Valve sealing ring

Abstract

The utility model provides a valve sealing ring which comprises an annular base body, and the center line of the annular base body is configured to be a first datum line. Two valve shaft mounting holes are formed in the annular base body in the radial direction of the annular base body and penetrate through the annular base body, the center lines of the two valve shaft mounting holes coincide, the center line where the valve shaft mounting holes are located is a second datum line, and the second datum line is perpendicular to the first datum line; two wear-resistant parts are arranged on the inner circular surface of the annular base body in a central symmetry manner relative to a second reference line; in any wear-resisting part, the two ends of the wear-resisting part respectively extend to the two valve shaft mounting holes; the central axis, perpendicular to the second datum line, of the annular base body is configured to be a third datum line in the radial direction of the annular base body; and the thickness of at least part of the wear-resistant part is gradually increased from one end to the third datum line. The problem of valve water seepage caused by gradual abrasion of the inner surface of the sealing ring is solved.

Description

Technical Field

[0001] The utility model relates to a valve accessory, in particular to a valve sealing ring. Background Art

[0002] In the valve, the sealing ring arranged on the inner circle of the valve body is used to seal the valve plate when the valve is closed. As the number of times the valve is opened and closed increases, the inner surface of the sealing ring gradually wears, resulting in an increased probability of water leakage in the valve. Summary of the invention

[0003] In view of the shortcomings of the prior art, the utility model provides a valve sealing ring, which improves the structure of the sealing ring body and adds a wear-resistant part with a variable thickness. When the valve plate is not tightly sealed, the sealing of the sealing ring is ensured by increasing the valve plate feed amount, thereby effectively extending the life of the valve. The technical solution adopted by the utility model is:

[0004] A valve sealing ring comprises an annular base, wherein the center line of the annular base is configured as a first reference line;

[0005] Two valve shaft mounting holes are arranged radially along the annular base and penetrate the annular base, the center lines of the two valve shaft mounting holes coincide with each other, the center line where the valve shaft mounting holes are located is a second reference line, and the second reference line is perpendicular to the first reference line;

[0006] The inner circular surface of the annular base is provided with two wear-resistant parts in a centrally symmetrical manner relative to the second reference line;

[0007] In any of the wear-resistant parts, both ends of the wear-resistant part extend to the two valve shaft mounting holes respectively;

[0008] Along the radial direction of the annular base, the central axis of the annular base perpendicular to the second reference line is configured as a third reference line;

[0009] The thickness of at least a portion of the wear-resistant portion gradually increases from one end thereof toward the third reference line.

[0010] Further, the wear-resistant portion includes a first wear-resistant segment, one end of the first wear-resistant segment is connected to the inner surface of the annular base, and the other end of the first wear-resistant segment extends toward the third reference line;

[0011] The thickness of the first wear-resistant section gradually increases from one end thereof to the other end thereof.

[0012] Further, the wear-resistant portion includes a first wear-resistant section and a second wear-resistant section connected to each other;

[0013] One end of the first wear-resistant section is connected to the inner surface of the annular base, and the other end of the first wear-resistant section extends toward the third reference line;

[0014] One end of the second wear-resistant section is connected to the inner surface of the annular base, and the other end of the second wear-resistant section extends toward the third reference line;

[0015] The thickness of the first wear-resistant section gradually increases from one end thereof to the other end thereof;

[0016] The thickness of the second wear-resistant section gradually increases from one end thereof to the other end thereof.

[0017] Further, the wear-resistant portion includes a first wear-resistant segment, a third wear-resistant segment and a second wear-resistant segment connected to each other;

[0018] One end of the first wear-resistant segment is connected to the inner surface of the annular base, and the other end of the first wear-resistant segment is connected to one end of the third wear-resistant segment;

[0019] One end of the second wear-resistant segment is connected to the inner surface of the annular base, and the other end of the second wear-resistant segment is connected to the other end of the third wear-resistant segment;

[0020] The thickness of the first wear-resistant section gradually increases from one end thereof to the other end thereof;

[0021] The thickness of the second wear-resistant section gradually increases from one end thereof to the other end thereof;

[0022] The thickness of the third wear-resistant section along the first reference line remains unchanged.

[0023] Further, the edge of the first wear-resistant section and the edge of the second wear-resistant section are arc-shaped respectively;

[0024] The closer to the third reference line, the smaller the change in the curvature radius of the edge of the first wear-resistant segment is than the change in the curvature radius of the edge of the second wear-resistant segment.

[0025] Furthermore, an annular base reinforcement portion is provided on the outer circumferential surface of the annular base, and the valve shaft mounting hole passes through the base reinforcement portion.

[0026] Furthermore, the base reinforcement portion is axially symmetrical with respect to the second reference line.

[0027] Furthermore, two axial ends of the annular base are respectively provided with base bending portions, and the base bending portions are bent toward a side away from the first reference line.

[0028] Furthermore, a hole edge reinforcement portion is provided on the inner circumferential surface of the annular base and on the outer periphery of the valve shaft mounting hole, and one end of the wear-resistant portion is connected to the hole edge reinforcement portion.

[0029] Furthermore, an in-hole protrusion is provided on the annular base and in the valve shaft mounting hole; and / or an embedded part is provided in the valve shaft mounting hole.

[0030] Advantages of the utility model:

[0031] The wear-resistant part with variable thickness is used as the butt joint surface when the valve plate rotates. As the feed amount of the valve plate increases, the thickness of the corresponding wear-resistant part also increases. When leakage occurs, the valve plate can be further rotated to ensure the sealing of the valve body, effectively extending the service life of the valve;

[0032] By adding the base reinforcement part to increase the thickness of the annular base, the sealing ring is matched with the corresponding inner concave part on the valve body, the position of the sealing ring is limited, and the installation of the sealing ring is convenient;

[0033] The hole edge reinforcement portion is provided to improve the structural strength of the annular base at the hole edge reinforcement portion, reduce the deformation of the valve shaft installation hole caused by squeezing the annular base during valve shaft installation, and further prevent the medium from leaking from the valve shaft installation hole;

[0034] By providing a protrusion in the hole, the sealing performance of the valve shaft circumference is further increased when the valve shaft mounting hole matches the valve shaft;

[0035] By arranging the embedded parts, the valve plate can support the valve shaft installation hole when squeezing the sealing ring, thereby improving the structural strength and reducing leakage accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a three-dimensional diagram of the sealing ring body.

[0037] Figure 2 It is a plan view of the sealing ring body.

[0038] Figure 3 It is the axial cross-section view of the sealing ring body along AA.

[0039] Figure 4 It is the BB axial cross-section of the sealing ring body.

[0040] Figure 5 This is a schematic structural diagram of the wear-resistant portion and the annular base in the first embodiment of the present application.

[0041] Figure 6 This is a schematic structural diagram of the wear-resistant portion and the annular base in the second embodiment of the present application.

[0042] Figure 7 This is a schematic structural diagram of the wear-resistant portion and the annular base in the third embodiment of the present application.

[0043] Figure 8 for Figure 4 Enlarged view of point D.

[0044] Fig. 9 for Figure 3 Enlarged view of point C.

[0045] In the figure: 100-sealing ring, 110-annular base, 111-base reinforcement portion, 112-base bending portion, 120-valve shaft mounting hole, 121-hole edge extreme strength portion, 122-protrusion in the hole, 130-wear-resistant portion, 131-first wear-resistant section, 132-second wear-resistant section, 133-third wear-resistant section, 200-embedded part. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0047] Please see attached Figure 1-Figure 4 The utility model provides a valve sealing ring 100, comprising an annular base 110, wherein the center line of the annular base 110 is configured as a first reference line; two valve shaft mounting holes 120 are arranged along the radial direction of the annular base 110 and penetrate the annular base 110, the center lines of the two valve shaft mounting holes 120 coincide, the center line of the valve shaft mounting holes 120 is located as a second reference line, and the second reference line is perpendicular to the first reference line; two wear-resistant parts 130 are arranged on the inner circular surface of the annular base 110 in a centrally symmetrical manner relative to the second reference line; in any one of the wear-resistant parts 130, the two ends of the wear-resistant part 130 extend to the two valve shaft mounting holes 120 respectively; along the radial direction of the annular base 110, the central axis of the annular base 110 perpendicular to the second reference line is configured as a third reference line; the thickness of at least part of the wear-resistant part 130 gradually increases from one end thereof to the third reference line.

[0048] As attached Figure 2 and Figure 3 As shown, it can be seen from the AA axial section of the sealing ring 100 that the valve shaft mounting hole 120 and the annular base 110 are symmetrical relative to the second reference line, that is, the valve shaft mounting hole 120 is opened in the middle position of the annular base 110, so that the weight, force and deformation of the annular base 110 on both sides of the second reference line are equivalent, and the structure of the sealing ring 100 is more stable.

[0049] It should be noted that the Figure 3 and Figure 4 The direction in is described as a reference, and the two wear-resistant parts 130 are centrally symmetrical rather than axially symmetrical relative to the second reference line. The purpose is that according to the valve opening and closing process, the valve plate and the valve shaft rotate around the second reference line, so when the valve is closed, the valve plate contacts the front end of one of the wear-resistant parts 130 and the rear end of the other wear-resistant part 130 respectively, thereby achieving sealing of the entire circumference of the valve plate until the valve is closed.

[0050] Due to the restriction of the partial structure of the wear-resistant part 130, the thickness of the wear-resistant part 130 gradually increases from one end thereof to the third reference line. According to the central symmetry of the two wear-resistant parts 130 relative to the second reference line, it can be known that in the initial use stage, the sealing performance of the sealing ring is good, and the valve is closed when the valve plate rotates to just contact the wear-resistant part 130. At this time, the thickness of the wear-resistant part 130 that the valve plate contacts is small. As the wear-resistant part 130 with a small thickness gradually wears away, the thickness of the wear-resistant part further decreases after wear, resulting in a gap between the wear-resistant part 130 and the valve plate. The gap will cause the risk of leakage. At this time, as long as the feed amount of the valve plate is increased, the thickness of the wear-resistant part 130 is increased to make up for the original gap, the valve can be re-sealed to avoid valve leakage, thereby effectively extending the service life of the valve and reducing the number of disassembly and replacement of parts.

[0051] As the first and second embodiments of the present application, as shown in the attached Figure 5 and Figure 6 As shown, the wear-resistant portion 130 includes a first wear-resistant segment 131, one end of the first wear-resistant segment 131 is connected to the inner surface of the annular base 110, and the other end of the first wear-resistant segment 131 extends toward the third reference line; the thickness of the first wear-resistant segment 131 gradually increases from one end to the other end.

[0052] First, only the first wear-resistant section 131 is needed to realize the gradual sealing function of the sealing ring, and the thickest part of the first wear-resistant section 131 does not need to exceed the third reference line. Figure 4 , Figure 5 , Figure 6 Taking the direction in as the reference, the thickness of the first wear-resistant section 131 along the first reference line gradually increases from bottom to top; after the valve plate rotates clockwise with the second reference line as the axis until it contacts the thinnest point (i.e. the top) of the first wear-resistant section 131, the feed amount of the valve plate can be adjusted by continuing to rotate the valve plate clockwise until the valve is completely closed; when the valve plate is rotated counterclockwise, the valve plate gradually separates from the first wear-resistant section 131, and the valve gradually opens; however, it should be noted that when the valve plate rotates counterclockwise to contact the thickest point (i.e. the top) of the first wear-resistant section 131, the first wear-resistant section 131 blocks the valve plate, making it impossible for the valve plate to pass over the first wear-resistant section 131, indicating that the valve can only be opened in one direction counterclockwise.

[0053] In some specific cases, the edge shape of the first wear-resistant segment 131 is a straight line (not shown), that is, the cross-sectional shape of the first wear-resistant segment 131 in the second axial section of the sealing ring 100 is a triangle; or, the edge shape of the first wear-resistant segment 131 is a curve.

[0054] As the third embodiment of the present application, as shown in the attached Figure 7As shown, the wear-resistant portion 130 includes a first wear-resistant section 131 and a second wear-resistant section 132 that are connected; one end of the first wear-resistant section 131 is connected to the inner surface of the annular base 110, and the other end of the first wear-resistant section 131 extends to the third reference line; one end of the second wear-resistant section 132 is connected to the inner surface of the annular base 110, and the other end of the second wear-resistant section 132 extends to the third reference line; the thickness of the first wear-resistant section 131 gradually increases from one end thereof to the other end thereof; the thickness of the second wear-resistant section 132 gradually increases from one end thereof to the other end thereof.

[0055] In the third embodiment, the wear-resistant portion 130 is provided with a second wear-resistant segment 132 on the basis of the first wear-resistant segment 131; by providing the second wear-resistant segment 132, the weight of the wear-resistant portion 130 on both sides of the third reference line is firstly balanced, and secondly, the second wear-resistant segment 132 buffers the rotation of the valve plate when the valve is open, thereby preventing the valve plate from directly hitting the first wear-resistant segment 131 and causing its deformation, and also improves the structural strength of the wear-resistant portion 130 as a whole.

[0056] In some specific cases, the edge shape of the second wear-resistant segment 132 is straight or curved;

[0057] Preferably, the edge of the first wear-resistant section 131 and the edge of the second wear-resistant section 132 are arc-shaped; the closer to the third reference line, the change in the radius of curvature of the edge of the first wear-resistant section 131 is smaller than the change in the radius of curvature of the edge of the second wear-resistant section 132. By setting the edge curvature of the first wear-resistant section 131 to be smaller than the radius of curvature of the second wear-resistant section 132, the angle through which the valve plate can rotate clockwise is greater than the angle through which it can rotate counterclockwise, which has a steering restriction effect on the valve plate, so that the valve plate can only be opened in one direction counterclockwise.

[0058] It should be noted that, in the third embodiment, the connection between the first wear-resistant segment 131 and the second wear-resistant segment 132 (ie, the location where the thickness of the entire wear-resistant portion is the largest) is not necessarily located on the third reference line.

[0059] As the fourth embodiment of the present application, as shown in the attached Figure 8 As shown, the wear-resistant portion 130 includes a first wear-resistant segment 131, a third wear-resistant segment 133 and a second wear-resistant segment 132 that are connected to each other; one end of the first wear-resistant segment 131 is connected to the inner surface of the annular base 110, and the other end of the first wear-resistant segment 131 is connected to one end of the third wear-resistant segment 133; one end of the second wear-resistant segment 132 is connected to the inner surface of the annular base 110, and the other end of the second wear-resistant segment 132 is connected to the other end of the third wear-resistant segment 133; the thickness of the first wear-resistant segment 131 gradually increases from one end thereof to the other end thereof; the thickness of the second wear-resistant segment 132 gradually increases from one end thereof to the other end thereof; along the first reference line, the thickness of the third wear-resistant segment 133 remains unchanged.

[0060] In the fourth embodiment, a third wear-resistant section 133 with a constant thickness is added between the first wear-resistant section 131 and the second wear-resistant section 132. The maximum feed amount of the valve plate is limited by adding the third wear-resistant section 133. When the valve plate is fed to the limit position and contacts the third wear-resistant section 133, it indicates that the service life of the sealing ring 100 is close to the limit and replacement of parts is required.

[0061] It should be noted that, in the BB axis section, the first wear-resistant section 131 and the second wear-resistant section 132 do not exceed the third reference line, thereby ensuring the center of gravity of the sealing ring 100 as a whole and balancing its force.

[0062] In some specific cases, the edge of the first wear-resistant segment 131 and the edge of the second wear-resistant segment 132 are arc-shaped; the closer to the third reference line, the smaller the change in the curvature radius of the edge of the first wear-resistant segment 131 is than the change in the curvature radius of the edge of the second wear-resistant segment 132 .

[0063] According to the valve design standard, the valve opening and closing is required to close clockwise and open counterclockwise, so the attached Figure 8 The position relationship in is taken as a reference, preferably the first wear-resistant section 131 is at the bottom and the second wear-resistant section 132 is at the top. When the first wear-resistant section 131 is at the top and the second wear-resistant section 132 is at the bottom, it means that the valve can only be opened clockwise and counterclockwise.

[0064] In this application, if attached Fig. 9 As shown, an annular base reinforcement portion 111 is provided on the outer circumferential surface of the annular base 110, and the valve shaft mounting hole 120 passes through the base reinforcement portion 111; the base reinforcement portion 111 can match the recess on the inner surface of the valve body, and is used to fix the sealing ring 100 on the valve body, while strengthening the structural strength of the middle part of the annular base 110, and reducing the deformation of the sealing ring caused by assembling the valve shaft.

[0065] As a preference of the present application, the base reinforcement portion 111 is axisymmetric relative to the second reference line.

[0066] In this application, Fig. 9 As shown, the annular base 110 is provided with a base bending portion 112 at both axial ends, and the base bending portion 112 is bent to a side away from the first reference line; the base bending portion 112 is used to cover the two side surfaces of the valve body and cooperate with the base reinforcement portion 111 to fix the sealing ring 100.

[0067] For further information, please see the attached Fig. 9An in-hole protrusion 122 is provided on the annular base 110 and in the valve shaft mounting hole 120 ; the in-hole protrusion 122 is used to closely contact the cylindrical surface of the valve shaft, thereby reducing the probability of liquid leakage at the valve shaft mounting hole 120 .

[0068] In addition, please see the attached Fig. 9 An embedded part 200 is arranged in the valve shaft mounting hole 120; the embedded part 200 is vulcanized in the sealing ring 100, and the valve shaft passes through the embedded part 200 when installing; by arranging the embedded part 200, the valve plate squeezes the sealing ring 100 to support the sealing ring 100, thereby reducing the deformation of the sealing ring; the embedded part is preferably a metal part.

[0069] For further information, please see the attached Figure 4 A hole edge reinforcement portion 121 is provided on the inner circumferential surface of the annular base 110 and the outer periphery of the valve shaft mounting hole 120 , and one end of the wear-resistant portion 130 is connected to the hole edge reinforcement portion 121 .

[0070] In summary, the present application improves the structure of the sealing ring body, adds a wear-resistant portion with varying thickness, and ensures the sealing of the sealing ring by increasing the valve plate feed amount when the valve plate is not tightly sealed, thereby effectively extending the life of the valve.

[0071] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to examples, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A valve sealing ring (100), characterized in that: It comprises an annular base (110), wherein the center line of the annular base (110) is configured as a first reference line; Two valve shaft mounting holes (120) are arranged radially along the annular base (110) and penetrate the annular base (110), the center lines of the two valve shaft mounting holes (120) coincide with each other, the center line of the valve shaft mounting holes (120) is a second reference line, and the second reference line is perpendicular to the first reference line; The inner circular surface of the annular base (110) is provided with two wear-resistant parts (130) in a centrally symmetrical manner relative to the second reference line; In any one of the wear-resistant parts (130), two ends of the wear-resistant part (130) extend to the two valve shaft mounting holes (120) respectively; Along the radial direction of the annular base (110), a central axis of the annular base (110) perpendicular to the second reference line is configured as a third reference line; The thickness of at least part of the wear-resistant portion (130) gradually increases from one end thereof toward the third reference line.

2. The valve sealing ring according to claim 1, characterized in that: The wear-resistant portion (130) comprises a first wear-resistant section (131), one end of the first wear-resistant section (131) is connected to the inner surface of the annular base (110), and the other end of the first wear-resistant section (131) extends towards a third reference line; The thickness of the first wear-resistant section (131) gradually increases from one end thereof to the other end thereof.

3. The valve sealing ring according to claim 1, characterized in that: The wear-resistant portion (130) comprises a first wear-resistant section (131) and a second wear-resistant section (132) connected to each other; One end of the first wear-resistant section (131) is connected to the inner surface of the annular base (110), and the other end of the first wear-resistant section (131) extends toward a third reference line; One end of the second wear-resistant section (132) is connected to the inner surface of the annular base (110), and the other end of the second wear-resistant section (132) extends toward a third reference line; The thickness of the first wear-resistant section (131) gradually increases from one end thereof to the other end thereof; The thickness of the second wear-resistant section (132) gradually increases from one end thereof to the other end thereof.

4. The valve sealing ring according to claim 1, characterized in that: The wear-resistant portion (130) comprises a first wear-resistant segment (131), a third wear-resistant segment (133) and a second wear-resistant segment (132) which are connected; One end of the first wear-resistant section (131) is connected to the inner surface of the annular base (110), and the other end of the first wear-resistant section (131) is connected to one end of the third wear-resistant section (133); One end of the second wear-resistant section (132) is connected to the inner surface of the annular base (110), and the other end of the second wear-resistant section (132) is connected to the other end of the third wear-resistant section (133); The thickness of the first wear-resistant section (131) gradually increases from one end thereof to the other end thereof; The thickness of the second wear-resistant section (132) gradually increases from one end thereof to the other end thereof; Along the first reference line, the thickness of the third wear-resistant section (133) remains unchanged.

5. The valve sealing ring according to claim 3 or 4, characterized in that: The edge of the first wear-resistant section (131) and the edge of the second wear-resistant section (132) are respectively arc-shaped; The closer to the third reference line, the smaller the change in the curvature radius of the edge of the first wear-resistant section (131) is than the change in the curvature radius of the edge of the second wear-resistant section (132).

6. The valve sealing ring according to any one of claims 1 to 4, characterized in that: An annular base reinforcement portion (111) is provided on the outer circumferential surface of the annular base (110), and the valve shaft mounting hole (120) passes through the base reinforcement portion (111).

7. The valve sealing ring according to claim 6, characterized in that: The base reinforcement portion (111) is axially symmetrical relative to the second reference line.

8. The valve sealing ring according to any one of claims 1 to 4, characterized in that: A base body bending portion (112) is respectively provided at two axial ends of the annular base body (110), and the base body bending portion (112) is bent towards a side away from the first reference line.

9. The valve sealing ring according to any one of claims 1 to 4, characterized in that: A hole edge reinforcement portion (121) is provided on the inner circumferential surface of the annular base (110) and on the outer periphery of the valve shaft mounting hole (120), and one end of the wear-resistant portion (130) is connected to the hole edge reinforcement portion (121).

10. The valve sealing ring according to any one of claims 1 to 4, characterized in that: An in-hole protrusion (122) is provided on the annular base (110) and in the valve shaft mounting hole (120); and / or an embedded part (200) is provided in the valve shaft mounting hole (120).

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