CN108871960B - Flange type pressure testing machine for pressure gauge - Google Patents
Flange type pressure testing machine for pressure gauge Download PDFInfo
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- CN108871960B CN108871960B CN201810619812.2A CN201810619812A CN108871960B CN 108871960 B CN108871960 B CN 108871960B CN 201810619812 A CN201810619812 A CN 201810619812A CN 108871960 B CN108871960 B CN 108871960B
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- 238000012360 testing method Methods 0.000 title claims abstract description 191
- 238000006243 chemical reaction Methods 0.000 abstract description 6
- 239000007788 liquid Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 210000000078 claw Anatomy 0.000 description 2
- 230000000994 depressogenic effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention belongs to the technical field of auxiliary pressure test facilities of a flange type pressure gauge, and particularly relates to a pressure test machine of the flange type pressure gauge, which comprises a hydraulic unit, a control unit, a pressure test medium input control unit and a machine base, wherein the hydraulic unit is respectively connected with the control unit and the pressure test medium input control unit, the control unit is connected with the pressure test medium input control unit, and the hydraulic unit, the control unit and the pressure test medium input control unit are all connected on the machine base, so that the problems that a special pressure test hydraulic clamping device is not needed in the pressure test of the flange type pressure gauge in the prior art, an external conversion device is used in the pressure test work, the pressure test efficiency is low, and the operation risk is large are solved, the operation risk is small.
Description
Technical Field
The invention belongs to the technical field of auxiliary pressure test facilities of flange type pressure gauges, and particularly relates to a pressure test machine of a flange type pressure gauge.
Background
The pressure gauge of the pressure testing machine in the prior art is directly installed on the pressure testing machine through the connecting flange, and the pressure testing machine is often required to be used under different working conditions, and the connecting flange of the pressure gauge is installed in a suspension mode, so that the pressure gauge is damaged due to the fact that the pressure gauge is easily collided, extruded and the like, and the service life of the pressure testing machine is influenced.
At present, a flange type pressure gauge does not have a special pressure testing hydraulic clamping device for pressure testing, an external conversion device is used for pressure testing, the pressure testing efficiency is low, and the operation risk is large; meanwhile, the pressure testing device at home and abroad on the market is very huge, complex to install and disassemble, inconvenient to overhaul and maintain and capable of increasing the production cost and the maintenance cost.
Disclosure of Invention
The pressure test machine of the flange type pressure gauge provided by the invention aims to solve the problems that the pressure test of the flange type pressure gauge in the prior art does not have a special pressure test hydraulic clamping device, an external conversion device is used for pressure test, the pressure test efficiency is low, and the operation risk is large; the pressure gauge or the pressure testing machine is damaged easily due to the suspended structure of the pressure gauge and the connecting flange, and the service life of the pressure testing machine is influenced; the third purpose is to overcome the current pressure testing machine bulky, the installation, dismantle and overhaul all inconvenient problem.
Therefore, the invention provides a pressure testing machine of a flange type pressure gauge, which comprises a hydraulic unit, a control unit, a pressure testing medium input control unit and a machine base, wherein the hydraulic unit is respectively connected with the control unit and the pressure testing medium input control unit, the control unit is connected with the pressure testing medium input control unit, and the hydraulic unit, the control unit and the pressure testing medium input control unit are all connected on the machine base.
The hydraulic unit includes left jack catch, right jack catch, left lateral shifting hydro-cylinder assembly, right lateral shifting hydro-cylinder assembly, left jacking hydro-cylinder assembly, right jacking hydro-cylinder assembly, left pressure testing flange, right pressure testing flange, left side jack catch passes through left lateral shifting hydro-cylinder assembly and connects on the left part top of frame, right jack catch passes through right lateral shifting hydro-cylinder assembly and connects on the right part top of frame, left pressure testing flange and left jacking hydro-cylinder assembly are connected gradually from the top down to the inside left side jack catch, right pressure testing flange and right jacking hydro-cylinder assembly are connected gradually from the top down to the inside right side jack catch.
The control unit comprises a hydraulic station and a control panel assembly, the hydraulic station is connected in the base, the control panel assembly is connected to the top end of the base, and the control panel assembly is connected with a left transverse moving oil cylinder assembly, a right transverse moving oil cylinder assembly, a left jacking oil cylinder assembly and a right jacking oil cylinder assembly.
Pressure testing medium input control unit includes entry tee bend and pressure testing pipeline, and the entry tee bend includes left opening, right opening and medium opening, and left opening passes through pressure testing pipeline intercommunication left pressure testing flange, and right opening passes through pressure testing pipeline intercommunication right pressure testing flange, and the medium opening communicates hydraulic pressure station.
The pressure testing medium input control unit further comprises a left cock and a right cock, the left cock is connected to a pressure testing pipeline between the left opening and the left pressure testing flange, the right cock is connected to a pressure testing pipeline between the right opening and the right pressure testing flange, and the left cock and the right cock are respectively connected with the control unit.
The hydraulic unit further comprises a left flange type pressure gauge and a right flange type pressure gauge, the left flange type pressure gauge is connected to the left pressure testing flange, and the right flange type pressure gauge is connected to the right pressure testing flange.
The left jack catch includes first left petal body and first right petal body, and the right jack catch includes second left petal body and second right petal body, and first left petal body, first right petal body, second left petal body and second right petal body are half-cylinder, and the axle center department of first left petal body and second left petal body is sunken left, and the axle center department of first right petal body and second right petal body is sunken right, and left pressure testing flange and left jacking cylinder assembly are located the depressed part between first left petal body and the first right petal body, and right pressure testing flange and right jacking cylinder assembly are located the depressed part between second left petal body and the second right petal body.
The left transverse moving oil cylinder assembly comprises a first left piston rod and a first right piston rod, the left end of the first left piston rod and the right end of the first right piston rod are both connected with the base, the right end of the first left piston rod is connected with the left side of the first left petal body, and the left end of the first right piston rod is connected with the right side of the first right petal body; the right transverse moving oil cylinder assembly comprises a second left piston rod and a second right piston rod, the left end of the second left piston rod and the right end of the second right piston rod are both connected with the base, the right end of the second left piston rod is connected with the left side of the second left petal body, and the left end of the second right piston rod is connected with the right side of the second right petal body.
The invention has the beneficial effects that:
1. the flange type pressure gauge pressure testing machine provided by the invention selects the left pressure testing flange and the right pressure testing flange according to the specification of a pressure testing workpiece (the flange type pressure gauge), controls the hydraulic unit on the control panel assembly to install the flange type pressure gauge on the pressure testing flange, and enables a pressure testing medium to enter the flange type pressure gauge through the control panel assembly, so that the pressure testing machine can carry out pressure testing work; the left pressure test flange and the right pressure test flange can be replaced, so that different pressure test workpieces (flange type pressure gauges) are installed; the left cock and the right cock can control the cut-off and the smoothness of the left test pipeline and the right test pipeline, so that whether the left flange type pressure gauge and the right flange type pressure gauge work simultaneously or not is controlled; the pressure testing work of the pressure testing machine of the flange type pressure gauge does not need to use an external conversion device, the flange type pressure gauge can be tightly installed by hydraulic drive, the operation is convenient and rapid, the pressure testing efficiency is high, and the operation risk is small;
2. the left pressure test flange and the left flange type pressure gauge are both positioned in the left clamping jaw, and the right pressure test flange and the right flange type pressure gauge are both positioned in the right clamping jaw, so that the damage of the left pressure test flange, the left flange type pressure gauge, the right pressure test flange and the right flange type pressure gauge in the use process is avoided, and the service life of the pressure test machine is prolonged;
3. the invention has small volume, convenient installation, disassembly and maintenance and simple operation.
Drawings
The present invention will be described in further detail below with reference to the accompanying drawings.
FIG. 1 is a schematic view of a pressure testing machine of a flange type pressure gauge.
Description of reference numerals: 1. a left jaw; 2. a right jaw; 3. a left lateral shifting cylinder assembly; 4. a right transverse moving oil cylinder assembly; 5. a left jacking cylinder assembly; 6. a right jacking cylinder assembly; 7. a left pressure test flange; 8. a right pressure test flange; 9. an inlet tee joint; 10. a pressure test pipeline; 11. levocock; 12. right cock; 13. a machine base; 14. a hydraulic station; 15. a control panel assembly; 1-1, a first left valve body; 1-2, a first right flap body; 2-1, a second left valve body; 2-2, a second right flap body; 3-1, a first left piston rod; 3-2, a first right piston rod; 4-1, a second left piston rod; 4-2, a second right piston rod; 9-1, a left through opening; 9-2, a right through opening; 9-3 and a medium port.
Detailed Description
Example 1:
a pressure testing machine of a flange type pressure gauge comprises a hydraulic unit, a control unit, a pressure testing medium input control unit and a base 13, wherein the hydraulic unit is respectively connected with the control unit and the pressure testing medium input control unit, the control unit is connected with the pressure testing medium input control unit, and the hydraulic unit, the control unit and the pressure testing medium input control unit are all connected to the base 13.
Example 2:
as shown in fig. 1, a pressure testing machine of a flange type pressure gauge comprises a hydraulic unit, a control unit, a pressure testing medium input control unit and a base 13, wherein the hydraulic unit is respectively connected with the control unit and the pressure testing medium input control unit, the control unit is connected with the pressure testing medium input control unit, and the hydraulic unit, the control unit and the pressure testing medium input control unit are all connected on the base 13.
The flange type pressure testing machine for the pressure gauge does not need an external conversion device during pressure testing, can be driven by hydraulic pressure to tightly mount the pressure gauge, is convenient and quick to operate, high in pressure testing efficiency and small in operation risk, and is small in size, convenient to mount, dismount and maintain and simple to operate.
Example 3
4. On the basis of embodiment 1, the hydraulic unit includes left jack catch 1, right jack catch 2, left lateral shifting hydro-cylinder assembly 3, right lateral shifting hydro-cylinder assembly 4, left jacking hydro-cylinder assembly 5, right jacking hydro-cylinder assembly 6, left pressure testing flange 7, right pressure testing flange 8, left jack catch 1 is connected on the left top of frame 13 through left lateral shifting hydro-cylinder assembly 3, right jack catch 2 is connected on the right top of frame 13 through right lateral shifting hydro-cylinder assembly 4, left pressure testing flange 7 and left jacking hydro-cylinder assembly 5 are connected gradually from the top down to the inside left jack catch 1, right pressure testing flange 8 and right jacking hydro-cylinder assembly 6 are connected gradually from the top down to the inside right jack catch 2. The control unit controls the left transverse moving oil cylinder assembly 3 to control the opening and closing of the left clamping jaw 1 so as to control the horizontal movement of the left pressure test flange 7, and the control unit controls the left jacking oil cylinder assembly 5 to lift so as to control the up-and-down movement of the left pressure test flange 7; the control unit controls the right transverse moving oil cylinder assembly 4 to control the opening and closing of the right clamping jaw 2, so that the right pressure test flange 8 is controlled to move horizontally, the control unit controls the right jacking oil cylinder assembly 6 to lift so as to control the right pressure test flange 8 to move up and down, the automation degree is high, the structure is simple, and the operability is strong. Left pressure testing flange 7 and left flange formula manometer all are located left jack catch 1, and right pressure testing flange 7 and right flange formula manometer all are located right jack catch 2, have avoided the damage of left pressure testing flange 7, left flange formula manometer, right pressure testing flange 7 and right flange formula manometer in the use, prolong the life of pressure testing machine.
The control unit comprises a hydraulic station 14 and a control panel assembly 15, wherein the hydraulic station 14 is connected inside the base 13, the control panel assembly 15 is connected at the top end of the base 13, and the control panel assembly 15 is connected with the left transverse moving oil cylinder assembly 3, the right transverse moving oil cylinder assembly 4, the left jacking oil cylinder assembly 5 and the right jacking oil cylinder assembly 6. The hydraulic station 14 provides pressure fluid and hydraulic energy for a pressure testing machine of a flange type pressure gauge, and the control panel assembly 15 controls the operation by using an electric element in the prior art, which is not described in detail herein.
The pressure test medium input control unit comprises an inlet tee joint 9 and a pressure test pipeline 10, the inlet tee joint 9 comprises a left port 9-1, a right port 9-2 and a medium port 9-3, the left port 9-1 is communicated with a left pressure test flange 7 through the pressure test pipeline 10, the right port 9-2 is communicated with a right pressure test flange 8 through the pressure test pipeline 10, and the medium port 9-3 is communicated with a hydraulic station 14. The pressure liquid of the hydraulic station 14 enters the left pressure test flange 7 through the left port 9-1, the pressure liquid of the hydraulic station 14 enters the right pressure test flange 8 through the right port 9-2, and the hydraulic pressure testing device is convenient and rapid to operate and high in pressure testing efficiency.
The pressure test medium input control unit further comprises a left cock 11 and a right cock 12, the left cock 11 is connected to a pressure test pipeline 10 between the left opening 9-1 and the left pressure test flange 7, the right cock 12 is connected to a pressure test pipeline 10 between the right opening 9-2 and the right pressure test flange 8, and the left cock 11 and the right cock 12 are respectively connected with the control unit. The left cock 11 and the right cock 12 can control the cut-off and the smoothness of the test pipeline 10, have strong controllability, are convenient for pressure test and maintenance, and improve the safety of pressure test work.
The hydraulic unit further comprises a left flange type pressure gauge and a right flange type pressure gauge, the left flange type pressure gauge is connected to the left pressure testing flange 7, and the right flange type pressure gauge is connected to the right pressure testing flange 8.
The left jaw 1 comprises a first left petal body 1-1 and a first right petal body 1-2, the right jaw 2 comprises a second left petal body 2-1 and a second right petal body 2-2, the first left petal body 1-1 and the first right petal body 1-2, the second left valve body 2-1 and the second right valve body 2-2 are both half cylinders, the axle centers of the first left valve body 1-1 and the second left valve body 2-1 are recessed leftwards, the axle centers of the first right valve body 1-2 and the second right valve body 2-2 are recessed rightwards, the left pressure test flange 7 and the left jacking cylinder assembly 5 are located at the recessed position between the first left valve body 1-1 and the first right valve body 1-2, and the right pressure test flange 8 and the right jacking cylinder assembly 6 are located at the recessed position between the second left valve body 2-1 and the second right valve body 2-2. The structure facilitates the opening and closing of the left clamping jaw 1 and the right clamping jaw 2, the structure is simple, the space utilization rate is improved, and the size of the pressure testing machine is reduced.
The left transverse moving oil cylinder assembly 3 comprises a first left piston rod 3-1 and a first right piston rod 3-2, the left end of the first left piston rod 3-1 and the right end of the first right piston rod 3-2 are both connected with a machine base 13, the right end of the first left piston rod 3-1 is connected with the left side of the first left valve body 1-1, and the left end of the first right piston rod 3-2 is connected with the right side of the first right valve body 1-2; the right transverse moving oil cylinder assembly 4 comprises a second left piston rod 4-1 and a second right piston rod 4-2, the left end of the second left piston rod 4-1 and the right end of the second right piston rod 4-2 are both connected with the machine base 13, the right end of the second left piston rod 4-1 is connected with the left side of the second left valve body 2-1, and the left end of the second right piston rod 4-2 is connected with the right side of the second right valve body 2-2. The piston rod is stretched out and drawn back conveniently and drives the left claw 1 and the right claw 2 to open and close.
The working principle of the invention is as follows:
a hydraulic unit is controlled on a control panel assembly 15, a left flange type pressure gauge is installed on a left pressure test flange 7, a right flange type pressure gauge is installed on a right pressure test flange 8, a pressure test medium of a hydraulic station 14 is controlled by the control panel assembly 15 to enter the left pressure test flange 7 through a left opening 9-1, pressure liquid of the hydraulic station 14 enters the right pressure test flange 8 through a right opening 9-2, and the pressure liquid can be subjected to pressure test work through entering a pressure test machine of the flange type pressure gauge; the control panel assembly 15 controls the left transverse moving oil cylinder assembly 3 to control the opening and closing of the left clamping jaw 1 so as to control the horizontal movement of the left pressure test flange 7, and the control panel assembly 15 controls the left jacking oil cylinder assembly 5 to lift so as to control the up-and-down movement of the left pressure test flange 7; the control panel assembly 15 controls the right transverse moving oil cylinder assembly 4 to control the opening and closing of the right clamping jaw 2, so that the horizontal movement of the right pressure test flange 8 is controlled, the control panel assembly 15 controls the right jacking oil cylinder assembly 6 to lift so as to control the up-down movement of the right pressure test flange 8, the movement of the left pressure test flange 7 drives the movement of the left flange type pressure gauge, and the movement of the right pressure test flange 8 drives the movement of the right flange type pressure gauge.
Example 3
A field installation scheme:
A220V power supply is connected on site, a left pressure test flange and a right pressure test flange are selected according to the specification of a pressure test workpiece (a flange type pressure gauge), a hydraulic unit is controlled on a control panel assembly to install the flange type pressure gauge on the pressure test flange, and a pressure test operation system controls a pressure test medium to enter the flange type pressure gauge pressure test machine to carry out pressure test operation. The left pressure test flange and the right pressure test flange can be replaced, so that different pressure test workpieces (flange type pressure gauges) are installed; the left cock and the right cock can control the cut-off and the smoothness of the left test pipeline and the right test pipeline, thereby controlling whether the left test pipeline and the right test pipeline work simultaneously.
The flange type pressure testing machine of the pressure gauge does not need to use an external conversion device during pressure testing, can be driven by hydraulic pressure to clamp the pressure gauge, and has the advantages of convenient and quick operation, high pressure testing efficiency and small operation risk.
In the description of the present invention, it is to be understood that the terms "left", "right", and the like, if any, indicate an orientation or positional relationship based on that shown in the drawings, and do not indicate or imply that the referred device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore, the terms describing a positional relationship in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.
The above examples are merely illustrative of the present invention and should not be construed as limiting the scope of the invention, which is intended to be covered by the claims and any design similar or equivalent to the scope of the invention.
Claims (7)
1. The utility model provides a flange formula manometer pressure testing machine which characterized in that: the device comprises a hydraulic unit, a control unit, a pressure test medium input control unit and a machine base (13), wherein the hydraulic unit is respectively connected with the control unit and the pressure test medium input control unit, the control unit is connected with the pressure test medium input control unit, and the hydraulic unit, the control unit and the pressure test medium input control unit are all connected to the machine base (13); the hydraulic unit comprises a left jaw (1), a right jaw (2), a left lateral shifting oil cylinder assembly (3), a right lateral shifting oil cylinder assembly (4), a left jacking oil cylinder assembly (5), a right jacking oil cylinder assembly (6), a left pressure test flange (7), a right pressure test flange (8), the left jaw (1) is connected to the left top end of a machine base (13) through the left lateral shifting oil cylinder assembly (3), the right jaw (2) is connected to the right top end of the machine base (13) through the right lateral shifting oil cylinder assembly (4), the left pressure test flange (7) and the left jacking oil cylinder assembly (5) are sequentially connected to the left jaw (1) from top to bottom, the right pressure test flange (8) and the right jacking oil cylinder assembly (6) are sequentially connected to the right jaw (2) from top to bottom.
2. The pressure testing machine of the flange type pressure gauge according to claim 1, characterized in that: the control unit comprises a hydraulic station (14) and a control panel assembly (15), the hydraulic station (14) is connected in the base (13), the control panel assembly (15) is connected at the top end of the base (13), and the control panel assembly (15) is connected with a left transverse moving oil cylinder assembly (3), a right transverse moving oil cylinder assembly (4), a left jacking oil cylinder assembly (5) and a right jacking oil cylinder assembly (6).
3. The pressure testing machine of the flange type pressure gauge according to claim 2, characterized in that: the pressure testing medium input control unit comprises an inlet tee joint (9) and a pressure testing pipeline (10), the inlet tee joint (9) comprises a left opening (9-1), a right opening (9-2) and a medium opening (9-3), the left opening (9-1) is communicated with a left pressure testing flange (7) through the pressure testing pipeline (10), the right opening (9-2) is communicated with a right pressure testing flange (8) through the pressure testing pipeline (10), and the medium opening (9-3) is communicated with a hydraulic station (14).
4. The pressure testing machine of the flange type pressure gauge according to claim 3, characterized in that: the pressure test medium input control unit further comprises a left cock (11) and a right cock (12), the left cock (11) is connected to a pressure test pipeline (10) between the left opening (9-1) and the left pressure test flange (7), the right cock (12) is connected to a pressure test pipeline (10) between the right opening (9-2) and the right pressure test flange (8), and the left cock (11) and the right cock (12) are respectively connected with the control unit.
5. The pressure testing machine of the flange type pressure gauge according to claim 1, characterized in that: the hydraulic unit further comprises a left flange type pressure gauge and a right flange type pressure gauge, the left flange type pressure gauge is connected to the left pressure testing flange (7), and the right flange type pressure gauge is connected to the right pressure testing flange (8).
6. The pressure testing machine of the flange type pressure gauge according to claim 5, characterized in that: the left jaw (1) comprises a first left petal body (1-1) and a first right petal body (1-2), the right jaw (2) comprises a second left petal body (2-1) and a second right petal body (2-2), the first left petal body (1-1), the first right petal body (1-2), the second left petal body (2-1) and the second right petal body (2-2) are semi-cylinders, the axle centers of the first left petal body (1-1) and the second left petal body (2-1) are recessed leftwards, the axle centers of the first right petal body (1-2) and the second right petal body (2-2) are recessed rightwards, the left pressure test flange (7) and the left jacking oil cylinder assembly (5) are located at the recessed position between the first left petal body (1-1) and the first right petal body (1-2), the right pressure test flange assembly (8) and the right jacking oil cylinder assembly (6) are located between the second left petal body (2-1) and the second right petal body (2-2) -2) recesses in between.
7. The pressure testing machine of the flange type pressure gauge according to claim 6, characterized in that: the left transverse moving oil cylinder assembly (3) comprises a first left piston rod (3-1) and a first right piston rod (3-2), the left end of the first left piston rod (3-1) and the right end of the first right piston rod (3-2) are both connected with the base (13), the right end of the first left piston rod (3-1) is connected with the left side of the first left valve body (1-1), and the left end of the first right piston rod (3-2) is connected with the right side of the first right valve body (1-2); the right transverse moving oil cylinder assembly (4) comprises a second left piston rod (4-1) and a second right piston rod (4-2), the left end of the second left piston rod (4-1) and the right end of the second right piston rod (4-2) are both connected with the base (13), the right end of the second left piston rod (4-1) is connected with the left side of the second left valve body (2-1), and the left end of the second right piston rod (4-2) is connected with the right side of the second right valve body (2-2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810619812.2A CN108871960B (en) | 2018-06-15 | 2018-06-15 | Flange type pressure testing machine for pressure gauge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810619812.2A CN108871960B (en) | 2018-06-15 | 2018-06-15 | Flange type pressure testing machine for pressure gauge |
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| CN108871960B true CN108871960B (en) | 2021-01-29 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202267569U (en) * | 2011-08-30 | 2012-06-06 | 安徽蓝德仪表有限公司 | Overpressure resistant tester for compression gauge |
| CN103105264A (en) * | 2013-02-04 | 2013-05-15 | 侯如升 | Pressure meter mounting base for pressure testing machine |
| CN204115993U (en) * | 2014-09-15 | 2015-01-21 | 中国石油天然气股份有限公司 | Christmas tree gate valve pressure test chuck |
| CN204142416U (en) * | 2014-10-30 | 2015-02-04 | 中国神华能源股份有限公司 | Flange form calibration device for pressure gauge |
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Effective date of registration: 20201028 Address after: 100007 Dongcheng District, Dongzhimen, China, North Street, No. 9 Oil Mansion, No. Applicant after: CHINA NATIONAL PETROLEUM Corp. Applicant after: CNPC CHUANQING DRILLING ENGINEERING Co.,Ltd. Address before: Weiyang road 710018 Shaanxi city of Xi'an province Changqing No. 151 building room 1902 Applicant before: CNPC CHUANQING DRILLING ENGINEERING CO., LTD. CHANGQING WELL DRILLING GENERAL Co. |
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