CN212410282U

CN212410282U - Novel bellows life test platform

Info

Publication number: CN212410282U
Application number: CN202020829641.9U
Authority: CN
Inventors: 李勇健; 田青华; 丁平西
Original assignee: Nanjing Puyikang Intelligent Technology Co ltd
Current assignee: Nanjing Puyikang Intelligent Technology Co ltd
Priority date: 2020-05-18
Filing date: 2020-05-18
Publication date: 2021-01-26
Anticipated expiration: 2030-05-18

Abstract

The utility model discloses a novel corrugated pipe service life test bed, which comprises an operation platform, a corrugated pipe assembly and a test assembly, wherein the corrugated pipe assembly and the test assembly are arranged on the operation platform, the corrugated pipe assembly consists of two corrugated pipes with one side ports communicated, the opposite ends of the two corrugated pipes are fixedly connected through a connecting assembly, the test assembly comprises a sealing cavity arranged on the operation platform and two telescopic driving mechanisms, the corrugated pipe assembly penetrates through the sealing cavity and both ends of the corrugated pipe assembly are communicated with the atmosphere, the two telescopic driving mechanisms are respectively arranged at both sides of the sealing cavity, and the output shaft of the telescopic driving mechanism extends into the corrugated pipe and is connected with the connecting component, the device is detachably connected with the corrugated pipe component, the assembly and disassembly are convenient, during telescopic detection, the pressure in the sealed cavity is always stabilized on a rated value, an energy accumulator and a voltage stabilizer are not needed, the sealed cavity is efficient and practical, and the tested service life times are more accurate.

Description

Novel bellows life test platform

Technical Field

The utility model relates to a corrugated metal pipe technical field, concretely relates to novel bellows life-span test bench.

Background

The corrugated pipe is a tubular elastic sensitive element which is formed by connecting foldable corrugated sheets along the folding and stretching direction. The corrugated pipe has wide application in instruments and meters, and is mainly used as a measuring element of a pressure measuring instrument to convert pressure into displacement or force. One type of bellows is subjected to riser pressure during operation. Such as valves, high pressure gas-filled switch cabinets, etc. An engineer puts forward specific technical requirements on the axial expansion service life times of the corrugated pipe under the condition of bearing external pressure during design. In a conventional bellows life test bench, a bellows is placed in a closed container filled with rated pressure (the inner cavity of the bellows is vented to the atmosphere), and then the bellows is subjected to an axial compression and tensile test.

Since the bellows contracts in volume when compressed (fig. 1a) and expands in volume when stretched (fig. 1b), the volume in the container fluctuates, causing fluctuations in the nominal pressure. Although the reservoir is equipped with a pressure accumulator or stabilizer, the stability of the pressure during rapid movement of the bellows is not as desired. The service life times of the corrugated pipe tested in the way are not accurate enough. The situation becomes the bottleneck of the development of the corrugated pipe industry in China to the high-end market, and the corrugated pipe for the key project still needs to be imported from abroad. To this end, the present application provides a novel bellows life test bench.

Disclosure of Invention

The purpose of the invention is as follows: an object of the utility model is to prior art not enough, provide a novel bellows life-span test bench, it can dismantle with bellows subassembly and be connected, and it is convenient to load and unload, and flexible time measuring is examined, and seal chamber internal pressure is stabilized on rated value always, need not adorn energy storage ware and stabiliser, and is high-efficient practical, and the life-span number of times that tests out is more accurate.

The utility model provides a novel bellows life test bench, which comprises an operation panel, arrange the bellows subassembly on the operation panel in, the test component, the bellows subassembly comprises the bellows of two one side port intercommunications, two bellows are held in opposite directions and are linked firmly through coupling assembling, the test component is including locating seal chamber and two flexible actuating mechanism on the operation panel, the bellows subassembly runs through seal chamber and sets up and both ends and atmosphere intercommunication, two flexible actuating mechanism are located the seal chamber both sides respectively, and flexible actuating mechanism output shaft extends to in the bellows and links to each other with coupling assembling.

As a further improvement of the utility model: the connecting assembly comprises a connecting ring, an inner ring edge and a connecting rod, the inner ring edge is fixedly arranged on the inner ring wall of the connecting ring, the connecting rod is fixedly arranged between the inner ring edge and the inner wall, and output shafts of the two telescopic driving mechanisms are respectively connected with two side faces of the connecting rod.

As a further improvement of the utility model: the connecting rod is arranged along the circle center through the inner ring and is a diameter rod.

As a further improvement of the utility model: rubber gaskets are arranged on the inner wall of the connecting ring and the outer wall of the annular edge, and the cross section of each rubber gasket is L-shaped.

As a further improvement of the utility model: and a sealing ring is arranged at the penetrating connection part of the corrugated pipe assembly and the sealing cavity.

Has the advantages that:

1. the utility model discloses compare in traditional single bellows detection, the bellows subassembly that the rational improvement was two combinations detects together, has not only improved detection efficiency, and flexible moreover examines time measuring, and seal chamber internal pressure is stable always on rated value, need not adorn energy storage ware and stabiliser, and is high-efficient practical, and the life-span number of times that the test was come out is more accurate.

2. The test device and the corrugated pipe assembly are detachably connected through the connecting assembly, the mounting and the dismounting are convenient, the connecting ring can adopt the conventional hoop structure, the corrugated pipes on two sides are integrated and fixedly connected, the connecting assembly is located on the circular cross section of the corrugated pipe assembly, and during use, the output shaft of the telescopic driving mechanism extends into the corrugated pipe and is connected with the connecting rod. The side wall of the connecting rod is correspondingly provided with a hole groove or a connecting piece which is in adaptive connection with the output shaft.

3. The utility model provides a bellows subassembly, in the test process, during A bellows compression, then another B bellows is lengthening simultaneously, and when the connecting rod moved right, otherwise, the compression of B bellows, A bellows are lengthening simultaneously. The two corrugated pipes have the same size and occupy the same space in the container, A contracts and B elongates simultaneously, B contracts and A elongates simultaneously, the two corrugated pipes move oppositely simultaneously, the space in the container is not increased or reduced, the volume in the container cannot be changed (figure 2), and therefore the indication of the pressure gauge outside the container is stable. Experiments prove that the corrugated pipe performs repeated axial movement under the condition of stable external bearing pressure, and the tested service life times are accurate.

Drawings

FIG. 1 is a diagram illustrating a state of a conventional bellows during a stretching test, in which FIG. 1a is a compressed state and FIG. 1b is a stretched state;

FIG. 2 is a state diagram of the bellows expansion test of the present invention;

FIG. 3 is a schematic structural view of the present invention;

fig. 4 is a schematic view of the connection assembly of the present invention;

in the figure: the device comprises a 1 bellows assembly, 11 bellows, a 2 test assembly, a 21 sealed cavity, a 22 telescopic driving mechanism, a 3 connecting assembly, a 31 connecting ring, a 32 inner ring edge and a 33 connecting rod.

Detailed Description

In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the embodiments of the present invention are combined with the following description to clearly and completely describe the technical solution in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

The utility model provides a novel bellows life-test platform, as shown in fig. 2-4, including the operation panel (not shown in the figure), arrange bellows subassembly 1 on the operation panel in, test component 2, bellows subassembly 1 comprises the bellows 11 of two one side port intercommunications, two 11 ends in opposite directions of bellows link firmly through coupling assembling 3, test component 2 is including locating seal chamber 21 and two flexible actuating mechanism 22 on the operation panel, bellows subassembly 1 runs through seal chamber 21 and sets up and both ends and atmosphere intercommunication, two flexible actuating mechanism 22 are located seal chamber 21 both sides respectively, and flexible actuating mechanism 22 output shaft extends to in the bellows 11 and links to each other with coupling assembling 3.

The connecting assembly 3 includes a connecting ring 31, an inner ring edge 32, and a connecting rod 33, the inner ring edge 32 is fixedly disposed on the inner ring wall of the connecting ring 31, the connecting rod 33 is fixedly disposed between the inner ring edge 32 and the inner ring edge 32, and the connecting rod 33 passes through the center of the inner ring edge 32 and is a diameter rod, the output shafts of the two telescopic driving mechanisms 22 are respectively connected with the two side surfaces of the connecting rod 33, specifically, the connecting rod can be inserted into a slot or connected by installing other connecting pieces, or branch rods are disposed on the two sides of the connecting rod and run through the corrugated pipe, and then the two branch rods are connected with the output ends of the telescopic driving mechanisms outside the corrugated pipe assembly through the connecting pieces (compared with the case where.

Further, rubber gaskets are arranged on the inner wall of the connecting ring 31 and the outer wall of the annular edge 32, and the cross section of each rubber gasket is L-shaped; a sealing ring is arranged at the penetrating connection part of the corrugated pipe assembly 1 and the sealing chamber 21.

The utility model discloses compare in traditional single bellows detection, the bellows subassembly that the rational improvement was two combinations detects together, has not only improved detection efficiency, and flexible moreover examines time measuring, and seal chamber internal pressure is stable always on rated value, need not adorn energy storage ware and stabiliser, and is high-efficient practical, and the life-span number of times that the test was come out is more accurate.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. The utility model provides a novel bellows life test platform, includes the operation panel, arranges bellows subassembly, the test assembly on the operation panel in, its characterized in that: the bellows subassembly comprises the bellows of two one side port intercommunications, and two bellows are held in opposite directions and are linked firmly through coupling assembling, and the test assembly is including locating seal chamber and two flexible actuating mechanism on the operation panel, and the bellows subassembly runs through seal chamber and sets up and both ends and atmosphere intercommunication, and two flexible actuating mechanism are located seal chamber both sides respectively, and flexible actuating mechanism output shaft extends to in the bellows and links to each other with coupling assembling.

2. The new bellows life test stand of claim 1, wherein: the connecting assembly comprises a connecting ring, an inner ring edge and a connecting rod, the inner ring edge is fixedly arranged on the inner ring wall of the connecting ring, the connecting rod is fixedly arranged between the inner ring edge and the inner wall, and output shafts of the two telescopic driving mechanisms are respectively connected with two side faces of the connecting rod.

3. The new bellows life test stand of claim 2, wherein: the connecting rod is arranged along the circle center through the inner ring and is a diameter rod.

4. The new bellows life test stand of claim 2, wherein: rubber gaskets are arranged on the inner wall of the connecting ring and the outer wall of the annular edge, and the cross section of each rubber gasket is L-shaped.

5. The new bellows life test stand of claim 1, wherein: and a sealing ring is arranged at the penetrating connection part of the corrugated pipe assembly and the sealing cavity.