A laser distance measuring device for measuring the pusher distance of a rolling mill
By using a laser displacement sensor and water-cooling components in a laser ranging device, the problem of low measurement accuracy in traditional methods is solved, achieving high-precision and simple pusher distance measurement, which is suitable for laser ranging of rolling mill pushers.
Patent Information
- Application Number
- CN202521181319.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-10
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-06-10
AI Technical Summary
Traditional methods for measuring the movement distance of rolling mill pushers suffer from low measurement accuracy, complex operation, and high manpower consumption.
A laser ranging device is adopted, including a laser displacement sensor, an optical rectifier, and a water-cooling component. The laser displacement sensor emits and receives laser beams, the optical rectifier adjusts the direction of the laser beam, and the water-cooling component cools the laser displacement sensor by injecting cooling water into unconnected cavities, ensuring that the laser displacement sensor can work normally in high-temperature environments.
It improves measurement accuracy, is easy to operate, and can obtain accurate measurement results in a short time, reducing manpower consumption.
Smart Images
Figure CN224682397U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of industrial measurement and automation control technology, and relates to a laser ranging device for measuring the distance of a rolling mill pusher. Background Technology
[0002] In industrial production, the pusher is an essential component of the rolling mill. During operation, the pusher moves the steel billet from side to side. Two pushers work together to clamp the steel billet from both sides and send it into the designated rolling hole of the rolling mill. Therefore, measuring the distance the pusher moves is an important step.
[0003] The traditional measurement method involves two operators working together to stretch a ruler 10 to 30 meters to measure the actual distance the pusher moves. This method suffers from problems such as low measurement accuracy, complex operation, and high manpower and time consumption.
[0004] Therefore, it is particularly important to design a laser ranging device that can achieve high precision and is easy to operate. Utility Model Content
[0005] To at least address the problem of low measurement accuracy in the traditional method of measuring the distance of a rolling mill pusher using a ruler, as described above, this utility model provides the following technical solution: a laser ranging device for measuring the distance of a rolling mill pusher, the laser ranging device comprising:
[0006] A laser displacement sensor, which is used to emit and receive laser beams;
[0007] A beam straightening assembly, located in front of the laser sensor, guides and constrains the propagation direction of the laser beam from the laser displacement sensor, and adjusts the laser beam from a divergent beam into a parallel beam, ensuring that the laser beam reaches the target pusher.
[0008] A water-cooling assembly, wherein the water-cooling assembly is provided with a first accommodating cavity and a second accommodating cavity that are not interconnected in a direction from the inside to the outside, the first accommodating cavity is used to accommodate the laser displacement sensor and at least part of the optical rectifier assembly, and the second accommodating cavity is filled with cooling water for cooling the contents of the first accommodating cavity.
[0009] The outer side of the cavity wall of the first receiving cavity is provided with several annular recesses along the length direction.
[0010] Optionally, in the laser ranging device for measuring the distance of a rolling mill pusher described above, the laser displacement sensor includes: a housing, a laser emitter, and a laser receiver;
[0011] The outer wall of the outer casing is in contact with the inner wall of the water-cooling assembly;
[0012] The laser emitter and the laser receiver are an integrated structure located inside the housing;
[0013] Both the laser beam emitted by the laser emitter and the laser beam reflected by the measurement target propagate along the axis of the optical assembly.
[0014] Optionally, in the laser ranging device for measuring the distance of a rolling mill pusher described above, the laser displacement sensor further includes: a timer, a processor, and a built-in battery disposed within the housing;
[0015] The timer is used to record the round-trip time of the laser beam;
[0016] The processor is connected to the timer and is used to calculate the distance the pusher moves;
[0017] The built-in battery is connected to the timer, the laser emitter, the laser receiver, and the processor, respectively.
[0018] Optionally, in the laser ranging device for measuring the distance of a rolling mill pusher described above, the optical assembly includes: a laser transmission tube and a lens tube;
[0019] The inner cavity of the lens barrel has an I-shaped cross section, and a lens is installed at the front end of the lens barrel;
[0020] The front end of the laser transmission tube is located at the rear end of the inner cavity of the lens. The laser transmission tube is composed of a cylindrical part and a tapered part. The inner wall of the cylindrical part is provided with a threaded structure along the length direction for connecting with the laser displacement sensor. The tapered part is located on the front side of the cylindrical part. The inner cavity of the tapered part gradually decreases in the direction from back to front.
[0021] Optionally, in the laser ranging device for measuring the distance of a rolling mill pusher described above, the water-cooling assembly includes: an inner cylinder, an outer cylinder, and a cover plate;
[0022] The inner cavity of the inner cylinder is the first receiving cavity, and the inner cylinder has a plurality of annular recesses on its outer side wall along the length direction;
[0023] The outer cylinder is sleeved around the inner cylinder in the circumferential direction. The sealed end of the outer cylinder is sealed to the open end of the inner cylinder. A water injection connector is provided on the outer cylinder, and the water injection connector is connected to a water source through a cooling water circuit.
[0024] The cover plate is installed over the open end of the outer cylinder, and the cover plate has a water outlet hole;
[0025] The gap between the outer cylinder and the inner cylinder communicates with the gap between the cover plate and the sealing end of the inner cylinder to form a second receiving cavity for circulating the cooling water.
[0026] Optionally, in the laser ranging device for measuring the distance of a rolling mill pusher described above, the water-cooling assembly includes: an inner tube, an outer cylinder, and a cover plate;
[0027] The inner cavity of the inner tube is the first receiving cavity, and the inner tube has a plurality of annular recesses on its outer side wall along its length.
[0028] The outer cylinder is sleeved around the inner tube, and the sealed end of the outer cylinder is sealed to the front end of the inner cylinder. The outer cylinder is provided with a water injection connector, which is connected to a water source through a cooling water circuit.
[0029] The cover plate is installed over the open end of the outer cylinder, and the cover plate has a water outlet hole;
[0030] The laser displacement sensor is sealed to the inner tube;
[0031] The gap between the outer cylinder and the inner tube communicates with the gap between the cover plate and the rear end of the housing of the laser displacement sensor to form a second receiving cavity for circulating the cooling water.
[0032] Optionally, in the laser ranging device for measuring the distance of a rolling mill pusher described above, a plug is provided in the through hole of the cover plate to prevent the cooling water from leaking; and
[0033] The outer cylinder has an annular groove in the middle for connecting the bracket and for the operator to hold the outer cylinder.
[0034] Optionally, in the laser rangefinder device for measuring the distance of a rolling mill pusher described above, the water-cooling component is made of a corrosion-resistant material.
[0035] Optionally, in the aforementioned laser rangefinder for measuring the distance to a rolling mill pusher, the lens barrel is made of a light-transmitting material; and
[0036] The lens is provided with a dust-proof coating to reduce dust adhesion to the lens.
[0037] Optionally, in the laser ranging device for measuring the distance of a rolling mill pusher described above, the optical assembly and the housing are connected by a sensor mounting base for fixing the integrated structure.
[0038] The beneficial effects of the technical solution provided by this utility model embodiment are:
[0039] This application utilizes a laser displacement sensor to emit and receive laser beams. A beam straightening assembly guides and constrains the propagation direction of the laser beam from the sensor, adjusting it from a divergent beam to a parallel beam, ensuring precise aiming at the target pusher. A water-cooling assembly is configured with two non-interconnected cavities, a first and a second, arranged from the inside out. Cooling water is injected into the second cavity of the water-cooling assembly. The cooling water flows through several annular recesses along the length of the outer wall of the first cavity, providing more uniform cooling to the laser displacement sensor located in the first cavity. This ensures the laser displacement sensor can operate normally for extended periods in high-temperature, high-pressure industrial environments. This application solves the problem of low measurement accuracy in traditional methods of measuring pusher movement using a ruler, achieving higher measurement accuracy, obtaining results in a short time, saving time and effort, and offering convenient operation. Attached Figure Description
[0040] Figure 1 A schematic front view cross-sectional view of a laser rangefinder device for measuring the distance of a rolling mill pusher, provided as an embodiment of this utility model;
[0041] Figure 2 A schematic cross-sectional view of a laser rangefinder for measuring the distance to a rolling mill pusher, provided as an embodiment of this utility model;
[0042] In the diagram: 1. Laser displacement sensor; 11. Housing; 2. Optical assembly; 21. Laser transmission tube; 22. Lens tube; 3. Water cooling assembly; 31. Inner cylinder; 32. Outer cylinder; 33. Cover plate; 34. Water injection connector; 4. Sensor mounting base. Detailed Implementation
[0043] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.
[0044] In the description of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and do not require that this utility model be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. The terms "connected," "linked," and "set up" used in this utility model should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a direct connection or an indirect connection through intermediate components; a wired connection, a radio connection, or a wireless communication signal connection. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.
[0045] Please see Figure 1-2 The present invention provides the following technical solution: a laser ranging device for measuring the distance of a rolling mill pusher.
[0046] The laser ranging device includes: a laser displacement sensor 1, a light-refining assembly 2, and a water-cooling assembly 3. The laser displacement sensor 1 is used to emit and receive laser beams. This embodiment does not limit the specific structure of the laser displacement sensor 1; it can be any existing technology. The light-refining assembly 2 is located in front of the laser sensor (in...). Figure 1 In the shown image, the direction in which the pusher extends to the right is called the forward direction, and vice versa (the reverse direction is called the backward direction). The laser beam straightening component 2 is used to guide and constrain the propagation direction of the laser beam from the laser displacement sensor 1, and adjust the laser beam from a divergent laser beam to a parallel laser beam, so that the laser beam reaches the target pusher (i.e., the measurement target). The water-cooling component 3 is provided with a first and a second non-communicating accommodating cavity in a direction from the inside out. The first accommodating cavity is used to accommodate the laser displacement sensor 1 and at least part of the laser beam straightening component 2, and the second accommodating cavity is filled with cooling water for cooling the contents of the first accommodating cavity (referring to the laser displacement sensor 1 and at least part of the laser beam straightening component 2). This embodiment does not limit the specific structure of the water-cooling component 3, as long as the two accommodating cavities do not affect each other. Preferably, the outer side of the cavity wall of the first accommodating cavity has several annular recesses along the length direction. Compared with the traditional method of measuring the distance moved by the pusher using a ruler, this device uses laser ranging, which has higher measurement accuracy, can obtain measurement results in a very short time, saves time and effort, and is easy to operate. Furthermore, by injecting cooling water into the second receiving cavity of the water-cooling assembly 3, the cooling water flows within these annular recesses, which can more evenly cool the laser displacement sensor 1, ensuring that the laser displacement sensor 1 can work normally in a high-temperature and high-pressure industrial environment for a long time.
[0047] Before use, the two rolling mill pushers work together to clamp the billet from both sides and align it with the designated rolling hole of the rolling mill. When the billet enters the rolling hole, the two pushers stop moving.
[0048] In use, align the laser displacement sensor 1 with the target pusher bed, activate the laser displacement sensor 1 to emit a laser beam. When the laser beam passes through the optical rectifier 2, the optical rectifier 2 guides and constrains the propagation direction of the laser beam, and performs optical processing such as focusing and collimation on the laser beam, adjusting the laser beam from a divergent laser beam into a parallel laser beam, so that the laser beam is accurately directed towards the measurement target. After the laser beam reaches the target pusher bed, it is reflected back and received by the laser displacement sensor 1. The laser displacement sensor 1 calculates the distance the pusher bed moves based on the round-trip time of the laser beam. Then, turn off the laser displacement sensor 1 and record the measurement results.
[0049] As an embodiment of the specific structure of the laser displacement sensor 1 described above, in this embodiment, the laser displacement sensor 1 includes: a housing 11, a laser emitter (not shown in the figure), and a laser receiver (not shown in the figure). The outer wall of the housing 11 is in contact with the inner wall of the water-cooling assembly 3, so that the water-cooling assembly 3 can cool the laser displacement sensor 1 through radiation. The laser emitter and laser receiver are an integrated structure, mounted on the inner side of the housing 11 using a bracket. Preferably, the optical assembly 2 and the housing 11 are connected by a sensor mounting base 4 for fixing the integrated structure. The laser beam emitted by the laser emitter and the laser beam reflected by the target pusher both propagate along the axis of the optical assembly 2, that is, the emission and reception of the laser beam occur on the same optical path, thereby improving ranging accuracy and reliability.
[0050] Furthermore, the laser displacement sensor 1 also includes: a timer (not shown in the figure), a processor (not shown in the figure), and a built-in battery (not shown in the figure), all housed within the housing 11. The timer records the round-trip time of the laser beam. The processor is connected to the timer and calculates the distance the pusher moves based on the timer's recorded data. The built-in battery is connected to the timer, laser emitter, laser receiver, and processor, respectively, and supplies power to these electrical devices.
[0051] As an embodiment of the specific structure of the aforementioned optical rectifier 2, in this embodiment, the optical rectifier 2 includes a laser transmission tube 21 and a lens barrel 22. The inner cavity of the lens barrel 22 has an I-shaped axial section, and a lens (not shown in the figure) is mounted at the front end of the lens barrel 22. The lens is used for optical processing such as focusing and collimation of the laser beam to improve the quality of the laser beam and the ranging accuracy. By collimating the diverging laser beam emitted by the laser emitter into a parallel laser beam, the lens enables it to be directed more accurately towards the target pusher, and can focus the laser beam reflected back from the target pusher onto the laser receiver, improving the strength and quality of the received signal. The front end of the laser transmission tube 21 is located at the rear end of the inner cavity of the lens. The laser transmission tube 21 is composed of a cylindrical part and a tapered part. The inner wall of the cylindrical part has a threaded structure along its length for connecting with the laser displacement sensor 1. Through the threaded structure, the laser displacement sensor 1 is securely assembled, ensuring the stability and positional accuracy of the laser transmission tube 21 in the device, while also facilitating disassembly and maintenance. The tapered section is located on the front side of the cylindrical section. In the direction from back to front, the inner cavity of the tapered section gradually decreases. In this way, the tapered section can focus the diverging laser beam into a parallel laser beam, so that it propagates along or close to the axis (also known as the optical axis) of the lens tube 22.
[0052] As an embodiment of the specific structure of the aforementioned water-cooling component 3, in this embodiment, the water-cooling component 3 includes: an inner cylinder 31, an outer cylinder 32, and a cover plate 33. The inner cavity of the inner cylinder 31 is a first receiving cavity, and several annular recesses are formed on the outer side wall of the inner cylinder 31 along its length, serving as flow channels for cooling water. The outer cylinder 32 is fitted around the circumferential outer side of the inner cylinder 31, and its sealed end is sealed to the open end of the inner cylinder 31. A water injection connector 34, made of a metal material (such as copper), is provided on the outer cylinder 32, and the water injection connector 34 is connected to a water source through a cooling water circuit. The cover plate 33 covers the open end of the outer cylinder 32, and has a water outlet hole. The gap between the outer cylinder 32 and the inner cylinder 31, and the gap between the cover plate 33 and the sealed end of the inner cylinder 31, communicate to form a second receiving cavity for the circulating flow of cooled water. Cooling water is injected into the second receiving cavity through the water injection connector 34. The cooling water flows along the annular pit, which can cool the laser displacement sensor 1 and other components more evenly, improve the cooling effect, and ensure the normal operation of the device in harsh industrial environments such as high temperature. After the cooling water completes the cooling cycle, it is discharged out through the water outlet.
[0053] As another embodiment of the specific structure of the aforementioned water-cooling component 3, in this embodiment, the water-cooling component 3 includes: an inner tube, an outer cylinder 32, and a cover plate 33; the inner cavity of the inner tube is a first receiving cavity, and several annular recesses are formed on the outer side wall of the inner tube along its length, which serve as flow channels for cooling water. The outer cylinder 32 is sleeved on the circumferential outer side of the inner tube, and the sealed end of the outer cylinder 32 is sealed to the front end of the inner tube. A water injection connector 34 is provided on the outer cylinder 32, which is made of a metal material (such as copper) and is connected to a water source through a cooling water circuit. The cover plate 33 is placed on the open end of the outer cylinder 32, and a water outlet is formed on the cover plate 33. The laser displacement sensor 1 is sealed to the inner tube. Preferably, the rear end of the outer shell of the laser displacement sensor 1 is aligned with the rear end of the inner tube, so that cooling water will not flow into the first receiving cavity. The gap between the outer cylinder 32 and the inner tube, and the gap between the cover plate 33 and the rear end of the housing of the laser displacement sensor 1, form a second receiving cavity for the circulation of cooling water. Cooling water is injected into the second receiving cavity through the water injection connector 34. The cooling water flows along the annular recess, which can more evenly cool the laser displacement sensor 1 and other components, improve the cooling effect, and ensure the normal operation of the device in harsh industrial environments such as high temperature. After the cooling water completes the cooling cycle, it is discharged out through the water outlet.
[0054] In two preferred embodiments of the specific structure of the aforementioned water-cooled component 3, a plug (not shown in the figure) is provided in the through hole of the cover plate 33. The plug is used to prevent cooling water leakage and ensure that the cooling water can smoothly complete the cooling cycle. An annular groove is provided in the middle of the outer cylinder 32 for connecting the bracket. By engaging the retaining ring or groove of the bracket with the annular groove, the outer cylinder 32 can be firmly installed on the bracket, thereby achieving the fixation and positioning of the device; and making it easier for the operator to hold the outer cylinder 32. When manual operation or adjustment of the device is required, the operator can place their fingers in the annular groove to hold the outer cylinder 32 more stably, thereby facilitating operation and adjustment.
[0055] To better adapt to the high-temperature, high-pressure industrial environment, the water-cooling component 3 is made of corrosion-resistant material. Preferably, the lens barrel 22 is made of light-transmitting material, which reduces laser beam loss. A dust-proof coating is applied to the lens to reduce dust (and impurities) adhering to it.
[0056] As is known from common technical knowledge, this utility model can be implemented through other embodiments that do not depart from its spirit or essential characteristics. Therefore, the disclosed embodiments described above are merely illustrative in all respects and are not the only ones. All modifications within the scope of this utility model or its equivalents are included in this utility model.
Claims
1. A laser ranging device for measuring the distance of a rolling mill pusher, characterized in that, The laser ranging device includes: A laser displacement sensor, which is used to emit and receive laser beams; A beam straightening assembly, located in front of the laser displacement sensor, guides and constrains the propagation direction of the laser beam from the laser displacement sensor, and adjusts the laser beam from a divergent beam into a parallel beam, so that the laser beam reaches the target pusher; and A water-cooling assembly, wherein the water-cooling assembly is provided with a first accommodating cavity and a second accommodating cavity that are not interconnected in a direction from the inside to the outside, the first accommodating cavity is used to accommodate the laser displacement sensor and at least part of the optical rectifier assembly, and the second accommodating cavity is filled with cooling water for cooling the contents of the first accommodating cavity. The outer side of the cavity wall of the first receiving cavity is provided with several annular recesses along the length direction.
2. The laser ranging device for measuring the distance of a rolling mill pusher according to claim 1, characterized in that, The laser displacement sensor includes: a housing, a laser emitter, and a laser receiver; The outer wall of the outer casing is in contact with the inner wall of the water-cooling assembly; The laser emitter and the laser receiver are an integrated structure located inside the housing; Both the laser beam emitted by the laser emitter and the laser beam reflected by the measurement target propagate along the axis of the optical assembly.
3. The laser ranging device for measuring the distance of a rolling mill pusher according to claim 2, characterized in that, The laser displacement sensor also includes: a timer, a processor, and a built-in battery disposed within the housing; The timer is used to record the round-trip time of the laser beam; The processor is connected to the timer and is used to calculate the distance the pusher moves; The built-in battery is connected to the timer, the laser emitter, the laser receiver, and the processor, respectively.
4. The laser ranging device for measuring the distance of a rolling mill pusher according to claim 1, characterized in that, The optical rectification component includes: a laser transmission tube and a lens barrel; The inner cavity of the lens barrel has an I-shaped cross section, and a lens is installed at the front end of the lens barrel; The front end of the laser transmission tube is located at the rear end of the inner cavity of the lens. The laser transmission tube is composed of a cylindrical part and a tapered part. The inner wall of the cylindrical part is provided with a threaded structure along the length direction for connecting with the laser displacement sensor. The tapered part is located on the front side of the cylindrical part. The inner cavity of the tapered part gradually decreases in the direction from back to front.
5. The laser ranging device for measuring the distance of a rolling mill pusher according to claim 1, characterized in that, The water-cooling assembly includes: an inner cylinder, an outer cylinder, and a cover plate; The inner cavity of the inner cylinder is the first receiving cavity, and the inner cylinder has a plurality of annular recesses on its outer side wall along the length direction; The outer cylinder is sleeved around the inner cylinder in the circumferential direction. The sealed end of the outer cylinder is sealed to the open end of the inner cylinder. A water injection connector is provided on the outer cylinder, and the water injection connector is connected to a water source through a cooling water circuit. The cover plate is installed over the open end of the outer cylinder, and the cover plate has a water outlet hole; The gap between the outer cylinder and the inner cylinder communicates with the gap between the cover plate and the sealing end of the inner cylinder to form a second receiving cavity for circulating the cooling water.
6. The laser ranging device for measuring the distance of a rolling mill pusher according to claim 1, characterized in that, The water-cooling assembly includes: an inner tube, an outer cylinder, and a cover plate; The inner cavity of the inner tube is the first receiving cavity, and the inner tube has a plurality of annular recesses on its outer side wall along its length. The outer cylinder is sleeved around the inner tube, and the sealed end of the outer cylinder is sealed to the front end of the inner tube. The outer cylinder is provided with a water injection connector, which is connected to a water source through a cooling water circuit. The cover plate is installed over the open end of the outer cylinder, and the cover plate has a water outlet hole; The laser displacement sensor is sealed to the inner tube; The gap between the outer cylinder and the inner tube communicates with the gap between the cover plate and the rear end of the housing of the laser displacement sensor to form a second receiving cavity for circulating the cooling water.
7. The laser ranging device for measuring the distance of a rolling mill pusher according to claim 5 or 6, characterized in that, The through-hole of the cover plate is fitted with a plug to prevent the cooling water from leaking; and The outer cylinder has an annular groove in the middle for connecting the bracket and for the operator to hold the outer cylinder.
8. The laser ranging device for measuring the distance of a rolling mill pusher according to claim 1, characterized in that, The water-cooling components are made of corrosion-resistant materials.
9. The laser ranging device for measuring the distance of a rolling mill pusher according to claim 4, characterized in that, The lens barrel is made of light-transmitting material; and The lens is provided with a dust-proof coating to reduce dust adhesion to the lens.
10. The laser ranging device for measuring the distance of a rolling mill pusher according to claim 2, characterized in that, The optical assembly and the housing are connected by a sensor mounting base for securing the integrated structure.