CN113757393B - Protective valve - Google Patents

Protective valve Download PDF

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Publication number
CN113757393B
CN113757393B CN202010494331.0A CN202010494331A CN113757393B CN 113757393 B CN113757393 B CN 113757393B CN 202010494331 A CN202010494331 A CN 202010494331A CN 113757393 B CN113757393 B CN 113757393B
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CN
China
Prior art keywords
vanes
shaft
valve
closed position
vane
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202010494331.0A
Other languages
Chinese (zh)
Other versions
CN113757393A (en
Inventor
袁林
孙慧敏
刘卫岳
魏彦超
王志强
祁飞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
York Guangzhou Air Conditioning and Refrigeration Co Ltd
Johnson Controls Technology Co
Original Assignee
York Guangzhou Air Conditioning and Refrigeration Co Ltd
Johnson Controls Technology Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by York Guangzhou Air Conditioning and Refrigeration Co Ltd, Johnson Controls Technology Co filed Critical York Guangzhou Air Conditioning and Refrigeration Co Ltd
Priority to CN202010494331.0A priority Critical patent/CN113757393B/en
Publication of CN113757393A publication Critical patent/CN113757393A/en
Application granted granted Critical
Publication of CN113757393B publication Critical patent/CN113757393B/en
Active legal-status Critical Current
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/16Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
    • F16K1/18Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
    • F16K1/22Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
    • F16K1/223Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves with a plurality of valve members
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/16Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
    • F16K1/18Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
    • F16K1/22Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
    • F16K1/224Details of bearings for the axis of rotation
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32Details
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32Details
    • F16K1/50Preventing rotation of valve members
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/36Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position
    • F16K17/363Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position the closure members being rotatable or pivoting

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air-Flow Control Members (AREA)
  • Mechanically-Actuated Valves (AREA)

Abstract

The application discloses a protection valve, comprising: a frame; a plurality of vanes, said vanes having an open position and a closed position, each of said vanes having a rotational axis, and each of said vanes being rotatable about the axis of the respective rotational axis between its open and closed positions; a plurality of elastic means provided respectively corresponding to the rotation shafts of the plurality of blades, the plurality of elastic means being configured to be capable of applying torque to the respective rotation shafts to rotate the respective blades in the opening direction, respectively. The protection valve can be installed on a wall or in a pipeline through the frame, is flexible in installation mode, can ensure the ventilation effect of the inner side and the outer side when being opened, and can be rapidly closed when encountering air flow with larger impact force so as to block the air flow. The protection valve is simple and reliable in structure, and can be automatically closed without an external power supply device, a sensor and the like.

Description

Protective valve
Technical Field
The application relates to the field of ventilation valves, in particular to a protection valve with a protection function.
Background
Some devices have a need to be vented to the outside when in use. In some cases, however, the external environment may create high impact airflows, such as blast airflows, which may affect or interfere with the equipment inside.
Disclosure of Invention
The application aims to provide a protective valve which can ensure the ventilation effect of the inner side and the outer side when being opened and can be quickly closed when encountering air flow with larger impact force so as to block the air flow.
In order to achieve the above object, at least one object of the present application is to provide a protection valve comprising: a frame having opposite first and second sides; a plurality of vanes, each vane disposed between the first and second sides, the vanes having an open position and a closed position, wherein each vane has a rotational axis supported by the first and second sides, and each vane is rotatable about an axis of the respective rotational axis between its open and closed positions, and wherein the plurality of vanes are configured to form a fluid passageway between adjacent vanes in their open position, and wherein adjacent vanes abut one another in their closed position, thereby enabling disconnection of the fluid passageway; the protection valve further comprises: a plurality of elastic means provided on the outer side wall of the first side portion respectively corresponding to the rotation shafts of the plurality of blades, the plurality of elastic means being configured to be capable of applying torque to the respective rotation shafts to rotate the respective blades in the opening direction, respectively.
According to the above, the protection valve further includes a plurality of first stoppers provided on an inner sidewall of at least one of the first side portion and the second side portion, respectively corresponding to the open positions of the plurality of vanes, the plurality of first stoppers being positioned to restrict the vanes from rotating in the open direction when the vanes are in the open positions.
According to the above, the protection valve further comprises a plurality of connecting arms respectively connected to one ends of the plurality of rotating shafts and intersecting the rotating shafts, and the rotating shafts can drive the connecting arms to move when rotating; the plurality of elastic means have first ends connected to the first side of the frame and second ends connected to the respective connecting arms, the elastic means being configured to be able to apply the torque to the rotating shaft through the connecting arms.
According to the above, the protection valve further comprises a connection sleeve, the connection sleeve is sleeved at the one end of the rotating shaft, and the connection arm is connected to the rotating shaft through the connection sleeve.
According to the above, the protection valve further comprises a connecting rod, the connecting rod is connected to the plurality of connecting arms, and the connecting arms can be driven to move by moving.
According to the above, the protection valve further comprises a locking device configured to lock the plurality of vanes in the closed position of the vanes.
According to the above, the protection valve further includes a support shaft connected to an outer sidewall of the first side portion of the frame; wherein the locking device comprises a linkage mechanism comprising a first rod portion, a second rod portion and a third rod portion, and a first link shaft and a second link shaft, wherein a first end of the first rod portion is connected to the rotation shaft, a second end of the first rod portion is rotatably connected with a first end of the second rod portion through the first link shaft, a second end of the second rod portion is rotatably connected with a first end of the third rod portion through the second link shaft, and a second end of the third rod portion is rotatably connected to the support shaft; wherein the second and third lever portions form an elbow joint structure which rotates about the second link shaft between its open and closed positions, and wherein the blade is also in its open position when the elbow joint structure is in its open position and the blade is also in its closed position when the elbow joint structure is in its closed position.
In accordance with the above, the guard valve further comprises a second stop, wherein the elbow structure and the second stop are configured such that when the elbow structure is in its closed position, the third stem contacts the second stop to block continued rotation of the elbow structure, wherein an obtuse angle is formed between the third stem and the second stem.
According to the above, the second stopper is provided on the second lever portion, and the second stopper is configured to be able to contact the inside of the third lever portion.
According to the above, the second stopper is provided on the outer side wall of the first side portion of the frame, the second stopper being configured to be able to contact the outer side of the third lever portion.
According to the above, the locking device includes: the ratchet wheel is connected to one end of the rotating shaft and can rotate along with the rotating shaft, wherein the ratchet wheel is provided with helical teeth and tooth grooves, and the tooth grooves are arranged between adjacent helical teeth; a pawl rotatably coupled to an outer sidewall of the first side portion of the frame, wherein the pawl is inserted into a tooth slot of the ratchet; the ratchet and the pawl are configured to restrict rotation of the rotation shaft in the opening direction of the blade.
According to the above, the protection valve further includes a plurality of third stoppers provided on an inner sidewall of at least one of the first side portion and the second side portion, respectively corresponding to the closed positions of the plurality of vanes, the plurality of third stoppers being positioned to restrict the vanes from rotating in the closing direction when the vanes are in the closed positions.
According to the above, the plurality of elastic means are configured to be able to apply torque for rotating the respective blade in the closing direction to the respective rotation shaft via the connection arm, respectively, to lock the respective blade in the closing position of the blade with the respective third stopper.
According to the above, the elastic means is configured such that the directions of the torque applied to the rotation shaft by the elastic means are located on both sides of the center line of the connection arm, respectively, when the blade is in its open position and its closed position.
According to the above, the elastic means are configured to exert a pulling force on the rotation shaft smaller than a preset threshold force when the blade is in its open position.
Drawings
Fig. 1A and 1B are perspective structural views of a barrier valve 100 according to an embodiment of the present application in an open state, at two viewing angles;
FIG. 1C is a front view of the guard valve 100 of FIG. 1A;
FIG. 1D is a cross-sectional view of the guard valve 100 of FIG. 1C taken along line A-A;
fig. 2A and 2B are perspective structural views of the barrier valve 100 of fig. 1A and 1B in two views when in a closed state;
FIG. 2C is a front view of the guard valve 100 shown in FIG. 2A;
FIG. 2D is a cross-sectional view of the guard valve 100 of FIG. 2C along line B-B;
FIG. 3A is a perspective view of the components outside of the right side 103 of the frame 101 of the guard valve 100 of FIG. 1A;
FIG. 3B is an exploded view of FIG. 3A;
fig. 4A and 4B illustrate the relative positions and mating relationship of the respective vanes 110, springs 118, and locking means 117 when the guard valve 100 of fig. 1A is in an open state;
FIGS. 5A and 5B illustrate the relative positions and mating relationship of the respective vanes 110, springs 118, and locking means 117 when the guard valve 100 of FIG. 1A is in a closed state;
fig. 6 is a right side view of a barrier valve 600 according to a second embodiment of the present application in a closed state;
fig. 7 is a right side view of a barrier valve 700 according to a third embodiment of the present application in an open state;
fig. 8A is a right side view of a guard valve 800 according to a fourth embodiment of the present application in an open state;
fig. 8B is a right side view of the guard valve 800 shown in fig. 8A in a closed state.
Detailed Description
Various embodiments of the present application are described below with reference to the accompanying drawings, which form a part hereof. It is to be understood that, although directional terms, such as "front", "rear", "upper", "lower", "left", "right", "top", "bottom", etc., may be used in the present application to describe various example structural portions and elements of the present application, these terms are used herein for convenience of description only and are determined based on the example orientations shown in the drawings. Since the disclosed embodiments of the application may be arranged in a variety of orientations, these directional terms are used by way of illustration only and are in no way limiting.
Fig. 1A to 1D show structural diagrams of the barrier valve 100 in an open state according to an embodiment of the present application, wherein fig. 1A and 1B show perspective structural diagrams of the barrier valve 100 at two angles of view of a front side and a rear side, fig. 1C shows a front view of the barrier valve 100, and fig. 1D shows a right side view of the barrier valve 100.
As shown in fig. 1A-1D, the guard valve 100 includes a generally square frame 101, the frame 101 including oppositely disposed top and bottom portions 102, 107, and oppositely disposed left and right side portions 104, 103. A fluid passage 120 can be formed between the front and rear sides of the frame 101. The edges of the top 102, bottom 107, left 104 and right 103 sides of the protection valve 100 may each have a connecting edge 181, by means of which connecting edge 181 the protection valve 100 may be fixedly connected, for example by connecting the protection valve 100 in a pipe or at a wall of a box or the like. As one example, the front side of the frame 101 forms the inlet 105 of the fluid channel 120 and the rear side of the frame 101 forms the outlet 106 of the fluid channel 120.
The guard valve 100 further includes a plurality of vanes 110, the plurality of vanes 110 being connected in the fluid passage 120 and rotatably supported on the left and right sides 104 and 103 of the frame 101. As an example, each of the blades 110 includes a rotation shaft 111, an upper blade 113 and a lower blade 114, the top ends of the upper blade 113 and the lower blade 114 being connected to the rotation shaft 111, and the bottom ends thereof being connected to each other. The rotation shaft 111 is supported on the left and right sides 104 and 103 of the frame 101. When the rotation shaft 111 rotates about its axis, the rotation shaft 111 can rotate the upper blade 113 and the lower blade 114 together. As the rotation shaft 111 rotates, the vane 110 can have an open position in which the fluid passage 120 can be opened and a closed position in which the fluid passage 120 can be closed, of the vane 110. In the embodiment shown in fig. 1A-1D, each vane 110 is generally in an inclined condition when the vanes 110 are rotated to their open positions, with adjacent lower and upper vanes 114, 113 being spaced apart a distance for airflow. Also, a distance for the passage of air is also provided between the upper blade 113 of the uppermost blade 110 and the top 102 of the frame 101, and between the lower blade 114 of the lowermost blade 110 and the bottom 107 of the frame 101, so that the fluid passage 120 is opened and the outside air can flow from the inlet 105 to the outlet 106.
The guard valve 100 further includes a plurality of open position limiters 115 (i.e., first limiters 115) and a plurality of closed position limiters 116 (i.e., third limiters 116) for limiting the vane 110. A plurality of open position stoppers 115 are provided on an inner sidewall of at least one of the left and right sides 104 and 103 of the frame 101, and as an example, the open position stoppers 115 are provided on inner sidewalls of both the left and right sides 104 and 103. The number of open position limiters 115 on each inner sidewall corresponds to the number of vanes 110. Similarly, a plurality of closing position stoppers 116 are also provided on the inner side wall of at least one of the left and right side portions 104 and 103 of the frame 101, and as one example, the closing position stoppers 116 are also provided on both the left and right side portions 104 and 103. And the number of closed position limiters 116 on each inner sidewall also corresponds to the number of vanes 110.
When the barrier valve 100 is in the open state, the vanes 110 are in their open position, the open position limiter 115 can be used to contact the upper vane 113 of each vane 110 to block the upward rotation of the vane 110 (i.e., counterclockwise rotation at the angle shown in fig. 1D), and the closed position limiter 116 is spaced a distance from the lower vane 114 of the corresponding vane 110 so as not to block the downward rotation of the vane 110 (i.e., clockwise rotation at the angle shown in fig. 1D). That is, when the blade 110 is in its open position, the blade 110 can only rotate downward but cannot rotate upward.
As also shown in fig. 1A-1D, the guard valve 100 further comprises a connecting rod 119, a locking means 117 and several elastic means, which are arranged outside the right side 103 of the frame 101. In this embodiment, the elastic means is a spring 118. The end 109 of the rotational shaft 111 of each blade 110 passes through and protrudes beyond the right side 103. The end 109 of each rotation shaft 111 that passes out of the right side 103 is connected to a connecting rod 119 so that each blade 110 can be rotated synchronously. The locking means 117 is connected to said end 109 of the rotation shaft 111 of one of the blades 110, and can lock the other blade 110 by locking the unidirectional rotation of one of the blades 110 when the blade 110 is rotated to a certain angle. In the present embodiment, the locking means 117 is connected to the rotation shaft 111 of the uppermost blade 110, and in other examples, the locking means 117 may be connected to other rotation shafts 111. A plurality of springs 118 are provided corresponding to the plurality of blades 110, and one end of each spring 118 is fixed to the right side 103 and the other end is connected to the end 109 of the rotation shaft 111 of each blade 110. In the embodiment shown in fig. 1A, each spring 118 is in a slightly stretched state to apply a pulling force to the rotation axis 111 of the corresponding blade 110 that is less than a preset threshold force, which generates a torque for rotating the blade 110 upward (i.e., counterclockwise at the angle shown in fig. 1D). In the state shown in fig. 1A to 1D, the vane 110 is blocked by the open position limiter 115 from continuing to rotate upward, and the locking device 117 does not lock the rotation shaft 111. The blade 110 can be held in its open position by the combination of the spring 118 and the open position limiter 115. The specific construction of the locking means 117 and springs 118 of the guard valve 100 outside the right side 103 of the frame 101 will be further described in connection with fig. 3A and 3B.
Fig. 2A to 2D show structural views of the barrier valve 100 in a closed state, wherein fig. 2A and 2B show perspective structural views of the barrier valve 100 from both front and rear sides, fig. 2C shows a front view of the barrier valve 100, and fig. 2D shows a right side view of the barrier valve 100.
As shown in fig. 2A-2D, when the vanes 110 are rotated to their closed positions, each vane 110 is in a generally vertical position, the lower end of each vane 110 abuts against the upper end of an adjacent vane 110 or against a stop 161 on the bottom 107 of the frame 101, and the upper end of the uppermost vane 110 abuts against the top 102 of the frame 101 to block the passage of air flow, thereby closing the fluid passage 120, i.e., ambient air flow cannot pass from the inlet 105 to the outlet 106.
When the barrier valve 100 is in the closed state as shown in fig. 2A-2D, the vanes 110 are in their closed positions, the lower vane 114 of each vane 110 abuts against the closed position limiter 116 to block the downward rotation of the vane 110 (i.e., clockwise rotation at the angle shown in fig. 2D), and the open position limiter 115 is spaced a distance from the upper vane 113 of the corresponding vane 110 so as not to block the upward rotation of the vane 110 (i.e., counterclockwise rotation at the angle shown in fig. 2D). That is, when the vane 110 is in its closed position, the vane 110 can only rotate upward and cannot rotate downward.
In the closed state of the guard valve 100 as shown in fig. 2A-2D, the springs 118 remain in tension to continue to apply a pulling force to the respective vane 110 that generates a torque for rotating the vane 110 upward (i.e., the vane 110 rotates toward its open position). In the state shown in fig. 2A to 2D, the locking means 117 locks the rotation shaft 111 of the blade 110, i.e., the locking means 117 can prevent the blade 110 from rotating upward. The vane 110 can be held in its closed position by the combination of the closed position limiter 116, the spring 118 and the locking means 117. In some embodiments, since the spring 118 maintains a torque applied to the blade 110 that rotates the blade 110 upward, the blade 110 may be maintained in its closed position by the combined action of the locking device 117 and the spring 118 without the need for the closed position limiter 116.
The external configuration of the right side 103 of the frame 101 is shown in fig. 3A-3B to illustrate the specific configuration of the locking means 117, springs 118, and connecting rods 119. Fig. 3B is an exploded view of fig. 3A. As shown in fig. 3A and 3B, the protection valve 100 further includes a first fixing base 321 and a plurality of second fixing bases 322, wherein the first fixing base 321 is disposed at the left side of the second fixing base 322 and is disposed on the outer sidewall near the right side 103 of the top 102. The end 109 of each rotation shaft 111 passes through the second fixing base 322 and is supported thereon.
The protection valve 100 further includes a plurality of connecting sleeves 324 and a plurality of connecting arms 323, and the connecting sleeves 324, the connecting arms 323 and the blades 110 are correspondingly arranged. Each connecting sleeve 324 has a shaft hole 334 through which the rotation shaft 111 passes, and the connecting sleeve 324 can be coupled to the end 109 of the rotation shaft 111 of the corresponding blade 110 through the shaft hole 334. One end of each connecting arm 323 is connected to a corresponding connecting sleeve 324 and is connected to the rotation shaft 111 through the connecting sleeve 324 such that rotation of the rotation shaft 111 moves the corresponding connecting sleeve 324 and connecting arm 323. A connecting shaft 312 is provided on each connecting arm 323 on the opposite side to the connecting sleeve 324. The connection rod 119 connects the respective connection shafts 312 to connect with the end 109 of the respective rotation shafts 111 through the respective connection shafts 312. Spring 118 has a first end 343 and a second end 344, the first end 343 being connected to connecting shaft 312 and the second end 344 being secured to the outer side wall of right side 103 of frame 101 by a pull ring 331. As a specific example, the connection shaft 312 passes through the connection arm 323 and extends substantially in a direction parallel to the axis of the rotation shaft 111, the connection rod 119 is connected to the outside of the connection shaft 312, and the first end 343 of the spring 118 is connected to the inside of the connection shaft 312. In the present embodiment, the connection shaft 312 and the connection sleeve 324 are respectively connected to opposite sides of the connection arm 323 such that the first end 343 of the spring 118 is spaced apart from the rotation shaft 111 by a certain distance, so that a tangential force for rotating the rotation shaft 111 can be applied to the rotation shaft 111 when the spring 118 is elongated.
The first fixing base 321 is provided with a supporting shaft 341, the supporting shaft 341 is fixed, and an axis of the supporting shaft 341 is substantially parallel to an axis of the rotating shaft 111. The locking device 117 is connected between the supporting shaft 341 and the end 109 of the rotation shaft 111, and when the vane 110 is rotated to its closed position, the rotation shaft 111 is rotated to a specific locking position, and the locking device 117 can lock the rotation shaft 111 to prevent the rotation shaft 111 from being rotated in the opening direction of the vane. In the present embodiment, the locking device 117 includes a link mechanism 325, and the link mechanism 325 includes a first lever 326, a second lever 327, and a third lever 328, the first lever 326 being connected to the end 109 of the rotation shaft 111, the third lever 328 being connected to the supporting shaft 341, the second lever 327 being connected between the first lever 326 and the third lever 328. The linkage 325 further includes a first link shaft 336 and a second link shaft 337, the axes of the first link shaft 336 and the second link shaft 337 being substantially parallel and each disposed parallel to the axis of the rotary shaft 111. Specifically, a shaft hole 333 is provided on the right end of the first lever 326, and the first lever 326 is fixedly connected to the end 109 of the rotation shaft 111 through the shaft hole 333, so that the rotation shaft 111 rotates to rotate the first lever 326. The left end of the first lever 326 and the right end of the second lever 327 are rotatably connected by a first link shaft 336. The left end of the second shaft portion 327 and the right end of the third shaft portion 328 are rotatably connected by a second link shaft 337. The left end of the third lever 328 is rotatably connected to the supporting shaft 341. Thus, the second lever portion 327 can rotate about either the first lever shaft 336 or the second lever shaft 337. And the third lever 328 is rotatable about either the second link shaft 337 or the supporting shaft 341.
In this embodiment, the second and third bars 327 and 328 are capable of forming an elbow joint structure, rotating about the second link shaft 337 between their open and closed positions. The open and closed positions of the elbow structure correspond to the open and closed positions of the blade 110, respectively. As also shown in fig. 3A and 3B, a notch 362 is provided at the right end of the third lever portion 328 near the second link shaft 337, and the notch 362 is formed to be recessed downward from one side edge of the third lever portion 328. The guard valve 100 further includes an elbow stop 329, the elbow stop 329 being disposed on the left end of the second shaft portion 327 proximate the second link shaft 337. In this embodiment, the elbow stop 329 is a tab extending outwardly from the edge of the second shaft 327 on the same side as the third shaft 328. When the elbow stop 329 contacts the bottom of the gap 362, the second rod 327 and the third rod 328 cannot continue to rotate about the second rod axis 337 in opposite directions. The specific locking principle of the locking means 117 will be described in detail in connection with fig. 4A and 4B.
It should be noted that, the specific structure of one embodiment of the locking device is shown above, and in other embodiments, the locking device may not include a link mechanism, but may be other types of locking devices, as long as the blade is prevented from rotating in the opening direction when the blade rotates to the closed position.
Fig. 4A and 4B illustrate the relative positions and mating relationship of the respective vanes 110, springs 118, and locking means 117 when the guard valve 100 is in an open state. Fig. 5A and 5B illustrate the relative positions and mating relationship of the respective vanes 110, springs 118, and locking means 117 when the guard valve is in the closed condition. Fig. 4B is a partially enlarged structural view of fig. 4A, and fig. 5B is a partially enlarged structural view of fig. 5A.
As shown in fig. 4A and 4B, the guard valve 100 is in an open state, and each vane 110 is in a respective open position. The fluid passage 120 in the guard valve 100 is open such that the inlet 105 and the outlet 106 are in fluid communication. Each spring 118 is slightly stretched to apply a tangential force F to the corresponding rotation shaft 111 via the respective connecting arm 323 4 Tangential force F 4 A torque is generated to rotate the rotation shaft 111 and the blades 110 clockwise, but the corresponding blades 110 cannot be rotated clockwise by the open position limiter 115. Each blade 110 is thus held in its open position. In the present embodiment, the spring 118 applies a tangential force F to the rotation shaft 111 4 Less than a preset threshold force.
In the state shown in fig. 4A and 4B, the first lever 326 and the third lever 328 of the lock device 117 are each in a position in which the respective right ends are lifted upward, and the third lever 328 is located above the first lever 326. The left end of the second rod portion 327 is lifted upward to be connected to the right end of the third rod portion 328, and the right end thereof is sunk to be connected to the left end of the first rod portion 326. The elbow structure is in its open position with the third shaft 328 and the second shaft 327 forming an upwardly arched included angle alpha.
When the protection valve 100 receives the impact force F 1 Impact force F when the air flow impacts 1 Generating a component force F along the upper blade 113 on the upper blade 113 of each blade 110 2 And a component F perpendicular to the upper blade 113 3 . Component force F 3 A torque is generated to rotate the rotation shaft 111 counterclockwise. In the component force F 3 The torque generated to the rotating shaft 111 is greater than the tangential force of the spring 118When the torque generated by the spring 118 to the rotation shaft 111 is preset to the threshold force, the rotation shaft 111 rapidly rotates counterclockwise. Rotation of the rotary shaft 111 rotates the vane 110 toward the closed position of the vane. The connecting rod 119 moves upward with the movement of the connecting arm 323 so that each blade 110 is rotated in synchronization.
During the counterclockwise rotation of the rotation shaft 111 of the uppermost vane 110, the rotation shaft 111 drives the first rod 326 of the locking device 117 to move counterclockwise together, and the movement of the first rod 326 drives the second rod 327 to swing downward as a whole. The second lever portion 327 swings counterclockwise about the first link shaft 336, the right end thereof moves downward and rightward along with the first lever portion 326, and the left end thereof moves downward. The swinging of the second lever portion 327 drives the third lever portion 328 to rotate clockwise about the supporting shaft 341. The angle α between the second and third bars 327, 328 increases gradually until the linkage passes over the dead center position, the second and third bars 327, 328 form a downward-arching angle, and the elbow stop 329 contacts the bottom of the gap 362, allowing the elbow structure to reach its closed position. The guard valve 100 reaches the closed state as shown in fig. 5A and 5B.
As shown in fig. 5A and 5B, the guard valve 100 is in a closed state, with each vane 110 in a respective closed position. The fluid passage 120 in the guard valve 100 is closed such that the inlet 105 and the outlet 106 are disconnected. Even if the impact force is F 1 Is withdrawn and each spring 118 is further stretched by the upward movement of the connecting rod 119, each spring 118 providing a greater tangential force F to the corresponding rotating shaft 111 4 (the tangential force F) 4 Torque is still generated to rotate the rotation shaft 111 and the blades 110 clockwise). But the rotation shaft 111 of the uppermost vane 110 is locked by the locking means 117 so that the rotation shaft 111 cannot be rotated clockwise, thereby being able to maintain each vane 110 in its respective closed position.
Specifically, as shown in FIGS. 5A and 5B, in tangential force F 4 The first lever 326 of the locking device 117 has a tendency to rotate clockwise. The second 327 and third 328 bars of the elbow structure form a downward camber angle α, and α is an obtuse angle. In the state shown in the drawing, the third lever 328 has a tendency to rotate clockwise about the supporting shaft 341, and the second lever 327 has a tendency to rotate counterclockwise about the first link shaft 336. However, the elbow structure cannot continue to move because the third stem 328 is blocked by the elbow stop 329 on the second stem 327 and thus the first stem 326 cannot continue to move. In the case where the first lever 326 is not movable, the corresponding rotation shaft 111 is also not rotated clockwise. Thereby, the locking means 117 are able to lock the respective rotation shafts 111, so that the connection rod 119 is not able to move, and thus the blade 110 can be maintained in its closed position.
When it is desired to reopen the guard valve 100, the operator may apply a force to the second and third bars 327, 328 of the locking device 117 from the opposite side of the elbow stop 329 to the second link shaft 337 such that the angle α between the second and third bars 327, 328 is re-arched upwardly. Tangential force F exerted by spring 118 of uppermost blade 110 4 The corresponding rotation shaft 111 rotates clockwise, the first rod portion 326 drives the second rod portion 327 to lift upwards, and the second rod portion 327 pushes the third rod portion 328 to rotate counterclockwise around the supporting shaft 341 through the second link shaft 337 until returning to the state shown in fig. 4B again. The connecting rod 119 moves downwardly to bring and hold each blade 110 in its open position.
Thus, when there is a relatively high impact airflow on the inlet 105 side of the protection valve 100, the protection valve 100 can automatically close quickly to avoid impact or other impact of the airflow on equipment in the outlet 106 side of the protection valve 100. Only after the operator confirms the environment, the locking means 117 of the protection valve 100 is manually opened, and the protection valve 100 continues to communicate with the inlet 105 side and the outlet 106 side.
The protection valve 100 of the present embodiment can set the impact force F according to the elastic force of the setting spring 118 and the preset threshold force without an external power device 1 Is set to a threshold value of (1) for the protection valve 100 to be at the impact force F 1 Above the threshold, the guard valve 100 can automatically close.
Fig. 6 is a right side view of the barrier valve 600 in a closed state according to the second embodiment of the present application, showing the structure of another embodiment of the locking device. As shown in fig. 6, the protection valve 600 is different from the protection valve 100 only in that the elbow joint stopper of the locking device is different, and the structures of the vane 110, the spring 118, and the connecting rod 119 are the same as those of the protection valve 100, which will not be described herein.
As shown in fig. 6, the guard valve 600 includes an elbow stop 668, the elbow stop 668 being disposed on the outer sidewall of the right side portion 103 of the guard valve 600 below the third lever portion 328. When the elbow structure reaches the closed position, the outer side of the third lever 328 abuts the elbow stop 668, thereby preventing movement of the third lever 328 and thus the elbow structure. The provision of the elbow stop 668 also locks the rotational axis 111 of the uppermost vane 110 to maintain each vane 110 in its respective closed position.
Fig. 7 is a right side view of a barrier valve 700 in an opened state according to a third embodiment of the present application, showing a structure of still another embodiment of the locking device, wherein a partially enlarged view of the locking device is shown in a broken line frame. As shown in fig. 7, the protection valve 700 is different from the protection valve 100 only in the structure of the locking device, and the structures of the vane 110, the spring 118, and the connecting rod 119 are the same as those of the protection valve 100, which will not be described again.
As shown in fig. 7, the locking means includes a ratchet 765, and the ratchet 765 is connected to the end 109 of the rotation shaft 111 of the uppermost blade 110 and rotates with the rotation of the rotation shaft 111. When the ratchet 765 cannot be rotated, the rotation shaft 111 cannot be rotated accordingly. A plurality of bevel teeth 764 are arranged on the circumference of the ratchet 765, each bevel tooth 764 inclines clockwise, tooth grooves 767 are arranged between adjacent bevel teeth 764, and the width of each tooth groove 767 gradually increases from inside to outside. The locking device further includes a lever 771 and a pawl 766, one end of the lever 771 is rotatably connected to the supporting shaft 341, and the other end is connected to the pawl 766, and the pawl 766 can be inserted into a tooth groove 767 on the ratchet 765.
The rotation shaft 111 rotates the ratchet 765 counterclockwise as the uppermost vane 110 moves from the open position to the closed position as shown in fig. 7. Pawl 766 slides from one tooth slot 767 into an adjacent tooth slot 767 along the tooth back of bevel tooth 764.
When the uppermost vane 110 moves to the closed position, the pawl 766 is caught in the tooth groove 767 and cannot slide, so that the pawl 766 can prevent the rotation of the ratchet 765, thereby preventing the rotation of the rotation shaft 111 in the opening direction, and thus maintaining each vane 110 in the respective closed position.
Fig. 8A and 8B are right side views of a protection valve 800 according to a fourth embodiment of the present application, wherein fig. 8A shows a right side view of the protection valve 800 in an open state, and fig. 8B shows a right side view of the protection valve 800 in a closed state. As shown in fig. 8A and 8B, the guard valve 800 does not include a locking device therein, and the locking action is achieved by the spring 818. The vane 110 and the connecting rod 119 are identical to the protection valve 100, and will not be described again.
As shown in fig. 8A and 8B, the springs 818 are located on both sides of the center line of the connection arm 823, respectively, when the barrier valve 800 is in the open state and the closed state, respectively. The arrangement is such that the direction of torque applied by the spring 818 to the rotational shaft 111 through the connecting arm 823 is exactly opposite when the blade 110 is in the open and closed positions. That is, when the vane 110 is in the open position, the spring 818 can apply a torque to the rotation shaft 111 that rotates the rotation shaft 111 clockwise. While when the vane 110 is in the closed position, the spring 818 can apply a torque to the rotation shaft 111 that turns the rotation shaft 111 counterclockwise. Thus, even if a separate locking means is not provided, the purpose of preventing the rotation shaft 111 from rotating in the opening direction when the blades 110 are in the closed position can be achieved only by the spring 818, thereby holding each of the blades 110 in the respective closed positions.
The protection valve can be installed on a wall or in a pipeline through the frame, is flexible in installation mode, can ensure the ventilation effect of the inner side and the outer side when being opened, and can be rapidly closed when encountering air flow with impact force larger than a certain threshold value so as to block the air flow. The protection valve is simple and reliable in structure, and can be automatically closed without an external power supply device, a sensor and the like.
Although the application will be described with reference to the specific embodiments shown in the drawings, it should be understood that many variations of the protective valve of the application are possible without departing from the spirit and scope of the teachings of the application. Those skilled in the art will also recognize that there are different ways to alter the details of the structure of the disclosed embodiments of the present application, and that they fall within the spirit and scope of the present application and the claims.

Claims (11)

1. A protective valve, comprising:
a frame having opposite first and second sides;
a plurality of vanes, each vane disposed between the first and second sides, the vanes having an open position and a closed position, wherein each vane has a rotational axis supported by the first and second sides, and each vane is rotatable about an axis of the respective rotational axis between its open and closed positions, and wherein the plurality of vanes are configured to form a fluid passageway between adjacent vanes in their open position, and wherein adjacent vanes abut one another in their closed position, thereby enabling disconnection of the fluid passageway;
a plurality of elastic means provided on the outer side wall of the first side portion respectively corresponding to the rotation shafts of the plurality of blades, the plurality of elastic means being configured to be capable of applying torque to the respective rotation shafts to rotate the respective blades in an opening direction, respectively;
a locking device configured to lock the plurality of vanes in the closed position of the vanes;
a support shaft connected to an outer sidewall of the first side portion of the frame;
wherein the locking device comprises a linkage mechanism comprising a first rod portion, a second rod portion and a third rod portion, and a first link shaft and a second link shaft, wherein a first end of the first rod portion is connected to the rotation shaft, a second end of the first rod portion is rotatably connected with a first end of the second rod portion through the first link shaft, a second end of the second rod portion is rotatably connected with a first end of the third rod portion through the second link shaft, and a second end of the third rod portion is rotatably connected to the support shaft; and is also provided with
Wherein the second and third lever portions form an elbow joint structure which rotates about the second link shaft between its open and closed positions, and wherein the blade is also in its open position when the elbow joint structure is in its open position and the blade is also in its closed position when the elbow joint structure is in its closed position.
2. The guard valve of claim 1, wherein:
the protection valve further includes a plurality of first stoppers provided on an inner sidewall of at least one of the first side portion and the second side portion corresponding to the open positions of the plurality of blades, respectively, the plurality of first stoppers being configured to restrict the blades from rotating in an opening direction when the blades are in the open positions.
3. The guard valve of claim 2, wherein:
the protection valve further comprises a plurality of connecting arms which are respectively connected to one ends of the rotating shafts of the plurality of blades and are intersected with the rotating shafts, and the rotating shafts can drive the connecting arms to move when rotating;
the plurality of elastic means have first ends connected to the first side of the frame and second ends connected to the respective connecting arms, the elastic means being configured to be able to apply the torque to the rotating shaft through the connecting arms.
4. A guard valve according to claim 3, wherein:
the protection valve further comprises a connecting sleeve, the connecting sleeve is sleeved at one end of the rotating shaft, and the connecting arm is connected to the rotating shaft through the connecting sleeve.
5. The guard valve of claim 4 wherein:
the protection valve further comprises a connecting rod, the connecting rod is connected to the plurality of connecting arms, and the connecting arms can be driven to move by movement.
6. The guard valve of claim 1, wherein:
the locking device is further configured such that the locking device does not limit the rotational direction of the plurality of vanes when the plurality of vanes are not in their closed position.
7. The guard valve of claim 1, wherein:
the guard valve further comprises a second stop, wherein the elbow structure and the second stop are configured such that when the elbow structure is in its closed position, the third stem contacts the second stop to block continued rotation of the elbow structure, wherein an obtuse angle is formed between the third stem and the second stem.
8. The guard valve of claim 7 wherein:
the second stopper is provided on the second lever portion, and is configured to be able to contact an inner side of the third lever portion.
9. The guard valve of claim 8 wherein:
the second stopper is provided on an outer side wall of the first side portion of the frame, and is configured to be able to contact an outer side of the third lever portion.
10. The guard valve of claim 5, wherein:
the protection valve further includes a plurality of third stoppers provided on an inner sidewall of at least one of the first side portion and the second side portion corresponding to the closed positions of the plurality of vanes, respectively, the plurality of third stoppers being configured to restrict the vanes from rotating in a closing direction when the vanes are in the closed positions.
11. The guard valve of claim 1, wherein:
the resilient means is configured to apply a pulling force to the rotation axis that is less than a preset threshold force when the blade is in its open position.
CN202010494331.0A 2020-06-03 2020-06-03 Protective valve Active CN113757393B (en)

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CN202010494331.0A CN113757393B (en) 2020-06-03 2020-06-03 Protective valve

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CN113757393B true CN113757393B (en) 2023-10-10

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2828323A1 (en) * 1978-06-28 1980-01-10 Ras Rohrleitungs Apparate Und Flue gas flap actuating mechanism - has thermal expansion compensated frame to mount shafts with rotatable hubs carrying actuator brackets
JP2004218951A (en) * 2003-01-15 2004-08-05 Kubota Corp Damper device
CN105546129A (en) * 2016-01-28 2016-05-04 江苏爵格工业设备有限公司 Rainproof and anti-shockwave valve
CN205689771U (en) * 2016-05-14 2016-11-16 上虞市江南风机有限公司 A kind of fire resisting damper
GB2540356A (en) * 2015-07-13 2017-01-18 Afp Air Tech Ltd Two way pressure relief vent
CN208804234U (en) * 2018-08-03 2019-04-30 四川天宇坤建空调设备有限公司 A kind of valve member with locking member
CN209100654U (en) * 2018-11-09 2019-07-12 广州康美风数控设备股份有限公司 A kind of split leafy volume damper manually
CN110715086A (en) * 2019-09-26 2020-01-21 江苏爵格工业设备有限公司 Two-way shock wave resisting valve

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2828323A1 (en) * 1978-06-28 1980-01-10 Ras Rohrleitungs Apparate Und Flue gas flap actuating mechanism - has thermal expansion compensated frame to mount shafts with rotatable hubs carrying actuator brackets
JP2004218951A (en) * 2003-01-15 2004-08-05 Kubota Corp Damper device
GB2540356A (en) * 2015-07-13 2017-01-18 Afp Air Tech Ltd Two way pressure relief vent
CN105546129A (en) * 2016-01-28 2016-05-04 江苏爵格工业设备有限公司 Rainproof and anti-shockwave valve
CN205689771U (en) * 2016-05-14 2016-11-16 上虞市江南风机有限公司 A kind of fire resisting damper
CN208804234U (en) * 2018-08-03 2019-04-30 四川天宇坤建空调设备有限公司 A kind of valve member with locking member
CN209100654U (en) * 2018-11-09 2019-07-12 广州康美风数控设备股份有限公司 A kind of split leafy volume damper manually
CN110715086A (en) * 2019-09-26 2020-01-21 江苏爵格工业设备有限公司 Two-way shock wave resisting valve

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