CN214622087U - External pressure testing device for corrugated pipe assembly for valve - Google Patents
External pressure testing device for corrugated pipe assembly for valve Download PDFInfo
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- CN214622087U CN214622087U CN202120232626.0U CN202120232626U CN214622087U CN 214622087 U CN214622087 U CN 214622087U CN 202120232626 U CN202120232626 U CN 202120232626U CN 214622087 U CN214622087 U CN 214622087U
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Abstract
A bellows assembly external pressure test device for valves, comprising: sealing the limiting device and pressing the cylinder body; the sealing and limiting device comprises an upper flange and a lower flange, a groove is arranged at the center of the inner side of the upper flange and the lower flange, a through hole is formed in the upper flange and the lower flange at the center of the groove, and a limiting bolt in the through hole is in threaded connection with sealing joints at two ends of the corrugated pipe assembly to be tested; a sealing groove is also arranged on the matching surface of the sealing joint and the corrugated pipe assembly to be tested, a built-in radial sealing ring is also arranged at the corresponding position of the sealing groove, and a limiting boss is also arranged on the side wall of the groove; the corresponding positions on the peripheries of the upper flange and the lower flange are also connected with double-end studs which are connected through nuts and washers; the pressurizing cylinder body comprises a cylinder body, a sealing flange and an axial sealing ring arranged at the joint between the cylinder body and the sealing flange, the axial sealing ring is connected with the sealing flange in a sealing manner through a fastening bolt and a fastening nut, and a pressurizing opening is formed in the sealing flange. The utility model discloses a bellows assembly to subassembly flange boltless hole receives external pressure intensity test.
Description
Technical Field
The utility model belongs to the technical field of bellows test device technique and specifically relates to a bellows subassembly external pressure verifying attachment for valve.
Background
As is known, a metal corrugated pipe has good sealing effect and displacement compensation capability, and valves in many important fields mostly adopt the metal corrugated pipe as a dynamic sealing part, so that the performance of the metal corrugated pipe directly affects the quality of the valve. For the corrugated pipe for the valve in the conventional field, a pressure-resistant form test is generally only carried out, but the corrugated pipe for the valve used in the fields of nuclear power, aerospace and the like, users have the requirement of carrying out strength factory test on the corrugated pipe or a corrugated pipe assembly.
The structure of the valve determines that the pressure bearing condition of the corrugated pipe assembly is the external pressure working condition, and therefore the same test condition is adopted for factory strength detection of the corrugated pipe assembly. Although many pressure test devices for the bellows or the bellows assembly are disclosed, most of the devices are designed under the condition that the bellows or the bellows assembly is subjected to internal pressure. And the individually disclosed corrugated pipe assembly external pressure test device also utilizes the bolt holes on the flange of the corrugated pipe assembly to carry out the corrugated pipe limiting design, for example, the patent numbers are as follows: 201821600999.3, the patent names: the testing device disclosed by the 'testing device for the corrugated pipe under external pressure' is characterized in that bolts penetrate through bolt holes in a flange plate of a corrugated pipe assembly to be connected with related parts, so that the corrugated pipe is prevented from generating axial movement during pressure testing. Some valve bellows assembly flanges do not have bolt holes, and in order to reduce the overall weight of the valve, the axial projection of the flange of a part of the bellows assembly is between the wave trough and the wave crest of the bellows. This has led to the failure to use the patent numbers: 201821600999.3, the patent names: the testing device disclosed by the 'testing device for the external pressure of the corrugated pipe' is used for testing the external pressure strength of the valve corrugated pipe assembly.
Based on above background, the utility model provides a bellows subassembly external pressure verifying attachment for valve, the key solution can't utilize bellows subassembly flange bolt hole to carry out the demand that spacing bellows subassembly for valve received the external pressure to detect.
SUMMERY OF THE UTILITY MODEL
The utility model provides a bellows subassembly that receives external pressure intensity test to the bellows subassembly of subassembly flange boltless hole is with bellows subassembly external pressure verifying attachment for valve.
The utility model discloses the purpose is realized through following technical scheme:
an external pressure testing device for a corrugated pipe assembly for a valve, which comprises: sealing of to-be-tested corrugated pipe assembly
The limiting device and the pressing cylinder body; the sealing limiting device comprises an upper flange and a lower flange, a groove is arranged at the center of the inner side of the upper flange and the center of the inner side of the lower flange, through holes are formed in the upper flange and the lower flange at the center of the groove, and limiting bolts in the through holes are in threaded connection with sealing joints at two ends of the corrugated pipe assembly to be tested; a sealing groove is also arranged on the matching surface of the sealing joint and the corrugated pipe assembly to be tested, a built-in radial sealing ring is also arranged at the corresponding position of the sealing groove, and a limiting boss is also arranged on the side wall of the groove; the corresponding positions of the peripheries of the upper flange and the lower flange are also connected with double-end studs which are fixedly connected through nuts and spring washers; the pressurizing cylinder body comprises a cylinder body and a sealing flange, wherein an axial sealing ring is arranged at the peripheral sealing connection position of the cylinder body and the sealing flange and is in sealing connection through a fastening bolt, a fastening gasket and a fastening nut, and a pressurizing opening is further formed in the sealing flange.
The upper flange or the lower flange is formed by butting two half flanges, and the butting part is fixedly connected with a screw.
The utility model discloses still include: and a pressure gauge is also arranged on the sealing flange of the pressurizing cylinder body.
The upper part of the center of the sealing joint is provided with a non-penetrating threaded hole, and the matching surface of the sealing joint and the corrugated pipe assembly is provided with a sealing groove. The sealing joint with the built-in radial sealing ring is matched with the inner diameter cylindrical surface of the flange of the corrugated pipe assembly to complete the sealing of the corrugated pipe. The limiting bolt penetrates through the two half flanges and the central holes of the half flanges to be in threaded connection with the central threaded hole of the sealing joint, and the limiting problem of the sealing joint is solved when the pressure resistance strength of the corrugated pipe assembly is tested. The two half flanges are integrally processed, and then are respectively processed after being cut into halves. The flange of the corrugated pipe assembly is axially compressed and limited by the arc-shaped bosses in the grooves of the two halving flanges. The two half flanges are mutually matched for use, and one half flange is taken as an example: the two ends of the connecting surface of the half flange are respectively provided with a positioning pin hole, one end of the connecting surface is provided with a threaded hole, and the other end of the connecting surface is provided with a through hole. The screw penetrates through the through hole of one half flange to be in threaded connection with the corresponding threaded hole of the other half flange, and the integral flatness of the end face of the half flange can be further guaranteed by arranging the positioning pin. The arrangement of the limiting pipe can ensure that the corrugated pipe is not over-compressed when the nut 2 locks the stud. The pressurizing cylinder body structure is used as a pressure cavity of the sealing limiting device, and the pressurizing test can be performed on valve corrugated pipe assemblies of similar specifications.
When the flanges at the two ends of the corrugated pipe assembly are of symmetrical structures, the parts such as the limiting bolt, the radial sealing ring, the sealing joint and the like are duplicated. When the flanges at the two ends of the corrugated pipe assembly are of asymmetric structures, the structures can be respectively designed with related parts to complete the design of the sealing and limiting device. For example: when the outer diameter of the flange at one end of the corrugated pipe assembly is larger than that at the other end, the inner diameters of the upper half flange groove and the lower half flange groove of the sealing limiting device can be respectively arranged.
The utility model discloses useful part lies in: compared with the prior art, the corrugated pipe assembly strength testing device can realize strength testing of the corrugated pipe assembly under the external pressure working condition. Meanwhile, the technical bottleneck that the valve corrugated pipe assembly without the bolt hole on the flange is subjected to external pressure intensity detection in the prior art can be solved. The whole axial of bellows subassembly is in the restraint state during external pressure testing, need not to carry out shaping work after the bellows subassembly is accomplished the experiment. When corrugated pipe assemblies with similar specifications are subjected to external pressure detection, the same type of pressing cylinder body can be adopted, and the test cost of the corrugated pipe assemblies with the similar specifications is indirectly reduced.
Drawings
FIG. 1 is a schematic diagram of the structure of the novel external pressure testing device;
fig. 2 is a schematic view of the sealing and limiting device in the direction A in fig. 1.
Description of the main components in the figures: 1 is a limit bolt; 2 is a flat washer; 3 is a nut; 4 is a spring washer; 5 is a double-end stud; 6 is a radial sealing ring; 7 is a sealing joint; 8 is a bellows component to be tested; 9 is a limit pipe; 10 is a screw; 11 is a halved flange I; 12 is a halved flange II; 13 is a positioning pin; 14 is a pressing port; 15 is a sealing flange; 16 is a pressure gauge; 17 is an axial sealing ring; 18 is a fastening bolt; 19 is a fastening washer; 20 is a fastening nut; 21 is a cylinder body; 22 is an arc-shaped limiting boss; 23 seal the groove.
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Detailed Description
As shown in fig. 1 and 2: do the utility model discloses the schematic structure diagram, it is including: bellows group to be tested
A sealing and limiting device and a pressing cylinder body of the piece 8; the sealing limiting device comprises an upper flange and a lower flange, the upper flange and the lower flange are formed by butting two half flanges I11 and two half flanges II 12, the half flanges are connected at the butting position by utilizing a positioning pin 13 and a screw 10, a groove is arranged at the center of the inner sides of the upper half flange and the lower half flange, through holes are formed in the upper half flange and the lower half flange at the center of the groove, and a limiting bolt 1 and a flat gasket 2 in each through hole are in threaded connection with sealing joints 7 at two ends of the corrugated pipe assembly to be tested; a sealing groove 23 is further arranged on the matching surface of the sealing joint 7 and the corrugated pipe component to be tested, a built-in radial sealing ring 6 is further arranged at the corresponding position of the sealing groove, and an arc-shaped limiting boss 22 is further arranged on the side wall of the groove; the corresponding positions of the peripheries of the upper half flange and the lower half flange are also connected with a double-end stud 5 which is fixedly connected through a nut 3 and a spring washer 4; the pressurizing cylinder body comprises a cylinder body 21 and a sealing flange 15, an axial sealing ring 17 is arranged at the peripheral sealing connection position of the cylinder body 21 and the sealing flange 15 and is in sealing connection through a fastening bolt 18, a fastening gasket 19 and a fastening nut 20, and a pressurizing opening 14 is further formed in the sealing flange 15.
In addition, a limit pipe 9 is sleeved on the stud 5 between the upper half flange and the lower half flange.
The first half flange 11 and the lower half flange 12 are integrally machined, and then the integral flange is machined after being cut. In order to ensure the surface quality of the corrugated pipe assembly, the surface finish Ra of the contact part of the inner groove of the halved flange and the corrugated pipe to be tested or the flange of the corrugated pipe assembly to be tested is less than or equal to 1.6 mu m. The length of the limiting pipe is designed according to the drawing requirements of the corrugated pipe assembly, and finally the effective length of the corrugated pipe meets the drawing requirements after the nut 3 and the stud 5 are locked. The surface finish Ra of the sealing joint groove is less than or equal to 1.6 mu m. The thickness of the part of the central threaded hole of the sealing joint, which is not drilled through, is reasonably designed according to test conditions.
The detection and operation method comprises the following steps: firstly, parts meeting the requirements are machined. And (3) putting the radial sealing ring 6 into a groove of a sealing joint 7, and completing the matching sealing of the sealing joint and the corrugated pipe assembly flange. After the first half flange 11 and the second half flange 12 are positioned with the flange of the corrugated pipe assembly 8 to be tested, the half flanges are connected by using the positioning pins 13 and the screws 10. The limiting bolt 1 penetrates through the center hole of the half flange and then is connected with the sealing joint 7. The stud 5 of the outer sleeve limiting pipe 9 is locked with the half flange through the nut 3, and the screwing length of the nut 3 can ensure that the end face of the half flange is contacted with the end face of the limiting pipe 9. After the sealing and limiting device is installed, the whole sealing and limiting device is placed into the pressurizing cylinder body, water is injected into the pressurizing cylinder body, and then the sealing flange 15 and the cylinder body 21 are locked through the fastening bolt 18 and the fastening nut 20. Carry out step-up, pressurize according to experimental requirement, until accomplishing experimental test, thereby realize the utility model discloses a purpose.
Claims (5)
1. An external pressure testing device for a corrugated pipe assembly for a valve, which comprises: the sealing and limiting device and the pressurizing cylinder body of the to-be-tested corrugated pipe assembly; the method is characterized in that: the sealing limiting device comprises an upper flange and a lower flange, a groove is arranged at the center of the inner side of the upper flange and the center of the inner side of the lower flange, through holes are formed in the upper flange and the lower flange at the center of the groove, and limiting bolts in the through holes are in threaded connection with sealing joints at two ends of the corrugated pipe assembly to be tested; a sealing groove is also arranged on the matching surface of the sealing joint and the corrugated pipe assembly to be tested, a built-in radial sealing ring is also arranged at the corresponding position of the sealing groove, and a limiting boss is also arranged on the side wall of the groove; the corresponding positions of the peripheries of the upper flange and the lower flange are also connected with double-end studs which are fixedly connected through nuts and spring washers; the pressurizing cylinder body comprises a cylinder body and a sealing flange, wherein an axial sealing ring is arranged at the peripheral sealing connection position of the cylinder body and the sealing flange and is in sealing connection through a fastening bolt, a fastening gasket and a fastening nut, and a pressurizing opening is further formed in the sealing flange.
2. The external pressure verification device for a bellows assembly for valves as claimed in claim 1, wherein: the flange is formed by butting two half flanges, and a screw is fixedly connected to the butting position.
3. The external pressure verification device for a bellows assembly for valves as claimed in claim 1, wherein: and a pressure gauge is also arranged on the sealing flange.
4. The external pressure verification device for a bellows assembly for valves as claimed in claim 1, wherein: the limiting boss is an arc-shaped limiting boss.
5. The external pressure verification device for a bellows assembly for valves as claimed in claim 1, wherein: a limit pipe is sleeved on the stud between the upper flange and the lower flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120232626.0U CN214622087U (en) | 2021-01-28 | 2021-01-28 | External pressure testing device for corrugated pipe assembly for valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120232626.0U CN214622087U (en) | 2021-01-28 | 2021-01-28 | External pressure testing device for corrugated pipe assembly for valve |
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| CN214622087U true CN214622087U (en) | 2021-11-05 |
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| CN202120232626.0U Active CN214622087U (en) | 2021-01-28 | 2021-01-28 | External pressure testing device for corrugated pipe assembly for valve |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113959858A (en) * | 2021-11-16 | 2022-01-21 | 沈阳仪表科学研究院有限公司 | Metal bellows stability test device |
-
2021
- 2021-01-28 CN CN202120232626.0U patent/CN214622087U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113959858A (en) * | 2021-11-16 | 2022-01-21 | 沈阳仪表科学研究院有限公司 | Metal bellows stability test device |
| CN113959858B (en) * | 2021-11-16 | 2024-03-15 | 沈阳仪表科学研究院有限公司 | Metal bellows stability test device |
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