A flap valve drive mechanism

Abstract

The utility model belongs to flap valve technical field, concretely relates to a kind of flap valve driving mechanism, including valve body and the valve plate being set on valve body, the crank one end is fixedly connected with rotating shaft, and the other end is equipped with opening slot, the valve plate is connected with crank by connecting piece;The movable end of the output element is equipped with rolling bearing, the rolling bearing is rollably embedded in the opening slot of crank;Two the limiting block is respectively fixedly connected in valve body, and the limiting block is equipped with the limiting recess that matches with the outer diameter of rolling bearing;The supporting block is fixedly connected between two limiting blocks, and the rolling bearing is slidably connected in supporting block.In the utility model, by the gravity of valve plate itself and the resilience of valve plate sealing ring are converted into the locking force to output element, the self-locking of valve plate is realized, so that its sealing effect is more stable and can withstand greater pressure difference, also can prevent system air break power failure or when valve plate state change caused by the valve plate state change of valve plate two sides pressure difference too large when closing valve.

Description

Technical Field

[0001] This utility model belongs to the field of flap valve technology, and specifically relates to a flap valve driving mechanism. Background Technology

[0002] A flap valve is a type of valve that controls the flow of fluid by rotating a valve plate. Its typical structure mainly consists of a valve body, valve plate, crank, shaft, sealing ring, and drive mechanism. In pipeline systems with high-pressure and high-flow-rate media, flap valves need to overcome significant media resistance during opening and closing. Manual operation often lacks the necessary force to overcome this resistance, while the drive mechanism can select a suitable power source based on the valve's specific operating conditions and media parameters to provide sufficient driving force, ensuring the flap valve can open and close smoothly.

[0003] Currently, commonly used flap valves rely mainly on the stable output force of the output element to achieve valve closing and maintain a sealing effect. When the system experiences a gas or power outage, the sealing effect cannot be guaranteed, and leakage occurs. In addition, leakage will also occur when the fluid pressure difference on both sides of the valve plate is large, approaching or exceeding the capacity of the output element. Even if some mechanisms apply a positive force to the valve plate and are equipped with a locking structure to ensure that the valve plate remains sealed and locked in abnormal situations, this solution still has the disadvantages of increasing valve operation time while increasing the valve operation time, increasing the risk of mechanism failure and valve cavity leakage due to the added mechanism. Utility Model Content

[0004] The purpose of this utility model is to provide a flap valve drive mechanism, which aims to solve the problems that the valve plate cannot maintain a sealed state when the system is cut off from air or power, and that the valve plate seal becomes loose when the fluid pressure difference on both sides of the valve plate is large.

[0005] The specific technical solution adopted by this utility model is as follows:

[0006] A flap valve drive mechanism includes a valve body and a valve plate disposed on the valve body, and further includes:

[0007] A crank, one end of which is fixedly connected to a rotating shaft, and the other end of which has an open slot; the valve plate is connected to the crank via a connector.

[0008] The output element has a rolling bearing mounted on its movable end. The rolling bearing is rotatably embedded in the open slot of the crank to drive the crank to rotate and realize the opening and closing of the valve plate.

[0009] The two limiting blocks are respectively fixedly connected to the valve body, and the limiting blocks are provided with limiting grooves that match the outer diameter of the rolling bearing.

[0010] A support block is fixedly connected between two limiting blocks, and the rolling bearing is slidably connected inside the support block.

[0011] In a preferred embodiment, the output element includes a cylinder, which is fixedly connected to the lower surface of the valve body. A push rod is fixedly connected to the output end of the cylinder, and a drive linkage is rotatably connected to one end of the push rod. The rolling bearing is disposed at the end of the drive linkage.

[0012] In a preferred embodiment, a fixed shaft is fixedly connected to the side wall of the connector, and the fixed shaft is fixedly connected to the side wall of the valve plate.

[0013] In a preferred embodiment, the limiting block has two fixing holes along the vertical direction for installing the limiting block in the valve body, and a vertically penetrating clearance groove is also provided on one side of the limiting block.

[0014] In a preferred embodiment, the upper and lower ends of the support block are respectively provided with fixing holes for installation of the support block, and a clearance groove is provided on one side of the support block.

[0015] In a preferred embodiment, the two ends of the first and second clearance grooves are smoothly connected, and the width of the first and second clearance grooves is greater than the thickness of the crank, so as to avoid the crank and the drive connecting rod.

[0016] The technical effects achieved by this utility model are as follows:

[0017] This utility model discloses a flap valve drive mechanism. By designing a special crank structure, the output element drives the roller bearing to rotate the crank, which in turn drives the valve plate to open and close. When the crank rotates, the limit groove on the limit block is used to convert the valve plate's own weight and the valve plate sealing ring's rebound force into a locking force on the output component. This achieves self-locking of the valve plate at its limit position, making its sealing effect more stable and able to withstand greater pressure difference. It can also prevent changes in the valve plate's state caused by excessive pressure difference on both sides of the valve plate when the system is cut off from gas or power or when the valve is closed.

[0018] The present invention discloses a flap valve drive mechanism that does not require an output element to provide force to keep the valve plate closed when the valve is closed. The specifications of the output element can be appropriately reduced, saving system costs. Moreover, the mechanism has a simple structure and requires minimal modification to the existing flap valve main body design, and has no significant impact on the internal function of the flap valve. Attached Figure Description

[0019] Figure 1 This is a perspective view of the present invention;

[0020] Figure 2 This is a schematic diagram of the valve in the closed state of this utility model;

[0021] Figure 3This is a schematic diagram of the valve opening state of this utility model;

[0022] Figure 4 This is a schematic diagram of the limiting block and support block of this utility model;

[0023] Figure 5 This is a disassembled view of the limiting block and support block of this utility model.

[0024] The attached diagram lists the components represented by each number as follows:

[0025] 1. Valve body; 2. Valve plate; 3. Cylinder; 4. Push rod; 5. Drive connecting rod; 51. Rolling bearing; 6. Crank; 61. Rotating shaft; 62. Opening groove; 7. Connecting piece; 8. Fixed shaft; 9. Limiting block; 91. Fixing hole one; 92. Clearance groove one; 93. Limiting groove; 10. Support block; 101. Fixing hole two; 102. Clearance groove two. Detailed Implementation

[0026] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in a preferred embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments.

[0029] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0030] like Figures 1 to 3 As shown, a flap valve drive mechanism includes a valve body 1 and a valve plate 2 disposed on the valve body 1, and further includes:

[0031] Crank 6, one end of crank 6 is fixedly connected to shaft 61, and the other end is provided with an opening groove 62. Valve plate 2 is connected to crank 6 through connector 7.

[0032] The output element has a rolling bearing 51 installed at its movable end. The rolling bearing 51 is rotatably embedded in the opening groove 62 of the crank 6 to drive the crank 6 to rotate and realize the opening and closing of the valve plate 2.

[0033] Limiting blocks 9, two limiting blocks 9 are fixedly connected inside the valve body 1, and the limiting blocks 9 are provided with limiting grooves 93 that match the outer diameter of the rolling bearing 51;

[0034] Support block 10 is fixedly connected between two limit blocks 9, and rolling bearing 51 is slidably connected inside support block 10.

[0035] In the above embodiment, the output element makes a telescopic linear motion, which drives the drive connecting rod 5 to drive the rolling bearing 51 to roll in the open groove 62 at one end of the crank 6, so that the crank 6 drives the rotating shaft 61 and the valve plate 2 to rotate, thereby realizing the opening and closing action of the valve plate 2. A sealing ring is provided on the side of the valve plate 2 facing the valve body 1, which makes its sealing effect better.

[0036] To further explain, when the valve is open, the gravity of the valve plate 2 is converted into a horizontal force in the direction of the crank 6 toward the rolling bearing 51; when the valve is closed, the rebound force of the sealing ring on the valve plate 2 is converted into a horizontal force in the direction of the crank 6 toward the rolling bearing 51. Under the action of this clamping force, when the output element does not exert force, the rolling bearing 51 cannot be dislodged in the limiting groove 93 of the limiting block 9, thus achieving mechanism locking; moreover, when the pressure difference between the two sides of the valve plate 2 is greater in the closed state, the clamping force of the mechanism is also greater, and the locking effect is more reliable.

[0037] Furthermore, the crank 6 should be installed in a position that aligns with the clearance groove 92 of the limit block 9 to prevent the output component from colliding with the limit block 9 when it is in operation. When installing the limit block 9, the output component should be moved to its limit position and the rolling bearing 51 should be completely placed into the limit groove 93 of the limit block 9 and secured. When the valve is closed, the distance between the limit block 9 and the plane of the opening groove 62 should be adjusted by using shims, etc., so that the valve plate is well sealed and the rolling bearing 51 can be pulled out of the limit groove 93 when the output component is in operation.

[0038] like Figures 2 to 3 As shown, the output element includes a cylinder 3, which is fixedly connected to the lower surface of the valve body 1. A push rod 4 is fixedly connected to the output end of the cylinder 3. A drive link 5 is rotatably connected to one end of the push rod 4. A rolling bearing 51 is located at the end of the drive link 5.

[0039] In the above embodiment, the rolling bearing 51 at the end of the drive link 5 is pushed to slide on the limiting block 9 and the support block 10 by the operation of the output element. When sliding, the crank 6 set on the rolling bearing 51 can be rotated, thereby driving the valve plate 2 to open or close.

[0040] It should be further noted that the main drive device in the output element here is cylinder 3, which can also be replaced with an electric cylinder, depending on the actual situation.

[0041] like Figure 2 As shown, a fixed shaft 8 is fixedly connected to the side wall of the connector 7, and the fixed shaft 8 is fixedly connected to the side wall of the valve plate 2.

[0042] In the above embodiment, when the crank 6 rotates, the crank 6 drives the connecting piece 7 to rotate synchronously through the rotating shaft 61. The connecting piece 7 is fixed to the valve plate 2 through the fixed shaft 8, so that when the connecting piece 7 rotates, it can drive the valve plate 2 to rotate synchronously, thereby realizing the opening and closing of the valve plate 2.

[0043] like Figures 4 to 5 As shown, the limiting block 9 has two fixing holes 91 in the vertical direction for installing the limiting block 9 in the valve body 1. The limiting block 9 also has a vertical clearance groove 92 on one side.

[0044] In the above embodiment, the limiting block 9 can be installed in the valve body 1 through the fixing hole 91. After installation, the studs or other installation parts used for installation can be completely hidden in the fixing hole 91, without affecting the rolling of the rolling bearing 51.

[0045] like Figure 4 As shown, the upper and lower ends of the support block 10 are respectively provided with fixing holes 101 for the installation of the support block 10. A clearance groove 102 is provided on one side of the support block 10. The two ends of the clearance groove 92 and the clearance groove 102 are smoothly connected, and the width of the clearance groove 92 and the clearance groove 102 is greater than the thickness of the crank 6, so as to avoid the crank 6 and the drive connecting rod 5.

[0046] In the above embodiment, two limiting blocks 9 are respectively installed at the upper and lower ends of the support block 10. The two ends of the first relief groove 92 on the limiting block 9 and the second relief groove 102 on the support block 10 can be connected to each other, so that the rolling bearing 51 can roll without obstruction.

[0047] The working principle of this utility model is as follows: When this mechanism is used to open and close the valve plate 2, the cylinder 3 is first moved by the external control system. When the cylinder 3 is moving, the push rod 4 connected to its output end drives the drive connecting rod 5 to push the rolling bearing 51 to roll in the opening groove 62 at one end of the crank 6. When the rolling bearing 51 rolls, it can drive the crank 6 to rotate through the opening groove 62, which in turn drives the rotating shaft 61 connected to it to rotate. When the rotating shaft 61 rotates, it can drive the connecting piece 7 to rotate synchronously, which in turn drives the valve plate 2 to rotate through the fixed shaft 8, thereby realizing the opening or closing action of the valve plate 2. When it reaches the limit position, the rolling bearing 51 is locked into the limiting groove 93 to achieve self-locking. Specifically, when the cylinder 3 retracts, the valve plate 2 can be closed, and when the cylinder 3 extends, the valve plate 2 can be opened. Moreover, the rolling bearing 51 at the end of the drive connecting rod 5 can reduce the impact of the cylinder 3's extension. The wear caused by rolling within the opening groove 62 ensures that the rolling bearing 51 always rolls on the limiting block 9 and the support block 10 when it is pushed or pulled, so that its position does not leave the rotating shaft 61. The limiting block 9 and the support block 10 have relief groove 1 92 and relief groove 2 102 respectively to avoid interference from the crank 6, the drive connecting rod 5, etc. When the valve plate rotates to the limit position, fully open or fully closed, the power output element just reaches the limit position. At this time, the rolling bearing 51 just falls into the limiting groove 93 of the limiting block 9, and is directly facing the end face of the opening groove 62, forming a clamping and limiting action on the rolling bearing 51 at the end of the power output component. This ensures that the power output element cannot move when the system is de-energized and the valve opening position and valve closing sealing effect are guaranteed. When the valve plate 2 rotates to the middle position, the rolling bearing 51 at the end of the drive connecting rod 5 rolls within the opening groove 62, driving the crank 6, the rotating shaft 61 and the valve plate 2 to rotate.

[0048] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A flap valve driving mechanism, comprising a valve body (1) and a valve plate (2) disposed on the valve body (1), characterized in that: Also includes: A crank (6) is fixedly connected to a shaft (61) at one end and has an opening groove (62) at the other end. The valve plate (2) is connected to the crank (6) through a connector (7). The output element is equipped with a rolling bearing (51) at its movable end. The rolling bearing (51) is rotatably embedded in the opening groove (62) of the crank (6) to drive the crank (6) to rotate and realize the opening and closing of the valve plate (2). Limiting blocks (9), two of the limiting blocks (9) are fixedly connected inside the valve body (1), and the limiting blocks (9) are provided with limiting grooves (93) that match the outer diameter of the rolling bearing (51). The support block (10) is fixedly connected between two limiting blocks (9), and the rolling bearing (51) is slidably connected within the support block (10).

2. The flap valve driving mechanism according to claim 1, characterized in that: The output element includes a cylinder (3), which is fixedly connected to the lower surface of the valve body (1). A push rod (4) is fixedly connected to the output end of the cylinder (3). A drive link (5) is rotatably connected to one end of the push rod (4). The rolling bearing (51) is located at the end of the drive link (5).

3. The flap valve driving mechanism according to claim 1, characterized in that: The side wall of the connector (7) is fixedly connected to a fixed shaft (8), which is fixedly connected to the side wall of the valve plate (2).

4. The flap valve driving mechanism according to claim 2, characterized in that: The limiting block (9) has two fixing holes (91) in the vertical direction for installing the limiting block (9) in the valve body (1). A clearance groove (92) is also provided on one side of the limiting block (9) that runs vertically through it.

5. A flap valve driving mechanism according to claim 4, characterized in that: The upper and lower ends of the support block (10) are respectively provided with fixing holes (101) for the installation of the support block (10), and a clearance groove (102) is provided on one side of the support block (10).

6. A flap valve driving mechanism according to claim 5, characterized in that: The two ends of the first (92) and the second (102) of the avoidance groove are smoothly connected, and the width of the first (92) and the second (102) of the avoidance groove is greater than the thickness of the crank (6) to avoid the crank (6) and the drive connecting rod (5).

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