Check valve

Abstract

The utility model discloses a check valve which comprises a check valve body, a valve pipe is connected to the check valve body, a valve deck is installed on the valve pipe, a screw is movably connected to the side wall of the valve deck, one end of the screw is connected with a nut, the nut is located below the valve deck, and a sealing gasket is placed at the top end of the valve pipe. An adjusting mechanism is arranged at the bottom end of the valve pipe; when the pressing plate is pulled upwards, the pressing plate compresses the adjusting spring upwards, so that the pressing plate crosses the top end of the sealing gasket, then the pressing plate is pushed into a clamping space between the bottom end of the valve cover and the sealing gasket under pushing of the sliding block, when the pressing plate is loosened, the sliding rod is pulled downwards by the adjusting spring, so that the pressing plate presses the sealing gasket downwards, and at the moment, the pressing plate is pushed to rotate; the pressing plate drives the sliding block to rotate through the sliding rod, the sliding block drives the circular ring to rotate along the circular groove through the connecting plate, the pressing plate can flatten the sealing gasket, and the effect of conveniently flattening the sealing gasket is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of check valve connection devices, in particular to a check valve. Background Technique

[0002] A check valve refers to a valve whose closing member is a circular valve flap and which blocks the reverse flow of the medium by its own weight and the action of the medium pressure. It belongs to the category of automatic valves and is also called a non-return valve, a one-way valve, a reflux valve or an isolation valve. The check valve is commonly used as the bottom valve of a pumping device and can prevent the backflow of water. When used in combination with a globe valve, it can play a role in safety isolation. However, its disadvantages are large resistance and poor sealing performance when closed.

[0003] When installing the valve core of a check valve, a sealing gasket is provided between the bottom end of the valve cover and the port connection of the valve pipe. When placing the sealing gasket, during daily installation, it is very easy to cause the sealing gasket not to be placed flat at the port of the valve pipe due to negligence. After the non-flatly placed sealing gasket is squeezed by the valve cover, gaps will be generated at the protruding parts of the sealing gasket, which is likely to cause the liquid in the check valve to leak from the valve pipe port. In this case, it is necessary to remove the valve cover and the valve core again to smooth the sealing gasket. Removing the valve core again is likely to cause the valve core to be knocked and damaged, and it is also time-consuming and laborious. Therefore, a check valve is needed to facilitate smoothing the sealing gasket. Content of the Utility Model

[0004] The purpose of the utility model is to provide a check valve to overcome the defect of inconvenience in smoothing the sealing gasket.

[0005] The technical solution to achieve the above purpose is: a check valve, including a check valve body, a valve pipe is connected to the check valve body, a valve cover is installed on the valve pipe, a screw is movably connected to the side wall of the valve cover, one end of the screw is connected with a nut, the nut is located below the valve cover, a sealing gasket is placed at the top end of the valve pipe, an adjusting mechanism is arranged at the bottom end of the valve pipe, a flattening mechanism is installed on the adjusting mechanism, the adjusting mechanism is used to adjust the position of the flattening mechanism, and the flattening mechanism is used to flatten the sealing gasket.

[0006] Preferably, a limiting spring is connected to the bottom end of the valve cover, a valve core is connected to the bottom end of the limiting spring, and the side wall of the valve core passes through the sealing gasket.

[0007] Preferably, the adjusting mechanism includes a circular groove, a circular ring, a connecting plate, a sliding hole and a screw rod. A circular groove is opened at the bottom end of the valve pipe, the inner side wall of the circular groove is slidably connected with a circular ring, a connecting plate is connected to the bottom end of the circular ring, a sliding hole is opened at the top end of the connecting plate, and a screw rod is threadedly connected to the side wall of the connecting plate.

[0008] Preferably, the shape of the circular groove is T-shaped.

[0009] Preferably, the side walls of the connecting plate are provided with rounded corners.

[0010] Preferably, the flattening mechanism includes a slider, an adjusting spring, a sliding rod, a through hole and a pressure plate, the side wall of the sliding hole is slidably connected to the slider, the top of the slider is provided with a through hole, the sliding rod is slidably connected in the through hole, the top of the sliding rod is connected to the pressure plate, the bottom end of the sliding rod is connected to the adjusting spring, the top of the adjusting spring is connected to the slider, and the side wall of the slider is rotatably connected to the screw rod.

[0011] Preferably, the sliding block is in an I-shape, a connecting block is connected in the through hole, a square groove is formed on the side wall of the sliding rod, and the square groove is slidably connected to the connecting block.

[0012] Preferably, a rubber pad is connected to the top side wall of the pressing plate.

[0013] The beneficial effects of the utility model are:

[0014] 1) Pull the pressure plate upward, the pressure plate will compress the adjusting spring upward, so that the pressure plate passes over the top of the sealing gasket, and then, under the push of the slider, the pressure plate is pushed into the gap between the bottom end of the valve cover and the sealing gasket. Release the pressure plate, and the slide bar will be pulled downward by the adjusting spring, so that the pressure plate presses the sealing gasket downward. At this time, push the pressure plate to rotate again, and the pressure plate drives the slider to rotate through the slide bar. The slider drives the ring to rotate along the circular groove through the connecting plate, so that the pressure plate can smooth the sealing gasket, achieving the effect of conveniently smoothing the sealing gasket. If the sealing gasket is too thin, at this time, you need to press the pressure plate downward so that the pressure plate can press the sealing gasket, and then rotate the pressure plate to achieve the smoothing effect of the pressure plate on the sealing gasket.

[0015] 2) Turn the screw rod, and the screw rod drives the slider to move toward the sealing gasket, so that the slider can push the slide rod through the through hole, and then the pressure plate extends into the gap between the bottom end of the valve cover and the sealing gasket, which is convenient for the pressure plate to smooth the sealing gasket. The pressure plate can be pulled out by reverse operation, so that the pressure plate will not hinder the fixed installation of the valve cover on the valve pipe, thereby achieving the effect of facilitating the adjustment of the position of the pressure plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the top view structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the structure of the utility model when viewed from above;

[0018] Figure 3 It is a schematic diagram of the partial explosion structure of the utility model when viewed from above;

[0019] Figure 4 It is a schematic diagram of the partial explosion top view structure of the utility model;

[0020] Figure 5It is a schematic diagram of the explosion structure of the adjusting mechanism of the present utility model;

[0021] Figure 6 It is Figure 1 the enlarged structure schematic diagram of part A in

[0022] Figure 7 It is Figure 2 the enlarged structure schematic diagram of part B in

[0023] Figure 8 It is Figure 3 the enlarged structure schematic diagram of part C in

[0024] Figure 9 It is Figure 4 the enlarged structure schematic diagram of part D in

[0025] Figure 10 It is Figure 5 the enlarged structure schematic diagram of part E in

[0026] Reference numerals in the attached drawings:

[0027] 1. Check valve body; 2. Valve pipe; 3. Valve cover; 4. Screw; 5. Sealing gasket; 6. Adjusting mechanism; 601. Circular groove; 602. Ring; 603. Connecting plate; 604. Slide hole; 605. Screw rod; 7. Flattening mechanism; 701. Slide block; 702. Adjusting spring; 703. Slide rod; 704. Through hole; 705. Pressing plate. Detailed implementation manners

[0028] Next, the technical solution of the present utility model will be clearly and completely described with reference to the accompanying drawings. In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model 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 should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0029] Next, the present utility model will be further described with reference to the accompanying drawings.

[0030] Refer to the attached Figures 1-10, A check valve, comprising a check valve body 1, a valve pipe 2 is connected to the check valve body 1, a valve cover 3 is installed on the valve pipe 2, a limit spring is connected to the bottom end of the valve cover 3, a valve core is connected to the bottom end of the limit spring, the side wall of the valve core passes through a sealing gasket 5, a screw 4 is movably connected to the side wall of the valve cover 3, one end of the screw 4 is connected with a nut, the nut is located below the valve cover 3, a sealing gasket 5 is placed at the top end of the valve pipe 2, an adjusting mechanism 6 is arranged at the bottom end of the valve pipe 2, a flattening mechanism 7 is installed on the adjusting mechanism 6, the adjusting mechanism 6 is used for adjusting the position of the flattening mechanism 7, and the flattening mechanism 7 is used for flattening the sealing gasket 5.

[0031] Reference appendix Figures 5-7 , The adjusting mechanism 6 includes a circular groove 601, a circular ring 602, a connecting plate 603, a sliding hole 604 and a screw rod 605. A circular groove 601 is opened at the bottom end of the valve pipe 2, the inner side wall of the circular groove 601 is slidably connected with a circular ring 602, the bottom end of the circular ring 602 is connected with a connecting plate 603, a sliding hole 604 is opened at the top end of the connecting plate 603, the side wall of the connecting plate 603 is threadedly connected with a screw rod 605, the shape of the circular groove 601 is T-shaped, and a fillet is opened on the side wall of the connecting plate 603.

[0032] Unscrew the screw 4 and pull it up a little so that the pressing plate 705 can extend into the gap between the bottom end of the valve cover 3 and the sealing gasket 5. At this time, rotate the screw rod 605, the screw rod 605 drives the slider 701 to move towards the sealing gasket 5, so that the slider 701 can push the sliding rod 703 through the through hole 704, and then the pressing plate 705 extends into the gap between the bottom end of the valve cover 3 and the sealing gasket 5, facilitating the flattening of the sealing gasket 5 by the pressing plate 705. Reverse the operation to pull out the pressing plate 705 so that the pressing plate 705 does not hinder the fixed installation of the valve cover 3 on the valve pipe 2, achieving the effect of facilitating the adjustment of the position of the pressing plate 705.

[0033] Reference appendix Figures 5-10 , The flattening mechanism 7 includes a slider 701, an adjusting spring 702, a sliding rod 703, a through hole 704 and a pressing plate 705. The side wall of the sliding hole 604 is slidably connected with a slider 701, a through hole 704 is opened at the top end of the slider 701, a sliding rod 703 is slidably connected in the through hole 704, the top end of the sliding rod 703 is connected with a pressing plate 705, the bottom end of the sliding rod 703 is connected with an adjusting spring 702, the top end of the adjusting spring 702 is connected with the slider 701, the shape of the slider 701 is I-shaped, a connecting block is connected in the through hole 704, a square groove is opened on the side wall of the sliding rod 703, and the square groove is slidably connected with the connecting block. A rubber pad is connected to the top side wall of the pressing plate 705, and the side wall of the slider 701 is rotatably connected with the screw rod 605.

[0034] Before the pressing plate 705 extends into the gap between the bottom end of the valve cover 3 and the sealing gasket 5, pull the pressing plate 705 upward. The pressing plate 705 will compress the adjusting spring 702 upward, causing the pressing plate 705 to cross over the top end of the sealing gasket 5. Then, under the push of the slider 701, the pressing plate 705 is pushed into the gap between the bottom end of the valve cover 3 and the sealing gasket 5. Release the pressing plate 705, and the sliding rod 703 will be pulled downward by the adjusting spring 702, causing the pressing plate 705 to press the sealing gasket 5 downward. At this time, push the pressing plate 705 to rotate again. The pressing plate 705 drives the slider 701 to rotate through the sliding rod 703, and the slider 701 drives the circular ring 602 to rotate along the circular groove 601 through the connecting plate 603, enabling the pressing plate 705 to smooth the sealing gasket 5, achieving the effect of conveniently smoothing the sealing gasket 5. If the sealing gasket 5 is too thin, at this time, it is necessary to press the pressing plate 705 downward so that the pressing plate 705 can press the sealing gasket 5. Then, rotate the pressing plate 705 again to achieve the smoothing effect of the pressing plate 705 on the sealing gasket 5.

[0035] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A check valve, comprising a check valve body (1), a valve tube (2) connected to the check valve body (1), a valve cover (3) mounted on the valve tube (2), a screw (4) movably connected to the side wall of the valve cover (3), a nut connected to one end of the screw (4), the nut being located below the valve cover (3), characterized in that: A sealing gasket (5) is placed at the top end of the valve tube (2), an adjusting mechanism (6) is provided at the bottom end of the valve tube (2), a flattening mechanism (7) is installed on the adjusting mechanism (6), the adjusting mechanism (6) is used to adjust the position of the flattening mechanism (7), and the flattening mechanism (7) is used to flatten the sealing gasket (5); The regulating mechanism (6) comprises a circular groove (601), a circular ring (602), a connecting plate (603), a sliding hole (604) and a screw (605); the bottom end of the valve tube (2) is provided with a circular groove (601); the inner side wall of the circular groove (601) is slidably connected with a circular ring (602); the bottom end of the circular ring (602) is connected with a connecting plate (603); the top end of the connecting plate (603) is provided with a sliding hole (604); the side wall of the connecting plate (603) is threadedly connected with a screw (605); The flattening mechanism (7) comprises a slider (701), an adjusting spring (702), a sliding rod (703), a through hole (704) and a pressure plate (705); the side wall of the sliding hole (604) is slidably connected to the slider (701); the top of the slider (701) is provided with a through hole (704); the inside of the through hole (704) is slidably connected to the sliding rod (703); the top of the sliding rod (703) is connected to the pressure plate (705); the bottom end of the sliding rod (703) is connected to the adjusting spring (702); the top of the adjusting spring (702) is connected to the slider (701); and the side wall of the slider (701) is rotatably connected to the screw rod (605).

2. A check valve according to claim 1, characterized in that: The bottom end of the valve cover (3) is connected to a limit spring, the bottom end of the limit spring is connected to a valve core, and the side wall of the valve core passes through a sealing gasket (5).

3. A check valve according to claim 1, characterized in that: The circular groove (601) is in a T-shape.

4. A check valve according to claim 1, characterized in that: The side wall of the connecting plate (603) is provided with rounded corners.

5. A check valve according to claim 1, characterized in that: The sliding block (701) is in an I-shape, a connecting block is connected in the through hole (704), a square groove is provided on the side wall of the sliding rod (703), and the square groove is slidably connected to the connecting block.

6. A check valve according to claim 1, characterized in that: The top side wall of the pressing plate (705) is connected with a rubber pad.

Images