CN114354971A - Molten steel flow velocity measuring equipment for continuous casting crystallizer - Google Patents
Molten steel flow velocity measuring equipment for continuous casting crystallizer Download PDFInfo
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- CN114354971A CN114354971A CN202210043827.5A CN202210043827A CN114354971A CN 114354971 A CN114354971 A CN 114354971A CN 202210043827 A CN202210043827 A CN 202210043827A CN 114354971 A CN114354971 A CN 114354971A
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Abstract
The invention aims to provide a continuous casting crystallizer molten steel flow velocity measuring device which comprises a fixing device, wherein the fixing device comprises a mounting plate, a mounting rod, a sliding block and a sliding rod, the sliding block can slide or be fixed on the sliding rod, and the downward length of the mounting rod is further adjusted, so that the extending height of a speed measuring device into molten steel is adjusted, the molten steel can be conveniently measured in multiple points, and different measuring conditions can be adapted; the speed measuring device comprises a fixed rod, a cover body, a rotating wheel, an outer tube, an inner tube, an encoder, a lead and a display screen, and can record the rotating speed of the rotating wheel driven by the molten steel to rotate through the encoder and calculate the flow velocity of the molten steel; the rectifying device comprises a guide plate and a rectifying plate, can ensure that the flowing direction of the molten steel is consistent with the rotating direction of the rotating wheel used for measuring, rectifies the vortex flow at the rear of the flow velocity measuring equipment, reduces the influence on the measured molten steel flow velocity data, and ensures the measuring accuracy.
Description
Technical Field
The invention relates to the field of mechanical accessories, in particular to a device for measuring the molten steel flow velocity of a continuous casting crystallizer.
Background
During continuous casting, the flow behavior of the molten steel in the mold is directly related to the growth of the solidified shell, the surface quality of the cast strand and the formation of internal defects. That is, the flow of molten steel in a crystallizer has an important influence on the quality of a continuous casting billet, the traditional molten steel flow velocity measuring method is that a measuring rod is extended into the molten steel, the measuring rod is deflected by thrust generated by the flowing of the molten steel to further calculate the flow velocity of the molten steel, but when the measuring rod is extended into the molten steel, the flow direction of the molten steel is disturbed by the measuring rod, a vortex flow is easily formed behind the measuring rod, the flow velocity behind the measuring rod is slower relative to other directions, so that partial thrust of the molten steel in front of the measuring rod is counteracted, the measured flow velocity is small, and the traditional flow velocity measuring equipment needs the fluid movement direction to be consistent with the rotation direction of the measuring rod, but the flowing direction of the molten steel in the crystallizer cannot be accurately observed by naked eyes, and the flowing direction of the molten steel in the crystallizer is not completely unified and can be influenced by various factors, so that a certain included angle is formed between the flowing direction of the molten steel and the rotation direction of the measuring rod, further, the thrust on the measuring rod is smaller, and the measured flow velocity is also smaller.
A continuous measurement device and method of flow velocity near the surface of molten steel as proposed in cn201210487402.x, comprising a tachometer bar and a tachometer bar deflection means. One end of the speed measuring rod is a refractory material pipe, the other end of the speed measuring rod is a stainless steel rod, and the refractory material pipe is connected with the stainless steel rod in a close fit mode in size. The speed measuring rod is made of a refractory material of a single compound or a refractory material compounded by the compounds. The length of the speed measuring rod is 10-100 cm, and the diameter of the speed measuring rod is 5-50 mm. The speed measuring rod deflection device comprises a speed measuring rod fixing screw, and the speed measuring rod is installed on the speed measuring rod deflection device through the speed measuring rod fixing screw. The method mainly comprises the steps of calculating the distance between a rotation fulcrum and the center of gravity and the distance between the rotation fulcrum and an impact force point according to the center of gravity, the rotation fulcrum and the impact force point of a speed measuring rod, measuring the gravity value of the speed measuring rod, inserting the fireproof speed measuring rod into molten steel to obtain the rotation angle and the insertion depth, and calculating the continuous change of the flow rate of the molten steel.
The invention can adjust the angle of the flow rate measuring equipment according to the flowing direction of the molten steel, and more accurately measure the flow rate of the molten steel.
Disclosure of Invention
In order to solve the above problems, an object of the present invention is to provide a molten steel flow rate measuring apparatus for a continuous casting mold, which can adjust an angle of the molten steel flow rate measuring apparatus according to a flow direction of the molten steel to more accurately measure a flow rate of the molten steel.
The invention provides a continuous casting crystallizer molten steel flow velocity measuring device, which is characterized in that: the crystallizer comprises a fixing device, wherein the fixing device comprises an installation plate, an installation rod, a sliding block and a sliding rod, the installation plate is fixed on a crystallizer through a first screw, the sliding rod is fixed on the installation plate, the sliding block is slidably installed on the sliding rod, second screws are arranged on two sides of the sliding block, and the installation rod is fixed below the sliding block;
the speed measuring device comprises a fixed rod, a cover body, a rotating wheel, an outer tube, an inner tube, an encoder, a wire and a display screen, wherein the fixed rod is rotatably arranged below the mounting rod;
the rectifying device comprises a guide plate and rectifying plates, wherein the guide plate is fixed in front of the cover body, and the rectifying plates are fixed on two sides of the rear of the cover body.
Furthermore, an arc-shaped limiting groove corresponding to the outer pipe is arranged on the mounting plate.
Furthermore, the front opening of the cover body is large, and the rear opening is small.
Furthermore, a plurality of hemispherical shells are uniformly distributed around the rotating wheel.
Furthermore, the cover body is provided with a groove position corresponding to the rotating wheel, and a through hole is formed behind the groove position.
Furthermore, a vacuum cavity is arranged between the outer pipe and the inner pipe.
Furthermore, the conducting wire is arranged in the inner tube through the supporting frame and is positioned in the center of the inner tube.
Furthermore, the cross section of the guide plate is in a drop shape with a thick front side and a thin rear side.
Furthermore, the outer sides of the rectifying plates on the two sides are planes, and the inner sides of the rectifying plates are curved surfaces which are thick in the front and thin in the back.
Furthermore, the speed measuring device and the rectifying device are of symmetrical shapes, and a balancing weight is arranged on one side of the outer pipe.
Has the advantages that:
1. the mounting panel is fixed in on the crystallizer through first screw, the slide bar is fixed in on the mounting panel, the slider slidingtype is installed on the slide bar, both sides are equipped with the second screw, the installation pole is fixed in the slider below, can adjust the elasticity of second screw, make the slider can slide or fix on the slide bar, and then adjust the decurrent length of installation pole, thereby adjust the height that speed sensor stretched into the molten steel, be convenient for carry out the multiple spot measurement to the molten steel, with the measuring condition who adapts to the difference.
2. Dead lever rotary type is installed in installation pole below, the cover body is fixed in the dead lever below, the guide plate is fixed in cover body the place ahead, the guide plate cross-section is the thin water droplet shape of the thick rear side of front side, speed sensor and fairing are appearance symmetrical structure, and outer tube one side is equipped with the balancing weight, it is the same to make this flow velocity measuring equipment control atress, thereby make molten steel flow direction and guide plate direction keep dynamic balance, guarantee that molten steel flow direction is unanimous with the direction of rotation that is used for the measuring runner, guarantee measuring accuracy.
3. The cowling panel is fixed in cover body rear both sides, the cowling panel outside of both sides is the plane, thin curved surface in the thick back before the inboard, the molten steel that enables the both sides cowling panel outside can receive passing through of less influence, and the swirl in the middle of the cowling panel can form the low-pressure zone under the effect of the inboard curved surface of cowling panel, thereby flow through the cowling panel with higher speed, can not cause the accumulation of molten steel, come in and carry out the rectification to the swirl flow, reduce the influence to measured molten steel velocity of flow data, guarantee measuring accuracy.
4. The inner tube is arranged in the outer tube, the vacuum cavity is arranged between the outer tube and the inner tube, the encoder is fixed in the inner tube, the wire is arranged in the inner tube through the support frame and is positioned at the center of the inner tube, the direct contact with the wall of the inner tube is avoided, the wire and the encoder can be effectively insulated, the wire and the encoder can normally work in high-temperature molten steel, and the normal work of the flow velocity measuring equipment is ensured.
The implementation, functional features and advantages of the present invention will be further described with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is an exploded view of the fastening device of the present invention.
Fig. 3 is a schematic view of the overall structure of the velocity measuring device and the rectifying device of the present invention.
Fig. 4 is a cross-sectional view of the housing of the present invention.
FIG. 5 is a cross-sectional view of an outer tube and an inner tube of the present invention.
Fig. 6 is a cross-sectional view of a baffle of the present invention.
FIG. 7 is a cross-sectional view of a fairing of the present invention.
Reference numerals: a mounting plate 1; a first screw 2; a mounting rod 3; a slider 4; a second screw 5; a slide bar 6; a fixing rod 7; a cover body 8; a runner 9; an outer tube 10; an inner tube 11; a vacuum chamber 12; an encoder 13; a conductive line 14; a support frame 15; a counterweight 16; a display screen 17; a limiting groove 18; a baffle 19; a rectifying plate 20.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments, and in order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described below, which are, of course, merely examples and are not intended to limit the present invention.
Referring to the drawings, a continuous casting mold molten steel flow velocity measuring apparatus according to an embodiment of the present invention will be described, and as shown in fig. 1 to 7, the continuous casting mold molten steel flow velocity measuring apparatus includes a fixing device, the fixing device includes a mounting plate 1, a mounting rod 3, a sliding block 4, and a sliding rod 6, the mounting plate 1 is fixed to a mold by a first screw 2, the sliding rod 6 is fixed to the mounting plate 1, the sliding block 4 is slidably mounted to the sliding rod 6, second screws 5 are provided at both sides, and the mounting rod 3 is fixed below the sliding block 4.
In a specific embodiment: the elasticity of adjusting second screw 5 makes slider 4 can slide or fix on slide bar 6, and then adjusts the length that the installation pole 3 is decurrent to adjust the height that speed sensor stretched into the molten steel, be convenient for carry out the multiple spot measurement to the molten steel, with the measuring condition of adaptation difference.
As shown in fig. 3, 4 and 5, the apparatus for measuring the molten steel flow rate of a continuous casting crystallizer comprises a speed measuring device, the speed measuring device comprises a fixed rod 7, a cover body 8, a rotating wheel 9, an outer tube 10, an inner tube 11, an encoder 13, a conducting wire 14 and a display screen 17, the fixed rod 7 is rotatably mounted below a mounting rod 3, the cover body 8 is fixed below the fixed rod 7, the cover body 8 has a large front opening and a small rear opening, the rotating wheel 9 is mounted in the cover body 8, a plurality of hemispherical shells are uniformly distributed around the rotating wheel 9, the cover body 8 is provided with a groove position corresponding to the rotating wheel 9, a through hole is arranged behind the groove position to enable the molten steel entering the groove position to better flow out, the outer tube 10 is fixed above the cover body 8 and behind the fixed rod 7, an arc-shaped limiting groove 18 corresponding to the outer tube 10 is arranged on the mounting plate 1, the inner tube 11 is arranged in the outer tube 10, a vacuum cavity 12 is arranged between the outer tube 10 and the inner tube 11 to better insulate heat, the encoder 13 is fixed in the inner tube 11, and on the display screen 17 was fixed in the mounting panel 1, be equipped with corresponding data processing module in the display screen 17, the encoder 13 was connected with the display screen 17 through wire 14, and wire 14 was located the inner tube 11 through support frame 15 in, was located the inner tube 11 center, avoided the 11 pipe walls of direct contact inner tube, prevented that wire 14 from being overheated.
In a specific embodiment: the speed sensor passes through fixing device and stretches into in the molten steel, and the molten steel gets into from cover body 8 the place ahead, promotes runner 9 and rotates, and encoder 13 notes runner 9's rotation data, transmits for display screen 17 and carries out analysis calculation and show the result through wire 14, gets the data after preheating the certain time, is exactly the molten steel velocity of flow of this position.
As shown in fig. 6 and 7, the apparatus for measuring the flow rate of molten steel in a continuous casting mold comprises a rectifying device, the rectifying device comprises a guide plate 19 and a rectifying plate 20, the guide plate 19 is fixed in front of the cover body 8, the cross section of the guide plate 19 is in a drop shape with a thick front side and a thin rear side, the rectifying plate 20 is fixed on two sides of the rear of the cover body 8, the outer sides of the rectifying plates 20 on the two sides are planes, and the inner sides of the rectifying plates are curved surfaces with a thick front side and a thin rear side.
In a specific embodiment: when the speed measuring device stretches into the molten steel, the front end of the guide plate 19 faces the flowing direction of the molten steel, because the speed measuring device and the rectifying device are of a shape symmetrical structure, and a balancing weight 16 is arranged on one side of the outer pipe 10, the left and right stress of the flow speed measuring device is the same, the flowing direction of the molten steel and the direction of the guide plate 19 are kept in dynamic balance, if the flowing direction of the molten steel deviates from the direction of the guide plate 19, the pressure difference of the left fluid and the right fluid of the guide plate 19 is increased, the guide plate 19 and the speed measuring device are pushed to rotate by taking the fixed rod 7 as a central shaft, the flowing direction of the guide plate 19 and the flowing direction of the molten steel tend to be consistent, the flowing direction of the molten steel and the rotating direction of the rotating wheel 9 for measuring are consistent, and the measuring accuracy is ensured.
During the measurement, because stretching into of this velocity of flow survey equipment, can make the molten steel at rear form the turbulent flow swirl, then the eddy current flows through the cowling panel 20 of both sides, reach the effect according to the coanda, the molten steel in the both sides cowling panel 20 outside can receive passing through of less influence, and the eddy current in the middle of the cowling panel 20 can form the low-pressure area under the effect of the inboard curved surface of cowling panel 20, thereby flow through cowling panel 20 with higher speed, can not cause the accumulation of molten steel, come in and carry out the rectification to the eddy current, reduce the influence to measuring molten steel velocity of flow data.
The working principle is as follows: firstly, the tightness of the second screw 5 is adjusted, so that the sliding block 4 can slide or be fixed on the sliding rod 6, and further the downward length of the installation rod 3 is adjusted, thereby the height of the speed measuring device extending into the molten steel is adjusted, then the speed measuring device extends into the molten steel through the fixing device, the front end of the guide plate 19 faces the flowing direction of the molten steel, because the speed measuring device and the rectifying device are in a shape symmetrical structure, and one side of the outer tube 10 is provided with the balancing weight 16, the left and right stress of the flow speed measuring equipment is the same, so that the flowing direction of the molten steel and the direction of the guide plate 19 keep dynamic balance, because the flow speed measuring equipment extends, the rear molten steel forms turbulent vortex, then the turbulent vortex passes through the rectifying plates 20 at both sides, according to the coanda effect, the molten steel at the outer sides of the rectifying plates 20 at both sides can be passed through with smaller influence, and the vortex in the middle of the rectifying plates 20 can form a low-pressure area under the action of the inner curved surface of the rectifying plates 20, therefore, the molten steel flowing through the rectifying plate 20 is accelerated, the molten steel cannot be accumulated, then the molten steel passing through the guide plate 19 enters from the front of the cover body 8, the rotating wheel 9 is pushed to rotate, the encoder 13 records rotating data of the rotating wheel 9, the rotating data are transmitted to the display screen 17 through the lead 14, analysis calculation is carried out on the data, results are displayed, and the data after the molten steel is preheated for a certain time are taken, namely the molten steel flow speed at the position.
Claims (9)
1. The utility model provides a continuous casting crystallizer molten steel velocity of flow survey equipment which characterized in that: comprises that
The fixing device comprises a mounting plate, a mounting rod, a sliding block and a sliding rod, wherein the mounting plate is fixed on the crystallizer through a first screw, the sliding rod is fixed on the mounting plate, the sliding block is slidably mounted on the sliding rod, second screws are arranged on two sides of the sliding block, and the mounting rod is fixed below the sliding block;
the speed measuring device comprises a fixed rod, a cover body, a rotating wheel, an outer tube, an inner tube, an encoder, a wire and a display screen, wherein the fixed rod is rotatably arranged below the mounting rod;
the rectifying device comprises a guide plate and rectifying plates, wherein the guide plate is fixed in front of the cover body, the rectifying plates are fixed on two sides of the rear of the cover body, two sides of the rectifying plates are flat, and the inner side of each rectifying plate is thick in front and thin in back.
2. The apparatus of claim 1, wherein the mounting plate is provided with an arc-shaped stopper groove corresponding to the outer tube.
3. The apparatus for measuring the flow rate of molten steel in a continuous casting mold according to claim 1, wherein the cover has a large front opening and a small rear opening.
4. The apparatus for measuring the flow rate of molten steel in a continuous casting crystallizer of claim 1, wherein the runner has a plurality of hemispherical shells uniformly distributed around the runner.
5. The apparatus for measuring the flow rate of molten steel in a continuous casting mold according to claim 4, wherein the housing has a groove corresponding to the runner, and a through hole is formed at the rear of the groove.
6. The apparatus for measuring the flow rate of molten steel in a continuous casting mold according to claim 1, wherein a vacuum chamber is provided between the outer tube and the inner tube.
7. The apparatus for measuring the flow rate of molten steel in a continuous casting mold according to claim 1, wherein the wire is provided in the inner tube at the center of the inner tube by a support frame.
8. The apparatus for measuring the flow rate of molten steel in a continuous casting mold according to claim 1, wherein the cross-section of the baffle is in the form of a drop having a thick front side and a thin rear side.
9. The apparatus of claim 6, wherein the velocity measuring device and the rectifying device have a symmetrical shape, and a weight is disposed on one side of the outer tube.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210043827.5A CN114354971B (en) | 2022-01-14 | 2022-01-14 | Continuous casting crystallizer molten steel flow velocity measurement equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210043827.5A CN114354971B (en) | 2022-01-14 | 2022-01-14 | Continuous casting crystallizer molten steel flow velocity measurement equipment |
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| CN114354971B CN114354971B (en) | 2023-07-21 |
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2022
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