Automatic opening and closing type flap valve
By utilizing fluid impact pressure to achieve rapid opening and closing through an automatic opening and closing flap valve, the problems of slow opening and closing speed, laborious operation, and high safety risks of traditional slide gate valves are solved, providing a simple and reliable fluid control solution.
Patent Information
- Application Number
- CN202511697910.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-19
- Publication Date
- 2026-02-03
AI Technical Summary
Traditional slide gate valves are slow to open and close, require a lot of effort to operate, occupy a lot of space, suffer from severe fluid pressure loss and pose high safety risks, and cannot adjust the opening degree according to the operating conditions and flow rate.
Design an automatic opening and closing flap valve that uses the impact pressure of fluid flow to provide the opening force. The valve plate is automatically and quickly opened and closed through a lever arm structure and a counterweight. The structure is simple and does not require an external power source.
It achieves rapid start-up and shutdown, reduces failure rate, simplifies maintenance, reduces fluid pressure loss, improves safety, and adapts to different operating conditions and flow requirements.
Smart Images
Figure CN121452380A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of valves, in particular to an automatic opening and closing flap valve. BACKGROUND
[0002] The flap valve is a common fluid control valve, and its core function is to allow fluid to flow in one direction and prevent medium backflow. The traditional parallel fan outlet usually uses a manual or electric flap valve as a throttling device for medium control.
[0003] However, the design and application of the traditional flap valve have the following disadvantages: 1) slow opening and closing speed, long operation time, the opening and closing of the valve plate need to be rotated by multiple turns through a hand wheel and an actuator or manually inserted and extracted, the valve operation stroke is long, and the valve cannot be quickly opened and closed, which is time-consuming and labor-intensive; the opening and closing characteristics are not adjustable, the valve plate generates severe vortex and turbulence in the half-open state, causing fluid pressure loss, so the opening and closing of the flap valve is usually fixed, and the valve opening degree cannot be adjusted according to the actual flow; large space occupation, the overall structure size of the valve is large, and a large space needs to be reserved for installation and operation in the height or length direction; large operating force, potential safety risk, in the case of high pressure or valve plate jamming, the operator usually needs to exert a lot of force or lengthen the lever to operate, which poses a potential threat to the personal safety of the operator. SUMMARY
[0004] To solve the above problems, the present application provides an automatic opening and closing flap valve.
[0005] The present application provides an automatic opening and closing flap valve, which comprises a main shell, a force arm structure, a valve plate and a counterweight. The main shell is provided with a pipe segment and an expanded shell body, the expanded shell body is sealingly connected to the peripheral gap of the pipe segment, the pipe segment is limited to be butt-jointed at the axial two ends in the vertical target pipeline, the force arm structure is provided with a rotating shaft and first and second force arms connected to the opposite sides of the rotating shaft in the radial direction, the rotating shaft is rotatably arranged in the expanded shell body, the first force arm is arranged across the inside of the pipe segment and the inside of the expanded shell body, and the second force arm is arranged outside the expanded shell body, the valve plate is connected to the first force arm, and the counterweight is connected to the second force arm. When the pressure of the upward flowing fluid in the vertical target pipeline is not greater than a preset value, the valve plate cuts off the fluid passage of the pipe segment, and when the pressure of the upward flowing fluid in the vertical target pipeline is greater than the preset value, the valve plate rotates upward.
[0006] In some embodiments, the pipe segment comprises: a main pipe, the main pipe is provided with a peripheral gap, and the expanded shell body is connected to the main pipe; The auxiliary pipe has a diameter smaller than that of the main pipe, is arranged at one axial end of the main pipe, and is sealingly connected with the main pipe. An axial end of the auxiliary pipe adjacent to the main pipe is a passage opening. The valve plate seals the passage opening to cut off the fluid passage of the pipe section when the pressure of the upward flowing fluid in the vertical target pipeline is not greater than a preset value. The axial end of the main pipe away from the auxiliary pipe and the axial end of the auxiliary pipe away from the main pipe are arranged to be docked in the vertical target pipeline, and the auxiliary pipe is lower than the main pipe when docked.
[0007] In some embodiments, the axial end of the main pipe away from the auxiliary pipe and the axial end of the auxiliary pipe away from the main pipe are each provided with a flange.
[0008] In some embodiments, the side of the valve plate facing the passage opening is provided with an elastic sealing gasket.
[0009] In some embodiments, the outer expansion shell comprises: The circumferential plate is sealingly connected with the pipe section at the circumferential surface gap, and the through hole on one side of the circumferential plate is in communication with the inner cavity of the pipe section. The rotating shaft is rotatably arranged in the circumferential plate. The blind plate is sealingly connected with the other side through hole of the circumferential plate.
[0010] In some embodiments, a sealing packing is arranged between the rotating shaft and the circumferential plate.
[0011] In some embodiments, the outer expansion shell further comprises: The limiting member is connected to the end of the circumferential plate away from the blind plate, and is arranged in the pipe section. The limiting member is arranged at the end of the allowable rotation path of the first force arm.
[0012] In some embodiments, the rotating shaft is provided with a rotating angle display component.
[0013] In some embodiments, the counterweight is detachably connected with the second force arm.
[0014] In some embodiments, the automatic opening and closing flap valve is provided with a plurality of counterweights of different weights, and the second force arm is connected with any one of the counterweights.
[0015] The application has the following beneficial effects: the automatic opening and closing type flap valve comprises a main shell, a force arm structure, a valve plate and a counterweight, the main shell is provided with a pipe section and an expanded shell body, and the one-way flow function is realized, the flap valve is automatically closed when the fluid impact force is low, and the valve plate is kept in the position state of cutting off the fluid passage of the pipe section; when the fluid impact force is high, the valve plate rotates upward when the fluid pressure is greater than the preset value, and the valve plate leaves the position state of cutting off the fluid passage of the pipe section; the application provides opening force by using fluid flow impact pressure, has fast response speed, realizes the functions of automatic and rapid opening and closing, and has the advantages of low failure rate and convenient maintenance. BRIEF DESCRIPTION OF DRAWINGS
[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description only show some embodiments of the present application.
[0017] Figure 1 The application provides an overall structure schematic diagram of an automatic opening and closing type flap valve. Figure 2 The application provides an overall structure schematic diagram of an automatic opening and closing type flap valve. Figure 1 The application provides a structure schematic diagram of a rotating shaft and related sealing. Figure 3 The application provides a schematic diagram of the valve plate cutting off the fluid passage of the pipe section and the valve plate rotating upward.
[0018] The application provides an overall structure schematic diagram of an automatic opening and closing type flap valve. DETAILED DESCRIPTION
[0019] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.
[0020] Moreover, the reference numerals and / or the reference letters in the various examples can be repeated with differing referencing types. Such repetition is intended to illustrate different instances creating one of the various embodiments and / or arrangements being discussed. In addition, various specific process and material examples are provided herein, but it is understood that other processes and / or materials could be utilized.
[0021] Please refer to Figures 1 to 3 , the application provides an automatic opening and closing flap valve, comprising a main shell 100, a force arm structure 200, a valve plate 300 and a counterweight 400.
[0022] Please refer to Figure 1 and Figure 2 , the main shell 100 is provided with a pipe segment 110 and an expanded shell 120, the pipe segment 110 is provided with a circumferential surface notch, the circumferential surface notch is opened at the circumferential surface of the pipe segment 110, the expanded shell 120 is sealingly connected at the circumferential surface notch of the pipe segment 110, the sealing connection at this place keeps the sealing between the expanded shell 120 and the pipe segment 110, avoiding the leakage of fluid during operation.
[0023] The pipe segment 110 is limited to be butt-jointed at the axial two ends in the vertical target pipeline, Figure 3 The orientation of the pipe segment 110 in the application is shown when the application is applied, the automatic opening and closing flap valve provided by the application only allows the fluid to flow from bottom to top.
[0024] As Figure 1 shown, the force arm structure 200 is provided with a rotating shaft 210, a first force arm 220 and a second force arm 230, the first force arm 220 and the second force arm 230 are both connected with the rotating shaft 210, and under the premise that the rotating shaft 210 has a radial direction, the first force arm 220 and the second force arm 230 are connected on the opposite sides of the radial direction of the rotating shaft 210. Among them, the rotating shaft 210 is rotatably arranged in the expanded shell 120, the first force arm 220 is arranged across the inside of the pipe segment 110 and the inside of the expanded shell 120, and the second force arm 230 is arranged outside the expanded shell 120.
[0025] Under the premise of arranging the above-mentioned force arm structure 200, please refer to Figures 1 to 3 , the valve plate 300 is connected with the first force arm 220, and the counterweight 400 is connected with the second force arm 230.
[0026] The application has functional limitations, which are embodied in that the valve plate 300 cuts off the fluid passage of the pipe section 110 when the pressure of the upward flowing fluid of the vertical target pipeline is not greater than a preset value, and the valve plate 300 rotates upward when the pressure of the upward flowing fluid of the vertical target pipeline is greater than the preset value. The application realizes the function of one-way flow, and the flap valve automatically closes when the fluid impact force is low, which is embodied in that the valve plate 300 remains in the position state of cutting off the fluid passage of the pipe section 110, and when the fluid impact force is high, that is, when the pressure of the fluid is greater than the preset value, the valve plate 300 rotates upward, and the valve plate 300 leaves the position state of cutting off the fluid passage of the pipe section 110.
[0027] The application uses fluid flow impact pressure to provide opening force, has fast response speed, and realizes the function of automatic and rapid opening and closing. The application does not need external power source and complex control device, and belongs to pure mechanical structure, which has the advantages of simple and reliable structure, low failure rate and convenient maintenance.
[0028] The above-mentioned preset value of the pressure of the fluid is a limit state, which is further described in combination with the description of Figure 1 and Figure 3 , and the device distribution direction in Figure 3 is taken as the description basis.
[0029] Firstly, under the condition of ignoring the influence of the gravity of the force arm, the torque exerted by the counterweight 400 on the rotating shaft 210 makes the rotating shaft 210 have a motion trend of rotating clockwise, the torque exerted by the valve plate 300 on the rotating shaft 210 makes the rotating shaft 210 have a motion trend of rotating counterclockwise, the torque exerted by the valve plate 300 on the rotating shaft 210 is greater than the torque exerted by the counterweight 400 on the rotating shaft 210, and the valve plate 300 is in the position state of cutting off the fluid passage of the pipe section 110.
[0030] The fluid runs from bottom to top, and the pressure of the fluid generates a pressure on the valve plate 300. The pressure is calculated by F=P×S, and the pressure generates a torque on the rotating shaft 210, which makes the rotating shaft 210 have a motion trend of rotating clockwise. In the limit state, the sum of the torque calculated by the fluid pressure and the torque calculated by the gravity of the counterweight 400 is equal to the torque calculated by the gravity of the valve plate 300, and at this time, the pressure of the fluid is the above-mentioned preset value. When the pressure of the fluid is greater than the preset value, the rotating shaft 210 will rotate clockwise, so that the valve plate 300 automatically leaves the position state of cutting off the fluid passage of the pipe section 110.
[0031] In actual calculation, the influence of the gravity of the first force arm 220 and the gravity of the second force arm 230 on the rotation of the rotating shaft 210 needs to be considered, and the above-mentioned preset value can still be calculated according to the existing torque-related technology. In more rigorous analysis, other factors that hinder the rotation of the rotating shaft 210, such as motion resistance, may also need to be considered.
[0032] The expression formula in the limit state, ignoring the influence of the force arm of gravity, is PxAxL=F 板 xL1-F 配 xL2, P is the opening pressure of the valve plate 300, that is, the minimum starting pressure difference, which is the pressure difference between the upper and lower pipelines when the valve plate 300 cuts off the fluid passage of the pipe section 110, A is the effective area of the valve plate 300, L is the force arm size of the fluid impact force, F 板 is the gravity of the valve plate 300, L1 is the force arm size of the gravity of the valve plate 300, F 配 is the gravity of the counterweight 400, and L2 is the force arm size of the gravity of the counterweight 400.
[0033] As can be seen, when the size of the torque exerted by the counterweight 400 on the rotating shaft 210 changes, the above limit value will also change. Therefore, by adjusting the counterweight 400, the opening pressure and closing response speed of the valve can be conveniently customized, so that the present application has the beneficial effect of strong universality.
[0034] When the fluid flows from bottom to top and the pressure gradually increases, the impact force of the fluid on the valve plate 300 will form an opening torque on the rotating shaft 210. When the opening torque is greater than PxAxL in the state of the above limit value, the valve plate 3002 starts to rotate, and the valve is opened.
[0035] When the fluid pressure decreases, causing the opening torque to decrease to less than PxAxL in the state of the above limit value, the valve plate 300 will automatically close, effectively preventing medium leakage.
[0036] Therefore, in some embodiments, the counterweight 400 is detachably connected with the second force arm 230, facilitating adjustment or replacement of the counterweight 400.
[0037] In some embodiments, the automatic opening and closing flap valve is equipped with counterweights 400 of multiple weight specifications, and the second force arm 230 is connected with any counterweight 400 of a weight specification, each weight specification of the counterweight 400 corresponding to a different opening pressure of the valve.
[0038] In some embodiments, the installation position of the counterweight 400 on the second force arm 230 is unique, so that the force arm size of the gravity of the counterweight 400 is a constant value, simplifying the related adjustment difficulty.
[0039] In some embodiments, please refer to Figure 1 and Figure 2, the pipe segment 110 comprises a main pipe 111 and a sub-pipe 112. The main pipe 111 is provided with a circumferential surface notch, and the outer expansion shell 120 is connected with the main pipe 111. The diameter of the sub-pipe 112 is smaller than that of the main pipe 111, the sub-pipe 112 is arranged at one axial end of the main pipe 111, and the sub-pipe 112 is sealingly connected with the main pipe 111. One axial end of the sub-pipe 112 adjacent to the main pipe 111 is a passage opening 1121, and the valve plate 300 seals the passage opening 1121 to cut off the fluid passage of the pipe segment 110 when the pressure of the upward flowing fluid in the vertical target pipeline is not greater than a preset value.
[0040] The axial end of the main pipe 111 away from the sub-pipe 112 and the axial end of the sub-pipe 112 away from the main pipe 111 are used to be connected in the vertical target pipeline, and the sub-pipe 112 is lower than the main pipe 111 when connected.
[0041] Through the comprehensive design of the main pipe 111 and the sub-pipe 112, the diameter of the passage opening 1121 in the pipe segment 110 is smaller than the inner diameter of the main pipe 111, and the inner diameter of the pipe segment 110 is large enough, so that the valve plate 300 does not interfere with the pipe segment 110 when moving in the pipe segment 110.
[0042] In some embodiments, the axial end of the main pipe 111 away from the sub-pipe 112 and the axial end of the sub-pipe 112 away from the main pipe 111 are provided with flanges 113, and the automatic opening and closing type flap valve of the present application can be conveniently installed in the vertical target pipeline through the connection of the flanges 113.
[0043] In some embodiments, please refer to Figure 3 One side of the valve plate 300 facing the passage opening 1121 is provided with an elastic sealing gasket 310, and the sealing connection of the valve plate 300 and the sub-pipe 112 is realized through the elastic sealing gasket 310.
[0044] In some embodiments, please refer to Figure 3 The outer expansion shell 120 comprises a circumferential plate 121 and a blind plate 122. The circumferential plate 121 is provided with two side through holes, and the circumferential plate 121 is sealingly connected with the pipe segment 110 at the circumferential surface notch. One side through hole of the circumferential plate 121 is in communication with the inner cavity of the pipe segment 110, the rotating shaft 210 is rotatably arranged in the circumferential plate 121, and the blind plate 122 is sealingly connected with the other side through hole of the circumferential plate 121.
[0045] In some embodiments, a sealing packing 211 is arranged between the rotating shaft 210 and the circumferential plate 121, Figure 2 The installation position of the sealing packing 211 is shown in the figure, and a gland is correspondingly provided to realize the installation of the sealing packing 211 at the rotating shaft 210. The sealing packing 211 further ensures that the fluid does not leak during operation.
[0046] In some embodiments, please refer to Figure 3 The outer shell 120 further comprises a limiting member 123 connected to an end of the peripheral plate 121 away from the blind plate 122, and the limiting member 123 is arranged in the pipe segment 110. The limiting member 123 is arranged at the end of the allowable rotation path of the first force arm 220. The valve plate 300 or the first force arm 220 connected with the valve plate 300 can rotate to the position in contact with the limiting member 123 at most, thereby preventing over-opening.
[0047] In some embodiments, please refer to Figure 2 The rotating shaft 210 is equipped with a rotating angle display component 212. The rotating angle display component 212 can be a device for displaying the deflection angle by a pointer or can directly use an existing angle measurement related device. Since the existing related device is mainly used, no further description is given here.
[0048] The application provides an automatic opening and closing flap valve which can be applied to a layout scheme of parallel fans. The automatic opening and closing flap valve is installed in a pipeline associated with an air inlet of a fan, thereby effectively preventing medium from leaking through the air inlet of the fan.
[0049] In the present application, unless otherwise explicitly specified and limited, "on" or "under" of a first feature to a second feature can include that the first and second features are in direct contact or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "above" of the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. "Under", "below" and "below" of the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.
[0050] Although the preferred embodiments of the present application have been described, those skilled in the art can make further changes and modifications to the embodiments once they know the basic inventive concept. Therefore, the appended claims are intended to be interpreted as including all changes and modifications falling within the scope of the present application.
[0051] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.
Claims
1. An automatic opening and closing flap valve, characterized in that, include: The main shell includes a pipe section and an outer expansion shell. The outer expansion shell is sealed to the circumferential notch of the pipe section. The pipe section is defined to be axially connected at both ends to a vertical target pipe. The lever arm structure includes a rotating shaft and a first lever arm and a second lever arm connected to opposite radial sides of the rotating shaft. The rotating shaft is rotatably inserted through the outer expansion shell. The first lever arm spans the interior of the pipe section and the interior of the outer expansion shell, and the second lever arm is externally disposed on the outer expansion shell. The valve plate is connected to the first lever arm; The counterweight is connected to the second lever arm; Specifically, when the pressure of the upward-flowing fluid in the vertical target pipe is not greater than a preset value, the valve plate cuts off the fluid passage of the pipe section; when the pressure of the upward-flowing fluid in the vertical target pipe is greater than the preset value, the valve plate rotates upward.
2. The automatic opening and closing flap valve as described in claim 1, characterized in that, The pipe section includes: The main body has the circumferential notch, and the outer expansion shell is connected to the main body; A secondary pipe, the diameter of which is smaller than that of the main pipe, is inserted through one axial end of the main pipe and is sealed to the main pipe. The axial end of the secondary pipe adjacent to the main pipe is a channel opening. When the pressure of the upward flowing fluid in the vertical target pipe is not greater than a preset value, the valve plate seals the channel opening to cut off the fluid passage of the pipe section. The axial end of the main pipe away from the secondary pipe and the axial end of the secondary pipe away from the main pipe are used to connect in a vertical target pipe, and the secondary pipe is lower than the main pipe when connected.
3. The automatic opening and closing flap valve as described in claim 2, characterized in that, Flanges are provided at the axial end of the main pipe away from the secondary pipe and at the axial end of the secondary pipe away from the main pipe.
4. The automatic opening and closing flap valve as described in claim 2, characterized in that, An elastic sealing gasket is provided on the side of the valve plate facing the channel opening.
5. The automatic opening and closing flap valve as described in claim 1, characterized in that, The outer housing includes: A peripheral plate extends through both sides and is sealed to the pipe section at the notch on the peripheral surface. One through-hole of the peripheral plate communicates with the inner cavity of the pipe section, and the rotating shaft is rotatably inserted through the peripheral plate. A blind flange is sealed to the through-hole on the other side of the peripheral plate.
6. The automatic opening and closing flap valve as described in claim 5, characterized in that, The rotatable part between the rotating shaft and the peripheral plate is provided with sealing filler.
7. The automatic opening and closing flap valve as described in claim 5, characterized in that, The extended housing also includes: A limiting member is connected to one end of the peripheral plate away from the blind plate. The limiting member is internally disposed in the pipe section and is located at the end of the allowable rotation path of the first lever arm.
8. The automatic opening and closing flap valve as described in claim 1, characterized in that, The rotating shaft is equipped with a rotation angle display component.
9. The automatic opening and closing flap valve as described in claim 1, characterized in that, The counterweight is detachably connected to the second lever arm.
10. The automatic opening and closing flap valve as described in claim 9, characterized in that, The automatic opening and closing flap valve is equipped with multiple counterweights of different weights, and the second lever arm is connected to any one of the counterweights of different weights.