Slowly-closed swing check valve

Abstract

The utility model provides a slowly closed swing check valve, including valve body, feed pipe, discharge pipe, bonnet, buffer mechanism, limit mechanism, valve and seal ring, feed pipe and discharge pipe are respectively fixed on the outer side of valve body, and the upper end of valve body is fixed with bonnet, wherein the upper end of bonnet is fixed with buffer mechanism and limit mechanism; the output end of the buffer mechanism is connected with the valve, and the valve is fixed in the valve body; the sealing ring is fixed to the corresponding position of the inner wall of the valve body. Due to the arrangement of the buffering mechanism and the limiting mechanism, opening and closing of the valve can be buffered during use, so that violent collision between the valve and the valve body is avoided, and the valve can be locked.

Description

Technical Field

[0001] The utility model belongs to the technical field of check valves, and particularly relates to a slow-closing swing check valve. Background Technique

[0002] The swing check valve, as a core component in the fluid control system, plays a key role in controlling the unidirectional flow of fluids and preventing backflow. Its structure is delicate, covering multiple important components such as the valve body, inlet pipe, discharge pipe, valve cover, valve, and seal. These components work together to ensure the normal operation of the valve. With its excellent performance, the swing check valve has been widely used in many fields such as petroleum, chemical industry, electric power, metallurgy, and water treatment.

[0003] However, in the existing swing check valve technology, the closing mechanism of the valve mainly relies on the action of springs or gravity. Although this mechanism is simple and effective, it has obvious deficiencies. Specifically, due to the lack of a buffering function, the valve will generate a large impact when opening or closing, resulting in a collision between the valve and the valve body. This collision not only accelerates the wear of the valve and shortens its service life but may also have an adverse impact on the entire fluid system, such as generating noise, vibration, and even potentially causing system failures.

[0004] In addition, the existing swing check valve cannot lock the fully open or fully closed state of the valve, which means that in certain specific situations, such as when the system does not need to control the unidirectional flow of materials or the material flow needs to be paused, the valve cannot stably maintain the fully closed or fully open state.

[0005] Therefore, it is very necessary to invent a slow-closing swing check valve. Content of the Utility Model

[0006] The purpose of the utility model is to provide a slow-closing swing check valve to solve the problems mentioned in the background technique.

[0007] To solve the above technical problems, the utility model is realized through the following technical solutions:

[0008] The utility model is a slow-closing swing check valve, including a valve body, an inlet pipe, a discharge pipe, a valve cover, a buffering mechanism, a limiting mechanism, a valve, and a sealing ring. The outer side of the valve body is respectively fixed with an inlet pipe and a discharge pipe, and the other ends of the inlet pipe and the discharge pipe are respectively connected to the corresponding external pipes through flange plates; the upper end of the valve body is fixed with a valve cover through bolts, and the upper end of the valve cover is fixed with a buffering mechanism through bolts; the output end of the buffering mechanism is connected to the valve, and the valve is fixed inside the valve body; the sealing ring is fixed at the corresponding position on the inner wall of the valve body; two limiting mechanisms are symmetrically arranged outside the buffering mechanism, and the limiting mechanisms are rotatably connected to the valve cover through hinges.

[0009] Furthermore, the valve includes a positioning frame, a rotating plate and a valve flap. The positioning frame is fixed inside the valve body by bolts, and the other end of the positioning frame is rotatably installed with a rotating plate through a hinge. A valve flap is fixed to one side of the rotating plate close to the feed pipe by bolts; the diameter of the valve flap is larger than the inner diameter of the feed pipe. Such a setting can prevent the reverse conveyance of materials.

[0010] Furthermore, the buffer mechanism includes a rocker, a lifting column, a piston plate, a cylinder body, a return pipe and a top plate. One end of the rocker is rotatably connected to the rotating plate through a hinge, and the other end of the rocker is rotatably connected to the lifting column through a hinge; the lifting column seals and slides through the valve cover; the cylinder body is fixed to the upper end of the valve cover by bolts, and the lifting column seals and passes through the inside of the cylinder body; a piston plate is slidably arranged inside the cylinder body, and the piston plate is fixed to the lifting column by welding; the outer side surface of the upper end and the outer side surface of the lower end of the cylinder body are connected through a return pipe, and the inside of the cylinder body is filled with a liquid medium; the upper end of the lifting column is fixed with a top plate by bolts. Such a setting can buffer the opening and closing of the valve, thereby avoiding damage to the valve and the valve body due to violent collision.

[0011] Furthermore, at least one rubber ring is fixed to the outer side surface of the piston plate, and the outer side surface of the rubber ring is attached to the inner wall of the cylinder body. During use, it can prevent the liquid medium on the upper and lower sides of the piston plate from passing between the piston plate and the cylinder body.

[0012] Furthermore, the limiting mechanism includes a stud, a lifting sleeve and a limiting plate. The stud is rotatably connected to the valve cover through a hinge, and a lifting sleeve is installed on the outer side surface of the stud through thread engagement; the limiting plate is rotatably installed on the outer side surface of the lifting sleeve through a support bearing. Such a setting can lock the extreme position of the valve body.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. With the setting of the buffer mechanism of the utility model, when the valve is opened, under the cooperation of the rocker and the lifting column, the piston plate can be driven to move upward inside the cylinder body. At this time, the liquid medium above the piston plate will, under the action of the extrusion force, pass through the return pipe and enter below the piston plate, thereby buffering the opening of the valve. Similarly, when the valve is closed, the piston plate will be driven to move downward inside the cylinder body, so that the liquid medium below the piston plate will, under the action of the extrusion force, pass through the return pipe and enter above the piston plate, thereby buffering the opening of the valve. Through the above buffering during the opening and closing of the valve, the situation that the valve and the valve body are damaged due to violent collision is avoided.

[0015] 2. The provision of the limit mechanism of the utility model can erect the stud when locking the extreme closing position of the valve body, and then by rotating the lifting sleeve, the limit plate presses down on the top plate to prevent the valve from opening. When it is necessary to lock the extreme opening position of the valve body, the stud can be erected, and then by rotating the lifting sleeve, the limit plate jacks up the top plate to prevent the valve from closing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0017] Figure 1 is a schematic structural diagram of the present utility model.

[0018] Figure 2 is a full-sectional structural diagram of the present utility model.

[0019] Figure 3 is a schematic structural diagram of the valve of the present utility model.

[0020] Figure 4 is a schematic structural diagram of the buffer mechanism of the present utility model.

[0021] Figure 5 is a schematic structural diagram of the limit mechanism of the present utility model.

[0022] Figure 6 is a schematic structural diagram of the valve of the present utility model when it is opened.

[0023] In the figure:

[0024] 1 - valve body, 2 - feed pipe, 3 - discharge pipe, 4 - valve cover, 5 - buffer mechanism, 51 - rocker, 52 - lifting column, 53 - piston plate, 54 - cylinder block, 55 - return pipe, 56 - top plate, 6 - limit mechanism, 61 - stud, 62 - lifting sleeve, 63 - limit plate, 7 - valve, 71 - positioning frame, 72 - rotating plate, 73 - valve flap, 8 - sealing ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0026] In the description of the present utility model, it should be understood that the terms "upper", "middle", "outer", "inner", "around", etc. indicating the orientation or positional relationship are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present utility model.

[0027] Please refer to Figures 1 to 6 As shown, the present utility model is a slow-closing swing check valve, which includes a valve body 1, a feed pipe 2, a discharge pipe 3, a valve cover 4, a buffer mechanism 5, a limit mechanism 6, a valve 7 and a sealing ring 8. The outer side of the valve body 1 is respectively fixed with the feed pipe 2 and the discharge pipe 3, and the other ends of the feed pipe 2 and the discharge pipe 3 are respectively connected to the corresponding external pipes through flange plates; the upper end of the valve body 1 is fixed with the valve cover 4 by bolts, and the upper end of the valve cover 4 is fixed with the buffer mechanism 5 by bolts; the output end of the buffer mechanism 5 is connected to the valve 7, and the valve 7 is fixed inside the valve body 1; the sealing ring 8 is fixed at the corresponding position on the inner wall of the valve body 1; two limit mechanisms 6 are symmetrically arranged outside the buffer mechanism 5, and the limit mechanisms 6 are rotatably connected to the valve cover 4 through hinges.

[0028] Specifically, the valve 7 includes a positioning frame 71, a rotating plate 72 and a valve flap 73. The positioning frame 71 is fixed inside the valve body 1 by bolts, and the other end of the positioning frame 71 is rotatably installed with the rotating plate 72 through a hinge. A valve flap 73 is fixed on one side of the rotating plate 72 close to the feed pipe 2 by bolts; the diameter of the valve flap 73 is larger than the inner diameter of the feed pipe 2. When the material is conveyed into the valve body 1 through the feed pipe 2, the valve flap 73 and the rotating plate 72 will rotate around the positioning frame 71 under the impact force of the material, so that the material is discharged through the discharge pipe 3. When the impact force ends or the material enters the discharge pipe 3, the valve flap 73 can reset under its own gravity and the impact force of the material, and is arranged in contact with the sealing ring 8, so as to block the feed pipe 2.

[0029] Specifically, the buffer mechanism 5 includes a rocker 51, a lifting column 52, a piston plate 53, a cylinder block 54, a return pipe 55 and a top plate 56. One end of the rocker 51 is rotatably connected to the rotating plate 72 by means of a hinge, and the other end of the rocker 51 is rotatably connected to the lifting column 52 by means of a hinge; the lifting column 52 is hermetically slid through the valve cover 4; the cylinder block 54 is fixed to the upper end of the valve cover 4 by bolts, and the lifting column 52 hermetically passes through the interior of the cylinder block 54; a piston plate 53 is slidably arranged inside the cylinder block 54, and the piston plate 53 is fixed to the lifting column 52 by welding; the outer side surface of the upper end of the cylinder block 54 and the outer side surface of the lower end of the cylinder block 54 are connected and communicated by the return pipe 55, and the interior of the cylinder block 54 is filled with a liquid medium; the upper end of the lifting column 52 is fixed with a top plate 56 by bolts. When the valve 7 is opened, under the cooperation of the rocker 51 and the lifting column 52, the piston plate 53 can be driven to move upward inside the cylinder block 54. At this time, the liquid medium above the piston plate 53 will, under the action of the extrusion force, pass through the return pipe 55 and enter the lower end of the piston plate 53, thereby buffering the opening speed of the valve 7. In addition, when the valve 7 is closed, the piston plate 53 will be driven to move downward inside the cylinder block 54, so that the liquid medium at the lower end of the piston plate 53 will, under the action of the extrusion force, pass through the return pipe 55 and enter the upper end of the piston plate 53, thereby buffering the opening speed of the valve 7.

[0030] Specifically, at least one rubber ring is fixed to the outer side surface of the piston plate 53, and the outer side surface of the rubber ring is attached to the inner wall of the cylinder block 54. During use, it can prevent the liquid medium on both the upper and lower sides of the piston plate 53 from passing through between the piston plate 53 and the cylinder block 54.

[0031] Specifically, the limiting mechanism 6 includes a stud 61, a lifting sleeve 62 and a limiting plate 63. The stud 61 is rotatably connected to the valve cover 4 by means of a hinge, and the lifting sleeve 62 is installed on the outer side surface of the stud 61 by means of thread engagement; the limiting plate 63 is rotatably installed on the outer side surface of the lifting sleeve 62 by means of a support bearing. When locking the extreme closing position of the valve body 7, the stud 61 can be erected, and then by rotating the lifting sleeve 62, the limiting plate 63 can be made to squeeze the top plate 56 downward, thereby preventing the valve 7 from opening. When it is necessary to lock the extreme opening position of the valve body 7, the stud 61 can be erected, and then by rotating the lifting sleeve 62, the limiting plate 63 can be made to jack up the top plate 56 upward, thereby preventing the valve 7 from closing.

[0032] Please refer to Figures 1-6As shown in the figure, the utility model is a slow-closing swing check valve, and its working principle is as follows: when the material is conveyed into the interior of the valve body 1 through the feed pipe 2, the valve 7 will be opened under the action of the impact force of the material, so as to discharge the material through the discharge pipe 3. When the material is conveyed into the interior of the valve body 1 through the discharge pipe 3, the valve 7 can be automatically closed. Among them, the buffer mechanism 5 can buffer the opening and closing of the valve 7. Secondly, the limit mechanism 6 can lock the extreme opening or closing position of the valve 7.

[0033] In the description of this specification, the description referring to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0034] The preferred embodiments of the present utility model disclosed above are only used to help illustrate the present utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the present utility model to the specific embodiments described. Obviously, according to the content of this specification, many modifications and changes can be made. These embodiments are selected and specifically described in this specification in order to better explain the principle and practical application of the present utility model, so that those skilled in the technical field can well understand and utilize the present utility model. The present utility model is only limited by the claims and their full scope and equivalents.

Claims

1. A slow-closing swing check valve, comprising a valve body (1), a feed pipe (2), a discharge pipe (3), a valve cover (4), a buffer mechanism (5), a limit mechanism (6), a valve (7) and a sealing ring (8), characterized in that: The outer sides of the valve body (1) are respectively fixed with a feed pipe (2) and a discharge pipe (3), and the other ends of the feed pipe (2) and the discharge pipe (3) are connected to the corresponding external pipes through flange plates; the upper end of the valve body (1) is fixed with a valve cover (4), and a buffer mechanism (5) is fixed to the upper end of the valve cover (4); the output end of the buffer mechanism (5) is connected to a valve (7), and the valve (7) is fixed inside the valve body (1); the sealing ring (8) is fixed at the corresponding position on the inner wall of the valve body (1); two limiting mechanisms (6) are symmetrically arranged on the outer side of the buffer mechanism (5), and the limiting mechanisms (6) are rotatably connected to the valve cover (4) through hinges.

2. The slow-closing swing check valve according to claim 1, characterized in that: The valve (7) includes a positioning frame (71), a rotating plate (72) and a valve flap (73). The positioning frame (71) is fixed inside the valve body (1), and the other end of the positioning frame (71) is rotatably installed with a rotating plate (72) through a hinge. A valve flap (73) is fixed to one side of the rotating plate (72) close to the feed pipe (2); the diameter of the valve flap (73) is larger than the inner diameter of the feed pipe (2).

3. The slow-closing swing check valve according to claim 2, characterized in that: The buffer mechanism (5) includes a rocker (51), a lifting column (52), a piston plate (53), a cylinder block (54), a return pipe (55) and a top plate (56). One end of the rocker (51) is rotatably connected to the rotating plate (72), and the other end of the rocker (51) is rotatably connected to the lifting column (52) through a hinge; the lifting column (52) seals and slides through the valve cover (4); the cylinder block (54) is fixed to the upper end of the valve cover (4), and the lifting column (52) seals and passes through the inside of the cylinder block (54); a piston plate (53) is slidably arranged inside the cylinder block (54), and the piston plate (53) is fixed to the lifting column (52); the outer side of the upper end and the outer side of the lower end of the cylinder block (54) are connected and communicated through a return pipe (55), and the inside of the cylinder block (54) is filled with a liquid medium; the upper end of the lifting column (52) is fixed with a top plate (56).

4. The slow-closing swing check valve according to claim 3, characterized in that: At least one rubber ring is fixed to the outer side of the piston plate (53), and the outer side of the rubber ring is attached to the inner wall of the cylinder block (54).

5. The slow-closing swing check valve according to claim 4, characterized in that: The limiting mechanism (6) includes a stud (61), a lifting sleeve (62) and a limiting plate (63). The stud (61) is rotatably connected to the valve cover (4) through a hinge, and a lifting sleeve (62) is installed on the outer side of the stud (61) through thread engagement; a limiting plate (63) is rotatably installed on the outer side of the lifting sleeve (62).

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