CN210833999U - Micro-differential pressure calibration device - Google Patents
Micro-differential pressure calibration device Download PDFInfo
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- CN210833999U CN210833999U CN201921555313.8U CN201921555313U CN210833999U CN 210833999 U CN210833999 U CN 210833999U CN 201921555313 U CN201921555313 U CN 201921555313U CN 210833999 U CN210833999 U CN 210833999U
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- 238000012360 testing method Methods 0.000 claims description 16
- 239000004800 polyvinyl chloride Substances 0.000 claims description 10
- 238000012795 verification Methods 0.000 claims description 10
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 8
- 230000003116 impacting effect Effects 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
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Abstract
The utility model provides a micro differential pressure calibration device, which comprises a pressure chamber for connecting a pressure pump, a pressure dividing valve for dividing the pressure chamber into a positive pressure cavity and a negative pressure cavity, a positive pressure pipe for connecting one end of a micro differential pressure instrument to be tested and a negative pressure pipe for connecting the other end of the micro differential pressure instrument to be tested; the positive pressure cavity is communicated with the pressure pump, the positive pressure pipe is communicated with the positive pressure cavity, and the negative pressure pipe is communicated with the negative pressure cavity; and a first pressure gauge for displaying the pressure of the positive pressure cavity and a second pressure gauge for displaying the pressure of the negative pressure cavity are arranged on the pressure chamber. The utility model provides a micro differential pressure calibration device which can effectively reduce the adjusting difficulty of obtaining micro differential pressure; and the two ends of the micro differential pressure instrument to be measured can be simultaneously pressed and then the micro differential pressure is adjusted, so that the pressure pump is effectively prevented from directly impacting the micro differential pressure instrument to be measured, the risk of damaging the micro differential pressure instrument to be measured is reduced, and the problem of difficulty in field calibration of the micro differential pressure instrument is effectively solved.
Description
Technical Field
The utility model belongs to the technical field of pressure measurement, more specifically say, relate to a little differential pressure calibration equipment.
Background
In the maintenance operation of the nuclear power station, a large number of instruments need to be regularly checked and maintained, wherein when the micro differential pressure instrument is checked and maintained, the micro differential pressure instrument is generally checked on site by using a handheld pneumatic pump or is dismounted into a laboratory for checking. However, in the actual operation process, the field calibration of the handheld pneumatic pump is easily interfered, the adjustment difficulty is high, the calibration is difficult, the time and the labor are wasted when the micro differential pressure instrument is disassembled back to a laboratory for calibration, the instrument with radiation pollution cannot be applied, and the instrument can be damaged in the processes of disassembly, assembly and transportation.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a little differential pressure calibration equipment to solve the problem of little differential pressure instrument field check-up difficulty among the prior art.
In order to achieve the above object, the utility model adopts the following technical scheme: the micro differential pressure calibration device comprises a pressure chamber, a pressure dividing valve, a positive pressure pipe and a negative pressure pipe, wherein the pressure chamber is used for being connected with a pressure pump, the pressure dividing valve is used for dividing the pressure chamber into a positive pressure cavity and a negative pressure cavity, the positive pressure pipe is used for being connected to one end of a micro differential pressure instrument to be tested, and the negative pressure pipe is used for being connected to the other end of the micro differential pressure instrument to; the positive pressure cavity is communicated with the pressure pump, the positive pressure pipe is communicated with the positive pressure cavity, and the negative pressure pipe is communicated with the negative pressure cavity; and a first pressure gauge for displaying the pressure of the positive pressure cavity and a second pressure gauge for displaying the pressure of the negative pressure cavity are arranged on the pressure chamber.
Further, the volume of the positive pressure chamber is larger than the volume of the negative pressure chamber.
Further, the pressure chamber is a polyvinyl chloride pressure chamber.
Further, the positive pressure pipe and the negative pressure pipe are both rigid pipes.
Further, the positive pressure pipe is a polyvinyl chloride positive pressure pipe, and the negative pressure pipe is a polyvinyl chloride negative pressure pipe.
Furthermore, a first metal threaded seat corresponding to the micro differential pressure instrument to be detected is arranged on the positive pressure pipe; and a second metal threaded seat corresponding to the micro differential pressure instrument to be detected is arranged on the negative pressure pipe.
Furthermore, a rigid air inlet pipe which is communicated with the positive pressure cavity and is used for being connected with the pressure pump is arranged on the pressure chamber.
Further, the pressure chamber comprises a positive pressure chamber and a negative pressure chamber, wherein a positive pressure cavity is formed in the positive pressure chamber, a negative pressure cavity is formed in the negative pressure chamber, and the partial pressure valve is arranged between the positive pressure chamber and the negative pressure chamber.
Furthermore, a first test tube connected to the first pressure gauge is arranged on the positive pressure chamber, and a second test tube connected to the second pressure gauge is arranged on the negative pressure chamber; the positive pressure pipe is arranged on the positive pressure test pipe, and the negative pressure pipe is arranged on the second test pipe.
Furthermore, the positive pressure pipe and the negative pressure pipe are both provided with filters.
Compared with the prior art, the micro-differential pressure calibration device provided by the utility model can inflate and pressurize the pressure chamber through the pressure pump because the pressure chamber is connected to the pressure pump; the pressure chamber is provided with a positive pressure pipe communicated to the positive pressure cavity and a negative pressure pipe communicated to the negative pressure cavity, the positive pressure pipe is connected to one end of the micro differential pressure instrument to be detected, and the negative pressure pipe is connected to the other end of the micro differential pressure instrument to be detected; therefore, when the micro differential pressure instrument is checked, the pressure chamber can be inflated and pressurized through the pressure pump, and the pressure dividing valve is arranged, so that the pressure dividing valve can be opened, and two ends of the micro differential pressure instrument to be tested can be simultaneously pressurized; and then, the pressure pump can be adjusted to increase the pressure of the positive pressure cavity, so that the two ends of the micro differential pressure instrument to be tested are pressed inconsistently, the pressure difference value of the positive pressure cavity and the negative pressure cavity can be obtained by reading the first pressure gauge and the second pressure gauge, and the micro differential pressure instrument to be tested is verified. When the micro differential pressure calibration device is used for calibrating a micro differential pressure instrument, on one hand, the pressure can be changed to obtain the micro differential pressure calibration condition by being connected to the positive pressure cavity of the pressure pump, so that the adjustment difficulty is effectively reduced; on the other hand, due to the fact that the pressure dividing valve is arranged, the two ends of the micro differential pressure instrument to be measured can be simultaneously pressed through the pressure dividing valve, then micro differential pressure adjustment is conducted, the situation that a pressure pump directly impacts the micro differential pressure instrument to be measured is effectively avoided, the risk of damaging the micro differential pressure instrument to be measured is reduced, and the problem that the micro differential pressure instrument is difficult to check on site is effectively solved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a block diagram of a micro differential pressure calibration apparatus provided in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a pressure chamber according to an embodiment of the present invention;
fig. 3 is a schematic layout view of a connection pipe according to an embodiment of the present invention.
Wherein, in the figures, the respective reference numerals:
1-a pressure chamber; 11-positive pressure cavity; 12-a negative pressure chamber; 13-a positive pressure chamber; 131-a first test tube; 14-a negative pressure chamber; 141-a second test tube; 15-connecting pipe; 2-a pressure dividing valve; 3-a positive pressure pipe; 4-a negative pressure pipe; 5-a first pressure gauge; 6-a second pressure gauge; 7-rigid air inlet pipe; 100-micro differential pressure instrument to be measured.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
Referring to fig. 1, a micro differential pressure calibration apparatus provided in a preferred embodiment of the present invention is shown, and is used for calibrating a micro differential pressure instrument, including a pressure chamber 1, a pressure dividing valve 2, a positive pressure pipe 3 and a negative pressure pipe 4; the pressure chamber 1 is connected to a pressure pump, the pressure dividing valve 2 is used for dividing the pressure chamber 1 into a positive pressure cavity 11 and a negative pressure cavity 12, the positive pressure cavity 11 is communicated with the pressure pump, the positive pressure pipe 3 is communicated with the positive pressure cavity 11 and used for being connected to one end of a micro differential pressure instrument 100 to be tested, and the negative pressure pipe 4 is communicated with the negative pressure cavity 12 and used for being connected to the other end of the micro differential pressure instrument 100 to be tested; the pressure chamber 1 is provided with a first pressure gauge 5 for displaying the pressure of the positive pressure cavity 11 and a second pressure gauge 6 for displaying the pressure of the negative pressure cavity 12.
In the micro differential pressure calibration device, the pressure chamber 1 is connected to the pressure pump, so that the pressure chamber 1 can be inflated and pressurized through the pressure pump; moreover, the partial pressure valve 2 is arranged, the partial pressure valve 2 can divide the pressure chamber 1 into a positive pressure cavity 11 and a negative pressure cavity 12, the pressure chamber 1 is provided with a positive pressure pipe 3 communicated to the positive pressure cavity 11 and a negative pressure pipe 4 communicated to the negative pressure cavity 12, the positive pressure pipe 3 is connected to one end of the micro differential pressure instrument 100 to be tested, and the negative pressure pipe 4 is connected to the other end of the micro differential pressure instrument 100 to be tested; therefore, when the micro differential pressure instrument is checked, the pressure chamber 1 can be inflated and pressurized through the pressure pump, and the pressure dividing valve 2 is arranged, so that the pressure dividing valve 2 can be opened, and two ends of the micro differential pressure instrument 100 to be tested can be simultaneously pressurized; and then the pressure divider valve 2 can be used for separating to form a positive pressure cavity 11 and a negative pressure cavity 12, and the pressure pump is adjusted to increase the pressure of the positive pressure cavity 11, so that the pressure at the two ends of the micro differential pressure instrument 100 to be tested is inconsistent, a micro differential pressure calibration condition is obtained, the pressure difference value of the positive pressure cavity 11 and the negative pressure cavity 12 can be obtained by reading the first pressure gauge 5 and the second pressure gauge 6, and the micro differential pressure instrument 100 to be tested is calibrated. When the micro differential pressure calibration device is used for calibrating a micro differential pressure instrument, on one hand, the pressure is changed through the positive pressure cavity 11 connected to the pressure pump to obtain the micro differential pressure calibration condition, so that the adjustment difficulty is effectively reduced; on the other hand is equipped with partial pressure valve 2, can make the little differential pressure instrument 100's that awaits measuring both ends pressurized simultaneously earlier through partial pressure valve 2 and carry out little differential pressure's regulation again, effectively avoided the force pump direct impact little differential pressure instrument 100 that awaits measuring, reduced the risk of damaging little differential pressure instrument 100 that awaits measuring, effectively solved the problem of little differential pressure instrument on-the-spot check-up difficulty.
Specifically, the volume of positive pressure chamber 11 is greater than the volume of negative pressure chamber 12, because utilize positive pressure chamber 11 to realize obtaining the differential pressure test condition, consequently make positive pressure chamber 11 more big enough reduce the regulation degree of difficulty more, consequently increase the volume of positive pressure chamber 11, the volume that reduces negative pressure chamber 12 makes the volume of positive pressure chamber 11 be greater than the volume of negative pressure chamber 12 can effectively reduce the regulation degree of difficulty and reduce whole differential pressure verifying attachment's volume simultaneously, portable is applicable to the field verification operation.
Specifically, the pressure chamber 1 is a polyvinyl chloride pressure chamber 1. Similarly, the positive pressure pipe 3 is a polyvinyl chloride positive pressure pipe 3, and the negative pressure pipe 4 is a polyvinyl chloride negative pressure pipe 4. Therefore, the pressure chamber 1, the positive pressure pipe 3 and the negative pressure pipe 4 are made of polyvinyl chloride (PVC), so that the manufacturing and production cost is reduced, the weight of the micro-differential pressure calibration device can be effectively reduced, the carrying is convenient, and the field calibration operation can be effectively adapted.
More specifically, the positive pressure pipe 3 and the negative pressure pipe 4 are both rigid pipes. The positive pressure pipe 3 and the negative pressure pipe 4 are rigid pipes, namely the positive pressure pipe 3 and the negative pressure pipe 4 can not be bent in the checking process, so that the disturbance to the micro differential pressure instrument 100 to be checked can be effectively reduced, and the checking precision is effectively improved.
Specifically, the positive pressure pipe 3 is provided with a first metal threaded seat corresponding to the micro differential pressure instrument 100 to be measured; and a second metal threaded seat corresponding to the micro differential pressure instrument 100 to be detected is arranged on the negative pressure pipe 4. Like this, be provided with first metal thread seat and can be convenient for positive pressure pipe 3 and the little differential pressure instrument 100's that awaits measuring be connected and guarantee the connection effect, likewise, be provided with second metal thread seat and can be convenient for negative pressure pipe 4 and the little differential pressure instrument 100's that awaits measuring be connected and guarantee the connection effect.
Specifically, a rigid air inlet pipe 7 which is communicated with the positive pressure cavity 11 and is used for being connected with a pressure pump is arranged on the pressure chamber 1. Pressure chamber 1 is used for also being rigid with the intake pipe of force pump promptly to the intake pipe is also inflexible at the verification in-process, can effectively reduce the disturbance to the little differential pressure instrument 100 that awaits measuring, effectively improves the verification accuracy.
Referring to fig. 2, specifically, the pressure chamber 1 includes a positive pressure chamber 13 formed with a positive pressure cavity 11 and a negative pressure chamber 14 formed with a negative pressure cavity 12, and the pressure dividing valve 2 is disposed between the positive pressure chamber 13 and the negative pressure chamber 14. Namely, the positive pressure chamber 13 and the negative pressure chamber 14 can be respectively arranged, the positive pressure chamber 13 is connected to one end of the pressure dividing valve 2, and the negative pressure chamber 14 is connected to the other end of the pressure dividing valve 2, so that the pressure chamber 1 is simple in structure and easy to manufacture, and the production cost is effectively reduced.
Specifically, a first testing tube 131 connected to the first pressure gauge 5 is arranged on the positive pressure chamber 13, and a second testing tube 141 connected to the second pressure gauge 6 is arranged on the negative pressure chamber 14; the positive pressure pipe 3 is arranged on the positive pressure test pipe, and the negative pressure pipe 4 is arranged on the second test pipe 141. More specifically, the rigid air inlet pipe 7 may also be directly disposed on the first test pipe 131, so that the micro differential pressure verification apparatus has a simple structure and is easy to mold. More specifically, the positive pressure pipe 3 and the negative pressure pipe 4 are both provided with filters, so that the micro differential pressure instrument 100 to be tested can be prevented from being polluted when the micro differential pressure instrument 100 to be tested is verified.
Of course, in another embodiment, please refer to fig. 3, the pressure chamber 1 may further include a connecting pipe 15 connecting the positive pressure chamber 13 and the negative pressure chamber 14, and the pressure divider 2 is disposed on the connecting pipe 15, so that when the volumes of the positive pressure chamber 13 and the negative pressure chamber 14 are larger, the pressure divider 2 may be disposed by disposing a smaller connecting pipe 15, so as to reduce the volume of the pressure divider 2 and facilitate the opening and closing of the pressure divider 2.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A micro differential pressure calibration device is used for calibrating a micro differential pressure instrument and is characterized by comprising a pressure chamber, a pressure dividing valve, a positive pressure pipe and a negative pressure pipe, wherein the pressure chamber is used for being connected with a pressure pump, the pressure dividing valve is used for dividing the pressure chamber into a positive pressure cavity and a negative pressure cavity, the positive pressure pipe is used for being connected to one end of the micro differential pressure instrument to be tested, and the negative pressure pipe is used for being connected to the other end of the micro differential; the positive pressure cavity is communicated with the pressure pump, the positive pressure pipe is communicated with the positive pressure cavity, and the negative pressure pipe is communicated with the negative pressure cavity; and a first pressure gauge for displaying the pressure of the positive pressure cavity and a second pressure gauge for displaying the pressure of the negative pressure cavity are arranged on the pressure chamber.
2. The micro differential pressure verification device of claim 1, wherein the volume of the positive pressure chamber is greater than the volume of the negative pressure chamber.
3. The micro differential pressure verification device of claim 1, wherein the pressure chamber is a polyvinyl chloride pressure chamber.
4. The micro differential pressure calibration device according to claim 1, wherein the positive pressure tube and the negative pressure tube are rigid tubes.
5. The micro-differential pressure calibration device according to claim 4, wherein the positive pressure pipe is a polyvinyl chloride positive pressure pipe, and the negative pressure pipe is a polyvinyl chloride negative pressure pipe.
6. The micro differential pressure calibration device according to claim 5, wherein the positive pressure pipe is provided with a first metal threaded seat corresponding to the micro differential pressure instrument to be tested; and a second metal threaded seat corresponding to the micro differential pressure instrument to be detected is arranged on the negative pressure pipe.
7. The micro differential pressure verification device according to claim 1, wherein a rigid air inlet pipe communicated with the positive pressure cavity and used for being connected with a pressure pump is arranged on the pressure chamber.
8. The micro differential pressure verification apparatus according to claim 1, wherein the pressure chamber includes a positive pressure chamber formed with a positive pressure cavity and a negative pressure chamber formed with a negative pressure cavity, and the pressure dividing valve is provided between the positive pressure chamber and the negative pressure chamber.
9. The micro differential pressure verification device according to claim 8, wherein a first test tube connected to the first pressure gauge is provided on the positive pressure chamber, and a second test tube connected to the second pressure gauge is provided on the negative pressure chamber; the positive pressure pipe is arranged on the positive pressure test pipe, and the negative pressure pipe is arranged on the second test pipe.
10. The micro differential pressure verification apparatus according to claim 1, wherein a filter is disposed on each of the positive pressure pipe and the negative pressure pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921555313.8U CN210833999U (en) | 2019-09-18 | 2019-09-18 | Micro-differential pressure calibration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921555313.8U CN210833999U (en) | 2019-09-18 | 2019-09-18 | Micro-differential pressure calibration device |
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| Publication Number | Publication Date |
|---|---|
| CN210833999U true CN210833999U (en) | 2020-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921555313.8U Active CN210833999U (en) | 2019-09-18 | 2019-09-18 | Micro-differential pressure calibration device |
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| CN (1) | CN210833999U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112284610A (en) * | 2020-10-14 | 2021-01-29 | 山东交通学院 | Gas tank for detecting automobile pressure sensor |
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2019
- 2019-09-18 CN CN201921555313.8U patent/CN210833999U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112284610A (en) * | 2020-10-14 | 2021-01-29 | 山东交通学院 | Gas tank for detecting automobile pressure sensor |
| CN112284610B (en) * | 2020-10-14 | 2022-03-01 | 山东交通学院 | Gas tank for detecting automobile pressure sensor |
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