Swing check valve

Abstract

The utility model discloses a swing check valve which comprises a valve body provided with a channel, a valve element cavity is formed in the middle of the valve body, a horizontally-arranged telescopic rod is arranged at the upper end of one side of the valve element cavity, a rotating shaft is arranged at the telescopic end of the telescopic rod, a mounting plate is rotationally arranged on the rotating shaft, a valve element is installed at the lower end of the side face of the mounting plate, and the valve element is connected with the valve element. The valve element comprises a sealing clamping plate capable of being movably clamped into the channel, and a cover plate connected with the mounting plate is arranged on one side of the sealing clamping plate. According to the swing check valve, when a medium normally flows, the sealing clamping plate is pushed to horizontally move by a certain distance and then rotates to complete the opening action, when the medium flows back, the sealing clamping plate is pushed to be clamped into the channel, the larger the acting force of the medium on the sealing clamping plate is, the better the sealing effect is, the leakage condition can be effectively avoided, the structure is simple, and the practicability is high. The sealing performance is good and the use is convenient.

Description

Technical Field

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

[0002] A swing check valve generally refers to a micro-stop check valve, also known as a non-return valve. Its function is to prevent the backflow of media in a pipeline. A check valve is a valve whose opening and closing mechanism automatically opens and closes based on the flow and force of the media to prevent backflow. Check valves are automatic valves primarily used in pipelines with unidirectional flow, allowing the media to flow in only one direction to prevent accidents.

[0003] Currently, existing swing check valve structures generally include a valve body, a sealing ring, a valve disc, and a rocker. The valve disc is mounted on the rocker and rotates with the rocker to separate the valve disc from the sealing ring, at which point the valve is in the open state. When there is no medium flow or when the medium is diverted, the valve disc engages with the sealing ring under the action of gravity or the thrust of the medium, thus closing the valve. However, the existing valve disc and sealing ring are only simply fitted and engaged, resulting in poor sealing and prone to leakage. Therefore, the present application provides a swing check valve to solve the above problem. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the existing defects and provide a swing check valve. When the medium flows normally, the sealing clamping plate is pushed to move horizontally for a distance and then rotated to complete the opening action. When the medium flows back, the sealing clamping plate is pushed to be clamped into the channel. The greater the force exerted by the medium on the sealing clamping plate, the better the sealing effect, which can effectively avoid leakage. The utility model has a simple structure, good sealing performance, and is easy to use, and can effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a swing check valve, comprising a valve body with a channel, a valve core cavity is provided in the middle of the valve body, a horizontally arranged telescopic rod is provided at the upper end of one side of the valve core cavity, the telescopic end of the telescopic rod is provided with a rotating shaft, a mounting plate is rotatably provided on the rotating shaft, a valve core is installed at the lower end of the side of the mounting plate, the valve core includes a sealing card plate that can be movably clipped to the inside of the channel, and a cover plate is provided on one side of the sealing card plate that is mounted and connected to the mounting plate.

[0006] As an optimal technical solution of the present invention, a screw is provided on the side of the cover plate away from the sealing card plate, the screw is movably inserted into the mounting hole at the lower end of the side of the mounting plate, and a nut is threadedly connected to the side of the screw.

[0007] As a preferred technical solution of the present invention, an annular groove is provided on a side of the sealing clamping plate close to the cover plate, and an annular rubber ring is movably sleeved inside the annular groove.

[0008] As an optimal technical solution of the present invention, the cross-sectional shape of the annular rubber ring is a right-angled trapezoid, and the length of the bottom side of the right-angled trapezoid away from the cover plate is less than the depth of the annular groove, and the length of the bottom side of the right-angled trapezoid close to the cover plate is greater than the depth of the annular groove.

[0009] As a preferred technical solution of the present invention, a mounting flange is provided at the upper middle end of the valve body, and a sealing cover plate is installed on the mounting flange.

[0010] As a preferred technical solution of the present invention, the upper surface of the mounting flange and the lower surface of the sealing cover plate are both provided with corresponding annular grooves, and a sealing ring is movably connected inside the annular groove.

[0011] As a preferred technical solution of the present invention, one end of the sealing card plate away from the cover plate is chamfered.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] The swing check valve of the utility model pushes the sealing card to move horizontally for a certain distance when the medium flows normally and then rotates it to complete the opening action. When the medium flows back, it pushes the sealing card to be connected to the channel, and the greater the force exerted by the medium on the sealing card, the better the sealing effect, which can effectively avoid leakage. It has a simple structure, good sealing performance and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the utility model;

[0015] Figure 2 It is a structural diagram of the valve core in this utility model.

[0016] In the figure: 1 valve body, 2 valve core chamber, 3 telescopic rod, 31 rotating shaft, 4 mounting plate, 5 cover plate, 51 sealing clamping plate, 52 annular groove, 53 annular rubber ring, 54 screw, 55 nut, 6 mounting flange, 7 sealing ring, 8 sealing cover plate. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] See also Figure 1-2The utility model provides a technical solution: a swing check valve, comprising a valve body 1 with a channel, a valve core cavity 2 is provided in the middle of the valve body 1, a horizontally arranged telescopic rod 3 is provided at the upper end of one side of the valve core cavity 2, and a rotating shaft 31 is provided at the telescopic end of the telescopic rod 3. A mounting plate 4 is rotatably provided on the rotating shaft 31, and a valve core is installed at the lower end of the side of the mounting plate 4. The valve core includes a sealing card plate 51 that can be movably connected to the inside of the channel, and a cover plate 5 that is installed and connected to the mounting plate 4 is provided on one side of the sealing card plate 51. When the medium flows normally, the sealing card plate 51 is pushed to move along the channel, and the sealing card plate 51 drives the telescopic rod 3 to extend through the cover plate 5, the mounting plate 4 and the rotating shaft 31. When the sealing card plate 51 is separated from the channel, the medium pushes the sealing card plate 51, the cover plate 5 and the mounting plate 4 to rotate around the rotating shaft 31, and the valve is opened.

[0019] Furthermore, a screw 54 is provided on the side of the cover plate 5 away from the sealing clamping plate 51 . The screw 54 is movably inserted into the mounting hole at the lower end of the side of the mounting plate 4 , and a nut 55 is threadedly connected to the side of the screw 54 .

[0020] Furthermore, an annular groove 52 is provided on the side of the sealing card plate 51 close to the cover plate 5, and an annular rubber ring 53 is movably sleeved inside the annular groove 52. When the medium flows back, the medium pushes the cover plate 5 and the sealing card plate 51 to move into the channel. At this time, the telescopic rod 3 is shortened and the sealing card plate 51 is inserted into the channel; as the pressure of the medium on the cover plate 5 and the sealing card plate 51 increases, the annular rubber ring 53 has a better sealing effect on the gap between the sealing card plate 51 and the channel, thereby preventing the medium from leaking through the gap between the sealing card plate 51 and the channel.

[0021] Furthermore, the cross-sectional shape of the annular rubber ring 53 is a right-angled trapezoid, and the length of the bottom side of the right-angled trapezoid away from the cover plate 5 is less than the depth of the annular groove 52, and the length of the bottom side of the right-angled trapezoid close to the cover plate 5 is greater than the depth of the annular groove 52, which can improve the sealing effect.

[0022] Furthermore, a mounting flange 6 is provided at the upper middle end of the valve body 1 , and a sealing cover plate 8 is mounted on the mounting flange 6 to facilitate the disassembly and assembly of the cover plate 5 .

[0023] Furthermore, the upper surface of the mounting flange 6 and the lower surface of the sealing cover plate 8 are both provided with corresponding annular grooves, and a sealing ring 7 is movably connected inside the annular groove to improve the sealing effect between the mounting flange 6 and the sealing cover plate 8.

[0024] Furthermore, one end of the sealing card plate 51 away from the cover plate 5 is chamfered to facilitate the insertion of the sealing card plate 51 into the channel.

[0025] When using:

[0026] When the medium flows normally, the sealing card plate 51 is pushed to move along the channel, and the sealing card plate 51 drives the telescopic rod 3 to extend through the cover plate 5, the mounting plate 4 and the rotating shaft 31;

[0027] When the sealing card plate 51 is separated from the channel, the medium pushes the sealing card plate 51, the cover plate 5 and the mounting plate 4 to rotate around the rotating shaft 31, and the valve is opened.

[0028] When the medium flows back, the medium pushes the cover plate 5 and the sealing card plate 51 to move into the channel. At this time, the telescopic rod 3 is shortened and the sealing card plate 51 is inserted into the channel.

[0029] As the pressure of the medium on the cover plate 5 and the sealing card plate 51 increases, the annular rubber ring 53 seals the gap between the sealing card plate 51 and the channel more effectively, thereby preventing the medium from leaking through the gap between the sealing card plate 51 and the channel.

[0030] When the medium of the utility model flows normally, it pushes the sealing card plate 51 to move horizontally for a distance and then rotates it to complete the opening action. When the medium flows back, it pushes the sealing card plate 51 to be clamped into the channel. The greater the force exerted by the medium on the sealing card plate 51, the better the sealing effect, which can effectively avoid leakage. It has a simple structure, good sealing performance and is easy to use.

[0031] The undisclosed parts of the present invention are all prior art, and their specific structures, materials and working principles will not be described in detail. Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A swing check valve, comprising a valve body (1) with a passage, characterized in that: A valve core cavity (2) is provided in the middle of the valve body (1), a telescopic rod (3) is provided at the upper end of one side of the valve core cavity (2), a rotating shaft (31) is provided at the telescopic end of the telescopic rod (3), a mounting plate (4) is rotatably provided on the rotating shaft (31), a valve core is installed at the lower end of the side of the mounting plate (4), the valve core includes a sealing card plate (51) that can be movably clamped to the interior of the channel, and a cover plate (5) is provided on one side of the sealing card plate (51) and is mounted and connected to the mounting plate (4).

2. The swing check valve according to claim 1, characterized in that: A screw rod (54) is provided on the side of the cover plate (5) away from the sealing clamp plate (51). The screw rod (54) is movably inserted into the mounting hole at the lower end of the side of the mounting plate (4), and a nut (55) is threadedly connected to the side of the screw rod (54).

3. The swing check valve according to claim 1, characterized in that: An annular groove (52) is provided on one side of the sealing clamping plate (51) close to the cover plate (5), and an annular rubber ring (53) is movably sleeved inside the annular groove (52).

4. The swing check valve according to claim 3, characterized in that: The cross-sectional shape of the annular rubber ring (53) is a right-angled trapezoid, and the length of the bottom side of the right-angled trapezoid away from the cover plate (5) is less than the depth of the annular groove (52), and the length of the bottom side of the right-angled trapezoid close to the cover plate (5) is greater than the depth of the annular groove (52).

5. The swing check valve according to claim 1, characterized in that: A mounting flange (6) is provided at the middle upper end of the valve body (1), and a sealing cover plate (8) is mounted on the mounting flange (6).

6. The swing check valve according to claim 5, characterized in that: The upper surface of the mounting flange (6) and the lower surface of the sealing cover plate (8) are both provided with corresponding annular grooves, and a sealing ring (7) is movably connected inside the annular groove.

7. The swing check valve according to claim 1, characterized in that: One end of the sealing card plate (51) away from the cover plate (5) is chamfered.

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