Pipeline double-flange limiting compensation joint

Abstract

The utility model relates to the technical field of pipelines, in particular to a pipeline double-flange limiting compensation joint. Comprising a first member; the second component is slidably arranged on the outer side of the first component in a sleeving manner; the third component is slidably arranged on the outer side of the first component in a sleeving manner; the sealing piece is slidably arranged on the outer side of the first component in a sleeving mode and located between the second component and the third component; the side, facing the second component, of the sealing piece is provided with a groove, and the second component is provided with a protrusion matched with the groove. The sealing element is a conical sealing ring; a conical sealing groove is formed in the end, facing the sealing piece, of the third component, and the conical sealing groove is matched with the peripheral face of the sealing piece. The groove of the sealing piece is a conical groove, and the protrusion is a conical protrusion matched with the groove. The sealing performance can be remarkably improved, and medium leakage is effectively prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to pipeline technical field, concretely is pipeline double flange limit compensation joint. BACKGROUND

[0002] Pipeline double flank limit compensation joint is a kind of connecting element widely used in pipeline system, it is installed by the butt joint of two end flanges and pipeline flange plate, with the ability of compensating pipeline displacement in limited range, and prevent pipeline from being disconnected due to excessive expansion by limiting structure, to ensure the safe operation of system.

[0003] However, in the existing structure, the sealing ring of the joint is affected by the pressure and temperature fluctuation of the medium in the pipeline for a long time, which can easily lead to the attenuation of the material performance, and then affect the stability of the sealing effect.In addition, when the pipeline is deformed, the reciprocating motion of the joint will continuously wear the contact surface of the sealing ring, accelerate the decline of its sealing performance, eventually cause medium leakage, affect the reliability and service life of the pipeline system.

[0004] Therefore, to provide a double-flange limiting compensation joint with a more reliable sealing structure has become a technical problem to be solved in the field. INVENTION CONTENTS

[0005] To solve the technical problems in the background art, the utility model provides a pipeline double flange limit compensation joint, which can significantly improve the sealing performance and effectively prevent medium leakage.

[0006] The technical scheme adopted by the utility model to solve its technical problems is:

[0007] The pipeline double flange limit compensation joint comprises:

[0008] The first component;

[0009] The second component is slidably sleeved on the outside of the first component;

[0010] The third component is slidably sleeved on the outside of the first component;

[0011] The sealing element is slidably sleeved on the outside of the first component and located between the second component and the third component;

[0012] The side of the sealing element facing the second component is provided with a groove, and the second component is provided with a protrusion matched with the groove.

[0013] Further, the sealing element is a conical sealing ring;

[0014] The end of the third component facing the sealing element is provided with a conical sealing groove, and the conical sealing groove is matched with the outer peripheral surface of the sealing element.

[0015] Further, the recess of the sealing member is a tapered recess, and the protrusion is a tapered protrusion matched with the recess.

[0016] Further, a long stud is fixedly arranged on the third member, the long stud passes through the second member and is threadedly connected with the first nut, and the first nut abuts against a side of the second member away from the third member.

[0017] Further, the first member is provided with a first connecting flange, the long stud passes through the first connecting flange and is threadedly connected with the fourth nut.

[0018] Further, a third nut is threadedly connected with the long stud, and the third nut is located between the first connecting flange and the first nut.

[0019] Further, a short stud is fixedly arranged on the third member, the short stud passes through the second member and is threadedly connected with the second nut.

[0020] Further, the first member is provided with a first connecting flange, the long stud passes through the first connecting flange and is threadedly connected with the fourth nut.

[0021] The utility model discloses beneficial effects:

[0022] (1) can significantly improve the sealing performance, effectively prevent medium leakage.

[0023] (2) the tapered protrusion is arranged on the second member, and is matched with the tapered recess on the sealing member. When assembling, the tapered protrusion of the second member is embedded in the tapered recess of the sealing member, under the action of axial pressure, the protrusion extrudes the recess sidewall along the taper, so that the sealing member is subjected to radial expansion force, and is elastically opened to both sides. Make the sealing member two sides respectively close to the mating surface of the first member and the third member, enhance the contact stress, effectively eliminate the assembly gap, realize reliable sealing effect, prevent the medium in the pipeline from leaking.

[0024] (3) through the cooperation of the long stud, the third nut and the fourth nut, the relative sliding distance between the first member and the third member can be adjusted and limited, so that the problems of joint disconnection or sealing failure caused by excessive expansion of the pipeline are avoided.

[0025] (4) through the cooperation of the long stud and the first nut, and the cooperation of the short stud and the second nut, the second member can be adjusted and pre-tightened, so that the pre-tightening force of the sealing member can be adjusted according to the actual working condition, and the sealing state is optimized. BRIEF DESCRIPTION OF DRAWINGS

[0026] The utility model is further illustrated below in combination with the drawings and examples.

[0027] Figure 1 It is the structure schematic diagram of the utility model;

[0028] Figure 2 This is an exploded view of the present invention;

[0029] Figure 3 This is a cross-sectional view of the present invention;

[0030] Figure 4 yes Figure 3 A magnified view of a portion of location A in the middle.

[0031] In the picture:

[0032] 1. First component, 2. Second component, 3. Seal, 4. Third component, 5. Long stud, 6. Short stud, 7. First nut, 8. Second nut, 9. Third nut, 10. Fourth nut;

[0033] 101. First connecting flange; 102. Second connecting flange;

[0034] 201. Protrusion;

[0035] 401. Conical sealing groove. Detailed Implementation

[0036] The present invention will be further described in detail below with reference to the accompanying drawings.

[0037] like Figure 1 , 2 As shown, the double-flange limiting compensation joint for pipelines significantly improves sealing performance and effectively prevents media leakage. Its specific structure includes a first component 1, a second component 2 slidably fitted onto the outside of the first component 1, and a third component 4 slidably fitted onto the outside of the first component 1. A sealing element 3 is slidably fitted onto the outside of the first component 1 and located between the second component 2 and the third component 4.

[0038] like Figure 3 , 4 As shown, the sealing element 3 has a groove on the side facing the second component 2, and the second component 2 has a protrusion 201 that matches the groove. In a specific embodiment, the sealing element 3 is a conical sealing ring. The third component 4 has a conical sealing groove 401 on one end facing the sealing element 3, and the conical sealing groove 401 is adapted to the outer peripheral surface of the sealing element 3. The groove of the sealing element 3 is a conical groove, and the protrusion 201 is a conical protrusion that matches the groove. The second component 2 compresses the sealing element 3, so that both sides of the sealing element 3 are sealed and fitted with the third component 4 and the first component 1 respectively. Furthermore, on this basis, a conical protrusion 201 is provided on the second component 2, which cooperates with the conical groove on the sealing element 3.

[0039] When assembled, the tapered protrusion 201 of the second member 2 is embedded in the tapered groove of the sealing member 3, under the action of axial pressure, the protrusion 201 extrudes the groove sidewall along the tapered surface, so that the sealing member 3 is subjected to radial expansion force, and is elastically expanded to both sides. The mating surfaces of the sealing member 3 on both sides are tightly attached to the first member 1 and the third member 4 respectively, further enhancing the contact stress, effectively eliminating the assembly gap, and achieving reliable sealing effect to prevent leakage of the medium in the pipeline.

[0040] The third member 4 is fixedly provided with a plurality of long studs 5 away from the second member 2, the long studs 5 pass through the second member 2 and are threadedly connected with the first nut 7, the first nut 7 abuts against the side of the second member 2 away from the third member 4. The third member 4 is fixedly provided with a plurality of short studs 6, the short studs 6 pass through the second member 2 and are threadedly connected with the second nut 8, the second nut 8 abuts against the side of the second member 2 away from the third member 4. The long studs 5 and the short studs 6 are arranged at intervals.

[0041] Through the cooperation of the long studs 5 and the first nut 7, and the cooperation of the short studs 6 and the second nut 8, the second member 2 can be adjusted and pre-tightened, which is convenient for adjusting the pre-tightening force of the sealing member 3 according to the actual working condition, and optimizing the sealing state.

[0042] The first member 1 is provided with a first connecting flange 101, the long studs 5 pass through the first connecting flange 101 and are threadedly connected with the fourth nut 10. The long studs 5 are also threadedly connected with the third nut 9, and the third nut 9 is located between the first connecting flange 101 and the first nut 7. Through the cooperation of the long studs 5, the third nut 9 and the fourth nut 10, the relative sliding distance between the first member 1 and the third member 4 can be adjusted and limited, so as to avoid the problems of joint disconnection or sealing failure caused by excessive expansion and contraction of the pipeline.

[0043] The first member 1 is provided with a first connecting flange 101, the long studs 5 pass through the first connecting flange 101 and are threadedly connected with the fourth nut 10. The long studs 5 are also threadedly connected with the third nut 9, and the third nut 9 is located between the first connecting flange 101 and the first nut 7. Through the cooperation of the long studs 5, the third nut 9 and the fourth nut 10, the relative sliding distance between the first member 1 and the third member 4 can be adjusted and limited, so as to avoid the problems of joint disconnection or sealing failure caused by excessive expansion and contraction of the pipeline.

[0044] Based on the above ideal embodiments according to the present application, through the above description, relevant personnel can make various changes and modifications without deviating from the technical concept of the present application. The technical scope of the present application is not limited to the contents in the specification, and must be determined according to the scope of the claims.

Claims

1. A pipe double-flanged limited compensation joint, characterized in that, The utility model relates to a pipe double flange limiting compensation joint, which comprises the following components: a first component (1); a second component (2) sleeved on the outside of the first component (1) in a slidable manner; a third component (4) sleeved on the outside of the first component (1) in a slidable manner; a sealing element (3) sleeved on the outside of the first component (1) in a slidable manner and located between the second component (2) and the third component (4); a recess is formed in the side of the sealing element (3) facing the second component (2), and the second component (2) is provided with a protrusion (201) matched with the recess.

2. The pipe double flange limiting compensation joint according to claim 1, characterized in that the sealing element (3) is a conical sealing ring; a conical sealing groove (401) is formed in one end of the third component (4) facing the sealing element (3), and the conical sealing groove (401) is matched with the outer circumferential surface of the sealing element (3).

3. The pipe double flange limiting compensation joint according to claim 1, characterized in that the recess of the sealing element (3) is a conical recess, and the protrusion (201) is a conical protrusion matched with the recess.

4. The pipe double flange limiting compensation joint according to claim 1, characterized in that a long stud (5) is fixedly arranged on the third component (4), the long stud (5) penetrates through the second component (2) and is threadedly connected with a first nut (7), and the first nut (7) abuts against the side of the second component (2) away from the third component (4).

5. The pipe double flange limiting compensation joint according to claim 4, characterized in that the first component (1) is provided with a first connecting flange (101), the long stud (5) penetrates through the first connecting flange (101) and is threadedly connected with a fourth nut (10).

6. The pipe double flange limiting compensation joint according to claim 5, characterized in that a third nut (9) is threadedly connected with the long stud (5), and the third nut (9) is located between the first connecting flange (101) and the first nut (7).

7. The pipe double flange limiting compensation joint according to claim 1, characterized in that a short stud (6) is fixedly arranged on the third component (4), the short stud (6) penetrates through the second component (2) and is threadedly connected with a second nut (8).

8. The pipe double flange limiting compensation joint according to claim 1, characterized in that a second connecting flange (102) is arranged at the end of the first component (1) away from the second component (2).

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