Sealing device for steam turbine small pipeline pressure test

Abstract

The utility model discloses a sealing device for a steam turbine small pipeline pressure test, which belongs to the field of steam turbine pipeline pressure tests and comprises a top plate, a connecting assembly, a jacking assembly and an airtight sealing gasket with certain flexibility, and the jacking assembly is mounted on a pipeline through the connecting assembly; the jacking assembly comprises a position-adjustable jacking rod, and the sealing gasket is arranged between the opening end of the pipeline and the jacking plate; by adjusting the position of the ejector rod, the end of the ejector rod extrudes the ejector plate, and the sealing gasket abuts against the opening end of the pipeline; the top plate is extruded through the end of the ejector rod, so that the sealing gasket tightly abuts against the opening end of the pipeline, sealing of the opening end of the pipeline is achieved, the connecting assembly and the jacking assembly are both assembled through an assembly type structure or act on the pipeline, and operation such as mounting and dismounting is convenient.

Description

Technical Field

[0001] The utility model belongs to the field of steam turbine pipeline pressure test, in particular to a sealing device for steam turbine small pipeline pressure test. Background Art

[0002] The steam turbine pipeline pressure test is an important part of ensuring the safe operation of the pipeline. The purpose of the pressure test is to test the strength and tightness of the pipeline, to find potential defects and problems in time, to ensure that no dangerous situations such as leakage and rupture will occur in the subsequent operation, and to ensure the safe and reliable operation of the steam turbine system.

[0003] For pipes that need to undergo pressure tests, the pipe end faces are usually sealed with welding, and the excess part can be cut off after the pressure test; or the pipe ends are processed with threads, and the pipe end faces are sealed with threads, and pressure tests can also be performed. When the pipe pressure test has been considered in the early design, the pipe end face sealing welding can be considered, but for the already formed pipes, when the pipe pressure test is temporarily added, the pipe cannot be destroyed because the pipe size is already in place, and only a new pipe can be produced.

[0004] Therefore, a device is needed to perform pipeline pressure testing, which can seal the pipeline end face without damaging the pipeline. Utility Model Content

[0005] The embodiment of the utility model provides a sealing device for pressure testing of a small pipeline of a steam turbine to solve the problems in the prior art.

[0006] The utility model adopts the following technical scheme: a sealing device for pressure testing of a small pipeline of a steam turbine, used for sealing the open end of the pipeline, comprising a top plate, a connecting assembly, a top pressure assembly and a sealing gasket with certain flexibility and airtightness, wherein the top pressure assembly is installed on the pipeline through the connecting assembly; the top pressure assembly comprises a push rod with adjustable position, and the sealing gasket is placed between the open end of the pipeline and the top plate; by adjusting the position of the push rod, the end of the push rod presses the top plate and presses the sealing gasket against the open end of the pipeline;

[0007] The top plate is squeezed by the end of the push rod, so that the sealing gasket is tightly pressed against the open end of the pipe to achieve sealing of the open end of the pipe. In addition, the connecting components and the top pressure components are assembled or act on the pipe using an assembled structure, which is convenient for installation, disassembly and other operations.

[0008] Preferably, the connection assembly comprises an upper pipe clamp and a lower pipe clamp, and the upper pipe clamp and the lower pipe clamp are assembled on the pipeline and fixed by a bolt assembly.

[0009] Preferably, the pressing assembly further includes a push block and two pull blocks, each of the two ends of each pull block being provided with an inwardly inclined bending portion; a first inner bevel is formed at one end of the upper tube clamp away from the pipe opening, a second inner bevel is formed at one end of the push block away from the pipe opening, and the two bending portions of one pull block respectively cooperate with the first inner bevel and the second inner bevel; a third inner bevel is formed at one end of the lower tube clamp away from the pipe opening, a fourth inner bevel is also formed at one end of the push block away from the pipe opening, and the two bending portions of the other pull block respectively cooperate with the third inner bevel and the fourth inner bevel; an internal threaded hole is formed at the center of the push block and passes through its body, an external thread is formed on the outer peripheral wall of the push rod, and the push rod is threadedly connected to the internal threaded hole via the external thread.

[0010] Preferably, the end of the push rod close to the pipeline opening is configured as a cone head.

[0011] Preferably, a lever extending in its radial direction is installed at one end of the push rod away from the pipeline opening to facilitate the rotation of the push rod.

[0012] Preferably, the sealing gasket is made of rubber or plastic to ensure that it can fit tightly against the pipe opening to ensure sealing.

[0013] At least one of the above technical solutions adopted in the embodiment of the utility model can achieve the following beneficial effects:

[0014] The utility model installs a connecting component on the pipeline to ensure the relative position of the pressing component and the pipeline, and then adjusts the position of the push rod in the pressing component so that the end of the push rod presses the top plate, and the top plate then presses and gradually presses the sealing gasket, so that the sealing gasket is tightly pressed against the open end of the pipeline to achieve sealing of the open end of the pipeline, and the connecting component and the pressing component are both assembled or act on the pipeline with an assembled structure, which is convenient for installation, disassembly and the like. In addition, the sealing device is used without destroying the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0016] Figure 1 It is the assembly drawing of the utility model;

[0017] Figure 2 It is an exploded view of the utility model;

[0018] Figure 3 It is a side view of the upper pipe clamp of the utility model;

[0019] Figure 4It is an assembly diagram of the push rod and the lever of the utility model;

[0020] Reference numerals

[0021] 1-top plate; 2-connecting assembly; 21-upper pipe clamp; 211-first inner bevel; 212-mounting hole; 22-lower pipe clamp; 221-third inner bevel; 23-bolt assembly; 24-screw; 25-tube clamp nut; 3-top pressure assembly; 31-top rod; 311-external thread; 312-cone head; 32-top block; 321-second inner bevel; 322-fourth inner bevel; 323-internal threaded hole; 33-pull block; 331-bending part; 34-lever; 341-perforation; 342-threaded end; 35-lever nut; 4-sealing gasket; 5-pipeline. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in combination with the specific embodiments of the utility model and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] The technical solutions provided by various embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0024] Reference Figures 1 to 4 As shown, the embodiment of the utility model provides a sealing device for pressure testing of a small pipeline of a steam turbine, which is used to seal the open end of a pipeline 5, and comprises a top plate 1, a connecting assembly 2, a top pressure assembly 3 and a sealing pad 4 with certain flexibility and airtightness, wherein the sealing pad 4 is made of rubber or plastic material; the top pressure assembly 3 is installed on the pipeline 5 through the connecting assembly 2; the top pressure assembly 3 comprises an adjustable push rod 31, and the sealing pad 4 is placed between the open end of the pipeline 5 and the top plate 1; by adjusting the position of the push rod 31, the end of the push rod 31 is pressed against the top plate 1, and the sealing pad 4 is pressed against the open end of the pipeline 5;

[0025] In this embodiment, a layer of sealing gasket 4 is laid in advance on the open end of the pipe 5 without a positioning method. The sealing gasket 4 can be made of rubber or plastic material to ensure that it can fit tightly on the opening of the pipe 5 to ensure sealing. Then, the connecting component 2 is installed on the pipe 5 to ensure the relative position of the pressing component 3 and the pipe 5. Then, by adjusting the position of the push rod 31 in the pressing component 3, the end of the push rod 31 squeezes the top plate 1, and the top plate 1 squeezes and gradually tightens the sealing gasket 4, so that the sealing gasket 4 is tightly pressed against the open end of the pipe 5 to achieve sealing of the open end of the pipe 5. In addition, the connecting component 2 and the pressing component 3 are both assembled or act on the pipe 5 using an assembled structure, which is convenient for installation, disassembly and other operations.

[0026] Specifically, Figure 2 and Figure 3 As shown, the connection assembly 2 includes an upper pipe clamp 21 and a lower pipe clamp 22. The upper pipe clamp 21 and the lower pipe clamp 22 are both prior arts, and can refer to a clamp-type pipe clamp, which has an inner arc surface matching the outer wall of the pipe 5. The upper pipe clamp 21 and the lower pipe clamp 22 are assembled on the pipe 5 and fixed by a bolt assembly 23; specifically, both ends of the upper pipe clamp 21 and the lower pipe clamp 22 are provided with mounting holes 212, and the connection between the upper pipe clamp 21 and the lower pipe clamp 22 is achieved by a screw 24 and a pipe clamp nut 25, so that the upper pipe clamp 21 and the lower pipe clamp 22 are fixedly installed on the pipe 5 to be tested, and the upper pipe clamp 21 and the lower pipe clamp 22 are easy to disassemble and install, and also have certain stability.

[0027] like Figure 1 and Figure 2 As shown, the top pressing assembly 3 also includes a top block 32 and two pull blocks 33, and both ends of each pull block 33 are provided with an inwardly inclined bending portion 331; the end of the upper pipe clamp 21 away from the opening of the pipe 5 is formed with a first inner bevel 211, and the end of the top block 32 away from the opening of the pipe 5 is formed with a second inner bevel 321, and the two bevels 331 of one pull block 33 are matched with the first inner bevel 211 and the second inner bevel 321 respectively; the end of the lower pipe clamp 22 away from the opening of the pipe 5 is formed with a third inner bevel 221, and the end of the top block 32 away from the opening of the pipe 5 is also formed with a fourth inner bevel 322, and the two bevels 331 of the other pull block 33 are matched with the third inner bevel 221 and the fourth inner bevel 322 respectively;

[0028] An internal threaded hole 323 penetrating the main body of the top block 32 is formed at the center thereof, and an external thread 311 is formed on the outer peripheral wall of the top rod 31 . The top rod 31 is threadedly connected to the internal threaded hole 323 via the external thread 311 .

[0029] In this embodiment, the upper pipe clamp 21 and the lower pipe clamp 22 are fixed and pressed on the pipe 5 by the bolt assembly 23, so that the first inner bevel 211 of the upper pipe clamp 21 and the third inner bevel 221 of the lower pipe clamp 22 can form a force-applying surface with a certain tensile strength, and then the upper pipe clamp 21, the lower pipe clamp 22 and the upper block 32 are matched with the inner bevels to achieve the initial positioning of the upper block 32. At this time, the upper block 32 is directly opposite to and placed on the upper pipe clamp 21 and the lower pipe clamp 22. At the front side of the open end of the pipe 5, the top block 32 is lifted up by the staff to be temporarily stabilized, and then the staff rotates the top rod 31 located in the internal threaded hole 323, so that the top rod 31 can gradually press the top plate 1, and press the sealing gasket 4 against the open end of the pipe 5 to achieve the sealing of the opening of the pipe 5. After the sealing gasket 4 is pressed, under the pulling action of the bent portion 331 of the pull block 33, the top pressing assembly 3 is not easy to fall off, and the top pressing assembly 3 is a detachable structure as a whole, with a simple structure and easy installation and disassembly.

[0030] Specifically, one end of the push rod 31 close to the opening of the pipe 5 is configured as a cone head 312 , and the cone head 312 is a pressing portion of the push rod 31 .

[0031] Specifically, Figure 1 and Figure 4 As shown, a lever 34 extending in the radial direction is installed at one end of the push rod 31 away from the opening of the pipe 5, and the push rod 31 is conveniently rotated by turning the lever 34 by a worker;

[0032] First, the lever 34 can be installed on the top rod 31 in a fixed connection manner;

[0033] Secondly, the push rod 31 is detachably connected to the push rod 31. Specifically, a through hole 341 is opened at the outer end of the push rod 31 for the lever 34 to pass through, and then both ends of the lever 34 are configured as threaded ends 342 and are equipped with lever nuts 35 for limiting the lever and preventing the lever 34 from falling off from the through hole 341.

[0034] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A sealing device for a small steam turbine pipeline pressure test, used for sealing the open end of a pipeline (5), characterized in that: It comprises a top plate (1), a connecting component (2), a top pressing component (3) and a sealing pad (4) having a certain flexibility and being airtight, wherein the top pressing component (3) is installed on a pipeline (5) through the connecting component (2); The push-pressing assembly (3) comprises a push rod (31) with an adjustable position, and the sealing gasket (4) is placed between the open end of the pipe (5) and the top plate (1); by adjusting the position of the push rod (31), the end of the push rod (31) presses the top plate (1) and presses the sealing gasket (4) against the open end of the pipe (5).

2. A sealing device for a small steam turbine pipeline pressure test according to claim 1, characterized in that: The connection assembly (2) comprises an upper pipe clamp (21) and a lower pipe clamp (22), wherein the upper pipe clamp (21) and the lower pipe clamp (22) are assembled on the pipeline (5) and fixed by a bolt assembly (23).

3. A sealing device for a small steam turbine pipeline pressure test according to claim 2, characterized in that: The pressing assembly (3) further comprises a top block (32) and two pull blocks (33), and both ends of each pull block (33) are provided with an inwardly inclined bending portion (331); The end of the upper pipe clamp (21) away from the opening of the pipe (5) is formed with a first inner bevel (211), the end of the top block (32) away from the opening of the pipe (5) is formed with a second inner bevel (321), and the two bent portions (331) of one of the pull blocks (33) are respectively matched with the first inner bevel (211) and the second inner bevel (321); The end of the lower pipe clamp (22) away from the opening of the pipe (5) is formed with a third inner bevel (221), the end of the top block (32) away from the opening of the pipe (5) is also formed with a fourth inner bevel (322), and the two bent portions (331) of the other pull block (33) are respectively matched with the third inner bevel (221) and the fourth inner bevel (322); An internal threaded hole (323) penetrating the main body of the top block (32) is formed at the center thereof, an external thread (311) is formed on the outer peripheral wall of the top rod (31), and the top rod (31) is threadedly connected to the internal threaded hole (323) via the external thread (311).

4. A sealing device for a small steam turbine pipeline pressure test according to claim 3, characterized in that: One end of the push rod (31) close to the opening of the pipeline (5) is configured as a cone head (312).

5. A sealing device for a small steam turbine pipeline pressure test according to claim 3, characterized in that: A lever (34) extending in the radial direction is installed at one end of the push rod (31) away from the opening of the pipeline (5).

6. A sealing device for a small steam turbine pipeline pressure test according to claim 1, characterized in that: The sealing pad (4) is made of rubber or plastic.

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