CN219977708U - Pressure testing tool for ultralow-temperature large-caliber high-pressure valve - Google Patents
Pressure testing tool for ultralow-temperature large-caliber high-pressure valve Download PDFInfo
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- CN219977708U CN219977708U CN202321067513.5U CN202321067513U CN219977708U CN 219977708 U CN219977708 U CN 219977708U CN 202321067513 U CN202321067513 U CN 202321067513U CN 219977708 U CN219977708 U CN 219977708U
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- blind flange
- valve
- sleeve
- flange
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- 238000012360 testing method Methods 0.000 title claims abstract description 56
- 238000007789 sealing Methods 0.000 claims abstract description 18
- 230000007704 transition Effects 0.000 claims description 4
- 239000004429 Calibre Substances 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 8
- 230000000149 penetrating effect Effects 0.000 abstract description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000003949 liquefied natural gas Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 2
- 239000005977 Ethylene Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Examining Or Testing Airtightness (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The utility model provides a pressure test tool for an ultralow temperature large-caliber high-pressure valve, which belongs to the technical field of pressure test tools, wherein the valve comprises a valve body, end flanges are arranged on two sides of the valve body, sleeve pipes are welded at the end flanges, the pressure test tool comprises a blind flange, the blind flange comprises an avoidance part for the sleeve pipes to extend in and a connecting part positioned at the periphery of the avoidance part, the connecting part is abutted to the end flange, at least one sealing groove is arranged on the abutting end surface, a sealing gasket is arranged in the sealing groove, a plurality of through holes penetrating through the connecting part are formed in the periphery of the outer side of the sealing groove, the connecting part is connected with the end flange through studs and nuts, and a pressure test interface communicated with the avoidance part is arranged on the blind flange; according to the utility model, the sleeve is connected with the valve through the connecting part, and is connected with the nut through the stud, so that the sleeve is convenient to assemble and disassemble, and meanwhile, the sleeve is avoided from being deformed and damaged due to stress of the sleeve through the avoiding part, and the detection cost is reduced.
Description
Technical Field
The utility model relates to the technical field of pressure testing tools, in particular to a pressure testing tool for an ultralow-temperature large-caliber high-pressure valve.
Background
The valve is a control component in the fluid conveying system and has the functions of stopping, adjusting, guiding, preventing backflow, stabilizing pressure, diverting or overflow pressure relief and the like. The valve can be used for controlling the flow of various types of fluids such as air, water, steam, various corrosive media, slurry, oil products, liquid metal, radioactive media and the like. Wherein, the valve suitable for medium temperature below-150 ℃ is called as ultra-low temperature valve. The ultra-low temperature valve comprises a low temperature ball valve, a low temperature gate valve, a low temperature stop valve, a low temperature safety valve, a low temperature check valve and the like, and is mainly used for chemical devices such as thirty thousand tons of ethylene, liquefied natural gas and the like. The output liquid low-temperature medium such as ethylene, liquid oxygen, liquid hydrogen, liquefied natural gas, liquefied petroleum products and the like is inflammable and explosive, and is gasified when the temperature is raised, and the volume is expanded by hundreds of times when the temperature is raised. The material of the ultralow temperature valve is very important, and the material is unqualified, so that the shell and the sealing surface can leak outwards or inwards; the comprehensive mechanical properties, strength and rigidity of the parts can not meet the use requirements and even break. Causing leakage of lng medium to cause an explosion. Therefore, after the ultra-low temperature valve is manufactured, pressure test is needed to detect the strength performance and the sealing performance of the valve, some manufacturers use special pressure testing machines to carry out test and inspection, the manufacturing cost is increased, and some manufacturers select to manufacture special pressure test tools for detection.
The ultralow temperature valve generally comprises a valve body, end flanges are arranged on two sides of the valve body, sleeve pipes are welded at the end flanges, and the current pressure test fixture is connected with the sleeve pipes to form sealing fit when being assembled with the valve, so that acting force is concentrated on the sleeve pipes, but the sleeve pipes are generally thinner than the valve body in wall thickness and are easy to damage if being stressed too much.
Disclosure of Invention
The utility model aims to overcome the defects and the shortcomings of the prior art and provides a pressure test tool for an ultralow-temperature large-caliber high-pressure valve.
The technical scheme adopted by the utility model is as follows: a pressure testing frock for ultra-low temperature heavy-calibre high pressure valve, the valve is including the valve body, the valve body both sides all are provided with the tip flange, tip flange department welding has the sleeve, pressure testing frock is including the blind flange, the blind flange is including the portion of dodging that supplies the sleeve to stretch into and the connecting portion that is located dodging a periphery, connecting portion and tip flange looks butt and be provided with at least one seal groove at the butt terminal surface, be provided with sealing gasket in the seal groove, seal groove outside periphery is provided with the through-hole of a plurality of through-connection portions, connecting portion and tip flange pass through the double-screw bolt and are connected with the nut, be provided with the pressure testing interface that is linked together with dodging the portion on the blind flange.
The pressure test interface is arranged along the radial direction of the blind flange.
The avoidance part is a circular groove, the inner diameter of the circular groove is larger than the outer diameter of the sleeve, and a gap is reserved between the tail end of the sleeve and the bottom wall of the circular groove.
And the bottom of the circular groove is in smooth transition with the side wall.
And a plurality of lifting lugs are arranged on the blind flange.
The minimum wall thickness of the blind flange is not smaller than the average wall thickness of the valve body.
The pressure testing device comprises a pressure testing device, a pressure boosting device, a pressure detecting instrument and a pressure boosting device, wherein the pressure testing device is characterized in that two blind flange are respectively assembled on a medium inlet and a medium outlet of a valve, the pressure testing device is connected with the pressure testing interface on the blind flange assembled on the medium inlet, and the pressure testing instrument is connected with the pressure testing interface on the blind flange assembled on the medium outlet.
The beneficial effects of the utility model are as follows: according to the utility model, the sleeve is connected with the valve through the connecting part, and is connected with the nut through the stud, so that the sleeve is convenient to assemble and disassemble, and meanwhile, the sleeve is avoided from being deformed and damaged due to stress of the sleeve through the avoiding part, and the detection cost is reduced.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are required in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that it is within the scope of the utility model to one skilled in the art to obtain other drawings from these drawings without inventive faculty.
FIG. 1 is an exploded view of a blind flange and a valve body in accordance with a first embodiment;
FIG. 2 is a schematic view of a blind flange according to a first embodiment;
FIG. 3 is a schematic view of a blind flange and a valve body according to a first embodiment;
FIG. 4 is a cross-sectional view of the blind flange and valve body assembly of the first embodiment;
FIG. 5 is a cross-sectional view of the blind flange of the first embodiment shown separated from the valve body;
FIG. 6 is a cross-sectional view of a blind flange assembly with a valve body according to a second embodiment;
in the figure, a 1-end flange, a 2-sleeve, a 3-blind flange, a 31-avoiding part, a 32-connecting part, a 33-smooth transition, a 4-sealing groove, a 5-through hole, a 6-pressure test interface and a 7-lifting lug are arranged.
Detailed Description
The present utility model will be described in further detail with reference to the accompanying drawings, for the purpose of making the objects, technical solutions and advantages of the present utility model more apparent.
It should be noted that, in the embodiments of the present utility model, all the expressions "first" and "second" are used to distinguish two entities with the same name but different entities or different parameters, and it is noted that the "first" and "second" are only used for convenience of expression, and should not be construed as limiting the embodiments of the present utility model, and the following embodiments are not described one by one.
The terms of direction and position in the present utility model, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., refer only to the direction or position of the drawing. Accordingly, directional and positional terms are used to illustrate and understand the utility model and are not intended to limit the scope of the utility model.
Embodiment one:
as shown in fig. 1 to 5, a pressure testing tool for an ultralow temperature large-caliber high-pressure valve, the valve comprises a valve body, end flanges 1 are arranged on two sides of the valve body, a medium channel is arranged in the valve body, the medium channel comprises a medium outlet and a medium inlet, the end flanges 1 are respectively arranged at the medium outlet and the medium inlet, sleeve pipes 2 are welded at the end flanges 1, the pressure testing tool comprises a blind flange 3, the blind flange 3 is made of austenitic metal suitable for low temperature and is subjected to low temperature treatment, the blind flange 3 comprises an avoidance part 31 for the sleeve pipes 2 to extend in and a connecting part 32 positioned at the periphery of the avoidance part 31, the connecting part 32 is abutted to the end flanges 1 and is provided with at least one sealing groove 4 at the abutting end face, and sealing gaskets are arranged in the sealing grooves 4.
The circumference is provided with a plurality of through holes 5 penetrating through the connecting portion outside the sealing groove 4, the connecting portion 32 is connected with the end flange 1 through the stud 51 and the nut 52, wherein the stud 51 and the nut 52 also adopt the stud and the nut suitable for the high-pressure working condition, the structure is simple, and the disassembly and the assembly are convenient.
Be provided with on the blind flange 3 with dodge the pressure testing interface 6 that portion 31 is linked together, can external pressure testing instrument detector, this frock security performance is good, easy dismounting, pressure testing efficient and compact structure bring practice thrift the production energy consumption to can multiple times, long-time use, long service life.
Further, the pressure test interface 6 is radially arranged along the blind flange 3, so that the external pressure test instrument detector can be conveniently connected, and data can be quickly read in the test process.
The avoiding portion 31 is a circular groove, the inner diameter of the circular groove is larger than the outer diameter of the sleeve 2, a gap is reserved between the tail end of the sleeve 2 and the bottom wall of the circular groove, the avoiding portion 31 is not in contact with the sleeve 2, deformation and damage caused by stress of the sleeve 2 are avoided, and detection cost is reduced.
Smooth transition is formed between the bottom and the side wall of the circular groove, so that the overall strength is improved, the turbulent flow state of a gas medium is lightened, and the use safety is improved.
Be provided with a plurality of lugs 7 on the blind flange 3, convenient hoist and mount and removal to promote detection efficiency.
The minimum wall thickness of the blind flange 3 is not smaller than the average wall thickness of the valve body, so that the tool is ensured to have extremely excellent high-performance sealing and high bearing strength, and the blind flange is suitable for ultralow-temperature working conditions and improves safety.
The two blind flange 3 are respectively assembled at a medium inlet and a medium outlet of the valve, wherein a pressure testing interface 6 assembled on the blind flange 3 at the medium inlet is connected with an inflation boosting device, and a pressure testing instrument is connected with the pressure testing interface 6 assembled on the blind flange 3 at the medium outlet.
The specific detection process comprises the following steps: the pressure test fixture is required to be integrally soaked in a low-temperature tank, a cooling medium is liquid nitrogen, and the liquid nitrogen level is required to cover the upper end of the connecting part of the valve body and the valve cover of the test valve, so that the valve reaches the corresponding low-temperature test temperature; the inlet end tool, namely the blind flange, is externally connected with a test gas medium helium boost, and the outlet end tool, namely the blind flange, is connected with a pressure detection instrument to detect the leakage quantity of the valve.
Embodiment two:
in this embodiment, as shown in fig. 6, the bottom wall of the circular groove is provided with an installation groove 8, a sealing ring 9 adapted to the end of the sleeve 2 is disposed in the installation groove 8, the sealing ring 9 forms a seal with the sleeve 2 and the blind flange 3, a closed chamber 10 is formed among the sleeve 2, the sealing ring 9, the end flange 1 and the blind flange 3, and the pressure test interface 6 is communicated with the closed chamber 10.
In summary, by combining the pressure test tool of the first embodiment and the second embodiment, the tightness detection of the sleeve 2 and the tightness detection of the valve except the sleeve 2 can be realized.
The foregoing disclosure is illustrative of the present utility model and is not to be construed as limiting the scope of the utility model, which is defined by the appended claims.
Claims (7)
1. A pressure testing frock for ultra-low temperature heavy-calibre high pressure valve, the valve is including the valve body, the valve body both sides all are provided with tip flange (1), tip flange (1) department welding has sleeve (2), its characterized in that, pressure testing frock is including blind flange (3), blind flange (3) are including dodging portion (31) and connecting portion (32) that are located dodging portion (31) periphery that supply sleeve (2) to stretch into, connecting portion (32) and tip flange (1) looks butt and be provided with at least one seal groove (4) at the butt terminal surface, be provided with sealing gasket in seal groove (4), seal groove (4) outside periphery is provided with through-hole (5) of a plurality of through-connection portions, connecting portion (32) are connected with nut (52) through double-screw bolt (51) with tip flange (1), be provided with on blind flange (3) and dodge portion (31) pressure testing interface (6).
2. The pressure test fixture for the ultralow-temperature large-caliber high-pressure valve according to claim 1, wherein the pressure test interface (6) is arranged along the radial direction of the blind flange (3).
3. The pressure testing tool for the ultralow-temperature large-caliber high-pressure valve according to claim 1, wherein the avoiding portion (31) is a circular groove, the inner diameter of the circular groove is larger than the outer diameter of the sleeve tube (2), and a gap is formed between the tail end of the sleeve tube (2) and the bottom wall of the circular groove.
4. A pressure test fixture for ultra-low temperature large-caliber high-pressure valves according to claim 3, wherein the round groove has a smooth transition (33) between the groove bottom and the side wall.
5. The pressure testing tool for the ultralow-temperature large-caliber high-pressure valve according to claim 1, wherein the blind flange (3) is provided with a plurality of lifting lugs (7).
6. The pressure test fixture for the ultra-low temperature large-caliber high-pressure valve according to claim 1, wherein the minimum wall thickness of the blind flange (3) is not smaller than the average wall thickness of the valve body.
7. The pressure testing fixture for the ultra-low temperature large-caliber high-pressure valve according to any one of claims 1 to 6, wherein the number of the blind flange (3) is two, and the blind flange (3) is respectively assembled on a medium inlet and a medium outlet of the valve, wherein a pressure testing interface (6) assembled on the blind flange (3) of the medium inlet is connected with an inflation pressure boosting device, and a pressure testing instrument is connected with the pressure testing interface (6) assembled on the blind flange (3) of the medium outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321067513.5U CN219977708U (en) | 2023-05-04 | 2023-05-04 | Pressure testing tool for ultralow-temperature large-caliber high-pressure valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321067513.5U CN219977708U (en) | 2023-05-04 | 2023-05-04 | Pressure testing tool for ultralow-temperature large-caliber high-pressure valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219977708U true CN219977708U (en) | 2023-11-07 |
Family
ID=88596429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321067513.5U Active CN219977708U (en) | 2023-05-04 | 2023-05-04 | Pressure testing tool for ultralow-temperature large-caliber high-pressure valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219977708U (en) |
-
2023
- 2023-05-04 CN CN202321067513.5U patent/CN219977708U/en active Active
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