CN212927835U - Multistage sealing pressure gauge - Google Patents
Multistage sealing pressure gauge Download PDFInfo
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- CN212927835U CN212927835U CN202021565605.2U CN202021565605U CN212927835U CN 212927835 U CN212927835 U CN 212927835U CN 202021565605 U CN202021565605 U CN 202021565605U CN 212927835 U CN212927835 U CN 212927835U
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- 238000007789 sealing Methods 0.000 title claims abstract description 222
- 210000004907 gland Anatomy 0.000 claims abstract description 52
- 239000011148 porous material Substances 0.000 claims abstract description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 abstract description 9
- 238000012360 testing method Methods 0.000 abstract description 9
- 239000003129 oil well Substances 0.000 abstract description 2
- 229910052594 sapphire Inorganic materials 0.000 description 5
- 239000010980 sapphire Substances 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model discloses a multistage sealing pressure gauge belongs to oil well testing auxiliary assembly field, including the mount pad, its characterized in that: be provided with gland, sensor and hollow ejector pin in the mount pad, it has first excircle seal groove to open on the mount pad, install first O shape sealing washer on the first excircle seal groove, it has second excircle seal groove and end face seal groove to open on the hollow ejector pin, install second O shape sealing washer on the second excircle seal groove, install third O shape sealing washer on the end face seal groove, it has third excircle seal groove and sealed recess to open on the sensor, install fourth O shape sealing washer on the third excircle seal groove, install the sealing washer on the sealed recess, it has fourth excircle seal groove and interior pore wall seal groove to open on the gland. The utility model discloses have good leakproofness, can prevent that the fluid in the pit from getting into the pressure gauge in, the protection pressure gauge does not receive the damage, the service reliability of guarantee pressure gauge, the life of extension pressure gauge.
Description
Technical Field
The utility model relates to oil well testing auxiliary assembly technical field especially relates to a multistage sealed pressure gauge.
Background
The field of oil and gas field exploration and development widely uses downhole electronic pressure gauges to obtain pressure and temperature values of oil, gas and water wells, and reservoir stratum data is obtained by analyzing and researching the pressure and the temperature, so that a theoretical basis is provided for further exploration and development of the oil and gas field. The pressure and temperature testing operation can not be separated from the electronic pressure gauge, and the pressure and temperature testing operation is mainly divided into a sapphire pressure gauge and a quartz crystal pressure gauge according to the difference of selected sensors. Compared with a quartz crystal pressure gauge, the sapphire pressure gauge has the characteristics of high shock resistance, short temperature sensing time and small volume, and is widely applied to measurement and recording of pressure and temperature in the stratum of an oil and gas field. The core component of the sapphire pressure gauge is the sensor. Because the underground working environment is severe and changeable, except that the manufacturing of the induction element needs to select special materials which are high temperature resistant and high pressure resistant and meet the requirements of underground operation, the operability of field personnel is also considered in the manufacturing process. Simple maintenance can improve the maintenance qualification rate, ensures the reliability of electron pressure gauge, prolongs its life.
The sealing structure of the sapphire pressure gauge sensor widely applied at present is that a plastic gasket is additionally arranged behind an O-shaped sealing ring of the sensor to prevent fluid or solid particles in a well from invading into the pressure gauge from the adjacent joint surface between the sensor and a pressure sensor mounting seat, and the structure is single.
The sealing ring and the gasket are only one respectively, once the sealing ring fails due to corrosion, fluid in the well enters the inner cavity of the pressure gauge, so that a sensor, a main board and a battery of the pressure gauge are damaged, the test fails, the pressure gauge must be returned to a factory for maintenance, and the cost is increased. Whether the sealing device of sapphire pressure gauge sensor can be fine protection pressure gauge makes its normal work directly decide the success or failure of construction operation. With the acceleration of the exploration and development speed of oil and gas fields and the continuous refinement of oil and gas exploration and oil and gas field work, the pressure test work is more and more frequent. The pressure testing process has higher requirements, and the normal operation of the construction test can be ensured only by reliably sealing the adjacent joint surfaces of the pressure gauge sensor and the pressure sensor mounting seat in the underground pressure testing construction operation.
Chinese patent document with publication number CN 206376860U, publication number 2017, 08.04.2017 discloses an underground electronic pressure gauge, which is characterized by comprising an upper joint, wherein two ends of the upper joint are respectively connected with a connector lug and an intermediate joint, a battery is arranged in the upper joint, the end part of the intermediate joint is connected with a lower joint, a sensor is arranged in the lower joint, a support is arranged in the intermediate joint, the support is detachably connected with the battery and the sensor respectively, and a circuit board is further arranged on the support. This patent document discloses a downhole electronic pressure gauge can dismantle continuously with battery and sensor respectively through with the support, installs the circuit board simultaneously on the support to avoid linking to each other circuit board and the direct welding of sensor, make electronic pressure gauge's maintenance more convenient, when electronic pressure gauge breaks down, can change circuit board or sensor alone, and need not carry out the overall change. However, the leakproofness is relatively poor, can not prevent effectively that the fluid in the pit from getting into the pressure gauge in, and the pressure gauge damages easily, influences the use reliability and the life of pressure gauge.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an overcome above-mentioned prior art's defect, provide a multistage sealed pressure gauge, the utility model discloses have good leakproofness, can prevent that fluid in the pit from getting into the pressure gauge in, protect the pressure gauge not receive the damage, ensure the service reliability of pressure gauge, prolong the life of pressure gauge.
The utility model discloses a following technical scheme realizes:
the utility model provides a multistage sealed pressure gauge, includes the mount pad, its characterized in that: the mounting seat is internally provided with a sealing gland, a sensor and a hollow ejector rod for pushing the sensor, one end of the sensor is contacted with the sealing gland, the other end of the sensor is contacted with the hollow ejector rod, the sealing gland is connected with the mounting seat through threads, a filtering steel sheet is connected in the sealing gland, the mounting seat is provided with a first excircle sealing groove, the first excircle sealing groove is provided with a first O-shaped sealing ring, the hollow ejector rod is provided with a second excircle sealing groove and an end face sealing groove, the second excircle sealing groove is provided with a second O-shaped sealing ring, the end face sealing groove is provided with a third O-shaped sealing ring, the sensor is provided with a third excircle sealing groove and a sealing groove, the third excircle sealing groove is provided with a fourth O-shaped sealing ring, the sealing groove is provided with a sealing ring gasket, and the sealing gland is provided with a fourth excircle sealing groove and an inner hole, and a fifth O-shaped sealing ring is arranged on the fourth excircle sealing groove, and a sixth O-shaped sealing ring is arranged on the inner hole wall sealing groove.
The mount pad includes first hollow section, second hollow section and third hollow section, and the internal diameter of first hollow section is greater than the second hollow section, and the internal diameter of second hollow section is greater than the third hollow section.
The hollow ejector rod penetrates through the third hollow section of the mounting seat, the hollow ejector rod is connected with the third hollow section in a sliding mode, one end of the hollow ejector rod extends into the second hollow section, and the other end of the hollow ejector rod extends out of the third hollow section.
The sealing gland is cylindrical and comprises a cylindrical section and an external thread section, and a linear groove is formed in the end face of the external thread section.
The hollow ejector rod is provided with a central wire hole.
The length of the first hollow section is smaller than that of the second hollow section, and the length of the second hollow section is smaller than that of the third hollow section.
The beneficial effects of the utility model are mainly expressed in the following aspect:
first, the utility model, a sealing gland, a sensor and a hollow mandril for pushing the sensor are arranged in a mounting seat, one end of the sensor is contacted with the sealing gland, the other end of the sensor is contacted with the hollow mandril, the sealing gland is connected with the mounting seat through screw thread, a filter steel sheet is connected in the sealing gland, a first excircle sealing groove is arranged on the mounting seat, a first O-shaped sealing ring is arranged on the first excircle sealing groove, a second excircle sealing groove and an end face sealing groove are arranged on the hollow mandril, a second O-shaped sealing ring is arranged on the second excircle sealing groove, a third O-shaped sealing ring is arranged on the end face sealing groove, a third excircle sealing groove and a sealing groove are arranged on the sensor, a fourth O-shaped sealing ring is arranged on the third excircle sealing groove, a sealing ring gasket is arranged on the sealing groove, a fourth excircle sealing groove and an, install fifth O shape sealing washer on the fourth excircle seal groove, install sixth O shape sealing washer on the interior pore wall seal groove, form tertiary seal structure, decomposed the vertical extrusion force that high-pressure fluid acted on between mount pad and the sensor in the single-stage seal well, reduced the sealed degree of difficulty, sealed effectual can prevent that fluid in the pit from getting into the pressure gauge in, the protection pressure gauge does not receive the damage, the service reliability of guarantee pressure gauge, the life of extension pressure gauge.
Two, the utility model discloses, the mount pad includes hollow section in first hollow section, the second and the hollow section in the third, and the internal diameter of hollow section in the first is greater than the hollow section in the second, and the internal diameter of hollow section in the second is greater than the hollow section in the third, is convenient for install gland, sensor and hollow ejector pin, and can make overall structure compact reasonable.
Third, the utility model discloses, hollow ejector pin runs through the third hollow section of mount pad, hollow ejector pin and third hollow section sliding connection, and in the hollow section was stretched into to the one end of hollow ejector pin in the second, the other end of hollow ejector pin stretched out the third hollow section, and the hollow ejector pin of being convenient for promotes the sensor, and the dismantlement of the follow-up sensor of being convenient for is changed.
Fourthly, the utility model discloses, gland is the cylinder form, including cylinder section and external screw thread section, be provided with "a" word recess on the terminal surface of external screw thread section, convenient to detach gland, it is more convenient to change.
Fifthly, the utility model discloses, it has central wire hole to open on the hollow ejector pin, is convenient for penetrate the wire, and the wire does not receive the damage when the sensor is changed in the protection dismantlement.
Sixth, the utility model discloses, the length of first cavity section is less than the cavity section in the second, and the length of cavity section in the second is less than the cavity section in the third, further makes whole pressure gauge structure compacter.
Drawings
The invention will be further described with reference to the accompanying drawings and specific embodiments, wherein:
fig. 1 is a schematic structural view of the present invention;
the labels in the figure are: 1. the device comprises a mounting seat, 2, a sealing gland, 3, a sensor, 4, a hollow ejector rod, 5, a filtering steel sheet, 6, a first O-shaped sealing ring, 7, a second O-shaped sealing ring, 8, a third O-shaped sealing ring, 9, a fourth O-shaped sealing ring, 10, a sealing ring gasket, 11, a fifth O-shaped sealing ring, 12, a sixth O-shaped sealing ring, 13, a first hollow section, 14, a second hollow section, 15, a third hollow section, 16, a column body section, 17, an external thread section, 18, a 'I' -shaped groove, 19 and a central wire guide hole.
Detailed Description
Example 1
Referring to fig. 1, a multistage sealing pressure gauge comprises a mounting base 1, a sealing gland 2, a sensor 3 and a hollow ejector rod 4 for pushing the sensor 3 are arranged in the mounting base 1, one end of the sensor 3 is contacted with the sealing gland 2, the other end of the sensor 3 is contacted with the hollow ejector rod 4, the sealing gland 2 is connected with the mounting base 1 through threads, a filter steel sheet 5 is connected in the sealing gland 2, a first excircle sealing groove is formed in the mounting base 1, a first O-shaped sealing ring 6 is arranged on the first excircle sealing groove, a second excircle sealing groove and an end face sealing groove are formed in the hollow ejector rod 4, a second O-shaped sealing ring 7 is arranged on the second excircle sealing groove, a third O-shaped sealing ring 8 is arranged on the end face sealing groove, a third excircle sealing groove and a sealing groove are formed in the sensor 3, and a fourth O-shaped sealing ring 9 is arranged on the third excircle sealing groove, and a sealing ring gasket 10 is arranged on the sealing groove, a fourth outer circle sealing groove and an inner hole wall sealing groove are formed in the sealing gland 2, a fifth O-shaped sealing ring 11 is arranged on the fourth outer circle sealing groove, and a sixth O-shaped sealing ring 12 is arranged on the inner hole wall sealing groove.
The embodiment is the most basic embodiment, a sealing gland 2, a sensor 3 and a hollow ejector rod 4 for pushing the sensor 3 are arranged in a mounting seat 1, one end of the sensor 3 is contacted with the sealing gland 2, the other end of the sensor 3 is contacted with the hollow ejector rod 4, the sealing gland 2 is in threaded connection with the mounting seat 1, a filter steel sheet 5 is connected in the sealing gland 2, a first excircle sealing groove is formed in the mounting seat 1, a first O-shaped sealing ring 6 is arranged on the first excircle sealing groove, a second excircle sealing groove and an end face sealing groove are formed in the hollow ejector rod 4, a second O-shaped sealing ring 7 is arranged on the second excircle sealing groove, a third O-shaped sealing ring 8 is arranged on the end face sealing groove, a third excircle sealing groove and a sealing groove are formed in the sensor 3, a fourth O-shaped sealing ring 9 is arranged on the third excircle sealing groove, and a sealing washer 10 is, it has fourth excircle seal groove and interior pore wall seal groove to open on gland 2, install fifth O shape sealing washer 11 on the fourth excircle seal groove, install sixth O shape sealing washer 12 on the interior pore wall seal groove, form tertiary seal structure, the vertical extrusion force that high-pressure fluid acted on between mount pad 1 and the sensor 3 in the single-stage seal well has been decomposed, the sealed degree of difficulty has been reduced, it is sealed effectual, can prevent in the fluid gets into the pressure gauge in the pit, protect the pressure gauge not damaged, guarantee the reliability in utilization of pressure gauge, the life of extension pressure gauge.
Example 2
Referring to fig. 1, a multistage sealing pressure gauge comprises a mounting base 1, a sealing gland 2, a sensor 3 and a hollow ejector rod 4 for pushing the sensor 3 are arranged in the mounting base 1, one end of the sensor 3 is contacted with the sealing gland 2, the other end of the sensor 3 is contacted with the hollow ejector rod 4, the sealing gland 2 is connected with the mounting base 1 through threads, a filter steel sheet 5 is connected in the sealing gland 2, a first excircle sealing groove is formed in the mounting base 1, a first O-shaped sealing ring 6 is arranged on the first excircle sealing groove, a second excircle sealing groove and an end face sealing groove are formed in the hollow ejector rod 4, a second O-shaped sealing ring 7 is arranged on the second excircle sealing groove, a third O-shaped sealing ring 8 is arranged on the end face sealing groove, a third excircle sealing groove and a sealing groove are formed in the sensor 3, and a fourth O-shaped sealing ring 9 is arranged on the third excircle sealing groove, and a sealing ring gasket 10 is arranged on the sealing groove, a fourth outer circle sealing groove and an inner hole wall sealing groove are formed in the sealing gland 2, a fifth O-shaped sealing ring 11 is arranged on the fourth outer circle sealing groove, and a sixth O-shaped sealing ring 12 is arranged on the inner hole wall sealing groove.
The mounting seat 1 comprises a first hollow section 13, a second hollow section 14 and a third hollow section 15, wherein the inner diameter of the first hollow section 13 is larger than that of the second hollow section 14, and the inner diameter of the second hollow section 14 is larger than that of the third hollow section 15.
In the embodiment, the mounting base 1 includes a first hollow section 13, a second hollow section 14 and a third hollow section 15, the inner diameter of the first hollow section 13 is greater than that of the second hollow section 14, and the inner diameter of the second hollow section 14 is greater than that of the third hollow section 15, so that the sealing gland 2, the sensor 3 and the hollow push rod 4 can be conveniently mounted, and the overall structure is compact and reasonable.
Example 3
Referring to fig. 1, a multistage sealing pressure gauge comprises a mounting base 1, a sealing gland 2, a sensor 3 and a hollow ejector rod 4 for pushing the sensor 3 are arranged in the mounting base 1, one end of the sensor 3 is contacted with the sealing gland 2, the other end of the sensor 3 is contacted with the hollow ejector rod 4, the sealing gland 2 is connected with the mounting base 1 through threads, a filter steel sheet 5 is connected in the sealing gland 2, a first excircle sealing groove is formed in the mounting base 1, a first O-shaped sealing ring 6 is arranged on the first excircle sealing groove, a second excircle sealing groove and an end face sealing groove are formed in the hollow ejector rod 4, a second O-shaped sealing ring 7 is arranged on the second excircle sealing groove, a third O-shaped sealing ring 8 is arranged on the end face sealing groove, a third excircle sealing groove and a sealing groove are formed in the sensor 3, and a fourth O-shaped sealing ring 9 is arranged on the third excircle sealing groove, and a sealing ring gasket 10 is arranged on the sealing groove, a fourth outer circle sealing groove and an inner hole wall sealing groove are formed in the sealing gland 2, a fifth O-shaped sealing ring 11 is arranged on the fourth outer circle sealing groove, and a sixth O-shaped sealing ring 12 is arranged on the inner hole wall sealing groove.
The mounting seat 1 comprises a first hollow section 13, a second hollow section 14 and a third hollow section 15, wherein the inner diameter of the first hollow section 13 is larger than that of the second hollow section 14, and the inner diameter of the second hollow section 14 is larger than that of the third hollow section 15.
Hollow ejector pin 4 runs through the third hollow section 15 of mount pad 1, hollow ejector pin 4 and the hollow section 15 sliding connection of third, and in the second hollow section 14 was stretched into to the one end of hollow ejector pin 4, the other end of hollow ejector pin 4 stretched out the hollow section 15 of third.
The sealing gland 2 is cylindrical and comprises a cylindrical section 16 and an external thread section 17, and a straight-line-shaped groove 18 is formed in the end face of the external thread section 17.
In this embodiment, the hollow top rod 4 penetrates through the third hollow section 15 of the mounting base 1, the hollow top rod 4 is slidably connected to the third hollow section 15, one end of the hollow top rod 4 extends into the second hollow section 14, and the other end of the hollow top rod 4 extends out of the third hollow section 15, so that the hollow top rod 4 can push the sensor 3, and the subsequent sensor 3 can be detached and replaced conveniently.
The gland 2 is cylindrical and comprises a cylindrical section 16 and an external thread section 17, wherein a straight groove 18 is formed in the end face of the external thread section 17, so that the gland 2 is convenient to disassemble and replace.
Example 4
Referring to fig. 1, a multistage sealing pressure gauge comprises a mounting base 1, a sealing gland 2, a sensor 3 and a hollow ejector rod 4 for pushing the sensor 3 are arranged in the mounting base 1, one end of the sensor 3 is contacted with the sealing gland 2, the other end of the sensor 3 is contacted with the hollow ejector rod 4, the sealing gland 2 is connected with the mounting base 1 through threads, a filter steel sheet 5 is connected in the sealing gland 2, a first excircle sealing groove is formed in the mounting base 1, a first O-shaped sealing ring 6 is arranged on the first excircle sealing groove, a second excircle sealing groove and an end face sealing groove are formed in the hollow ejector rod 4, a second O-shaped sealing ring 7 is arranged on the second excircle sealing groove, a third O-shaped sealing ring 8 is arranged on the end face sealing groove, a third excircle sealing groove and a sealing groove are formed in the sensor 3, and a fourth O-shaped sealing ring 9 is arranged on the third excircle sealing groove, and a sealing ring gasket 10 is arranged on the sealing groove, a fourth outer circle sealing groove and an inner hole wall sealing groove are formed in the sealing gland 2, a fifth O-shaped sealing ring 11 is arranged on the fourth outer circle sealing groove, and a sixth O-shaped sealing ring 12 is arranged on the inner hole wall sealing groove.
The mounting seat 1 comprises a first hollow section 13, a second hollow section 14 and a third hollow section 15, wherein the inner diameter of the first hollow section 13 is larger than that of the second hollow section 14, and the inner diameter of the second hollow section 14 is larger than that of the third hollow section 15.
Hollow ejector pin 4 runs through the third hollow section 15 of mount pad 1, hollow ejector pin 4 and the hollow section 15 sliding connection of third, and in the second hollow section 14 was stretched into to the one end of hollow ejector pin 4, the other end of hollow ejector pin 4 stretched out the hollow section 15 of third.
The sealing gland 2 is cylindrical and comprises a cylindrical section 16 and an external thread section 17, and a straight-line-shaped groove 18 is formed in the end face of the external thread section 17.
The hollow mandril 4 is provided with a central wire hole 19.
The length of the first hollow section 13 is smaller than that of the second hollow section 14, and the length of the second hollow section 14 is smaller than that of the third hollow section 15.
In the preferred embodiment, the hollow rod 4 is provided with a central wire hole 19 for allowing a wire to be easily inserted therein, thereby protecting the wire from damage when the sensor 3 is disassembled and replaced.
The length of the first hollow section 13 is smaller than that of the second hollow section 14, and the length of the second hollow section 14 is smaller than that of the third hollow section 15, so that the whole pressure gauge is more compact in structure.
Claims (6)
1. A multistage seal pressure gauge, includes mount pad (1), its characterized in that: the sensor is characterized in that a sealing gland (2), a sensor (3) and a hollow ejector rod (4) used for pushing the sensor (3) are arranged in the mounting seat (1), one end of the sensor (3) is in contact with the sealing gland (2), the other end of the sensor (3) is in contact with the hollow ejector rod (4), the sealing gland (2) is in threaded connection with the mounting seat (1), a filtering steel sheet (5) is connected in the sealing gland (2), a first excircle sealing groove is formed in the mounting seat (1), a first O-shaped sealing ring (6) is installed on the first excircle sealing groove, a second excircle sealing groove and an end face sealing groove are formed in the hollow ejector rod (4), a second O-shaped sealing ring (7) is installed on the second excircle sealing groove, a third O-shaped sealing ring (8) is installed on the end face sealing groove, a third excircle sealing groove and a sealing groove are formed in the sensor (3), install fourth O shape sealing washer (9) on the third excircle seal groove, install sealing washer (10) on the sealed recess, it has fourth excircle seal groove and interior pore wall seal groove to open on sealing gland (2), installs fifth O shape sealing washer (11) on the fourth excircle seal groove, installs sixth O shape sealing washer (12) on the interior pore wall seal groove.
2. A multistage manometer as claimed in claim 1, characterized in that: the mount pad (1) includes first hollow section (13), second hollow section (14) and third hollow section (15), and the internal diameter of first hollow section (13) is greater than second hollow section (14), and the internal diameter of second hollow section (14) is greater than third hollow section (15).
3. A multistage manometer as claimed in claim 2, characterized in that: hollow ejector pin (4) run through third cavity section (15) of mount pad (1), hollow ejector pin (4) and third cavity section (15) sliding connection, in the one end of hollow ejector pin (4) stretched into second cavity section (14), the other end of hollow ejector pin (4) stretched out third cavity section (15).
4. A multistage manometer as claimed in claim 1, characterized in that: the sealing gland (2) is cylindrical and comprises a cylinder section (16) and an external thread section (17), wherein a straight groove (18) is formed in the end face of the external thread section (17).
5. A multistage manometer as claimed in claim 1, characterized in that: the hollow ejector rod (4) is provided with a central wire hole (19).
6. A multistage manometer as claimed in claim 2, characterized in that: the length of the first hollow section (13) is smaller than that of the second hollow section (14), and the length of the second hollow section (14) is smaller than that of the third hollow section (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021565605.2U CN212927835U (en) | 2020-07-31 | 2020-07-31 | Multistage sealing pressure gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021565605.2U CN212927835U (en) | 2020-07-31 | 2020-07-31 | Multistage sealing pressure gauge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212927835U true CN212927835U (en) | 2021-04-09 |
Family
ID=75333959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021565605.2U Active CN212927835U (en) | 2020-07-31 | 2020-07-31 | Multistage sealing pressure gauge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212927835U (en) |
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2020
- 2020-07-31 CN CN202021565605.2U patent/CN212927835U/en active Active
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