Mute check valve

Abstract

The silent check valve is simple in structure and has a filtering function, the silent check valve comprises a valve body, a water inlet channel and a water outlet channel which are arranged on the valve body, and a filtering net which is arranged in an arch shape, a water passing seat which can allow water to pass through is arranged on the water outlet channel, and a valve rod is arranged on the water passing seat in a sliding and penetrating mode. A check plate used for sealing the water inlet channel is arranged on the valve rod, a buffer piece is arranged on the valve rod, fixing plates are arranged at the two ends of the filter screen, the fixing plates are arranged in the water inlet channel through fixing devices, a rotating wheel is rotationally arranged in the water inlet channel and located below the filter screen, and four vane plates are evenly distributed on the rotating wheel. A brush is arranged on the blade plate, and the brush abuts against the filter screen and is used for brushing the filter screen.

Description

Technical Field

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

[0002] Silent check valve is also called non-return valve, its function is to prevent the medium in the pipeline from flowing back. The opening and closing parts are opened or closed automatically by the flow and force of the medium to prevent the medium from flowing back.

[0003] Although the existing silent check valve can meet the demand, there are impurities in the water flow. Once they enter the check valve, they will adhere to the inner wall and the valve stem, corrode the check valve and the valve stem, and affect the life of the check valve.

[0004] In order to solve this problem, the utility model is produced. Utility Model Content

[0005] Therefore, in view of the above problems, the utility model proposes a silent check valve with a simple structure and a filtering function.

[0006] In order to solve the above technical problems, the solution adopted by the utility model is: a silent check valve, including a valve body, a water inlet channel and a water outlet channel opened on the valve body, and a filter screen arranged in an arch shape, the water outlet channel is provided with a water pass seat for water to flow through, a valve stem is slidably penetrated through the water pass seat, the valve stem is provided with a check plate for sealing the water inlet channel, the valve stem is provided with a buffer, fixed plates are provided at both ends of the filter screen, the fixed plates are arranged in the water inlet channel through a fixing device, a rotating wheel is rotatably provided in the water inlet channel and the rotating wheel is located below the filter screen, four blades are evenly distributed on the rotating wheel, a brush is provided on the blade, and the brush resists the filter screen and is used to brush the filter screen.

[0007] Further improvement is: it also includes a symmetrically arranged connecting block, the two ends of the rotating wheel are rotatably arranged on the connecting block, the inner wall of the water inlet channel is symmetrically opened with placement channels, the connecting block is arranged in the placement channel, and the valve body is provided with an anti-slip device to prevent the connecting block from slipping out of the placement channel.

[0008] A further improvement is that the anti-slip device includes an anti-slip rod, which is passed through the valve body and has one end located in the placement channel and the other end passing through the valve body. An anti-slip channel is opened on the connecting block, and the anti-slip rod is passed through the anti-slip channel. A pushing device is provided in the valve body to push the anti-slip rod against the anti-slip channel.

[0009] A further improvement is that the abutting device includes a abutting block, a abutting channel is opened in the valve body, the anti-slip rod is located in the abutting channel, the abutting block is arranged on the anti-slip rod and located in the abutting channel, and a abutting piece for abutting the abutting block is arranged in the abutting channel.

[0010] A further improvement is that the push-up member is a push-up spring, which is sleeved on the anti-drop rod, one end of the push-up spring resists the push-up block, and the other end of the push-up spring resists the inner wall of the push-up channel.

[0011] A further improvement is that a pull plate is provided on the anti-slip rod.

[0012] A further improvement is that the fixing device comprises two fixing blocks, the fixing blocks are symmetrically arranged on the inner wall of the water inlet channel, and the fixing plate is locked on the fixing blocks by bolts.

[0013] A further improvement is that: a sealing sleeve is arranged in the valve body, and the anti-dropping rod is passed through the sealing sleeve.

[0014] A further improvement is that the buffer component is a buffer spring, which is sleeved on the valve stem, one end of the buffer spring resists the water-passing seat, and the other end of the buffer spring resists the check plate.

[0015] By adopting the above technical solution, the beneficial effects of the utility model are:

[0016] The structure is simple and has filtering function. When in use, the impurities in the water flow can be filtered through the filter to prevent the impurities from entering the water outlet channel and attaching to the inner wall of the valve body, the valve stem and the check plate, which is helpful to prevent the check valve from being blocked and rusted, thereby increasing the service life of the check valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of a silent check valve according to an embodiment of the utility model.

[0018] Figure 2 It is a schematic diagram of the cutaway structure of the anti-slip device of the utility model embodiment. DETAILED DESCRIPTION

[0019] The utility model is now further described in conjunction with the accompanying drawings and specific embodiments.

[0020] refer to Figure 1-2, the utility model embodiment discloses: A silent check valve comprises a valve body 1, a water inlet channel 2 and a water outlet channel 3 opened on the valve body 1, and a filter screen 8 arranged in an arch shape. The water outlet channel 3 is provided with a water passing seat 5 through which water can flow. A valve stem 6 is slidably penetrated on the water passing seat 5. A check plate for sealing the water inlet channel 2 is provided on the valve stem 6. A buffer spring 7 is provided on the valve stem 6. The buffer spring 7 is sleeved on the valve stem 6. One end of the buffer spring 7 resists the water passing seat 5, and the other end of the buffer spring 7 resists the check plate. Fixed plates 9 are provided at both ends of the filter screen 8. Two fixed blocks 10 are symmetrically provided on the inner wall of the water inlet channel 2. The fixed plates 9 are locked on the fixed blocks 10 by bolts. A rotating wheel 11 is rotatably provided in the water inlet channel 2 and the rotating wheel 11 is located below the filter screen 8. Four blades 12 are evenly distributed on the rotating wheel 11. A brush is provided on the blade 12. The brush resists the filter screen 8 and is used to brush the filter screen 8. When in use, water flows into the water inlet channel 2, and then passes through the filter screen 8. The filter screen 8 filters the impurities in the water flow to prevent the impurities from entering the water outlet channel 3. Instead, the impurities are attached to the inner wall of the valve body 1, the valve stem 6 and the check plate, which is beneficial to prevent the check valve from being blocked, and at the same time can prevent rust and increase the service life of the check valve.

[0021] In order to facilitate the replacement of the brush, it also includes a symmetrically arranged connecting block 14 and an anti-dropping rod 15. The two ends of the rotating wheel 11 are rotatably arranged on the connecting block 14. The inner wall of the water inlet channel 2 is symmetrically provided with a placement channel. The connecting block 14 is arranged in the placement channel. The anti-dropping rod 15 is penetrated on the valve body 1 and one end is located in the placement channel, and the other end passes through the valve body 1. The anti-dropping channel is opened on the connecting block 14. The anti-dropping rod 15 is penetrated in the anti-dropping channel. The valve body 1 is provided with a device for placing the anti-dropping rod 15. The valve body 1 is provided with a push-up block 18 that pushes against the anti-slip channel. The anti-slip rod 15 is located in the push-up channel 16. The push-up block 18 is arranged on the anti-slip rod 15 and in the push-up channel 16. The push-up channel 16 is provided with a push-up spring 17 for pushing against the push-up block 18. The push-up spring 17 is sleeved on the anti-slip rod 15. One end of the push-up spring 17 resists the push-up block 18, and the other end of the push-up spring 17 resists the inner wall of the push-up channel 16. When in use, when the brush needs to be replaced, the anti-slip rod 15 is pulled, the anti-slip rod 15 is separated from the anti-slip channel, and then the connecting block 14 is separated from the placement channel, the rotating wheel 11 is taken out, and then a new brush is replaced. Put the connecting block 14 of the new brush into the placement channel, then release the anti-drop rod 15, the push spring 17 is reset, and the anti-drop rod 15 is driven to slide into the anti-drop channel to engage, so that the connecting block 14 can be fixed, thereby completing the replacement, which is simple and fast.

[0022] In order to facilitate pulling the anti-slip rod 15 , a pulling plate is provided on the anti-slip rod 15 .

[0023] In order to improve the sealing performance, a sealing sleeve is provided in the valve body 1, and the anti-drop rod 15 is passed through the sealing sleeve.

[0024] The basic principles, main features and advantages of the utility model are shown and described above. Those skilled in the art should understand that the utility model is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which shall fall within the scope of the utility model to be protected. The scope of protection of the utility model shall be defined by the attached claims and their equivalents.

Claims

1. A silent check valve, comprising a valve body, a water inlet channel and a water outlet channel opened on the valve body, the water outlet channel is provided with a water pass seat through which water can flow, the water pass seat is slidably penetrated with a valve stem, the valve stem is provided with a check plate for sealing the water inlet channel, the valve stem is provided with a buffer, and the characteristics are: It also includes an arched filter screen, with fixed plates at both ends of the filter screen, the fixed plates are arranged in the water inlet channel through a fixing device, a rotating wheel is rotatably arranged in the water inlet channel and the rotating wheel is located below the filter screen, four blades are evenly distributed on the rotating wheel, and a brush is arranged on the blade, and the brush resists the filter screen and is used to brush the filter screen.

2. The silent check valve according to claim 1, characterized in that: It also includes a symmetrically arranged connecting block, the two ends of the rotating wheel are rotatably arranged on the connecting block, the inner wall of the water inlet channel is symmetrically opened with a placement channel, the connecting block is arranged in the placement channel, and the valve body is provided with an anti-slip device to prevent the connecting block from sliding out of the placement channel.

3. The silent check valve according to claim 2, characterized in that: The anti-slip device includes an anti-slip rod, which is passed through the valve body and has one end located in the placement channel and the other end passing through the valve body. The connecting block is provided with an anti-slip channel, and the anti-slip rod is passed through the anti-slip channel. A pushing device is provided in the valve body to push the anti-slip rod against the anti-slip channel.

4. The silent check valve according to claim 3, characterized in that: The abutting device comprises an abutting block, a abutting channel is opened in the valve body, the anti-slip rod is located in the abutting channel, the abutting block is arranged on the anti-slip rod and located in the abutting channel, and an abutting piece for abutting the abutting block is arranged in the abutting channel.

5. The silent check valve according to claim 4, characterized in that: The resisting member is a resisting spring, which is sleeved on the anti-dropping rod, one end of the resisting spring resists the resisting block, and the other end of the resisting spring resists the inner wall of the resisting channel.

6. The silent check valve according to claim 3, characterized in that: A pull plate is provided on the anti-slip rod.

7. The silent check valve according to claim 1, characterized in that: The fixing device comprises two fixing blocks, the fixing blocks are symmetrically arranged on the inner wall of the water inlet channel, and the fixing plate is locked on the fixing blocks by bolts.

8. The silent check valve according to claim 3, characterized in that: A sealing sleeve is arranged in the valve body, and the anti-dropping rod is passed through the sealing sleeve.

9. The silent check valve according to claim 1, characterized in that: The buffer component is a buffer spring, which is sleeved on the valve stem, one end of the buffer spring resists the water-passing seat, and the other end of the buffer spring resists the check plate.

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