CN110823538A - High-pressure descaling nozzle simulation test device and test method thereof - Google Patents
High-pressure descaling nozzle simulation test device and test method thereof Download PDFInfo
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- CN110823538A CN110823538A CN201910999361.4A CN201910999361A CN110823538A CN 110823538 A CN110823538 A CN 110823538A CN 201910999361 A CN201910999361 A CN 201910999361A CN 110823538 A CN110823538 A CN 110823538A
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Abstract
The invention discloses a high-pressure descaling nozzle simulation test device which comprises a water tank (1), wherein the water tank (1) is connected with a pressurized water supply system (2), the pressurized water supply system (2) is connected with a switch valve group (3), the switch valve group (3) comprises a group of switch valves (3 a) which are connected in parallel, each switch valve (3 a) is connected with a flow meter (3 b) and a pressure meter (3 c) in series, the switch valve group (3) is connected with a collecting pipe (4), and the collecting pipe (4) is connected with a collecting pipe moving device (5); the collector (4) is provided with a group of screw ports (6) for mounting the descaling nozzles (8), each screw port (6) is connected with a sealing nut (7) matched with the screw port, a test board (9) is arranged below the collector (4), and the test board (9) is fixed in a test fixture (10). The invention has the advantages of simple structure, cheap material consumption, low cost and easy operation, improves the test efficiency and leads the test result to be more comprehensive.
Description
Technical Field
The invention relates to the technical field of performance detection of a high-pressure water descaling nozzle in rolling, in particular to a high-pressure descaling nozzle simulation test device and a test method thereof.
Background
With the rapid development of the steel industry, the demand of high-surface steel plates for downstream steel manufacturing industry is increasing. For the steel plate manufacturing process, the quality of the descaling effect is directly related to the quality of the surface quality of the final steel plate product. Therefore, the use of a descaling nozzle with excellent performance is critical to the surface quality of the steel sheet.
At present, the online plate beating test method is mostly adopted for testing the performance of the descaling nozzle, and the device for testing the descaling effect of high-pressure water is provided in patent CN201220209931.9, and can be used for testing the descaling effect on site, but the test result cannot comprehensively reflect the actual performance of the nozzle. Patent CN201120117746.2 discloses a descaling nozzle performance testing device, but the device can only test a single nozzle and only reflect the hitting force condition. Patent cn201520688001.x discloses a high-pressure water nozzle striking force distribution detection device, which can detect a plurality of nozzles, but is limited to the measurement of striking force and cannot fully reflect the nozzle performance. In addition, most of the existing nozzle testing methods of the impact force sensors are adopted, but the nozzle testing methods need continuous bow-shaped or zigzag-shaped movement, are complex in testing process, long in time consumption, low in working efficiency, incapable of meeting the requirements of field batch nozzle testing, expensive in sensor price, easy to damage and high in testing cost.
Disclosure of Invention
The invention aims to solve the problems of single function, low efficiency and high cost of the existing descaling nozzle testing device, and provides a high-pressure descaling nozzle simulation testing device which can not only simultaneously test a plurality of nozzles to improve the working efficiency, but also reflect the performances of the nozzles in all aspects, does not need a hitting force sensor and reduces the testing cost.
In order to achieve the purpose, the invention adopts the following technical scheme:
a high-pressure descaling nozzle simulation test device comprises a water tank, wherein the water tank is connected with a pressurized water supply system, the pressurized water supply system is connected with a switch valve group through a pipeline, the switch valve group comprises a group of switch valves connected in parallel, each switch valve is connected with a flow meter and a pressure meter in series, the switch valve group is connected with a collecting pipe through a pipeline, and the collecting pipe is connected with a collecting pipe moving device to control the movement of the collecting pipe;
the collector is provided with a group of screw ports for mounting the descaling nozzles, each screw port is connected with a sealing nut matched with the screw port, and a test board is arranged below the collector and fixed in the test fixture.
Furthermore, the collector moving device is a moving guide rail with a servo motor, and can accurately control the collector to move up and down, so that the working distance from the nozzle to the test steel plate is adjusted.
Further, the screw ports on the collecting pipes are obliquely arranged, and the inclination angle is 15 degrees.
Further, the test panels were pure aluminum or teflon panels that were not heat treated.
Furthermore, the device is arranged in a closed box body, and the box body is provided with an observation window and a baffle capable of being opened and closed so as to realize real-time observation of the test process and ensure the safety of personnel in the test process.
The pressurizing water supply system is in the prior art and mainly comprises a variable frequency motor, a low-pressure pump, a high-pressure pump, a pressure sensor, a flow sensor, an overflow valve and the like, wherein the variable frequency motor drives the low-pressure pump and the high-pressure pump, water in a water tank sequentially passes through the low-pressure pump and the high-pressure pump so as to output a high-pressure water source, one end of the overflow valve is connected with an output pipeline of the high-pressure pump, and the other end of the overflow valve is connected with the water tank. After the pressurization is performed by the part, a stable water flow with a set pressure can be obtained.
The sensor and the switch valve group in the testing device are connected with a computer, and the automatic control of the whole testing process is realized through data acquisition and software control.
In order to further achieve the aim of the invention, the invention also provides a high-pressure descaling nozzle simulation test method, which comprises the following steps of firstly injecting enough industrial water into a water tank, and is characterized in that the method comprises the following specific operation steps:
(1) adjusting all parameters of the collecting pipe to be consistent with the actual application parameters of the rolling mill;
(2) installing a descaling nozzle to be tested on a screw port of a collecting pipe, adjusting the inclination angle of the descaling nozzle, and sealing the unused screw port of the collecting pipe by using a nut;
(3) mounting the test board on a test fixture, and placing the assembled test fixture below the descaling nozzle;
(4) the collector moving device drives the collector to move up and down, and the working distance from the descaling nozzle to the test board is set;
(5) setting parameters such as descaling pressure, flow and the like, and starting pressurization through a pressurization water supply system;
(6) setting proper strike test time according to test requirements;
(7) after the water pressure is stable, opening the switch valve group, spraying high-pressure water onto the test board through the descaling nozzles through the collecting pipe, and starting to perform a descaling nozzle striking test;
(8) after the striking is finished, closing the switch valve group, and taking out the test board to obtain a group of required erosion nicks;
(9) 3D modeling reconstruction is carried out on the erosion nick by adopting a confocal microscope or a 3D contour scanner, so as to obtain detailed data of the internal dimension of the whole erosion nick;
(10) analyzing the notch size data obtained by scanning to obtain data such as the erosion area, the effective erosion interval, the average erosion depth, the erosion uniformity and the like of the descaling nozzle;
(11) and analyzing the data and comparing the data with standard striking nick data to obtain the actual use performance of the descaling nozzle, thereby completing the performance test work of the whole descaling nozzle.
Wherein, the erosion area is the plane erosion area of the whole nick; the effective erosion interval is an erosion nick interval under effective striking pressure; the average erosion depth is the average value of the depth of the nicks in the effective erosion interval; the erosion uniformity is the length ratio of the depth within the effective erosion interval within the range of the average depth + -10 mm.
Further, when a plurality of nozzles are tested, by analyzing score data of the overlapping positions of two adjacent scores separately, the proper deflection angle of the nozzle installation can be determined.
According to the technical scheme, the use of a hitting force sensor is omitted, the structure is simple, the material consumption is low, and the manufacturing and testing cost is low; the testing method is easy to operate, the time consumed in the whole testing process is less than 10min, the testing efficiency is greatly improved compared with that of the traditional impact force, and the testing requirement of mass nozzles on site can be met; through three-dimensional data analysis of erosion nicks, detailed performance parameters of the descaling nozzle in the whole hitting range can be comprehensively reflected, and the problem that the traditional hitting force test result is one-sided is solved; the actual effect of nozzle striking in a turbulent interference area can be reflected through the test of a plurality of groups of nozzles; the system and the method are utilized to carry out performance test on the descaling nozzle, and can provide guidance for determining the service life of the descaling nozzle, selecting the type and the manufacturer of the nozzle, measuring the installation parameters of the nozzle, making the descaling process and the like.
Drawings
FIG. 1 is a schematic view of a high-pressure descaling nozzle simulation test apparatus according to the present invention.
Detailed Description
Example 1
In order to make the present invention more clear, a high pressure descaling nozzle simulation test apparatus and a test method thereof according to the present invention will be further described with reference to the accompanying drawings, and the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.
As shown in fig. 1, a high-pressure descaling nozzle simulation test device comprises a water tank 1, wherein the water tank 1 is connected with a pressurized water supply system 2, the pressurized water supply system 2 is connected with a switch valve group 3 through a pipeline, the switch valve group 3 comprises a group of switch valves 3a connected in parallel, each switch valve 3a is connected with a flow meter 3b and a pressure meter 3c in series, the switch valve group 3 is connected with a manifold 4 through a pipeline, and the manifold 4 is connected with a manifold moving device 5 for controlling the movement of the manifold;
the manifold 4 is provided with a group of screw ports 6 for installing the descaling nozzles, each screw port 6 is connected with one descaling nozzle 8, a test board 9 is arranged below the manifold 6, and the test board 9 is fixed in a test fixture 10.
During testing, all parts of the testing device are installed in place, and the normal operation of the equipment is ensured through trial operation. The tank 1 is filled with industrial water. The testing device is provided with a header 4 with the same parameters as the header in practical application of the rolling mill, the header 4 is provided with five groups of nozzle mounting screw sockets 6, and the inclination angle is 15 degrees. Two unused descaling nozzles 8 are mounted on two adjacent screws 6 of the header 4, and the remaining three unused screws 6 are sealed with dedicated seal nuts 7. The spray angle of the descaling nozzles 8 is 26 degrees, and the deflection angles of the two descaling nozzles 8 are adjusted to 15 degrees.
As test plate 9, a pure aluminum plate which has not been heat-treated was used. The test aluminum plate was mounted on the test fixture 10 and the assembled test fixture 10 was placed under the descaling nozzle 8. The manifold moving device 5 was adjusted so that the descaling nozzles 8 were adjusted to 102.5mm in distance from the test plate 9. The descaling pressure is set to be 22.8MPa, the flow rate is set to be 115.3L/min and other parameters, and the pressurization is started through the pressurized water supply system 2. The striking time was set to 1 min. And after the equipment displays that the water pressure is stable, opening the switch valve group 3 and starting to carry out a descaling nozzle striking test. After 1min of striking, the on-off valve 3a is closed, the test board 9 is taken out, and two erosion nicks are obtained.
And 3D modeling reconstruction is carried out on the erosion nick by adopting a confocal microscope, so that detailed data of the size of the inside of the whole erosion nick is obtained. The data of the notch size obtained by scanning are analyzed, and the erosion area of the descaling nozzle is 10.18mm2Erosion length of 64.8mm, effective erosion interval of 60.2mm, average erosion depth of 1.19mm, erosion uniformity of 82.99%, etc. The erosion overlapping amount of the two nozzles is 3.3mm, and the overlapping position is positioned in an effective scouring interval.
Through the data analysis and the comparison with the standard nozzle data, the nozzle has excellent performance, proper overlapping amount of adjacent nozzles and reasonable design of the collecting pipe. Can meet the descaling requirement of the rolling mill.
Example 2
This example was a performance test of a fine descaling nozzle that had been used for a rolling mill in a certain hot rolling mill for 6 months. It is mainly tested whether the descaling nozzle has reached its life cycle.
Firstly, all parts of the testing device are installed in place, and the normal operation of the equipment is ensured through trial operation. The tank 1 is filled with industrial water. The testing device is provided with a tested header 4 with the same parameters as the actual header of the rolling mill, the header 4 is provided with screw ports 6 for installing five groups of nozzles, and the inclination angle is 15 degrees. One descaling nozzle 8 which has been used for 6 months is mounted on a screw adjacent to the header 4, and the remaining four unused screws are sealed by special sealing nuts 7. The descaling nozzle 8 has a spray angle of 26 °. The angle of deflection of the descaling nozzle 8 was adjusted to 15 °.
A polytetrafluoroethylene resin plate is used as a test board 9, the test board 9 is mounted on a test fixture 10, and the assembled test fixture 10 is placed below a descaling nozzle 8. The manifold moving device 5 was adjusted so that the descaling nozzles 8 were adjusted to 102.5mm in distance from the test plate 9. The descaling pressure is set to be 22.8MPa, the flow rate is set to be 115.3L/min and other parameters, and the pressurization is started through the pressurized water supply system 2. The striking time was set to 1 min. And after the equipment displays that the water pressure is stable, opening the switch valve group 3 and starting to carry out a descaling nozzle striking test. After 1min of striking, the valve of the switch valve 3a is closed, and the test board 9 is taken out to obtain an erosion nick.
And 3D modeling reconstruction is carried out on the erosion nick by adopting a 3D profile scanner, so as to obtain detailed data of the size of the inside of the whole erosion nick. The data of the notch size obtained by scanning are analyzed, and the erosion area of the descaling nozzle is 4.16mm2The erosion length is 43.8mm, the effective erosion interval is 38.2mm, the average erosion depth is 0.69mm, and the erosion uniformity is 30.41%.
Through the analysis of the data and the comparison with the data of the new nozzle, the nozzle is determined to be seriously worn after being used for 6 months, reaches the service life limit, cannot meet the descaling requirement and needs to be replaced immediately.
In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention.
Claims (6)
1. The utility model provides a high pressure descaling nozzle simulation test device, includes water tank (1), its characterized in that:
the water tank (1) is connected with a pressurized water supply system (2), the pressurized water supply system (2) is connected with a switch valve group (3), the switch valve group (3) comprises a group of switch valves (3 a) which are connected in parallel, each switch valve (3 a) is connected with a flow meter (3 b) and a pressure meter (3 c) in series, the switch valve group (3) is connected with a collecting pipe (4), and the collecting pipe (4) is connected with a collecting pipe moving device (5);
the collector (4) is provided with a group of screw ports (6) for mounting the descaling nozzles (8), each screw port (6) is connected with a sealing nut (7) matched with the screw port, a test board (9) is arranged below the collector (4), and the test board (9) is fixed in a test fixture (10).
2. The high pressure descaling nozzle simulation test apparatus of claim 1, wherein:
the collector moving device (5) is a moving guide rail with a servo motor.
3. The high-pressure descaling nozzle simulation test device according to claim 1 or 2, wherein:
the test plate (9) is a pure aluminum plate or a polytetrafluoroethylene plate which has not been heat-treated.
4. The high-pressure descaling nozzle simulation test device according to claim 1 or 2, wherein:
the screw (6) on the header (4) is obliquely arranged, and the inclination angle is 15 degrees.
5. The high-pressure descaling nozzle simulation test device according to claim 1 or 2, wherein:
the testing device is arranged in a closed box body (11), and an observation window (12) and a baffle (13) which can be opened and closed are arranged on the box body (11).
6. A high-pressure descaling nozzle simulation test method comprises the steps of firstly injecting enough industrial water into a water tank, and is characterized by comprising the following specific operation steps:
the method comprises the following steps: adjusting all parameters of the header (4) to be consistent with the actual application parameters of the rolling mill;
step two: installing the descaling nozzle (8) to be tested on the screw (6) of the header (4), adjusting the inclination angle of the descaling nozzle (8), and sealing the unused screw (6) by using a sealing nut (7);
step three: mounting the test board (9) on a test fixture (10), and placing the assembled test fixture (10) below the descaling nozzle (8);
step four: the collecting pipe moving device (5) drives the collecting pipe (4) to move up and down, and the working distance from the descaling nozzles (8) to the test board (9) is set;
step five: parameters such as descaling pressure, flow and the like are set, and pressurization is started through a pressurization water supply system (2);
step six: setting proper strike test time according to test requirements;
step seven: after the water pressure is stable, the switch valve group (3) is opened, high-pressure water is sprayed onto the test board (9) through the descaling nozzles (8) through the header (4), and the descaling nozzle striking test is started;
step eight: after the striking is finished, closing the switch valve group (3), taking out the test board (9) and obtaining a group of required erosion nicks;
step nine: 3D modeling reconstruction is carried out on the erosion nick by adopting a confocal microscope or a 3D contour scanner, so as to obtain detailed data of the internal dimension of the whole erosion nick;
step ten: analyzing the notch size data obtained by scanning to obtain data such as the erosion area, the effective erosion interval, the average erosion depth, the erosion uniformity and the like of the descaling nozzle;
step eleven: and analyzing the data and comparing the data with standard striking nick data to obtain the actual use performance of the descaling nozzle, thereby completing the performance test work of the whole descaling nozzle.
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| CN202599652U (en) * | 2012-05-14 | 2012-12-12 | 武汉钢铁(集团)公司 | High pressure water spray testing device |
| CN204903156U (en) * | 2015-09-06 | 2015-12-23 | 河北钢铁股份有限公司 | Jet nozzle hitting power distribution detection device |
| KR20170072718A (en) * | 2015-12-17 | 2017-06-27 | 주식회사 포스코 | Apparatus for testing performance of descaling nozzle |
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2019
- 2019-10-21 CN CN201910999361.4A patent/CN110823538A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101221095A (en) * | 2008-01-23 | 2008-07-16 | 广州珠江钢铁有限责任公司 | On-line detecting device and method for scale removing nozzle in roller mill descaling system |
| CN201532318U (en) * | 2009-09-28 | 2010-07-21 | 上海梅山钢铁股份有限公司 | Calibrating apparatus for headers and spraying nozzles of hot-rolling descaler |
| CN202057480U (en) * | 2011-04-20 | 2011-11-30 | 北京科技大学 | High pressure water descaling nozzle performance testing device |
| CN202599652U (en) * | 2012-05-14 | 2012-12-12 | 武汉钢铁(集团)公司 | High pressure water spray testing device |
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Application publication date: 20200221 |