Ball valve sealing structure

Abstract

The utility model relates to the field of water valve sealing, in particular to a ball valve sealing structure which comprises a first sealing piece arranged on a water pipe and located at the joint of the water pipe and a valve body, a second sealing piece arranged on the water pipe and located at the joint of the water pipe and a valve element and a positioning piece used for positioning the second sealing piece. The second sealing piece is located between the positioning piece and the valve element, and the positioning piece is used for extruding the second sealing piece to abut against the valve element. The sealing structure has the effects of improving the sealing performance of the ball valve and improving the stability of the sealing structure.

Description

Technical Field

[0001] This application relates to the field of water valve seals, and particularly to a ball valve seal structure. Background Art

[0002] The dynamic seal mechanism is a core component of the water valve. The water valve realizes the on-off of the loop in the control system by cooperating with the switching of the valve core through the dynamic seal mechanism. The existing dynamic seal of the ball valve uses a spring and a plastic sealing ring, and the water pipe and the valve core are sealed through the spring and the sealing ring. During specific use, the sealing ring is prone to deformation under the influence of water pressure and spring force, and the sealing ring deviates from its original installation position, affecting the sealing effect of the ball valve; moreover, it is difficult to control the size between the sealing ring and the water pipe, and gaps or structural protrusions are likely to appear at the connection position, affecting the installation of the ball valve components. Utility Model Content

[0003] In order to improve the sealing performance of the ball valve and the stability of the seal structure, this application provides a ball valve seal structure.

[0004] A ball valve seal structure provided by this application adopts the following technical solutions:

[0005] A ball valve seal structure includes a first seal member disposed between the water pipe and the valve body, a second seal member having one side cooperating with the valve core, and a positioning member for positioning the second seal member. The second seal member is located between the positioning member and the valve core, and the positioning member is used to squeeze the second seal member against the valve core.

[0006] By adopting the above technical solutions, the first seal member is used to seal between the water pipe and the valve body, the second seal member is used to seal between the water pipe and the valve core, the positioning member is used to position the second seal member, and the positioning member is used to squeeze the second seal member against the valve core, improving the sealing effect between the second seal member and the water pipe and the valve core, and at the same time improving the stability of the second seal member.

[0007] Preferably, the first seal member includes a first sealing ring sleeved on the outer sidewall of the water pipe.

[0008] By adopting the above technical solutions, the first sealing ring surrounds the outer sidewall of the water pipe and fits with the sidewall of the water pipe, and the first sealing ring seals the gap between the water pipe and the valve body.

[0009] Preferably, the second seal member includes a dynamic sealing ring disposed in the water pipe and a second sealing ring disposed between the dynamic sealing ring and the inner wall of the water pipe.

[0010] By adopting the above technical solutions, the dynamic sealing ring forms the main seal of the water outlet loop by cooperating with the spherical surface of the water pipe and the valve core; the second sealing ring improves the sealing effect of the dynamic sealing ring.

[0011] Preferably, a positioning groove for positioning the second sealing ring is provided on the dynamic sealing ring, or a positioning groove for positioning the second sealing ring is provided on the inner side of the water pipe.

[0012] By adopting the above technical solution, the positioning groove is used to position the second sealing ring, improving the stability of the second sealing ring on the dynamic sealing ring.

[0013] Preferably, the positioning member includes an elastic member and a sealing bracket for supporting the second sealing member. One end of the elastic member abuts against the water pipe, and the other end of the elastic member abuts against the sealing bracket.

[0014] By adopting the above technical solution, one end of the elastic member abuts tightly against the plane of the water pipe, and the other end of the elastic member abuts tightly against the sealing bracket. The sealing bracket is used to balance the extrusion effect of the elastic member on the second sealing member, improving the stability of the second sealing member during the sealing process.

[0015] Preferably, the elastic member is a corrugated spring.

[0016] Preferably, the sealing bracket includes a connecting portion provided at one end of the dynamic sealing ring away from the valve core and a positioning portion provided on the connecting portion and surrounding the inner wall of the dynamic sealing ring.

[0017] By adopting the above technical solution, the connecting portion is used to balance the extrusion force of the elastic member on the dynamic sealing ring, and the positioning portion improves the installation stability of the dynamic sealing ring and the stability of the sealing state.

[0018] Preferably, the connecting portion is in a circular ring shape.

[0019] By adopting the above technical solution, the connecting portion being in a circular ring shape is used to fit the inner wall of the dynamic sealing ring, improving the connection and positioning effect of the connecting portion.

[0020] Preferably, the sealing bracket and the dynamic sealing ring are in interference fit.

[0021] Preferably, the material of the dynamic sealing ring is a wear-resistant elastic material, and the sealing bracket is a metal material.

[0022] In summary, the first sealing member seals between the water pipe and the valve body, forming a seal between the inside and outside of the water valve. The second sealing member seals the connection between the water pipe and the valve core. On the one hand, it seals the spherical surfaces of the valve core and the dynamic sealing ring, and on the other hand, it realizes the seal between the inlet of the water valve valve core and the water pipe. The positioning member is used to support the second sealing member, providing a supporting force for the second sealing member to advance towards the valve core, improving the sealing performance of the second sealing member, as well as the sealing stability of the second sealing member, extending the service life of the second sealing member, and slowing down the deformation of the second sealing member. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of a ball valve sealing structure of the present application;

[0024] Figure 2 is a schematic structural view of a ball valve sealing structure of the present application;

[0025] Figure 3 is a cross-sectional view of a ball valve sealing structure of the present application;

[0026] Figure 4 is a schematic structural view of a ball valve sealing structure of the present application;

[0027] Figure 5 is Figure 4 an enlarged view of A in

[0028] Explanation of reference numerals: 1, first sealing member; 11, first sealing ring; 2, second sealing member; 21, dynamic sealing ring; 22, second sealing ring; 3, positioning member; 31, elastic member; 32, sealing bracket; 321, connecting portion; 322, positioning portion; 4, positioning groove; 5, valve body; 6, valve core; 7, water pipe. Detailed implementation manners

[0029] The following further elaborates on the present application in conjunction with the attached Figures 1 - 5 drawings.

[0030] An embodiment of the present application discloses a ball valve sealing structure. Referring to Figure 1 and Figure 2 , the valve core 6 is installed in the valve body 5, the water pipe 7 is inserted into the valve body 5 and is communicated or not communicated with the valve core 6. A hole for the water pipe 7 to be inserted into is provided on the valve body 5, and the outer side wall of the inserted end of the water pipe 7 is in close contact with the inner wall of the hole of the valve body 5. The ball valve sealing structure of the present application is used to improve the sealing performance between the water pipe 7, the valve body 5 and the valve core 6. The ball valve sealing structure includes a first sealing member 1 provided outside the water pipe 7, a second sealing member 2 inside the water pipe 7 and a positioning member 3. The first sealing member 1 is located at the connection between the water pipe 7 and the valve body 5. A groove for the first sealing member 1 to be embedded is provided on the outer side wall of the water pipe 7, or a limiting structure is provided on the outer side of the water pipe 7 to limit the first sealing member 1, or a limiting structure is provided on the inner side of the valve body 5 to limit the first sealing member 1. The first sealing member 1 includes a first sealing ring 11 sleeved on the outer side wall of the water pipe 7, and the first sealing ring 11 is located in the groove or is limited by the limiting structure. In the embodiment of the present application, the first sealing ring 11 is an O-ring, which has good sealing effect and low cost. After the first sealing ring 11 is installed in the groove, the side of the first sealing ring 11 facing the valve body 5 is in close contact with the valve body 5, and the side wall of the first sealing ring 11 located in the groove is in close contact with the water pipe 7. The first sealing ring 11 seals the connection between the water pipe 7 and the valve body 5, improving the sealing effect between the water pipe 7 and the valve body 5.

[0031] Referring to Figure 2 and Figure 3, the second seal 2 is at least partially located inside the water pipe 7. The second seal 2 includes a dynamic seal ring 21 disposed inside the water pipe 7 and surrounding the inner wall of the water pipe 7, and a second sealing ring 22 installed between the dynamic seal ring 21 and the inner wall of the water pipe 7. A positioning groove 4 is formed on one side of the dynamic seal ring 21 close to the inner wall of the water pipe 7. The second sealing ring 22 is located in the positioning groove 4. One side of the second sealing ring 22 facing the water pipe 7 is in close contact with the inner wall of the water pipe 7, and one side of the second sealing ring 22 facing the dynamic seal ring 21 is in close contact with the dynamic seal ring 21, realizing the seal between the inner wall of the water pipe 7 and the dynamic seal ring 21, and reducing the leakage of the medium through the gap between the outer sides of the dynamic seal ring 21 of the water pipe 7. In addition, the limiting component of the second sealing ring 22 can also be arranged inside the water pipe 7 to realize the limitation of the second sealing ring 22, so as to seal the gap between the inner wall of the water pipe 7 and the outer side of the dynamic seal ring 21. The dynamic seal ring 21 functions to seal the connection position between the water pipe 7 and the valve core 6, and the extrusion of the dynamic seal ring 21 on the second sealing ring 22 also improves the installation stability of the second sealing ring 22. In the embodiment of the present application, the sealing structure is used to seal the connection gap between the ball valve and the water pipe 7. One side of the dynamic seal ring 21 facing the valve core 6 is arranged to fit along the spherical surface of the connection end of the valve core 6, that is, the spherical surface size of the surface of one side of the dynamic seal ring 21 facing the valve core 6 is the same as the spherical diameter of the corresponding valve core 6, so that the spherical surfaces of the dynamic seal ring 21 and the valve core 6 are well matched, improving the sealing effect of the dynamic seal ring 21. In the specific implementation process, the shape of one side of the dynamic seal ring 21 facing the valve core 6 is set according to the shape of the outer wall of the valve core 6. In the embodiment of the present application, the dynamic seal ring 21 is made of wear-resistant elastic material, preferably PTFE material or PFA material, with good wear resistance and durability.

[0032] Refer to Figure 3 and Figure 4, the positioning member 3 fixes the dynamic seal ring 21 and provides a continuous force acting on the dynamic seal ring 21 towards the valve core 6. The positioning member 3 improves the sealing stability of the second seal member 2 and improves the dynamic sealing performance between the dynamic seal ring 21 and the valve core 6. The inner wall of one end of the water pipe 7 facing the valve core 6 is provided with a stepped portion for installing the positioning member 3 and the second seal member 2, or a separate limiting member is arranged in the water pipe 7 to realize the limit on the side of the positioning member 3 away from the valve core 6. The positioning member 3 includes an elastic member 31 and a seal bracket 32. The second seal member 2 is located at one end of the positioning member 3 close to the valve core 6. The seal bracket 32 is located on the side close to the valve core 6. The elastic member 31 is located on the side away from the valve core 6. The seal bracket 32 is located between the dynamic seal ring 21 and the elastic member 31. One end of the elastic member 31 abuts against the water pipe 7, and the other end of the elastic member 31 abuts against the seal bracket 32. The dynamic seal ring 21 and the seal bracket 32 are in interference fit. The elastic member 31 is a corrugated spring. One end of the corrugated spring abuts against the plane of the water pipe 7, and the other end abuts against the seal bracket 32. The acting force is provided to the seal bracket 32 through the compression of the corrugated spring. The seal bracket 32 makes the spring force act evenly on the dynamic seal ring 21, improves the sealing performance between the dynamic seal ring 21 and the valve core 6, and the seal bracket 32 reduces the deformation of the dynamic seal ring 21 affected by external forces.

[0033] Refer to Figure 4 and Figure 5 , the seal bracket 32 includes a connecting portion 321 and a positioning portion 322 arranged on the connecting portion 321. The connecting portion 321 is located at one end of the dynamic seal ring 21 away from the valve core 6. The end of the elastic member 31 is connected to the connecting portion 321. The connecting portion 321 is circular for better fitting with the dynamic seal ring 21. The positioning portion 322 is arranged along the inner wall of the dynamic seal ring 21. In the embodiment of the present application, the connecting portion 321 and the positioning portion 322 are integrally formed. The seal bracket 32 is made of metal, and the metal has good strength, which can better position and support the dynamic seal ring 21 and reduce deformation.

[0034] In the present application, the first seal member 1 improves the sealing performance between the water pipe 7 and the valve body 5 to form the seal between the inside and the outside of the water valve; the second seal member 2 improves the sealing performance between the water pipe 7 and the valve core 6 to form the side seal of the water valve inlet and the water pipe 7 return circuit; the elastic member 31 provides an elastic compression force for the seal bracket 32, so that the dynamic seal ring 21 and the seal bracket 32 are in interference fit. The seal bracket 32 balances the spring force of the elastic member 31, reduces the possibility of deformation of the dynamic seal ring 21 affected by external forces, and improves the stability of the dynamic seal ring 21.

[0035] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A ball valve sealing structure, characterized in that: The invention comprises a sealing member 1 (1) arranged between a water pipe (7) and a valve body (5), a sealing member 2 (2) whose one side cooperates with a valve core (6), and a positioning member (3) used for positioning the sealing member 2 (2); the sealing member 2 (2) is located between the positioning member (3) and the valve core (6); the positioning member (3) is used for pressing the sealing member 2 (2) against the valve core (6).

2. A ball valve sealing structure according to claim 1, characterized in that: The sealing member 1 (1) comprises a sealing ring 1 (11) which is sleeved on the outer side wall of the water pipe (7).

3. A ball valve sealing structure according to claim 1, characterized in that: The second sealing member (2) comprises a dynamic sealing ring (21) arranged in the water pipe (7) and a second sealing ring (22) arranged between the dynamic sealing ring (21) and the inner wall of the water pipe (7).

4. A ball valve sealing structure according to claim 3, characterized in that: The dynamic sealing ring (21) is provided with a positioning groove (4) for positioning the second sealing ring (22), or the inner side of the water pipe (7) is provided with a positioning groove (4) for positioning the second sealing ring (22).

5. A ball valve sealing structure according to claim 3, characterized in that: The positioning member (3) comprises an elastic member (31) and a sealing bracket (32) for supporting the second sealing member (2); one end of the elastic member (31) abuts against the water pipe (7), and the other end of the elastic member (31) abuts against the sealing bracket (32).

6. A ball valve sealing structure according to claim 5, characterized in that: The elastic member (31) is a wave spring.

7. A ball valve sealing structure according to claim 5, characterized in that: The sealing bracket (32) comprises a connecting portion (321) arranged at one end of the dynamic sealing ring (21) away from the valve core (6) and a positioning portion (322) arranged on the connecting portion (321) and arranged along the inner wall of the dynamic sealing ring (21).

8. A ball valve sealing structure according to claim 7, characterized in that: The connecting portion (321) is in a circular ring shape.

9. A ball valve sealing structure according to claim 5, characterized in that: The sealing bracket (32) and the dynamic sealing ring (21) are interference fit.

10. A ball valve sealing structure according to claim 5, characterized in that: The dynamic sealing ring (21) is made of a wear-resistant elastic material, and the sealing bracket (32) is made of a metal material.

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