Efficient fireproof regulating valve for coating operation air supply system

Abstract

The utility model relates to an efficient fireproof regulating valve for a coating operation air supply system, which comprises a hollow valve body and a blade array rotationally connected with the valve body, a plurality of air nozzles are symmetrically arranged at the top of the valve body, and the blade array is pivoted on two side walls of the valve body through a blade rotating shaft. The two ends of a blade rotating shaft are connected with a pull rod motor through a first connecting rod mechanism, the other side of the first connecting rod mechanism is connected with a backup fusible piece, and an infrared temperature sensor and a laser dust sensor are fixedly connected to the interior of the side, close to the air inlet, of the valve body. Dust is directionally removed, airflow distribution is optimized, sealing performance is enhanced, and dust accumulation is prevented; and through cooperative work of the pull rod motor and the memory alloy spring backup fusible piece, redundancy protection is provided, it is ensured that the fire behavior is cut off in time, and safety and reliability are remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to fire fighting ventilation equipment technical field especially, it relates to a kind of efficient fireproof regulating valve for painting operation air supply system. BACKGROUND

[0002] In painting operation, fireproof regulating valve for air supply system is a kind of key equipment installed on ventilation duct, with air volume regulation and fire safety function, mainly used to ensure the safe operation of painting workshop in normal production and fire emergency situation.However, the existing fireproof regulating valve faces many challenges in practical application, for example, the patent with publication number CN205298721U discloses a multi-blade high-sealing smoke exhaust ventilation fireproof valve, which mainly relies on traditional fusible sheet response to cut off fire, and simultaneously adopts passive sealing by sealing sheet expansion, the response of traditional fusible sheet is lagging, often not timely cut off, and high-temperature airflow has spread through air pipe in the early stage of fire, and in the running process, paint mist and dust adhere to the inner wall of blade and valve body, causing blade jamming, air volume and air pressure regulation failure, traditional manual cleaning needs frequent shutdown, production efficiency is low, monitoring deviation exists, causing great safety hazard, so it is urgent to design a structure that can consider anti-sticking cleaning and ultra-fast closing, cutting off or spreading, improving production efficiency while ensuring safety. SUMMARY

[0003] (I) technical problem solved

[0004] In view of the limitations of the existing fireproof regulating valve, the utility model aims to provide a kind of efficient fireproof regulating valve for painting operation air supply system, which cooperates with memory alloy (SMA) spring backup fusible sheet by pull rod motor, to ensure that blade is closed in extreme state, at the same time, adopt "S" shape blade to form sealing structure by mutual overlapping, and combine with symmetrically arranged compressed air nozzle and dust sensor to control air injection, directional dust removal, to avoid the influence of sealing performance due to dust accumulation, solve the problems of traditional fireproof regulating valve, such as paint mist blockage leading to regulation failure, frequent maintenance, fire response lag, monitoring deviation and insufficient single trigger reliability, improve anti-clogging ability, response speed and monitoring accuracy, and enhance system safety and automation level.

[0005] (II) technical scheme

[0006] In order to achieve the above object, the utility model provides the following technical scheme: A kind of high-efficiency fireproof regulating valve for painting operation air supply system, including the valve body of internal hollow and the blade array rotationally connected with valve body, several air nozzles are symmetrically arranged in valve body top, blade array is hinged in the two side walls of valve body by blade pivot, the two ends of blade pivot extend to the outside of valve body, the two ends of blade pivot that extend out of valve body are connected pull rod motor by first connecting rod mechanism, the other side of first connecting rod mechanism is connected with backup fusible piece by second connecting rod mechanism, infrared temperature sensor and laser dust sensor are fixedly connected in the inside of the side of valve body close to air inlet, infrared temperature sensor and laser dust sensor realize information interaction with air nozzle and pull rod motor by terminal control system.Laser dust sensor is used for monitoring dust condition in valve body, avoids that dust accumulation influences tightness;First connecting rod mechanism converts the linear motion of pull rod motor into the rotary motion of blade pivot, controls blade opening and closing;Second connecting rod mechanism is connected with backup fusible piece (memory alloy spring), and forms double insurance mechanism with pull rod motor, avoids single point failure risk.

[0007] Preferably, the blade array includes at least two "S" shaped blades, each blade has a blade pivot arranged in the middle, and each blade has a plurality of pointed protrusions arranged on the concave surface of both sides, and each blade has a wave-shaped pattern arranged on the outer surface along the vertical direction of the blade. The blade opens and closes by rotating around the blade pivot. The curved shape can closely fit the internal flow passage of the valve body when closed, reducing air leakage. When opened, it guides the airflow to pass uniformly, reducing the flow resistance. The pointed protrusions can increase the contact area to form a better sealing environment. The wave-shaped pattern on the outer surface increases the surface area of the blade and disturbs the airflow boundary layer, reducing the adhesion and accumulation of dust on the blade surface. In combination with the air nozzle, it realizes self-cleaning function, ensuring the sealing performance and long-term operation reliability of the valve.

[0008] Preferably, the first connecting rod mechanism includes a rotating rod connected to the two ends of each blade pivot, and the other end of the rotating rod is fixed on a moving rod. The moving rod is long and parallel to the valve body, with one end connected to the output end of the pull rod motor. The second connecting rod mechanism includes a fixed block fixed on the inner wall of the valve body and a connecting block fixedly connected to the other end of the moving rod. The fixed block and the connecting block are respectively connected to the two ends of the backup fusible piece. The pull rod motor outputs linear motion, which drives the blade pivot to rotate through the rotating rod, accurately controlling the opening and closing angle of the blade. The backup fusible piece (SMA spring) has temperature sensitivity. When the environmental temperature exceeds the set threshold (such as 70℃, the critical temperature of fire), the memory alloy triggers mechanical linkage due to thermal deformation, pulls the moving rod through the connecting block, and forcibly closes the blade, forming a double insurance fireproof mechanism. Even if the pull rod motor fails or the control system fails, the valve can still be passively closed through temperature sensing, avoiding single point failure leading to fire failure.

[0009] Preferably, the valve body is provided with heat-conducting silica gel on the inner wall of the side close to the air inlet.

[0010] Preferably, the compressed air nozzles are symmetrically arranged along the axis of the blade shaft. During daily operation, the air nozzles can be activated periodically or according to the dust sensor signal to remove dust (such as paint mist particles in painting operation) adhered to the surface of the blades, thereby maintaining the sealing performance of the valve.

[0011] Further, the blades can be blown by air before being closed to ensure that no dust is stuck during closing, thereby improving the sealing reliability.

[0012] Preferably, when the pull rod motor is in the extreme contraction and extreme elongation state, the blade array is in the closed state, and the backup fusible sheet is made of shape memory alloy (SMA) spring, which can adapt to the contraction and elongation of the pull rod motor.

[0013] (Three) beneficial effects

[0014] (1) The "S" shaped blade with a pointed end protrusion and a wave-shaped pattern on the surface is adopted, and the air nozzles and the laser dust sensor are symmetrically arranged to remove dust in a directional manner, realize self-cleaning function, optimize airflow distribution, and reduce turbulent resistance; the pointed end protrusion and the wave-shaped pattern can enhance the sealing performance, prevent dust accumulation, and avoid the influence of accumulated dust on the sealing performance.

[0015] (2) The pull rod motor cooperates with the shape memory alloy (SMA) spring backup fusible sheet to ensure that the blades are closed in the extreme state. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a whole front view of the utility model;

[0017] Figure 2 It is a whole side view (one side of the air inlet) of the utility model;

[0018] Figure 3 It is a schematic view of the first connecting rod mechanism and the second connecting rod mechanism in the utility model;

[0019] Figure 4 It is a schematic view of the blade structure in the utility model;

[0020] In the figure: 1-valve body, 11-heat-conducting silica gel, 101-compressed air nozzle, 2-vane array, 201-vane, 202-vane pivot, 3-first connecting rod mechanism, 301-rotary rod, 302-moving rod, 4-pull rod motor, 5-second connecting rod mechanism, 501-fixed block, 502-connection block, 6-backup fusible link, 7-infrared temperature sensor, 8-laser dust sensor. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. Figure 1 -Appendix Figure 4 The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

[0022] Embodiment one: a kind of high-efficiency fireproof regulating valve for painting operation air supply system, including the valve body 1 of internal hollow and the vane array 2 of rotationally connected with valve body 1, valve body top is symmetrically arranged with several air nozzles 101, vane array 2 is hinged to the two side walls of valve body 1 by vane pivot 202, the two ends of vane pivot 202 extend to the outside of valve body 1, the two ends of vane pivot 202 that extend out of valve body 1 are connected pull rod motor 4 by first connecting rod mechanism 3, the other side of first connecting rod mechanism 3 is connected with backup fusible link 6 by second connecting rod mechanism 5, infrared temperature sensor 7 and laser dust sensor 8 are fixedly connected in the inside of the side of valve body 2 close to air inlet, infrared temperature sensor 7 and laser dust sensor 8 are realized information interaction with air nozzle 101 and pull rod motor 4 by terminal control system.Infrared temperature sensor 7 is located in the side of air inlet to facilitate rapid detection of temperature and timely response, when the temperature in valve body 1 is detected to exceed threshold value, rapidly transmit data to terminal, and terminal in turn controls pull rod motor 4 to rapidly pull or push first connecting rod mechanism 3 to move, drives vane array 2 to close, and timely cuts off fire operation, the temperature threshold of backup fusible link 6 is higher than the drive threshold of pull rod motor 4, when backup fusible link 6 reaches threshold value, fusible link breaks in turn and makes vane array 2 close rapidly, and cut off fire spread.

[0023] When temperature does not reach threshold value, vane array 2 is in open state, laser dust sensor 8 monitors dust, when dust reaches set value, air nozzle 101 is controlled to operate by terminal, and air nozzle 101 blows air to vane 201 and the bottom of valve body 1, to prevent dust from being blocked, in addition, air nozzle 101 can also be set to work regularly in terminal, and blow air in valve body regularly.

[0024] The blade array 2 comprises at least two "S" shaped blades 201, each blade 201 is provided with a blade rotating shaft 202 in the middle, and each blade 201 is provided with a plurality of pointed protrusions on the concave surface on both sides, and the outer surface of each blade is provided with a wavy pattern along the vertical direction of the blade. When the blades 201 are closed, the two sides of the adjacent two blades overlap each other to form a sealed structure, that is, when the blades are closed, the edges of the adjacent two blades stagger and contact each other, and the pointed protrusions in the concave part tightly contact each other to form a friction force, so that the blades are tightly fitted, and the side of the blade in contact with the inner wall of the valve body 1 can also be well fitted with the inner wall of the valve body 1, forming a seamless closed space in the valve body 1, and the fire is blocked. The wavy pattern is arranged along the direction of the air nozzle 101, and the side where the air nozzle 101 is arranged is regarded as the top end of the valve body 1, the air nozzle 101 blows air towards the bottom end of the valve body 1, and the wavy pattern can guide the gas at the top end to the bottom end, and can also guide the dust to avoid the dust adhering to the surface of the blade.

[0025] The first connecting rod mechanism 3 comprises a rotating rod 301 rotatably connected to both ends of each blade rotating shaft 202, and the other end of the rotating rod 301 is fixed to a moving rod 302. The moving rod 302 is long strip-shaped, is arranged parallel to the valve body 1, and one end is connected to the output end of the pull rod motor 4. The second connecting rod mechanism 5 comprises a fixed block 501 fixed to the inner wall of the valve body 1 and a connecting block 502 fixedly connected to the other end of the moving rod 302, and the fixed block 501 and the connecting block 502 are respectively connected to the two ends of the backup fusible link 6. The long strip-shaped moving rod 302 is arranged parallel to the valve body 1, that is, the moving rod 302 moves horizontally, each blade rotating shaft 202 is connected to the moving rod 302 through a rotating rod 301, and the horizontal movement of the moving rod 302 can drive the synchronous rotation of the rotating rod 301 connected to the moving rod 302, and the rotation of the rotating rod 301 further drives the synchronous rotation of the blade rotating shaft 202. It should be noted that all the rotating rods 301 are connected to the moving rod 302, and the movement of the moving rod 302 drives the synchronous rotation of all the rotating rods 301. The two sides of the moving rod 302 are respectively connected to the pull rod motor 4 and the backup fusible link 6, when the pull rod motor 4 pulls the moving rod 302 to move, the other side of the backup fusible link 6 is elongated, when the pull rod motor 4 pushes the moving rod 302 to move, the backup fusible link 6 is contracted, and the blade array 2 remains in an open state, and when the blades 201 are parallel to the side wall of the valve body 1, the pull force of the pull rod motor 4 and the backup fusible link 6 on the moving rod 302 is balanced.

[0026] The inner wall of the valve body 1 near the air inlet is circumferentially provided with heat-conducting silica gel 11, which is high-temperature-resistant (temperature resistance ≥ 300℃), and is circumferentially attached to the inner wall of the air inlet side of the valve body 1 in the form of a strip or a sheet, and is located in front of the infrared temperature sensor 7 in the depth direction. The heat-conducting silica gel 11 has a heat-conducting effect, helps the infrared temperature sensor 7 to detect temperature more quickly and accurately, and is provided with a rough surface to enhance the contact area with the airflow.

[0027] The air nozzles 101 are arranged in two rows and are arranged symmetrically along the blade rotation shaft 202 as the axis. That is, the air nozzles 101 are arranged on both sides of the blade 201 (the inlet side and the outlet side) to blow air to the surface of the blade 201 and the bottom of the valve body 1. The air nozzles 101 achieve full coverage in the width direction of the valve body 1, ensuring that the air flow of the air nozzles 101 can cover the surface of all the blades 201, and dust can be removed in time and the blockage can be cleared in an emergency.

[0028] In time dust removal: when the laser dust sensor detects that the concentration is >10 mg / m 3 , the terminal system controls the nozzle to spray intermittently in pulse mode (0.5-1 Hz) with air pressure 0.3-0.5 MPa to remove the dust on the surface of the blade.

[0029] Emergency unblocking: when the dust concentration is >50 mg / m 3 or the blade movement resistance is abnormal, switch to continuous spraying mode (air pressure 0.8-1 MPa) to force the dust accumulation area to be unblocked.

[0030] In addition, the terminal system can also set a dust removal time, and spray once every 3-5 hours to remove dust regularly.

[0031] When the pull rod motor 4 is in the extreme contraction and extreme elongation state, the blade array 2 is in the closed state, and the backup fusible sheet 6 adopts a shape memory alloy (SMA) spring, which can adapt to the contraction and elongation of the pull rod motor 4. This also means that when the pull rod motor 4 is completely retracted, the moving rod 302 is pulled to the limit position by the moving rod 302, the blade rotation shaft 202 is rotated to the closed angle, and at this time the backup fusible sheet 6 is in the elongation state, which generates a pulling force on the moving rod 302 to prevent overload; when the pull rod motor 4 is fully extended, the moving rod 302 moves in the opposite direction, and at this time the SMA spring is compressed, and its pre-tightening force compensates for the displacement, and the blade also remains closed.

[0032] It should be noted that the realization of the elongation state here needs to integrate a reset spring to ensure that the SMA is passively elongated after cooling, that is, a reset spring is arranged between the second linkage mechanism 5 and the moving rod 302, and the reset spring adopts the prior art, so its specific arrangement and connection mode are not described in detail.

[0033] Further, if the pull rod motor 4 is powered off or stuck, the SMA spring will contract when the temperature reaches a threshold, pull the moving rod 302 through the second linkage mechanism 5, and forcibly close the blade 201. After the blade 201 is closed, the residual stress of the SMA spring and the mechanical limit block jointly lock the blade position to prevent accidental opening due to vibration or air pressure fluctuations.

[0034] Working principle: when in use, in the normal temperature environment, the blade array 2 is in the open state, and the regulating valve is in the normal ventilation mode. At this time, the air can freely pass through the valve body 1 to provide the required air flow for the painting operation air supply system; in the process, the infrared temperature sensor 7 will monitor the temperature in the valve body 1 in real time and transmit the data to the terminal, when the infrared temperature sensor 7 detects that the temperature inside the valve body 1 exceeds the set pull rod motor 4 driving threshold value, the terminal control system receives the data, and immediately controls the pull rod motor 4 to act, the pull rod 4 pulls or pushes the moving rod 302 in the first connecting rod mechanism 3 to move, the horizontal movement of the moving rod 302 drives the rotating rod 301 to rotate, the rotation of the rotating rod 301 in turn drives the blade shaft 202 to rotate synchronously, the blade array 2 quickly closes, cutting off the propagation path of the fire through the valve body 1; if the temperature continues to rise, the threshold value of the backup fusible piece 6, the backup fusible piece 6 will shrink and deform, if the pull rod motor 4 is powered off or stuck at this time, the backup fusible piece 6 will pull the moving rod 302 through the second connecting rod mechanism 5, forcing the blade 201 to close, after the blade 201 is closed, the adjacent two blades 201 are staggered, the convex of the concave surface is firmly attached to each other, ensuring the sealing property.

[0035] Example two: when performing dust removal operation, first, the laser dust sensor 8 will monitor the dust in the valve body 1 in real time, and transmit the data to the terminal control system. When the laser dust sensor 8 detects that the dust concentration > 10 mg / m 3 , the terminal control system will control the air nozzle 101 to intermittently spray in pulse mode (0.5-1 Hz), remove the floating dust on the surface of the blade 201, the air nozzle 101 symmetrically arranged along the blade shaft 202 fully covers in the width direction of the valve body 1, which can ensure that the air flow covers all the blade surfaces and effectively removes the dust; when the dust concentration > 50 mg / m 3 or the blade movement resistance is abnormal, the terminal control system will switch the air nozzle 101 to continuous spraying mode to forcibly dredge the dust accumulation area. When the air nozzle 101 sprays air flow, the wavy lines on the surface of the blade 201 can guide the air flow to balance the air flow direction to the bottom of the valve body 1.

Claims

1. A high-efficiency fire damper valve for a painting job air supply system, comprising a valve body (1) which is hollow inside and a blade array (2) which is rotatably connected to the valve body (1), characterized in that, The valve body (1) top symmetrical arrangement of several air nozzle (101), the blade array (2) by blade pivot (202) pivotally connected to the valve body (1) two side walls, the blade pivot (202) both ends extend to the outside of the valve body (1), blade pivot (202) extending out of the valve body (1) both ends by the first connecting rod mechanism (3) connecting pull rod motor (4), the other side of the first connecting rod mechanism (3) by the second connecting rod mechanism (5) connected with backup fusible link (6), the valve body (1) near the air inlet side of the internal fixed connection with infrared temperature sensor (7) and laser dust sensor (8), the infrared temperature sensor (7) and laser dust sensor (8) through the terminal control system and the air nozzle (101) and pull rod motor (4) realize information interaction.

2. The high-efficiency fire-rated damper according to claim 1, wherein The blade array (2) comprises at least two "S" shaped blade (201), each blade (201) is provided with the blade pivot (202) in the middle, the concave surface of each side of the blade (201) is provided with a plurality of sharp end protrusions, the outer surface of each blade (201) is provided with a wavy pattern along the vertical direction of the blade.

3. The high efficiency fire damper according to claim 1, wherein The first connecting rod mechanism (3) comprises a rotating rod (301) rotatably connected to both ends of each blade pivot (202), the other end of the rotating rod (301) is fixed on the moving rod (302), the moving rod (302) is long strip-shaped, parallel to the valve body (1) and one end connected to the output end of the pull rod motor (4), the second connecting rod mechanism (5) comprises a fixed block (501) fixed on the inner wall of the valve body (1) and a connecting block (502) fixedly connected with the other end of the moving rod (302), the fixed block (501) and the connecting block (502) are respectively connected with both ends of the backup fusible link (6).

4. The high efficiency fire damper control valve for a paint job air supply system according to claim 1, wherein The valve body (1) near the air inlet side of the inner wall is provided with heat conducting silica gel (11) circumferentially.

5. The high efficiency fire damper control valve for a paint job air supply system of claim 1, wherein, The air nozzle (101) is provided with two rows, which are symmetrically arranged along the blade pivot (202) as the axis.

6. The high efficiency fire damper control valve for a paint job air supply system of claim 1, wherein When the pull rod motor (4) is in the extreme contraction and extreme elongation state, the blade array (2) is in the closed state, the backup fusible link (6) adopts a memory alloy (SMA) spring, which can adapt to the contraction and elongation of the pull rod motor (4).

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