CN220251602U - Sealing pressure test tool for large-diameter thin-wall light pipe - Google Patents

Abstract

The utility model discloses a sealing pressure test tool for a large-diameter thin-wall light pipe, which comprises the following components: the mandrel and the two groups of sealing structures are sleeved on the mandrel, and the two groups of sealing structures are respectively sealed between the two ends of the pressure test workpiece and the outer surface of the mandrel. The utility model can reduce the stress in the whole sealing pressure test tool by more than 80% through the design of the mandrel, greatly optimizes the stress structure of the tool, simplifies the stress checking and processing difficulty of main bearing components, greatly reduces the manufacturing cost of the tool, and simultaneously ensures the reliability and safety of the sealing pressure test tool.

Description

Sealing pressure test tool for large-diameter thin-wall light pipe

Technical Field

The utility model relates to the technical field of pressure test, in particular to a sealing pressure test tool for a large-diameter thin-wall light pipe.

Background

The pressure test experiment is the most effective means for carrying out raw material rechecking and checking equipment manufacturing quality on pipe fittings, instruments, valves, containers and the like, and is also the most main method for detecting the equipment bearing capacity. In the pressure test, it is important to ensure the sealing reliability, high efficiency and the rationality of the whole stress of the workpiece.

At present, for the sealing pressure test tool of the large-diameter thin-wall light pipe, because the axial stability of the large-diameter thin-wall light pipe is poor, and the body has no bearing structures such as flanges and threads, the sealing mode of an end face top clamp is not adopted, and the sealing tool is shown in the general form as shown in fig. 3:

by adopting the large-section stress frame 20 as a bearing member, the pressure test workpiece 10 is placed in the middle of the stress frame 20, the two ends are the axial sealing heads 60, the sealing filler 30 on the sealing heads 60 and the compression ring 50 are matched for sealing, the axial force of the high-pressure liquid to the sealing heads 60 is transmitted to the stress frame 20 by the support cushion block 70, the type of sealing tool is required to bear the section water pressure (namely the axial force) of the pressure test workpiece 10, and the water pressure can reach thousands of tons, so that the structural size is huge, the axial force is increased along with the increase of the diameter of a pipeline, the pressure test system is more complicated, and particularly, the material requirement strength of the stress frame 20 is high, the size and the weight are both great, the processing difficulty is extremely high, the cost is high, and in addition, the operation space is limited due to the fact that the pressure test workpiece 10 is placed in the stress frame 20, the positioning operation of the sealing heads 60, the operation of installing a strain sensor and other operations are not facilitated.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model aims to provide a sealing pressure test tool for a large-diameter thin-wall light pipe.

The utility model adopts the following technical scheme to realize the aim:

a sealed pressure testing frock for major diameter thin wall light pipe includes:

the mandrel is positioned in the pressure test workpiece, an annular cavity is formed between the mandrel and the pressure test workpiece, and a water inlet pipe communicated with the annular cavity is arranged on the inner side of the mandrel;

the two groups of sealing structures are sleeved on the mandrel and respectively sealed between the two ends of the pressure test workpiece and the outer surface of the mandrel.

Further, the sealing structure comprises a sealing filler, a supporting ring and a positioning ring which are sleeved on the mandrel from the annular chamber to the outside in sequence.

Further, a U-shaped ring groove is formed in one side, away from the supporting ring, of the sealing filler.

Further, an annular groove is formed in the mandrel, and the positioning ring can be installed in the annular groove.

Further, the diameter of the positioning ring is not smaller than the diameter of the pressure test workpiece.

Further, an outer exhaust pipe communicated with the annular cavity is arranged at the top of one end in the mandrel.

Further, a guide wheel is mounted on the mandrel, and the guide wheel is located in the annular cavity.

Compared with the prior art, the utility model provides a sealing pressure test tool for a large-diameter thin-wall light pipe, which has the following beneficial effects:

the utility model cancels the traditional tool structure, adopts the mandrel, reduces the filling amount of liquid in the pressure test workpiece, reduces the axial force generated by high-pressure liquid, reduces the sectional area of pressure bearing in the pressure test workpiece, does not influence the pressure bearing state in the pressure test workpiece, seals the two ends of the pressure test workpiece and the outer surface of the mandrel through the sealing structure, ensures the pressure test effect, reduces the stress in the whole sealing pressure test tool by more than 80 percent through the design of the tool, greatly optimizes the stress structure of the tool, simplifies the stress check and processing difficulty of main bearing components, greatly reduces the manufacturing cost of the tool, and simultaneously ensures the reliability and safety of the sealing pressure test tool.

Drawings

FIG. 1 is a schematic cross-sectional view of the present utility model;

FIG. 2 is an enlarged schematic view of the structure of FIG. 1 at A;

fig. 3 is a schematic structural diagram of a conventional pressure test tool.

The mark in the figure is 1, the mandrel; 11. an annular groove; 2. a sealing structure; 21. a support ring; 22. a positioning ring; 3. an annular chamber; 4. a water inlet pipe; 5. an outer tube; 6. a guide wheel; 10. testing the pressure of the workpiece; 20. a stress frame; 30. sealing filler; 301. a U-shaped ring groove; 40. a guide rod; 50. a clamp ring; 60. sealing the end socket; 70. and (5) supporting the cushion block.

Detailed Description

The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:

standard parts used in the utility model can be purchased from the market, special-shaped parts can be customized according to the description of the specification and the drawings, the specific connection modes of all parts adopt conventional means such as mature bolts, rivets and welding in the prior art, the machinery, the parts and the equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection modes in the prior art, so that the details are not described.

It should be noted that the positional or positional relationship indicated by the terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying positive importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

The embodiment of the utility model provides a sealing pressure test tool for a large-diameter thin-wall light pipe, and referring to FIG. 1, the tool comprises: the pressure testing device comprises a mandrel 1 and two groups of sealing structures 2, wherein the mandrel 1 is positioned in a pressure testing workpiece 10, two ends of the mandrel 1 extend out of two ends of the pressure testing workpiece 10, an annular chamber 3 is formed between the mandrel 1 and the pressure testing workpiece 10, a water inlet pipe 4 communicated with the annular chamber 3 is arranged on the inner side of the mandrel 1, and the two groups of sealing structures 2 are sleeved on the mandrel 1 and respectively sealed between two ends of the pressure testing workpiece 10 and the outer surface of the mandrel 1.

The mandrel 1 is hollow and has the same shape as the pressure test workpiece 10, in the embodiment, the mandrel 1 is in a cylindrical shape with the hollow inside, and the pressure test workpiece 10 is positioned by arranging the mandrel 1, so that the filling amount of liquid in the pressure test workpiece 10 is reduced, the axial force generated by high-pressure liquid is reduced, the pressure bearing sectional area in the pressure test workpiece 10 is reduced, and the pressure bearing state in the pressure test workpiece 10 is not influenced; by arranging the sealing structure 2, the two ends of the pressure test workpiece 10 and the outer surface of the mandrel 1 are sealed, so that the pressure test effect is ensured; the axial force generated by the high-pressure liquid is the thrust from inside to outside (or from inside to both sides of the pressure test workpiece 10) received by the cross section area of the annular chamber 3.

Specifically, the pressure test workpiece 10 is a large-diameter thin-wall light pipe, and is made of steel pipe or other nonmetallic pipe (such as glass fiber reinforced plastic, carbon fiber, ceramic pipe and the like;

water is injected into the annular chamber 3 through the water inlet pipe 4, specifically, the water inlet pipe 4 is positioned at the bottom of one end of the mandrel 1 and is communicated with the annular chamber 3.

Referring to fig. 1 and 2, in this embodiment, the sealing structure 2 includes a sealing filler 30, a supporting ring 21, and a positioning ring 22 sleeved on the mandrel 1 sequentially from inside to outside of the annular chamber 3.

Sealing both ends of the pressure test workpiece 10 by the sealing filler 30; the sealing filler 30 is supported and protected through the supporting ring 21, so that the service life of the sealing filler 30 is longer and the sealing effect is better; the sealing packing 30 and the supporting ring 21 are positioned on the mandrel 1 through the positioning ring 22, so that the sealing packing 30 and the supporting ring 21 are prevented from being pushed out by axial force;

typically the sealing filler 30 is a soft material; the support ring 21 is a hard material.

Referring to fig. 1 and 2, in the present embodiment, a U-shaped ring groove 301 is provided on a side of the sealing packing 30 away from the support ring 21.

Through setting up at U-shaped annular 301, the axial force that provides through high-pressure liquid extrudes U-shaped annular 301 both sides for sealing packing 30 warp, seals the inner wall of pressure testing work piece 10 and the surface of dabber 1, reaches sealed effect.

Referring to fig. 1 and 2, in this embodiment, the mandrel 1 is provided with an annular groove 11, and the positioning ring 22 can be mounted in the annular groove 11.

Specifically, the positioning ring 22 is composed of two semicircular rings, and the positioning ring 22 is fixed by the annular groove 11.

Referring to fig. 1 and 2, in the present embodiment, the diameter of the positioning ring 22 is not smaller than the diameter of the pressure test workpiece 10.

Through the setting that the diameter of holding ring 22 is not less than the diameter of pressure testing work piece 10, when installing pressure testing work piece 10, carry out spacing to pressure testing work piece 10 through holding ring 22, make things convenient for pressure testing work piece 10's installation.

Specifically, the sealing filler 30 bears the thrust (i.e. axial force) of the cross section area of the annular chamber 3 from inside to outside, the thrust acts on the supporting ring 21, the supporting ring 21 bears the thrust of the sealing filler 30 from inside to outside and is supported by the positioning ring 22, because the positioning ring 22 is fixed on the mandrel 1 through the annular groove 11, the positioning ring 22 gives the mandrel 1 the thrust of the mandrel from inside to outside, the stress structure of the tool is greatly optimized, and the stress check and the processing difficulty of the main bearing member are simplified.

Referring to fig. 1 and 2, in this embodiment, the mandrel 1 is further provided inside with an outer tube 5 communicating with the annular chamber 3.

Specifically, the top of one end of the outer drain pipe 5 in the mandrel 1 is communicated with the annular chamber 3, and is matched with the water inlet pipe 4 arranged at the bottom of one end of the mandrel 1, so that whether the annular chamber 3 is full of water or not can be conveniently judged; the outer exhaust pipe 5 can exhaust gas or drain water, a valve is arranged on the outer exhaust pipe 5, the initial state of the valve is an open state, gas in the annular chamber 3 is exhausted through the outer exhaust pipe 5 when the water is injected into the water inlet pipe 4, and whether the annular chamber 3 is full of water can be judged by observing whether water exists at the outlet of the outer exhaust pipe 5; during pressure relief, the valve can be opened to drain water through the outer drain pipe 5.

Referring to fig. 1, in this embodiment, a guide wheel 6 is mounted on the mandrel 1, and the guide wheel 6 is located in the annular chamber 3.

The guide wheels 6 are arranged, so that the mandrel 1 can better position the pressure test workpieces 10, the guide wheels 6 are arranged in a plurality of ways and can be arranged on one side of the mandrel 1 and can also be arranged on the periphery of the mandrel 1, the guide wheels 6 are determined according to the characteristics of the pressure test workpieces 10, and the guide wheels 6 are mainly configured when the pressure test workpieces 10 are thin or the specificity of the pressure test workpieces 10 is required to be higher in guide precision.

The axis of the pressure test workpiece 10 and the axis of the mandrel 1 are the same.

Specifically, the water inlet pipe 4 is connected with pressure testing equipment, the pressure testing equipment is provided with a pressure gauge, and whether the annular chamber 3 is full of water can be judged by observing the pressure change in the pressure testing workpiece 10 through the pressure appearance; after the pressure is released to normal pressure, if the normal pressure water in the annular chamber 3 is required to be further discharged, the annular chamber is required to work through other devices on the pressure testing equipment, and is discharged from the water inlet pipe 4 below the pressure testing workpiece 10; the water inlet and outlet and the pressure increase and decrease can be regulated by the pressure test equipment according to the working condition and design principle; the pressure test apparatus is a complete set of devices for controlling the internal pressure of the pressure test workpiece 10, including presses, valves, meters, water circulation systems, and other accessories.

Working principle: when the pressure test device is used, the positioning ring 22, the supporting ring 21 and the sealing filler 30 are sequentially arranged on one side of the mandrel 1, the pressure test workpiece 10 is pushed to be in contact with the end face of the positioning ring 22 along the axis of the mandrel 1 from the other side of the mandrel 1, the sealing filler 30, the supporting ring 21 and the positioning ring 22 are sequentially arranged on the other end of the pressure test workpiece 10, so that the sealing filler 30 forms a seal between the outer surface of the mandrel 1 and the inner wall of the pressure test workpiece 10, and water is injected into the annular chamber 3 through the water inlet pipe 4 to test the pressure;

after the pressure test is finished, the pressure is released through the outer drain pipe 5, after all water is discharged, the positioning ring 22, the supporting ring 21 and the sealing packing 30 at one end of the mandrel 1 are disassembled, and then the pressure test workpiece 10 is taken out, so that the disassembly is convenient;

the utility model has simple structure and low cost, and the pressure test workpiece 10 can be quickly installed;

the utility model cancels the traditional tool structure, adopts the mandrel 1, reduces the filling quantity of liquid in the pressure test workpiece 10, reduces the axial force generated by high-pressure liquid, reduces the sectional area of pressure bearing in the pressure test workpiece 10, does not influence the pressure bearing state in the pressure test workpiece 10, and through the design of the tool, the mandrel 1 can reduce the stress in the whole sealed pressure test tool by more than 80 percent, greatly optimizes the stress structure of the tool, simplifies the stress checking and processing difficulty of main bearing components, greatly reduces the manufacturing cost of the tool, and simultaneously ensures the reliability and safety of the sealed pressure test tool.

What is not described in detail in this specification is prior art known to those skilled in the art.

The above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the scope of the present utility model. It will be apparent that the described embodiments are merely some, but not all, embodiments of the utility model. Based on these embodiments, all other embodiments that may be obtained by one of ordinary skill in the art without inventive effort are within the scope of the utility model. Although the present utility model has been described in detail with reference to the above embodiments, those skilled in the art may still combine, add or delete features of the embodiments of the present utility model or make other adjustments according to circumstances without any conflict, so as to obtain different technical solutions without substantially departing from the spirit of the present utility model, which also falls within the scope of the present utility model.

Claims (7)

1. A sealed pressure testing frock for major diameter thin wall light pipe, its characterized in that includes:

the pressure testing device comprises a mandrel (1), wherein the mandrel (1) is positioned in a pressure testing workpiece (10), an annular cavity (3) is formed between the mandrel (1) and the pressure testing workpiece (10), and a water inlet pipe (4) communicated with the annular cavity (3) is arranged on the inner side of the mandrel (1);

the two groups of sealing structures (2) are sleeved on the mandrel (1), and are respectively sealed between the two ends of the pressure test workpiece (10) and the outer surface of the mandrel (1).

2. The sealing pressure test tool for the large-diameter thin-wall light pipe according to claim 1, wherein the sealing structure (2) comprises a sealing filler (30), a supporting ring (21) and a positioning ring (22) which are sequentially sleeved on the mandrel (1) from the inside of the annular chamber (3) to the outside.

3. The sealing pressure test fixture for the large-diameter thin-wall light pipe according to claim 2, wherein a U-shaped ring groove (301) is arranged on one side of the sealing filler (30) away from the supporting ring (21).

4. The sealing pressure test tool for the large-diameter thin-wall light pipe according to claim 2, wherein the mandrel (1) is provided with an annular groove (11), and the positioning ring (22) can be installed in the annular groove (11).

5. The sealing pressure test fixture for large diameter thin wall light pipes as claimed in claim 4, wherein the diameter of the positioning ring (22) is not smaller than the diameter of the pressure test workpiece (10).

6. The sealing pressure test tool for the large-diameter thin-wall light pipe according to claim 1, wherein an outer drain pipe (5) communicated with the annular chamber (3) is further arranged on the inner side of the mandrel (1).

7. The sealing pressure test tool for the large-diameter thin-wall light pipe according to claim 1, wherein a guide wheel (6) is mounted on the mandrel (1), and the guide wheel (6) is located in the annular chamber (3).