Ball valve with high-strength valve rod

Abstract

The utility model relates to the technical field of ball valves, in particular to a ball valve with a high-strength valve rod, which comprises a handle, a valve rod, a ball core and a main body, an opening allowing the valve rod to penetrate through is arranged on the side wall of the main body, the ball core is movably mounted in the main body, one end of the valve rod penetrates through the opening and is fixedly connected with the ball core, and the other end of the valve rod is connected with the handle. A sealing piece is arranged between the valve rod and the main body; a mounting hole is formed in the valve rod, the axis of the mounting hole coincides with the axis of the valve rod, the reinforcing rod is mounted in the mounting hole, the mechanical strength of the reinforcing rod is larger than that of the valve rod, and during mounting, the reinforcing rod is mounted in the mounting hole of the valve rod, and a whole formed by combining the valve rod, the ball core and the reinforcing rod is mounted in the main body. The valve rod penetrates through the opening of the main body, the handle is installed on the valve rod, and installation is completed; the reinforcing rod with the strength higher than that of the valve rod is arranged in the mounting hole of the valve rod, the strength of the valve rod can be improved, and the ball valve is prevented from being broken in the transportation or use process.

Description

TECHNICAL FIELD

[0001] The utility model relates to ball valve technical field more particularly, relate to a ball valve with high strength valve stem. BACKGROUND

[0002] At present, the packing mode of PVC-U water supply integral injection ball valve is to pack a certain amount of products in a small paper box, and then pack the small paper box into a large paper box, so that the weight of the large paper box is heavy, and the paper box is inevitably subjected to a large collision during the transfer loading or unloading process, the ball valve is subjected to a large impact, and the valve stem of the ball valve is prone to breakage. In addition, the ball valve is often broken during use due to a large opening and closing torque. SUMMARY

[0003] The utility model discloses a ball valve with high strength valve stem to overcome the deficiency of the anti-fracture capacity of the valve stem in the prior art, and the strength of the valve stem is improved to prevent the valve stem from being broken.

[0004] To solve the above technical problems, the utility model adopts the technical scheme of:

[0005] The utility model provides a ball valve with high strength valve stem, including handle, valve stem, ball core and main part, the lateral wall of main part is equipped with the opening that allows valve stem to pass, ball core moves installation in main part, valve stem one end passes through opening, and with ball core fixed connection, the other end is connected with handle, still include reinforcing rod, the installation hole is equipped with in valve stem, the axis of installation hole coincides with the axis of valve stem, reinforcing rod sets up in installation hole, the side surface of reinforcing rod all with the bottom surface with the inner wall of installation hole abuts, and the mechanical strength of reinforcing rod is greater than the mechanical strength of valve stem.

[0006] The ball valve with high strength valve stem of the utility model, when installing, the reinforcing rod is installed in the installation hole of the valve stem, the valve stem with the reinforcing rod inside is connected with the ball core, the combination of the valve stem, the ball core and the reinforcing rod is installed in the main body, the valve stem passes through the opening of the main body, the handle is installed on the valve stem, and the installation is completed. The reinforcing rod with higher mechanical strength than the valve stem is arranged in the installation hole of the valve stem, which can improve the strength of the valve stem and prevent the ball valve from breaking during transportation or use.

[0007] Further, a plurality of reinforcing ribs are arranged on the outer periphery of the reinforcing rod, and the reinforcing ribs are arranged in the same direction as the axis of the reinforcing rod. The reinforcing ribs can improve the strength of the reinforcing rod, help the reinforcing rod resist the torque of the valve stem, and improve the bending strength and impact resistance of the valve stem.

[0008] Further, a plurality of reinforcing ribs are evenly distributed along the outer circumferential direction of the reinforcing rod. The reinforcing ribs are evenly distributed along the outer circumference of the reinforcing rod, which can make the reinforcing rod bear force evenly in the circumferential direction and reduce stress concentration.

[0009] Further, the valve stem, the ball core and the main body are all plastic structures, and the reinforcing rod is a metal structure. When the ball valve is manufactured by using the secondary injection molding process, the valve stem, the ball core and the main body are all plastic structures, which can avoid deformation caused by heat. By arranging the metal reinforcing rod in the plastic valve stem, the valve stem can be prevented from being broken due to the low strength of the plastic when the valve stem is impacted or subjected to torsion.

[0010] Further, a plurality of annular grooves are arranged on the outer circumference of the reinforcing rod, and the axes of the annular grooves coincide with the axis of the reinforcing rod. After the valve stem and the reinforcing rod are combined by injection molding, the inner wall of the annular groove abuts against the inner wall of the mounting hole, the annular groove plays a role of limiting the axial displacement of the reinforcing rod, and the reinforcing rod is prevented from being axially displaced relative to the valve stem.

[0011] Further, the valve stem comprises a prismatic section and a cylindrical section with the same axis, one end of the cylindrical section is connected with the ball core, the other end of the cylindrical section is connected with the prismatic section, the axial section of the prismatic section is a polygon, the axial section of the cylindrical section is a circle, and the handle is arranged on the prismatic section. The cross section of the prismatic section is a polygon, which can prevent the valve stem from being relatively rotated with the handle when the handle is rotated, and facilitates use.

[0012] Further, a circular arc is arranged between adjacent sides of the cross section of the prismatic section, the center of the circular arc is the same as the center of the cylindrical section, and the diameter of the circular arc is equal to the diameter of the cylindrical section. The distance between opposite sides of the cross section of the prismatic section can be increased, the cross section area of the prismatic section can be increased, the difference between the cross section areas of the prismatic section and the cylindrical section can be reduced, the impact resistance and the bending strength of the prismatic section can be improved, stress concentration at the intersection of the prismatic section and the cylindrical section can be reduced, and the impact resistance and the bending strength of the valve stem can be improved.

[0013] Further, a transition section is arranged between the prismatic section and the cylindrical section, and a transition inclined surface is arranged on the side wall of the transition section. The transition inclined surface arranged between the prismatic section and the cylindrical section can reduce stress concentration.

[0014] Further, the bottom of the reinforcing rod is not higher than the bottom of the transition section. The end of the reinforcing rod away from the ball core is defined as the upper end, and the end of the reinforcing rod close to the ball core is defined as the lower end. When the valve stem is impacted or the handle is rotated, the intersection of the prismatic section and the cylindrical section bears the most force and has the lowest strength. The reinforcing rod passes through the transition section, which can effectively improve the impact resistance and the bending capacity of the valve stem.

[0015] Further, the first sealing member is arranged between the outer wall of the valve rod and the inner wall of the opening and abuts against the valve rod and the inner wall of the opening, and the second sealing member is arranged between the ball core and the inner wall of the main body and abuts against the ball core and the main body. The first sealing member improves the sealing between the valve rod and the main body, the second sealing member improves the sealing between the ball core and the main body, and the first sealing member and the second sealing member cooperate to realize double sealing of the ball valve.

[0016] Compared with the prior art, the ball valve with the high-strength valve rod has the following beneficial effects:

[0017] The ball valve with the high-strength valve rod has the following beneficial effects: 1. The reinforcing rod with higher strength is arranged in the valve rod to improve the impact resistance and bending strength of the valve rod and prevent the valve rod from being broken when the ball valve is impacted or subjected to a torsion force; 2. The adjacent edges of the prism section of the valve rod are provided with a circular arc, which can increase the opposite edge distance of the prism section, increase the cross-sectional area of the prism section, reduce the cross-sectional area difference between the prism section and the cylindrical section, reduce the stress concentration at the intersection of the prism section and the cylindrical section, and improve the strength of the valve rod; and 3. The bottom of the reinforcing rod is not higher than the bottom of the transition section, which maximizes the strength of the transition section and prevents the most fragile transition section from being broken. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 FIG. 1 is a first structural schematic view of the ball valve with the high-strength valve rod of the present application;

[0019] Figure 2 FIG. 2 is a second structural schematic view of the ball valve with the high-strength valve rod of the present application;

[0020] Figure 3 FIG. 3 is a structural schematic view of the reinforcing rod of the ball valve with the high-strength valve rod of the present application;

[0021] Figure 4 FIG. 4 is a structural schematic view of the valve rod of the ball valve with the high-strength valve rod of the present application;

[0022] Figure 5 FIG. 5 is a first structural schematic view of the valve rod provided with the reinforcing rod of the ball valve with the high-strength valve rod of the present application;

[0023] Figure 6 FIG. 6 is a second structural schematic view of the valve rod provided with the reinforcing rod of the ball valve with the high-strength valve rod of the present application.

[0024] In the drawings: 1, valve rod; 11, prism section; 12, transition section; 121, transition inclined surface; 13, cylindrical section; 131, first sealing member; 2, reinforcing rod; 21, reinforcing rib; 22, annular groove; 3, ball core; 31, second sealing member; 4, main body; 41, opening; 5, handle. Detailed Implementation

[0025] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0026] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0027] Example 1

[0028] like Figures 1 to 6 The first embodiment of the ball valve with a high-strength valve stem of this utility model is shown, including a handle 5, a valve stem 1, a ball core 3, and a body 4. The side wall of the body 4 has an opening 41 allowing the valve stem 1 to pass through. The ball core 3 is movably installed inside the body 4. One end of the valve stem 1 passes through the opening 41 and is fixedly connected to the ball core 3, while the other end is connected to the handle 5. A sealing element is provided between the valve stem 1 and the body 4. Figure 1 and Figure 2 As shown; it also includes a reinforcing rod 2. The valve stem 1 has a mounting hole, the axis of which coincides with the axis of the valve stem 1. The reinforcing rod 2 is installed in the mounting hole, and its side and bottom surfaces abut against the inner wall of the mounting hole. The mechanical strength of the reinforcing rod 2 is greater than that of the valve stem 1. Figure 5 As shown.

[0029] This invention relates to a ball valve with a high-strength valve stem. During installation, a reinforcing rod 2 is installed in the mounting hole of the valve stem 1, connecting the valve stem 1 with the ball core 3. The valve stem 1, ball core 3, and reinforcing rod 2 are then installed as a whole in the main body 4. The valve stem 1 passes through the opening 41 of the main body 4, and the handle 5 is installed on the valve stem 1 to complete the installation. The reinforcing rod 2, which has a higher strength than the valve stem 1, is placed in the mounting hole of the valve stem 1, which can improve the strength of the valve stem 1 and prevent the ball valve from breaking during transportation or use.

[0030] The reinforcing rod 2 capable of being combined with the valve rod 1 and enhancing the strength of the valve rod 1 can be applicable to the utility model, and the reinforcing rod 2 listed in the embodiment is not regarded as the limitation of the utility model. In the embodiment, the valve rod 1, the ball core 3 and the main body 4 are plastic structures, and the reinforcing rod 2 is a metal structure. When the ball valve adopts the secondary injection molding process, the valve rod 1, the ball core 3 and the main body 4 being plastic structures can avoid thermal deformation; by setting the metal structure reinforcing rod 2 in the plastic structure valve rod 1, the valve rod 1 can be prevented from being broken due to the low strength of the plastic when the valve rod 1 receives impact or torque. Specifically, the valve rod 1, the ball core 3 and the main body 4 all adopt PVC-U material, the fluid resistance is small, the anti-aging ability is strong, and the service life is long.

[0031] The reinforcing rod 2 is connected with the valve rod 1 through injection molding. The valve rod 1 and the reinforcing rod 2 are combined into an integral whole through injection molding, so that the combination of the reinforcing rod 2 and the valve rod 1 is more compact, and the strength of the valve rod 1 is improved.

[0032] As shown in Figure 1 The first sealing element 131 is arranged between the outer wall of the valve rod 1 and the inner wall of the opening 41 and abuts against the valve rod 1 and the inner wall of the opening 41, and the second sealing element 31 is arranged between the inner wall of the ball core 3 and the main body 4 and abuts against the ball core 3 and the main body 4. The first sealing element 131 improves the sealing property between the valve rod 1 and the main body 4, the second sealing element 31 improves the sealing property between the ball core 3 and the main body 4, the first sealing element 131 and the second sealing element 31 cooperate to realize double sealing of the ball valve. In the embodiment, the first sealing element 131 is an O-shaped ring, the second sealing element 31 is a gasket, and two second sealing elements 31 are arranged, the axes of the two second sealing elements 31 coincide with the axis of the valve rod 1 and are mirror-symmetric relative to the horizontal axis of the main body 4.

[0033] The working principle of the ball valve with a high-strength valve rod in the embodiment is as follows: the reinforcing rod 2 is placed in the mold of the valve rod 1 and the ball core 3, and is integrally formed through injection molding, and the reinforcing rod 2 is located in the mounting hole of the valve rod 1; the gasket is sleeved on the outer surface of the ball core 3, the whole formed by the valve rod 1, the ball core 3 and the reinforcing rod 2 is placed in the mold of the main body 4 together with the gasket, and is formed through secondary injection molding, the second sealing element 31 is sleeved on the valve rod 1, the inner side and the outer side of the second sealing element 31 abut against the valve rod 1 and the inner wall of the opening 41 respectively, glue is applied on the valve rod 1, the handle 5 is bonded on the valve rod 1, and the molding and installation of the ball valve are completed. The valve rod 1 of the plastic structure and the reinforcing rod 2 of the metal structure form a steel-plastic composite structure through injection molding, effectively improve the structural strength of the valve rod 1, improve the impact resistance and bending strength of the valve rod 1, and prevent the valve rod 1 from being broken when the ball valve is impacted or subjected to torque.

[0034] Embodiment two

[0035] The second embodiment of the ball valve with the high-strength valve rod of the utility model is similar to the first embodiment, and the difference is that, as shown in Figure 3 As shown in the figure, the outer periphery of the reinforcing rod 2 is provided with a plurality of reinforcing ribs 21, and the direction of the reinforcing ribs 21 is the same as the axis direction of the reinforcing rod 2. The reinforcing ribs 21 can improve the strength of the reinforcing rod 2, help the reinforcing rod 2 resist the torsion of the valve rod 1, and improve the bending strength and impact resistance of the valve rod 1.

[0036] The plurality of reinforcing ribs 21 are uniformly distributed along the outer peripheral direction of the reinforcing rod 2. The uniform distribution of the reinforcing ribs 21 on the outer periphery of the reinforcing rod 2 can make the reinforcing rod 2 bear the force uniformly in the circumferential direction, reduce stress concentration

[0037] As shown in the figure, Figure 3 As shown in the figure, the outer periphery of the reinforcing rod 2 is provided with a plurality of annular grooves 22, and the axis of the annular grooves 22 coincides with the axis of the reinforcing rod 2. After the valve rod 1 and the reinforcing rod 2 are combined by injection molding, the inner wall of the annular groove 22 abuts against the inner wall of the mounting hole, and the annular groove 22 plays an axial limiting role on the reinforcing rod 2, preventing the reinforcing rod 2 from axially displacing relative to the valve rod 1.

[0038] In this embodiment, there are three groups of reinforcing ribs 21 distributed along the axis direction of the reinforcing rod 2, each group of reinforcing ribs 21 includes four reinforcing ribs 21 uniformly distributed along the outer periphery of the reinforcing rod 2, and the annular groove 22 is arranged between the adjacent two groups of reinforcing ribs 21.

[0039] The working principle of the ball valve with the high-strength valve rod of the embodiment is as follows: when the reinforcing rod 2 is placed in the mold for injection molding, the molten plastic wraps the outer wall of the reinforcing rod 2 and the reinforcing ribs 21, and fills into the annular groove 22. After the injection molding is completed, the reinforcing ribs 21 can improve the strength of the reinforcing rod 2, help the reinforcing rod 2 resist the horizontal torsion of the valve rod 1, the plastic filled in the annular groove 22 plays an axial limiting role on the reinforcing rod 2, prevents the reinforcing rod 2 from axially displacing relative to the valve rod 1, and makes the combination of the valve rod 1 and the reinforcing rod 2 more reliable.

[0040] Embodiment three

[0041] The third embodiment of the ball valve with the high-strength valve rod of the utility model is similar to the second embodiment, and the difference is that, as shown in Figure 4 and Figure 6As shown in the figure, the valve stem 1 comprises a prismatic section 11 and a cylindrical section 13 with the same axis, the cylindrical section 13 is connected with the ball core 3 at one end and connected with the prismatic section 11 at the other end, the axial section of the prismatic section 11 is polygonal, the axial section of the cylindrical section 13 is circular, and the handle 5 is installed on the prismatic section 11. The cross section of the prismatic section 11 is polygonal, which can prevent the relative rotation between the valve stem 1 and the handle 5 when the handle 5 is rotated, and is convenient to use. The cross section of the prismatic section 11 can be triangular, quadrangular, etc. In the embodiment, the cross section of the prismatic section 11 is hexagonal.

[0042] As shown in the figure, Figure 4 and Figure 6 As shown in the figure, the adjacent edges of the cross section of the prismatic section 11 are provided with a circular arc, the center of the circular arc is the same as the center of the cylindrical section 13, and the diameter of the circular arc is equal to the diameter of the cylindrical section 13. The opposite side distance of the cross section of the prismatic section 11 can be increased, the cross section area of the prismatic section 11 can be increased, the cross section area difference between the prismatic section 11 and the cylindrical section 13 can be reduced, the impact resistance and the bending strength of the prismatic section 11 can be improved, the stress concentration at the intersection of the prismatic section 11 and the cylindrical section 13 can be reduced, and the impact resistance and the bending strength of the valve stem 1 can be improved.

[0043] As shown in the figure, Figure 4 As shown in the figure, the side wall of the prismatic section 11 and the side wall of the cylindrical section 13 are connected with the transition section 12, and the transition section 12 is provided with a transition inclined surface 121 on the side wall. The transition inclined surface 121 can be arranged between the prismatic section 11 and the cylindrical section 13 to reduce stress concentration. In the embodiment, the transition inclined surface 121 is connected between the planar part on the side wall of the prismatic section 11 and the side wall of the cylindrical section 13, the transition inclined surface 121 is an arc surface, and the two side edges of the transition inclined surface 121 in the axial direction of the valve stem 1 are respectively tangent to the side wall of the prismatic section 11 and the side wall of the cylindrical section 13, so that the transition between the prismatic section 11 and the cylindrical section 13 is more gentle, and the stress concentration is further reduced.

[0044] As shown in the figure, Figure 1 As shown in the figure, the bottom of the reinforcing rod 2 is not higher than the bottom of the transition section 12. The end of the reinforcing rod 2 away from the ball core 3 is the upper end, the intersection of the prismatic section 11 and the cylindrical section 13 is the most stressed and the lowest in strength when the valve stem 1 collides or the handle 5 rotates, the reinforcing rod 2 passes through the transition section 12, which can effectively improve the impact resistance and the bending capacity of the valve stem 1. In the embodiment, the bottom of the reinforcing rod 2 is lower than the bottom of the transition section 12 to ensure that the reinforcing rod 2 can play the maximum role in strengthening the transition section 12; the top of the reinforcing rod 2 is flush with the top end surface of the prismatic section 11 to prevent the reinforcing rod 2 from interfering with the handle 5.

[0045] The working principle of the ball valve with the high-strength valve stem of the embodiment is as follows: when the valve stem 1 is injection molded, the bottom of the reinforcing rod 2 is lower than the bottom of the transition section 12, and the top is flush with the top end face of the prism section 11, so as to ensure the reinforcing effect on the transition section 12 which is most prone to breakage; after the injection molding is completed, the valve stem 1 is installed into the main body 4, the first sealing member 131 is sleeved on the cylindrical section 13, glue is applied on the prism section 11, and the handle 5 is bonded on the prism section 11; the hexagon of the hexagonal section of the prism section 11 is designed as an arc which is coincident with the cross section of the cylindrical section 13, so that the opposite side distance of the cross section of the prism section 11 is increased, the cross section area of the prism section 11 is increased, the cross section area difference between the prism section 11 and the cylindrical section 13 is reduced, the impact resistance and the bending strength of the prism section 11 are improved, and the stress concentration at the intersection of the prism section 11 and the cylindrical section 13 is reduced; the transition inclined surface 121 is designed on the transition section 12 between the prism section 11 and the cylindrical section 13, so that the stress concentration at the intersection of the prism section 11 and the cylindrical section 13 is further reduced.

[0046] In the specific contents of the above specific embodiments, any non-contradictory combination of technical features can be made, and in order to make the description simple, all possible combinations of the above technical features are not described, however, as long as the combination of the technical features does not exist contradiction, it should be considered that it is within the scope of the present application.

[0047] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For ordinary skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, all the implementation modes are not required or can not be exhausted. Any modification, equivalent replacement and improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A ball valve with a high-strength stem, comprising a handle (5), a stem (1), a ball core (3), and a body (4), wherein the side wall of the body (4) is provided with an opening (41) allowing the stem (1) to pass through, the ball core (3) is movably installed within the body (4), one end of the stem (1) passes through the opening (41) and is fixedly connected to the ball core (3), and the other end is connected to the handle (5), characterized in that, It also includes a reinforcing rod (2), the valve stem (1) is provided with a mounting hole, the axis of the mounting hole coincides with the axis of the valve stem (1), the reinforcing rod (2) is installed in the mounting hole, the side and bottom surfaces of the reinforcing rod (2) abut against the inner wall of the mounting hole, and the mechanical strength of the reinforcing rod (2) is greater than that of the valve stem (1).

2. The ball valve with a high-strength stem according to claim 1, characterized in that, The reinforcing rod (2) is provided with a plurality of reinforcing ribs (21) on its outer periphery, and the extending direction of the reinforcing ribs (21) is the same as the axial direction of the reinforcing rod (2).

3. The ball valve with a high-strength stem according to claim 2, characterized in that, Several of the reinforcing ribs (21) are evenly distributed along the outer periphery of the reinforcing rod (2).

4. The ball valve with a high-strength stem according to claim 1, characterized in that, The valve stem (1), the ball core (3) and the main body (4) are all made of plastic, while the reinforcing rod (2) is made of metal.

5. The ball valve with a high-strength stem according to claim 1, characterized in that, The reinforcing rod (2) has several annular grooves (22) on its outer periphery, and the axis of the annular grooves (22) coincides with the axis of the reinforcing rod (2).

6. The ball valve with a high-strength stem according to any one of claims 1 to 5, characterized in that, The valve stem (1) includes a prism segment (11) and a cylindrical segment (13) with the same axis. One end of the cylindrical segment (13) is connected to the ball core (3), and the other end is connected to the prism segment (11). The axial cross section of the prism segment (11) is polygonal, and the axial cross section of the cylindrical segment (13) is circular.

7. The ball valve with a high-strength stem according to claim 6, characterized in that, The prism segment (11) has an arc between adjacent sides of its cross section, the center of the arc being the same as the center of the cylindrical segment (13), and the diameter of the arc being equal to the diameter of the cylindrical segment (13).

8. The ball valve with a high-strength stem according to claim 6, characterized in that, A transition section (12) connects the prism segment (11) and the cylindrical segment (13), and a transition slope (121) is provided on the side wall of the transition section (12).

9. The ball valve with a high-strength stem according to claim 8, characterized in that, The bottom of the reinforcing rod (2) is not higher than the bottom of the transition section (12).

10. The ball valve with a high-strength stem according to claim 1, characterized in that, It also includes a first seal (131) and a second seal (31). The first seal (131) is disposed between the outer wall of the valve stem (1) and the inner wall of the opening (41) and abuts against the valve stem (1) and the inner wall of the opening (41). The second seal (31) is disposed between the inner wall of the ball core (3) and the inner wall of the body (4) and abuts against the ball core (3) and the body (4).

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