Wear-resistant ring and piston assembly

Abstract

According to the wear-resisting ring and the piston assembly, the outer wall of the circular ring body is provided with the outward protrusion, the outward protrusion extends towards the side away from the circular ring body, the circular ring body which is originally in surface contact with a matching surface is changed into the outward protrusion which is in line contact with the matching surface, and therefore the response time is shortened, and the service life of the piston assembly is prolonged. The service life is prolonged; the sealing ring further comprises inward protrusions, the containing space used for containing the sealing component is defined by the circular ring body and the two inward protrusions, so that the sealing component can be stably matched with the circular ring body, and under the structure, the sealing component can provide outward acting force for the circular ring body and the outward protrusions on the basis of playing a sealing role. When the outward protrusion is slightly abraded after being used for a period of time, acting force provided by the sealing component can enable the outward protrusion to continue to abut against the matching face, the abrasion-resistant ring can continue to keep the sealing effect, and then the service life of the abrasion-resistant ring and the service life of the piston assembly are prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid valves, and particularly relates to a wear-resistant ring and a piston assembly. Background Art

[0002] A piston assembly refers to a fluid valve composed of components such as a piston valve body and a piston valve core; during use, the piston valve core moves within the piston valve body to control the on-off of gas or liquid.

[0003] Since relative movement is required between the piston valve body and the piston valve core, in the prior art, a wear-resistant ring is usually provided on the outer wall of the piston valve core, so that the outer wall of the wear-resistant ring contacts the inner wall of the piston valve body. Here, the wear-resistant ring can play a sealing role and reduce the wear between the piston valve body and the piston valve core; however, the contact surface between the existing wear-resistant ring and the inner wall of the piston valve body is generally a straight surface, so that the outer wall of the wear-resistant ring forms a surface contact with the inner wall of the piston valve body. This straight surface structure will cause the friction between the wear-resistant ring and the piston valve body to be too large when the new piston assembly is first put into use, and the response time between the piston valve body and the piston valve core is too long. After the old piston assembly is used for a period of time, the wear between the wear-resistant ring and the piston valve body is serious, resulting in the failure of the sealing function of the wear-resistant ring, thereby affecting the service life of the wear-resistant ring and the piston assembly. Summary of the Utility Model

[0004] The problem to be solved by the utility model is to provide a wear-resistant ring with a shorter response time and a longer service life, and a piston assembly with such a wear-resistant ring.

[0005] The technical solution adopted by the utility model to solve the above problems is: a wear-resistant ring, comprising:

[0006] A circular ring body;

[0007] An outward protrusion, wherein the outward protrusion is arranged on the outer wall of the circular ring body; the outward protrusion is arranged to extend towards the side away from the circular ring body; and

[0008] An inward protrusion, wherein the inward protrusion is arranged at both ends of the circular ring body; the inward protrusion extends from the inner wall of the circular ring body towards the center of the circular ring body, so as to enclose an accommodation space for accommodating a sealing component through the circular ring body and the two inward protrusions; the sealing component applies an elastic force to the inner wall of the circular ring body, so that the outward protrusion forms a line contact with the mating surface.

[0009] Compared with the prior art, the utility model is provided with an outward protrusion on the outer wall of the ring body, and the outward protrusion extends towards the side away from the ring body, so that the ring body that originally formed a surface contact with the mating surface becomes an outward protrusion that forms a line contact with the mating surface. Thus, on the basis of ensuring the sealing effect, the response time is shortened, and the friction between the ring body and the mating surface is reduced, so that the service lives of both are extended. It also includes an inward protrusion, and the ring body and the two inward protrusions enclose a receiving space for receiving the sealing component, so that the sealing component can be stably matched with the ring body. In this structure, on the basis of playing a sealing role, the sealing component can also provide an outward acting force to the ring body and the outward protrusion, so that the outward protrusion can abut against the mating surface. When the outward protrusion is slightly worn after being used for a period of time, the acting force provided by the sealing component can enable the outward protrusion to continue to abut against the mating surface, so that the wear-resistant ring can continue to maintain the sealing effect, thereby improving the service lives of the wear-resistant ring and the piston assembly.

[0010] For a wear-resistant ring of the utility model, wherein the outward protrusion is arranged to extend from one end to the other end of the outer wall of the ring body; the outer side surface of the outward protrusion is arranged as an arc surface, and the outermost end of the arc surface forms a line contact with the mating surface.

[0011] For a wear-resistant ring of the utility model, wherein a plurality of the outward protrusions are arranged and distributed from one end to the other end of the outer wall of the ring body; the outer side surfaces of the plurality of outward protrusions are arranged as arc surfaces, and the outermost ends of the arc surfaces form multiple line contacts with the mating surface.

[0012] For a wear-resistant ring of the utility model, wherein the inward protrusion has an inclined surface facing the inner wall of the ring body; the two inclined surfaces arranged at both ends of the inner wall of the ring body limit the sealing component.

[0013] For a wear-resistant ring of the utility model, wherein the inner wall of the ring body is arranged as a straight surface.

[0014] A piston assembly includes the wear-resistant ring described above, and further includes:

[0015] A piston valve body;

[0016] A piston valve core, wherein the piston valve core is arranged in the piston valve body; the piston valve core is movably arranged in the piston valve body; the piston valve core includes a sealing end arranged at one end and used for installing the wear-resistant ring; and

[0017] A sealing gasket, wherein the sealing gasket is arranged at at least one end of the piston valve core; during the movement of the piston valve core, the sealing gasket makes contact with or disengages from the piston valve body.

[0018] A piston assembly of the present utility model, wherein the piston valve core includes an O-ring; the sealing end has a mounting groove facing the inner wall of the piston valve body; the wear-resistant ring is arranged in the mounting groove; the O-ring is arranged in the mounting groove and abuts against the inner wall of the circular ring body and the two inclined surfaces, so that the outward protrusion abuts against the inner wall of the piston valve body.

[0019] A piston assembly of the present utility model, which further includes a rear cover arranged at one end of the piston valve body and a piston spring arranged on the rear cover; one end of the piston valve core abuts against the piston spring.

[0020] A piston assembly of the present utility model, wherein the piston valve body is provided with an inlet at both ends and an outlet arranged between the two inlets; two sealing gaskets are provided and are respectively arranged in one of the two inlets; during the movement of the piston valve core, one of the two sealing gaskets closes the inlet at its end, and the other opens the inlet at its end. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a cross-sectional view of the wear-resistant ring of the present utility model;

[0022] Figure 2 It is a schematic diagram of an embodiment of the cross-section of the wear-resistant ring of the present utility model;

[0023] Figure 3 It is a schematic diagram of another embodiment of the cross-section of the wear-resistant ring of the present utility model;

[0024] Figure 4 It is a three-dimensional schematic diagram of the piston assembly of the present utility model;

[0025] Figure 5 It is a cross-sectional view of the piston assembly of the present utility model;

[0026] Figure 6 It is an enlarged schematic diagram of the cooperation of the wear-resistant ring in the piston assembly of the present utility model;

[0027] Figure 7 It is a side view of the piston assembly of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] Before describing any embodiments of the present utility model in detail, it should be understood that the present utility model is not limited in its application to the details of the construction and arrangement of components described below or illustrated in the following drawings. The present utility model is capable of having other embodiments and of being practiced or carried out in various ways. Additionally, it should be understood that the terminology and terms used herein are for the purpose of description and should not be considered restrictive. As used herein, the terms "comprising" or "having" and their variants are intended to cover the listed items and their equivalents as well as additional items. Unless otherwise specified or limited, the terms "mounted", "connected", "supported" and "coupled" and their variants are used broadly and cover both direct and indirect mounting, connection, support and coupling. Furthermore, "connected" and "coupled" are not limited to physical or mechanical connection or coupling.

[0029] And, in the first aspect, in the disclosure of the present utility model, the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting the present utility model; in the second aspect, the term "one" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of one element can be one, while in other embodiments, the number of this element can be multiple. The term "one" should not be construed as limiting the quantity.

[0030] Those skilled in the art should understand that the embodiments of the present utility model described above and shown in the drawings are only examples and do not limit the present utility model. The object of the present utility model has been fully and effectively achieved. The functions and structural principles of the present utility model have been demonstrated and described in the embodiments. Without departing from the said principles, the embodiments of the present utility model can have any deformation or modification.

[0031] The embodiments of the present utility model will be further described below with reference to the drawings.

[0032] Please refer to Figures 1-7 A wear-resistant ring as shown, comprising a circular ring body 1, an outward protrusion 2 and an inward protrusion 3. The outward protrusion 2 is arranged on the outer wall of the circular ring body 1; the outward protrusion 2 is arranged to extend towards the side away from the circular ring body 1; the inward protrusion 3 is arranged at both ends of the circular ring body 1; the inward protrusion 3 extends from the inner wall of the circular ring body 1 towards the center of the circular ring body 1 so as to enclose an accommodation space for accommodating a sealing component through the circular ring body 1 and the two inward protrusions 3; the sealing component applies an elastic force to the inner wall of the circular ring body 1 so that the outward protrusion 2 forms a line contact with the mating surface.

[0033] In actual use, an outward protrusion 2 is provided on the outer wall of the circular ring body 1 of the present utility model, and the outward protrusion 2 extends toward the side away from the circular ring body 1, so that the circular ring body 1 that originally formed a surface contact with the mating surface becomes the outward protrusion 2 that forms a line contact with the mating surface. Thus, on the basis of ensuring the sealing effect, the response time is shortened, and the friction between the circular ring body 1 and the mating surface is reduced, so that the service lives of both are extended. It also includes an inward protrusion 3, and a receiving space for accommodating the sealing component is formed by the circular ring body 1 and the two inward protrusions 3, so that the sealing component can be stably matched with the circular ring body 1. In this structure, on the basis of playing a sealing role, the sealing component can also provide an outward acting force to the circular ring body 1 and the outward protrusion 2, so that the outward protrusion 2 can abut against the mating surface. When the outward protrusion 2 is slightly worn after being used for a period of time, the acting force provided by the sealing component can enable the outward protrusion 2 to continue to abut against the mating surface, so that the wear-resistant ring can continue to maintain the sealing effect, thereby improving the service lives of the wear-resistant ring and the piston assembly.

[0034] Please continue to refer to Figure 2 , in one embodiment, the outward protrusion 2 is arranged to extend from one end of the outer wall of the circular ring body 1 to the other end; the outer side surface of the outward protrusion 2 is arranged as an arc surface, and the outermost end of the arc surface forms a line contact with the mating surface; this structural design of the outward protrusion 2 has the advantages of simple manufacturing and low cost on the premise of meeting the sealing performance.

[0035] Please continue to refer to Figure 3 , in another embodiment, the outward protrusion 2 is arranged in a plurality, and is distributed from one end of the outer wall of the circular ring body 1 to the other end; the outer side surfaces of the plurality of outward protrusions 2 are arranged as arc surfaces, and the outermost ends of the arc surfaces form multiple line contacts with the mating surface; this structural design of the outward protrusion 2 has a better sealing effect compared with the previous embodiment.

[0036] Please continue to refer to Figure 1 , Figure 2 , Figure 3 , wherein the inward protrusion 3 has an inclined surface 31 facing the inner wall of the circular ring body 1; the two inclined surfaces 31 arranged at both ends of the inner wall of the circular ring body 1 limit the sealing component; through the setting of the limit, the elastic force applied by the sealing component can be directed positively toward the circular ring body 1, so that the outward protrusion 2 abuts against the mating surface positively, so as to prevent the outward protrusion 2 from being eccentrically worn during the movement of the wear-resistant ring, thereby improving the service life of the wear-resistant ring.

[0037] Please further refer to Figure 2 , Figure 3, where the inner wall of the ring body 1 is set as a straight surface. Since two inclined surfaces 31 are provided to limit the sealing component, setting the inner wall of the ring body 1 as a straight surface can reduce the processing difficulty and thus reduce the manufacturing cost of the wear-resistant ring.

[0038] Furthermore, when there is no outward protrusion 2 on the outer wall of the ring body 1, a test is carried out under the condition of a pressure of 5 bar, and the test data A shown in the following table is obtained:

[0039]

[0040]

[0041] When there is an outward protrusion 2 on the outer wall of the ring body 1, a test is carried out under the condition of a pressure of 5 bar, and the test data B shown in the following table is obtained:

[0042]

[0043] It can be seen from the comparison of test data A and test data B that when there is an outward protrusion 2 and the protrusions 3 enclose a receiving space for the sealing component and cooperate with the sealing component arranged therein, the response time of the piston assembly and the sealing effect of the wear-resistant ring are improved.

[0044] Please continue to refer to Figures 4-7 A piston assembly shown, which includes the aforementioned wear-resistant ring, and also includes a piston valve body 4, a piston valve core 5, and a sealing gasket 6; wherein the piston valve core 5 is arranged inside the piston valve body 4; the piston valve core 5 is movably arranged inside the piston valve body 4; the piston valve core 5 includes a sealing end 51 arranged at one end and used for installing the wear-resistant ring, and the sealing gasket 6 is arranged at at least one end of the piston valve core 5; during the movement of the piston valve core 5, the sealing gasket 6 realizes contact or disengagement with the piston valve body 4.

[0045] Furthermore, the piston valve core 5 includes an O-ring 52; the sealing end 51 has a mounting groove 511 facing the inner wall of the piston valve body 4; the wear-resistant ring is arranged in the mounting groove 511; the O-ring 52 is arranged in the mounting groove 511 and abuts against the inner wall of the ring body 1 and the two inclined surfaces 31, so that the outward protrusion 2 abuts against the inner wall of the piston valve body 4; further includes a rear cover 7 arranged at one end of the piston valve body 4, and a piston spring 8 arranged on the rear cover 7; one end of the piston valve core 5 abuts against the piston spring 8; the piston valve body 4 is set to have an inlet 41 at both ends, and an outlet 42 arranged between the two inlets 41; two sealing gaskets 6 are arranged, and are respectively arranged in one of the two inlets 41; during the movement of the piston valve core 5, one of the two sealing gaskets 6 closes the inlet 41 at the corresponding end, and the other opens the inlet 41 at the corresponding end.

[0046] In actual use, driven by the piston valve core 5, the two gaskets 6 are respectively engaged with the sealing structures at both ends of the piston valve body 4. Specifically, one end of the gasket 6 facing the outlet 42 is provided with a sealing inclined surface, and the inner wall of the piston valve body 4 at the positions on both sides of the outlet 42 is also provided with a sealing inclined surface. When the two sealing inclined surfaces are in contact with each other, the corresponding inlet 41 cannot be conducted, while the inlet 41 at the other end is conducted; the piston valve core 5 can move towards the end where the rear cover 7 is located in the piston valve body 4, or can be reset under the action of the piston spring 8, and the two inlets 41 are alternately conducted, so as to realize the function of two-position three-way. Moreover, during this process, the sealing end 51 and the inner wall of the piston valve body 4 are in a relative motion state, and through the design of the O-ring 52 and wear-resistant ring provided on the sealing end 51, while the sealing function of the sealing end 51 is realized, the wear can be reduced, and thus the overall service life of the piston assembly can be improved.

[0047] Furthermore, since the outward protrusion 2 itself is in contact with the inner wall of the piston valve body 4 and is in a line contact state, during continuous use, the outermost circle of material of the outward protrusion 2 will be worn first, making the outward protrusion 2 itself in a critical state between line contact and surface contact with the inner wall of the piston valve body 4. At this time, due to the elastic force of the O-ring 52, the outward protrusion 2 can be slightly deformed outwards, so that the unworn material inside the outward protrusion 2 continues to abut against the inner wall of the piston valve body 4 and continues to maintain the sealing function, thereby improving the service life of the wear-resistant ring and the piston assembly.

[0048] The above is only an illustration of the best embodiment of the present invention, but it should not be construed as a limitation to the claims. The present invention is not limited to the above embodiments, and its specific structure allows changes. Any changes made within the protection scope of the independent claims of the present invention are within the protection scope of the present invention.

Claims

1. A wear-resistant ring, characterized in that, Comprising: A circular ring body (1); An outward protrusion (2), wherein the outward protrusion (2) is disposed on the outer wall of the circular ring body (1); the outward protrusion (2) is arranged to extend towards the side away from the circular ring body (1); and An inward protrusion (3), wherein the inward protrusion (3) is disposed at both ends of the circular ring body (1); the inward protrusion (3) extends from the inner wall of the circular ring body (1) towards the center of the circular ring body (1), so as to form an accommodation space for accommodating a sealing member through the circular ring body (1) and the two inward protrusions (3); the sealing member applies an elastic force to the inner wall of the circular ring body (1), so that the outward protrusion (2) forms a line contact with the mating surface.

2. The wear-resistant ring according to claim 1, characterized in that: The outward protrusion (2) is arranged to extend from one end to the other end of the outer wall of the circular ring body (1); the outer side surface of the outward protrusion (2) is arranged as an arc surface, and the outermost end of the arc surface forms a line contact with the mating surface.

3. The wear-resistant ring according to claim 1, wherein: The outward protrusions (2) are arranged as a plurality, and are distributed from one end to the other end of the outer wall of the circular ring body (1); the outer side surfaces of the plurality of outward protrusions (2) are arranged as arc surfaces, and the outermost ends of the arc surfaces form multiple line contacts with the mating surface.

4. The wear-resistant ring according to claim 1, wherein: The inward protrusion (3) has an inclined surface (31) arranged towards the inner wall of the circular ring body (1); the two inclined surfaces (31) arranged at both ends of the inner wall of the circular ring body (1) limit the sealing member.

5. The wear-resistant ring according to claim 1, wherein: The inner wall of the circular ring body (1) is arranged as a straight surface.

6. A piston assembly comprising the wear-resistant ring according to any one of claims 1-5, characterized in that, Comprising: A piston valve body (4); A piston valve core (5), wherein the piston valve core (5) is disposed in the piston valve body (4); the piston valve core (5) is movably disposed in the piston valve body (4); the piston valve core (5) includes a sealing end (51) arranged at one end and used for installing a wear-resistant ring; And A sealing gasket (6), wherein the sealing gasket (6) is disposed at at least one end of the piston valve core (5); during the movement of the piston valve core (5), the sealing gasket (6) makes contact with or disengages from the piston valve body (4).

7. The piston assembly according to claim 6, wherein: The piston valve core (5) includes an O-ring (52); the sealing end (51) has a mounting groove (511) facing the inner wall of the piston valve body (4); the wear-resistant ring is disposed in the mounting groove (511); the O-ring (52) is disposed in the mounting groove (511) and abuts against the inner wall of the circular ring body (1) and the two inclined surfaces (31), so that the outward protrusion (2) abuts against the inner wall of the piston valve body (4).

8. The piston assembly according to claim 6, characterized in that: Further comprising a rear cover (7) disposed at one end of the piston valve body (4), and a piston spring (8) disposed on the rear cover (7); one end of the piston valve core (5) abuts against the piston spring (8).

9. The piston assembly according to claim 8, wherein: The piston valve body (4) is provided with an inlet (41) at both ends and an outlet (42) disposed between the two inlets (41); two sealing gaskets (6) are provided and are respectively disposed in one of the two inlets (41); during the movement of the piston valve core (5), one of the two sealing gaskets (6) closes the inlet (41) at its corresponding end, and the other opens the inlet (41) at its corresponding end.

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