Novel large-diameter split clamp
By dividing the sealing interval of the large-diameter fuse fixture into multiple small sealing spaces, combined with the design of the fastening assembly and sealing assembly, the problem of difficulty in fastening when dealing with small leakage points or ring weld leakage in the prior art is solved, and a more efficient leakage plugging effect is achieved.
Patent Information
- Application Number
- CN202422054293.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-23
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-08-23
AI Technical Summary
When existing large-diameter double-opening fixtures deal with small leakage points or ring weld leakage, the sealing area is too large, which leads to difficulty in tightening and cannot effectively block the leakage.
A new large-diameter double-opening fixture is designed to divide the sealing interval into multiple small sealing spaces. Through the cooperation of the fastening assembly, the axial sealing assembly and the annular sealing assembly, effective sealing of small leakage points or ring welds is achieved.
By dividing the sealing interval, the stress area of each sealing space is reduced, making tightening easier, and the leakage plugging effect is improved. It is suitable for leakage disposal of large-diameter and high-pressure pipelines.
Smart Images
Figure CN222911070U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of fixtures, in particular to a new large-diameter split fixture. Background Technique
[0002] During the operation of oil and gas pipelines, accidents such as breakage often occur. When there is a leak in the pipeline or a circumferential weld leak, a split fixture is used for emergency repair, which is time-saving, labor-saving and has good results.
[0003] In the prior art, when a large-diameter and high-pressure (about DN1000, about PN10MPa) has a punctiform or circumferential weld leak, a split fixture is mostly used for temporary leak plugging treatment (as Figure 1 shown). Its working principle is that the split fixture consists of upper and lower guard plates, circumferential seals, axial seals and bolts. It realizes the prevention of leakage by clamping and sealing with the upper and lower guard plates. However, when there is only one leak point or only a circumferential weld leak, due to the large sealing area inside the entire fixture, the force borne by the fixture is particularly large, and there is often a problem that it is difficult to fasten the fixture and the leakage cannot be plugged.
[0004] Therefore, it is very necessary to invent a new large-diameter split fixture. Summary of the Invention
[0005] For this reason, the utility model provides a new large-diameter split fixture, which divides the sealing interval of the fixture into multiple small sealing spaces. When there is only one leak point or a circumferential weld leak, the force-bearing area of the corresponding small sealing space is only a small interval, making the force reasonable and much easier to fasten, and greatly improving the leak plugging effect, so as to solve the problems raised in the above background technique.
[0006] In order to achieve the above object, the utility model provides the following technical solution: A new large-diameter split fixture, including two split flange clamps. First connection holes are opened at four corners of each of the split flange clamps, and a sealing mechanism is arranged between the two split flange clamps;
[0007] The sealing mechanism includes a fastening component, an axial sealing component and a circumferential sealing component. The axial sealing component is located inside the fastening component, and the circumferential sealing component is located on both sides of the axial sealing component.
[0008] Preferably, the fastening component includes several groups of split clamping plates. The split clamping plates are semi-circular. The number of split clamping plates in each group is two, and the two split clamping plates in the same group are respectively located inside the two split flange clamps.
[0009] Preferably, the fastening component further includes several second connection holes. The several second connection holes are symmetrically opened at the ends of the two split flange clamps. The second connection holes correspond to the split clamping plates one by one, and the second connection holes are located at both ends of the corresponding split clamping plates.
[0010] Preferably, the axial sealing assembly includes a plurality of groups of first split sealing rings. The first split sealing rings are semi-circular. The number of each group of first split sealing rings is two. The first split sealing rings and the split clamping plates correspond to each other one by one. The outer surface of the first split sealing ring is fixed on the inner surface of the corresponding split clamping plate.
[0011] Preferably, the circumferential sealing assembly includes a plurality of semi-circular grooves. The plurality of semi-circular grooves are symmetrically formed on the inner surfaces of two split flange clamps. The semi-circular grooves are symmetrically arranged on both sides of the split clamping plate. Second split sealing rings are fixed in the semi-circular grooves. The second split sealing rings are semi-circular. The plurality of second split sealing rings are symmetrically arranged at both ends of the first split sealing ring, and the surfaces of the second split sealing rings are in contact with the surfaces of the first split sealing rings.
[0012] Preferably, the circumferential sealing assembly further includes a plurality of annular pressing plates sleeved on the pipeline. The plurality of annular pressing plates and the plurality of groups of second split sealing rings correspond to each other one by one. The annular pressing plates are in contact with the corresponding second split sealing rings.
[0013] The beneficial effects of the present utility model are as follows: By the combined use of the split flange clamp, the first connection hole and the sealing mechanism, the sealing interval of the whole fixture can be divided into multiple small sealing spaces. When there is only one leakage point or the girth weld leaks, the axial sealing assembly and the circumferential sealing assembly at the corresponding leakage point or the leaking position of the girth weld can be tightened through the fastening assembly. That is, the force-bearing area of the corresponding small sealing space is only a small interval, making the force reasonable and much easier to tighten, greatly improving the leak plugging effect. The structure is simple, the operation is convenient, and it is suitable for popularization. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 is a structural schematic diagram of a large-diameter split fixture in the prior art;
[0015] Figure 2 is a structural schematic diagram for sealing the leakage point of pipeline A provided by the present utility model;
[0016] Figure 3 is a structural schematic diagram for sealing the leakage point of pipeline B provided by the present utility model.
[0017] In the figure: 1, split flange clamp; 2, first connection hole; 3, split clamping plate; 4, second connection hole; 5, first split sealing ring; 6, semi-circular groove; 7, second split sealing ring; 8, annular pressing plate. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0018] The preferred embodiments of the present utility model will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present utility model, and are not used to limit the present utility model.
[0019] Please refer to the attached Figures 1-3 , the novel large-diameter split clamp provided by the present utility model includes two split flange clamps 1. First connection holes 2 are provided at the four corners of the split flange clamps 1. That is, the operator can connect and fix the two split flange clamps 1 by passing bolts (not shown in the figure) through the first connection holes 2. A sealing mechanism is provided between the two split flange clamps 1. The sealing mechanism includes a fastening component, an axial sealing component and a circumferential sealing component. The axial sealing component is located inside the fastening component, and the circumferential sealing component is located on both sides of the axial sealing component;
[0020] The fastening component includes several groups of split clamping plates 3. The split clamping plates 3 are semi-circular. The number of split clamping plates 3 in each group is two. The two split clamping plates 3 in the same group are respectively located inside the two split flange clamps 1. The fastening component further includes several second connection holes 4. The several second connection holes 4 are symmetrically provided at the ends of the two split flange clamps 1. The second connection holes 4 correspond to the split clamping plates 3 one by one. The second connection holes 4 are located at both ends of the corresponding split clamping plates 3. Specifically, the operator can also fix the split flange clamps 1 by passing fixing bolts through different second connection holes 4, and apply a squeezing force to the split clamping plates 3 at different positions, that is, pressurize and fasten the split clamping plates 3 at the corresponding positions;
[0021] The axial sealing component includes several groups of first split sealing rings 5. The first split sealing rings 5 are semi-circular. The number of first split sealing rings 5 in each group is two. The first split sealing rings 5 correspond to the split clamping plates 3 one by one. The outer surface of the first split sealing rings 5 is fixed on the inner surface of the corresponding split clamping plates 3. Specifically, when the split clamping plates 3 at the corresponding positions are pressurized and fastened, the corresponding first split sealing rings 5 are subjected to a squeezing force, so as to fit the surface of the pipeline and seal the corresponding leakage points or the leakage positions of the circumferential welds of the pipeline;
[0022] The circumferential sealing assembly includes a number of semi-circular grooves 6 which are symmetrically arranged on the inner surfaces of two split flange clamps 1. The semi-circular grooves 6 are symmetrically disposed on both sides of the split clamping plate 3. Second split sealing rings 7 are fixed in the semi-circular grooves 6. The second split sealing rings 7 are semi-circular. A number of second split sealing rings 7 are symmetrically arranged at both ends of the first split sealing ring 5, and the surfaces of the second split sealing rings 7 are in contact with the surface of the first split sealing ring 5. The circumferential sealing assembly further includes a number of annular pressing plates 8 sleeved on the pipeline. The number of annular pressing plates 8 corresponds to the number of groups of second split sealing rings 7 one by one. The annular pressing plates 8 are in contact with the corresponding second split sealing rings 7. Specifically, when the split clamping plate 3 at the corresponding position is pressurized and tightened, the corresponding second split sealing ring 7 is squeezed. In cooperation with the annular pressing plate 8, it can perform circumferential sealing on the pipeline surfaces on both sides of the corresponding leakage point or the leakage position of the circumferential weld of the pipeline.
[0023] The using process of the present utility model is as follows: As Figure 2 shown, when there is a leakage point A in the pipeline, the operator first connects and fixes the split flange clamp 1 to the pipeline through the fixing bolts and the first connection holes 2, and then tightens the split clamping plate 3 corresponding to the leakage point A through the fixing bolts and the second connection holes 4 corresponding to the leakage point A. When the split clamping plate 3 corresponding to the leakage point A is pressurized and tightened, the corresponding first split sealing ring 5 is subjected to a squeezing force, so as to fit the pipeline surface and perform axial sealing on the leakage point A position of the pipeline. And when the split clamping plate 3 of the leakage point A is pressurized and tightened, the corresponding second split sealing ring 7 is squeezed. In cooperation with the annular pressing plate 8, it can perform circumferential sealing on the pipeline surfaces on both sides of the leakage point A position of the pipeline. Similarly, repeating the above operation can also seal the leakage point B of the pipeline, that is, the fixture can divide the sealing interval of the whole fixture into multiple small sealing spaces. When there is only one leakage point or leakage of the circumferential weld, the stress area of the corresponding small sealing space is only a small interval, making the stress reasonable and much easier to tighten, and greatly improving the leak stoppage effect.
[0024] The above is only a preferred embodiment of the present utility model. Any person skilled in the art can modify the present utility model by using the technical solutions described above or modify it into an equivalent technical solution. Therefore, any simple modification or equivalent replacement made according to the technical solution of the present utility model falls within the scope of protection required by the present utility model.
Claims
1. A novel large-caliber split clamp, comprising two split flange clamps (1), each of which has a first connecting hole (2) at four corners, characterized in that: A sealing mechanism is provided between the two split flange clamps (1); The sealing mechanism comprises a fastening assembly, an axial sealing assembly and an annular sealing assembly. The axial sealing assembly is located inside the fastening assembly, and the annular sealing assembly is located on both sides of the axial sealing assembly.
2. The novel large-diameter split clamp according to claim 1 is characterized in that: The fastening assembly comprises a plurality of groups of split-type clamps (3), wherein the split-type clamps (3) are semi-annular in shape, and each group of the split-type clamps (3) comprises two split-type clamps (3). The two split-type clamps (3) in the same group are respectively located on the inner sides of two split-type flange clamps (1).
3. The novel large-diameter split clamp according to claim 2 is characterized in that: The fastening assembly further comprises a plurality of second connection holes (4), wherein the plurality of second connection holes (4) are symmetrically arranged at the ends of the two split flange clamps (1), the second connection holes (4) correspond one to one with the split clamps (3), and the second connection holes (4) are located at both ends of the corresponding split clamps (3).
4. The novel large-diameter split clamp according to claim 3 is characterized in that: The axial sealing assembly comprises a plurality of groups of first split sealing rings (5), the first split sealing rings (5) being semi-annular, each group of the first split sealing rings (5) comprising two, the first split sealing rings (5) corresponding to the split clamping plates (3) respectively, and the outer surfaces of the first split sealing rings (5) being fixed to the inner surfaces of the corresponding split clamping plates (3).
5. The novel large-diameter split clamp according to claim 4 is characterized in that: The annular sealing assembly comprises a plurality of semi-annular grooves (6), wherein the plurality of semi-annular grooves (6) are symmetrically arranged on the inner surfaces of two split flange clamps (1), the semi-annular grooves (6) are symmetrically arranged on both sides of the split clamp plate (3), a second split sealing ring (7) is fixed in each of the semi-annular grooves (6), the second split sealing ring (7) is semi-annular, and the plurality of second split sealing rings (7) are symmetrically arranged at both ends of the first split sealing ring (5), and the surface of the second split sealing ring (7) is in contact with the surface of the first split sealing ring (5).
6. The novel large-diameter split clamp according to claim 5 is characterized in that: The annular sealing assembly further comprises a plurality of annular pressure plates (8) sleeved on the pipeline, the plurality of annular pressure plates (8) corresponding to a plurality of groups of second split sealing rings (7) respectively, and the annular pressure plates (8) abut against the corresponding second split sealing rings (7).