CN220960431U - Vacuum pressure gauge calibration stand - Google Patents
Vacuum pressure gauge calibration stand Download PDFInfo
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- CN220960431U CN220960431U CN202322877983.4U CN202322877983U CN220960431U CN 220960431 U CN220960431 U CN 220960431U CN 202322877983 U CN202322877983 U CN 202322877983U CN 220960431 U CN220960431 U CN 220960431U
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- hand wheel
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- 239000007788 liquid Substances 0.000 claims abstract description 25
- 238000003860 storage Methods 0.000 claims abstract description 18
- 238000007789 sealing Methods 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000010963 304 stainless steel Substances 0.000 claims description 3
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 claims description 3
- 239000008213 purified water Substances 0.000 claims description 3
- 239000012780 transparent material Substances 0.000 claims description 3
- 239000003344 environmental pollutant Substances 0.000 abstract description 7
- 231100000719 pollutant Toxicity 0.000 abstract description 7
- 238000012360 testing method Methods 0.000 description 21
- 238000006073 displacement reaction Methods 0.000 description 6
- 238000012795 verification Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 238000004164 analytical calibration Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000009972 noncorrosive effect Effects 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
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- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
Abstract
The utility model aims at solving the problem that a one-way valve is easy to be polluted by pollutants in a medium and has reduced sealing performance, and provides a vacuum pressure gauge checking table which comprises two booster cylinders, a pressure output port, a liquid storage tank and a pressure relief valve; the two pressurizing cylinders are communicated, and the standard pressure gauge and the pressure gauge to be checked are connected to the pressure output port in a sealing manner. The check table does not need to be provided with a check valve, and the problem that in the prior art, the check valve is polluted by pollutants in a medium, so that the sealing performance of the check valve is reduced, and the pressure of a pressure generating system is insufficient and even cannot be generated is solved.
Description
Technical Field
The utility model relates to the technical field of pressure instrument calibration, in particular to a vacuum pressure gauge calibration stand.
Background
The pressure measurement is one of main parameters of process control of the industrial production device, and in order to ensure that the detection parameters are accurate, the performance of the instrument meets the design requirement, and the national standard requires that the instrument adopted by the production device is subjected to test and verification;
In the aspect of instrument test and verification, the pressure instrument occupies the most of the tested devices, the standard instrument is the most complete, the test working hour is the longest, namely the occupied resources are the largest. The test verification range of the existing pressure instrument test bench is fixed, classification test can not be carried out on pressure instruments with different pressure gradients, and the accuracy of the test bench with large pressure values can not be ensured when the test bench with small pressure values is used for testing and verifying the pressure instruments with small pressure values;
The China patent with the application number 201820241368.0 discloses a pressure instrument test board based on a hydraulic system, which comprises an oil tank, an oil pump, a motor, a one-way valve, a filter and a test unit; the test unit comprises a first standard pressure gauge, a first throttle valve, a second throttle valve and a test interface; the first throttle valve is connected with the second throttle valve, and a first standard pressure gauge and a test interface are sequentially arranged on a pipeline between the first throttle valve and the second throttle valve; the plurality of test units are connected in parallel to form a test unit group, the oil tank is sequentially connected with the oil pump, the one-way valve and the filter, the oil inlet of the first throttle valve is connected with the filter, and the oil outlet of the second throttle valve is connected with the oil tank. According to the hydraulic system, the pressure values on different test units are different by setting the pressure of the first throttle valve, and when the pressure meter is tested and checked, the corresponding test unit is selected according to the pressure value of the pressure meter to carry out test and check, so that the test and check precision of the pressure meter is improved;
However, the device still has some defects in the actual use process: the test bench has used the check valve in many places, and the self structure of check valve leads to its pollutant pollution in being polluted by the medium easily, and the sealing performance of check valve descends, leads to making the problem that pressure system pressure is not enough even unable to make the Y.
There is an urgent need for redesign to solve the above-described problems.
Disclosure of utility model
The utility model aims to provide a vacuum pressure gauge calibration table aiming at the problem that a check valve is easy to be polluted by pollutants in a medium and the sealing performance is reduced.
The utility model provides a vacuum pressure gauge calibration stand, which comprises a primary booster cylinder, a primary booster hand wheel, a secondary booster cylinder, a secondary booster hand wheel, a standard pressure gauge interface, a pressure output port, a liquid storage tank and a pressure relief valve, wherein the primary booster hand wheel is connected with the primary booster cylinder; the primary pressure cylinder and the secondary pressure cylinder are fixedly arranged on the checking platform, a pipeline for communicating the primary pressure cylinder and the secondary pressure cylinder is arranged between pressure cavities of the primary pressure cylinder and the secondary pressure cylinder, the primary pressure hand wheel is rotationally connected to the primary pressure cylinder, when the primary pressure hand wheel is rotated, the pressure cavity of the primary pressure cylinder is increased, the secondary pressure hand wheel is rotationally connected to the secondary pressure cylinder, when the secondary pressure hand wheel is rotated, the pressure cavity of the secondary pressure cylinder is increased, the inner diameter of the primary pressure cylinder is larger than the inner diameter of the secondary pressure cylinder, a standard pressure meter interface is arranged on a pipeline between the pressure cavities of the primary pressure cylinder and the secondary pressure cylinder, the standard pressure meter is in sealing connection with the standard pressure meter interface, a pressure output port is further arranged on a pipeline between the pressure cavities of the primary pressure cylinder and the secondary pressure cylinder, the checked pressure meter is detachably and sealingly connected to the pressure output port, a liquid storage tank for storing pressure medium is further arranged on the pipeline between the pressure cavities of the primary pressure cylinder and the secondary pressure cylinder, and the top end of the liquid storage tank is fixedly provided with a pressure release valve.
Optionally, the calibration stand further comprises a plug, and the plug is detachably and hermetically connected to the pressure output port.
Optionally, the checking platform further comprises a plug, and the plug is arranged at one end of the primary booster cylinder and one end of the secondary booster cylinder, which are far away from the booster hand wheel, in a sealing manner.
Alternatively, the pressure medium is purified water or oil.
Optionally, the pressure-making strength of the primary pressure-increasing cylinder is 0-4MPa, and the pressure-making strength of the secondary pressure-increasing cylinder is 0-70MPa.
Optionally, the whole check table is made of 304 stainless steel.
Optionally, the liquid storage tank is made of transparent materials.
Optionally, the liquid storage tank comprises an upper cover, a base and a tank body, wherein the upper cover and the base are respectively detachably and hermetically connected to the upper end and the lower end of the tank body.
The beneficial effects of the utility model are as follows: the check table is not provided with the check valve, so that the problems that in the prior art, the pressure of a pressure generating system is insufficient and even cannot be generated due to the fact that the check valve is polluted by pollutants in a medium, the sealing performance of the check valve is reduced are solved, and the diameter of a primary pressure cylinder is larger than that of a secondary pressure cylinder, so that the displacement of the primary pressure cylinder is large, a pressure medium can be rapidly output, the whole system is full of the primary pressure, initial pressure is generated, and when the primary pressure hand wheel is rotated to feel laborious, the secondary pressure hand wheel is rotated again to continuously boost the pressure until the rated use maximum pressure of equipment is reached; the check table realizes the purposes of quick and labor-saving lifting and lowering and improves the working efficiency through the combined design of the low-pressure large-displacement primary booster cylinder and the high-pressure small-displacement secondary booster cylinder.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic perspective view of the whole calibration stand;
FIG. 2 is an enlarged view at A in FIG. 1;
Fig. 3 is an enlarged view at B in fig. 1.
Reference numerals indicate, 1, a first-stage booster cylinder; 2. a primary supercharging hand wheel; 3. a secondary boost cylinder; 4. a secondary supercharging hand wheel; 5. a standard pressure gauge interface; 6. a pressure outlet; 7. a liquid storage tank; 8. and a pressure release valve.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the utility model. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
A vacuum pressure gauge calibration stand, as shown in fig. 1-3, comprising: the device comprises a primary booster cylinder 1, a primary booster hand wheel 2, a secondary booster cylinder 3, a secondary booster hand wheel 4, a standard pressure gauge interface 5, a pressure output port 6, a liquid storage tank 7 and a pressure relief valve 8; the primary pressure cylinder 1 and the secondary pressure cylinder 3 are fixedly arranged on the checking platform, a pipeline for communicating the primary pressure cylinder 1 and the secondary pressure cylinder 3 is arranged between pressure cavities of the primary pressure cylinder 1 and the secondary pressure cylinder 3, the primary pressure hand wheel 2 is rotationally connected with the primary pressure cylinder 1, when the primary pressure hand wheel 2 is rotated, the pressure cavity of the primary pressure cylinder 1 is increased, the secondary pressure hand wheel 4 is rotationally connected with the secondary pressure cylinder 3, when the secondary pressure hand wheel 4 is rotated, the pressure cavity of the secondary pressure cylinder 3 is increased, the inner diameter of the primary pressure cylinder 1 is larger than the inner diameter of the secondary pressure cylinder 3, the inner diameter of the primary pressure cylinder 1 is preferably 25 mm, the inner diameter of the secondary pressure cylinder 3 is preferably 8 mm, a standard pressure meter interface 5 is preferably arranged in the middle of the pipeline to obtain more stable pressure, a pipe outlet 6 between the pressure cavities of the primary pressure cylinder 1 and the secondary pressure cylinder 3 is also arranged on the pressure meter interface 5, a pressure outlet 6 is also arranged on the pressure cylinder 7 and is also arranged on the pressure cylinder 7, and a pressure tank 7 is also arranged on the pressure cylinder 7 and is connected with a pressure tank 7, and a pressure tank 7 is also arranged on the pressure tank 7, and a pressure tank 7 is arranged on the pressure tank 7 and is used for checking medium; the check table is not provided with the check valve, so that the problems that in the prior art, the pressure of a pressure generating system is insufficient and even cannot be generated due to the fact that the check valve is polluted by pollutants in a medium, the sealing performance of the check valve is reduced are solved radically, and the diameter of a primary booster cylinder 1 is larger than that of a secondary booster cylinder 3, so that the displacement of the primary booster cylinder 1 is large, a pressure medium can be rapidly output, the whole system is full of the primary pressure, the primary pressure is generated, and when the primary booster hand wheel 2 is rotated to feel laborious, the secondary booster hand wheel 4 is rotated again to continuously boost the pressure until the rated maximum pressure of the equipment is used; the check table is designed by combining the low-pressure large-displacement primary booster cylinder 1 and the high-pressure small-displacement secondary booster cylinder 3, so that the purposes of quick and labor-saving lifting and lowering are realized, and the working efficiency is improved.
Further, the check table further comprises a plug which is detachably and hermetically connected to the pressure output port 6, and when the check table is in a non-working state, the plug plays a role in sealing the pressure output port 6 to prevent dust and sundries from entering the system from the pressure output port 6 to pollute a pressure medium.
Furthermore, the check table further comprises a plug, the plug is arranged at one end of the primary booster cylinder 1 and the secondary booster cylinder 3, which are far away from the booster hand wheel, in a normal state, and the plug is detached when the cleaning system is in use, so that the check table is convenient to clean.
The pressure medium is purified water or oil, and can be other non-corrosive liquid medium.
Wherein the pressure-making strength of the primary pressure-increasing cylinder 1 is 0-4MPa, and the pressure-making strength of the secondary pressure-increasing cylinder 3 is 0-70MPa.
Preferably, the whole check table is made of 304 stainless steel, and the problem that the existing equipment is made of carbon steel and is easy to corrode is solved.
Preferably, the liquid storage tank 7 is made of transparent material, preferably acrylic, so that the liquid level of the pressure medium can be conveniently observed, and the liquid can be conveniently observed in the absence of liquid, so that liquid can be timely supplemented.
Preferably, the liquid storage tank 7 comprises an upper cover, a base and a tank body, wherein the upper cover and the base are respectively detachably and hermetically connected to the upper end and the lower end of the tank body, the liquid storage tank 7 is used for precipitating pollutants, impurities and the like generated in the working process, and the problem that the liquid storage tank 7 is inconvenient to clean is solved by the split design of the liquid storage tank 7.
When in use, the check table is firstly placed at the horizontal position, so that the medium liquid level in the liquid storage tank 7 is ensured to be about half of the height of the oil cup. And removing the plug, and respectively connecting the standard instrument and the calibrated instrument to the standard pressure gauge interface 5 and the pressure output port 6. And opening a pressure relief valve on the oil cup anticlockwise for pressure relief, screwing the primary booster pump and the secondary booster cylinder 3 out anticlockwise for 10-12 cm, and lowering the liquid level of the liquid storage tank 7 at the moment, so that a medium enters the system.
When the pressure gauge of 0-4MPa is checked, the pressure relief valve is closed clockwise, the primary booster hand wheel 1 on the right primary booster cylinder 1 is rotated clockwise, and reading check is carried out after the pressure of the pressure gauge is observed to rise to the required pressure, at the moment, the left secondary booster cylinder can be used for fine adjustment until the full range of the checked instrument. During return checking, the primary booster hand wheel 1 on the right primary booster cylinder 1 is rotated anticlockwise, reading checking is carried out after the pressure gauge pressure is reduced to the required pressure, and at the moment, the left booster pump can be used for fine adjustment. Repeating the steps until the indication value of the pressure gauge is zero, completing the verification, and detaching the pressure gauge to be detected after opening the pressure relief valve.
When checking a 0-60 pressure gauge, closing a pressure relief valve clockwise, rotating a first-stage booster hand wheel 1 on a right-side first-stage booster cylinder 1 clockwise, observing that the pressure of the pressure gauge rises to a required pressure value, and then performing reading check, wherein at the moment, a left-side second-stage booster cylinder 3 can be used for fine adjustment, the maximum pressure can reach 4MPa or higher, and the rotation of the first-stage booster hand wheel 1 on the first-stage booster cylinder 1 is stopped until the effort is felt; and the secondary supercharging hand wheel 4 on the left secondary supercharging cylinder 3 is rotated to continue supercharging, and reading and checking are carried out until the full range of the instrument after the pressure of the pressure gauge is observed to rise to the required pressure value. During return checking, the secondary supercharging hand wheel 4 on the secondary supercharging cylinder 3 is firstly rotated anticlockwise. After the pressure of the pressure gauge is observed to be reduced to a required pressure value, reading and checking are carried out; when the secondary booster hand wheel 4 on the secondary booster cylinder 3 is retracted to be motionless and the pressure is not reduced, the primary booster hand wheel 1 on the primary booster cylinder 1 is rotated anticlockwise until the pointers of the standard pressure gauge and the detected pressure gauge are zeroed, after the verification is completed, a pressure relief valve is opened, and the detected pressure gauge is dismounted;
When the vacuum gauge is checked, the plug is removed, and the standard gauge and the checked gauge are respectively connected to the standard pressure gauge interface 5 and the pressure output port 6. Opening a pressure relief valve on the oil cup anticlockwise, and screwing the hand wheels of the primary pressure cylinder 1 and the secondary pressure cylinder 3 to the end clockwise; closing the pressure relief valve, slowly rotating the secondary pressurizing hand wheel 4 on the primary pressurizing cylinder 3 and the secondary pressurizing cylinder anticlockwise to obtain vacuum pressure, and after observing that the pressure of the pressure gauge reaches the required pressure, performing reading verification; until-90 kPa (90% of the local atmospheric pressure) of the checked instrument is checked, the primary booster hand wheel 1 on the primary booster cylinder 1 and the secondary booster hand wheel 4 on the secondary booster cylinder 3 are slowly screwed in clockwise during return check, at the moment, the vacuum pressure value is reduced, and after the pressure gauge is observed to be reduced to the required pressure value, reading check is carried out; until the checked instrument returns to zero; and opening the pressure relief valve, and detaching the pressure gauge to be detected.
After the use is finished, the plug is arranged to prevent sundries from entering the system and clean water, oil and other dirt on the instrument.
The foregoing description is only of embodiments of the present utility model, and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes using the descriptions and the drawings of the present utility model or directly or indirectly applied to other related technical fields are included in the scope of the present utility model.
Claims (8)
1. A vacuum pressure gauge calibration stand, comprising: the device comprises a primary booster cylinder, a primary booster hand wheel, a secondary booster cylinder, a secondary booster hand wheel, a standard pressure gauge interface, a pressure output port, a liquid storage tank and a pressure relief valve; the primary pressure cylinder and the secondary pressure cylinder are fixedly arranged on the checking platform, a pipeline for communicating the primary pressure cylinder and the secondary pressure cylinder is arranged between pressure cavities of the primary pressure cylinder and the secondary pressure cylinder, the primary pressure hand wheel is rotationally connected to the primary pressure cylinder, when the primary pressure hand wheel is rotated, the pressure cavity of the primary pressure cylinder is increased, the secondary pressure hand wheel is rotationally connected to the secondary pressure cylinder, when the secondary pressure hand wheel is rotated, the pressure cavity of the secondary pressure cylinder is increased, the inner diameter of the primary pressure cylinder is larger than the inner diameter of the secondary pressure cylinder, a standard pressure meter interface is arranged on a pipeline between the pressure cavities of the primary pressure cylinder and the secondary pressure cylinder, the standard pressure meter is in sealing connection with the standard pressure meter interface, a pressure output port is further arranged on a pipeline between the pressure cavities of the primary pressure cylinder and the secondary pressure cylinder, the checked pressure meter is detachably and sealingly connected to the pressure output port, a liquid storage tank for storing pressure medium is further arranged on the pipeline between the pressure cavities of the primary pressure cylinder and the secondary pressure cylinder, and the top end of the liquid storage tank is fixedly provided with a pressure release valve.
2. The vacuum pressure gauge calibration stand of claim 1, further comprising a plug removably sealingly connected to the pressure outlet.
3. The vacuum pressure gauge calibration stand of claim 1, further comprising a plug, the plug being sealingly disposed at an end of the primary and secondary booster cylinders remote from the booster hand wheel.
4. The vacuum pressure gauge calibration stand of claim 1, wherein the pressure medium is purified water or oil.
5. The vacuum pressure gauge calibration stand of claim 1, wherein the primary booster cylinder has a build-up strength of 0-4MPa and the secondary booster cylinder has a build-up strength of 0-70MPa.
6. The vacuum pressure gauge calibration stand of claim 1, wherein the calibration stand is entirely of 304 stainless steel.
7. The vacuum pressure gauge calibration stand of claim 1, wherein the reservoir is a transparent material.
8. The vacuum pressure gauge calibration stand of claim 1, wherein the reservoir comprises an upper cover, a base and a tank body, the upper cover and the base being detachably and sealingly connected to the upper and lower ends of the tank body, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322877983.4U CN220960431U (en) | 2023-10-26 | 2023-10-26 | Vacuum pressure gauge calibration stand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322877983.4U CN220960431U (en) | 2023-10-26 | 2023-10-26 | Vacuum pressure gauge calibration stand |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220960431U true CN220960431U (en) | 2024-05-14 |
Family
ID=91012337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322877983.4U Active CN220960431U (en) | 2023-10-26 | 2023-10-26 | Vacuum pressure gauge calibration stand |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220960431U (en) |
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2023
- 2023-10-26 CN CN202322877983.4U patent/CN220960431U/en active Active
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