Self-locking nickel check valve

Abstract

The utility model relates to a self-locking type nickel check valve which comprises a valve body, a rocker arm, a valve clack and a valve seat, a flow channel is arranged in the valve body, the valve seat is arranged on the valve body, one end of the rocker arm is hinged to the valve seat, the other end of the rocker arm is fixedly arranged on the valve clack, and the valve clack and the valve seat form a sealing state for cutting off the flow channel. Comprising a first magnetic part, a second magnetic part, a hinge rod and a vertical rod, the first magnetic part is fixed to the other side, opposite to the valve seat, of the valve clack, the second magnetic part is arranged on the valve body, and the first magnetic part and the second magnetic part have the protection state that the first magnetic part and the second magnetic part repel each other when getting close to each other; movement of the valve clack forms vertical sliding of the vertical rod, the vertical rod is provided with a limiting block located outside the valve body, and a compression spring driving the limiting block to move in the direction away from the valve body is arranged between the limiting block and the valve body. According to the self-locking nickel check valve, the valve clack is not prone to being damaged.

Description

Technical Field

[0001] The utility model relates to a check valve, in particular to a self-locking nickel check valve. Background Art

[0002] A self-locking check valve is an automatic valve whose main function is to prevent the backflow of the medium and protect the pipeline and equipment from damage caused by reverse flow. When the medium flows in the forward direction, the valve disc is pushed open due to the fluid pressure, allowing the medium to pass smoothly; when the flow stops or reverse flow occurs, the valve disc closes automatically due to its own weight, thereby preventing the reverse flow of the medium. The characteristic of this valve lies in its "self-locking" function, that is, once closed, it will not open automatically due to pressure fluctuations in the pipeline without external force, thereby enhancing the sealing and safety of the valve. It is widely used in water supply, drainage, petroleum, chemical industry, metallurgy, electric power and other fields.

[0003] However, when the medium flows at a faster speed, the valve disc is impacted by the medium and is opened. Due to the large impact force, the valve disc is easily collided with the valve body under the action of inertia. The current conventional solution is to add a buffer layer at the contact point between the valve disc and the valve body, but after long-term use, it will still cause damage to the valve body and valve disc. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model aims to provide a self-locking nickel check valve whose valve flap is not easily damaged.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: including a valve body, a rocker arm, a valve disc and a valve seat, a flow channel is arranged in the valve body, the valve seat is arranged on the valve body, one end of the rocker arm is hinged to the valve seat, and the other end is fixedly arranged on the valve disc, the valve disc has a sealing state with the valve seat to cut off the flow channel, and includes a first magnetic member, a second magnetic member, a hinged rod and a vertical rod, the first magnetic member is fixed to the other side of the valve disc relative to the valve seat, the second magnetic member is arranged on the valve body and is located on the relative trajectory of the movement of the first magnetic member, the first magnetic member and the second magnetic member have a protective state of mutual repulsion when approaching, the vertical rod is arranged on the valve body along the vertical sliding, one end of the hinged rod is hinged to the valve disc, and the other end is hinged to the vertical rod, the movement of the valve disc constitutes the vertical sliding of the vertical rod, the vertical rod is provided with a limit block located outside the valve body, and a compression spring driving the limit block to move away from the valve body is arranged between the limit block and the valve body. It should be noted that the spring force provided by the compression spring is much smaller than the gravity of the valve disc itself.

[0006] By adopting the above technical solution, when the medium is not flowing, the valve flap is against the valve seat under the action of gravity, and the compression spring is compressed at this time. Then when the medium is flowing, the valve flap is separated from the valve seat and moves away from the valve seat under the impact of the medium until the first magnetic part and the second magnetic part are close to each other. Under the repulsive force of the first magnetic part and the second magnetic part, the valve flap will not collide with the valve body. At the same time, the valve flap drives the vertical rod to move upward, and the compression spring is no longer compressed. When the medium is not flowing, the valve flap approaches the valve seat under the action of its own gravity and the repulsive force of the first magnetic part and the second magnetic part. As the first magnetic part and the second magnetic part move away from each other, their repulsive force gradually disappears. At this time, as the vertical rod moves downward, the compression spring is compressed, reducing the force of the collision between the valve flap and the valve seat, protecting the valve flap from damage. The setting of the first magnetic part and the second magnetic part reduces the probability of collision between the valve flap and the valve body, and the setting of the vertical rod, the hinged rod and the compression spring reduces the force when the valve flap collides with the valve seat, which also plays a role in protecting the valve flap.

[0007] The utility model is further configured as follows: it includes a fixing block and a fixing rod, an extension portion opposite to the valve disc is provided on the valve body and the extension portion is located on the relative trajectory of the movement of the valve disc, a fixing hole adapted to the fixing rod is provided on the extension portion, the fixing rod has an engaging groove engaged with the fixing block, the fixing block constitutes the fixing of the fixing rod on the extension portion, the second magnetic member is fixedly arranged at one end of the fixing rod opposite to the first magnetic member, the fixing block includes an upper side portion, a connecting portion and a lower side portion connected end to end in sequence, the upper side portion, the connecting portion and the lower side portion form a matching groove adapted to the extension portion, the lower side portion is provided with a fixing groove engaged with the engaging groove, and the connecting portion is provided with a locking hole for fixing the fixing block to the extension portion.

[0008] By adopting the above technical solution, when installing the second magnetic part, first fix the second magnetic part on the fixing rod, then pass the fixing rod through the fixing hole, and then make the fixing groove of the fixing block face the extension part and slide it in. At this time, engage the locking part of the fixing rod with the fixing groove of the fixing block, and finally use a screw through the locking hole to fix the fixing part on the extension part, thereby completing the installation of the second magnetic part.

[0009] The utility model is further configured as follows: a valve cover is detachably provided on the valve body, the valve cover is provided with a sliding hole for the vertical rod to slide, one end of the compression spring is located on the valve cover, and the other end is located on the limit block.

[0010] The utility model is further configured as follows: the inner wall of the flow channel is provided with a nickel-plated layer.

[0011] By adopting the above technical solution, the nickel plating layer has an anti-corrosion effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A cross-sectional view of the utility model as a whole;

[0013] Figure 2 For this utility model Figure 1 A partial enlarged view of middle A;

[0014] Figure 3 It is a structural schematic diagram of the fixing block of the utility model.

[0015] In the figure: 1. valve body; 11. extension part; 12. fixing hole; 13. nickel plating layer; 2. rocker arm; 3. valve disc; 4. valve seat; 5. flow channel; 6. first magnetic part; 7. second magnetic part; 71. fixing block; 711. upper side; 712. connecting part; 713. lower side; 72. fixing rod; 73. engaging groove; 74. matching groove; 75. fixing groove; 76. locking hole; 8. hinged rod; 81. vertical rod; 82. limit block; 83. compression spring; 9. valve cover; 91. sliding hole. DETAILED DESCRIPTION

[0016] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0018] like Figure 1-3As shown, the utility model discloses a self-locking nickel check valve, including a valve body 1, a rocker arm 2, a valve disc 3 and a valve seat 4, a flow channel 5 is arranged in the valve body 1, the valve seat 4 is arranged on the valve body 1, one end of the rocker arm 2 is hinged to the valve seat 4, and the other end is fixedly arranged on the valve disc 3, the valve disc 3 has a sealing state with the valve seat 4 to cut off the flow channel 5, and includes a first magnetic member 6, a second magnetic member 7, a hinged rod 8 and a vertical rod 81, the first magnetic member 6 is fixed to the other side of the valve disc 3 relative to the valve seat 4, the second magnetic member 7 is arranged on the valve body 1 and is located on the relative trajectory of the movement of the first magnetic member 6, the first magnetic member 6 and the second magnetic member 7 have a protective state of mutual repulsion when they are close to each other, and the vertical rod 81 slides vertically along the valve body 1. It is arranged on the valve body 1, one end of the hinged rod 8 is hinged to the valve disc 3, and the other end is hinged to the vertical rod 81. The movement of the valve disc 3 constitutes the vertical sliding of the vertical rod 81. The vertical rod 81 is provided with a limit block 82 located outside the valve body 1, and a compression spring 83 is provided between the limit block 82 and the valve body 1 to drive the limit block 82 to move away from the valve body 1. It should be noted that the spring force provided by the compression spring 83 is much smaller than the gravity of the valve disc 3 itself. The arrangement of the first magnetic component 6 and the second magnetic component 7 reduces the probability of collision between the valve disc 3 and the valve body 1, and the arrangement of the vertical rod 81, the hinged rod 8 and the compression spring 83 reduces the force when the valve disc 3 collides with the valve seat 4, and also plays a role in protecting the valve disc 3.

[0019] The valve body 1 includes a fixing block 71 and a fixing rod 72. The valve body 1 is provided with an extension portion 11 opposite to the valve flap 3 and the extension portion 11 is located on the relative trajectory of the movement of the valve flap 3. The extension portion 11 is provided with a fixing hole 12 adapted to the fixing rod 72. The fixing rod 72 has a snap-fitting groove 73 snap-fitting with the fixing block 71. The fixing block 71 constitutes the fixing of the fixing rod 72 on the extension portion 11. The second magnetic member 7 is fixedly arranged at one end of the fixing rod 72 opposite to the first magnetic member 6. The fixing block 71 includes an upper side portion 711, a connecting portion 712 and a lower side portion 713 connected end to end in sequence. The upper side portion 711, the connecting portion 712 and the lower side portion 713 form a connection with the extension portion 11. The connecting portion 712 is provided with a locking hole 76 for fixing the fixing block 71 to the extension portion 11. When installing the second magnetic component 7, the second magnetic component 7 is first fixed to the fixing rod 72, and then the fixing rod 72 is passed through the fixing hole 12, and then the fixing groove 75 of the fixing block 71 is opposite to the extension portion 11 and slid in. At this time, the locking portion of the fixing rod 72 is engaged with the fixing groove 75 of the fixing block 71, and finally a screw is passed through the locking hole 76 to fix the fixing component to the extension portion 11, thereby completing the installation of the second magnetic component 7.

[0020] A valve cover 9 is detachably provided on the valve body 1 . The valve cover 9 is provided with a sliding hole 91 for the vertical rod 81 to slide. One end of the compression spring 83 is located on the valve cover 9 , and the other end is located on the limit block 82 .

[0021] The inner wall of the flow channel 5 is provided with a nickel-plated layer 13, which has an anti-corrosion effect.

[0022] Specific implementation example: When the medium is not flowing, the valve flap 3 is against the valve seat 4 under the action of gravity. At this time, the compression spring 83 is compressed. Then, when the medium is flowing, the valve flap 3 is separated from and moves away from the valve seat 4 under the impact of the medium until the first magnetic part 6 and the second magnetic part 7 approach each other. Under the repulsive force of the first magnetic part 6 and the second magnetic part 7, the valve flap 3 will not collide with the valve body 1. At the same time, the valve flap 3 drives the vertical rod 81 to move upward, and the compression spring 83 is no longer compressed. When the medium is not flowing, the valve flap 3 approaches the valve seat 4 under the action of its own gravity and the repulsive force of the first magnetic part 6 and the second magnetic part 7. As the first magnetic part 6 and the second magnetic part 7 move away from each other, their repulsive force gradually disappears. At this time, as the vertical rod 81 moves downward, the compression spring 83 is compressed, reducing the force of the collision between the valve flap 3 and the valve seat 4, and protecting the valve flap 3 from damage.

Claims

1. A self-locking nickel check valve, comprising a valve body (1), a rocker arm (2), a valve disc (3) and a valve seat (4), wherein a flow channel (5) is arranged in the valve body (1), the valve seat (4) is arranged on the valve body (1), one end of the rocker arm (2) is hinged to the valve seat (4), and the other end is fixedly arranged on the valve disc (3), the valve disc (3) has a sealing state with the valve seat (4) to cut off the flow channel (5), and is characterized in that: The valve body (1) comprises a first magnetic component (6), a second magnetic component (7), a hinged rod (8) and a vertical rod (81), wherein the first magnetic component (6) is fixed to the other side of the rocker arm (2) relative to the valve seat (4), the second magnetic component (7) is arranged on the valve body (1) and is located on a relative trajectory of movement of the first magnetic component (6), the first magnetic component (6) and the second magnetic component (7) have a protective state of mutual repulsion when approaching each other, the vertical rod (81) is arranged on the valve body (1) along a vertical sliding direction, one end of the hinged rod (8) is hinged to the valve flap (3), and the other end is hinged to the vertical rod (81), the movement of the valve flap (3) constitutes the vertical sliding of the vertical rod (81), and the vertical rod (81) is provided with a limit block (82) located outside the valve body (1), and a compression spring (83) is provided between the limit block (82) and the valve body (1) for driving the limit block (82) to move in a direction away from the valve body (1).

2. A self-locking nickel check valve according to claim 1, characterized in that: The valve body (1) comprises an extension portion (11) opposite to the valve flap (3), and the extension portion (11) is located on a relative trajectory of movement of the valve flap (3); the extension portion (11) is provided with a fixing hole (12) matched with the fixing rod (72); the fixing rod (72) has a snap-fitting groove (73) snap-fitting with the fixing block (71); the fixing block (71) is used to fix the fixing rod (72) on the extension portion (11); and the second magnetic member (7) is provided at one end of the fixing rod (72) opposite to the first magnetic member (6).

3. A self-locking nickel check valve according to claim 2, characterized in that: The fixing block (71) comprises an upper side portion (711), a connecting portion (712) and a lower side portion (713) which are connected end to end in sequence; the upper side portion (711), the connecting portion (712) and the lower side portion (713) form a matching groove (74) adapted to the extension portion (11); the lower side portion (713) is provided with a fixing groove (75) engaged with the engaging groove (73); and the connecting portion (712) is provided with a locking hole (76) for fixing the fixing block (71) to the extension portion (11).

4. A self-locking nickel check valve according to claim 2, characterized in that: The valve body (1) is detachably provided with a valve cover (9), the valve cover (9) being provided with a sliding hole (91) for the vertical rod (81) to slide, one end of the compression spring (83) being located on the valve cover (9) and the other end being located on the limit block (82).

5. A self-locking nickel check valve according to claim 1, characterized in that: The inner wall of the flow channel (5) is provided with a nickel-plated layer (13).

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