Electromagnetic actuating mechanism of turning plate type fireproof air valve

Abstract

The utility model provides an electromagnetic actuating mechanism of a turning plate type fireproof air valve. The electromagnetic actuating mechanism comprises a back plate, a bearing seat, a linear bearing, an electromagnet, an elastic piece, a plug pin and a limiting piece. The bearing seat and the electromagnet are oppositely fixed on the back plate, and a linear bearing is fixed on the bearing seat; one end of the iron core is arranged in the electromagnet shell, the other end of the iron core extends out of the shell, and the coil is installed in the shell and provided with an iron core movement space. One end of the bolt penetrates through the linear bearing and is fixed with the iron core, and the other end is positioned outside the bearing seat and matched with the fireproof air valve; the limiting piece is fixed on the iron core and is positioned outside the shell; the elastic piece sleeves the outer surface of the iron core and is located outside the shell, and the two ends of the elastic piece abut against the limiting piece and the shell respectively; the electromagnet is electrified, and the iron core part retracts to drive the bolt to be separated from the fireproof air valve and compress the elastic piece; and during power failure, the elastic piece resets, and the iron core part extends out to drive the bolt to lock the fireproof air valve. According to the utility model, the problem that the traditional actuating mechanism is jammed due to overlarge resistance of pulling the bolt can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of fireproof air dampers, in particular to an electromagnetic actuator of a flap-type fireproof air damper. Background Art

[0002] The flap-type fire damper of a nuclear power plant is usually installed on the roof exhaust duct. In the event of a fire, the actuator will pull out the pin and open the fire door panel in time to discharge toxic and harmful smoke and dust from the room to prevent people from inhaling toxic gases and suffocating to death. However, the on-site installation environment of the flap-type fire damper of a nuclear power plant has the characteristics of small working space, physical obstruction, and being located in sensitive areas, which can easily cause individual nuclear power equipment to be completely blocked, making it impossible for people to reach. Once a nuclear power equipment fails and maintenance becomes difficult or even impossible, it will cause the unit to shut down. Therefore, it is necessary to keep the flap-type fire damper open normally.

[0003] At present, in the actuator of the flap-type fire damper, the pin fixing bracket is made of a U-shaped structure using a stamping process, and a copper sleeve is embedded inside to maintain the axial movement of the movable pin. At the same time, the pin is slightly deformed due to the pressure exerted by the door panel, resulting in the radial force exerted on the pin by the supporting copper sleeve being much greater than the coaxial motion friction force, resulting in the actuator of the flap-type fire damper having to overcome a large friction force when pulling the pin under load pressure, which is prone to jamming.

[0004] Therefore, it is necessary to develop a new actuator for a flap-type fire damper that can overcome the problem of traditional actuators being stuck due to excessive resistance to pulling the latch. Utility Model Content

[0005] The technical problem to be solved by the embodiments of the utility model is to provide an electromagnetic actuator for a flap-type fire damper, which can overcome the problem of the traditional actuator being stuck due to excessive resistance to pulling the latch.

[0006] In order to solve the above technical problems, the embodiment of the utility model provides an electromagnetic actuator of a flap-type fire damper, which cooperates with the fire damper and includes a back plate, a bearing seat, a linear bearing, an electromagnet, an elastic member, a latch and a limit member; wherein,

[0007] The bearing seat is fixed on the back plate relative to the electromagnet, and the linear bearing is fixedly mounted on the bearing seat;

[0008] The electromagnet comprises a shell, a coil and an iron core; one end of the iron core is located in the shell, and the other end extends out of the shell in the direction toward the bearing seat and a certain distance is reserved between the bearing seat; the coil is installed in the shell, and is arranged around the outer surface of the iron core and a space is reserved for the axial reciprocating movement of the iron core;

[0009] One end of the latch passes through the linear bearing in the direction toward the iron core and is fixed to the iron core, and the other end is located on a side of the bearing seat away from the iron core and cooperates with the fire damper;

[0010] The limiting member is fixed on the iron core and is located outside the shell;

[0011] The elastic member is sleeved on the outer surface of the iron core and is located outside the shell, and its two ends are respectively against the limit member and the shell;

[0012] When the electromagnet is energized, the iron core part retracts into the shell to drive the latch to disengage from the fire damper and compress the elastic part; when the electromagnet is de-energized, the iron core part extends out of the shell through the resetting action of the elastic part to drive the latch to lock the fire damper.

[0013] Wherein, the linear bearing is a rolling bearing used for linear motion.

[0014] The linear bearing is in the shape of a hollow cylinder and comprises a housing, balls, a bushing and a retaining spring.

[0015] Among them, it also includes: a baffle; among them,

[0016] The blocking piece is in the shape of a hollow tube, which is sleeved on the outer surface of the latch and fixed to the latch, and is located between the bearing seat and the iron core.

[0017] Wherein, the elastic member is a spring.

[0018] Wherein, the limiting member is a flange fixed on the iron core.

[0019] Wherein, the limiting member is a pin structure detachably mounted on the iron core, which includes a limiting shaft and two bolts detachably mounted on both ends thereof; wherein,

[0020] The iron core is provided with a first through hole along the radial direction;

[0021] The limiting shaft passes through the first through hole of the iron core in the radial direction, and when both ends of the limiting shaft are located outside the iron core, the limiting shaft is locked by the two bolts to be fixed to the iron core.

[0022] Wherein, the core is provided with a groove on the axial end surface for the pin to penetrate, and the groove is in conduction with the first through hole;

[0023] The latch pin is provided with a second through hole in the radial direction, and the second through hole is located in the groove and aligned with the first through hole so that the two are located on the same axis;

[0024] The limiting shaft penetrates into the first through hole and the second through hole, and when both ends thereof are located outside the iron core, the limiting shaft is locked by the two bolts to be fixed to the iron core.

[0025] Wherein, the back plate is made of stainless steel.

[0026] Implementing the embodiments of the utility model has the following beneficial effects:

[0027] Compared with the traditional actuator of the flap-type fire damper, the electromagnetic actuator of the utility model uses a linear bearing instead of a copper sleeve to support the pin that cooperates with the fire damper, which greatly reduces the friction and thus overcomes the problem of the traditional actuator getting stuck due to excessive resistance to pulling the pin. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the utility model.

[0029] Figure 1 A top view of an electromagnetic actuator of a flap-type fire damper provided in an embodiment of the utility model;

[0030] Figure 2 It is a front view of an electromagnetic actuator of a flap-type fire damper provided in an embodiment of the utility model;

[0031] Figure 3 It is a partial structural diagram of the iron core, latch and limit member of the electromagnet in the electromagnetic actuator of a flap-type fire damper provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings.

[0033] like Figures 1 to 3 As shown, an electromagnetic actuator of a flap-type fire damper is provided in an embodiment of the utility model, which cooperates with the fire damper (not shown), including a back plate 1, a bearing seat 2, a linear bearing 3, an electromagnet 4, an elastic member 5, a latch 6 and a limit member 7; wherein,

[0034] The back plate 1 is made of stainless steel and is mounted on the fire damper body frame (not shown);

[0035] The bearing seat 2 and the electromagnet 4 are fixed to the back plate 1 by screws. The bearing seat 2 is a cubic structure made of stainless steel, and a linear bearing 3 is fixedly installed on the bearing seat 2.

[0036] The linear bearing 3 is a rolling bearing for linear motion, which is in a hollow cylindrical shape and includes a housing, a ball, a bushing and a retaining spring. It should be noted that the linear bearing 3 is a common component, and its internal structure and connection relationship are not described here. The linear bearing 3 is fixed to the bearing seat 2 by the retaining spring provided thereon.

[0037] The electromagnet 4 includes a housing 41, a coil 42 and an iron core 43; one end of the iron core 43 is located in the housing 41, and the other end extends out of the housing 41 in the direction toward the bearing seat 2 and a certain distance is reserved between the bearing seat 2, so as to avoid collision between the two; the coil 42 is installed in the housing 41, and is arranged around the outer surface of the iron core 43 and a space is reserved for the axial reciprocating movement of the iron core 43; it should be noted that the electromagnet 4 is a commonly used component (such as TAU-1683H high torque electromagnet), and its working principle is not repeated here;

[0038] One end of the latch 6 passes through the linear bearing 3 in the direction toward the core 43 and is fixed to the core 43 by means of threaded connection, snap connection, etc., and the other end is located on the side of the bearing seat 2 away from the core 43 and cooperates with the fire damper; at this time, the linear bearing 3 supports the latch 6 inserted inside through evenly distributed balls to share the surface pressure of the latch 6, so that a large amount of friction is reduced due to the relative movement of the balls during the pulling process of the latch 6, thereby avoiding the situation where the electromagnet 4 cannot be pulled; in one example, the latch 6 is a cylindrical structure made of stainless steel, one end of which is connected to the core 43 is a flat structure, and the end cooperating with the fire damper is a conical structure for manual reset;

[0039] The stopper 7 is made of stainless steel, fixed on the iron core 43 and located outside the housing 41; for example, the stopper 7 is a flange fixed on the iron core 43; or the stopper 7 is a pin structure detachably mounted on the iron core 43; in this case, the stopper 7 can be flexibly designed according to actual requirements;

[0040] The elastic member 5 (such as a spring) is sleeved on the outer surface of the iron core 43 and is located outside the housing 41, and its two ends are respectively against the limit member 7 and the housing 41;

[0041] When the electromagnet 4 is energized, the iron core 43 partially retracts into the shell 41 to drive the latch 6 to disengage from the fire damper and compress the elastic member 5; when the electromagnet 4 is de-energized, the iron core 43 partially extends out of the shell 41 through the resetting action of the elastic member 5 to drive the latch 6 to lock the fire damper.

[0042] In one example, if the limiting member 7 is a flange, it can be fixed by opening a slot on the iron core 43 and inserting the flange into the slot.

[0043] In another example, if the limiting member 7 is a pin shaft structure that can be detachably mounted on the iron core 43, it includes a limiting shaft 71 and two bolts 72 that can be detachably mounted on both ends of the limiting shaft 71; wherein, the iron core 43 has a first through hole 431 radially formed therein; the limiting shaft 71 radially passes through the first through hole 431 of the iron core 43, and when both ends thereof are located outside the iron core 43, they are locked by the two bolts 72 to achieve fixation with the iron core 43.

[0044] In another example, if the limiting member 7 is a pin structure detachably mounted on the iron core 43, it includes a limiting shaft 71 and two pins 72 detachably mounted on both ends thereof; wherein,

[0045] The core 43 is provided with a groove 432 on the axial end surface for the insertion of the plug 6, and a first through hole 431 is provided in the radial direction, and the groove 432 is in conduction with the first through hole 431;

[0046] The latch 6 is provided with a second through hole 61 in the radial direction, and the second through hole 61 is located in the groove 432 and aligned with the first through hole 431, so that the two are located on the same axis;

[0047] The limiting shaft 71 passes through the first through hole 431 and the second through hole 61 , and when both ends thereof are located outside the iron core 43 , the limiting shaft 71 is locked by two bolts 72 to be fixed to the iron core 43 .

[0048] In an embodiment of the utility model, the electromagnetic actuator also includes: a baffle 8; wherein the baffle 8 is in the shape of a hollow tube, which is sleeved on the outer surface of the pin 6 and fixed to the pin 6, and is located between the bearing seat 2 and the iron core 43 to control the movement length of the pin 6.

[0049] Implementing the embodiments of the utility model has the following beneficial effects:

[0050] Compared with the traditional actuator of the flap-type fire damper, the electromagnetic actuator of the utility model uses a linear bearing instead of a copper sleeve to support the pin that cooperates with the fire damper, which greatly reduces the friction and thus overcomes the problem of the traditional actuator getting stuck due to excessive resistance to pulling the pin.

[0051] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

Claims

1. An electromagnetic actuator for a flap-type fire damper, which cooperates with the fire damper, characterized in that: It includes a back plate, a bearing seat, a linear bearing, an electromagnet, an elastic part, a latch and a limiter; wherein, The bearing seat is fixed on the back plate relative to the electromagnet, and the linear bearing is fixedly mounted on the bearing seat; The electromagnet comprises a shell, a coil and an iron core; one end of the iron core is located in the shell, and the other end extends out of the shell in the direction toward the bearing seat and a certain distance is reserved between the bearing seat; the coil is installed in the shell, and is arranged around the outer surface of the iron core and a space is reserved for the axial reciprocating movement of the iron core; One end of the latch passes through the linear bearing in the direction toward the iron core and is fixed to the iron core, and the other end is located on a side of the bearing seat away from the iron core and cooperates with the fire damper; The limiting member is fixed on the iron core and is located outside the shell; The elastic member is sleeved on the outer surface of the iron core and is located outside the shell, and its two ends are respectively against the limit member and the shell; When the electromagnet is energized, the iron core part retracts into the shell to drive the latch to disengage from the fire damper and compress the elastic part; when the electromagnet is de-energized, the iron core part extends out of the shell through the resetting action of the elastic part to drive the latch to lock the fire damper.

2. The electromagnetic actuator of the flap type fire damper according to claim 1, characterized in that: The linear bearing is a rolling bearing used for linear motion.

3. The electromagnetic actuator of the flap-type fire damper according to claim 2, characterized in that: The linear bearing is in a hollow cylindrical shape and comprises a housing, balls, a bushing and a retaining spring.

4. The electromagnetic actuator of the flap type fire damper according to claim 3, characterized in that: Also includes: baffle; wherein, The blocking piece is in the shape of a hollow tube, which is sleeved on the outer surface of the latch and fixed to the latch, and is located between the bearing seat and the iron core.

5. The electromagnetic actuator of the flap type fire damper according to claim 4, characterized in that: The elastic member is a spring.

6. The electromagnetic actuator of the flap-type fire damper according to claim 5, characterized in that: The limiting member is a flange fixed on the iron core.

7. The electromagnetic actuator of the flap-type fire damper according to claim 5, characterized in that: The position-limiting member is a pin structure detachably mounted on the iron core, which includes a position-limiting shaft and two detachably mounted bolts at both ends thereof; wherein, The iron core is provided with a first through hole along the radial direction; The limiting shaft passes through the first through hole of the iron core in the radial direction, and when both ends of the limiting shaft are located outside the iron core, the limiting shaft is locked by the two bolts to be fixed to the iron core.

8. The electromagnetic actuator of the flap-type fire damper according to claim 7, characterized in that: The iron core is provided with a groove on the axial end surface for the insertion of the latch pin, and the groove is in conduction with the first through hole; The latch pin is provided with a second through hole in the radial direction, and the second through hole is located in the groove and aligned with the first through hole so that the two are located on the same axis; The limiting shaft penetrates into the first through hole and the second through hole, and when both ends thereof are located outside the iron core, the limiting shaft is locked by the two bolts to be fixed to the iron core.

9. The electromagnetic actuator of the flap type fire damper according to claim 6 or 8, characterized in that: The back plate is made of stainless steel.

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