Closable flap valve

Abstract

The closable flap valve comprises a valve body, a through cavity is formed in the valve body, a left cavity opening and a right cavity opening are formed in the two sides of the through cavity respectively, a valve disc is arranged on the through cavity, a lever is connected to the back face of the valve disc, one end of the lever is connected to a pin shaft, and the other end of the lever is connected to a valve rod. The lever is provided with a clamping spring at the position of the pin shaft, the clamping spring acts to enable the valve disc to be attached to and separate the through cavity, the other side of the lever protrudes and extends to form a supporting block, a valve rod is arranged on the supporting block in an abutting mode, and the valve rod abuts against the supporting block to enable the valve disc to further seal and separate the through cavity. The flap valve can be further sealed and separated through the valve rod, and the problems that closing is not tight and sealing performance is poor due to the fact that the inner wall scabs are solved.

Description

Technical Field

[0001] This application relates to the field of valves, and particularly to a closable flap valve. Background Art

[0002] The flap valve has poor sealing performance and is prone to caking on the inner wall during use. Caking on the inner wall of the flap valve will cause problems such as poor closing and air leakage, and the caking on the inner wall will cause jamming and inflexible movement of the inner wall of the flap valve, greatly affecting work efficiency. Utility Model Content

[0003] The purpose of the present utility model is to provide a closable flap valve with better sealing performance.

[0004] To achieve the above object, the present utility model provides the following technical solutions.

[0005] An embodiment of this application discloses a closable flap valve, including a valve body. A through cavity is formed inside the valve body. A left cavity opening and a right cavity opening are respectively formed on both sides of the through cavity. A valve disc is arranged on the through cavity. A lever is connected to the back of the valve disc. One end of the lever is connected to a pin shaft. A snap ring is arranged on the lever at the pin shaft. The snap ring functions to make the valve disc fit and partition the through cavity. A support block protrudes from the other side of the lever. A valve rod is abutted on the support block. The valve rod abuts on the support block to further seal and partition the through cavity by the valve disc.

[0006] Preferably, in the above closable flap valve, a sealing gasket is formed on the surface of the valve disc.

[0007] Preferably, in the above closable flap valve, the sealing gasket is arranged between the valve disc and the pressing plate.

[0008] Preferably, in the above closable flap valve, a valve cover is arranged on the top of the valve body. The valve rod is connected through the valve cover by threads.

[0009] Preferably, in the above closable flap valve, a gland is arranged on the top of the valve cover. The valve rod passes through the gland.

[0010] Preferably, in the above closable flap valve, sealing packing is arranged outside the valve rod below the gland.

[0011] Preferably, in the above closable flap valve, a handwheel is arranged on the top of the valve rod.

[0012] Compared with the prior art, the present utility model can further seal and partition the flap valve through the valve rod, ensuring the problems of poor closing and poor sealing performance caused by caking on the inner wall. Brief Description of the Drawings

[0013] 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 required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0014] Figure 1 The figure shows a cross-sectional view of a closable flap valve in an embodiment of the present utility model.

[0015] Figure 2 As shown Figure 1 is the cross-sectional view taken along line B-B in Detailed implementation manners

[0016] The following will describe in detail the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0017] Combined with Figure 1-2 As shown, the closable flap valve 100 includes a valve body 101. A through cavity 102 is formed inside the valve body 101. A left cavity opening 103 and a right cavity opening 104 are respectively formed on both sides of the through cavity 102. A valve disc 105 is arranged on the through cavity 102. A lever 106 is connected to the back of the valve disc 105. One end of the lever 106 is connected to a pin shaft 107. A snap ring 108 is arranged at the pin shaft 107 of the lever 106. The snap ring 108 functions to make the valve disc 105 fit and block the through cavity 102. A support block 109 protrudes from the other side of the lever 106. A valve stem 110 is abutted on the support block 109. The valve stem 110 abuts on the support block 109 to further seal and block the through cavity 102 by the valve disc 105. A sealing gasket 111 is formed on the surface of the valve disc 105. The sealing gasket 111 is arranged between the valve disc 105 and a pressing plate 112. A valve cover 113 is arranged on the top of the valve body 101. The valve stem 110 is connected through the valve cover 113 by threads. A gland 114 is arranged on the top of the valve cover 113. The valve stem 110 passes through the gland 114. A sealing packing 115 is arranged outside the valve stem 110 below the gland 114. A handwheel 116 is arranged on the top of the valve stem 110.

[0018] During specific use, it is hermetically sealed by the action of the snap ring in normal times and can be opened when the pressure of the flowing liquid is relatively high. When hermetic sealing is required, it is blocked by applying pressure to the valve stem; when the inner wall forms a crust and the closure is not tight, resulting in air leakage easily, it can be further blocked well in time through the action of the valve stem to ensure the sealing performance.

[0019] It should be noted that in this text, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising a..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the said element.

[0020] The above are only specific embodiments of the present application. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A closable flap valve, characterized in that: The utility model comprises a valve body, wherein a through cavity is formed inside the valve body, and a left cavity opening and a right cavity opening are respectively formed on both sides of the through cavity, a valve disc is arranged on the through cavity, a lever is connected to the back side of the valve disc, one end of the lever is connected to a pin shaft, and a retaining spring is arranged on the lever at the pin shaft, and the retaining spring acts to make the valve disc fit and separate the through cavity, and a support block is formed by protruding from the other side of the lever, and a valve stem is abutted on the support block, and the valve stem abuts against the support block so that the valve disc further seals and separates the through cavity.

2. The closable flap valve according to claim 1, characterized in that: A sealing gasket is formed on the surface of the valve disc.

3. The closable flap valve according to claim 2, characterized in that: The sealing gasket is arranged between the valve disc and the pressure plate.

4. The closable flap valve according to claim 1, characterized in that: A valve cover is arranged on the top of the valve body, and the valve stem passes through the valve cover through a threaded connection.

5. The closable flap valve according to claim 4, characterized in that: A pressure cover is arranged on the top of the valve cover, and the valve stem passes through the pressure cover.

6. The closable flap valve according to claim 5, characterized in that: A sealing packing is arranged below the gland and outside the valve stem.

7. The closable flap valve according to claim 1, characterized in that: A hand wheel is arranged on the top of the valve stem.

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