Positive and negative pressure sealing ring and pipeline connection structure

Abstract

The present invention discloses a positive and negative pressure sealing ring and a pipeline connection structure, wherein the positive and negative pressure sealing ring comprises: a sealing ring body, wherein the sealing ring body comprises: an end face sealing boss, wherein the end face sealing boss is formed on the inner wall of the sealing ring body and extends inward; a peripheral face sealing boss, wherein the peripheral face sealing boss is formed on the inner wall of the sealing ring body and extends inward, wherein the peripheral face sealing boss comprises a first end face and a second end face, wherein the first end face faces the end face sealing boss, wherein a positive pressure action groove is formed on the first end face, wherein the positive pressure action groove is arranged on a side of the peripheral face sealing boss adjacent to the sealing ring body, and wherein a negative pressure action groove is formed on the second end face. The positive and negative pressure sealing ring can make the inner side surface of the peripheral face sealing boss fit more closely with the external pipe fitting in both positive and negative pressure environments, and the positive and negative pressure sealing ring has good positive and negative pressure sealing performance.

Description

Technical Field

[0001] The invention relates to the technical field of pipe connection, in particular to a positive and negative pressure sealing ring. Background Art

[0002] Pipeline systems are widely used in industrial production. The working conditions of pipelines in industrial production can be divided into positive pressure and negative pressure. Under general pressure conditions, sealing rings can cope with both environments. However, for pipeline environments with a certain pressure, specific sealing rings are required to enhance the sealing force under positive pressure. Although this type of sealing ring that can enhance positive pressure can better ensure the sealing under positive pressure environment when used, it is not suitable for negative pressure environment, which limits the use of pipeline systems. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art.

[0004] The present invention provides a positive and negative pressure sealing ring, comprising: a sealing ring body, wherein the sealing ring body comprises:

[0005] An end face sealing boss, the end face sealing boss is formed on the inner wall of the sealing ring body and extends inwardly;

[0006] A circumferential sealing boss, wherein the circumferential sealing boss is formed on the inner wall of the sealing ring body and extends inwardly, wherein the circumferential sealing boss includes a first end face and a second end face, wherein the first end face faces the end face sealing boss, wherein a positive pressure action groove is formed on the first end face, wherein the positive pressure action groove is arranged on a side of the circumferential sealing boss adjacent to the sealing ring body, and wherein a negative pressure action groove is formed on the second end face.

[0007] The beneficial effects of the present invention are as follows: when the positive and negative pressure sealing ring is in a positive pressure environment, the pressure between the end face sealing boss and the circumferential surface sealing boss is higher than the atmospheric pressure. Since the positive pressure action groove and the negative pressure action groove are arranged on the first end face and the second end face, the circumferential surface sealing boss can use the positions of the positive pressure action groove and the negative pressure action groove as fulcrums to form a tendency to swing away from the end face sealing boss; similarly, when in a negative pressure environment, the pressure between the end face sealing boss and the circumferential surface sealing boss is less than the atmospheric pressure, so that the circumferential surface sealing boss forms a tendency to swing toward the end face sealing boss, thereby making the inner side surface of the circumferential surface sealing boss fit more closely with the external pipe fitting in both positive and negative pressure environments, so that the positive and negative pressure sealing ring has the ability to enhance the sealing performance in both positive and negative pressure environments, and the positive and negative pressure sealing ring has good positive and negative pressure sealing performance.

[0008] Furthermore, the formation of the negative pressure acting groove can make it easier for the peripheral surface sealing platform to swing outward when positive pressure acts on the positive pressure acting groove.

[0009] As some sub-solutions of the above technical solution, the outer side surface of the positive pressure action groove is connected to the inner edge of the sealing ring body.

[0010] As some sub-solutions of the above technical solution, the outer side surface and the inner side surface of the positive pressure action groove are connected by an arc segment transition.

[0011] As some sub-solutions of the above technical solution, the negative pressure action groove and the positive pressure action groove are arranged in a staggered manner, and the negative pressure action groove is located in the direction where the positive pressure action groove points to the inner side of the sealing ring body.

[0012] As some sub-solutions of the above technical solution, a first sealing cone surface is also formed on the circumferential surface sealing boss, and the first sealing cone surface is arranged on the second end face, and the radius of the first sealing cone surface along the side pointing from the circumferential surface sealing boss to the end face sealing boss and away from the end face sealing boss is greater than the radius of the side adjacent to the end face sealing boss.

[0013] As some sub-solutions of the above technical solution, a second sealing cone surface is also formed on the circumferential sealing boss, and the second sealing cone surface is arranged on the first end face, and the outer diameter of the second sealing cone surface facing away from the end face sealing boss is larger than the outer diameter of the side away from the end face sealing boss.

[0014] As some sub-solutions of the above technical solution, the second end face is coplanar with the end face of the sealing ring body, the second end face is annular and inclined, and the second end face gradually expands outward along the direction of the circumferential sealing boss pointing to the end face sealing boss.

[0015] As some sub-solutions of the above technical solution, the number of the circumferential surface sealing bosses is two, and the two circumferential surface sealing bosses are symmetrically arranged with respect to the end surface sealing boss.

[0016] The present invention also provides a pipeline connection structure, comprising:

[0017] The positive and negative pressure sealing ring described in any of the above technical solutions;

[0018] A pipe joint, wherein the positive and negative pressure sealing rings are arranged in the pipe joint;

[0019] A pipe fitting, wherein the pipe fitting extends into the sealing ring body, the outer peripheral surface of the pipe fitting abuts against the inner side surface of the peripheral surface sealing boss, and the end surface of the pipe fitting abuts against the end surface sealing boss;

[0020] A locking piece is used to lock the pipe piece on the pipe joint.

[0021] The pipeline connection structure provided by the present invention includes the positive and negative pressure sealing rings described in any of the above technical solutions, so it also has the beneficial effects of the above positive and negative pressure sealing rings.

[0022] As some sub-solutions of the above technical solution, a limiting flange is formed on the outer periphery of the pipe, a limiting groove is formed on the inner wall of the locking piece, and the limiting flange is confined in the limiting groove.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0025] Figure 1 It is a cross-sectional structural schematic diagram of the pipeline connection structure of the present invention;

[0026] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0027] Figure 3 It is a structural schematic diagram of the pipeline connection structure under a positive pressure environment;

[0028] Figure 4 It is a structural schematic diagram of the pipeline connection structure under negative pressure environment.

[0029] In the accompanying drawings: 1- sealing ring body; 11- end face sealing boss; 12- circumferential surface sealing boss; 121- first end face; 1211- positive pressure action groove; 122- second end face; 1221- negative pressure action groove; 123- first sealing cone surface; 124- second sealing cone surface; 2- pipe joint; 3- pipe fitting. DETAILED DESCRIPTION

[0030] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0031] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In the description of the present invention, the meaning of "several" is an indefinite quantity, the meaning of "multiple" is more than two, "greater than", "less than", "exceed", etc. are understood as not including the number itself, and "above", "below", "within", etc. are understood as including the number itself. If there is a description of the first and the second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features. The "and / or" that appears in the full text represents three parallel solutions. For example, A and / or B represents the solution satisfied by A, the solution satisfied by B, or the solution satisfied by both A and B.

[0033] In the description of the present invention, if there is a short sentence containing multiple parallel features, the attributive defines the closest feature, for example: B, C, and E connected to D are arranged on A, which means that B is arranged on A and E is connected to D, and does not constitute a limitation on C; but attributives that indicate the relationship between features, such as "interval arrangement" and "circular arrangement", do not belong to this category. If the word "all" is preceded by an attributive, it means that all features in the short sentence are limited, such as B, C, and D are all arranged on A, which means that B, C, and D are all arranged on A. For a sentence with an omitted subject, the omitted subject is the subject of the previous sentence, that is, B is arranged on A, including C, which means that B is arranged on A and A includes C.

[0034] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0035] Combine the following Figures 1 to 4 Embodiments of the present invention are described.

[0036] The pipeline connection structure of the present invention comprises: positive and negative pressure sealing rings, a pipe joint 2 and a pipe fitting 3;

[0037] The positive and negative pressure sealing rings are arranged in the pipe joint 2;

[0038] The pipe fitting 3 extends into the sealing ring body 1 included in the positive and negative pressure sealing ring, the outer peripheral surface of the pipe fitting 3 abuts against the inner side surface of the peripheral surface sealing boss 12 included in the positive and negative pressure sealing ring, and the end surface of the pipe fitting 3 abuts against the end surface sealing boss 11 included in the positive and negative pressure sealing ring;

[0039] A locking piece (not shown in the figure), wherein the locking piece locks the pipe piece 3 on the pipe joint 2.

[0040] Since the pipeline connection structure includes positive and negative pressure sealing rings, the pipeline connection structure can achieve a good sealing effect when positive pressure or negative pressure is passed into the pipe fitting 3, thereby improving the deficiency of the prior art that the sealing ability is good only in a positive pressure environment or only in a negative pressure environment, and broadening the applicability of the pipeline system by improving the sealing.

[0041] The specific positive and negative pressure sealing ring includes: a sealing ring body 1, and the sealing ring body 1 includes:

[0042] An end face sealing boss 11, wherein the end face sealing boss 11 is formed on the inner wall of the sealing ring body 1 and extends inwardly;

[0043] A circumferential sealing boss 12 is formed on the inner wall of the sealing ring body 1 and extends inwardly, and the circumferential sealing boss 12 includes a first end face 121 and a second end face 122, the first end face 121 faces the end face sealing boss 11, a positive pressure action groove 1211 is formed on the first end face 121, and the positive pressure action groove 1211 is arranged on a side of the circumferential sealing boss 12 adjacent to the sealing ring body 1, and a negative pressure action groove 1221 is formed on the second end face 122.

[0044] When the pipe fitting 3 is inserted into the pipe joint 2 and sealed by the positive and negative pressure sealing ring, the front end of the pipe fitting 3 abuts against the end face sealing boss 11 to form a first seal, the outer periphery of the pipe fitting 3 abuts against the inner edge of the peripheral sealing boss 12 to form a second seal, and the negative pressure action groove 1221 is connected to the outside through the pipe joint 2. When the inside of the pipe fitting 3 is in a positive pressure environment, refer to Figure 3 If leakage occurs at the first seal, the pressure in the closed cavity formed by the outer wall of the pipe fitting 3, the peripheral sealing boss 12, the inner wall of the sealing ring body 1 and the end face sealing boss 11 increases, and the pressure between the end face sealing boss 11 and the peripheral sealing boss 12 is higher than the atmospheric pressure. Since the positive pressure groove 1211 and the negative pressure groove 1221 are provided on the first end face 121 and the second end face 122, the peripheral surface sealing boss 12 can form a tendency to swing away from the end surface sealing boss 11 with the position of the positive pressure groove 1211 and the negative pressure groove 1221 as a fulcrum, and under the action of this tendency, the first inner side portion included in the positive pressure groove 1211 swings toward the pipe fitting 3 under a positive pressure environment to squeeze the peripheral surface sealing boss 12 inwardly, so that the contact between the peripheral surface sealing boss 12 and the outer wall of the pipe fitting 3 is closer, thereby being able to better ensure the sealing effect under a positive pressure environment.

[0045] The arrangement of the positive pressure action groove 1211 and the negative pressure action groove 1221 makes it easy for the inner side of the sealing ring body 1 to swing when the sealing ring body 1 is subjected to positive pressure. In addition to allowing the positive pressure to increase the sealing pressure on the pipe fitting 3 through the sealing ring body 1, the sealing ring body 1 is also easy to deform, so that the circumferential sealing boss 12 is more closely fitted to the outer wall of the pipe fitting 3, thereby further improving the sealing performance.

[0046] In a negative pressure environment, refer to Figure 4 The pressure in the closed cavity is lower than the atmospheric pressure, and the second inner portion of the negative pressure groove 1221 swings toward the pipe 3 under the negative pressure environment, so that the contact between the peripheral sealing boss 12 and the outer wall of the pipe 3 is closer, thereby ensuring the sealing effect.

[0047] Furthermore, the outer side surface of the positive pressure groove 1211 is connected to the inner edge of the sealing ring body 1. When positive pressure and negative pressure act on the positive pressure groove 1211, the peripheral sealing boss 12 forms a swinging tendency with the portion connected to the sealing ring body 1 as a fulcrum, and the peripheral sealing boss 12 forms a swinging tendency as a whole, and the supporting strength of the swinging part is relatively high. The formation of the swinging tendency can better strengthen the sealing of the pipe fitting 3.

[0048] Furthermore, the outer side surface and the inner side surface of the positive pressure groove 1211 are connected by an arc segment transition. The outer side surface and the inner side surface of the positive pressure groove 1211 are connected by an arc segment transition, which can increase the connection strength of the positive pressure groove 1211.

[0049] Furthermore, the negative pressure groove 1221 is staggered with the positive pressure groove 1211, and the negative pressure groove 1221 is located in the direction in which the positive pressure groove 1211 points to the inner side of the sealing ring body 1. The staggered arrangement of the negative pressure groove 1221 and the positive pressure groove 1211 can reduce the strength loss caused by forming the groove structure on the peripheral sealing boss 12, thereby ensuring the tight pressure between the inner side wall of the peripheral sealing boss 12 and the pipe 3, and ensuring the sealing ability.

[0050] Furthermore, a first sealing cone 123 is formed on the circumferential sealing boss 12. The first sealing cone 123 is arranged on the second end face 122. The radius of the first sealing cone 123 on the side away from the end face sealing boss 11 along the side pointing from the circumferential sealing boss 12 to the end face sealing boss 11 is greater than the radius of the side adjacent to the end face sealing boss 11. The arrangement of the first sealing cone 123, on the one hand, enables the circumferential sealing boss 12 to retract when the pipe 3 is inserted so that the pipe 3 can enter the sealing ring body 1. On the other hand, when the sealing ring body 1 is in a negative pressure environment, the first sealing cone 123 rotates to abut against the outer wall of the pipe 3 when the circumferential sealing boss 12 is swung by the negative pressure. The arrangement of the first sealing ring cone increases the contact area between the pipe 3 and the circumferential sealing boss 12 in the negative pressure environment, which is conducive to strengthening the seal and improving the sealing ability.

[0051] Furthermore, a second sealing cone 124 is formed on the circumferential sealing boss 12. The second sealing cone 124 is arranged on the first end face 121. The outer diameter of the second sealing cone 124 on the side away from the adjacent end face sealing boss 11 is larger than the outer diameter on the side away from the end face sealing boss 11. The second sealing cone 124 is arranged on the first end face 121. On the one hand, the area of ​​the inner side of the circumferential sealing boss 12 is reduced. When the pipe fitting 3 is inserted into the sealing ring body 1, the contact area with the circumferential sealing boss 12 is smaller, and the pipe fitting 3 is easier to insert into the sealing ring body 1. On the other hand, when the sealing ring body 1 is in a positive pressure environment, the circumferential sealing boss 12 is swung by the positive pressure, and the second sealing cone 124 is in close contact with the external pipe fitting 3, thereby increasing the contact area between the pipe fitting 3 and the circumferential sealing boss 12 under the positive pressure state and improving the sealing performance.

[0052] Furthermore, the second end face 122 is coplanar with the end face of the sealing ring body 1, the second end face 122 is annular and inclined, and the second end face 122 gradually expands outward along the direction from the peripheral sealing boss 12 to the end face sealing boss 11. By configuring the second end face 122 to be inclined, it is possible to facilitate the installation and positioning of the sealing ring body 1 and to facilitate the installation of the sealing ring body 1 into the pipe joint 2.

[0053] Furthermore, there are two circumferential sealing bosses 12, which are symmetrically arranged about the end face sealing boss 11. By configuring two circumferential sealing bosses 12, the pipes 3 on both sides can be sealed, so that the positive and negative pressure sealing ring can conveniently realize the sealed connection of the two pipes 3.

[0054] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of the present invention.

Claims

1. Positive and negative pressure sealing ring, characterized by: include: A sealing ring body (1), the sealing ring body (1) comprising: An end face sealing boss (11), wherein the end face sealing boss (11) is formed on the inner wall of the sealing ring body (1) and extends inwardly; A circumferential sealing boss (12), the circumferential sealing boss (12) being formed on the inner wall of the sealing ring body (1) and extending inwardly, the circumferential sealing boss (12) comprising a first end face (121) and a second end face (122), the first end face (121) facing the end face sealing boss (11), a positive pressure action groove (1211) being formed on the first end face (121), the positive pressure action groove (1211) being arranged on a side of the circumferential sealing boss (12) adjacent to the sealing ring body (1) , a negative pressure groove (1221) is formed on the second end surface (122); a first sealing cone surface (123) is also formed on the circumferential surface sealing boss (12), the first sealing cone surface (123) is arranged on the second end surface (122), and the radius of the first sealing cone surface (123) along the side pointing from the circumferential surface sealing boss (12) to the end surface sealing boss (11) and away from the end surface sealing boss (11) is greater than the radius of the side adjacent to the end surface sealing boss (11); A second sealing conical surface (124) is also formed on the circumferential surface sealing boss (12), and the second sealing conical surface (124) is arranged on the first end surface (121), and the outer diameter of the second sealing conical surface (124) facing away from the end surface sealing boss (11) is larger than the outer diameter of the side facing away from the end surface sealing boss (11).

2. The positive and negative pressure sealing ring according to claim 1, characterized in that: The outer side surface of the positive pressure action groove (1211) is connected to the inner edge of the sealing ring body (1).

3. The positive and negative pressure sealing ring according to claim 2, characterized in that: The outer side surface and the inner side surface of the positive pressure action groove (1211) are connected by an arc segment transition.

4. The positive and negative pressure sealing ring according to claim 1, characterized in that: The negative pressure action groove (1221) and the positive pressure action groove (1211) are arranged in a staggered manner, and the negative pressure action groove (1221) is located in a direction from the positive pressure action groove (1211) to the inner side of the sealing ring body (1).

5. The positive and negative pressure sealing ring according to claim 1, characterized in that: The second end face (122) is coplanar with the end face of the sealing ring body (1); the second end face (122) is annular and inclined; the second end face (122) gradually expands outwards in a direction from the peripheral sealing boss (12) to the end face sealing boss (11).

6. The positive and negative pressure sealing ring according to claim 5, characterized in that: The number of the circumferential surface sealing bosses (12) is two, and the two circumferential surface sealing bosses (12) are symmetrically arranged with respect to the end surface sealing boss (11).

7. Pipeline connection structure, characterized in that: include: The positive and negative pressure sealing ring according to any one of claims 1 to 6; A pipe joint (2), wherein the positive and negative pressure sealing rings are arranged inside the pipe joint (2); A pipe fitting (3), the pipe fitting (3) extending into the sealing ring body (1), the outer peripheral surface of the pipe fitting (3) abutting against the inner side surface of the peripheral surface sealing boss (12), and the end surface of the pipe fitting (3) abutting against the end surface sealing boss (11); A locking piece, wherein the locking piece locks the pipe piece (3) on the pipe joint (2).

8. The pipeline connection structure according to claim 7, characterized in that: A limiting flange is formed on the outer periphery of the pipe (3), a limiting groove is formed on the inner wall of the locking piece, and the limiting flange is confined within the limiting groove.

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