An objective lens fixing device

Abstract

This invention discloses an objective lens fixing device applied to a laser velocimeter for continuous rolling mills, relating to the field of laser velocimeter equipment for rolling mills. The laser velocimeter includes an objective lens, and the objective lens fixing device includes: a cover plate with a placement groove for placing the objective lens and an objective viewing hole communicating with the placement groove; a support plate with a receiving cavity and a flow hole communicating with the receiving groove, the flow hole being opposite to the objective viewing hole; and a support ring column surrounding the edge of the flow hole and placed in the receiving cavity. The support plate has an air inlet, and the support ring column has an air inlet groove and an air outlet groove positioned opposite to the air inlet. When the support plate and the cover plate are fixed, the support plate and the support ring column press the objective lens tightly into the placement groove of the cover plate. The objective lens fixing device provided by this invention can perform air blowing and cleaning of the objective lens, keeping the objective lens clean and improving the speed measurement accuracy and response speed of the laser velocimeter.

Description

Technical Field

[0001] This invention relates to the field of laser velocimeters for rolling mills, and more particularly to an objective lens fixing device. Background Technology

[0002] The cold rolling mill uses a five-stand CVC cold rolling mill to roll sheet metal for automobiles, home appliances, and other products. The speed of the strip is measured between the stands of the cold rolling mill using a laser velocimeter. The accuracy and efficiency of the strip speed measurement directly determine the precision of the mill's thickness control. Because the strip sheds iron filings and other debris during operation, which adhere to the objective lens of the laser velocimeter and affect its measurement accuracy and efficiency, ensuring the cleanliness of the objective lens surface is crucial. Summary of the Invention

[0003] The purpose of this invention is to provide an objective lens fixing device to solve the problem that the objective lens of a laser velocimeter used in a continuous rolling mill cannot be kept clean in the prior art.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] An objective lens fixing device is used in a laser velocimeter for a continuous rolling mill. The laser velocimeter includes an objective lens, comprising:

[0006] The cover plate is provided with a placement groove for placing the objective lens and has an objective viewing hole communicating with the placement groove;

[0007] The support plate is provided with a receiving cavity and has a flow hole communicating with the receiving groove. The flow hole is arranged opposite to the viewing hole.

[0008] A support ring column surrounds the edge of the flow hole and is placed in the receiving cavity. The support plate has an air inlet. The support ring column has an air inlet groove and an air outlet groove at a position opposite to the air inlet. When the support plate and the cover plate are fixed, the support plate and the support ring column press the objective lens tightly into the placement groove of the cover plate.

[0009] In an optional embodiment of this application, the angle between the air inlet and the objective lens is 20° to 40°.

[0010] In an optional embodiment of this application, the air outlet slot is close to the air inlet, and a first air guide slope is provided between the air outlet slot and the accommodating cavity, the angle between the first air guide slope and the accommodating cavity being 45° to 60°.

[0011] In an optional embodiment of this application, a second air guide slope is provided between the air inlet slot and the accommodating cavity, and the angle between the second air guide slope and the accommodating cavity is 30° to 45°.

[0012] In an optional embodiment of this application, the volume of the accommodating cavity gradually increases from the air inlet to the supporting ring column, and then gradually decreases from the supporting ring column to the direction away from the air outlet.

[0013] In an optional embodiment of this application, the air outlet groove of the bearing ring column has arc-shaped sides.

[0014] In an optional embodiment of this application, the height of the accommodating cavity is 8mm to 12mm.

[0015] In an optional embodiment of this application, the minimum distance between the two sides of the bearing ring and the accommodating cavity is 15mm.

[0016] In an optional embodiment of this application, the height of the air outlet sluice is higher than that of the air inlet sluice.

[0017] In an optional embodiment of this application, a placement opening for loading and unloading the objective lens is provided on one side of the placement slot.

[0018] The beneficial effects of the objective lens fixing device disclosed in this invention are as follows: The objective lens of a laser velocimeter is placed in a placement slot. An external air source is connected to the air inlet, and gas is blown into the accommodating cavity from the air inlet. After the gas enters the accommodating cavity, it blows towards the objective lens. Part of the gas is directly blown into the air outlet groove and then flows out of the accommodating cavity through the flow hole along the supporting ring column; the other part flows from the sides of the supporting ring column between the accommodating cavity and the air outlet groove, and then flows out of the accommodating cavity through the flow hole along the supporting ring column. The supporting ring column serves both to hold the objective lens in place and to separate the accommodating cavity, guiding the gas blown into the accommodating cavity so that the gas flows along the supporting ring column and covers the objective lens, keeping the objective lens clean. The laser from the laser velocimeter passes through the objective lens through the viewing aperture and then through the flow hole to be directed towards the strip steel, thereby accurately measuring the running speed of the strip steel and improving the accuracy of the laser velocimeter. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the objective lens fixing device of the present invention;

[0021] Figure 2 This is a cross-sectional view of an objective lens fixing device according to the present invention;

[0022] Figure 3 This is an exploded view of an objective lens fixing device according to the present invention;

[0023] Figure 4This is a schematic diagram of the structure of the cover plate of the objective lens fixing device of the present invention.

[0024] Reference numerals: 100, objective lens fixing device; 10, cover plate; 11, placement slot; 12, objective viewing hole; 13, placement opening; 20, support plate; 21, receiving cavity; 22, flow hole; 23, air inlet; 30, support ring column; 31, air outlet slot; 32, air inlet slot; 33, first air guide slope; 34, second air guide slope. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0027] The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature.

[0028] In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0029] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection," "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0030] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, they are provided so that the description of this disclosure will be more complete and fully convey the concept of the exemplary embodiments to those skilled in the art. The drawings are merely illustrative of this disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted.

[0031] The following is in conjunction with the appendix to this instruction manual. Figures 1-4 The preferred embodiments disclosed in this invention will be further described in detail below.

[0032] Please refer to Figure 1 and Figure 2 This application provides an objective lens fixing device 100, which can be applied to the speed measurement of strip steel using a laser velocimeter. The laser from the laser velocimeter passes through the objective lens via the viewing aperture 12 and then through the flow hole 22 before being directed at the strip steel. An external air source blows air into the receiving cavity 21 through the air inlet 23. The receiving cavity 21 is divided by a bearing ring column 30, allowing the gas entering the receiving cavity 21 to permeate the objective lens, keeping the objective lens clean and improving the speed measurement accuracy and response speed of the laser velocimeter.

[0033] Please refer to Figure 1 , Figure 3 and Figure 4 In this embodiment, an objective lens fixing device 100 is applied to a laser velocimeter in a continuous rolling mill. The laser velocimeter includes an objective lens, comprising:

[0034] The cover plate 10 is provided with a placement groove 11 for placing an objective lens and has an objective viewing hole 12 communicating with the placement groove 11.

[0035] The support plate 20 is provided with a receiving cavity 21 and a flow hole 22 communicating with the receiving groove. The flow hole 22 is arranged opposite to the viewing hole 12.

[0036] The supporting ring column 30 surrounds the edge of the flow hole 22 and is placed in the receiving cavity 21. The supporting plate 20 has an air inlet 23. The supporting ring column 30 has an air inlet groove 32 and an air outlet groove 31 at a position opposite to the air inlet 23. When the supporting plate 20 and the cover plate 10 are fixed, the supporting plate 20 and the supporting ring column 30 press the objective lens tightly into the placement groove 11 of the cover plate 10.

[0037] While the bearing ring 30 presses down on the objective lens, it also divides the accommodating cavity 21 to guide the gas blown into the accommodating cavity 21.

[0038] The angle between the air inlet 23 and the objective lens is 20° to 40°. After the gas blown through the air inlet 23 toward the objective lens, it can flow smoothly forward along the objective lens. The kinetic energy of the gas on the objective lens is reduced, thereby improving the purging effect of the gas on the objective lens.

[0039] Please refer to Figure 2 The air outlet slot 31 is close to the air inlet 23. A first guide slope 33 is provided between the air outlet slot 31 and the accommodating cavity 21. The angle between the first guide slope 33 and the accommodating cavity 21 is 45° to 60°. The first guide slope 33 guides the gas and directs the gas to the objective lens. The high angle helps to increase the flow rate of the gas passing through the first guide slope 33, improves the purging effect on the central area of ​​the objective lens, and also blocks the gas at the air outlet, causing the gas to flow to both sides.

[0040] A second guide slope 34 is provided between the air inlet slot 32 and the accommodating cavity 21. The angle between the second guide slope 34 and the accommodating cavity 21 is 30° to 45°. The second guide slope 34 guides the flow of gas. The inclination angle of the second guide slope 34 is lower than that of the first guide slope 33. The gas velocity is high and the pressure is low after passing through the first guide slope 33, which is conducive to the gas passing through the second guide slope 34 entering the flow hole 22 and flowing out.

[0041] The volume of the accommodating cavity 21 gradually increases from the air inlet 23 to the supporting ring column 30, and then gradually decreases from the supporting ring column 30 to the direction away from the air outlet. The volume of the accommodating cavity 21 first increases and then decreases, which is conducive to the gas flow and improves the gas purging quality of the objective lens.

[0042] The air outlet slot 31 of the supporting ring column 30 has rounded sides, which is conducive to the guidance of gas flow.

[0043] The height of the accommodating cavity 21 is 8mm to 12mm, which is conducive to the gas being blown into the accommodating cavity 21 from the air outlet and to the gas sweeping the objective lens.

[0044] The minimum distance between the two sides of the bearing ring and the accommodating cavity 21 is 15mm, which is conducive to the flow of gas.

[0045] The air outlet slot 31 is higher than the air inlet slot 32. The air outlet slot 31 is higher than the air inlet slot 32 relative to the accommodating cavity 21. This is beneficial for the air inlet slot 32 to divert the gas. Furthermore, the gas passing through the air inlet slot 32 has a high velocity and low pressure, which is beneficial for the gas passing through the air outlet slot 31 to enter the flow hole 22 and flow out.

[0046] Please refer to Figure 4 The placement slot 11 has a placement port 13 on one side for taking out and placing the objective lens, which makes it convenient to take out and place the objective lens in the placement slot 11 and to replace the objective lens.

[0047] In summary, the objective lens of the laser velocimeter is placed in the placement slot 11. An external air source is connected to the air inlet 23, which blows gas into the accommodating cavity 21. After entering the accommodating cavity 21, the gas is directed towards the objective lens. Part of the gas flows directly to the outlet slot 31 and then out of the accommodating cavity 21 along the supporting ring column 30 through the flow hole 22; the other part flows from both sides of the supporting ring column 30 between itself and the accommodating cavity 21 to the air inlet slot 32, and then out of the accommodating cavity 21 along the supporting ring column 30 through the flow hole 22. The supporting ring column 30 serves both to hold the objective lens in place and to separate the accommodating cavity 21, guiding the gas blown into the accommodating cavity 21 so that the gas flows along the supporting ring column 30 and covers the objective lens, keeping the objective lens clean. The laser from the laser velocimeter passes through the objective lens via the viewing aperture 12 and then through the flow hole 22 before being directed towards the strip steel, thereby accurately measuring the running speed of the strip steel and improving the accuracy of the laser velocimeter.

[0048] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0049] Although this disclosure has been described with reference to several typical embodiments, it should be understood that the terminology used is descriptive and exemplary, and not restrictive. Because this disclosure can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. An objective lens fixing device applied to a laser speedometer of a continuous rolling mill, the laser speedometer comprising an objective lens, characterized in that, include: The cover plate is provided with a placement groove for placing the objective lens and has an objective viewing hole communicating with the placement groove; The support plate is provided with a receiving cavity and has a flow hole communicating with the receiving cavity. The flow hole is arranged opposite to the viewing hole. A support ring column surrounds the edge of the flow hole and is placed in the receiving cavity. The support plate has an air inlet. The support ring column has an air inlet groove and an air outlet groove at a position opposite to the air inlet. When the support plate and the cover plate are fixed, the support plate and the support ring column press the objective lens tightly into the placement groove of the cover plate. The air outlet slot is close to the air inlet, and a first air guide slope is provided between the air outlet slot and the accommodating cavity. The angle between the first air guide slope and the accommodating cavity is 45°~60°. A second air guide slope is provided between the air inlet slot and the accommodating cavity, and the angle between the second air guide slope and the accommodating cavity is 30°~45°. The air outlet groove of the bearing ring column has rounded sides.

2. An objective lens fixing device according to claim 1, characterized in that The angle between the air inlet and the objective lens is 20°~40°.

3. The objective lens fixing device according to any one of claims 1-2, characterized in that, The height of the accommodating cavity is 8mm~12mm.

4. The objective lens fixing device according to claim 3, characterized in that, The minimum distance between the two sides of the bearing ring and the accommodating cavity is 15mm.

5. A lens fixing device according to any one of claims 1-2, characterized in that, The air outlet slot is higher than the air inlet slot.

6. A lens fixing device according to any one of claims 1-2, characterized in that, One side of the placement slot is provided with a placement opening for loading and unloading the objective lens.

Images