Ball valve with additional water-tight seal

Abstract

The application discloses a ball valve with an additional water seepage sealing layer and belongs to the ball valve field. The outer sealing ring is arranged on the basis of the original inner sealing element of the ball valve to form an outer sealing layer on the outer side of the flat head valve rod and the valve body connection part. When the sealing performance of the inner sealing element decreases and water seepage occurs, the seeped water seeps into the hard display ring along the edge of the pressing ring, and under the action of the water guide piece, the halo ring piece in the hard display ring presents multiple vertical color lines. With the extension of the water seepage time, the color lines gradually spread until they contact each other, thereby playing a water seepage early warning role on the workers in the visual aspect. The outer sealing ring can effectively intercept the seeped water from leaking to the outside of the outer sealing ring. Compared with the prior art, the ball valve can continue to be used after water seepage at the flat head valve rod. When the water seeps to the outside of the outer sealing ring and the situation is not serious, only the outer sealing ring needs to be replaced, and the ball valve does not need to be completely disassembled, so that the sealing can be realized again. Compared with the prior art, the interval between two overhauls of the ball valve is effectively prolonged.

Description

Technical Field

[0001] This invention relates to the field of ball valves, and more specifically, to a ball valve with an externally added water-permeable sealing layer. Background Technology

[0002] A ball valve is a valve in which the opening and closing element (ball) is driven by the valve stem and rotates around the valve's axis. It can also be used for fluid regulation and control. Hard-seal V-type ball valves, with their V-shaped ball core and hard alloy-faced metal seat, possess strong shearing force, making them particularly suitable for media containing fibers or small solid particles. Multi-port ball valves in pipelines can flexibly control the merging, splitting, and switching of flow directions of media, and can also close any channel while connecting the other two. These valves should generally be installed horizontally in pipelines. Ball valves are classified according to their actuation method: pneumatic ball valves, electric ball valves, and manual ball valves.

[0003] In the prior art, after a period of use, water leakage often occurs at the edge of the connection between the valve stem and the valve body of the ball valve. Since the sealing element between the two is located in the valve body, the entire ball valve needs to be disassembled for maintenance each time water leakage occurs, which is cumbersome and requires frequent maintenance. Summary of the Invention

[0004] 1. Technical problems to be solved

[0005] To address the problems existing in the prior art, the present invention aims to provide a ball valve with an externally added water-permeable sealing layer. By setting an external sealing ring, an external seal is formed on the outside of the connection between the flat-head valve stem and the valve body, based on the original internal seal of the ball valve. When the sealing performance of the internal seal deteriorates and water seeps out, the seeping water seeps along the edge of the pressure ring into the hard indicator ring. Under the action of the water guide plate, the colored rings inside the hard indicator ring display multiple vertical color patterns. As the seepage time increases, the color patterns gradually spread until they contact each other, thus visually alerting workers to water seepage. Furthermore, the external sealing ring can effectively intercept the seeping water from leaking outside the ring. Compared to the prior art, the valve can continue to be used after water seeps at the flat-head valve stem. Moreover, if water seeps outside the external sealing ring and the situation is not serious, only the external sealing ring needs to be replaced; the entire ball valve does not need to be disassembled, and resealing is achieved. This significantly extends the interval between two maintenance operations of the ball valve compared to the prior art.

[0006] Technical solution

[0007] To solve the above problems, the present invention adopts the following technical solution.

[0008] The utility model provides a kind of additional water seepage sealing layer ball valve, including valve body, the valve body is equipped with valve core, the valve core is connected with flat head valve stem, the valve body upper end is fixedly connected with outer convex ring, the flat head valve stem is equipped with pressure ring, the pressure ring is threadedly connected with outer convex ring inner wall, the flat head valve stem is equipped with multi-paw valve cover, the multi-paw valve cover outer end is fixedly connected with handle, and flat head of flat head valve stem extends to multi-paw valve cover outside, and the end of flat head valve stem located outside multi-paw valve cover is threadedly connected with nut, the flat head valve stem is further equipped with outer seal ring, and the outer seal ring is located in multi-paw valve cover, the flat head part of flat head valve stem is above outer seal ring, and the outer seal ring includes hard visible ring located in outer layer, follow-up sealing sheet fixedly connected on the inner wall above hard visible ring and wall-attached sealing ring fixedly attached to the inner wall at the center of follow-up sealing sheet, the follow-up sealing sheet is saturated filled with fluid, and the hard visible ring includes inner fixed ring located in inner side and two outer visible petals respectively clamped on the outer wall of inner fixed ring, the inner fixed ring and the two outer visible petals form visible water ring groove, a plurality of water collecting grooves are opened in the inner wall of the inner fixed ring, the plurality of water collecting grooves are communicated with the visible water ring groove, and the visible water ring groove is placed with halo ring sheet, and the halo ring sheet is connected with a plurality of water guide sheets corresponding to the plurality of water collecting grooves.

[0009] Further, the outer visible petal is a hard transparent structure, and the two outer visible petals form a complete half-ring structure, and the end of the two outer visible petals close to each other is covered with a rubber layer.

[0010] Further, the follow-up sealing sheet is made of annular flexible sealing material, and the follow-up sealing sheet at the connection with the wall-attached sealing ring is in a wrinkled state, the inner diameter of the wall-attached sealing ring is smaller than the outer diameter of the flat head valve stem, and the wall-attached sealing ring is made of elastic material.

[0011] Further, the inner fixed ring and the outer visible petal are clamped together after mutual clamping to form an annular groove at the bottom, and the lower seal ring is clamped in the annular groove.

[0012] Further, the sum of the heights of the hard visible ring and the lower seal ring exposed outside the hard visible ring is greater than the distance between the upper end of the outer convex ring and the inner top end of the outer seal ring, and the size difference between the two is less than the height of the exposed part of the lower seal ring.

[0013] Further, the upper end of the pressure ring is inclined, and the height of the pressure ring gradually decreases away from the center.

[0014] Further, the water guide sheet includes a color rod fixedly embedded in the halo ring sheet, a sealing strip matched with the water collecting groove opening and a liquid guide sheet fixedly connected between the color rod and the sealing strip, and the end of the liquid guide sheet extends to the inside of the color rod.

[0015] Further, the halo ring sheet and the color rod are made of light-colored water-absorbing material, and the color rod is made of water-soluble material

[0016] Further, the inner top end of the water collecting groove is higher than the edge of the compression ring, and the upper end of the sealing strip is not higher than the edge of the compression ring.

[0017] Further, the inner wall of the outer valve and the outer surface of the compression ring are in contact with each other, and the end faces in contact with each other are polished.

[0018] Advantages

[0019] Compared with the prior art, the advantages of the present application are:

[0020] (1) The outer sealing ring is arranged on the basis of the original inner sealing member of the ball valve, and forms a layer of outer sealing on the outer side of the connection between the flat head valve rod and the valve body. When the sealing performance of the inner sealing member decreases and water seeps out, the seeped water seeps into the hard visible ring along the edge of the compression ring, and under the action of the water guide piece, the halo ring piece in the hard visible ring presents multiple vertical color lines, and as the seepage time prolongs, the color lines gradually spread until they contact each other, thereby visually warning the staff of water seepage, and the outer sealing ring can effectively intercept the seeped water from leaking outside the outer sealing ring. Compared with the prior art, the ball valve can continue to be used after water seeps out at the flat head valve rod, and when water seeps out to the outside of the outer sealing ring and the situation is not serious, only the outer sealing ring needs to be replaced, without the need to disassemble the entire ball valve, so that the ball valve can be resealed again, and the interval between two repairs of the ball valve is greatly and effectively prolonged compared with the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The main explosion structure diagram of the present application is shown;

[0022] Figure 2 The three-dimensional structure diagram of the present application is shown;

[0023] Figure 3 The main explosion structure diagram of the prior art is shown;

[0024] Figure 4 The three-dimensional structure diagram of the outer sealing ring of the present application is shown;

[0025] Figure 5 The three-dimensional structure diagram of the outer sealing ring of the present application is shown;

[0026] Figure 6 The cross-sectional structure diagram of the outer sealing ring of the present application is shown;

[0027] Figure 7 The structure diagram of B in the present application is shown; Figure 6

[0028] The structure diagram of the outer sealing ring of the present application is shown; Figure 8

[0029] The structure diagram of the outer sealing ring of the present application is shown; Figure 9 Figure 8 ​Structure schematic diagram of the middle A;

[0030] Figure 10 Structure schematic diagram of the three-dimensional structure of the water guide piece of the present application;

[0031] Figure 11 Structure schematic diagram of the change of the outer sealing ring after water penetration.

[0032] Explanation of the figure numbers:

[0033] 1 valve body, 2 outer convex ring, 3 pressing ring, 4 flat head valve rod, 5 outer sealing ring, 511 inner fixed ring, 512 outer visible petal, 52 follow-up sealing piece, 53 wall-adhering sealing ring, 61 multi-claw valve cover, 62 handle, 71 water collecting groove, 72 visible water ring groove, 8 halo ring piece, 91 sealing strip, 92 liquid guiding piece, 93 color bar, 10 lower sealing ring. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application; obviously, the described embodiments are only part of the embodiments of the present application, and not all the embodiments; based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0035] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0036] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "sleeved / connected", "connected" and the like should be broadly understood, for example, "connected" can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the communication inside two elements. For a person of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. EMBODIMENT

[0037] Please refer to Figures 1-2The utility model provides a ball valve of additional water seepage sealing layer, including the valve body 1, be equipped with the valve element in the valve body 1, the valve element is connected with the flat head valve stem 4, the valve body 1 upper end fixed connection has the outer convex ring 2, the flat head valve stem 4 is equipped with the compression ring 3, and the compression ring 3 is connected with the inner wall of outer convex ring 2 threadedly, the flat head valve stem 4 is equipped with the multi-paw valve cover 61, and the multi-paw valve cover 61 outer end fixed connection has the handle 62, and the flat head end of flat head valve stem 4 extends to the outside of multi-paw valve cover 61, and the end of flat head valve stem 4 located in the outside of multi-paw valve cover 61 is connected with the nut threadedly.

[0038] The flat head valve stem 4 is also equipped with the outer sealing ring 5, and the outer sealing ring 5 is located in the multi-paw valve cover 61, under the action of the multi-paw valve cover 61, the outer sealing ring 5 is extruded between the inner top of the multi-paw valve cover 61 and the upper end of the outer convex ring 2, effectively guaranteeing the stability of the outer sealing ring 5, the flat head part of the flat head valve stem 4 is located above the outer sealing ring 5, and the bottom of the flat head part coincides with the inner bottom end of the multi-paw valve cover 61, so that the outer sealing ring 5 does not easily affect the rotation of the flat head valve stem 4, and the flat head part of the flat head valve stem 4 is convenient for controlling the rotation thereof through the handle 62 and the multi-paw valve cover 61, thereby driving the valve element to rotate, and realizing the control of the opening and closing of the valve.

[0039] Please refer to Figures 4-5 The outer sealing ring 5 includes a hard visible ring located on the outer layer, a follow-up sealing sheet 52 fixedly connected to the inner wall above the hard visible ring, and a wall-adhering sealing ring 53 fixedly attached to the inner wall at the center of the follow-up sealing sheet 52. The follow-up sealing sheet 52 is made of annular flexible sealing material, and is saturatedly filled with a fluid. The fluid is selected from materials with good fluidity, such as non-toxic colored aqueous solution, so that it can be detected in time in case of accidental leakage. The fluid makes the shape of the follow-up sealing sheet 52 disordered, which can adhere to the surface of the compression ring 3, thereby making the sealing effect at the valve rod better. The hard visible ring includes an inner fixed ring 511 located on the inner side and two outer visible petals 512 respectively clamped to the outer wall of the inner fixed ring 511. The outer visible petals 512 are made of hard transparent structure, and the two outer visible petals 512 form a complete half-ring structure. The end portions of the two outer visible petals 512 close to each other are covered with rubber layers, so that the connection portions of the two outer visible petals 512 are relatively sealed, and water is not easy to seep out of the outer sealing ring 5.

[0040] The follow-up sealing sheet 52 connected to the wall-adhering sealing ring 53 is in a wrinkled state, the inner diameter of the wall-adhering sealing ring 53 is smaller than the outer diameter of the flat head valve stem 4, and the wall-adhering sealing ring 53 is made of elastic material, so that the wall-adhering sealing ring 53 is extruded in contact with the cylindrical part of the flat head valve stem 4.

[0041] As Figures 6-7The water ring groove 72 is formed between the inner fixed ring 511 and the two outer visible petals 512. The inner wall of the inner fixed ring 511 is provided with a plurality of water collecting grooves 71, which are communicated with the water ring groove 72. The halo ring piece 8 is placed in the water ring groove 72. The halo ring piece 8 is connected with a plurality of water guide pieces corresponding to the plurality of water collecting grooves 71. When the flat head valve rod 4 is in the water seepage state, the seeped water overflows along the contact position of the compression ring 3 and the flat head valve rod 4, gradually spreads to the edge of the compression ring 3 and the outer sealing ring 5, and then enters the water collecting groove 71. At this time, part of the water directly contacts the halo ring piece 8, so that the halo ring piece 8 is wetted. Part of the water seeps into the color stick 93 along the water guide piece, so that the water is dissolved in the color stick 93 in a bidirectional manner, and the halo ring piece 8 is dyed and spread on the halo ring piece 8, so that the color lines are first formed and then connected, so that the halo ring piece 8 is generally discolored. The staff can observe the change of the halo ring piece 8 through the gap between the adjacent two claw parts, so as to realize the water seepage reminding effect on the staff.

[0042] Please refer to Figure 8 The annular groove is formed at the bottom of the inner fixed ring 511 and the outer visible petal 512 after they are clamped and spliced. The lower sealing ring 10 is clamped in the annular groove. The sum of the heights of the hard visible ring and the lower sealing ring 10 exposed outside the hard visible ring is greater than the distance between the upper end of the outer convex ring 2 and the inner top end of the outer sealing ring 5. The size difference between the two is less than the height of the exposed part of the lower sealing ring 10, so that the top part of 6 is pressed on the outer sealing ring 5 after installation, so that the lower sealing ring 10 at the bottom is deformed, and then tightly contacts with the outer convex ring 2, so as to effectively ensure the outer sealing effect of the outer sealing ring 5 on the gap between the flat head valve rod 4 and the compression ring 3.

[0043] As Figure 9 The top end of the water collecting groove 71 is higher than the edge of the compression ring 3, and the upper end of the sealing strip 91 is not higher than the edge of the compression ring 3, so that 7 presents an opening part above, which is located on the compression ring 3 to facilitate water inflow, so that the exuded water enters 7, and the upper end of the compression ring 3 is inclinedly arranged, and the height of the compression ring 3 gradually decreases along the direction away from the center, so as to facilitate the water overflowing from the middle part of the compression ring 3 to move downward along the inclined position, and then seep into 7 through the opening part above 7, so that the halo ring piece 8 changes.

[0044] Please refer to Figure 10 The water guide piece includes the sealing strip 91 matched with the opening part of the water collecting groove 71, the color stick 93 fixedly embedded in the halo ring piece 8, and the liquid guide piece 92 fixedly connected between the color stick 93 and the sealing strip 91. The end part of the liquid guide piece 92 extends to the inside of the color stick 93. The halo ring piece 8 and the color stick 93 are made of light-colored water-absorbing material. The color stick 93 is made of water-soluble material, so that the color stick 93 is dissolved after contacting with water, causes the halo ring piece 8 to change color, so as to achieve the reminding effect on the staff.

[0045] It is worth noting that the color of the color stick 93 is inconsistent with the color of the fluid.

[0046] By setting the outer sealing ring 5, an outer seal is formed on the outside of the connection between the flat-head valve stem 4 and the valve body 1, based on the original internal seal of the ball valve. When the sealing performance of the internal seal deteriorates and water leakage occurs, such as Figure 11 The seeping water seeps along the edge of the pressure ring 3 into the hard display ring. Under the action of the water-guiding plate, the color-changing ring plate 8 inside the hard display ring displays multiple vertical color patterns. As the seepage time increases, the color patterns gradually spread until they come into contact with each other, thus visually alerting workers to the water seepage. Furthermore, the outer sealing ring 5 effectively intercepts the seeping water from leaking outside the outer sealing ring 5. Compared to... Figure 3 The existing technology allows the valve to continue operating even after water seeps into the flat-head valve stem 4. Furthermore, if water seeps out to the outer sealing ring 5 and the situation is not serious, only the outer sealing ring 5 needs to be replaced, without disassembling the entire ball valve, and resealing can still be achieved. Compared with the current technology, this significantly and effectively extends the interval between two ball valve maintenance and reduces the maintenance frequency.

[0047] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto; any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solution and its improved concept, should be covered within the scope of protection of the present invention.

Claims

1. An additional water permeable sealing layer ball valve, comprising a valve body (1), a valve core is arranged in the valve body (1), a flat head valve rod (4) is connected to the valve core, an outer convex ring (2) is fixedly connected to the upper end of the valve body (1), a pressure ring (3) is arranged on the outer sleeve of the flat head valve rod (4), the pressure ring (3) is threadedly connected with the inner wall of the outer convex ring (2), a multi-claw valve cover (61) is arranged on the outer sleeve of the flat head valve rod (4), a handle (62) is fixedly connected to the outer end of the multi-claw valve cover (61), the flat head end of the flat head valve rod (4) extends to the outside of the multi-claw valve cover (61), and a nut is threadedly connected to the end of the flat head valve rod (4) located outside the multi-claw valve cover (61). The flat head valve stem (4) is further sleeved with an outer sealing ring (5), the outer sealing ring (5) is located in the multi-claw valve cover (61), the flat head part of the flat head valve stem (4) is located above the outer sealing ring (5), the outer sealing ring (5) comprises a hard sealing ring located on the outer layer, a following sealing sheet (52) fixedly connected to the inner wall above the hard sealing ring and a wall-attached sealing ring (53) fixedly attached to the inner wall at the center of the following sealing sheet (52), the following sealing sheet (52) is saturatedly filled with fluid, the hard sealing ring comprises an inner fixed ring (511) located on the inner side and two outer sealing petals (512) respectively clamped to the outer wall of the inner fixed ring (511), a sealing water ring groove (72) is formed between the inner fixed ring (511) and the two outer sealing petals (512), a plurality of water collecting grooves (71) are opened in the inner wall of the inner fixed ring (511), the plurality of water collecting grooves (71) are communicated with the sealing water ring groove (72), and a halo ring sheet (8) is placed in the sealing water ring groove (72), a plurality of water guide sheets corresponding to the plurality of water collecting grooves (71) are connected to the halo ring sheet (8); The water guide sheet comprises a sealing strip (91) matched with the mouth of the water collecting groove (71), a color rod (93) fixedly embedded in the halo ring sheet (8) and a liquid guide sheet (92) fixedly connected between the color rod (93) and the sealing strip (91), and the end of the liquid guide sheet (92) extends to the inside of the color rod (93).

2. A ball valve with an applied water tight seal according to claim 1, wherein: The outer sealing petals (512) are hard transparent structures, the two outer sealing petals (512) form a complete half-ring structure, and the ends of the two outer sealing petals (512) close to each other are covered with rubber layers.

3. A ball valve with an applied water tight seal according to claim 2, wherein: The following sealing sheet (52) is made of annular flexible sealing material, and the following sealing sheet (52) at the connection with the wall-attached sealing ring (53) is in a wrinkled state, the inner diameter of the wall-attached sealing ring (53) is smaller than the outer diameter of the flat head valve stem (4), and the wall-attached sealing ring (53) is made of elastic material.

4. A ball valve with an applied water tight seal according to claim 1, wherein: The inner fixed ring (511) and the outer sealing petals (512) are clamped together to form an annular groove at the bottom.

5. A ball valve with an applied water tight seal according to claim 4, wherein: The sum of the heights of the hard sealing ring and the lower sealing ring (10) exposed outside the hard sealing ring is greater than the distance between the upper end of the outer convex ring (2) and the inner top end of the outer sealing ring (5), and the size difference is less than the height of the exposed part of the lower sealing ring (10).

6. A ball valve with an applied water tight seal according to claim 1, wherein: The upper end of the pressing ring (3) is inclined, and the height of the pressing ring (3) gradually decreases away from the center.

7. A ball valve with an applied water tight seal according to claim 1, wherein: The halo ring sheet (8) and the color rod (93) are made of light-colored water-absorbing material, and the color rod (93) is made of water-soluble material.

8. A ball valve with an applied water tight seal according to claim 7, wherein: The inner top end of the water collecting groove (71) is higher than the edge of the pressing ring (3), and the upper end of the sealing strip (91) is not higher than the edge of the pressing ring (3).

9. A ball valve with an applied water tight seal according to claim 8, wherein: The inner wall of the outer sealing petals (512) and the outer surface of the pressing ring (3) are in contact with each other, and the end surfaces of the two are polished.

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