 1 As shown, the upper end of the hand-pull swing rod 7 can swing to the right or upward. Since the Z-shaped lever 6 has a certain length of force arm relative to the rotating shaft in both directions, it can easily release the Z-shaped lever 6 and the fork 3 from the clamping constraint state by leaning against the right or upward edge of the square wide hole 63. At the same time, the setting of the "wide hole" prevents the Z-shaped lever from touching the hand-pull swing rod 7 during the rotation process.

[0025] See also Figure 1-Figure 2 In this embodiment, a micro switch 53 is provided, the shift fork 3 is connected to a pressing plate 33, the pressing plate 33 abuts against the micro switch 53; the inner end of the wiring terminal 51 is electrically connected to the micro switch 53. It should be particularly noted that the working process of the micro switch 53 is as follows: when the shift fork 3 drives the pawl 32 to engage with the ratchet 21, it also drives the pressing plate 33 to abut against the spring of the micro switch 53, so that the micro switch 53 switches the internal circuit, and transmits a feedback signal that the actuator enters the waiting execution state to the outside through the wiring terminal 51 connected thereto.

[0026] See also Figure 1-Figure 2 In this embodiment, a shift fork limiter 34 is provided between the shift fork 3 and the fixed end of the tension spring 31, and a reset rod 4 is provided between the shift fork 3 and the shift fork limiter 34. The reset rod 4 is provided with a reset shaft 41 and a reset paddle 42. The reset shaft 41 is rotatably provided at the upper end of the base 11, and a reset paddle 42 is fixedly provided on the reset shaft 41, and the reset paddle 42 is connected to the shift fork 3. It should be particularly noted that the shift fork limiter 34 is provided between the shift fork 3 and the fixed end of the tension spring 31, so that when the tension spring 31 pulls the shift fork 3 closer, the shift fork 3 abuts against the shift fork limiter 34, so as to avoid excessive rotation of the shift fork 3 and collision with other components, such as Figure 2As shown, in fact, since the reset rod 4 is arranged between the fork 3 and the fork limit 34, the fork limit 34 may also limit the rotation of the reset rod 4, and its positive significance is the same as the limiting effect on the fork 3; in the post-execution state, through the rotation of the reset shaft 41, the reset paddle 42 is driven to abut the fork 3, driving the fork 3 to rotate, so that the fork 3 is engaged with the Z-shaped lever 6, and enters the waiting execution state.

[0027] Working principle and use process of the utility model: When in use, the actuator has two working states: waiting for execution state and post-execution state, such as Figure 1 As shown, it is a waiting execution state. At this time, the Z-shaped lever 6 and the fork 3 are in a clamping state, and the ratchet 21 and the pawl 32 are in a clamping state. In this state, the outer end of the wire rope 23 is connected to the valve of the smoke exhaust valve, and the wire rope 23 should be in a tensioned state. If the wire rope 23 is in a relaxed state, the main shaft 2 can be rotated clockwise. Since the pawl 32 only limits the counterclockwise rotation of the main shaft 2, the wire rope 23 can be wound into the drum 22 by rotating the main shaft 2 clockwise until the valve restoring force of the outer end of the wire rope 23 is overcome, so that the wire rope 23 is in a tensioned state. At this time, the Z-shaped lever 6 can release the clamping constraint state of the shift fork 3 by energizing the electromagnet 52 and manually operating the hand-pulling swing rod 7, and then the shift fork 3 moves toward the fixed point of the tension spring 31 under the tension of the tension spring 31, and stops under the restriction of the shift fork limit 34. The shift fork 3 simultaneously drives the pawl 32 to rotate, and the pawl 32 releases the clamping constraint on the ratchet wheel 21. Under the action of the restoring force of the external smoke exhaust valve, the wire rope 23 is pulled, and the main shaft 2 is driven to rotate through the drum 22, and the wire rope 23 enters a relaxed state, which is the post-execution state. Figure 2 As shown, when the actuator switches from the waiting execution state to the post-execution state, the corresponding smoke exhaust valve changes the switch state under the action of the restoring force, thereby realizing the switch control of the smoke exhaust valve by the smoke exhaust valve actuator. Through the setting of the wire rope 23, the actuator can implement remote control of the smoke exhaust valve.

[0028] 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.

[0029] 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 smoke exhaust valve actuator using a Z-shaped lever, comprising a base (11), a main shaft (2), a shift fork (3), and an electromagnet (52); It is characterized in that A Z-shaped lever (6) is also provided. The Z-shaped lever (6) is in a "Z" shape. The upper corner of the Z-shaped lever (6) is rotatably connected to the upper end of the base (11). A clamping groove (61) is provided near the upper end point of the Z-shaped lever (6). The clamping groove (61) is adapted to be clamped with the end of the shift fork (3). The lower end point of the Z-shaped lever (6) is connected to the electromagnet (52). A hand-pull swing rod (7) is connected near the lower corner of the Z-shaped lever (6).

2. The smoke exhaust valve actuator using a Z-shaped lever according to claim 1, characterized in that: A main shaft (2) is rotatably provided on the upper end of the base (11), a ratchet (21) and a drum (22) are fixedly provided on the main shaft (2), a steel wire rope (23) is wound on the drum (22); a housing (12) is provided, a guide sleeve (13) is provided on the housing (12), and the steel wire rope (23) passes through the guide sleeve (13) to the outside; one end of the shift fork (3) is rotatably provided on the base (11), and a tension spring (31) is connected near the other end of the shift fork (3), and the tension spring (31) acts to move the shift fork (3) farther away The shift fork (3) is provided with a pawl (32) that cooperates with the ratchet (21); the shift fork (3) is connected to a reset rod (4); the electromagnet (52) is provided with an iron core (521); a wiring terminal (51) is provided, and the inner end of the wiring terminal (51) is electrically connected to the electromagnet (52); the clamping groove (61) is adapted to be clamped with the end of the shift fork (3) near the tension spring (31), the vicinity of the lower end of the Z-shaped lever (6) is connected to the outer end of the iron core (521), and the iron core (521) is sleeved with a spring (522).

3. The smoke exhaust valve actuator using a Z-shaped lever according to claim 2, characterized in that: A long hole (62) is provided near the lower end of the Z-shaped lever (6), and the outer end of the iron core (521) is movably connected to the long hole (62); a square wide hole (63) is provided near the lower corner of the Z-shaped lever (6), and the inner side of the square wide hole (63) is connected to a hand-pull swing rod (7).

4. The smoke exhaust valve actuator using a Z-shaped lever according to claim 2, characterized in that: A micro switch (53) is provided, the shift fork (3) is connected to a pressure plate (33), the pressure plate (33) abuts against the micro switch (53); and the inner end of the connection terminal (51) is electrically connected to the micro switch (53).

5. The smoke exhaust valve actuator using a Z-shaped lever according to claim 2, characterized in that: A shift fork limiter (34) is provided between the shift fork (3) and the fixed end of the tension spring (31), a reset rod (4) is provided between the shift fork (3) and the shift fork limiter (34), the reset rod (4) is provided with a reset shaft (41) and a reset paddle (42), the reset shaft (41) is rotatably arranged on the upper end of the base (11), a reset paddle (42) is fixedly arranged on the reset shaft (41), and the reset paddle (42) is connected to the shift fork (3).

Images