CN216278408U - Vacuum flow tester - Google Patents
Vacuum flow tester Download PDFInfo
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- CN216278408U CN216278408U CN202122703393.0U CN202122703393U CN216278408U CN 216278408 U CN216278408 U CN 216278408U CN 202122703393 U CN202122703393 U CN 202122703393U CN 216278408 U CN216278408 U CN 216278408U
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Abstract
The utility model provides a vacuum flow tester, which comprises a tester body and a vacuum pressure gauge; the outer shell of the tester body is cylindrical; one end of the shell is provided with a vacuum interface, and the other end of the shell is provided with an instrument interface; the interior of the hollow chamber forms a pressure balance chamber; a pressure stabilizing cylinder is fixed in the pressure balancing bin; the inner cavity of the pressure stabilizing cylinder is a hollow pressure stabilizing bin; one end of the pressure stabilizing cylinder is communicated with the instrument interface, and the other end of the pressure stabilizing cylinder is connected with a flow probe; the flow probe is hollow and long-strip-shaped, the inner cavity of the flow probe is communicated with the pressure stabilizing bin, and a detection hole is formed in one end of the flow probe, which is far away from the pressure stabilizing bin; the vacuum pressure gauge is communicated with the instrument interface; the shell of the tester body is also provided with a plurality of first air flow holes which are arranged at intervals and a first pressure regulating ring which is movably arranged; the first pressure regulating ring can slide on the shell in a reciprocating mode along the arrangement direction of the first air flow holes, and therefore the first air flow holes are covered or opened one by one. The product is used for testing the working state of the vacuum pump.
Description
Technical Field
The utility model relates to the technical field of vacuum technology test equipment, in particular to a vacuum flow tester.
Background
When the vacuum pump leaves the factory, the vacuumizing pressure and the air flow have corresponding standard values. The vacuum pump has long service life, the situation that the vacuumizing pressure cannot reach the standard value when leaving a factory easily occurs, and the vacuum pump needs to be replaced or maintained at the moment. Therefore, a detection instrument is required to periodically detect the working pressure value and the air flow rate of the vacuum pump so as to judge whether the vacuum pump can be used normally.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a vacuum flow tester which is used for detecting the air flow and the vacuum pressure value in a vacuum tube in real time when the vacuum pump works.
The technical scheme adopted by the utility model is as follows:
the vacuum flow tester comprises a tester body and a vacuum pressure gauge;
the shell of the tester body is in a cylindrical shape; one end of the tester body is provided with a vacuum interface, and the other end of the tester body is provided with an instrument interface; a pressure balance bin is formed in the hollow part of the shell of the tester body; a pressure stabilizing cylinder is fixedly connected in the pressure balancing bin; the pressure stabilizing cylinder is in a hollow cylindrical shape, and the inner cavity of the pressure stabilizing cylinder is a pressure stabilizing bin; one end of the pressure stabilizing cylinder is communicated with the instrument interface, and the other end of the pressure stabilizing cylinder is connected with a flow probe; the flow probe is hollow and long-strip-shaped, the inner cavity of the flow probe is communicated with the pressure stabilizing bin, and a detection hole is formed in one end of the flow probe, which is far away from the pressure stabilizing bin; the detection hole is communicated with the pressure balance bin and the pressure stabilizing bin; a pressure input port of the vacuum pressure gauge is communicated with the instrument interface;
the shell of the tester body is at least provided with a plurality of first airflow holes communicated with the pressure balance bin and the outside of the pressure balance bin; the plurality of first air flow holes are arranged at intervals; the shell of the tester body is also provided with a first voltage regulating ring which is movably sleeved on the tester body; the first pressure regulating ring can slide on the shell in a reciprocating mode along the arrangement direction of the first air flow holes, and therefore the first air flow holes are covered or opened one by one.
The principle of the utility model is as follows: the utility model provides a vacuum flow tester which is used for testing the flow rate of gas in a vacuum system under the condition of reaching target air pressure, judging the vacuum pumping capacity of a vacuum pump and judging whether the vacuum pump needs to be maintained or replaced. The specific test method comprises the following steps: connecting the vacuum interface of the tester body with a section of vacuum pipeline close to the vacuum pump, or directly connecting the vacuum interface of the tester body with the air exhaust vacuum port of the vacuum pump, and preferably sleeving an air leakage prevention rubber sleeve; closing a valve of a vacuum pipeline except the connection part between the tester body and the vacuum pump; starting a vacuum pump; adjusting the number of the first air flow holes covered by the first pressure regulating ring, and reading the numerical value of the vacuum pressure gauge; when the reading of the vacuum pressure gauge reaches the preset required pressure, the corresponding air flow numerical value in the vacuum system at the moment is obtained according to the number of the covered first air flow holes. If the measured gas flow numerical value is larger than or equal to the standard value (the standard value refers to the gas flow and the parameters of the vacuum pump and the corresponding vacuum pressure when the vacuum pump leaves the factory), the air extraction amount and the corresponding pressure value of the vacuum pump are normal, namely the working capacity of the vacuum pump is normal; if the actually measured air flow numerical value is smaller than the standard value, the working capacity of the vacuum pump is reduced, and whether the vacuum pump needs to be maintained or replaced is judged according to the difference between the actually measured numerical value and the standard value.
Furthermore, in order to adjust the air flow more finely so as to enable the measured vacuum pressure value and the measured air flow value to be more accurate, a plurality of second air flow holes communicated with the pressure balance bin and the outside of the pressure balance bin are further arranged on the shell of the tester body. The plurality of second airflow holes are arranged at intervals; the shell is also provided with a second voltage regulating ring movably sleeved on the body of the shell; the second pressure regulating ring can slide on the shell in a reciprocating mode along the arrangement direction of the second air flow holes, and therefore the second air flow holes are covered or opened one by one. Still further, the second airflow hole has a smaller aperture than the first airflow hole. The first airflow aperture is used to regulate high airflow and the second airflow aperture is used to fine-tune low airflow.
Preferably, in order to accurately read the value of the air flow, a reading identification block is further arranged on the housing, a first flow identification block is further arranged on the first pressure regulating ring, and air measurement marks are uniformly arranged on the first flow identification block; the second pressure regulating ring is also provided with a second flow identification block, and the second flow identification block is also uniformly provided with gas measurement identification; the reading identification block is fixed on the shell, and when the first pressure regulating ring slides on the shell in a reciprocating manner, the first flow identification block slides in a reciprocating manner relative to the reading identification block; when the second pressure regulating ring slides on the shell in a reciprocating mode, the second flow identification block slides in a reciprocating mode relative to the reading identification block. And after the adjustment is stopped, reading the numerical values of the gas measurement identifiers corresponding to the first flow identification block and the second flow identification block and the reading identification block respectively, and adding the numerical values to obtain the actual gas flow value.
Furthermore, in order to meet the vacuum pumps for testing different standard gas flow rates, the vacuum flow tester is also provided with a flow increasing connecting block. A connection section is formed on one side, close to the vacuum interface, of the shell; the flow-increasing connecting block is in a hollow cylindrical shape with two open ends, and a plurality of third airflow holes are further arranged on the surface of the flow-increasing connecting block; the inner diameter of the flow-increasing connecting block is matched with the outer diameter of the connecting section, and the flow-increasing connecting block can be sleeved on the connecting section to enable the plurality of third airflow holes to be communicated with the pressure balance bin.
The flow-increasing connection block is provided with a third airflow hole, and when the flow-increasing connection block is connected to the tester body, the airflow flux value is quantitatively increased for the testing capacity of the tester body. Furthermore, the outer diameter of one end of the flow-increasing connecting block is matched with the inner diameter of the other end of the flow-increasing connecting block, namely, a plurality of flow-increasing connecting blocks can be arranged, and every two flow-increasing connecting blocks can be sleeved to increase the flow volume value of air.
Preferably, in order to reinforce the structural stability of the pressure stabilizing cabin, the pressure stabilizing cabin is composed of a front pressure stabilizing cabin and a rear pressure stabilizing cabin which are communicated with each other; the position of the rear pressure stabilizing bin is staggered with the first airflow hole and the second airflow hole; one end of the front pressure stabilizing bin is connected with the flow probe, the other end of the front pressure stabilizing bin is communicated with the rear pressure stabilizing bin, and the other end of the rear pressure stabilizing bin is provided with the instrument interface.
The vacuum flow tester provided by the utility model has the advantages of simple structure, high measurement accuracy, convenience in manufacturing and carrying and the like, and is suitable for detection of various industrial equipment frequently using a vacuum system.
Drawings
FIG. 1 is a schematic perspective view of a vacuum flow meter according to an embodiment;
FIG. 2 is a schematic cross-sectional view of a vacuum flow meter according to an embodiment;
description of reference numerals:
1-tester body; 11-a housing; 111-a docking section; 12-a pressure equalization chamber; 13-vacuum interface; 14-a meter interface; 15-pressure stabilizing cylinder; 16-a voltage stabilizing bin; 161-front voltage stabilizing cabin; 162-rear voltage stabilization cabin; 17-a flow probe; 171-a detection hole; 2-vacuum pressure gauge; 21-a pressure input port; 30-a first airflow aperture; 31-a first voltage regulating ring; 311-first traffic identification block; 40-a second airflow aperture; 41-a second voltage regulating ring; 411-second traffic identification block; 5-reading identification block; 6-flow-increasing connection blocks; 61-third airflow aperture.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
Examples
As shown in fig. 1 and 2, a vacuum flow meter includes a meter body 1 and a vacuum pressure gauge 2.
The outer shell 11 of the tester body 1 is cylindrical; the tester body 1 is provided with a vacuum interface 13 at one end and an instrument interface 14 at the other end. The housing 11 of the tester body 1 is hollow inside to form a pressure balance chamber 12. The pressure balance chamber 12 is fixedly connected with a pressure stabilizing cylinder 15.
The pressure stabilizing cylinder 15 is also in the shape of a hollow column, and the inner cavity of the pressure stabilizing cylinder is a pressure stabilizing cabin 16. The surge tank 16 is composed of a front surge tank 161 and a rear surge tank 162 which are communicated with each other. One end of the front pressure stabilizing bin 161 is connected with a flow probe 17, the other end is communicated with the rear pressure stabilizing bin 162, and the other end of the rear pressure stabilizing bin 162 is provided with the instrument interface 14. The flow probe 17 is hollow and long-strip-shaped, the inner cavity of the flow probe is communicated with the pressure stabilizing bin 16, and a detection hole 171 is formed in one end of the flow probe, which is far away from the pressure stabilizing bin 16; the detection hole 171 communicates the pressure equalizing chamber 12 and the surge chamber 16. The pressure input port 21 of the vacuum pressure gauge 2 is connected to the meter interface 14.
The shell 11 of the tester body 1 is provided with a reading identification block 5. On the housing 11, two sides of the reading identification block 5 are respectively provided with a plurality of first airflow holes 30 and a plurality of second airflow holes 40 which are communicated with the pressure balance bin 12 and the outside thereof. A plurality of first airflow holes 30 are arranged at intervals along the circumferential direction of the housing 11; a plurality of second airflow holes 40 are also provided at intervals in the circumferential direction of the housing 11. On first airflow hole 30, be equipped with movably the cover and establish first pressure regulating ring 31 on shell 11, the length of first pressure regulating ring 31 is less than the periphery length of shell 11, and first pressure regulating ring 31 can be followed circumferential direction on shell 11 to cover or open a plurality of first airflow 30 hole one by one. On second air current hole 40, be equipped with movably the cover and establish second pressure regulating ring 41 on shell 11, the length of second pressure regulating ring 41 is less than the periphery length of shell 11, and second pressure regulating ring 41 can be followed circumferential direction and rotated on shell 11 to cover or open a plurality of second air current 40 hole one by one. Further, the second airflow hole 40 has a smaller aperture than the first airflow hole 30; the first airflow aperture 30 is used to regulate high airflow and the second airflow aperture 40 is used to fine tune low airflow.
The rear surge tank 162 of the present embodiment is positioned to be offset from the first and second airflow openings 30 and 40.
In this embodiment: the number of the first air flow holes 30 is 20 in total, each group of 2 is a group, and the 2 first air flow holes 30 in a group are arranged on the same straight line along the length direction of the housing 11; the airflow flux of each set of 2 first airflow holes 30 is 300L/min, i.e., the maximum airflow flux of 10 sets of first airflow holes 30 is 3000L/min. There are also a total of 20 second airflow holes 40, each group of 2 being a group, the 2 second airflow holes 40 in a group being arranged in a same straight line along the length of the housing 11; the airflow flux of each set of 2 second airflow holes 40 is 30L/min, i.e., the maximum airflow flux of 10 sets of second airflow holes 40 is 300L/min.
Further, the first pressure regulating ring 31 is further provided with a first flow rate identification block 311, and the first flow rate identification block 311 is uniformly provided with air measurement indicators (not shown). The second pressure regulating ring 41 is also provided with a second flow rate identification block 411, and the second flow rate identification block 411 is also uniformly provided with air measurement indicators (not shown). In this embodiment: the air measurement on the first flow mark block 311 is marked with 60L/min for each minimum scale, and 1 large scale is marked after every 5 small scales, and each large scale is 300L/min. The air amount on the second flow indicator block 411 is indicated at 30L/min per scale.
When the first pressure regulating ring 31 rotates on the housing 11 in a reciprocating manner, the first flow identification block 311 slides in a reciprocating manner relative to the reading identification block 5; when the second pressure regulating ring 41 rotates back and forth on the housing 11, the second flow rate identification block 411 slides back and forth relative to the reading identification block 5. After the adjustment is stopped, the values of the gas measurement indicators of the first flow indicator block 311 and the second flow indicator block 411 respectively corresponding to the reading indicator block 5 are read and added to obtain the actual gas flow value.
When the standard air flow of the vacuum pump is larger than the maximum air flow flux of the tester body, the maximum air flow flux of the tester body can be increased by connecting the flow-increasing connection block 6. A connection section 111 is formed on the housing 11 on a side close to the vacuum port 13. The flow-increasing connecting block 6 is a hollow cylinder with two open ends, and a plurality of third airflow holes 61 are arranged on the surface of the flow-increasing connecting block. The inner diameter of the flow-increasing connection block 6 is matched with the outer diameter of the connection section 111, and the flow-increasing connection block 6 can be sleeved on the connection section 111, so that the plurality of third airflow holes 61 are communicated with the pressure balance bin 12. Furthermore, the outer diameter of one end of the flow-increasing connecting block 6 is matched with the inner diameter of the other end of the flow-increasing connecting block, namely, a plurality of flow-increasing connecting blocks 6 can be arranged, and every two flow-increasing connecting blocks can be sleeved with each other to increase the flow volume value of air.
Claims (6)
1. Vacuum flow tester, its characterized in that: comprises a tester body and a vacuum pressure gauge;
the shell of the tester body is in a cylindrical shape; one end of the tester body is provided with a vacuum interface, and the other end of the tester body is provided with an instrument interface; a pressure balance bin is formed in the hollow part of the shell of the tester body; a pressure stabilizing cylinder is fixedly connected in the pressure balancing bin; the pressure stabilizing cylinder is in a hollow cylindrical shape, and the inner cavity of the pressure stabilizing cylinder is a pressure stabilizing bin; one end of the pressure stabilizing cylinder is communicated with the instrument interface, and the other end of the pressure stabilizing cylinder is connected with a flow probe; the flow probe is hollow and long-strip-shaped, the inner cavity of the flow probe is communicated with the pressure stabilizing bin, and a detection hole is formed in one end of the flow probe, which is far away from the pressure stabilizing bin; the detection hole is communicated with the pressure balance bin and the pressure stabilizing bin; a pressure input port of the vacuum pressure gauge is communicated with the instrument interface;
the shell of the tester body is at least provided with a plurality of first airflow holes communicated with the pressure balance bin and the outside of the pressure balance bin; the plurality of first air flow holes are arranged at intervals; the shell of the tester body is also provided with a first voltage regulating ring which is movably sleeved on the tester body; the first pressure regulating ring can slide on the shell in a reciprocating mode along the arrangement direction of the first air flow holes, and therefore the first air flow holes are covered or opened one by one.
2. The vacuum flow tester of claim 1, wherein: the shell of the tester body is also provided with a plurality of second airflow holes which are communicated with the pressure balance bin and the outside of the pressure balance bin; the plurality of second airflow holes are arranged at intervals; the shell is also provided with a second voltage regulating ring movably sleeved on the body of the shell; the second pressure regulating ring can slide on the shell in a reciprocating mode along the arrangement direction of the second air flow holes, and therefore the second air flow holes are covered or opened one by one.
3. The vacuum flow tester of claim 2, wherein: the second airflow hole has a smaller aperture than the first airflow hole.
4. The vacuum flow tester of claim 1, wherein: the shell is also provided with a reading identification block, and the first pressure regulating ring is also provided with a first flow identification block; the first flow identification block is uniformly provided with gas measurement identification; the reading identification block is fixed on the shell, and when the first pressure regulating ring slides on the shell in a reciprocating mode, the first flow identification block slides in a reciprocating mode relative to the reading identification block.
5. The vacuum flow tester of claim 2, wherein: the shell is also provided with a reading identification block, and the second pressure regulating ring is also provided with a second flow identification block; the second flow identification block is uniformly provided with gas measurement identification; the reading identification block is fixed on the shell, and when the second pressure regulating ring slides on the shell in a reciprocating mode, the second flow identification block slides in a reciprocating mode relative to the reading identification block.
6. The vacuum flow tester of claim 1, wherein: a flow-increasing connecting block is also arranged; a connection section is formed on one side, close to the vacuum interface, of the shell; the flow-increasing connecting block is in a hollow cylindrical shape with two open ends, and a plurality of third airflow holes are further arranged on the surface of the flow-increasing connecting block; the inner diameter of the flow-increasing connecting block is matched with the outer diameter of the connecting section, and the flow-increasing connecting block can be sleeved on the connecting section to enable the plurality of third airflow holes to be communicated with the pressure balance bin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122703393.0U CN216278408U (en) | 2021-11-08 | 2021-11-08 | Vacuum flow tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122703393.0U CN216278408U (en) | 2021-11-08 | 2021-11-08 | Vacuum flow tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216278408U true CN216278408U (en) | 2022-04-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122703393.0U Active CN216278408U (en) | 2021-11-08 | 2021-11-08 | Vacuum flow tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216278408U (en) |
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2021
- 2021-11-08 CN CN202122703393.0U patent/CN216278408U/en active Active
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