Check valve with rotational flow prevention and eccentricity prevention functions

Abstract

The invention relates to the field of check valves, and discloses a check valve with anti-swirl and anti-eccentricity functions, which comprises a right valve body, a left valve body is connected to one side of the right valve body, an upper valve body is connected to the upper ends of the left valve body and the right valve body, a connecting frame is arranged on one side, close to the right valve body, of the inner wall of the upper valve body, and a pin shaft is arranged on the inner side of the connecting frame. A rocker is connected to one side of the pin shaft, a connecting ejector block is arranged at the end, away from the pin shaft, of the rocker, and a valve disc is connected to one side of the connecting ejector block. The right valve body is a fluid inlet position, fluid enters from the right valve body and then is guided out from the left valve body, in the process, when the fluid enters the right valve body, the fluid passes through the guide vanes which are symmetrically arranged, the direction of the guide vanes is consistent with the flow direction of the fluid, the fluid is forced to be kept in a laminar flow state, and a formation path of potential rotating vortexes is broken; and the guide vanes are symmetrically arranged in the right valve body relative to the center of the right valve body, so that fluid eccentricity is effectively avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of check valves, in particular to a check valve with anti-swirl and anti-eccentricity functions. BACKGROUND

[0002] The check valve refers to a valve with a circular valve disc that blocks the flow of medium in the opposite direction by its own weight and medium pressure, belonging to the automatic valve category, also known as non-return valve, one-way valve, backflow valve or isolation valve. The valve disc movement is divided into lifting type and swing type. The check valve is a valve that allows medium to flow in one direction and prevents it from flowing in the opposite direction. Usually, such a valve works automatically, and the valve disc opens under the pressure of the fluid flowing in one direction. When the fluid flows in the opposite direction, the valve disc acts on the valve seat under the combined action of fluid pressure and its own weight, thereby cutting off the flow.

[0003] In the prior art, when fluid enters the check valve, the fluid is prone to form a rotating vortex when passing through the sudden change in cross section, which causes the valve disc to bear periodic alternating lateral forces, resulting in vibration, noise and fatigue damage. The fluid impact force is unevenly distributed along the valve, the center of the fluid does not coincide with the geometric axis of the valve, and the eccentric flow will intensify the friction between the fluid and the inner wall of the equipment, and at the same time cause local turbulence. The fluid flows in one direction in the traditional check valve, and the valve body lacks active compensation ability to prevent reverse flow when the fluid flow rate decreases or disappears, and the closing speed of the valve disc needs to be improved. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a check valve with anti-swirl and anti-eccentricity functions to solve the problems in the prior art that when fluid enters the check valve, the fluid is prone to form a rotating vortex when passing through the sudden change in cross section, which causes the valve disc to bear periodic alternating lateral forces, resulting in vibration, noise and fatigue damage. The fluid impact force is unevenly distributed along the valve, the center of the fluid does not coincide with the geometric axis of the valve, and the eccentric flow will intensify the friction between the fluid and the inner wall of the equipment, and at the same time cause local turbulence. The fluid flows in one direction in the traditional check valve, and the valve body lacks active compensation ability to prevent reverse flow when the fluid flow rate decreases or disappears, and the closing speed of the valve disc needs to be improved.

[0005] To solve the above-mentioned problems, the present application is realized by the following technical scheme.

[0006] The utility model provides an anti -rotation anti -eccentric function check valve, including: right valve body, one side of right valve body is connected with left valve body, the upper valve body is connected on left valve body and right valve body upper end, the inner wall of upper valve body is provided with connecting frame near right valve body side, the inner side of connecting frame is provided with pin shaft, and one side of pin shaft is connected with rocker, the one end away from pin shaft of rocker is provided with connecting top block, one side of connecting top block is connected with valve disc, and the one side away from connecting top block of valve disc is bonded with first sealing washer, the one side of right valve body contact valve disc is provided with second sealing washer in first sealing washer position. The valve disc is provided with a rebound base on the side close to the left valve body, and a sliding groove is formed in the rebound base. A telescopic rod is arranged in the sliding groove and extends out of the rebound base. A limiting piece is connected to the side of the telescopic rod that extends into the rebound base. A spring is arranged around the telescopic rod that extends out of the rebound base. A pressing top plate is connected to the end of the telescopic rod that extends out of the rebound base. The inner wall of the right valve body is provided with not less than four guide vanes.

[0007] In an embodiment, a right flange piece is welded and fixed to the end of the right valve body away from the left valve body. A left flange piece is welded and fixed to the end of the left valve body away from the right valve body.

[0008] In an embodiment, an upper flange piece is welded and fixed to the upper end of the upper valve body. A valve cover is arranged on the upper end of the upper flange piece. Mounting bolts are arranged at equal distances around the outer circle of the valve cover and the upper flange piece. Mounting threaded holes are formed in the valve cover and the upper flange piece at the positions where the mounting bolts are arranged. Mounting threaded holes are also formed in the outer circle of the right flange piece and the left flange piece at positions corresponding to the positions of the outer circle of the valve cover and the upper flange piece.

[0009] In an embodiment, not less than five reinforcing blocks are welded and fixed at equal distances between the upper flange piece and the upper valve body. The reinforcing blocks are in triangular shape.

[0010] In an embodiment, the valve disc forms a rotatable structure with the connecting frame through the rocker and the pin shaft. The valve disc is in circular shape. The cross-sectional diameter of the valve disc is larger than the inner wall diameter of the right valve body.

[0011] In an embodiment, an arc-shaped convex pad is bonded and fixed to the side of the first sealing washer that contacts the second sealing washer. An arc-shaped reserved groove is formed in the position of the second sealing washer that contacts the arc-shaped convex pad.

[0012] In an embodiment, the pressing top plate is in disc shape. The diameter of the pressing top plate is larger than the cross-sectional diameter of the spring.

[0013] In an embodiment, one side of the rebounding top block is bonded with a second rubber pad, and the pressing top plate is bonded with a first rubber pad away from one end of the telescopic rod, and the surfaces of the first rubber pad and the second rubber pad are uneven.

[0014] In an embodiment, the guide vanes are arranged equidistantly in the right valve body, and the cross section of the guide vanes is thin on both sides and thick in the middle.

[0015] The application provides a check valve with anti-swirl and anti-eccentricity functions. The right valve body is a fluid inlet, and the fluid enters the right valve body and is then guided out of the left valve body. In this process, the fluid enters the right valve body and passes through a plurality of symmetrically arranged guide vanes, the direction of the guide vanes is consistent with the flow direction of the fluid, the fluid is forced to maintain a laminar flow state, and the formation path of potential rotating vortex is broken. The plurality of guide vanes are symmetrically arranged about the center of the right valve body, effectively avoiding fluid eccentricity. When the fluid pushes the pressing top plate on one side of the valve disc, the pressing top plate lightly hits the rebounding top block, the first rubber pad on one side of the pressing top plate directly contacts the second rubber pad on one side of the rebounding top block, and the metal is prevented from being damaged and making noise for a long time. At this time, the telescopic rod is retracted into the sliding groove of the rebounding base, the spring is compressed, the direction of the fluid pushing force on the valve disc is opposite when the fluid has a reverse flow trend, the spring resets to pull out the telescopic rod from the rebounding base, the limiting piece on one side of the telescopic rod can prevent the telescopic rod from being pulled out of the rebounding base, at this time, the pressing top plate can be quickly separated from the rebounding top block, and due to the rebounding force of the spring, not only the separation of the pressing top plate and the rebounding top block is accelerated, but also the valve disc can quickly return to the right valve body side. When the fluid flows in the reverse direction, the pre-compressed spring releases the stored energy to drive the valve disc to quickly return to the original position, the response time of the action is shortened to be faster than that of the traditional gravity type, and the reverse flow is effectively inhibited. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a whole three-dimensional structure diagram of the check valve with anti-swirl and anti-eccentricity functions.

[0017] Figure 2 It is a front view plane structure diagram of the check valve with anti-swirl and anti-eccentricity functions.

[0018] Figure 3 It is a side view plane structure diagram of the check valve with anti-swirl and anti-eccentricity functions.

[0019] Figure 4 It is a front view cross-sectional structure diagram of the check valve with anti-swirl and anti-eccentricity functions.

[0020] Figure 5 It is a check valve with anti-swirl and anti-eccentricity functions. Figure 4 It is an enlarged structure diagram of the middle A.

[0021] Figure 6 Structure diagram of valve disc of check valve with anti-swirl and anti-eccentricity function.

[0022] Figure 7 Structure diagram of check valve with anti-swirl and anti-eccentricity function after rocking lever rotates.

[0023] Figure 8 Structure diagram of check valve with anti-swirl and anti-eccentricity function. Figure 7 Structure diagram of check valve with anti-swirl and anti-eccentricity function.

[0024] The reference signs in the drawings are as follows: 1, right valve body; 2, right flange piece; 3, mounting threaded hole; 4, left valve body; 5, left flange piece; 6, upper valve body; 7, upper flange piece; 8, reinforcing block; 9, valve cover; 10, mounting bolt; 11, connecting frame; 12, pin shaft; 13, rocking lever; 14, connecting top block; 15, valve disc; 16, first sealing washer; 17, arc-shaped convex pad; 18, second sealing washer; 19, arc-shaped reserved groove; 20, rebound base; 21, sliding groove; 22, telescopic rod; 23, limiting piece; 24, spring; 25, pressing top plate; 26, first rubber pad; 27, second rubber pad; 28, rebound top block; 29, guide vane. DETAILED DESCRIPTION

[0025] The application will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the application and not used to limit the protection scope of the application.

[0026] The embodiments of the present application will be described in detail with specific examples. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in the specification. The present application can also be implemented or applied by other different embodiments, and each detail in the specification can be modified or changed based on different views and applications without departing from the spirit of the present application.

[0027] Reference Signs List Figures 1-8The utility model provides a check valve with anti-rotation and anti-eccentricity function, which comprises a right valve body 1, a left valve body 4 connected to one side of the right valve body 1, an upper valve body 6 connected to the upper ends of the left valve body 4 and the right valve body 1, a connecting frame 11 arranged on the inner wall of the upper valve body 6 close to the right valve body 1, a pin shaft 12 arranged on the inner side of the connecting frame 11, a rocker 13 connected to one side of the pin shaft 12, a connecting top block 14 arranged on the end of the rocker 13 away from the pin shaft 12, a valve disc 15 connected to one side of the connecting top block 14, a first sealing gasket 16 bonded to the side of the valve disc 15 away from the connecting top block 14, a second sealing gasket 18 arranged on the side of the right valve body 1 in contact with the valve disc 15 and corresponding to the position of the first sealing gasket 16, a rebound base 20 arranged on the side of the valve disc 15 close to the left valve body 4, a sliding groove 21 formed in the rebound base 20, an extension rod 22 penetrating through the sliding groove 21 and extending to the outside of the rebound base 20, a limiting sheet 23 connected to the side of the extension rod 22 inserted into the rebound base 20, a spring 24 sleeved on the outside of the extension rod 22 extending out of the rebound base 20, a pressing top plate 25 connected to the end of the extension rod 22 extending out of the rebound base 20, a rebound top block 28 arranged on the inner wall of the left valve body 4 along the movement track of the rebound base 20, and not less than four guide vanes 29 arranged on the inner wall of the right valve body 1.

[0028] The right flange sheet 2 is welded and fixed to the end of the right valve body 1 away from the left valve body 4, and the left flange sheet 5 is welded and fixed to the end of the left valve body 4 away from the right valve body 1.

[0029] The upper flange sheet 7 is welded and fixed to the upper end of the upper valve body 6, the valve cover 9 is arranged on the upper end of the upper flange sheet 7, the mounting bolts 10 are penetratingly arranged at equal distances around the outer circle of the valve cover 9 and the upper flange sheet 7, the mounting screw holes 3 are formed in the valve cover 9 and the upper flange sheet 7 in contact with the mounting bolts 10, and the mounting screw holes 3 are also formed in the outer circle of the right flange sheet 2 and the left flange sheet 5 corresponding to the positions of the outer circle of the valve cover 9 and the upper flange sheet 7.

[0030] Not less than five reinforcing blocks 8 are welded and fixed at equal distances between the upper flange sheet 7 and the upper valve body 6, and the reinforcing blocks 8 are in triangular shapes.

[0031] The valve disc 15 forms a rotatable structure with the connecting frame 11 through the rocker 13 and the pin shaft 12, the valve disc 15 is in a circular shape, and the cross-sectional diameter of the valve disc 15 is greater than the inner wall diameter of the right valve body 1.

[0032] The arc-shaped convex pad 17 is bonded and fixed to the side of the first sealing gasket 16 in contact with the second sealing gasket 18, and the arc-shaped reserved groove 19 is formed in the position of the second sealing gasket 18 in contact with the arc-shaped convex pad 17.

[0033] The pressing top plate 25 on one side of the valve disc 15 hits the rebound top block 28 under the fluid push, the first rubber pad 26 on one side of the pressing top plate 25 directly contacts the second rubber pad 27 on one side of the rebound top block 28, which can avoid the damage and noise caused by long-time metal impact, at this time the telescopic rod 22 is retracted into the sliding groove 21 of the rebound base 20, and the spring 24 is compressed, when the fluid has a reverse flow trend, the direction of the fluid push on the valve disc 15 is opposite, the spring 24 resets to pull out the telescopic rod 22 in the rebound base 20, and the limiting piece 23 on one side of the telescopic rod 22 can prevent the telescopic rod 22 from being pulled out of the rebound base 20, at this time the pressing top plate 25 can be quickly separated from the rebound top block 28, and due to the rebound force of the spring 24, not only the separation of the pressing top plate 25 and the rebound top block 28 is accelerated, but also the valve disc 15 can quickly return to the right side of the right valve body 1, when the fluid flows in the opposite direction, the pre-compressed spring 24 releases the stored energy to drive the valve disc 15 to quickly return to the original position, the response time of the action is shortened to be faster than the traditional gravity type, and the reverse flow is effectively inhibited, at this time the first sealing gasket 16 on one side of the valve disc 15 contacts the second sealing gasket 18 on one side of the right valve body 1, and the side of the first sealing gasket 16 contacting the second sealing gasket 18 is bonded with an arc convex pad 17, the position of the second sealing gasket 18 contacting the arc convex pad 17 is provided with an arc reserved groove 19, and the arc convex pad 17 sinking into the arc reserved groove 19 can increase the sealing contact area.

[0034] The pressing top plate 25 is a disc, and the diameter of the pressing top plate 25 is greater than the cross-sectional diameter of the spring 24.

[0035] One side of the rebound top block 28 is bonded with the second rubber pad 27, and the end of the pressing top plate 25 away from the telescopic rod 22 is bonded with the first rubber pad 26, and the surfaces of the first rubber pad 26 and the second rubber pad 27 are uneven.

[0036] The guide vanes 29 are transversely equidistantly arranged in the inner wall of the right valve body 1, and the cross section of the guide vanes 29 is thin on both sides and thick in the middle.

[0037] The right valve body 1 is a water inlet, water enters the right valve body 1 and then is guided out of the left valve body 4, in this process, when the water enters the right valve body 1, it will pass through multiple guide vanes 29, the direction of the guide vanes 29 is consistent with the flow direction of the water, and the guide vanes 29 force the fluid to maintain a laminar flow state and break the formation path of potential rotating vortex.

[0038] In use, the valve cover 9 is covered on the upper side of the upper flange plate 7, and then the mounting bolt 10 is rotated and penetrated into the mounting threaded hole 3 of the valve cover 9 and the upper flange plate 7, the upper flange plate 7 is connected with the upper valve body 6, and the upper valve body 6 is connected with the right valve body 1 and the right valve body 1 through the right flange plate 2 and the left flange plate 5. The triangular reinforcing block 8 is arranged between the upper flange plate 7 and the right flange plate 2 and the left flange plate 5, the triangle in the polygon is the most stable, which can effectively increase the stability of the check valve, the equipment corresponding flange plate, the mounting bolt 10 is fixed to the corresponding mounting threaded hole 3 and connected with the equipment corresponding flange plate, after the connection of the check valve is completed, the right valve body 1 is the fluid inlet, the fluid enters from the right valve body 1 and is guided out by the left valve body 4, in this process, when the fluid enters the right valve body 1, it will pass through a plurality of symmetrically arranged flow guide vanes 29, the direction of the flow guide vane 29 is consistent with the flow direction of the fluid, and the fluid is forced to maintain a laminar flow state, which breaks the potential rotating vortex formation path, and a plurality of flow guide vanes 29 are symmetrically arranged about the center of the right valve body 1 in the right valve body 1, which effectively avoids fluid eccentricity, in the process of fluid entering from the right valve body 1 and being guided out by the left valve body 4, the fluid can push the valve disc 15, at this time, the pin shaft 12 on one side of the rocker 13 rotates in the inner side of the connecting frame 11, the valve disc 15 is connected with the rocker 13 through the connecting top block 14, when the valve disc 15 is pushed open by the fluid, the fluid can enter from the right valve body 1 and be guided out by the left valve body 4, and the pressing top plate 25 on one side of the valve disc 15 lightly hits the rebound top block 28 under the pushing of the fluid, the first rubber pad 26 on one side of the pressing top plate 25 directly contacts the second rubber pad 27 on one side of the rebound top block 28, which can avoid the damage and noise caused by long-time metal impact, at this time, the telescopic rod 22 is retracted into the sliding groove 21 of the rebound base 20, and the spring 24 is compressed, when the fluid has a reverse flow tendency, the direction of the fluid pushing force on the valve disc 15 is opposite, the spring 24 resets the telescopic rod 22 in the rebound base 20, and the limiting piece 23 on one side of the telescopic rod 22 can prevent the telescopic rod 22 from being pulled out of the rebound base 20, at this time, the pressing top plate 25 can be quickly separated from the rebound top block 28, and due to the rebound force of the spring 24, not only the separation of the pressing top plate 25 and the rebound top block 28 is accelerated, but also the valve disc 15 can quickly return to one side of the right valve body 1, at this time, the first sealing gasket 16 on one side of the valve disc 15 contacts the second sealing gasket 18 on one side of the right valve body 1, and the side of the first sealing gasket 16 contacting the second sealing gasket 18 is bonded and fixed with the arc convex pad 17, the position of the second sealing gasket 18 contacting the arc convex pad 17 is provided with an arc reserved slot 19, and the arc convex pad 17 is sunk into the arc reserved slot 19 to increase the sealing contact area, the quick and tight sealing of the valve disc 15 can effectively prevent fluid backflow, and ensure the one-way flow of the stop valve.

[0039] Thus, although the present application has been described herein with respect to particular embodiments thereof, alterations, modifications and variations will occur to others skilled in the art upon the reading and understanding of the foregoing description. It is intended that the application be construed as including all such alterations, modifications and variations as fall within the scope of the appended claims. Accordingly, the application is not intended to be limited to the specific embodiments described in the specification illustrating one or more aspects of the application and as such, other embodiments of the application will be obvious to one skilled in the art from this disclosure. It is therefore intended that the application not be limited, to the extent that modifications and variations do not constitute departures from the spirit and essence of the application.

Claims

1. A check valve with anti-swirling and anti-eccentricity functions, characterized in that, Include: Right valve body (1), one side of the right valve body (1) is connected with left valve body (4), the upper end of left valve body (4) and right valve body (1) is connected with upper valve body (6), the inner wall of upper valve body (6) is provided with connecting frame (11) near the side of right valve body (1), the inner side of connecting frame (11) is provided with pin shaft (12), and the side of pin shaft (12) is connected with rocker (13), the end of rocker (13) away from pin shaft (12) is provided with connecting top block (14), the side of connecting top block (14) is connected with valve disc (15), and the side of valve disc (15) away from connecting top block (14) is bonded with first sealing washer (16), the side of right valve body (1) contacting valve disc (15) is provided with second sealing washer (18) corresponding to the position of first sealing washer (16). The side of the valve disc (15) close to the left valve body (4) is provided with a rebound base (20), and the rebound base (20) is provided with a sliding groove (21) inside, the sliding groove (21) is provided with a telescopic rod (22) inside, and the telescopic rod (22) extends to the outside of the rebound base (20), the side of the telescopic rod (22) inserted into the rebound base (20) is connected with a limiting sheet (23), the outside of the telescopic rod (22) extending out of the rebound base (20) is provided with a spring (24), and the end of the telescopic rod (22) extending out of the rebound base (20) is connected with a pressing top plate (25), the inner wall of the left valve body (4) is provided with a rebound top block (28) along the track of the rebound base (20). The inner wall of the right valve body (1) is provided with not less than four guide vanes (29).

2. The check valve having a rotation-preventing and eccentricity-preventing function according to claim 1, characterized in that, The end of the right valve body (1) away from the left valve body (4) is welded with a right flange (2), and the end of the left valve body (4) away from the right valve body (1) is welded with a left flange (5).

3. The check valve with anti-swirl and anti-eccentricity functions according to claim 2, characterized in that, The upper end of the upper valve body (6) is welded with an upper flange (7), and the upper end of the upper flange (7) is provided with a valve cover (9), and the outer circle of the valve cover (9) and the upper flange (7) is provided with a mounting bolt (10) at equal distance, the valve cover (9) and the upper flange (7) are provided with a mounting thread hole (3) at the position contacting the mounting bolt (10), and the outer circle of the right flange (2) and the left flange (5) is provided with a mounting thread hole (3) at equal distance corresponding to the position of the outer circle of the valve cover (9) and the upper flange (7).

4. The check valve having the anti-swirl and anti-eccentricity function according to claim 3, characterized in that, The upper flange (7) and the upper valve body (6) are welded with not less than five reinforcing blocks (8) at equal distance, and the reinforcing blocks (8) are triangular.

5. The check valve with anti-swirl and anti-eccentricity functions according to claim 1, characterized in that, The valve disc (15) forms a rotatable structure with the connecting frame (11) through the rocker (13) and the pin shaft (12), and the valve disc (15) is circular, the cross section diameter of the valve disc (15) is greater than the inner wall diameter of the right valve body (1).

6. The check valve with anti-swirl and anti-eccentricity functions according to claim 1, characterized in that, The side of the first sealing washer (16) contacting the second sealing washer (18) is bonded with an arc convex pad (17), and the position of the second sealing washer (18) contacting the arc convex pad (17) is provided with an arc reserved groove (19).

7. The check valve with anti-swirl and anti-eccentricity functions according to claim 1, characterized in that, The pressing top plate (25) is disc-shaped, and the diameter of the pressing top plate (25) is greater than the cross-sectional diameter of the spring (24).

8. The check valve with anti-swirl and anti-eccentricity functions according to claim 1, characterized in that, One side of the rebound top block (28) is bonded with a second rubber pad (27), one end of the pressing top plate (25) away from the telescopic rod (22) is bonded with a first rubber pad (26), and the surfaces of the first rubber pad (26) and the second rubber pad (27) are uneven.

9. The check valve with anti-swirl and anti-eccentricity functions according to claim 1, characterized in that, The guide vanes (29) are transversely equidistantly arranged on the inner wall of the right valve body (1), and the cross section of the guide vanes (29) is in a structure that the middle part is thick and the two sides are thin.

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