An erosion resistant stop valve

Abstract

The present application relates to the technical field of valve, disclose a kind of scouring resistance stop valve, including first joint, valve body mechanism, valve handle, middle body and second joint, connecting body in the application supports rubber strip to the elastic extrusion of force bar, so that force bar is pressed in sliding groove surface and slides, reduce the contact surface of force bar to sliding groove, so that force bar is rotated in the concave position of sliding groove, and there is the elastic force of rubber strip and first spring and is pressed, sealed while reducing the friction rotation between the surface of pressure plate and bottom plate, reduce the friction of rotation, and when flange gasket is rotated by rotating lever, the lower surface of ceramic sheet is frictionally active between the surface of flange gasket, and contract ring is contracted while being pressed in the inner side of middle body, so that water is blocked in the gap between annular structure and middle body and valve cover, avoid water to penetrate and overflow upwards to cause rusting and affect the rotation of rotating lever.

Description

Technical Field

[0001] This invention relates to the field of valve technology, specifically an anti-erosion shut-off valve. Background Technology

[0002] The anti-erosion exhaust gas emergency shut-off valve can perform a certain emergency shut-off of gas and liquid. It is mainly used in industrial scenarios. When a flammable gas leak, abnormal gas or water flow pressure, or excessive temperature is detected, it can eliminate safety hazards by quickly cutting off the flow of the medium. In addition, through the manual reset function, it can be forcibly closed by mechanical structure even if there is a power outage or network interruption, ensuring the reliability of safety isolation.

[0003] However, when rotating and opening, if only the rotation is used, under prolonged immersion and rinsing in water, water can easily penetrate into the gaps at the rotating position and seep outwards. The rotation of the rotating rod is easily corroded by the seeping water, which can easily increase the rotational resistance of the rotating rod. Furthermore, since the opening and closing uses two panels that are staggered, the surface contact friction between the panels is relatively large, and water seeps into the gaps between the panels, causing rust and increasing the frictional resistance. This will increase the frictional resistance between the panels and affect the rotational opening and closing between the panels. Summary of the Invention

[0004] The present invention provides an anti-erosion shut-off valve that overcomes the shortcomings described in the prior art.

[0005] The technical solution adopted by this invention to solve its technical problem is:

[0006] An anti-erosion shut-off valve includes a first connector, a valve body mechanism, a valve handle, a middle body, and a second connector. The middle body is sealed by being fixed to the upper end of the valve body mechanism. The valve handle passes through the middle body and rotates to open and close within the valve body mechanism. The left and right ends of the valve body mechanism are connected to water pipes through the second connector and the first connector.

[0007] The valve body mechanism comprises a main body, a rotating rod, a cutting mechanism, a connecting body, a sealing structure, a valve stem, and a valve cover. The cutting mechanism is engaged in the middle of the main body. The upper end of the rotating rod rotates via a valve handle. The valve cover is sealed and fixed to the upper end of the main body, while the middle body is sealed and fixed to the upper end of the valve cover, so that the sealing structure seals between the valve cover and the middle body. The connecting body presses vertically against the cutting mechanism via the valve stem. The rotating rod at the upper end of the valve stem rotates within the middle body, causing the connecting body to rotate offset relative to the cutting mechanism.

[0008] Furthermore, the cutting mechanism includes a pressure plate, a rotating ring structure, a semi-circular strip, a metal strip, a first flow hole, a second flow hole, a base plate, and a sliding groove. The base plate is horizontally engaged in the middle position of the main body. The pressure plate slides and rotates through the rotating ring structure corresponding to the sliding groove on the surface of the base plate. The pressure plate has two first flow holes and two second flow holes in the base plate, which are symmetrically distributed around the same central axis and are arranged vertically. Two metal strips are symmetrically distributed on the surface of the pressure plate through the two first flow holes, and the metal strips are sealed and engaged with the semi-circular strip on the surface of the base plate. The outer end of the pressure plate has four slots. The slots of the connecting body drive the pressure plate to rotate and cause the first and second flow holes to open and close in an alternating state.

[0009] Furthermore, the lower end of the semicircular strip is provided with a fixing block, and the fixing block is used to fix it to the surface of the base plate along the edge of the second flow hole. There are two metal strips. When the second flow hole and the first flow hole coincide, the two metal strips on the surface of the pressure plate squeeze and seal the two sides of the semicircular strip.

[0010] Furthermore, the rotating ring structure is provided with a force-bearing strip, a rubber strip, and a first spring. There are two rubber strips, and the lower ends of the two rubber strips are provided with a force-bearing strip that abuts against the sliding groove. The first spring is arranged in a ring between the force-bearing strips, and the elasticity of the first spring keeps the two force-bearing strips at a stable distance.

[0011] Furthermore, the sealing structure includes a second spring, an annular structure, a triangular block, and a flange gasket. The flange gasket surrounds the outside of the rotating rod. The second spring is inclined at the lower end of the middle body. The triangular block at the lower end of the second spring slides on the annular structure, and the right-angled side of the annular structure abuts against the surface of the flange gasket and the inner side of the middle body under the elasticity of the second spring.

[0012] Furthermore, the annular structure includes a deformation ring, a track bar, a ceramic sheet, and a shrinking ring. The track bar is arranged on the inclined surface of the deformation ring, and the outer side of the deformation ring is surrounded by inclined shrinking rings. The lower end of the triangular block is provided with two sliding rods. The sliding rods slide at an inclined position on the track bar, causing the ceramic sheet at the lower end of the deformation ring to press against the surface of the flange gasket. The deformation ring deforms and squeezes outward, causing the shrinking ring to shrink and press against the inner side of the middle body.

[0013] Compared with existing technologies, this technical solution has the following advantages:

[0014] In this invention, since the connecting body can only rotate via the valve stem, the connecting body supports the rubber strip, which elastically compresses the force strip, causing the force strip to slide against the surface of the groove. Because the lower end of the force strip is arc-shaped, the contact area between the force strip and the groove is reduced. At the same time, under the elasticity of the first spring, the distance between the two force strips is relatively stable, making the force strips form two stable annular states. Thus, when the force strip rotates in the concave position of the groove, it is pressed by the elastic force of the rubber strip and the first spring, which seals the groove while reducing the frictional rotation between the pressure plate and the bottom plate surface, thereby reducing the frictional force of rotation.

[0015] In this invention, when the rotating rod drives the flange gasket to rotate, the lower surface of the ceramic plate rubs against the surface of the flange gasket. When the triangular block moves downward, it slides in the track through the slide rod, causing the deformation ring to elastically deform outward. This causes the contraction rings to contract and press against the inside of the middle body, providing space for the rotation of the rotating rod while preventing water from entering the middle body through the gap of the valve cover. Water is blocked below the annular structure and between the middle body and the valve cover, preventing water from seeping upward and overflowing, causing rust and affecting the rotation of the rotating rod. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is an overall diagram of the present invention.

[0018] Figure 2 This is a planar schematic diagram of the valve body mechanism.

[0019] Figure 3 This is a plan view of the cutting mechanism.

[0020] Figure 4 This is a side view of the rotating ring structure.

[0021] Figure 5 This is a side view of the semicircular bar and the metal bar.

[0022] Figure 6 This is a partially enlarged schematic diagram of the sealing structure.

[0023] Figure 7 This is a partial three-dimensional schematic diagram of the ring structure.

[0024] In the diagram: First connector-1, valve body mechanism-2, valve handle-3, middle body-4, second connector-5, main body-21, rotating rod-22, cutting mechanism-23, connecting body-24, sealing structure-25, valve stem-26, valve cover-27, pressure plate-231, rotating ring structure-232, semi-circular strip-233, metal strip-234, first flow hole-235, second flow hole-236, base plate-237, sliding groove-238, fixing block-101, force-bearing strip-2321, rubber strip-2322, first spring-2323, second spring-41, ring structure-42, triangular block-43, flange gasket-44, deformation ring-421, track strip-422, ceramic plate-423, shrink ring-424. Detailed Implementation

[0025] like Figures 1 to 7 As shown, the present invention proposes an anti-erosion shut-off valve, including a first connector 1, a valve body mechanism 2, a valve handle 3, a middle body 4, and a second connector 5. The middle body 4 is sealed by being fixed to the upper end of the valve body mechanism 2. The valve handle 3 passes through the middle body 4 and rotates to open and close within the valve body mechanism 2. The left and right ends of the valve body mechanism 2 are connected to water pipes through the second connector 5 and the first connector 1.

[0026] The valve body mechanism 2 includes a main body 21, a rotating rod 22, a cutting mechanism 23, a connecting body 24, a sealing structure 25, a valve stem 26, and a valve cover 27. The cutting mechanism 23 is engaged in the middle of the main body 21. The upper end of the rotating rod 22 is rotatable via the valve handle 3. The valve cover 27 is sealed and fixed to the upper end of the main body 21, while the middle body 4 is sealed and fixed to the upper end of the valve cover 27, so that the sealing structure 25 seals between the valve cover 27 and the middle body 4. The connecting body 24 is perpendicular to the cutting mechanism 23 via the valve stem 26. The rotating rod 22 at the upper end of the valve stem 26 rotates within the middle body 4, causing the connecting body 24 to rotate offset relative to the cutting mechanism 23.

[0027] Furthermore, the middle of the main body 21 is the connection point between the second connector 5 and the first connector 1. A rubber gasket is also provided in the middle of the main body 21, and the cutting mechanism 23 is engaged in the middle of the main body 21 to press against the rubber gasket, sealing the middle of the main body 21 and the cutting mechanism 23. The maximum rotation angle of the valve handle 3 is 90°. When water enters the left side of the main body 21 from the second connector 5, the valve handle 3 is rotated to make the rotating rod 22 drive the valve stem 26 to rotate. As a result, the connecting body 24 at the lower end of the valve stem 26 drives the internal part of the cutting mechanism 23 to open and close in a staggered manner, so as to achieve the effect of water flow.

[0028] The cutting mechanism 23 includes a pressure plate 231, a rotating ring structure 232, a semi-circular strip 233, a metal strip 234, a first flow hole 235, a second flow hole 236, a base plate 237, and a sliding groove 238. The base plate 237 is horizontally engaged in the middle position of the main body 21. The pressure plate 231 slides and rotates through the rotating ring structure 232 corresponding to the sliding groove 238 on the surface of the base plate 237. The pressure plate 231 has two first flow holes 235 and two second flow holes 236 in the base plate 237, which are symmetrically distributed around the same central axis and are arranged vertically. Two metal strips 234 are symmetrically distributed on the surface of the pressure plate 231 through the two first flow holes 235, and the metal strips 234 are sealed and engaged with the semi-circular strip 233 on the surface of the base plate 237. The outer end of the pressure plate 231 has four slots. The slots of the connecting body 24 drive the pressure plate 231 to rotate, and cause the first flow holes 235 and the second flow holes 236 to open and close in an alternating state.

[0029] Furthermore, the first flow hole 235 and the second flow hole 236 are the same size and shape. The base plate 237 is fixedly engaged in the middle of the main body 21, and the lower edge of the base plate 237 presses against the rubber gasket to seal the edge. This causes the cutting mechanism 23 to rotate in the four slots on the outer side of the pressure plate 231, so that the rotating ring structure 232 on the pressure plate 231 slides in the groove 238 on the surface of the base plate 237. At this time, the metal strip 234 on the surface of the pressure plate 231 disengages from the semi-circular strip 233 on the edge of the second flow hole 236, and then the water flows from below through the second flow hole 236 to the surface of the pressure plate 231 and flows out from the first flow hole 235. When the metal strip 234 is engaged in the position of the semi-circular strip 233, the second flow hole 236 and the first flow hole 235 are cross-shaped. When the states are misaligned, the water flowing upward from the second flow hole 236 is blocked by the sealing engagement between the metal strip 234 and the semi-circular strip 233. This sealing engagement between the metal strip 234 and the semi-circular strip 233 reduces the possibility of water seeping between the pressure plate 231 and the bottom plate 237 when the first flow hole 235 and the second flow hole 236 are misaligned. It also prevents water from seeping through the second flow hole 236 through the position of the semi-circular strip 233 and the metal strip 234, thus avoiding rusting of the pressure plate 231 and the bottom plate 237 caused by water seepage. At the same time, it provides a certain amount of space for the rotation between the rotating ring structure 232 and the sliding groove 238, creating a larger gap between the pressure plate 231 and the bottom plate 237, which facilitates the rotation and sliding of the rotating ring structure 232 and the sliding groove 238 and reduces the friction surface.

[0030] The lower end of the semicircular strip 233 is provided with a fixing block 101, and is fixed to the surface of the base plate 237 along the edge of the second flow hole 236 by the fixing block 101. There are two metal strips 234. When the second flow hole 236 and the first flow hole 235 overlap, the two metal strips 234 on the surface of the pressure plate 231 squeeze and seal the two sides of the semicircular strip 233.

[0031] Furthermore, the semicircular strip 233 is made of silicone rubber and is hollow inside, which has the characteristics of less friction than ordinary rubber but more stable elasticity. Therefore, when the metal strip 234 is engaged on the surface of the semicircular strip 233, the metal strip 234 can slide and squeeze on the surface of the semicircular strip 233, and the metal strip 234 squeezes the left and right sides of the semicircular strip 233 respectively, forming an elastic closure on both sides under the elasticity of the semicircular strip 233.

[0032] The rotating ring structure 232 is provided with a force-bearing strip 2321, a rubber strip 2322 and a first spring 2323. There are two rubber strips 2322, and the lower ends of the two rubber strips 2322 are provided with a force-bearing strip 2321 that abuts against the sliding groove 238. The first spring 2323 is arranged in a ring between the force-bearing strips 2321, and the elasticity of the first spring 2323 keeps the two force-bearing strips 2321 at a stable distance.

[0033] In this invention, since the connecting body 24 can only rotate via the valve stem 26, the connecting body 24 supports the rubber strip 2322 to elastically compress the force strip 2321, causing the force strip 2321 to slide against the surface of the groove 238. Because the lower end of the force strip 2321 is arc-shaped, the contact area between the force strip 2321 and the groove 238 is reduced. At the same time, under the elasticity of the first spring 2323, the distance between the two force strips 2321 is relatively stable, so that the force strips 2321 form two stable ring states. Thus, when the force strip 2321 rotates in the concave position of the groove 238, it is pressed by the elastic force of the rubber strip 2322 and the first spring 2323, which seals the surface and reduces the frictional rotation between the pressure plate 231 and the bottom plate 237, thereby reducing the frictional force of rotation.

[0034] The sealing structure 25 includes a second spring 41, an annular structure 42, a triangular block 43, and a flange gasket 44. The flange gasket 44 surrounds the outside of the rotating rod 22. The second spring 41 is inclined and ringed at the lower end of the middle body 4. The triangular block 43 at the lower end of the second spring 41 slides on the annular structure 42, and the right-angled side of the annular structure 42 abuts against the surface of the flange gasket 44 and the inner side of the middle body 4 under the elasticity of the second spring 41.

[0035] In this invention, the second spring 41 is tilted outward. Since the flange gasket 44 needs to rotate with the rotating rod 22, the surface of the flange gasket 44 rubs against the surface of the annular structure 42 when the rotating rod 22 rotates. Under the elasticity of the second spring 41, the triangular block 43 moves to the lower right, so that the lower end of the annular structure 42 rubs and slides against the surface of the flange gasket 44. The side of the annular structure 42 abuts against the inner side of the middle body 4 for sealing, thereby sealing the rotation gap between the flange gasket 44 and the valve cover 27, preventing water from overflowing outward from the gap inside the valve cover 27 through the middle body 4, and avoiding the problem of metal rust caused by the seeping water.

[0036] The annular structure 42 includes a deformation ring 421, a track bar 422, a ceramic sheet 423, and a contraction ring 424. The track bar 422 is arranged on the inclined surface of the deformation ring 421, and the contraction rings 424 are arranged inclinedly around the outer side of the deformation ring 421. The lower end of the triangular block 43 is provided with two sliding rods. The sliding rods slide at an inclined position at the track bar 422, and the ceramic sheet 423 at the lower end of the deformation ring 421 presses against the surface of the flange gasket 44. The deformation ring 421 deforms and squeezes outward, so that the contraction ring 424 contracts and abuts against the inner side of the middle body 4.

[0037] Furthermore, the deformation ring 421 is made of rubber, the second spring 41 can generate downward elasticity, and the contraction ring 424 is made of aluminum alloy with "V" shaped splicing, which has a certain elastic deformation effect. The "V" shapes of the contraction ring 424 can contract and move with each other.

[0038] In this invention, when the rotating rod 22 drives the flange gasket 44 to rotate, the lower surface of the ceramic sheet 423 rubs against the surface of the flange gasket 44. When the triangular block 43 moves downward, it slides at an angle within the track bar 422 via the sliding rod, causing the deformation ring 421 to elastically deform outward. This causes the contraction rings 424 to contract and press against the inner side of the middle body 4, providing space for the rotation of the rotating rod 22 while preventing water from entering the middle body 4 through the gap of the valve cover 27. The water is blocked below the annular structure 42 and between the middle body 4 and the valve cover 27, preventing water from seeping upward and overflowing, causing rust and affecting the rotation of the rotating rod 22.

[0039] The above description is merely a preferred embodiment of the present invention, and therefore should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made in accordance with the scope of the patent and the contents of the specification should still fall within the scope of the present invention.

Claims

1. An anti-erosion shut-off valve, characterized in that, It includes a first connector, a valve body mechanism, a valve handle, a middle body, and a second connector. The middle body is sealed by being fixed to the upper end of the valve body mechanism. The valve handle passes through the middle body and rotates to open and close within the valve body mechanism. The left and right ends of the valve body mechanism are connected to water pipes through the second connector and the first connector. The valve body mechanism includes a main body, a rotating rod, a cutting mechanism, a connecting body, a sealing structure, a valve stem, and a valve cover. The cutting mechanism is engaged in the middle of the main body. The upper end of the rotating rod rotates through the valve handle. The valve cover is sealed and fixed to the upper end of the main body, while the middle body is sealed and fixed to the upper end of the valve cover, so that the sealing structure seals between the valve cover and the middle body. The connecting body presses against the cutting mechanism vertically through the valve stem. The rotating rod at the upper end of the valve stem rotates within the middle body, causing the connecting body to rotate offset relative to the cutting mechanism. The cutting mechanism includes a pressure plate, a rotating ring structure, a semi-circular strip, a metal strip, a first flow hole, a second flow hole, a base plate, and a sliding groove. The base plate is horizontally engaged in the middle of the main body. The pressure plate slides and rotates through the rotating ring structure corresponding to the sliding groove on the surface of the base plate. There are two first flow holes in the pressure plate and two second flow holes in the base plate. The first and second flow holes are symmetrically distributed along the same central axis and are arranged vertically. Two metal strips are symmetrically distributed on the surface of the pressure plate through the two first flow holes. The metal strips are sealed and engaged with the semi-circular strip on the surface of the base plate. The outer end of the pressure plate has four slots. The connecting body drives the pressure plate to rotate through the slots and causes the first and second flow holes to open and close in an alternating state. The lower end of the semicircular strip is provided with a fixing block, and is fixed to the surface of the base plate along the edge of the second flow hole by the fixing block. There are two metal strips. When the second flow hole and the first flow hole coincide, the two metal strips on the surface of the pressure plate squeeze and seal the two sides of the semicircular strip. The rotating structure is provided with a force-bearing strip, a rubber strip and a first spring. There are two rubber strips, and the lower ends of the two rubber strips are provided with a force-bearing strip that abuts against the sliding groove. The first spring is arranged in a ring between the force-bearing strips, and the elasticity of the first spring keeps the two force-bearing strips at a stable distance.

2. The anti-erosion shut-off valve according to claim 1, characterized in that, The sealing structure includes a second spring, an annular structure, a triangular block, and a flange gasket. The flange gasket is wrapped around the outside of the rotating rod. The inclined ring of the second spring is located at the lower end of the middle body. The triangular block at the lower end of the second spring slides on the annular structure, and the right-angled side of the annular structure abuts against the surface of the flange gasket and the inner side of the middle body under the elasticity of the second spring.

3. The anti-erosion shut-off valve according to claim 2, characterized in that, The annular structure includes a deformation ring, a track bar, a ceramic plate, and a shrinking ring. The track bar is set on the inclined surface of the deformation ring, and the shrinking rings are arranged inclinedly around the outer side of the deformation ring. Two sliding rods are provided at the lower end of the triangular block. The sliding rods slide at an inclined position at the track bar position, and the ceramic plate at the lower end of the deformation ring presses against the surface of the flange gasket. The deformation ring deforms and squeezes outward, so that the shrinking ring shrinks and abuts against the inner side of the middle body at the same time.

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