CN114252210A - Device applied to low-pressure sealing test of combined type high-speed air inlet and outlet valve - Google Patents
Device applied to low-pressure sealing test of combined type high-speed air inlet and outlet valve Download PDFInfo
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- CN114252210A CN114252210A CN202010995455.7A CN202010995455A CN114252210A CN 114252210 A CN114252210 A CN 114252210A CN 202010995455 A CN202010995455 A CN 202010995455A CN 114252210 A CN114252210 A CN 114252210A
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- air inlet
- speed air
- outlet valve
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2876—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for valves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/003—Machine valves
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- Examining Or Testing Airtightness (AREA)
Abstract
The invention belongs to a test device, and particularly relates to a device applied to a low-pressure sealing test of a combined type high-speed air inlet and outlet valve. A device applied to a low-pressure sealing test of a composite high-speed air inlet and outlet valve is characterized in that a square runner is arranged in front of the composite high-speed air inlet and outlet valve to be tested, a unidirectional runner is arranged behind the composite high-speed air inlet and outlet valve, and stop valves are arranged in front of and behind the composite high-speed air inlet and outlet valve. The invention has the following remarkable effects: the invention provides a device applied to a low-pressure sealing test of a composite high-speed air inlet and outlet valve, which has the advantages of simple structure, easy operation and low cost, and can easily obtain the pressure of 0.02MPa required by stable low-pressure sealing.
Description
Technical Field
The invention belongs to a test device, and particularly relates to a device applied to a low-pressure sealing test of a combined type high-speed air inlet and outlet valve.
Background
CJ/T217-2005 composite high-speed air inlet and outlet valve of water supply pipeline 6.12 requires: the low-pressure water seal of the composite high-speed air inlet and outlet valve is 0.02MPa, the pressure is maintained for 1min, and no visible leakage exists; the high-pressure water seal and the low-pressure water seal use the same device, and are all according to annex D in the standard: the hydraulic sealing test device has the following problems in specific use:
the pressure required for sealing the high-pressure water is very high, for example, a valve with 10KG pressure needs the high-pressure water sealing pressure of 11KG, namely 0.11 MPa; the low-pressure water sealing pressure is 0.02 MPa. According to the requirement of selecting a pressure gauge, the measuring range of the pressure gauge is 1.5-3 times of the testing pressure, and the maximum working pressure is not more than 2/3 of the measuring range when measuring stable pressure, a valve with 10KG pressure is used as the measuring range of a high-pressure water sealing pressure gauge, the pressure gauge with the measuring range of 0-0.4MPa is selected, and the pressure gauge with the measuring range of 0-0.06MPa is used as the measuring range of a low-pressure water sealing pressure gauge of 0.02MPa, so that the pressure gauge with the corresponding measuring range needs to be replaced according to the testing project in the testing process.
The pressure source used by the device is a booster pump, the required test pressure is obtained after pressure reduction through a pressure reducing valve, but when the low-pressure water seal of 0.02MPa is actually made, the situation of explosion of the meter can occur only by opening the pressure reducing valve, and even if the pressure increase is stopped, the stable pressure of 0.02MPa is difficult to obtain.
Disclosure of Invention
The invention aims at the defects of the prior art and provides a device applied to a low-pressure sealing test of a composite high-speed air inlet and outlet valve, which can easily obtain the pressure of 0.02MPa required by stable low-pressure sealing.
The invention is realized by the following steps: a device applied to a low-pressure sealing test of a composite high-speed air inlet and outlet valve is characterized in that a square runner is arranged in front of the composite high-speed air inlet and outlet valve to be tested, a unidirectional runner is arranged behind the composite high-speed air inlet and outlet valve, and stop valves are arranged in front of and behind the composite high-speed air inlet and outlet valve.
The device applied to the low-pressure sealing test of the combined type high-speed air inlet and outlet valve is characterized in that the square runner is divided into an upper path and a lower path, and the combined type high-speed air inlet and outlet valve is connected to a convergence point of the upper path and the lower path.
The device applied to the low-pressure sealing test of the combined type high-speed air inlet and outlet valve is characterized in that the upper path and the lower path are respectively provided with a stop valve.
The device applied to the low-pressure sealing test of the combined type high-speed air inlet and outlet valve is characterized in that the square runner is provided with a unique inlet.
The device applied to the low-pressure sealing test of the combined high-speed air inlet and exhaust valve is characterized in that the stop valve is arranged at the only inlet.
The device applied to the low-pressure sealing test of the composite high-speed air inlet and outlet valve is characterized in that a pressure reducing valve and a pressure gauge are arranged on the upper path.
The device applied to the low-pressure sealing test of the combined high-speed air inlet and outlet valve is characterized in that the pressure reducing valve and the pressure gauge are arranged between the inlet stop valve and the upper stop valve.
The device applied to the low-pressure sealing test of the combined type high-speed air inlet and exhaust valve is characterized in that the pressure reducing valve and the stop valve are both products with the grade of 10 KG.
The invention has the following remarkable effects: the invention provides a device applied to a low-pressure sealing test of a composite high-speed air inlet and outlet valve, which has the advantages of simple structure, easy operation and low cost, and can easily obtain the pressure of 0.02MPa required by stable low-pressure sealing.
Drawings
FIG. 1 is a schematic view of the apparatus of the present invention.
In the figure: 1. stop valve, 2, relief pressure valve, 3, manometer, 4, combined type high speed inlet and outlet valve, 5, stop valve, 6, stop valve, 7, stop valve.
Detailed Description
The invention is further illustrated by the following figures and examples.
The invention relates to a device applied to a low-pressure sealing test of a composite high-speed air inlet and outlet valve. As shown in figure 1, a connecting pipe, a pressure reducing valve and a stop valve with the pressure grade of 10KG are selected, and the calibers are all 15 mm; the inlet end is connected with a tap water pipeline, and tap water is used as a pressure source; the rapid water injection branch, the low-pressure obtaining branch and the drainage pressure relief branch form a test device; the rapid water injection branch consists of a stop valve 1, a stop valve 7 and a composite high-speed air inlet and outlet valve (a tested part) 4; the low-pressure obtaining branch consists of a stop valve 1, a pressure reducing valve 2, a pressure gauge 3, a stop valve 5 and a tested part 4; the water drainage and pressure relief branch consists of a tested part 4 and a stop valve 6.
The operation process comprises the following steps: three parts of rapid water injection, 0.02MPa low-pressure sealing test and water drainage and pressure relief; when water is injected rapidly, the pressure reducing valve 2, the stop valve 5 and the stop valve 6 are closed (the purpose of closing the pressure reducing valve 2 and the stop valve 5 is to protect the pressure gauge 3, the pressure of tap water is about 0.4MPa generally and exceeds the measuring range of the pressure gauge 3), and the stop valve 1 and the stop valve 7 are opened to achieve rapid water inlet; 0.02MPa low-pressure sealing test, when a floating ball of a tested piece 4 is positioned on a sealing surface, quickly injecting water, closing a stop valve 7 after the quick water injection is finished, opening a stop valve 5, slowly opening a pressure reducing valve 2, adjusting, observing the reading of a pressure gauge 3 until the reading is 0.02MPa and stable, holding the pressure for 1min, checking whether the sealing surface of the tested piece 4 has visible leakage or not, and if the observation result is that the test is passed or not, the test is passed; and (4) draining and decompressing, closing the stop valve 1, opening the stop valve 6 and realizing draining and decompressing.
Claims (8)
1. The utility model provides a be applied to experimental device of combined type high-speed inlet and outlet valve low pressure seal which characterized in that: a square runner is arranged in front of the tested combined high-speed air inlet and outlet valve (4), a unidirectional runner is arranged behind the combined high-speed air inlet and outlet valve (4), and stop valves are arranged at the front and the rear of the combined high-speed air inlet and outlet valve (4).
2. The device applied to the low-pressure sealing test of the composite high-speed air inlet and outlet valve according to claim 1, wherein: the square runner is divided into an upper path and a lower path, and the combined type high-speed air inlet and outlet valve (4) is connected to a convergence point of the upper path and the lower path.
3. The device applied to the low-pressure sealing test of the composite high-speed air inlet and outlet valve as claimed in claim 2, wherein: the upper and lower paths are respectively provided with a stop valve.
4. The device applied to the low-pressure sealing test of the composite high-speed air inlet and outlet valve according to claim 3, wherein: the square-shaped flow passage is provided with a unique inlet.
5. The device applied to the low-pressure sealing test of the composite high-speed air inlet and outlet valve as claimed in claim 4, wherein: a shut-off valve is provided at the only inlet.
6. The device applied to the low-pressure sealing test of the composite high-speed air inlet and outlet valve according to claim 5, wherein: the upper path is provided with a pressure reducing valve (2) and a pressure gauge (3).
7. The device applied to the low-pressure sealing test of the combined type high-speed air inlet and exhaust valve according to claim 6, wherein: the pressure reducing valve (2) and the pressure gauge (3) are arranged between the inlet stop valve and the upper stop valve.
8. The device applied to the low-pressure sealing test of the combined type high-speed air inlet and outlet valve as claimed in claim 7, wherein: the pressure reducing valve (2) and the stop valve are both products with the grade of 10 KG.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010995455.7A CN114252210A (en) | 2020-09-21 | 2020-09-21 | Device applied to low-pressure sealing test of combined type high-speed air inlet and outlet valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010995455.7A CN114252210A (en) | 2020-09-21 | 2020-09-21 | Device applied to low-pressure sealing test of combined type high-speed air inlet and outlet valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114252210A true CN114252210A (en) | 2022-03-29 |
Family
ID=80788301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010995455.7A Pending CN114252210A (en) | 2020-09-21 | 2020-09-21 | Device applied to low-pressure sealing test of combined type high-speed air inlet and outlet valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114252210A (en) |
-
2020
- 2020-09-21 CN CN202010995455.7A patent/CN114252210A/en active Pending
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