Top opening type polyethylene ball valve

Abstract

The utility model discloses an upper opening type polyethylene ball valve, which comprises a valve body, and further comprises a ball body, an upper opening type polyethylene ball, a lower opening type polyethylene ball, an upper opening type polyethylene ball and a lower opening type polyethylene ball, the annular groove is formed in the ball body; the sealing piece is located in the annular groove and moves along with the ball body; wherein when the valve body is in a closed state, the sealing piece faces an inlet of the valve body and is connected with the valve body in a sealed mode, when the valve body is in an open state, the sealing piece does not make contact with the interior of the valve body, and when the valve body is in the closed state, the sealing piece is arranged in the annular groove; the sealing piece faces the inlet of the valve body and is connected with the valve body in a sealed mode, when the valve body is in an open state, the sealing piece does not make contact with the interior of the valve body, so that only when the valve body needs to be closed, the sealing piece can move to make contact with the valve body, the valve body is sealed, and the service life of the sealing piece is prolonged; therefore, abrasion between the sealing piece and the valve body is not prone to occurring.

Description

Technical Field

[0001] The utility model belongs to the technical field of polyethylene ball valves, and particularly relates to an upward-opening polyethylene ball valve. Background Art

[0002] A polyethylene ball valve, also known as a PVC ball valve, is a valve made of PVC material, mainly used to cut off or connect the medium in the pipeline, and can also be used for the regulation and control of fluids.

[0003] In the existing PVC ball valves, the sealing is usually achieved by the cooperation between the ball in the valve body and the two valve seats in the valve body. Whether the ball in the valve body is in the open state or the closed state, the surface of the ball always contacts the valve seat, and due to the continuous friction between the ball and the valve seat during the rotation of the ball, the wear of the valve seat is greater, and its service life is easily reduced. Summary of the Invention

[0004] To solve the above technical problems, the utility model provides the following technical solutions. An upward-opening polyethylene ball valve includes a valve body having an inlet and an outlet, and is characterized by further comprising:

[0005] A ball, which is rotatably arranged in the valve body and is used to open and close the valve body;

[0006] A ring groove, which is formed on the ball;

[0007] A seal, which is located in the ring groove and moves along with the ball;

[0008] Wherein, when the valve body is in the closed state, the seal faces the inlet of the valve body and is sealingly connected to the valve body. When the valve body is in the open state, the seal does not contact the inside of the valve body.

[0009] Further, the ball includes:

[0010] A ball main body, on the outer surface of which there is a flat surface;

[0011] An installation cover;

[0012] An installation assembly, through which the installation cover is arranged on the flat surface of the ball main body;

[0013] Wherein, the ring groove is formed by the ball main body and the installation cover.

[0014] Further, the installation assembly includes:

[0015] An installation step, which is fixedly arranged on the flat surface of the ball main body;

[0016] A threaded post, which is fixedly arranged on the installation step;

[0017] A threaded hole, wherein the mounting cover is provided with a threaded hole matching the threaded column;

[0018] Wherein, the sealing member is sleeved on the installation step, the left side of the sealing member contacts the installation cover, and the right side of the sealing member contacts the plane of the ball body.

[0019] Furthermore, the length of the threaded column is smaller than the depth of the threaded hole.

[0020] Furthermore, the outer ring of the sealing element has rounded corners.

[0021] Furthermore, it also includes:

[0022] The bend groove is arranged on the outer surface of the mounting cover and is used for rotating the mounting cover.

[0023] Furthermore, the thickness of the installation step is smaller than the thickness of the sealing element.

[0024] The beneficial effects of the utility model are:

[0025] 1. By opening an annular groove on the sphere and arranging a sealing member in the annular groove, when the valve body is in a closed state, the sealing member faces the inlet of the valve body and is sealed and connected to the valve body, and when the valve body is in an open state, the sealing member does not contact the inside of the valve body, so that the sealing member will move to contact the valve body only when the valve body needs to be closed, thereby sealing the valve body, extending the service life of the sealing member and preventing wear between the sealing member and the valve body.

[0026] 2. The sphere is divided into a sphere main body and a mounting cover, and the mounting cover can be detachably connected to the sphere main body through the mounting assembly. If the seal is made of a material that is easy to stretch, the seal can be directly stretched into the annular groove. If the seal is made of a material that is not easy to stretch, the seal can be placed in the annular groove by installing the detachable connection with the sphere main body, which facilitates the installation of the seal on the sphere. After the seal is installed on the sphere main body, the annular groove is formed between the mounting cover and the plane of the sphere, which is convenient for adapting to seals of different materials.

[0027] 3. The installation step is set up to facilitate the positioning of the seal when the seal is placed. The outer ring of the installation step cooperates with the inner ring of the seal, so that the seal is accurately placed. At the same time, the cooperation between the threaded column and the threaded hole facilitates the installation and disassembly between the ball body and the installation cover.

[0028] 4. By setting an installation step, it is convenient to position the seal when the seal is placed. Through the cooperation between the outer ring of the installation step and the inner ring of the seal, the position of the seal can be accurately positioned, ensuring that the seal is placed accurately. At the same time, the cooperation between the threaded post and the threaded hole facilitates the installation and disassembly between the ball body and the installation cover. If the installation of the overall components of the sphere is completed, since the threaded hole is penetrated and both the ball body and the installation cover are made of PVC material, after tightening the installation cover on the ball body, heat fusion welding can be performed between the threaded post and the threaded hole, thus ensuring that the installation cover is firmly fixed on the ball body and not easily loosened.

[0029] 5. By setting a fillet, stress can be effectively dispersed, avoiding stress concentration at the sharp edges of the seal, thereby reducing the risk of seal damage. At the same time, friction and wear are reduced, further extending the service life of the seal. Moreover, the design of the fillet can adapt to small installation errors, improving the stability and reliability of the seal.

[0030] 6. Since the thickness of the installation step is less than the thickness of the seal, when the installation cover is spirally arranged on the ball body, the installation cover can first contact the seal rather than the installation step, so that a certain pressing force can be provided to the seal by tightening the installation cover, making the installation of the seal more secure. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Attached Figure 1 is a structural diagram of the present utility model when closed;

[0032] Attached Figure 2 is Figure 1 an internal cross-sectional view of Attached

[0033] Attached Figure 3 is Figure 2 an enlarged schematic view of A in Attached

[0034] Attached Figure 4 is a front view of the present utility model when opened;

[0035] Attached Figure 5 is Figure 4 a cross-sectional schematic view of B - B in Attached

[0036] Attached Figure 6 is a structural diagram of the sphere;

[0037] Attached Figure 7 is a disassembled schematic view of the sphere;

[0038] Description of the reference numerals: 1. Valve body, 2. Inlet, 3. Outlet, 4. Sphere, 5. Ring groove, 6. Seal, 7. Ball body, 8. Installation cover, 9. Installation step, 10. Threaded post, 11. Threaded hole, 12. Fillet, 13. Lever groove, 14. Fluid passage, 15. Handle. Detailed implementation mode

[0039] The following will clearly describe the technical solutions in the embodiments of the present application in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application. In the description of the present application, it should be noted that the terms used here are only for describing specific implementation modes and are not intended to limit the exemplary implementation modes according to the present application. For the convenience of description, the dimensions of each part shown in the accompanying drawings are not drawn according to the actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0040] Embodiment 1:

[0041] This embodiment provides an upward-opening polyethylene ball valve, which includes a valve body 1 having an inlet 2 and an outlet 3. It is characterized in that it further includes:

[0042] A ball 4 rotatably arranged in the valve body 1 for opening and closing the valve body 1;

[0043] A ring groove 5 opened on the ball 4;

[0044] A seal 6 located in the ring groove 5 and moving with the ball 4, which is a radial shaft seal 6;

[0045] Wherein, when the valve body 1 is in the closed state, the seal 6 faces the inlet 2 of the valve body 1 and is sealingly connected to the valve body 1. When the valve body 1 is in the open state, the seal 6 does not contact the inside of the valve body 1.

[0046] In this technical solution, a fluid passage 14 is usually provided in the sphere 4. When the two ends of the fluid passage 14 correspond to the inlet 2 and the outlet 3 of the valve body 1 respectively, the valve body 1 is in an open state; a handle 15 for driving the sphere 4 to rotate is also provided on the valve body 1, which is fixedly connected to the sphere 4. Usually, by rotating the handle 15 by 90°, the sphere 4 can be rotated by 90°, so that the fluid passage 14 of the sphere 4 does not correspond to the inlet 2 and the outlet 3 of the valve body 1, but the outer surface of the sphere 4 corresponds to the inlet 2 and the outlet 3 of the valve body 1, and the outer surface of the sphere 4 is not provided with a fluid passage 14, making the valve body 1 in a closed state;

[0047] A ring groove 5 is provided on the sphere 4, and a seal 6 is provided on the ring groove 5. The seal 6 can be an O-ring, and the axes of the ring groove 5 and the seal 6 are arranged at an angle of 90° with the axis of the fluid passage 14.

[0048] Correspondingly, no valve seat is provided inside the valve body 1, but the seal 6 is provided on the sphere 4. After the sphere 4 rotates 90° to block the inlet 2 and the outlet 3 of the valve body 1, it drives the seal 6 to rotate towards the inlet 2 of the valve body 1, and then fits with the inlet 2 of the valve body 1 to seal the inlet 2 of the valve body 1 and prevent the fluid inside the inlet 2 from leaking. When the valve body 1 needs to be opened, the sphere 4 rotates 90° in the opposite direction, driving the fluid passage 14 of the sphere 4 to correspond to the inlet 2 and the outlet 3 of the valve body 1. At this time, the seal 6 will also rotate 90° towards the inside of the housing of the valve body 1, and the internal contour of the valve body 1 is designed such that the seal 6 does not contact the inside of the housing of the valve body 1 at this time;

[0049] When the sphere 4 turns from the closed state to the open state, the seal 6 gradually stops contacting the valve body 1;

[0050] Through this structural design, by providing a ring groove 5 on the sphere 4 and a seal 6 in the ring groove 5, when the valve body 1 is in the closed state, the seal 6 faces the inlet 2 of the valve body 1 and is sealingly connected to the valve body 1. When the valve body 1 is in the open state, the seal 6 does not contact the inside of the valve body 1, so that only when the valve body 1 needs to be closed, the seal 6 will move to contact the valve body 1 to seal the valve body 1, extending the service life of the seal 6 and making it not easy for the seal 6 to wear between the seal 6 and the valve body 1.

[0051] Embodiment 2:

[0052] This embodiment provides an upward-opening polyethylene ball valve, which has the following technical features in addition to the technical solution of the above embodiment.

[0053] Further, the sphere 4 includes:

[0054] A ball main body 7, on the outer surface of which a plane is provided;

[0055] Mounting cover 8;

[0056] A mounting assembly, the mounting cover 8 is arranged on the plane of the ball body 7 through the mounting assembly;

[0057] Wherein, the annular groove 5 is formed by the ball body 7 and the mounting cover 8.

[0058] Through this structural design, by dividing the sphere 4 into a ball body 7 and a mounting cover 8, and the mounting cover 8 can be detachably connected to the ball body 7 through the mounting assembly. If the seal 6 is made of an easily stretchable material, the seal 6 can be directly stretched and placed into the annular groove 5. If the seal 6 is made of a non-easily stretchable material, the seal 6 can be placed into the annular groove 5 by installing the detachable connection with the ball body 7, which is convenient for installing the seal 6 on the sphere 4. After the mounting cover 8 is mounted on the ball body 7, the annular groove 5 is formed between the mounting cover 8 and the plane of the sphere 4, which is convenient for adapting seals 6 of different materials.

[0059] Embodiment 3:

[0060] This embodiment provides an upward-opening polyethylene ball valve, which has the following technical features in addition to the technical solutions of the above embodiments.

[0061] Further, the mounting assembly includes:

[0062] A mounting step 9, which is fixedly arranged on the plane of the ball body 7;

[0063] A threaded post 10, and a threaded post 10 is fixedly arranged on the mounting step 9;

[0064] A threaded hole 11, and a threaded hole 11 matching the threaded post 10 is penetrated and opened on the mounting cover 8;

[0065] Wherein, the seal 6 is sleeved on the mounting step 9, the left side of the seal 6 abuts against the mounting cover 8, and the right side of the seal 6 abuts against the plane of the ball body 7.

[0066] In this technical solution, after the mounting cover 8 is mounted on the ball body 7 through the cooperation of the threaded post 10 and the threaded hole 11, the annular groove 5 is formed by the plane of the ball body 7, the outer ring of the mounting step 9 and the right side surface of the mounting cover 8. The inner ring of the sealing ring is sleeved on the outer ring of the mounting step 9. The left side of the seal 6 abuts against the mounting cover 8, and the right side of the seal 6 abuts against the plane of the ball body 7;

[0067] Through this structural design, by setting up the installation step 9, it is convenient to position the seal 6 when the seal 6 is placed through the cooperation between the outer ring of the installation step 9 and the inner ring of the seal 6, so that the position of the seal 6 is accurately placed. At the same time, the cooperation between the threaded column 10 and the threaded hole 11 facilitates the installation and disassembly between the ball body 7 and the installation cover 8.

[0068] If the overall installation of the sphere 4 is completed, since the threaded hole 11 is opened through, and the sphere main body and the mounting cover 8 are both made of PVC, after the mounting cover 8 is tightened on the sphere main body 7, hot-melt welding can be performed between the threaded column 10 and the threaded hole 11, thereby ensuring that the mounting cover 8 is firmly fixed on the sphere main body 7 and is not easy to loosen.

[0069] Embodiment 4:

[0070] This embodiment provides a top-opening polyethylene ball valve, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0071] Furthermore, the length of the threaded column 10 is smaller than the depth of the threaded hole 11 .

[0072] With this structural design, since the length of the threaded column 10 is less than the depth of the threaded hole 11, the mounting cover 8 is screwed onto the outer side of the ball body 7.

[0073] Embodiment 5:

[0074] This embodiment provides a top-opening polyethylene ball valve, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0075] Furthermore, the outer ring of the sealing member 6 has a rounded corner 12 .

[0076] Through this structural design, by setting the rounded corners 12, stress can be effectively dispersed to avoid stress concentration on the sharp edges of the seal 6, thereby reducing the risk of damage to the seal 6, while reducing friction and wear, and further extending the service life of the seal 6. In addition, the design of the rounded corners 12 can adapt to small installation errors and improve the stability and reliability of the seal 6.

[0077] Embodiment 6:

[0078] This embodiment provides a top-opening polyethylene ball valve, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0079] Furthermore, it also includes:

[0080] The breaking groove 13 is provided on the outer surface of the mounting cover 8 and is used for rotating the mounting cover 8 .

[0081] With this structural design, by providing the lever slot 13, when installing the mounting cover 8 on the ball body 7, the mounting cover 8 can be rotated by inserting a finger into the lever slot 13, making the installation of the mounting cover 8 more labor-saving and preventing the finger from slipping on the outer surface of the mounting cover 8.

[0082] Embodiment 7:

[0083] This embodiment provides an upward-opening polyethylene ball valve. In addition to including the technical solutions of the above embodiments, it also has the following technical features.

[0084] Furthermore, the thickness of the mounting step 9 is less than the thickness of the seal 6.

[0085] With this structural design, since the thickness of the mounting step 9 is less than the thickness of the seal 6, when the mounting cover 8 is spirally arranged on the ball body 7, the mounting cover 8 can first contact the seal 6 instead of the mounting step 9, so that a certain pressing force can be provided to the seal 6 by tightening the mounting cover 8, making the installation of the seal 6 more reliable.

[0086] The embodiments of the present application have been described above in conjunction with the accompanying drawings. Without conflict, the embodiments in the specification of the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them belong to the protection scope of the present application.

Claims

1. A top-opening polyethylene ball valve, comprising a valve body (1) having an inlet (2) and an outlet (3), characterized in that: Also includes: A ball (4) is rotatably disposed in the valve body (1) and is used to open and close the valve body (1); An annular groove (5) is provided on the spherical body (4); A sealing member (6) is located in the annular groove (5) and moves along with the ball (4); Wherein, when the valve body (1) is in a closed state, the sealing member (6) faces the inlet (2) of the valve body (1) and is sealedly connected to the valve body (1); when the valve body (1) is in an open state, the sealing member (6) does not contact the inside of the valve body (1).

2. A top-opening polyethylene ball valve according to claim 1, characterized in that: The sphere (4) comprises: The ball body (7) has a flat surface on its outer surface; Installing cover (8); An installation component, wherein the installation cover (8) is arranged on the plane of the ball body (7) through the installation component; The annular groove (5) is formed by a ball body (7) and a mounting cover (8).

3. A top-opening polyethylene ball valve according to claim 2, characterized in that: The installation assembly includes: A mounting step (9) which is fixedly arranged on the plane of the ball body (7); A threaded column (10), wherein the threaded column (10) is fixedly arranged on the mounting step (9); A threaded hole (11), wherein the mounting cover (8) is provided with a threaded hole (11) matching the threaded column (10); The sealing member (6) is sleeved on the mounting step (9), the left side of the sealing member (6) abuts against the mounting cover (8), and the right side of the sealing member (6) abuts against the plane of the ball body (7).

4. The top-opening polyethylene ball valve according to claim 3, characterized in that: The length of the threaded column (10) is smaller than the depth of the threaded hole (11).

5. The top-opening polyethylene ball valve according to claim 4, characterized in that: The outer ring of the sealing element (6) has a rounded corner (12).

6. The top-opening polyethylene ball valve according to claim 5, characterized in that: Also includes: The breaking groove (13) is provided on the outer surface of the mounting cover (8) and is used for rotating the mounting cover (8).

7. The top-opening polyethylene ball valve according to claim 6, characterized in that: The thickness of the installation step (9) is smaller than the thickness of the sealing element (6).

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