Flanged silent check valve

Abstract

The present application provides a flange type silencing check valve with simple structure and long service life, which comprises a valve body, a water inlet channel and a water outlet channel arranged on the valve body, a valve seat arranged on the valve body, a valve plate arranged on the valve body, and a fixing plate arranged in the water outlet channel and having a diameter larger than that of the valve plate, four slide rods arranged on the fixing plate in an array, the valve plate arranged on the end of the slide rods, a sliding device arranged between the valve body and the valve plate and used for driving the valve plate to slide up and down, and a pushing device arranged on the valve body and used for pushing the sliding device to open the valve plate and protecting the valve plate on the side of the water inlet channel.

Description

Technical Field

[0001] This invention relates to the field of valve technology, and in particular to a flange-type silent check valve. Background Technology

[0002] A silent check valve is a valve that automatically opens and closes its disc based on the flow of the medium itself to prevent backflow. It is also known as a non-return valve, one-way valve, silent check valve, backflow valve, and back pressure valve. Check valves are a type of automatic valve, primarily used to prevent backflow of the medium, prevent pump and drive motor reversal, and prevent the release of medium from containers. Check valves can also be used in pipelines supplying auxiliary systems where the pressure may rise above the system pressure. Check valves are mainly divided into swing check valves and lift check valves. Lift check valves are similar in structure to gate valves; the medium flows in from the inlet (bottom) and flows out from the outlet (top). When the inlet pressure is greater than the sum of the valve disc weight and its flow resistance, the valve is opened. Conversely, when the medium flows back, the valve is closed.

[0003] Although check valves can prevent backflow, during sealing, the valve disc impacts the valve seat, which can easily deform the disc and affect the seal. Furthermore, backflowing water can cause water hammer, which can damage the valve disc and reduce its lifespan. This invention addresses these problems. Summary of the Invention

[0004] Therefore, in view of the above problems, the present invention proposes a flange-type silent check valve with simple structure and improved valve disc service life.

[0005] To solve the above-mentioned technical problems, the solution adopted by the present invention is as follows: a flange-type silent check valve, comprising a valve body, an inlet channel and an outlet channel opened on the valve body, a valve seat opened on the valve body, a valve plate and a fixing plate disposed on the valve body, wherein the fixing plate is disposed in the outlet channel and the diameter of the fixing plate is larger than the diameter of the valve plate, four sliding rods are arranged in an array and slidably on the fixing plate, the valve plate is disposed on the end of the sliding rods, a sliding device for driving the valve plate to slide up and down is provided between the valve body and the valve plate, and a pushing device is provided on the valve body for pushing the sliding device to open the valve plate and for protecting the valve plate on the side of the inlet channel.

[0006] A further improvement is that the sliding device includes a sliding block, which is slidably mounted on a fixed plate. The valve plate is provided with two sliding seats, each with a sliding rod. The fixed plate is provided with an inclined sliding groove for the sliding rod to slide, and the number of sliding grooves is matched to the number of sliding rods. The sliding block is connected to the pushing device.

[0007] A further improvement is that the driving device includes a drive plate disposed in the water inlet channel, a drive rod disposed on the drive plate, a water-passing seat fixedly disposed in the water inlet channel, a first channel being opened on the water-passing seat, the drive rod being slidably disposed in the first channel, and a linkage device being disposed between the drive rod and the sliding block.

[0008] A further improvement is made to the linkage device, which includes a push rod. A second channel is provided on the valve body. The push rod slides through the valve body. One end of the push rod is connected to a sliding block, and the other end of the push rod is located in the second channel. A push plate is provided on the push rod and is located in the second channel. An eccentric wheel is rotatably provided in the second channel. The eccentric wheel abuts against the push plate to push the push rod to slide. A transmission device is provided between the eccentric wheel and the drive rod. The valve body is also provided with a return device to return the push rod to its original position.

[0009] A further improvement is that the transmission device includes a first transmission rod, which is rotatably disposed in the second channel. One end of the eccentric wheel is connected to the first transmission rod, and the other end of the first transmission rod is provided with a first conical tooth. A rotating device for driving the first transmission rod to rotate is provided between the first transmission rod and the drive rod.

[0010] A further improvement is that the rotating device includes a second transmission rod, which is rotatably mounted on the valve body. One end of the second transmission rod is located in the second channel and is provided with a second conical tooth. The first and second conical teeth mesh and drive each other. The other end of the second transmission rod is located in the water inlet channel and is provided with a drive gear. A toothed row is provided on the drive rod, and the gear meshes and drives the toothed row.

[0011] A further improvement is that the return device includes a first spring and a second spring. The first spring is sleeved on the push rod, one end of the first spring abuts against the push plate, and the other end of the first spring abuts against the inner wall of the second channel.

[0012] A further improvement is that the second spring is sleeved on the drive rod, one end of the second spring abuts against the drive plate, and the other end of the second spring abuts against the water seat.

[0013] A further improvement is that the drive board has a plurality of water passage holes.

[0014] A further improvement is that the fixing plate is bolted to the water outlet channel.

[0015] By adopting the aforementioned technical solution, the beneficial effects of the present invention are:

[0016] The structure is simple and protects the valve plate, extending its service life. When the check valve is opened, the water flow first impacts the drive plate, protecting the front end of the valve plate and extending its service life. When the check valve is closed, the backflowing water impacts the fixed plate, protecting the valve plate from water hammer and protecting the rear. Furthermore, the first and second springs and the transmission device drive the valve plate back to its original position, preventing it from slamming against the valve seat and deforming it due to the impact. This significantly extends the service life of the valve plate 4, and consequently, the service life of the check valve. Attached Figure Description

[0017] Figure 1 This is a cross-sectional structural diagram of a flange-type silent check valve according to an embodiment of the present invention.

[0018] Figure 2 This is an enlarged structural schematic diagram of section A in embodiment A of the present invention. Detailed Implementation

[0019] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0020] refer to Figure 1-2 The present invention discloses a flange-type silent check valve, comprising a valve body 1, an inlet channel 2 and an outlet channel 3 formed on the valve body 1, a valve seat formed on the valve body 1, a valve plate 4 formed on the valve body 1, and a fixing plate 5. The fixing plate 5 is disposed in the outlet channel 3 and the diameter of the fixing plate 5 is larger than the diameter of the valve plate 4. Four sliding rods are arranged in an array on the fixing plate 5. The valve plate 4 is disposed on the ends of the sliding rods. A sliding block 18 is provided between the valve body 1 and the valve plate 4 for driving the valve plate 4 to slide up and down. The sliding block 18 is slidably disposed on the fixing plate 5. The valve plate 4 is provided with two sliding seats 21. The sliding seats 21 are provided with sliding rods 20. The fixing plate 5 is inclinedly provided with sliding grooves 22 for the sliding rods 20 to slide, and the number of sliding grooves 22 matches the number of sliding rods 20. The valve body 1 is provided with a pushing device for pushing the sliding block 18 to slide so that the valve plate 4 opens and for protecting the valve plate 4 on the side of the inlet channel 2.

[0021] Specifically, the pushing device includes a drive plate 15 and a push rod 7 disposed within the water inlet channel 2. The drive plate 15 is equipped with a drive rod 16. A water-passing seat 14 is fixedly disposed within the water inlet channel 2. A first channel is formed on the water-passing seat 14, and the drive rod 16 is slidably disposed within the first channel. A second channel 10 is formed on the valve body 1, and the push rod 7 is slidably disposed through the valve body 1. One end of the push rod 7 is connected to a sliding block 18, and the other end of the push rod 7 is located within the second channel 10. A push plate 8 is disposed on the push rod 7 and located within the second channel 10. An eccentric wheel 9 is rotatably disposed within the second channel 10. The eccentric wheel 9 abuts against the push plate 8 to push the push rod 7 to slide. A first transmission rod 11 is disposed between the eccentric wheel 9 and the drive rod 16. The first transmission rod 11 is rotatably disposed within the second channel 10, and one end of the eccentric wheel 9 is connected to the first transmission rod 11. The other end of the valve body 1 is provided with a first conical tooth 12. A second transmission rod is provided between the first transmission rod 11 and the drive rod 16 to drive the first transmission rod 11 to rotate. The second transmission rod is rotatably mounted on the valve body 1. One end of the second transmission rod is located in the second channel 10 and is provided with a second conical tooth 13. The first conical tooth 12 and the second conical tooth 13 mesh and drive each other. The other end of the second transmission rod is located in the water inlet channel 2 and is provided with a drive gear 27. A toothed row 28 is provided on the drive rod 16. The gear meshes and drives the toothed row 28. The valve body 1 is also provided with a first spring and a second spring to return the push rod 7 to its original position. The first spring is sleeved on the push rod 7. One end of the first spring abuts against the push plate 8. The other end of the first spring abuts against the inner wall of the second channel 10. The second spring is sleeved on the drive rod 16. One end of the second spring abuts against the drive plate 15. The other end of the second spring abuts against the water seat 14.

[0022] In order to allow water to flow through the drive plate 15 better, the drive plate 15 is provided with a plurality of water passage holes.

[0023] To facilitate the disassembly and installation of the fixing plate 5, the fixing plate 5 is locked inside the water outlet channel 3 by bolts 6.

[0024] To improve the water hammer resistance of the fixed plate 5, a fixed seat 17 is provided on the fixed plate 5, and the sliding block 18 is slidably disposed on the fixed seat 17.

[0025] Working principle:

[0026] When in use, when the check valve is to be opened, water flows into the inlet channel 2, pushing the drive plate 15. The drive plate 15 drives the drive rod 16 to slide, and the gear rack 28 and the drive gear 27 mesh to drive the second transmission rod to rotate. The second transmission rod drives the second conical tooth 13 to rotate. The second conical tooth 13 meshes with the first conical tooth 12 to drive the first transmission rod 11 to rotate. The first rotating rod drives the eccentric wheel 9 to rotate. The rotation of the eccentric wheel 9 pushes the push plate 8, causing the push rod to slide. The sliding of the push plate 8 causes the sliding block 18 to slide. The sliding of the sliding block 18 causes the fixed plate 5 to slide, thereby causing the sliding rod 20 to slide upward in the sliding groove 22, thereby causing the valve plate 4 to open the valve seat and allow water to flow through. At this time, the first spring and the second spring are compressed, and under the protection of the drive plate 15, the water flow first hits the drive plate 15, protecting the front end of the valve plate 4 and improving the service life of the valve plate 4. When the check valve is to be closed, water flows back. Due to the reduced pressure in the inlet channel 2, the second spring elastically resets, causing the drive plate 15 to return to its original position. The return of the drive plate 15 causes the drive rod 16 to return to its original position, thereby causing the gear to reverse, which in turn causes the second transmission rod to reverse. The reverse of the second transmission rod causes the first transmission rod 11 to reverse, which in turn causes the eccentric wheel 9 to reverse. The reverse of the eccentric wheel 9 causes the first spring to elastically reset, causing the push rod 7 to reset. The push rod 7 causes the sliding block 18 to reset, causing the sliding rod 20 to slide downward in the sliding groove 22, thereby causing the valve plate 4 to close downward, thus sealing the check valve. Because the backflowing water impacts the fixed plate 5, the fixed plate 5 protects the valve plate 4 from water hammer, protecting the rear of the valve plate 4. Moreover, the return of the valve plate 4 by the first spring, the second spring, and the transmission device prevents the valve plate 4 from suddenly and heavily impacting the valve seat, thus preventing deformation of the valve plate 4 due to strong impacts. This greatly improves the service life of the valve plate 4, and thus improves the service life of the check valve.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions above are merely illustrative of the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope. All such changes and modifications fall within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. A flange type silencing check valve comprising a valve body, a water inlet channel and a water outlet channel formed on the valve body, a valve seat formed on the valve body, and a valve plate provided on the valve body, characterized in that: It also includes a fixing plate, which is located in the water outlet channel and has a diameter larger than that of the valve plate. Four sliding rods are arranged in an array on the fixing plate. The valve plate is located at the end of the sliding rods. A sliding device is provided between the valve body and the valve plate to drive the valve plate to slide up and down. The valve body is provided with a pushing device that can push the sliding device to open the valve plate and protect the valve plate on the side of the water inlet channel. The sliding device includes a sliding block, which is slidably mounted on a fixed plate. The valve plate is provided with two sliding seats, each with a sliding rod. The fixed plate is provided with an inclined sliding groove for the sliding rod to slide, and the number of sliding grooves is matched to the number of sliding rods. The sliding block is connected to a pushing device. The pushing device includes a drive plate disposed in the water inlet channel, a drive rod disposed on the drive plate, a water-passing seat fixedly disposed in the water inlet channel, a first channel being opened on the water-passing seat, the drive rod being slidably disposed in the first channel, and a linkage device being provided between the drive rod and the sliding block; The linkage device includes a push rod, a second channel is provided on the valve body, the push rod slides through the valve body, one end of the push rod is connected to a sliding block, and the other end of the push rod is located in the second channel. A push plate is provided on the push rod and is located in the second channel. An eccentric wheel is rotatably provided in the second channel. The eccentric wheel resists the push plate to push the push rod to slide. A transmission device is provided between the eccentric wheel and the drive rod. The valve body is also provided with a return device to return the push rod to its original position.

2. A flanged silent check valve according to claim 1, characterized in that: The transmission device includes a first transmission rod, which is rotatably disposed in the second channel. One end of the eccentric wheel is connected to the first transmission rod, and the other end of the first transmission rod is provided with a first conical tooth. A rotating device for driving the first transmission rod to rotate is provided between the first transmission rod and the drive rod.

3. A flanged silent check valve according to claim 2, wherein: The rotating device includes a second transmission rod that rotatably passes through the valve body. One end of the second transmission rod is located in the second channel and is provided with a second conical tooth. The first and second conical teeth mesh and drive each other. The other end of the second transmission rod is located in the water inlet channel and is provided with a drive gear. A toothed row is provided on the drive rod, and the gear meshes and drives the toothed row.

4. The flanged silent check valve according to claim 1, wherein: The return device includes a first spring and a second spring. The first spring is sleeved on the push rod. One end of the first spring abuts against the push plate, and the other end of the first spring abuts against the inner wall of the second channel.

5. A flange-type silent check valve according to claim 4, characterized in that: The second spring is sleeved on the drive rod, with one end of the second spring resisting the drive plate and the other end of the second spring resisting the water passage seat.

6. A flanged silent check valve according to claim 1, characterized in that: The drive board has a plurality of water passage holes.

7. A flange-type silent check valve according to claim 1, characterized in that: The fixing plate is bolted to the water outlet channel.

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