CN207796195U - Check-valves and central cooking fume control equipment - Google Patents

Abstract

The utility model provides a kind of check-valves and central cooking fume control equipment, is related to purification technology field.The check-valves includes valve body and valve block, valve body is equipped with affixed driving device and linking arm, the free end of valve block and linking arm is hinged, driving device is drivingly connected arm and valve block and is axially moved along valve body, actuator is equipped in valve body, angular turn occurs for movement driving valve block of the actuator with valve body along valve body axial direction, to change sealed condition of the valve block to valve body；The center cooking fume control equipment includes kitchen ventilator and above-mentioned check-valves, and check-valves is communicated between the exhaust outlet of kitchen ventilator and the gas outlet of common flue.Valve block realizes angular turn under the drive of linking arm, the driving effect of actuator, completes the closure to valve body and controls, valve block reduces oil smoke recharge and the generation for phenomenon of uttering long and high-pitched sounds to the closure good airproof performance of valve body.

Description

Check-valves and central cooking fume control equipment

Technical field

The utility model is related to purification technology field more particularly to a kind of check-valves and central cooking fume control equipments.

Background technology

The manufacturing process of Chinese tradition cooking culture includes decocting, frying, is fried, is roasting etc., is produced during making food big The oil smoke of amount, and oil smoke is not only more serious to the environmental pollution in kitchen, and also kitchen operation personnel stay in oil smoke surroundings for a long time It is larger to body harm, it is serious, or even cancer can be suffered from, therefore, people devise to reduce harm of the oil smoke to human body Oil smoke in kitchen can be transported to external kitchen ventilator, kitchen ventilator is widely used among kitchen therewith.

In existing kitchen ventilator, in order to reduce or even avoid the oil smoke of discharge kitchen ventilator, recharge enters kitchen ventilator again, and Into in kitchen, it will usually a check-valves be set between the exhaust outlet and exhaust pipe of kitchen ventilator, limited by check-valves The flow direction of oil smoke so that oil smoke can only flow into exhaust pipe from kitchen, kitchen ventilator, and oil cannot be passed back into out of exhaust pipe Smoke machine.Present central cooking fume control equipment is in use, be generally connected to the exhaust outlet and common flue of kitchen ventilator, in common flue Interior suction generates negative pressure, and check-valves is arranged between exhaust outlet and common flue, and oil smoke is controlled by controlling the switch of check-valves The switch of machine；In existing check-valves, valve block is directly anchored in shaft, and valve block is rotated with the rotation of shaft, Jin Ergai Become the sealed condition to valve body, that is, the position of valve block is in same plane, sealed condition when the shaft and sealed condition of valve block rotation When, the leakproofness positioned at valve block part and valve body in check-valves at shaft both ends is difficult to ensure, leads to the oil in common flue In cigarette recharge to kitchen, and when valve block leakproofness is poor, since there are pressure differences for valve block both sides gas, when gas circulates from gap Valve block can be caused to utter long and high-pitched sounds phenomenon.

Utility model content

The purpose of this utility model is to provide a kind of check-valves and central cooking fume control equipments, to solve in the prior art The leakproofness of existing check-valves middle valve plate and valve body is poor, leads to the oil smoke recharge of common flue, and when sealed condition, is easy Generation utter long and high-pitched sounds phenomenon the technical issues of.

Check-valves provided by the utility model, including valve body and valve block, the valve body are equipped with driving device, the driving The driving end of device is connected with linking arm, and the free end of the valve block and the linking arm is hinged, and the driving device is for driving Move axially reciprocating of the linking arm along the valve body；It is equipped in the valve body for driving the valve block to turn around hinged place Dynamic actuator, during the valve block blocks end under the drive of the linking arm close to the valve body, the actuator It drives the valve block to rotate, the valve body is blocked；The valve block is under the drive of the linking arm far from the valve body During blocking end, the actuator drives the valve block rotation, the valve body to be in connected state.

Further, the actuator includes block piece and restoring piece, and the block piece is set in the valve body, the valve During piece blocks end far from the valve body, abuts with the block piece and rotate around hinged place, the valve body is in Connected state；The restoring piece be set to the valve block on, the valve block close to the valve body block end during, the recovery Part drives the valve block rotation to reset, and is blocked to the valve body.

Further, the inner wall of the valve body is equipped with annular convex platform, and described when the valve block blocks the valve body Annular convex platform abuts.

Further, the annular convex platform is equipped with the convex ribs of concentric, and it is close that the convex ribs protrude the annular convex platform The end face of the valve block side, the valve block are equipped with annular groove, and the annular groove matches with the convex ribs, the valve block pair When the valve body blocks, the convex ribs are embedded in the annular groove.

Further, sealing ring is inlaid in the annular groove, when the valve block blocks the valve body, the convex ribs with The sealing ring closely abuts.

Further, the block piece includes turning rolls and idler wheel, and the turning rolls is fixedly arranged on the inner wall of the valve body, The idler wheel is articulated in the free end of the turning rolls, the valve block towards in the direction motion process of the block piece with When the idler wheel abuts, the idler wheel also rotates with the rotation of the valve block.

Further, the valve block is equipped with locating part, and the idler wheel is equipped with card slot, the card slot and the locating part Match, for the valve block towards in the direction motion process of the block piece, the locating part can be caught in the card slot It is interior, and can be slided along the card slot.

Further, the linking arm is equipped with flexible block, and the valve block turns to parallel with the axis of the valve body When, it is abutted with the flexible block.

Further, the driving device includes lead screw, nut and driving motor, and the nut thread is matched with the silk On bar, it is covered with shell outside the lead screw, the shell is embedded on the side wall of the valve body；Lead screw described in the shell upper edge Length direction be equipped with sliding slot, the nut stretches into the valve inner across the sliding slot and is connect with the linking arm, described When driving motor drives the lead screw rotation, the nut is slided along the sliding slot；The block piece is set on the shell.

Another of the utility model is designed to provide a kind of central cooking fume control equipment, including kitchen ventilator and it is above-mentioned only Valve is returned, the check-valves is communicated between the exhaust outlet of the kitchen ventilator and the gas outlet of common flue, the center fume purifying Equipment has all technique effects of above-mentioned check-valves.

The utility model check-valves and central cooking fume control equipment have the beneficial effect that：

Check-valves provided by the utility model and central cooking fume control equipment, wherein check-valves includes for being connected to oil smoke The valve body of machine and common flue changes the valve block of valve body connected state, for being drivingly connected arm edge for valve body block Valve body is axially moved the driving device to be moved synchronously with moving valve plate and changes valve block by driving valve block rotation and sealed to valve body The actuator of stifled state；Wherein, central cooking fume control equipment includes for aspirating the kitchen ventilator of kitchen fume, for conveying oil smoke Common flue and the check-valves for being connected to kitchen ventilator and common flue.

Common flue approximate atmospheric pressure of the gas in negative pressure state, kitchen under the swabbing action of exhausting system, When initial, valve block blocks valve body, when generating oil smoke in kitchen, controls the driving device, and driving device is drivingly connected arm Along being moved axially towards the direction for blocking end far from valve body for valve body, in motion process, actuator drives valve block to rotate, at valve body Pass through between kitchen ventilator, check-valves middle valve plate and valve body under the action of pressure difference in the oil smoke of connected state, kitchen side Gap enters in common flue, and is further transported to designated position and is handled；Wherein, linking arm moves downward distance and gets over Greatly, valve block rotational angle is bigger, and the circulation area of valve body is also bigger, until linking arm moves to certain position, valve block rotates 90 ° When parallel with the axis of valve body, the effective area of valve body circulated gases is maximum, and the ability that kitchen ventilator aspirates oil smoke is most strong, actuator Stop driving.

When kitchen no longer needs to aspirate oil smoke, controls the driving device and be drivingly connected arm towards the side for blocking end close to valve body To movement, during the motion, actuator driving valve block rotates backward or continues to rotate in same direction valve block, and driving valve block gradually restores Valve body is blocked completely to sealed condition until valve block reaches initial position, kitchen is no longer connected to common flue, with Reduce the occurrence of oil smoke recharge enters in kitchen in common flue.

Valve block realizes angular turn under the drive of linking arm, the driving effect of actuator, completes the closure control to valve body System, wherein linking arm, actuator are arranged at the inside of valve block, are not influenced on the block-up position of valve block and valve body, to Ensure that the sealing of valve block and valve body coordinates, the closure leakproofness to valve body is improved, correspondingly, reducing kitchen ventilator closed state When, the oil smoke recharge of common flue to kitchen and air-flow is flowed through in the gap between valve block and valve body causes phenomenon of uttering long and high-pitched sounds Occur.

Description of the drawings

It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art Specific implementation mode or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art Under the premise of labour, other drawings may also be obtained based on these drawings.

Fig. 1 is the first visual angle three-dimensional knot of the check-valves when valve block that provides of the utility model embodiment is in sealed condition Structure schematic diagram；

Fig. 2 is the second visual angle three-dimensional knot of the check-valves when valve block that provides of the utility model embodiment is in sealed condition Structure schematic diagram；

Fig. 3 is the first visual angle three-dimensional knot of the check-valves when valve block that the utility model embodiment provides does not block valve body Structure schematic diagram；

Fig. 4 is the second visual angle three-dimensional knot of the check-valves when valve block that the utility model embodiment provides does not block valve body Structure schematic diagram.

Icon：1- valve bodies；2- valve blocks；3- driving devices；4- linking arms；5- block pieces；6- locating parts；7- bullets Property block；8- articulated shafts；9- torsional springs；11- annular convex platform；12- convex ribs；21- annular grooves；22- engaging lugs；31- Bar；32- nuts；33- driving motors；34- shells；341- sliding slots；51- turning rolls；52- idler wheels；521- card slots.

Specific implementation mode

The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described Embodiment is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, originally The every other embodiment that field those of ordinary skill is obtained without making creative work, belongs to this practicality Novel protected range.

It is in the description of the present invention, it should be noted that term "center", "upper", "lower", "left", "right", " perpendicular Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only The utility model and simplifying describes for ease of description, do not indicate or imply the indicated device or element must have it is specific Orientation, with specific azimuth configuration and operation, therefore should not be understood as limiting the present invention.

In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally Connection；It can be mechanical connection, can also be electrical connection；Can be directly connected, can also indirectly connected through an intermediary, It can be the connection inside two elements.For the ordinary skill in the art, it can understand above-mentioned art with concrete condition The concrete meaning of language in the present invention.

The present embodiment provides a kind of check-valves, as Figure 1-Figure 4, including valve body 1 and valve block 2, valve body 1, which is equipped with, to be driven The driving end of dynamic device 3, driving device 3 is connected with linking arm 4, and valve block 2 and the free end of linking arm 4 are hinged, and driving device 3 is used In drive connection arm 4 along the axially reciprocating of valve body 1；The driving for driving valve block 2 to be rotated around hinged place is equipped in valve body 1 Part, during valve block 2 blocks end under the drive of linking arm 4 close to valve body 1, actuator drives valve block 2 to rotate, to valve body 1 It is blocked；During valve block 2 blocks end under the drive of linking arm 4 far from valve body 1, actuator drives valve block 2 to rotate, valve Body 1 is in circulation status.

The present embodiment also provides a kind of central cooking fume control equipment, including kitchen ventilator and above-mentioned check-valves, check-valves connection Between the exhaust outlet of kitchen ventilator and the gas outlet of common flue.

Check-valves provided in this embodiment and central cooking fume control equipment, wherein check-valves includes for being connected to kitchen ventilator Change the valve block 2 of 1 connected state of valve body, for being drivingly connected arm 4 with the valve body 1 of common flue, for valve body 1 block It is axially moved with the driving device 3 that is moved synchronously with moving valve plate 2 along valve body 1 and to change valve block 2 by driving valve block 2 to rotate right The actuator of 1 sealed condition of valve body；Wherein, central cooking fume control equipment includes for aspirating the kitchen ventilator of kitchen fume, being used for The common flue and the check-valves for being connected to kitchen ventilator and common flue for conveying oil smoke.

Common flue approximate atmospheric pressure of the gas in negative pressure state, kitchen under the swabbing action of exhausting system, When initial, as depicted in figs. 1 and 2, valve block 2 blocks valve body 1, when generating oil smoke in kitchen, controls the driving device 3, Driving device 3 is drivingly connected the moving axially towards the direction for blocking end far from valve body 1 along valve body 1 of arm 4, in motion process, drives Moving part drives valve block 2 to rotate, and valve body 1 be in connected state, the oil smoke of kitchen side pass through under the action of pressure difference kitchen ventilator, Gap between check-valves middle valve plate 2 and valve body 1 enters in common flue, and is further transported at designated position Reason；Wherein, linking arm 4 move downward distance it is bigger, 2 rotational angle of valve block is bigger, and the circulation area of valve body 1 is also bigger, until Linking arm 4 moves to certain position, when 90 ° of the rotation of valve block 2 is parallel with the axis of valve body 1, the effective area of 1 circulated gases of valve body Maximum, the ability that kitchen ventilator aspirates oil smoke is most strong, and actuator stops driving.

When kitchen no longer needs to aspirate oil smoke, controls the driving device 3 drive connection arms 4 and block end towards close to valve body 1 Direction movement, valve block 2 during the motion, actuator driving valve block 2 rotate backward or continue to rotate in same direction, drive valve block 2 It is gradually restored to sealed condition, until valve block 2 reaches initial position, valve body 1 is blocked completely, kitchen and common flue are not It is connected to again, to reduce the occurrence of oil smoke recharge enters in kitchen in common flue.

Valve block 2 realizes angular turn under the drive of linking arm 4, the driving effect of actuator, completes the closure to valve body 1 Control, wherein linking arm 4, actuator are arranged at the inside of valve block 2, to the block-up position of valve block 2 and valve body 1 without shadow It rings, so that it is guaranteed that valve block 2 and the sealing of valve body 1 coordinate, the closure leakproofness to valve body 1 is improved, correspondingly, reducing kitchen ventilator When closed state, the oil smoke recharge of common flue to kitchen and air-flow is flowed through in the gap between valve block 2 and valve body 1 to be caused The generation for phenomenon of uttering long and high-pitched sounds.

Specifically, in the present embodiment, as Figure 1-Figure 4, actuator may include block piece 5 and restoring piece, block piece 5 are set in valve body 1, during valve block 2 blocks end far from valve body 1, abut with block piece 5 and rotate around hinged place, valve Body 1 is in connected state；Restoring piece be set to valve block 2 on, valve block 2 close to valve body 1 block end during, restoring piece drive valve block 2 rotations reset, and are blocked to valve body 1.When generating oil smoke in kitchen, 3 are controlled the driving device, driving device 3 is drivingly connected Arm 4 is moved along valve body 1 axially towards the direction for blocking end far from valve body 1, and valve block 2 is under the drive of linking arm 4 towards close The direction of block piece 5 moves, and in motion process, side and the block piece 5 of valve block 2 are touched, and valve block 2 continues to move, and valve block 2 is hindering It rotates along valve block 2 and the hinged place of linking arm 4 under the blocking of block piece 5, restoring piece is in compressive state, such as Fig. 3 and Fig. 4 institutes Show, valve block 2 no longer blocks valve body 1, and valve body 1 is accordingly in connected state, and the oil smoke of kitchen side passes through under the action of pressure difference The gap crossed between kitchen ventilator, check-valves middle valve plate 2 and valve body 1 enters in common flue, and is further transported to specific bit It sets and is handled；Wherein, linking arm 4 move downward distance it is bigger, 2 rotational angle of valve block is bigger, and the circulation area of valve body 1 is also got over Greatly, the compression that restoring piece is subject to is stronger, until linking arm 4 moves to certain position, valve block 2 rotates 90 ° and the axis of valve body 1 is put down When row, the effective area of 1 circulated gases of valve body is maximum, and the ability that kitchen ventilator aspirates oil smoke is most strong, and driving device 3 stops driving.

When kitchen no longer needs to aspirate oil smoke, controls the driving device 3 drive connection arms 4 and moved towards negative direction, valve block 2 During the motion, block piece 5 is more and more weaker to the blocking of valve block 2, and restoring piece exerts a force to valve block 2, and driving valve block 2 gradually restores To sealed condition, until valve block 2 reaches initial position, it is detached from block piece 5, under the action of restoring piece, valve block 2 is restored to initially Position blocks valve body 1 completely, and kitchen is no longer connected to common flue, is entered with reducing oil smoke recharge in common flue The occurrence of in kitchen.

Valve block 2 realizes angular turn under the drive, the blocking of block piece 5 and the restitution of restoring piece of linking arm 4, It completes the closure to valve body 1 to control, wherein linking arm 4, restoring piece are arranged at the inside of valve block 2, and block piece 5 is arranged in valve Inside body 1, the block-up position of valve block 2 and valve body 1 is not influenced, so that it is guaranteed that valve block 2 and the sealing of valve body 1 coordinate, is carried Height is to the closure leakproofness of valve body 1, correspondingly, when reducing kitchen ventilator closed state, the oil smoke recharge of common flue to kitchen And the generation for the phenomenon that causes to utter long and high-pitched sounds is flowed through in gap of the air-flow between valve block 2 and valve body 1.

It is driven specifically, gear, rack gearing, push-rod electric machine, lead screw 31, nut 32 may be used in driving device 3 Device and cylinder etc. can be drivingly connected the device of the linear motion of arm 4；Restoring piece can select torsional spring 9, elastic string etc..

In the present embodiment, as Figure 1-Figure 4, annular convex platform 11 can be equipped on the inner wall of valve body 1, valve block 2 is to valve When body 1 blocks, abutted with annular convex platform 11.When sealed condition, 2 outer surface of valve block and the inner surface of annular convex platform 11 closely support It connects, valve block 2 is collectively formed closeouts with annular convex platform 11 and is blocked to valve body 1, compares the edge and 1 inner wall of valve body of valve block 2 Sealing cooperation, 2 outer surface of valve block and the close abutting contact area of inner surface of annular convex platform 11 are big, and leakproofness is preferable, while right The requirement of valve block 2 is relatively low.

In the present embodiment, as shown in Figure 3 and Figure 4, the convex ribs 12 of concentric, convex ribs can also be equipped on annular convex platform 11 12 protrusion annular convex platform 11 are equipped with annular groove 21, annular groove 21 and 12 phase of convex ribs close to the end face of 2 side of valve block, valve block 2 Match, when valve block 2 blocks valve body 1, convex ribs 12 are embedded in annular groove 21；Further, it can also be inlayed in annular groove 21 There is sealing ring, when valve block 2 blocks valve body 1, convex ribs 12 are closely abutted with sealing ring.It is convex when valve block 2 blocks valve body 1 Muscle 12 is embedded into the annular groove 21 on valve block 2, and is closely abutted with the sealing ring in annular groove 21, and sealing ring is squeezed hair Raw deformation, the gap between convex ribs 12 and annular groove 21 is further filled, to improve between convex ribs 12 and annular groove 21 Leakproofness improves the leakproofness that valve block 2 blocks valve body 1.

Specifically, in the present embodiment, as shown in Figure 1, Figure 2 and Figure 4, block piece 5 may include turning rolls 51 and idler wheel 52, Turning rolls 51 is fixedly arranged on the inner wall of valve body 1, and idler wheel 52 is articulated in the free end of turning rolls 51, and valve block 2 is towards close to block piece 5 Direction motion process in when being abutted with idler wheel 52, idler wheel 52 also rotates with the rotation of valve block 2.Valve block 2 is along 1 axis of valve body When to close to block piece 5,52 one side of idler wheel plays barrier effect to valve block 2, and valve block 2 is abutted with idler wheel 52, in idler wheel 52 Effect issues raw angular turn；On the other hand, include being axially moved along valve body 1 and rotating two along hinged place when valve block 2 moves Movement, therefore, can occur relative motion, idler wheel 52 rotates, Ke Yiyou with the rotation of valve block 2 between valve block 2 and idler wheel 52 Effect reduces the relative friction between 2 rotation process of valve block and idler wheel 52, is ensuring under the barrier effect of valve block 2, improving valve block 2 The smooth degree of rotation.

In the present embodiment, as Figure 1-Figure 4, locating part 6 can also be equipped on valve block 2, idler wheel 52 is equipped with card slot 521, card slot 521 matches with locating part 6, and towards in the direction motion process of block piece 5, locating part 6 can block valve block 2 Enter in card slot 521, and can be slided along card slot 521.Valve block 2 along valve body 1 axially adjacent to block piece 5 when, locating part 6 is caught in rolling In the card slot 521 of wheel 52, which and is passed to valve block 2 by locating part 6 by the barrier effect of idler wheel 52, and valve block 2 is sent out therewith Raw rotation, locating part 6 is driven to be axially moved along valve body 1 for valve block 2 and along during hinged place rotates, locating part 6 is stuck in always In the card slot 521,521 position of card slot is constant, to limit the movement locus of locating part 6 and valve block 2, to reduce the movement of valve block 2 It shifts in the process, and influences valve block 2 to the control of 1 sealed condition of valve body and between valve body 1 the occurrence of leakproofness.

In the present embodiment, as shown in Figure 1-Figure 3, flexible block 7 can be equipped on linking arm 4, valve block 2 turn to When the axis of valve body 1 is parallel, abutted with flexible block 7.Valve block 2 from sealed condition around hinged place rotate during, with turn The increase of dynamic angle, the gap between valve block 2 and valve body 1 are increasing, that is, and the available ventilation area of valve body 1 becomes larger, when When valve block 2 turns to parallel with the axis of valve body 1, valve block 2 is abutted with the flexible block 7 on linking arm 4, and valve body 1 has at this time For effect by area maximum, the detergent power of kitchen ventilator is most strong, and driving device 3 stops driving, and the oil smoke in kitchen passes through oil smoke successively Gap between machine, check-valves middle valve plate 2 and valve body 1 enters common flue, completes the purification to kitchen fume.Flexible block 7 Setting, on the one hand the maximum rotation angle of valve block 2 can be limited, convenient for turning to 1 draught area of valve body to valve block 2 The control of maximum position；On the other hand, with the valve block 2 in rotation rigid collision will not occur for elastic block, in realization pair On the basis of valve block 2 abuts limit, reduce damage of the rigid collision to valve block 2.

Specifically, in the present embodiment, as shown in Figure 2 and Figure 4, driving device 3 may include lead screw 31, nut 32 and driving Motor 33,32 screw-thread fit of nut are covered with shell 34, shell 34 is embedded in the side wall of valve body 1 on lead screw 31 outside lead screw 31 On；The length direction of 34 upper edge lead screw 31 of shell is equipped with sliding slot 341, and nut 32 stretches into 1 inside of valve body and connect across sliding slot 341 Arm 4 connects, and when driving motor 33 drives lead screw 31 to rotate, nut 32 is slided along sliding slot 341；Block piece 5 is set on shell 34.This In be driving device 3 a kind of concrete form, need change check-valves sealed condition when, open driving motor 33, driving motor 33 driving lead screws 31 rotate, in the threaded connection of nut 32 and lead screw 31, and under the limitation of 34 upper hopper chute 341 of shell, Zhi Nengyan The length direction for sliding slot 341 and lead screw 31 moves back and forth, and valve block 2, linking arm 4 are accordingly moved synchronously with nut 32, realizes To the control that valve block 2 is axially moved along valve body 1, and then realize that the rotation of valve block 2 changes the sealed condition to valve body 1.

Specifically, in the present embodiment, as depicted in figs. 1 and 2, engaging lug 22 can be equipped on valve block 2, engaging lug 22 with Linking arm 4 is hinged by articulated shaft 8；Restoring piece includes torsional spring 9, and torsional spring 9 is sheathed on articulated shaft 8, and for being drivingly connected ear 22 band moving valve plates 2 are restored to sealed condition.Hair piece is articulated with one end of linking arm 4, the setting of engaging lug 22 by engaging lug 22 Can reduce and directly be articulated with valve block 2, and valve block 2 with respect to hinged place rotate the damage to valve block 2 and to valve block 2 seal The destruction of property.Restoring piece includes torsional spring 9, and when initial, torsional spring 9 drives valve block 2 to be in sealed condition, when valve block 2 rotates, only It returns valve to open, torsional spring 9 is deformed upon by active force, applies valve block 2 active force of a recovery initial position, but the power is small In block piece 5 to the support force of valve block 2；When valve block 2 is moved away from the position of block piece 5, block piece 5 is to valve block 2 Support force is gradually reduced, and torsional spring 9 drives valve block 2 to be gradually restored to sealed condition, until valve block 2 is detached from block piece 5, torsional spring 9 drives Moving valve plate 2 is in sealed condition.

Finally it should be noted that：Above example is only to illustrate the technical solution of the utility model, rather than its limitations； Although the utility model is described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that： It can still modify to the technical solution recorded in previous embodiment, either to which part or all technical features Carry out equivalent replacement；And these modifications or replacements, the utility model embodiment that it does not separate the essence of the corresponding technical solution The range of technical solution.

Claims (10)

1. a kind of check-valves, which is characterized in that including valve body (1) and valve block (2), the valve body (1) is equipped with driving device (3), the driving end of the driving device (3) is connected with linking arm (4), the free end of the valve block (2) and the linking arm (4) Hinged, the driving device (3) is for driving the linking arm (4) along the axially reciprocating of the valve body (1)；

The actuator for driving the valve block (2) to be rotated around hinged place is equipped in the valve body (1), the valve block (2) is in institute It states under the drive of linking arm (4) during the close valve body (1) closure end, the actuator drives the valve block (2) to turn It is dynamic, the valve body (1) is blocked；The valve block (2) is sealed under the drive of the linking arm (4) far from the valve body (1) During stifled end, the actuator drives valve block (2) rotation, the valve body (1) to be in connected state.

2. check-valves according to claim 1, which is characterized in that the actuator includes block piece (5) and restoring piece, institute Block piece (5) is stated in the valve body (1), it is and described during the valve block (2) blocks end far from the valve body (1) Block piece (5) is abutted and is rotated around hinged place, and the valve body (1) is in connected state；The restoring piece is set to the valve On piece (2), during the close valve body (1) of the valve block (2) blocks end, the restoring piece drives the valve block (2) to turn It is dynamic to reset, the valve body (1) is blocked.

3. check-valves according to claim 2, which is characterized in that the inner wall of the valve body (1) is equipped with annular convex platform (11), it when the valve block (2) blocks the valve body (1), is abutted with the annular convex platform (11).

4. check-valves according to claim 3, which is characterized in that the annular convex platform (11) is equipped with the convex ribs of concentric (12), the convex ribs (12) protrude the annular convex platform (11) on the end face of the valve block (2) side, the valve block (2) Equipped with annular groove (21), the annular groove (21) matches with the convex ribs (12), and the valve block (2) seals the valve body (1) When stifled, the convex ribs (12) are embedded in the annular groove (21).

5. check-valves according to claim 4, which is characterized in that it is inlaid with sealing ring in the annular groove (21), it is described When valve block (2) blocks the valve body (1), the convex ribs (12) closely abut with the sealing ring.

6. according to the check-valves described in any one of claim 2-5, which is characterized in that the block piece (5) includes turning rolls (51) it is fixedly arranged on the inner wall of the valve body (1) with idler wheel (52), the turning rolls (51), the idler wheel (52) is articulated in described The free end of turning rolls (51), the valve block (2) towards close to the block piece (5) direction motion process in the idler wheel (52) when abutting, the idler wheel (52) also rotates with the rotation of the valve block (2).

7. check-valves according to claim 6, which is characterized in that the valve block (2) is equipped with locating part (6), the rolling It takes turns (52) and is equipped with card slot (521), the card slot (521) matches with the locating part (6), and the valve block (2) is towards close In the direction motion process of the block piece (5), the locating part (6) can be caught in the card slot (521), and can be along Card slot (521) sliding.

8. check-valves according to any one of claims 1-5, which is characterized in that the linking arm (4) is equipped with elasticity Block (7) abuts when the valve block (2) turns to parallel with the axis of the valve body (1) with the flexible block (7).

9. according to the check-valves described in any one of claim 2-5, which is characterized in that the driving device (3) includes lead screw (31), nut (32) and driving motor (33), nut (32) screw-thread fit is on the lead screw (31), the lead screw (31) It is covered with shell (34) outside, the shell (34) is embedded on the side wall of the valve body (1)；

The length direction of lead screw (31) described in shell (34) upper edge is equipped with sliding slot (341), and the nut (32) passes through described Sliding slot (341) is stretched into inside the valve body (1) and is connect with the linking arm (4), and the driving motor (33) drives the lead screw (31) when rotating, the nut (32) is slided along the sliding slot (341)；The block piece (5) is set on the shell (34).

10. a kind of center cooking fume control equipment, which is characterized in that described in any one of kitchen ventilator and claim 1-9 Check-valves, the check-valves are communicated between the exhaust outlet of the kitchen ventilator and the gas outlet of common flue.