CN111659737A - Device and method for measuring uniformity of transverse water amount of laminar cooling - Google Patents
Device and method for measuring uniformity of transverse water amount of laminar cooling Download PDFInfo
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- CN111659737A CN111659737A CN202010392275.XA CN202010392275A CN111659737A CN 111659737 A CN111659737 A CN 111659737A CN 202010392275 A CN202010392275 A CN 202010392275A CN 111659737 A CN111659737 A CN 111659737A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
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Abstract
The invention discloses a device and a method for measuring the uniformity of transverse water quantity of laminar cooling, and belongs to the technical field of hot continuous rolling. The measuring device for the laminar cooling transverse water quantity uniformity comprises: the plurality of water collecting tanks are detachably connected with the laminar flow cooling header, each water collecting tank corresponds to the plurality of nozzles, and water inlets of the water collecting tanks are communicated with the corresponding nozzles; the water collecting grooves correspond to the water discharging pipelines one by one, and water outlets of the water collecting grooves are communicated with water inlets of the corresponding water discharging pipelines; the drainage pipelines are in one-to-one correspondence with the water receiving containers, and water outlets of the drainage pipelines are communicated with the corresponding water receiving containers. The device and the method for measuring the uniformity of the transverse water quantity of laminar cooling can obtain the uniformity of the transverse water quantity of laminar cooling.
Description
Technical Field
The invention relates to the technical field of hot continuous rolling, in particular to a device and a method for measuring transverse water quantity uniformity of laminar cooling.
Background
In the cooling process after the hot rolled strip steel is rolled, the accurate control of the cooling uniformity in the length direction, namely the final cooling temperature is a main process for determining the microstructure and the mechanical property of the strip steel, and the cooling uniformity in the width direction is an important factor influencing the strip shape quality of the strip steel. In order to improve the plate shape quality of the hot-rolled plate strip steel, the improvement of the cooling uniformity of the strip steel in the width direction becomes a key point.
Post-rolling cooling is usually achieved by laminar flow cooling, with tens of U-shaped nozzles being uniformly arranged in each header across the width of the rolling line. In order to improve the cooling uniformity in the laminar cooling width direction, it is necessary to ensure that several tens of nozzles per manifold in the width direction of the rolling line are uniform in flow rate. However, nozzles in different areas are affected by header levelness, corrosion, plugging, etc. and require periodic maintenance or measurement to meet process requirements.
However, in the prior art, there is no method for obtaining cooling uniformity in the width direction of laminar cooling.
Disclosure of Invention
The invention provides a measuring device and a measuring method for laminar cooling transverse water quantity uniformity, which solve or partially solve the technical problem that the cooling uniformity in the width direction of laminar cooling is not obtained in the prior art.
In order to solve the above technical problem, the present invention provides a device for measuring the uniformity of the cross flow water amount of laminar cooling, which is arranged below an upper nozzle of a laminar cooling header, and comprises: a plurality of water collecting grooves, a plurality of water discharging pipelines and a plurality of water collecting containers; the plurality of water collecting tanks are detachably connected with the laminar flow cooling header, each water collecting tank corresponds to the plurality of nozzles, and water inlets of the water collecting tanks are communicated with the corresponding nozzles; the water collecting grooves correspond to the water discharging pipelines one by one, and water outlets of the water collecting grooves are communicated with water inlets of the corresponding water discharging pipelines; the drainage pipelines are in one-to-one correspondence with the water receiving containers, and water outlets of the drainage pipelines are communicated with the corresponding water receiving containers.
Furthermore, a hook is fixedly arranged on the water collecting tank.
Further, the pipe diameter sectional area of the drainage pipeline is larger than the sum of the sectional areas of the corresponding nozzles.
Further, the drain line includes: hard and soft pipes; the water inlet of the hard pipe is communicated with the water outlet of the water collecting tank; the water inlet of the hose is communicated with the water outlet pipe of the hard pipe, and the water outlet of the hose is communicated with the water receiving container.
Further, the length of the hard tube is 50-100mm, and the length of the soft tube is 1000-3000 mm.
Further, the length of the water collecting tank is the sum of the distances between 3 and 8 nozzles; the width of the water collecting tank is 100-250 mm; the depth of the water collecting groove is 150-300 mm.
Based on the same inventive concept, the application also provides a measuring method for the transverse water quantity uniformity of laminar cooling, which comprises the following steps: arranging a plurality of water collecting grooves on a laminar flow cooling header, enabling each water collecting groove to be communicated with a plurality of corresponding nozzles, and collecting cooling water in different areas through the water collecting grooves; opening the laminar flow cooling manifold and waiting for flow stabilization; the cooling water collected by the water collecting tank is conveyed into the water receiving container through a drainage pipeline; weighing the weight of the water receiving container after collecting the cooling water to obtain the weight of the cooling water in different areas; and comparing the weights of the cooling water in different areas to measure the uniformity of the water quantity in the width direction of the laminar cooling header pipe, and obtaining the uniformity of the transverse water quantity of laminar cooling.
Further, the acquiring the weight of the cooling water in different areas comprises: weighing the water receiving container before the water receiving container collects the cooling water to obtain the initial weight of the water receiving container; and weighing the weight of the water receiving container after the cooling water is collected, and subtracting the initial weight of the water receiving container to obtain the weight of the cooling water in different areas.
Further, the water receiving container receives cooling water for 10-20 seconds.
Further, a plurality of the water collection troughs are arranged in front of the laminar flow cooling header, and the laminar flow cooling header is closed.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
because the plurality of water collecting tanks are detachably connected with the laminar flow cooling collecting pipe, each water collecting tank corresponds to the plurality of nozzles, and the water inlets of the water collecting tanks are communicated with the plurality of corresponding nozzles, each water collecting tank can collect cooling water sprayed by the plurality of nozzles in the corresponding area, because the plurality of water collecting tanks correspond to the plurality of water drainage pipelines one by one, the water outlets of the water collecting tanks are communicated with the water inlets of the corresponding water drainage pipelines, the plurality of water drainage pipelines correspond to the plurality of water receiving containers one by one, and the water outlets of the water drainage pipelines are communicated with the corresponding water receiving containers, the laminar flow cooling collecting pipe is opened, the flow is stable, the cooling water collected by the water collecting tanks is conveyed into the water receiving containers through the water drainage pipelines, the weight of the water receiving containers after the cooling water is collected is weighed, the weight of the cooling water in different areas is obtained, and the uniformity of the water quantity in the width direction of, the uniformity of the transverse water amount of laminar cooling can be ensured.
Drawings
FIG. 1 is a schematic structural diagram of a measurement apparatus for measuring the uniformity of transverse water amount in laminar cooling according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a method for measuring the uniformity of the transverse water amount of laminar cooling according to an embodiment of the present invention;
FIG. 3 is a manifold width direction water distribution plot of the method of measuring cross water uniformity for laminar cooling of FIG. 2.
Detailed Description
Referring to fig. 1, a device for measuring the uniformity of laminar cooling transverse water amount provided by an embodiment of the present invention is disposed below an upper nozzle of a laminar cooling header, and the device for measuring the uniformity of laminar cooling transverse water amount includes: a plurality of water collecting tanks 1, a plurality of water discharging pipelines 2 and a plurality of water collecting containers.
The water collecting tanks 1 are detachably connected with the laminar flow cooling collecting pipe, each water collecting tank 1 corresponds to a plurality of nozzles, and the water inlets of the water collecting tanks 1 are communicated with the corresponding nozzles.
The water collecting grooves 1 correspond to the water discharging pipelines 2 one by one, and water outlets of the water collecting grooves 1 are communicated with water inlets of the corresponding water discharging pipelines 2.
The plurality of drainage pipelines 2 correspond to the plurality of water receiving containers one by one, and the water outlets of the drainage pipelines are communicated with the corresponding water receiving containers.
In the embodiment of the application, because the plurality of water collecting tanks 1 are detachably connected with the laminar flow cooling header, each water collecting tank 1 corresponds to a plurality of nozzles, the water inlet of the water collecting tank 1 is communicated with a plurality of corresponding nozzles, therefore, each water collecting tank 1 can collect cooling water sprayed by a plurality of nozzles in corresponding areas, because the plurality of water collecting tanks 1 correspond to the plurality of water drainage pipelines 2 one by one, the water outlet of the water collecting tank 1 is communicated with the water inlet of the corresponding water drainage pipeline 2, the plurality of water drainage pipelines 2 correspond to the plurality of water receiving containers one by one, and the water outlet of the water drainage pipeline is communicated with the corresponding water receiving containers, the laminar flow cooling header is opened, the flow is waited for stabilization, the cooling water collected by the water collecting tanks 1 is conveyed into the water receiving containers through the water drainage pipelines 2, the weight of the water receiving containers after the cooling water is collected is weighed, and, the uniformity of the water quantity in the width direction of the laminar cooling header is measured by comparing the weights of the cooling water in different areas, and the uniformity of the transverse water quantity of laminar cooling can be ensured to be obtained.
Wherein, the water receiving container can adopt a bucket, and has low cost and easy acquisition.
Specifically, a hook 3 is fixedly arranged on the water collecting tank 1. In this embodiment, the water collecting tank 1 can be fixed by welding to form the hook 3, so as to ensure the connection firmness.
The water collecting tank 1 can be hung on the laminar flow cooling collecting pipe through the hook 3, and is convenient to disassemble and assemble.
Specifically, the pipe diameter sectional area of the drainage pipeline 2 is larger than the sum of the sectional areas of the corresponding nozzles, so that water supply and drainage balance is guaranteed, cooling water is prevented from overflowing from the water collecting tank 1, and the accuracy of obtaining the uniformity of the transverse water amount of laminar cooling is guaranteed.
The drain line 2 includes: a hard pipe 2-1 and a soft pipe 2-2.
The water inlet of the hard pipe 2-1 is communicated with the water outlet of the water collecting tank 1, and the hard pipe 2-1 is adopted to be conveniently communicated with the water collecting tank 1.
The water inlet of the hose 2-2 is communicated with the water outlet pipe of the hard pipe 2-1, the water outlet of the hose 2-2 is communicated with the water receiving container, and the hose 2-2 is adopted, so that cooling water is conveniently conveyed.
The cooling water collected by the water collecting tank 1 is sequentially conveyed into the water collecting container through the hard pipe 2-1 and the hose 2-2.
Specifically, the length of the hard tube 2-1 is 50-100mm, and the length of the soft tube 2-2 is 1000-3000 mm.
Specifically, the length of the water collecting tank 1 is the sum of the distances between 3-8 nozzles, the width of the water collecting tank 1 is 250mm, and the depth of the water collecting tank 1 is 300mm, so that the cooling water in different areas can be received.
Referring to fig. 2, the present application further provides a method for measuring the uniformity of the cross flow water amount of laminar cooling, comprising the following steps:
a plurality of water collecting grooves 1 are arranged on the laminar flow cooling header, each water collecting groove 1 is communicated with a plurality of corresponding nozzles, and cooling water in different areas is collected through the water collecting grooves 1.
And opening the laminar flow cooling manifold and waiting for the flow to stabilize.
The cooling water collected by the water collecting tank 1 is conveyed into a water collecting container through a drainage pipeline 2.
And weighing the weight of the water collecting container after collecting the cooling water to obtain the weight of the cooling water in different areas.
And comparing the weights of the cooling water in different areas to measure the uniformity of the water quantity in the width direction of the laminar cooling header so as to obtain the uniformity of the transverse water quantity of laminar cooling.
Specifically, acquiring the weight of the cooling water in different areas comprises the following steps:
and weighing the water receiving container before the water receiving container collects the cooling water to obtain the initial weight of the water receiving container.
And weighing the weight of the water collecting container after collecting the cooling water, and subtracting the initial weight of the water collecting container to obtain the weight of the cooling water in different areas, thereby ensuring the accuracy of obtaining the weight of the cooling water.
Specifically, the water receiving container receives cooling water for 10-20 seconds, and the weight of the collected cooling water is guaranteed to meet weighing requirements.
Specifically, the plurality of water collecting tanks 1 are arranged in front of the laminar flow cooling header, and the laminar flow cooling header is closed, so that the condition that a nozzle of the laminar flow cooling header continuously sprays cooling water to influence a detection result is avoided.
In order to more clearly describe the embodiments of the present invention, the following description is made in terms of the method of using the embodiments of the present invention.
And measuring the water quantity difference between the transmission side and the operation side of a certain laminar flow header.
The laminar flow cooling header is shut off and is in a non-spraying state.
Taking two water collecting tanks 1, wherein one water collecting tank 1 is fixed below the 6 th to 10 th nozzles on the transmission side of the laminar flow header, and the other water collecting tank 1 is fixed below the 6 th to 10 th nozzles on the operation side of the laminar flow header, so that the two water collecting tanks 1 are symmetrically distributed by taking the width center line of the rolling line as the center.
And opening the laminar flow cooling upper header, and waiting for more than 20s to stabilize the flow.
Weighing two buckets respectively, wherein the original weights are Wos0，Wds0。
Using the original weight as Wos0The bucket collects water discharged from the hard pipe 2-1 and the soft pipe 2-2 of the water discharge pipeline 2 of the operation side water collection tank 1 for 15s by using the original weight Wds0The water bucket collects the hardness of the water collecting tank 1 at the transmission sideThe water drained from tube 2-1 and hose 2-2 lasts 15 s.
The weight of the two buckets after collecting water is measured and is respectively Wos1，Wds1。
Calculating the weight of water collected on the transmission side and the operation side, wherein the weight of water on the operation side Fos＝Wos1-Wos0Driving the side water weight Fds＝Wds1-Wds0Obtaining the difference D ═ F between the water volumes of the two sidesos-FdsAnd obtaining the uniformity of the transverse water quantity of laminar cooling.
Method two
And measuring the water distribution of the transmission side, the middle part and the operation side of a laminar flow header.
The length of the water collecting tank 1 is 5 nozzle intervals, namely water of 5 nozzles can be collected, the width is 150mm, the depth is 200mm, the diameter of the drainage pipeline is 8mm, the length of the hard pipe is 2-1 mm, and the length of the hose is 4000 mm.
The laminar flow cooling header is shut off and is in a non-spraying state.
Taking three water collecting tanks 1, wherein one water collecting tank 1 is fixed below the 6 th to 10 th nozzles on the transmission side of the laminar flow header, one water collecting tank 1 is fixed at the central position in the width direction of the laminar flow header, and the other water collecting tank 1 is fixed below the 6 th to 10 th nozzles on the operation side of the laminar flow header.
And opening the laminar flow cooling upper header, and waiting for more than 20s to stabilize the flow.
Weighing three buckets respectively, wherein the original weights are Wos0，Wc0，Wds0。
Using the original weight as Wos0The bucket collects water discharged from the hard pipe 2-1 and the soft pipe 2-2 of the operation side water collecting tank 1 for 15s, and uses the original weight Wc0The bucket collects water discharged from the hard pipe 2-1 and the soft pipe 2-2 of the water collecting tank 1 arranged at the widthwise central position of the collecting pipe for 15s by using the original weight Wds0The bucket collects water drained from the hard pipe 2-1 and the hose 2-2 of the water collecting tank 1 at the transmission side for 15 s.
The weight of the three buckets after collecting water is measured and is Wos1，Wc1，Wds1。
Calculating the weight of water collected on the transmission side and the operation side, wherein the weight of water on the operation side Fos＝Wos1-Wos0Water weight F at widthwise central position of headerc＝Wc1-Wc0Driving the side water weight Fds＝Wds1-Wds0. Through the water quantities at the three positions, referring to fig. 3, a water quantity distribution diagram in the width direction of the collecting pipe can be simply drawn, and the uniformity of the transverse water quantity of laminar cooling is obtained.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (10)
1. A device for measuring laminar cooling cross water flow uniformity, disposed below an upper nozzle of a laminar cooling header, comprising: a plurality of water collecting grooves, a plurality of water discharging pipelines and a plurality of water collecting containers;
the plurality of water collecting tanks are detachably connected with the laminar flow cooling header, each water collecting tank corresponds to the plurality of nozzles, and water inlets of the water collecting tanks are communicated with the corresponding nozzles;
the water collecting grooves correspond to the water discharging pipelines one by one, and water outlets of the water collecting grooves are communicated with water inlets of the corresponding water discharging pipelines;
the drainage pipelines are in one-to-one correspondence with the water receiving containers, and water outlets of the drainage pipelines are communicated with the corresponding water receiving containers.
2. The apparatus for measuring laminar flow cooling transverse water flow uniformity of claim 1, wherein:
the water collecting tank is fixedly provided with a hook.
3. The apparatus for measuring laminar flow cooling transverse water flow uniformity of claim 1, wherein:
the pipe diameter sectional area of the drainage pipeline is larger than the sum of the sectional areas of the corresponding nozzles.
4. The apparatus of claim 1, wherein the drain line comprises: hard and soft pipes;
the water inlet of the hard pipe is communicated with the water outlet of the water collecting tank; the water inlet of the hose is communicated with the water outlet pipe of the hard pipe, and the water outlet of the hose is communicated with the water receiving container.
5. The apparatus for measuring laminar flow cooling transverse water flow uniformity of claim 1, wherein:
the length of the hard tube is 50-100mm, and the length of the soft tube is 1000-3000 mm.
6. The apparatus for measuring laminar flow cooling transverse water flow uniformity of claim 1, wherein:
the length of the water collecting tank is the sum of the distances between 3 to 8 nozzles; the width of the water collecting tank is 100-250 mm; the depth of the water collecting groove is 150-300 mm.
7. A measuring method of laminar cooling transverse water quantity uniformity is based on the measuring device of laminar cooling transverse water quantity uniformity of any one of claims 1 to 6, and is characterized in that the measuring method of laminar cooling transverse water quantity uniformity comprises the following steps:
arranging a plurality of water collecting grooves on a laminar flow cooling header, enabling each water collecting groove to be communicated with a plurality of corresponding nozzles, and collecting cooling water in different areas through the water collecting grooves;
opening the laminar flow cooling manifold and waiting for flow stabilization;
the cooling water collected by the water collecting tank is conveyed into the water receiving container through a drainage pipeline;
weighing the weight of the water receiving container after collecting the cooling water to obtain the weight of the cooling water in different areas;
and comparing the weights of the cooling water in different areas to measure the uniformity of the water quantity in the width direction of the laminar cooling header pipe, and obtaining the uniformity of the transverse water quantity of laminar cooling.
8. The method for measuring the uniformity of the laminar cooling transverse water flow according to claim 7, wherein the obtaining the weights of the cooling water in different areas comprises:
weighing the water receiving container before the water receiving container collects the cooling water to obtain the initial weight of the water receiving container;
and weighing the weight of the water receiving container after the cooling water is collected, and subtracting the initial weight of the water receiving container to obtain the weight of the cooling water in different areas.
9. The method for measuring laminar cooling transverse water flow uniformity of claim 7, wherein:
the water receiving container receives cooling water for 10-20 seconds.
10. The method for measuring laminar cooling transverse water flow uniformity of claim 7, wherein:
placing a plurality of said water collection troughs in front of said laminar flow cooling header, closing said laminar flow cooling header.
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| CN202010392275.XA CN111659737A (en) | 2020-05-11 | 2020-05-11 | Device and method for measuring uniformity of transverse water amount of laminar cooling |
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| CN202010392275.XA CN111659737A (en) | 2020-05-11 | 2020-05-11 | Device and method for measuring uniformity of transverse water amount of laminar cooling |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113092058A (en) * | 2021-06-09 | 2021-07-09 | 中国空气动力研究与发展中心低速空气动力研究所 | Water feeding distribution measuring device and measuring method for wind tunnel test |
| CN113477728A (en) * | 2021-06-17 | 2021-10-08 | 首钢集团有限公司 | Measuring device, and system and method for detecting nozzle flow of laminar flow cooling header |
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Application publication date: 20200915 |