Pipeline backflow prevention stop gate valve

Abstract

The utility model discloses a pipeline anti-backflow stop gate valve which comprises a valve body, an inlet pipe and an outlet pipe, the inlet pipe and the outlet pipe are respectively fixed on the side face of the valve body, and the height of the inlet pipe is lower than that of the outlet pipe. A mounting base is arranged in the inlet pipe, a backflow baffle is rotationally connected to the mounting base, the mounting base is arranged at the topmost position in the inlet pipe, a check block is arranged on the side, close to the backflow baffle, of the mounting base, and the backflow baffle is rotationally connected to the side, away from the valve body, of the mounting base. According to the utility model, the mounting seat and the backflow baffle plate are arranged, and the backflow baffle plate can impact one side of the backflow baffle plate when a medium enters the inlet pipe, so that the backflow baffle plate rotates around the mounting seat to break through the inlet pipe, and the purpose of medium flowing is realized; in this way, the backflow baffle returns to the original position to block the inlet pipe again.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a pipeline anti-backflow stop gate valve. Background Art

[0002] The stop gate valve is usually called the stop valve. It is an industrial valve body commonly used in the industrial field. It mainly controls the flow of the medium in the pipeline. It closes and opens the channel by controlling the valve disc to achieve the function of precise control of the flow. The valve has good sealing performance.

[0003] When in use, the stop valve needs to open the valve disc to realize the passage so that the medium can be transmitted better. Generally, the stop valve transports the medium from a low place to a high place. Since the stop valve is always in an open state during transportation, when the medium pressure is low, it may cause backflow, affecting the normal transmission of the medium.

[0004] Therefore, how to provide a pipeline anti-backflow stop gate valve is a problem that technical personnel in this field urgently need to solve. Utility Model Content

[0005] One purpose of the utility model is to provide a pipeline anti-backflow stop gate valve, which solves the problem in the prior art that when the stop valve is opened to convey a medium, backflow may occur due to insufficient medium pressure.

[0006] According to an embodiment of the utility model, a pipeline backflow prevention stop gate valve includes a valve body, an inlet pipe and an outlet pipe, wherein the inlet pipe and the outlet pipe are respectively fixed on the sides of the valve body, and the height of the inlet pipe is lower than that of the outlet pipe; a mounting seat is arranged inside the inlet pipe, and a backflow baffle is rotatably connected to the mounting seat.

[0007] The mounting seat is arranged at the top position inside the inlet pipe, and a block is arranged on the side of the mounting seat close to the reflux baffle. The reflux baffle is rotatably connected to the side of the mounting seat away from the valve body, and the block is movably fitted to the side of the reflux baffle close to the valve body.

[0008] A baffle is provided on the inner wall of the inlet pipe at a position on the side of the reflux baffle away from the valve body and close to the bottom.

[0009] The inner wall of the inlet pipe is provided with a support assembly for stabilizing the reflux baffle at the position of the mounting seat.

[0010] The support assembly includes a track groove body, a slider, a fixed seat and a support rod. The track groove body is fixed to the inner wall of the inlet pipe at the top position, the slider is slidably connected to the track groove body, the fixed seat is fixed to the bottom of the slider, one end of the support rod is rotatably connected to the fixed seat, and the other end of the support rod is rotatably connected to a side of the reflux baffle close to the valve body.

[0011] The support assembly also includes a guide rod and a spring member. The guide rod is fixed inside the track groove body and is located on the symmetry axis of the track groove body. The spring member is movably sleeved on the surface of the guide rod. One end of the spring member moves on the side of the slider away from the reflux baffle, and the other end of the spring member is attached to a position inside the track groove body away from the reflux baffle.

[0012] The beneficial effects of the utility model are:

[0013] By setting a mounting seat and a reflux baffle, the reflux baffle will impact one side of the reflux baffle when the medium enters the inlet pipe, so that the reflux baffle rotates around the mounting seat to open the inlet pipe and achieve the purpose of medium flow. When reflux occurs, the refluxed medium will squeeze the other side of the reflux baffle, so that the reflux baffle returns to its original position and blocks the inlet pipe again. The reflux baffle is limited by the mounting seat, which solves the problem in the prior art that reflux may be caused due to insufficient medium pressure when the stop valve is opened to convey the medium.

[0014] By setting up a support assembly, the support assembly supports the reflux baffle, making it difficult for the reflux baffle to be pushed back by the reflux medium, thereby enhancing the strength of the reflux baffle. Another function of the support assembly is to increase the speed at which the reflux baffle blocks the inlet pipe, and to combine the spring component and the reflux medium to quickly push the reflux baffle back into place. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 The utility model is a schematic diagram of the overall three-dimensional structure of a pipeline anti-backflow stop gate valve.

[0017] Figure 2 The utility model provides a schematic cross-sectional three-dimensional structural diagram of the positions of a backflow baffle and a support assembly in a pipeline backflow prevention stop gate valve.

[0018] Figure 3 The utility model is a pipeline anti-backflow stop gate valve Figure 2 Schematic diagram of the enlarged structure of part A in the middle.

[0019] Figure 4 The utility model is a pipeline anti-backflow stop gate valve Figure 2 Schematic diagram of the enlarged structure of the middle B part

[0020] The attached drawings indicate: 1. valve body; 2. inlet pipe; 3. outlet pipe; 4. mounting seat; 5. reflux baffle; 6. block; 7. baffle bar; 8. track groove; 9. slider; 10. fixing seat; 11. support rod; 12. guide rod; 13. spring part. DETAILED DESCRIPTION

[0021] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0022] refer to Figure 1-4 In this embodiment, a valve body 1, an inlet pipe 2 and an outlet pipe 3 are included. The inlet pipe 2 and the outlet pipe 3 are respectively fixed on the side of the valve body 1, and the height of the inlet pipe 2 is lower than the height of the outlet pipe 3; a mounting seat 4 is provided inside the inlet pipe 2, and a reflux baffle 5 is rotatably connected to the mounting seat 4. The mounting seat 4 is arranged at the top position inside the inlet pipe 2, and a stopper 6 is provided on one side of the mounting seat 4 close to the reflux baffle 5. The stopper 6 is to increase the limit of the reflux baffle 5 to prevent the reflux baffle 5 from rotating in the direction away from the valve body 1 during the reflux activity. When the pressure difference between the reflux plate 5 and the inlet pipe 2 is too large, when backflow occurs, when the reflux baffle 5 contacts the block 6 and the baffle bar 7, the reflux baffle 5 is perpendicular to the inlet pipe 2, thereby blocking the inlet pipe 2 to prevent the medium inside the inlet pipe 2 from backflowing, and the reflux baffle 5 is rotatably connected to the side of the mounting seat 4 away from the valve body 1, and the block 6 is movably fitted to the side of the reflux baffle 5 close to the valve body 1. A baffle bar 7 is arranged on the inner wall of the inlet pipe 2 at a side of the reflux baffle 5 away from the valve body 1 and close to the bottom. The baffle bar 7 mainly blocks the side of the reflux baffle 5 away from the valve body 1. During the reflux process, the reflux baffle 5 recovers as shown in FIG. Figure 2 The reflux baffle 5 is blocked at the position shown, so that the reflux baffle 5 is in this position, which also increases the sealing between the reflux baffle 5 and the inlet pipe 2. During operation, when the medium enters, the medium will push the reflux baffle 5 to rotate around the mounting seat 4 toward the valve body 1, so that the inside of the inlet pipe 2 is opened, and stable medium transportation is achieved. When medium reflux occurs, the medium will push the reflux baffle 5 back. At this time, the reflux baffle 5 will rotate around the mounting seat 4 away from the valve body 1 under the action of the reverse thrust, until the reflux baffle 5 is blocked by the baffle bar 7 and the block 6, and then the reflux baffle 5 completely blocks the inlet pipe 2, so that the inside of the inlet pipe 2 is disconnected to avoid backflow.

[0023] refer to Figure 1-4In this embodiment, the inner wall of the inlet pipe 2 is located at the position of the mounting seat 4 and is provided with a support assembly for stabilizing the reflux baffle 5. The support assembly includes a track groove body 8, a slider 9, a fixing seat 10 and a support rod 11. The track groove body 8 is fixed to the inner wall of the inlet pipe 2 at the top position, the slider 9 is slidably connected to the track groove body 8, the fixing seat 10 is fixed to the bottom of the slider 9, one end of the support rod 11 is rotatably connected to the fixing seat 10, and the other end of the support rod 11 is rotatably connected to a side of the reflux baffle 5 close to the valve body 1. In order to further stabilize the activity of the reflux baffle 5 and increase the stability of the reflux baffle 5, a support assembly is provided here. During operation, the reflux baffle 5 is pushed to rotate around the mounting seat 4 under the medium conveying, and then the reflux baffle 5 rotates The movement will drive the support rod 11 to rotate and move, and the rotation of the support rod 11 will push the slider 9 to move in the direction close to the valve body 1 inside the track groove 8, thus improving the rotation stability of the reflux baffle 5. When reflux occurs, if the reflux medium quickly pushes the reflux baffle 5, the reflux baffle 5 will rotate away from the valve body 1 and pull the support rod 11 and the slider 9. When the reflux baffle 5 reaches the appropriate position, the support rod 11 and the slider 9 reach one end of the track groove 8 close to the mounting seat 4. At this time, the slider 9 is blocked. When the slider 9 is blocked and does not move, the reflux baffle 5 is pulled by the support rod 11, so that the reflux baffle 5 is in a state of just blocking the inlet pipe 2 and does not move, thereby avoiding the reflux baffle 5 from being broken by the fast reflux medium and increasing the structural strength of the reflux baffle 5.

[0024] The support assembly also includes a guide rod 12 and a spring member 13. The guide rod 12 is fixed inside the track slot 8 and is located on the symmetry axis of the track slot 8. The spring member 13 is movably sleeved on the surface of the guide rod 12. One end of the spring member 13 moves on the side of the slider 9 away from the reflux baffle 5, and the other end of the spring member 13 is attached to a position inside the track slot 8 away from the reflux baffle 5. In order to enable the reflux baffle 5 to quickly return to its position to block the reflux when reflux occurs, the spring member 13 will push the slider 9 through its own elastic force when reflux occurs, so that the slider 9 accelerates the slider 9. In this way, the accelerated sliding of the slider 9 will accelerate the return of the reflux baffle 5 through the support rod 11, thereby improving the return speed of the reflux baffle 5 and achieving the purpose of quickly and timely blocking the reflux.

[0025] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A pipeline anti-backflow stop gate valve, characterized in that: It comprises a valve body (1), an inlet pipe (2) and an outlet pipe (3), wherein the inlet pipe (2) and the outlet pipe (3) are respectively fixed to the side of the valve body (1), and the height of the inlet pipe (2) is lower than the height of the outlet pipe (3); A mounting seat (4) is provided inside the inlet pipe (2), and a reflux baffle (5) is rotatably connected to the mounting seat (4).

2. A pipeline anti-backflow stop gate valve according to claim 1, characterized in that: The mounting seat (4) is arranged inside the inlet pipe (2) at the topmost position, and a stopper (6) is arranged on a side of the mounting seat (4) close to the reflux baffle (5); the reflux baffle (5) is rotatably connected to a side of the mounting seat (4) away from the valve body (1), and the stopper (6) is movably fitted to a side of the reflux baffle (5) close to the valve body (1).

3. A pipeline anti-backflow stop gate valve according to claim 2, characterized in that: A baffle (7) is provided on the inner wall of the inlet pipe (2) at a position on the side of the reflux baffle (5) away from the valve body (1) and close to the bottom.

4. A pipeline anti-backflow stop gate valve according to claim 3, characterized in that: The inner wall of the inlet pipe (2) is provided with a support assembly for stabilizing the reflux baffle (5) at a position of the mounting seat (4).

5. A pipeline anti-backflow stop gate valve according to claim 4, characterized in that: The support assembly comprises a track groove body (8), a slider (9), a fixing seat (10) and a support rod (11); the track groove body (8) is fixed to the inner wall of the inlet pipe (2) at the topmost position; the slider (9) is slidably connected to the track groove body (8); the fixing seat (10) is fixed to the bottom of the slider (9); one end of the support rod (11) is rotatably connected to the fixing seat (10); and the other end of the support rod (11) is rotatably connected to a side surface of the reflux baffle (5) close to the valve body (1).

6. A pipeline anti-backflow stop gate valve according to claim 5, characterized in that: The support assembly further comprises a guide rod (12) and a spring member (13); the guide rod (12) is fixed inside the track groove body (8) and is located on the symmetry axis of the track groove body (8); the spring member (13) is movably sleeved on the surface of the guide rod (12); one end of the spring member (13) moves on a side of the slider (9) away from the reflux baffle (5); and the other end of the spring member (13) is attached to a position inside the track groove body (8) away from the reflux baffle (5).

Images