A swing check valve

Abstract

The utility model discloses a swing check valve, which relates to the field of valve technology. The technical solution thereof is mainly as follows: it comprises a valve body, mounting flanges are arranged on both sides of the valve body, a valve cover is arranged on the top of the valve body, a rocker is rotatably arranged in the valve body, a valve disc is fixedly arranged on a remote lever, a leaf spring is arranged on the end side of the valve disc away from the rotating shaft of the remote lever, the leaf spring is arranged obliquely away from the valve disc, a support block corresponding to the leaf spring is arranged in the valve body, a pushing assembly movably connected to the valve disc is arranged on the valve cover, and the pushing assembly is used to push the valve disc to block the inlet of the valve body. The utility model arranges a leaf spring and a pushing assembly on the side of the valve disc away from the inlet of the valve body, and the leaf spring and the pushing assembly reduce the force exerted on the valve disc by the fluid, and at the same time, when the fluid pressure is reduced, the valve disc can be accelerated to block the inlet of the valve body to prevent the fluid from flowing back through the valve body.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, and more specifically, to a swing check valve. Background Art

[0002] The swing check valve is a common type of check valve. Its working principle is to open and close by relying on the weight of the valve disc and the pressure of the medium. When the medium flows forward, the fluid pressure pushes the valve disc open, the valve disc rotates around the axis, the valve opens, and the medium passes smoothly. When the medium flows in the reverse direction, the fluid pressure pushes the valve disc to close, preventing the medium from flowing back. However, the swing check valve closes slowly: when the medium flows back, the valve disc responds relatively slowly, which may cause a certain degree of backflow.

[0003] Therefore, a new solution needs to be proposed to solve this problem. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a swing check valve, by arranging a leaf spring and a pushing assembly on the side of the valve disc away from the valve body inlet, the leaf spring and the pushing assembly reduce the force exerted on the valve disc by the fluid, and at the same time when the fluid pressure is reduced, the valve disc can be accelerated to block the inlet of the valve body to prevent the fluid from flowing back through the valve body.

[0005] The above-mentioned technical purpose of the utility model is achieved through the following technical scheme: a swing check valve, comprising a valve body, mounting flanges are arranged on both sides of the valve body, a valve cover is arranged on the top of the valve body, a rocker is rotatably arranged in the valve body, a valve disc is fixedly arranged on the remote rod, a leaf spring is arranged on the end side of the valve disc away from the rotating shaft of the remote rod, the leaf spring is inclined away from the valve disc, a support block corresponding to the leaf spring is arranged in the valve body, a pushing assembly movably connected to the valve disc is arranged on the valve cover, and the pushing assembly is used to push the valve disc to block the inlet of the valve body.

[0006] Preferably, the pushing assembly includes a mounting sleeve, one end of the mounting sleeve is rotatably connected to the remote rod, a push rod is slidably connected in the mounting sleeve, one end of the push rod away from the mounting sleeve is rotatably connected to the valve cover, an elastic member is sleeved on the push rod, and the elastic member has elastic potential energy to push the mounting sleeve away from the valve cover.

[0007] Preferably, a sealing member corresponding to the valve flap is provided at the inlet of the valve body, the sealing member is provided with a convex ring, and the valve flap is provided with a groove corresponding to the convex ring.

[0008] Preferably, the inner wall of the seal has a plurality of permanent magnets in an annular array, and the valve flap is made of carbon steel.

[0009] The utility model has the following beneficial effects:

[0010] When the medium flows forward and the fluid pressure pushes the valve disc open, the elastic member slows down the rotation rate of the valve disc through the mounting sleeve. When the valve disc is about to contact the valve body, the leaf spring on the valve disc contacts the support block in advance, and the leaf spring slows down the force of the fluid pressure on the valve disc to prevent the end of the valve disc from violently colliding with the inner wall of the valve body. At the same time, when the fluid pressure decreases, the leaf spring and the elastic member push the valve disc away from the side wall of the valve body through their own elastic potential energy, accelerating the valve disc to block the inlet of the valve body. When the valve disc is close to the sealing member at the inlet, the permanent magnet generates suction on the carbon steel valve disc, so that the groove on the valve disc corresponds to the convex ring, thereby achieving the effect of sealing the inlet of the valve body and preventing the fluid from flowing back through the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the utility model;

[0012] Figure 2 It is a cross-sectional view of the utility model;

[0013] Figure 3 It is a structural schematic diagram of the sealing element and valve disc of the utility model.

[0014] In the figure: 1. valve body; 2. mounting flange; 3. valve cover; 4. rocker; 5. valve disc; 6. leaf spring; 7. support block; 8. mounting sleeve; 9. push rod; 10. elastic part; 11. sealing part; 12. convex ring; 13. groove; 14. permanent magnet block. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0016] A swing check valve, such as Figures 1 to 3 As shown, it includes a valve body 1, mounting flanges 2 are provided on both sides of the valve body 1, a valve cover 3 is installed on the top of the valve body 1 by bolts, a rocker 4 is rotatably installed on the shaft hole in the valve body 1, a valve flap 5 for blocking the inlet of the valve body 1 is fixedly installed on the remote lever by bolts, a leaf spring 6 is fixedly installed on the end side of the valve flap 5 away from the rotating shaft of the remote lever, and the leaf spring 6 is tilted away from the valve flap 5, a supporting block 7 corresponding to the leaf spring 6 is integrally formed in the valve body 1, a pushing component movably connected to the valve flap 5 is provided on the valve cover 3, and the pushing component is used to push the valve flap 5 to block the inlet of the valve body 1.

[0017] In the above embodiment, when the medium flows forward and the fluid pressure pushes open the valve flap 5, the leaf spring 6 on the valve flap 5 contacts the support block 7 in advance, and the leaf spring 6 reduces the force exerted by the fluid pressure on the valve flap 5, thereby preventing the end side of the valve flap 5 from violently colliding with the inner wall of the valve body 1. At the same time, when the fluid pressure decreases, the leaf spring 6 pushes the valve flap 5 away from the side wall of the valve body 1 through its own elastic potential energy, thereby accelerating the valve flap 5 to block the inlet of the valve body 1.

[0018] refer to Figure 2 As shown: the pushing assembly includes a mounting sleeve 8, one end of the mounting sleeve 8 is rotatably connected to the shaft hole of the remote lever, a push rod 9 is slidably connected in the mounting sleeve 8, and the end of the push rod 9 away from the mounting sleeve 8 is rotatably connected to the shaft hole of the valve cover 3, and an elastic member 10 is sleeved on the push rod 9, and the elastic member 10 has elastic potential energy to push the mounting sleeve 8 away from the valve cover 3

[0019] In the above embodiment, the elastic member 10 can push the valve flap 5 to rotate close to the inlet of the valve body 1 through the mounting sleeve 8, so that when the valve flap 5 is subjected to fluid pressure, the elastic member 10 can slow down the rotation rate of the valve flap 5 to prevent the valve flap 5 from having a large collision with the valve body 1. At the same time, when the flow rate of the fluid slows down and the thrust on the valve flap 5 is reduced, the elastic member 10 will push the valve flap 5 to block the inlet of the valve body 1 to prevent the fluid from flowing back through the valve body 1.

[0020] refer to Figure 3 As shown: a seal 11 corresponding to the valve disc 5 is arranged at the inlet of the valve body 1, the seal 11 is provided with a convex ring 12, a groove 13 corresponding to the convex ring 12 is arranged on the valve disc 5, a plurality of permanent magnet blocks 14 are arranged in an annular array on the inner wall of the seal 11, and the valve disc 5 is made of carbon steel.

[0021] When the valve flap 5 fits against the seal 11 at the inlet of the valve body 1 , the permanent magnet 14 generates suction on the valve flap 5 made of carbon steel, so that the groove 13 on the valve flap 5 corresponds to the convex ring 12 , thereby achieving the effect of sealing the inlet of the valve body 1 and preventing the fluid from flowing back through the valve body 1 .

[0022] In summary:

[0023] When the medium flows forward, the fluid pressure pushes open the valve disc 5, and the elastic member 10 slows down the rotation rate of the valve disc 5 through the mounting sleeve 8. When the valve disc 5 is about to contact the valve body 1, the leaf spring 6 on the valve disc 5 contacts the support block 7 in advance, and the leaf spring 6 slows down the force of the fluid pressure on the valve disc 5 to prevent the end side of the valve disc 5 from violently colliding with the inner wall of the valve body 1. At the same time, when the fluid pressure decreases, the leaf spring 6 and the elastic member 10 push the valve disc 5 away from the side wall of the valve body 1 through their own elastic potential energy, and accelerate the valve disc 5 to block the inlet of the valve body 1. When the valve disc 5 is close to the sealing member 11 at the inlet, the permanent magnet block 14 generates suction on the carbon steel valve disc 5, so that the groove 13 on the valve disc 5 corresponds to the convex ring 12, thereby achieving the effect of sealing the inlet of the valve body 1 and preventing the fluid from flowing back through the valve body 1.

[0024] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A swing check valve, comprising a valve body (1), mounting flanges (2) are arranged on both sides of the valve body (1), a valve cover (3) is arranged on the top of the valve body (1), a rocker (4) is rotatably arranged in the valve body (1), and a valve disc (5) is fixedly arranged on the rocker, characterized in that: A leaf spring (6) is arranged on the end side of the valve flap (5) away from the rotation axis of the remote lever, and the leaf spring (6) is arranged obliquely away from the valve flap (5). A support block (7) corresponding to the leaf spring (6) is arranged in the valve body (1), and a pushing component movably connected to the valve flap (5) is arranged on the valve cover (3), and the pushing component is used to push the valve flap (5) to block the inlet of the valve body (1).

2. The swing check valve according to claim 1, characterized in that: The pushing assembly comprises a mounting sleeve (8), one end of the mounting sleeve (8) is rotatably connected to a remote rod, a push rod (9) is slidably connected inside the mounting sleeve (8), one end of the push rod (9) away from the mounting sleeve (8) is rotatably connected to the valve cover (3), and an elastic member (10) is sleeved on the push rod (9), and the elastic member (10) has elastic potential energy for pushing the mounting sleeve (8) away from the valve cover (3).

3. The swing check valve according to claim 2, characterized in that: A sealing member (11) corresponding to the valve disc (5) is provided at the inlet of the valve body (1), the sealing member (11) is provided with a convex ring (12), and a groove (13) corresponding to the convex ring (12) is provided on the valve disc (5).

4. The swing check valve according to claim 3, characterized in that: The inner wall of the sealing member (11) is provided with a plurality of permanent magnet blocks (14) in an annular array, and the valve flap (5) is made of carbon steel.

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