Eccentric pure metal hard seal butterfly valve

Abstract

This invention proposes an eccentric pure metal hard-seal butterfly valve with a simple structure that can prevent water hammer, thereby protecting the valve plate and improving the service life of the valve. It includes a valve body, an inlet channel and an outlet channel on the valve body, a valve plate and a baffle located between the inlet and outlet channels. The baffle has sliding rods at both ends. Sliding grooves are formed at both ends of the inner wall of the inlet channel to match the positions of the sliding rods. The sliding rods slide within the sliding grooves. The valve body has a first channel communicating with the sliding grooves. A rotating rod is rotatably mounted within the first channel. One end of the rotating rod has a first anti-hammer device for reducing water hammer impact on the baffle and improving its service life. The other end of the rotating rod has a second anti-hammer device that not only reduces water hammer impact on the baffle but also eliminates water hammer impact on the gap between the inlet channel and the baffle. The baffle and the rotating rod are linked by a first linkage device.

Description

Technical Field

[0001] This invention relates to the field of valve technology, and in particular to an eccentric pure metal hard-seal butterfly valve. Background Technology

[0002] With societal development, pipeline connections are essential in both production and daily life. Pipeline connections require the use of fittings, among which the eccentric hard-seal butterfly valve is a frequently used component.

[0003] Existing eccentric hard-seal butterfly valves experience water hammer when closed, causing water hammer to strike and damage the valve plate, thus affecting the valve's service life. This invention addresses this problem. Summary of the Invention

[0004] Therefore, in view of the above problems, the present invention proposes an eccentric pure metal hard-seal butterfly valve with a simple structure that can prevent water hammer, thereby protecting the valve plate and improving the service life of the valve.

[0005] To solve the above-mentioned technical problems, the solution adopted by the present invention is as follows: an eccentric pure metal hard-seal butterfly valve, including a valve body, an inlet channel and an outlet channel opened on the valve body, a valve plate and a baffle plate disposed between the inlet channel and the outlet channel, the baffle plate having sliding rods at both ends, the inner wall of the inlet channel having sliding grooves at both ends matching the sliding rod positions, the sliding rods being slidably disposed in the sliding grooves, the valve body having a first channel communicating with the sliding grooves, a rotating rod being rotatably disposed in the first channel, one end of the rotating rod having a first anti-hammer device for reducing water hammer impact on the baffle plate to improve the service life of the baffle plate, the other end of the rotating rod having a second anti-hammer device that not only reduces water hammer impact on the baffle plate but also eliminates water hammer impact on the gap between the inlet channel and the baffle plate, the baffle plate and the rotating rod being linked by a first linkage device, thereby causing the rotating rod to rotate when the baffle plate slides.

[0006] A further improvement is that the first hammer-eliminating device includes a fixed sleeve, which is disposed on the inner wall of the first channel and located at one end of the rotating rod. The rotating rod passes through the fixed sleeve, and there is a gap between the rotating rod and the fixed sleeve. A blocking device is provided between the fixed sleeve and the rotating rod to prevent the rotating rod from rotating.

[0007] A further improvement is that the blocking device includes several protrusions on the outer end face of the rotating rod, the fixed sleeve has a swing channel, the fixed sleeve has several swing grooves connected to the swing channel, several swing rods are provided in the swing grooves, one end of the swing rod is located in the swing channel, the other end of the swing rod is located in the gap, the protrusions collide with the swing rods, and the swing rods are provided with damping devices to prevent the swing rods from swinging.

[0008] A further improvement is that the damping device includes an elastic membrane, which is disposed in a swing groove, and the swing rod passes through and is connected to the elastic membrane. A damping element is provided in the swing groove.

[0009] A further improvement is that the second hammer suppression device includes a water spray plate capable of spraying a water curtain. The water spray plate is located inside the inner wall at the upper end of the water inlet channel. A water spray pipe is connected to the water spray plate. A second channel is opened in the valve body. A water spray bladder is located in the second channel of the valve body. The water spray bladder is connected to the water spray pipe. A squeezing device is provided between the rotating rod and the water spray bladder to squeeze the water spray bladder so that the water spray plate sprays water to form a water curtain.

[0010] A further improvement is made to the extrusion device, which includes symmetrically arranged extrusion rods, each of which is provided with an extrusion tooth row. The extrusion tooth row is slidably disposed in a second channel. Within the second channel, there are rotatable sector gears that can drive the extrusion tooth rows to slide and move closer or separate from each other. The sector gears mesh with the extrusion tooth rows for transmission. A drive rod is also slidably disposed within the second channel. One end of the drive rod is provided with a rotating device for driving the sector gears to rotate. The other end of the drive rod is connected to the rotating rod through a second linkage device.

[0011] A further improvement is that the rotating device includes a first connecting rod that matches the sector gears. One end of the first connecting rod is connected to the sector gears, and the other end of the first connecting rod is hinged to a second connecting rod. The other end of the second connecting rod is hinged to a push plate, and the push plate is connected to a drive rod so that the push plate drives the two sector gears to rotate.

[0012] A further improvement is that the second linkage device includes a rotating gear, the rotating rod has a third channel at the other end of the fixed sleeve, the rotating gear is rotatably located at the end of the rotating rod and in the third channel, the driving rod has a rotating gear rack, the rotating gear meshes with the rotating gear rack for transmission, a water spray return spring is connected to the rotating gear rack, and the other end of the water spray return spring is connected to the inner wall of the third channel.

[0013] A further improvement is that the valve body is equipped with a water filling pipe, one end of which is connected to the water inlet channel and the other end of which is connected to the water spray bag. The water filling pipe is equipped with a one-way valve to ensure that water can only enter the water filling pipe from the water inlet channel.

[0014] A further improvement is that the first linkage device includes a sliding toothed rack, the sliding rod is provided with a sliding toothed rack in the sliding groove, the rotating rod is fitted with a sliding gear, the sliding toothed rack meshes with the sliding gear for transmission, and the sliding groove is provided with a return member to return the baffle to its original position.

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

[0016] With a simple structure, it can prevent water hammer, thereby protecting the valve plate and extending the valve's service life. When water hammer occurs, it strikes the baffle plate, pushing it to slide. A return spring 5 then provides initial water hammer suppression. As the baffle slides, it drives a rotating rod, where a first and second water hammer suppression device further reduces the impact of the water hammer on the baffle plate, allowing for longer use and continuous protection of the valve plate. This prevents direct water hammer impact and damage, thus extending the valve's lifespan. Furthermore, the spray plate generates a water curtain, blocking water hammer from the gap between the baffle and the valve body, dissipating its energy and further reducing its impact on the valve plate, thus extending its service life. Attached Figure Description

[0017] Figure 1 This is a cross-sectional structural diagram of an eccentric pure metal hard-seal butterfly valve according to an embodiment of the present invention.

[0018] Figure 2 This is a cross-sectional structural diagram of the first hammer-eliminating device according to an embodiment of the present invention.

[0019] Figure 3 This is a schematic diagram of the second linkage device in an embodiment of the present invention.

[0020] Figure 4 This is a schematic diagram of the extrusion device structure according to an embodiment of the present invention. Detailed Implementation

[0021] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0022] refer to Figure 1-4The present invention discloses an eccentric pure metal hard-seal butterfly valve, comprising a valve body 1 made of metal, an inlet channel 2 and an outlet channel 3 formed on the valve body 1, a valve plate, a baffle 3, and a sliding toothed row 4 disposed between the inlet channel 2 and the outlet channel 3. The baffle 3 has sliding rods at both ends. The inner wall of the inlet channel 2 has sliding grooves at both ends matching the positions of the sliding rods. The sliding rods are slidably disposed within the sliding grooves. The valve body 1 has a first channel communicating with the sliding grooves. A rotating rod 6 is rotatably disposed within the first channel. One end of the rotating rod 6 is provided with… A first hammer-eliminating device is used to reduce water hammer impacts on the baffle 3 to improve the service life of the baffle 3. The other end of the rotating rod 6 is provided with a second hammer-eliminating device that can not only reduce water hammer impacts on the baffle 3, but also eliminate hammer impacts on the gap between the water inlet channel 2 and the baffle 3. The sliding rod is provided with a sliding toothed rack 4 in the sliding groove. A sliding gear 7 is sleeved on the rotating rod 6. The sliding toothed rack 4 and the sliding gear 7 mesh and drive each other. A return spring 5 is provided in the sliding groove to return the baffle 3 to its original position and to dissipate water hammer energy, thereby protecting the baffle 3.

[0023] Specifically, the first hammer-eliminating device includes a fixed sleeve 9 and four protrusions 10. The fixed sleeve 9 is located on the inner wall of the first channel and at one end of the rotating rod 6. The rotating rod 6 passes through the fixed sleeve 9, and there is a gap between the rotating rod 6 and the fixed sleeve 9. The protrusions 10 are located on the outer end face of the rotating rod 6. The fixed sleeve 9 has a swing channel 11 and ten swing grooves communicating with the swing channel 11. Swing rods 12 are installed in the swing grooves. One end of the swing rod 12 is located inside the swing channel 11, and the other end of the swing rod 12 is located inside the gap. The protrusion 10 abuts against the swing rod 12. The swing rod 12 is provided with an elastic membrane 14 to hinder the swing of the swing rod 12. The elastic membrane 14 is provided inside the swing groove. The swing rod 12 passes through the elastic membrane 14 and is connected to the elastic membrane 14. A damping spring 13 is provided inside the swing groove. One end of the damping spring 13 is connected to the swing rod 12, and the other end of the damping spring 13 is connected to the inner wall of the swing groove.

[0024] Specifically, the second hammer suppression device includes a water spray plate 8 capable of spraying a water curtain, symmetrically arranged extrusion rods 20, and a rotating gear 15. The water spray plate 8 is located on the inner wall of the upper end of the water inlet channel 2, and a water spray pipe 19 is connected to the water spray plate 8. A second channel is opened inside the valve body 1, and a water spray bladder 18 is located in the second channel of the valve body 1. The water spray bladder 18 is connected to the water spray pipe 19. Extrusion rods 20 are respectively provided with extrusion tooth rows 21, which are slidably arranged in the second channel. The second channel is rotatably equipped with extrusion tooth rows 21 that can drive the extrusion tooth rows 21 to slide and move closer together or apart. A sector gear 22 is provided, which meshes with the extrusion gear row 21 for transmission. A drive rod 16 also slides through the second channel. The second channel is provided with two first connecting rods 23 for driving the extrusion gear row 21 to rotate. The first connecting rods 23 are matched with the sector gear 22. One end of the first connecting rod 23 is connected to the sector gear 22, and the other end of the first connecting rod 23 is hinged to a second connecting rod 24. The other end of the second connecting rod 24 is hinged to a push plate 25. The push plate 25 is connected to the drive rod 16, so that the push plate 25 drives the two sector gears 22 to rotate.

[0025] The rotating rod 6 has a third channel at the other end of the fixed sleeve 9. The rotating gear 15 is rotatably located at the end of the rotating rod 6 and in the third channel. The driving rod 16 has a rotating gear row. The rotating gear 15 meshes with the rotating gear row for transmission. A water spray return spring 17 is connected to the rotating gear row. The other end of the water spray return spring 17 is connected to the inner wall of the third channel.

[0026] In order to facilitate the next use of the water spray bag 18, the valve body 1 is provided with a water filling pipe. One end of the water filling pipe is connected to the water inlet channel 2, and the other end of the water filling pipe is connected to the water spray bag 18. The water filling pipe is provided with a one-way valve so that water can only enter the water filling pipe from the water inlet channel 2.

[0027] Working principle:

[0028] When the butterfly valve is closed, water hammer enters through the inlet channel 2 and impacts the baffle 3. The baffle 3 slides within the sliding groove, compressing the return spring 5, thus dissipating the water hammer in the first stage. As the baffle 3 slides, it drives the sliding gear 4 to slide. The sliding gear 4 meshes with the sliding gear 7, causing the sliding gear 7 to rotate. The sliding gear 7 then drives the rotating rod 6 to rotate. When the rotating rod 6 rotates, the protrusion 10 at its end strikes the swing rod 12, causing the swing rod 12 to swing, thereby stretching the elastic diaphragm 14 and compressing the damping spring 13, thus dissipating the water hammer again. Then, the other end of the rotating rod 6 drives the rotating gear 15 to rotate, and the rotating gear 15 meshes with the rotating gear... The transmission drives the drive rod 16 to slide and stretch the water spray return spring 17. The drive rod 16 pulls the push plate 25 to slide, and the push rod drives the second connecting rod 24 to swing. The second connecting rod 24 drives the first connecting rod 23 to swing. The first connecting rod 23 drives the sector gear 22 to rotate inward, thereby driving the extrusion gear row 21 to slide closer together. This causes the extrusion rod 20 to extrude water spray bladder 18. Then, the water spray bladder 18 sprays water from the water spray pipe 19 and into the water spray plate 8. The water spray plate 8 forms a water curtain, which blocks and dissipates the water hammer flowing from the gap of the baffle 3. This allows the water hammer effect in the butterfly valve inlet channel 2 to be fully eliminated, thereby protecting the valve plate and improving the performance of the butterfly valve.

[0029] 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. An eccentric pure metal hard-seal butterfly valve, comprising a valve body, an inlet channel and an outlet channel formed on the valve body, and a valve plate disposed between the inlet channel and the outlet channel, characterized in that: It also includes a baffle, with sliding rods at both ends. Sliding grooves are formed at both ends of the inner wall of the water inlet channel to match the positions of the sliding rods. The sliding rods are slidably disposed within the sliding grooves. The valve body has a first channel communicating with the sliding grooves. A rotating rod is rotatably disposed within the first channel. One end of the rotating rod has a first anti-hammer device for reducing water hammer impact on the baffle to improve its service life. The other end of the rotating rod has a second anti-hammer device that not only reduces water hammer impact on the baffle but also eliminates water hammer between the water inlet channel and the baffle. The baffle and the rotating rod are linked by a first linkage device, thereby enabling… When the baffle slides, it drives the rotating rod to rotate. The first hammer-eliminating device includes a fixed sleeve, which is disposed on the inner wall of the first channel and located at one end of the rotating rod. The rotating rod passes through the fixed sleeve, and there is a gap between the rotating rod and the fixed sleeve. A blocking device is provided between the fixed sleeve and the rotating rod to prevent the rotating rod from rotating. The blocking device includes several protrusions, which are disposed on the outer end face of the rotating rod. The fixed sleeve is provided with a swing channel and several swing grooves connected to the swing channel. Several swing rods are disposed in the swing grooves, and one end of each swing rod is located in the swing channel. Inside, the other end of the swing rod is located within the gap, the protrusion abuts against the swing rod, and the swing rod is provided with a damping device to hinder the swing of the swing rod; the damping device includes an elastic membrane, the elastic membrane is disposed in the swing groove, the swing rod passes through the elastic membrane and is connected to the elastic membrane, and a damping element is provided in the swing groove; the second hammer-eliminating device includes a water spray plate capable of spraying a water curtain, the water spray plate is disposed in the inner wall of the upper end of the water inlet channel, the water spray plate is connected to a water spray pipe, a second channel is opened in the valve body, the valve body is provided with a water spray bladder located in the second channel, the water spray bladder is connected to the water spray pipe, and the... A squeezing device is provided between the rotating rod and the water spray bladder to squeeze the water spray bladder and cause the water spray plate to spray water to form a water curtain; the squeezing device includes symmetrically arranged squeezing rods, each of which is provided with a squeezing tooth row. The squeezing tooth row is slidably disposed in a second channel. Within the second channel, sector gears are rotatably disposed, capable of driving the squeezing tooth row to slide and move closer or separate from each other. The sector gears mesh with the squeezing tooth row for transmission. A drive rod is also slidably disposed within the second channel. One end of the drive rod is provided with a rotating device for driving the sector gear to rotate. The other end of the drive rod is connected to the rotating rod through a second linkage device.

2. The eccentric pure metal hard-seal butterfly valve according to claim 1, characterized in that: The rotating device includes a first connecting rod that matches the sector gears. One end of the first connecting rod is connected to the sector gears, and the other end of the first connecting rod is hinged to a second connecting rod. The other end of the second connecting rod is hinged to a push plate. The push plate is connected to a drive rod so that the push plate drives the two sector gears to rotate.

3. The eccentric pure metal hard-seal butterfly valve according to claim 1, characterized in that: The second linkage device includes a rotating gear, and the rotating rod is located at the other end of the fixed sleeve with a third channel. The rotating gear is rotatably disposed at the end of the rotating rod and located in the third channel. The driving rod is provided with a rotating gear row. The rotating gear meshes with the rotating gear row for transmission. A water spray return spring is connected to the rotating gear row. The other end of the water spray return spring is connected to the inner wall of the third channel.

4. The eccentric pure metal hard-seal butterfly valve according to claim 1, characterized in that: The valve body is equipped with a water filling pipe. One end of the water filling pipe is connected to the water inlet channel, and the other end of the water filling pipe is connected to the water spray bag. The water filling pipe is equipped with a one-way valve to ensure that water can only enter the water filling pipe from the water inlet channel.

5. The eccentric pure metal hard-seal butterfly valve according to claim 1, characterized in that: The first linkage device includes a sliding toothed rack, the sliding rod is provided with a sliding toothed rack in the sliding groove, the rotating rod is fitted with a sliding gear, the sliding toothed rack meshes with the sliding gear for transmission, and a return member is provided in the sliding groove to return the baffle to its original position.

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