cavity chuck
By designing the cavity and compression components of the cavity clamp, the problem of long-term shutdowns required for pipeline maintenance was solved, enabling maintenance without downtime and fluid recirculation, thereby improving the operational efficiency and resource utilization of pipeline maintenance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LIAONING LIANHAI PETROCHEMICAL GRP CO LTD
- Filing Date
- 2025-09-12
- Publication Date
- 2026-07-07
AI Technical Summary
Existing technologies require prolonged shutdowns during pipeline maintenance, impacting operational efficiency and resulting in significant resource waste.
A cavity clamp was designed, including a cavity, an elliptical end cap, and a compression assembly. The cavity contacts the pipe to allow fluid to flow again, and the compression assembly forces the fluid into the pipe.
This allows for maintenance without stopping pipeline operation, ensuring operational efficiency and avoiding resource waste.
Smart Images

Figure CN224469937U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pipeline maintenance technology, specifically to cavity clamps. Background Technology
[0002] Pipeline maintenance is the work of maintaining and repairing pipeline systems, mainly involving the inspection, repair and routine maintenance of basic components such as pipes, valves and connectors.
[0003] However, current pipeline maintenance requires prolonged shutdown of the pipeline until repairs are completed, which impacts operational efficiency. Therefore, a cavity clamp was invented. Summary of the Invention
[0004] To solve the above-mentioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution:
[0005] A cavity clamp includes a cavity that contacts the surface of a pipe, and an elliptical end cap is fixedly mounted on the top of the cavity.
[0006] As a preferred embodiment of the cavity clamp described in this utility model, a reinforcing ring is provided at the bottom end of the cavity to improve the connection strength between the cavity and the pipe.
[0007] As a preferred embodiment of the cavity clamp described in this utility model, both ends of the outer side of the cavity are fixedly installed with lifting eye nuts.
[0008] As a preferred embodiment of the cavity clamp described in this utility model, it further includes:
[0009] A compression assembly for squeezing fluid in a cavity, and the compression assembly is located on an elliptical head.
[0010] In a preferred embodiment of the cavity clamp described in this utility model, the compression assembly includes:
[0011] A stud, which is threaded onto the middle part of the elliptical head;
[0012] A pressure plate, which is rotatably connected to the bottom of the stud and slidably connected in the cavity;
[0013] A drive plate, which is fixedly mounted on the top of the stud;
[0014] The telescopic rod is fixedly installed between the elliptical end cap and the pressure plate.
[0015] As a preferred embodiment of the cavity clamp described in this utility model, the side of the pressure plate is provided with a sealing ring, and the sealing ring is in close contact with the inner surface of the cavity.
[0016] As a preferred embodiment of the cavity clamp described in this utility model, the bottom end of the pressure plate is provided with an arc-shaped groove, and the arc-shaped groove matches the surface shape of the pipe.
[0017] Compared with existing technologies:
[0018] By incorporating cavities and chambers, maintenance of pipelines can be carried out without prolonged shutdowns, thus ensuring pipeline operating efficiency. Furthermore, by incorporating compression components, fluid can be reintroduced into the pipeline, preventing resource waste. Attached Figure Description
[0019] Figure 1 This is a front view schematic diagram of the structure of this utility model;
[0020] Figure 2 This is a side sectional view of the structure of this utility model;
[0021] Figure 3 This is a schematic diagram of the stud and drive plate structure of this utility model.
[0022] In the diagram: 1. Elliptical end cap; 2. Cavity; 3. Reinforcing ring; 4. Eye nut; 5. Stud; 6. Pressure plate; 7. Drive plate; 8. Telescopic rod. Detailed Implementation
[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.
[0024] This utility model provides a cavity clamp. Please refer to [link / reference]. Figures 1-3 The system includes a cavity 2 that contacts the surface of the pipe, with an elliptical end cap 1 fixedly installed on the top of the cavity 2. A reinforcing ring 3 is provided at the bottom of the cavity 2 to improve the connection strength between the cavity 2 and the pipe. Eye bolt nuts 4 are fixedly installed at both outer ends of the cavity 2.
[0025] It also includes a compression assembly for squeezing the fluid in the cavity 2, and the compression assembly is located on the elliptical head 1.
[0026] The compression assembly includes: stud 5, pressure plate 6, drive plate 7, and telescopic rod 8;
[0027] The stud 5 is threadedly connected to the middle of the elliptical end cap 1. The pressure plate 6 is rotatably connected to the bottom of the stud 5 and slidably connected in the cavity 2. The drive plate 7 is fixedly installed on the top of the stud 5. The telescopic rod 8 is fixedly installed between the elliptical end cap 1 and the pressure plate 6. The side of the pressure plate 6 is provided with a sealing ring, and the sealing ring is in close contact with the inner surface of the cavity 2. The bottom end of the pressure plate 6 is provided with an arc-shaped groove, and the arc-shaped groove matches the surface shape of the pipe.
[0028] In practical use, the specific operating steps for those skilled in the art are as follows:
[0029] S1: Remove the anti-corrosion layer, rust, and other foreign matter from the surface of the pipe to ensure smoothness;
[0030] S2: Place cavity 2 on the pipe, and make the leak point of the pipe located inside cavity 2;
[0031] S3: Use tools to make the cavity 2 and the pipe come into close contact, for example, by wrapping a rope around the pipe and connecting it to the eye nut 4, and keeping the rope taut. At this point, the flow in the pipe can be restored.
[0032] S4: First, weld cavity 2 onto the pipe, then weld reinforcing ring 3 between cavity 2 and the pipe;
[0033] S5: The pressure plate 6 is lowered by the drive plate 7 so that the pressure plate 6 presses down on the fluid in the cavity 2, thereby causing the fluid to flow back into the pipeline through the leak point.
[0034] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.
Claims
1. A cavity clamp, characterized in that, It includes a cavity (2) that contacts the surface of the pipe, and an elliptical end cap (1) is fixedly installed on the top of the cavity (2).
2. The cavity clamp according to claim 1, characterized in that, The bottom end of the cavity (2) is provided with a reinforcing ring (3) to improve the connection strength between the cavity (2) and the pipe.
3. The cavity clamp according to claim 1, characterized in that, Both ends of the outer side of the cavity (2) are fixedly installed with eye bolts (4).
4. The cavity clamp according to claim 1, characterized in that, Also includes: A compression assembly for squeezing fluid in the cavity (2), and the compression assembly is located on the elliptical head (1).
5. The cavity clamp according to claim 4, characterized in that, The compression component includes: Stud (5), which is threaded onto the middle part of the elliptical head (1); Pressure plate (6), which is rotatably connected to the bottom of stud (5) and slidably connected in cavity (2); Drive plate (7), which is fixedly mounted on the top of stud (5); Telescopic rod (8) is fixedly installed between elliptical end cap (1) and pressure plate (6).
6. The cavity clamp according to claim 5, characterized in that, The pressure plate (6) has a sealing ring on its side, and the sealing ring is in close contact with the inner surface of the cavity (2).
7. The cavity clamp according to claim 5, characterized in that, The bottom end of the pressure plate (6) is provided with an arc-shaped groove, and the arc-shaped groove matches the surface shape of the pipe.