Limiting device of swing check valve

Abstract

The utility model discloses a limiting device of a swing check valve, and relates to the technical field of check valves. Comprising a shell, the interior of the shell is hollow, a plurality of fixing pipes are arranged on the outer side of the shell, and the fixing pipes communicate with the shell; the sealing mechanism is arranged in the shell and used for controlling the flowing direction of the liquid, the sealing mechanism comprises a rotating part and a damping part, the rotating part is arranged in the shell and used for blocking the liquid, and the damping part is arranged on the outer side of the rotating part and used for providing resistance for the rotating part. Through the arrangement of the rotating piece and the damping piece, the moving speed of the cover plate is controlled through the cooperation of the fixing frame, the mounting shaft, the swing rod, the arc-shaped block, the sliding cavity, the sliding block and the connecting rod, and the situation that after a buffer block is broken, the cover plate and the shell directly and rigidly collide, and consequently the surface of the cover plate and the surface of the shell are abraded is avoided; and the sealing performance of the check valve is ensured.

Description

Technical Field

[0001] This utility model relates to the field of check valve technology, specifically to a limiting device for a swing check valve. Background Technology

[0002] Swing check valves, also known as one-way valves or non-return valves, are used to prevent backflow of media in pipelines. The opening and closing parts are automatically opened or closed by the flow and force of the media to prevent backflow. Check valves belong to the category of automatic valves and are mainly used in pipelines where the media flows in one direction only to prevent accidents.

[0003] In order to avoid direct collision between the cover plate and the housing during the use of existing check valves, most of them are equipped with a buffer block at the contact point between the cover plate and the housing. However, under long-term and frequent impact, the buffer block will be damaged such as cracking. The cracked and damaged buffer block can no longer block the cover plate and the housing, resulting in a direct rigid collision between the cover plate and the housing, causing wear on the surface of the cover plate and the housing, and reducing the sealing performance of the check valve. To address this, a limiting device for swing-open check valves is proposed. Utility Model Content

[0004] The purpose of this utility model is to solve the problem that buffer blocks will crack or be damaged under long-term and frequent impact forces. Cracked and damaged buffer blocks cannot block the cover plate and the shell, resulting in direct rigid collision between the cover plate and the shell, causing wear on the surface of the cover plate and the shell, and reducing the sealing performance of the check valve. This utility model provides a limiting device for swinging check valve.

[0005] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0006] A limiting device for a swing check valve, comprising:

[0007] The shell is hollow inside, and a plurality of fixing tubes are provided on the outside of the shell and are connected to the shell.

[0008] A sealing mechanism, disposed inside the housing, is used to control the direction of liquid flow. The sealing mechanism includes a rotating component and a damping component. The rotating component is disposed inside the housing to block the liquid, and the damping component is disposed outside the rotating component to provide resistance to the rotating component and control the rotation speed of the rotating component.

[0009] Furthermore, the rotating component includes a fixed frame connected to the housing. Inside the fixed frame, there is a mounting shaft and a swing rod arranged in sequence, and the swing rod rotates outside the mounting shaft. A cover plate is provided on the outside of the swing rod.

[0010] Furthermore, the damping element includes an arc-shaped block, which is arc-shaped and connected to a fixed frame. The swing rod rotates inside the arc-shaped block. A sliding cavity is provided inside the arc-shaped block, and a sliding block is provided inside the sliding cavity. The sliding block slides inside the sliding cavity. A connecting rod is provided between the sliding block and the swing rod. A first through hole and a mounting hole are respectively provided on the outer side of the arc-shaped block, and the first through hole and the mounting hole are connected to the sliding cavity. An adjusting element for controlling the flow rate is provided inside the mounting hole.

[0011] Furthermore, a spring is provided between the swing rod and the arc-shaped block, and the spring is sleeved on the outside of the connecting rod.

[0012] Furthermore, the adjusting component includes a fixing plate, which corresponds one-to-one with the mounting holes and is connected to the arc-shaped block. The fixing plate has at least one second through hole inside.

[0013] Furthermore, the fixed plate is also provided with a connecting shaft inside, and a rotating sleeve is sleeved on the outside of the connecting shaft, and the rotating sleeve rotates on the outside of the connecting shaft. A baffle is provided on the outside of the rotating sleeve.

[0014] The beneficial effects of this utility model are as follows:

[0015] This invention, through the arrangement of rotating and damping components, achieves control over the moving speed of the cover plate by cooperating with the fixed frame, mounting shaft, swing rod, arc block, sliding cavity, sliding block and connecting rod. This prevents the cover plate from directly colliding rigidly with the shell after the buffer block breaks, thus avoiding wear on the surface of the cover plate and the shell and ensuring the sealing performance of the check valve. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a partial sectional view of the casing of this utility model;

[0018] Figure 3 This is an enlarged view of the damping component of this utility model;

[0019] Figure 4 This is an enlarged view of the swing rod of this utility model;

[0020] Figure 5 This is an enlarged view of the arc-shaped block of this utility model;

[0021] Figure 6 This is an enlarged view of the adjusting component of this utility model;

[0022] Reference numerals: 1. Housing; 101. Fixed tube; 2. Rotating component; 201. Fixed frame; 202. Mounting shaft; 203. Swing rod; 204. Cover plate; 3. Damping component; 301. Arc-shaped block; 302. Sliding cavity; 303. Sliding block; 304. Connecting rod; 305. Spring; 306. First through hole; 307. Mounting hole; 4. Adjusting component; 401. Fixed plate; 402. Second through hole; 403. Connecting shaft; 404. Baffle; 405. Rotating sleeve. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0025] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power, and the main controller can be a conventional known device such as a computer that can control it.

[0027] In the description of the embodiments of this utility model, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] like Figures 1 to 6As shown, a limiting device for a swing check valve includes: a housing 1, the interior of which is hollow, and a fixing tube 101 is provided on the outside of the housing 1. Multiple fixing tubes 101 are connected to the housing 1. A sealing mechanism is disposed inside the housing 1 to control the direction of liquid flow. The sealing mechanism includes a rotating component 2 and a damping component 3. The rotating component 2 is disposed inside the housing 1 to block the liquid, and the damping component 3 is disposed outside the rotating component 2 to provide resistance to the rotating component 2. The damping component 3 also controls the rotation speed of the rotating component 2. Specifically, during use, the housing 1 is first installed on a pipeline via the fixing tube 101. Then, the direction of liquid flow is controlled by the rotating component 2 to prevent backflow. During the rotation of the rotating component 2, the damping component 3 controls the rotation speed of the rotating component 2 to prevent collision between the rotating component 2 and the housing 1, thereby extending the service life of the rotating component 2.

[0029] like Figures 1 to 6 As shown, the rotating component 2 includes a fixed frame 201, which is connected to the housing 1. Inside the fixed frame 201, there is a mounting shaft 202 and a swing rod 203 arranged in sequence. The swing rod 203 rotates outside the mounting shaft 202. A cover plate 204 is provided outside the swing rod 203. Specifically, the cover plate 204 can be controlled by liquid during use. When the liquid is flowing, the flowing liquid pushes the swing rod 203 to rotate upward, so that the liquid flows inside the housing 1. When the liquid stops flowing, the swing rod 203 will rotate in the opposite direction under the action of gravity, thereby blocking the fixed pipe 101 on the liquid inlet side and preventing the liquid from flowing backward. The fixed frame 201 and the housing 1 can be connected by bolts or pins, which facilitates timely replacement when the cover plate 204 is damaged.

[0030] like Figures 1 to 6As shown, the damping component 3 includes an arc-shaped block 301, which is connected to the fixed frame 201. The swing rod 203 rotates inside the arc-shaped block 301. A sliding cavity 302 is provided inside the arc-shaped block 301, and a sliding block 303 is provided inside the sliding cavity 302. The sliding block 303 slides inside the sliding cavity 302. A connecting rod 304 is provided between the sliding block 303 and the swing rod 203. A first through hole 306 and a mounting hole 307 are respectively provided on the outer side of the arc-shaped block 301, and the first through hole 306 and the mounting hole 307 are connected to the sliding cavity 302. An adjusting component 4 for controlling the flow rate is provided inside the mounting hole 307. Specifically, when the swing rod 203 rotates... During the process, the sliding block 303 is pushed to slide inside the sliding cavity 302 by the connecting rod 304. The sliding block 303 discharges and draws in the liquid inside the sliding cavity 302 through the mounting hole 307. During the discharge and drawing in of the liquid, it provides resistance to the swing rod 203, thereby slowing down the rotation speed of the swing rod 203 and preventing the cover plate 204 from colliding with the housing 1 during the movement, thereby extending the service life of the cover plate 204. The suction and discharge of liquid are achieved by swinging the swing rod 203 in different directions. During use, the first through hole 306 can guide the liquid on the other side of the sliding block 303 to ensure that the sliding block 303 can slide stably inside the sliding cavity 302.

[0031] like Figures 1 to 6 As shown, a spring 305 is also provided between the swing rod 203 and the arc block 301, and the spring 305 is sleeved on the outside of the connecting rod 304. Specifically, the spring 305 can provide a thrust to the swing rod 203 during use, ensuring that the housing 1 can stably block the liquid when it is installed at an angle.

[0032] like Figures 1 to 6 As shown, the adjusting component 4 includes a fixing plate 401, which corresponds one-to-one with the mounting holes 307 and is connected to the arc-shaped block 301. The fixing plate 401 has at least one second through hole 402 inside. Specifically, the flow rate of liquid entering and exiting the sliding cavity 302 is controlled by the cooperation of the fixing plate 401 and the second through hole 402, thereby adjusting the swing speed of the swing rod 203. The fixing plate 401 and the arc-shaped block 301 can be connected by a buckle or bolt. The size and number of the second through holes 402 can be selected according to the usage requirements.

[0033] like Figures 1 to 6As shown, the fixed plate 401 is also provided with a connecting shaft 403 inside, and a rotating sleeve 405 is sleeved on the outside of the connecting shaft 403. The rotating sleeve 405 rotates on the outside of the connecting shaft 403. A baffle 404 is provided on the outside of the rotating sleeve 405. Specifically, the rotation of the rotating sleeve 405 relative to the connecting shaft 403 controls the overlap range between the baffle 404 and the second through hole 402, thereby further controlling the flow rate of the liquid.

[0034] like Figures 1 to 6 As shown, the working state of the limiting device of the swing check valve is as follows: When the liquid flows, the swing rod 203 and the cover plate 204 will rotate under the push of the liquid. While the swing rod 203 rotates, the sliding block 303 is controlled to slide inside the sliding cavity 302 through the connecting rod 304. The sliding block 303 draws in and discharges liquid through the mounting hole 307. During the process of liquid drawing in and discharging, resistance is provided to the sliding block 303, thereby controlling the rotation speed of the swing rod 203, avoiding the cover plate 204 from colliding with the housing 1, thereby extending the service life of the cover plate 204.

[0035] In summary, this utility model includes: a housing 1, the interior of which is hollow, and a fixing tube 101 is provided on the outside of the housing 1. Multiple fixing tubes 101 are connected to the housing 1. A sealing mechanism is disposed inside the housing 1 to control the direction of liquid flow. The sealing mechanism includes a rotating component 2 and a damping component 3. The rotating component 2 is disposed inside the housing 1 to block the liquid, and the damping component 3 is disposed outside the rotating component 2 to provide resistance to the rotating component 2. The damping component 3 also controls the rotation speed of the rotating component 2. Through the arrangement of the rotating component 2 and the damping component 3, this utility model achieves control over the moving speed of the cover plate 204 through the cooperation of the fixing frame 201, mounting shaft 202, swing rod 203, arc block 301, sliding cavity 302, sliding block 303, and connecting rod 304. This prevents the cover plate 204 from directly colliding rigidly with the housing 1 after the buffer block breaks, thus avoiding wear on the surfaces of the cover plate 204 and the housing 1 and ensuring the sealing performance of the check valve.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A limiting device for a swing check valve, characterized in that, include: The shell is hollow inside, and a plurality of fixing tubes are provided on the outside of the shell and are connected to the shell. A sealing mechanism, disposed inside the housing, is used to control the direction of liquid flow. The sealing mechanism includes a rotating component and a damping component. The rotating component is disposed inside the housing to block the liquid, and the damping component is disposed outside the rotating component to provide resistance to the rotating component and control the rotation speed of the rotating component.

2. The limiting device for a swing check valve according to claim 1, characterized in that, The rotating component includes a fixed frame connected to the housing. Inside the fixed frame, there is a mounting shaft and a swing rod arranged in sequence, and the swing rod rotates outside the mounting shaft. A cover plate is provided on the outside of the swing rod.

3. The limiting device for a swing check valve according to claim 2, characterized in that, The damping component includes an arc-shaped block, which is connected to a fixed frame. The swing rod rotates inside the arc-shaped block. A sliding cavity is provided inside the arc-shaped block, and a sliding block is provided inside the sliding cavity. The sliding block slides inside the sliding cavity. A connecting rod is provided between the sliding block and the swing rod. A first through hole and a mounting hole are respectively provided on the outer side of the arc-shaped block, and the first through hole and the mounting hole are connected to the sliding cavity. An adjusting component for controlling the flow rate is provided inside the mounting hole.

4. The limiting device for a swing check valve according to claim 3, characterized in that, A spring is also provided between the swing rod and the arc-shaped block, and the spring is sleeved on the outside of the connecting rod.

5. The limiting device for a swing check valve according to claim 3, characterized in that, The adjusting component includes a fixing plate, which corresponds one-to-one with the mounting holes and is connected to the arc-shaped block. The fixing plate has at least one second through hole inside.

6. The limiting device for a swing check valve according to claim 5, characterized in that, The fixed plate is also provided with a connecting shaft inside, and a rotating sleeve is sleeved on the outside of the connecting shaft. The rotating sleeve rotates outside the connecting shaft, and a baffle is provided on the outside of the rotating sleeve.

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