Slow-closing type check valve

Abstract

The slowly-closed check valve comprises a valve body, the top of the outer surface of the valve body is fixedly connected with a fixing cover, the middle end of the left side of the fixing cover is movably connected with a rotating cylinder through a bearing, the middle end of the right side of the rotating cylinder is movably connected with a rotating shaft, and the right side of the rotating shaft is fixedly provided with a second bevel gear; a rotating disc is fixedly connected to the left end of the rotating shaft, a second spring is fixedly connected between the right side of the rotating disc and the right side of the inner cavity of the rotating cylinder, and a screw rod is movably connected to the middle end of the top of the valve body through a bearing. According to the slow-opening and slow-closing check valve, the valve body, the through hole, the valve clack, the partition plate, the movable disc and the first spring are arranged, so that the slow-opening and slow-closing effects of the slow-opening and slow-closing check valve are achieved, and by arranging the rotating shaft, a second bevel gear, a rotating disc, a second spring, a first bevel gear, a rotating cylinder, a fixing cover, a screw rod, the movable disc, the first spring and the valve clack, the slow-opening and slow-closing effects are achieved; and the effect of adjusting the opening pressure of the valve clack is achieved.

Description

Technical Field

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

[0002] A check valve is a valve whose opening and closing part is a circular disc and which relies on its own weight and medium pressure to produce movement to block the backflow of the medium. It is an automatic valve and is also called a non-return valve, one-way valve, reflux valve or isolation valve. The disc movement modes are divided into lifting type and swing type.

[0003] For example, the Chinese utility model provides "a slow-closing check valve", and its announcement number is: CN212584338U. The application includes a valve stem, a spring, and a valve disc that are axially movable relative to the valve body, and a buffer cylinder for slow opening and closing. The utility model valve has a simple structure. The opening and closing speed of the valve disc is limited by the buffer valve stem installed in the buffer chamber on the valve body, so as to achieve slow opening and slow closing of the valve and reduce the wear caused by the valve disc impacting the valve body. The practical valve has excellent control effects for both slow opening and slow closing. It has an extremely simple structure and an extremely convenient operation mode. It can adapt to various requirements and has great promotion value. Although the slow-closing check valve in the above technology has a good slow closing effect, due to the use of a spring to support the valve disc, the opening pressure of the valve disc is fixed during use, which is not convenient for personnel to effectively adjust the pressure required to open the valve disc according to needs, and cannot meet the use needs of personnel. Utility Model Content

[0004] The utility model aims to provide a slow-closing check valve, which has the advantage of being easy for personnel to adjust the pressure of opening the valve disc according to needs, which is convenient for personnel to use. It solves the problem that the slow-closing check valve in the above-mentioned technology has a good slow-closing effect, but because the valve disc is supported by a spring, the opening pressure of the valve disc is fixed during use, which makes it inconvenient for personnel to effectively adjust the pressure required to open the valve disc according to needs.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a slow-closing check valve, comprising a valve body, a fixed cover is fixedly connected to the top of the outer surface of the valve body, the middle end of the left side of the fixed cover is movably connected to a rotating cylinder through a bearing, the middle end of the right side of the rotating cylinder is movably connected to a rotating shaft, the right side of the rotating shaft is fixedly installed with a second bevel gear, the left end of the rotating shaft is fixedly connected with a rotating disk, the right side of the rotating disk and the right side of the rotating cylinder inner cavity are fixedly connected with a second spring, the middle end of the top of the valve body is movably connected with a screw through a bearing, the top of the screw is fixedly installed with a first bevel gear, the lower end of the screw is threadedly connected with a moving disk, the middle end of the bottom of the moving disk is fixedly connected with a first spring, the bottom of the first spring is fixedly connected with a valve disc, the middle end of the inner cavity of the valve body is fixedly connected with a partition, the bottom of the valve disc is movably connected to the middle end of the top of the partition, and the middle end of the partition is provided with a through hole.

[0006] As a preferred solution, a rubber ring is fixedly connected to the middle end of the top of the valve body, and the surface of the screw is movably connected to the surface of the rubber ring.

[0007] As a preferred solution, a support shaft is fixedly mounted on the middle end of the top of the first bevel gear, and the top of the support shaft is movably connected to the middle end of the top of the inner cavity of the fixed cover through a bearing.

[0008] As a preferred embodiment, both ends of the top of the inner cavity of the valve body are fixedly connected with guide rods, the surface of the movable disk is movably connected to the surface of the guide rods, and both ends of the top of the valve disc are fixedly connected with guide plates, and the surface of the guide plates is movably connected to the lower end of the guide rods.

[0009] As a preferred solution, the lower end of the left side of the valve body is fixedly connected to a water inlet pipe, and the upper end of the right side of the valve body is fixedly connected to a drain pipe.

[0010] As a preferred solution, both ends of the inner cavity of the rotating drum are fixedly connected with guide rods, and the surface of the rotating disk is movably connected to the surface of the guide rods.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0012] 1. The utility model realizes the effect of slow opening and slow closing of the check valve through the arrangement of the valve body, the through hole, the valve disc, the partition, the movable disk and the first spring, and achieves the effect of adjusting the opening pressure of the valve disc through the arrangement of the rotating shaft, the second bevel gear, the rotating disk, the second spring, the first bevel gear, the rotating cylinder, the fixed cover, the screw, the movable disk, the first spring and the valve disc.

[0013] 2. The utility model improves the sealing performance of the connection between the screw and the valve body by setting the rubber ring, achieves the purpose of stably supporting the top of the first bevel gear by setting the support shaft, achieves the purpose of supporting and guiding the movable disk and the valve disc by setting the guide rod and the guide plate, and avoids the movable disk and the valve disc from tilting or rotating during the movement, and facilitates the connection between the valve body and the external pipeline by setting the water inlet pipe and the drain pipe, and achieves the purpose of guiding the turntable by setting the guide rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional diagram of the utility model;

[0015] Figure 2 This is a schematic diagram of the cross-sectional structure of the valve body of the utility model;

[0016] Figure 3 It is a schematic diagram of the cross-sectional structure of the rotary drum of the utility model.

[0017] In the figure: 1, valve body; 2, water inlet pipe; 3, rotating shaft; 4, rotating drum; 5, fixed cover; 6, drain pipe; 7, first bevel gear; 8, supporting shaft; 9, second bevel gear; 10, moving plate; 11, guide plate; 12, partition; 13, valve disc; 14, through hole; 15, first spring; 16, guide rod; 17, screw; 18, rubber ring; 19, rotating disk; 20, guide rod; 21, second spring. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-3A slow-closing check valve comprises a valve body 1, a fixed cover 5 is fixedly connected to the top of the outer surface of the valve body 1, a rotating drum 4 is movably connected to the middle end of the left side of the fixed cover 5 through a bearing, a rotating shaft 3 is movably connected to the middle end of the right side of the rotating drum 4, a second bevel gear 9 is fixedly installed on the right side of the rotating shaft 3, a rotating disk 19 is fixedly connected to the left end of the rotating shaft 3, a second spring 21 is fixedly connected between the right side of the rotating disk 19 and the right side of the inner cavity of the rotating drum 4, a screw rod 17 is movably connected to the middle end of the top of the valve body 1 through a bearing, a first bevel gear 7 is fixedly installed on the top of the screw rod 17, a movable disk 10 is threadedly connected to the lower end of the screw rod 17, a first spring 15 is fixedly connected to the middle end of the bottom of the movable disk 10, a valve disc 13 is fixedly connected to the bottom of the first spring 15, a partition 12 is fixedly connected to the middle end of the inner cavity of the valve body 1, the bottom of the valve disc 13 is movably connected to the middle end of the top of the partition 12, and a through hole 14 is opened at the middle end of the partition 12.

[0020] Through the above technical scheme, through the arrangement of the valve body 1, the through hole 14, the valve disc 13, the partition 12, the movable disk 10 and the first spring 15, the effect of slow opening and slow closing of the check valve is achieved, and through the arrangement of the rotating shaft 3, the second bevel gear 9, the rotating disk 19, the second spring 21, the first bevel gear 7, the rotating cylinder 4, the fixed cover 5, the screw 17, the movable disk 10, the first spring 15 and the valve disc 13, the effect of adjusting the opening pressure of the valve disc 13 is achieved.

[0021] A rubber ring 18 is fixedly connected to the middle end of the top of the valve body 1 , and the surface of the screw rod 17 is movably connected to the surface of the rubber ring 18 .

[0022] Through the above technical solution and the provision of the rubber ring 18 , the sealing performance of the connection between the screw 17 and the valve body 1 is improved.

[0023] A support shaft 8 is fixedly mounted at the middle end of the top of the first bevel gear 7 , and the top of the support shaft 8 is movably connected to the middle end of the top of the inner cavity of the fixed cover 5 through a bearing.

[0024] Through the above technical solution and the provision of the support shaft 8, the purpose of stably supporting the top of the first bevel gear 7 is achieved.

[0025] Both ends of the top of the inner cavity of the valve body 1 are fixedly connected with guide rods 16, the surface of the movable disk 10 is movably connected to the surface of the guide rod 16, and both ends of the top of the valve disc 13 are fixedly connected with guide plates 11, and the surface of the guide plate 11 is movably connected to the lower end of the guide rod 16.

[0026] Through the above technical solution, by setting the guide rod 16 and the guide plate 11, the purpose of supporting and guiding the movable disk 10 and the valve flap 13 is achieved, thereby preventing the movable disk 10 and the valve flap 13 from tilting or rotating during the movement.

[0027] The lower end of the left side of the valve body 1 is fixedly connected with a water inlet pipe 2 , and the upper end of the right side of the valve body 1 is fixedly connected with a drain pipe 6 .

[0028] Through the above technical solution, by providing the water inlet pipe 2 and the drain pipe 6, it is convenient for personnel to connect the valve body 1 with external pipelines.

[0029] Both ends of the inner cavity of the rotating drum 4 are fixedly connected with guide rods 20 , and the surface of the rotating disk 19 is movably connected to the surface of the guide rods 20 .

[0030] Through the above technical solution and the provision of the guide rod 20, the purpose of guiding the turntable 19 is achieved.

[0031] The working principle of the utility model is as follows: when the external water flows through the inside of the valve body 1, the valve flap 13 can be gradually pushed upward through the through hole 14 under the action of the water pressure, so that the valve flap 13 can be separated from the top of the partition 12 and the first spring 15 at the bottom of the movable plate 10 is compressed. At the same time, the water can flow into the top of the partition 12 through the through hole 14 and can be discharged to the outside. When the water pressure below the valve flap 13 gradually decreases, the valve flap 13 can be gradually pushed downward under the push of the tension of the first spring 15. The valve disc 13 is moved until the bottom of the valve disc 13 can contact the top of the partition 12, so that the through hole 14 on the partition 12 can be effectively closed, which effectively prevents the water above the partition 12 from flowing back to the bottom of the partition 12, thereby achieving the effect of slow opening and slow closing of the check valve, and when the opening pressure needs to be adjusted, the second bevel gear 9 and the rotating disk 19 can be driven to move by pushing the rotating shaft 3 to the right, and the rotating disk 19 can compress the second spring 21 while moving until the second bevel gear 9 is closed. After the bevel gear 9 can contact the surface of the first bevel gear 7, the rotation of the rotating shaft 3 by the personnel can drive the second bevel gear 9, the rotating disk 19, the second spring 21 and the rotating drum 4 to rotate along the bearing on the fixed cover 5, and the rotation of the second bevel gear 9 can drive the first bevel gear 7 and the screw 17 to rotate. The rotation of the screw 17 can drive the movable disk 10 to move downward, and the movement of the movable disk 10 can compress the first spring 15, and the pressure applied by the first spring 15 to the valve disc 13 can be adjusted, thereby achieving the effect of adjusting the opening pressure of the valve disc 13. Subsequently, the personnel stop pushing the rotating shaft 3 and under the push of the second spring 21, the rotating disk 19, the rotating shaft 3 and the second bevel gear 9 can be pushed to move, and the second bevel gear 9 can be separated from the surface of the first bevel gear 7, which effectively avoids the personnel from accidentally touching the rotating shaft 3 to rotate, causing the screw 17 to rotate and the movable disk 10 to move, and causing the opening pressure of the valve disc 13 to change, thereby ensuring the stability of the overall use of the check valve, and facilitating the use of personnel.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the utility model.

Claims

1. A slow-closing check valve, comprising a valve body (1), characterized in that: The top of the outer surface of the valve body (1) is fixedly connected to a fixed cover (5), the middle end of the left side of the fixed cover (5) is movably connected to a rotating drum (4) through a bearing, the middle end of the right side of the rotating drum (4) is movably connected to a rotating shaft (3), the right side of the rotating shaft (3) is fixedly installed with a second bevel gear (9), the left end of the rotating shaft (3) is fixedly connected to a rotating disk (19), the right side of the rotating disk (19) and the right side of the inner cavity of the rotating drum (4) are fixedly connected with a second spring (21), the middle end of the top of the valve body (1) is movably connected to A screw rod (17), the top of which is fixedly mounted a first bevel gear (7), the lower end of which is threadedly connected to a movable disk (10), the middle end of the bottom of which is fixedly connected to a first spring (15), the bottom of which is fixedly connected to a valve flap (13), the middle end of the inner cavity of the valve body (1) is fixedly connected to a partition (12), the bottom of which is movably connected to the middle end of the top of the partition (12), and a through hole (14) is provided at the middle end of the partition (12).

2. A slow closing check valve according to claim 1, characterized in that: A rubber ring (18) is fixedly connected to the middle end of the top of the valve body (1), and the surface of the screw rod (17) is movably connected to the surface of the rubber ring (18).

3. A slow closing check valve according to claim 1, characterized in that: A support shaft (8) is fixedly mounted at the middle end of the top of the first bevel gear (7), and the top of the support shaft (8) is movably connected to the middle end of the top of the inner cavity of the fixed cover (5) through a bearing.

4. A slow closing check valve according to claim 1, characterized in that: Both ends of the top of the inner cavity of the valve body (1) are fixedly connected to guide rods (16), the surface of the movable disk (10) is movably connected to the surface of the guide rod (16), and both ends of the top of the valve flap (13) are fixedly connected to guide plates (11), and the surface of the guide plate (11) is movably connected to the lower end of the guide rod (16).

5. A slow closing check valve according to claim 1, characterized in that: The lower end of the left side of the valve body (1) is fixedly connected to a water inlet pipe (2), and the upper end of the right side of the valve body (1) is fixedly connected to a drain pipe (6).

6. A slow closing check valve according to claim 1, characterized in that: Both ends of the inner cavity of the rotating drum (4) are fixedly connected to guide rods (20), and the surface of the rotating disk (19) is movably connected to the surface of the guide rods (20).

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