Chute sampler for cement production

Abstract

The invention provides a chute sampler for cement production, the chute sampler comprises a homogenizing and scattering device, a confluence device and a rotary sampling device which are sequentially arranged along the material flow direction, the homogenizing and scattering device comprises a suspended chain and is used for scattering materials and buffering kinetic energy; the converging device comprises two inclined guide plates and is used for converging materials on the total cross section of the chute to a sampling area; the rotary sampling device comprises a driving part, a sampling pipe and a controller, and the driving part drives the sampling pipe to rotate, so that a material taking opening of the sampling pipe is switched between a sampling station facing materials and an avoiding station backing on to the materials. Through the combined action of chain homogenization, diversion convergence and rotary interception, the representativeness of samples is ensured, meanwhile, part abrasion is effectively reduced, full-automatic sampling is achieved, and the problems that in the prior art, sampling representativeness is poor, abrasion is serious, and the automation degree is low are solved.

Description

Technical Field

[0001] This invention relates to the field of cement sampling technology, and more specifically, to a chute sampler for cement production. Background Technology

[0002] Cement, an important building material, is mainly made from limestone, clay, and other raw materials through calcination and grinding. During cement production, real-time analysis of the chemical composition and fineness of semi-finished or finished products is crucial for ensuring the stability of cement quality. Air conveying chutes (or simply chutes) are widely used for conveying easily fluidized powdery materials such as cement and raw meal due to their simple structure and low energy consumption. Traditional methods for sampling and analyzing materials within the chutes often involve manual operation or the use of simple mechanical sampling devices. For example, existing technologies include manually controlled spiral sampling devices that require operators to insert their sampling tubes into the chutes for sampling.

[0003] The following technical defects exist in the existing technology for cement sampling: (1) Severe wear: The cross section of the inclined chute is large and the internal material flows at a high speed in the fluidized state. The sampling component of the sampling device extends directly into the main channel and is subjected to the impact and grinding of high-speed material for a long time. The core parts wear quickly, resulting in high maintenance costs and short equipment life. (2) Poor sample representativeness: Traditional manual sampling or fixed sampling ports can usually only capture material at a fixed point or a cross section of the inclined chute. As the material flows in the inclined chute, there are phenomena such as particle classification and uneven flow velocity (e.g., the material characteristics at the edge and the center are different). The samples obtained by this "local interception" method often deviate from the overall true average properties of the material, making it difficult to accurately reflect the actual production situation and bringing errors to subsequent chemical analysis. (3) Safety hazards and low efficiency: Manual sampling requires operators to be close to the operating equipment, which poses risks of mechanical injury and dust pollution. At the same time, manual operation is inefficient and cannot meet the 24-hour continuous, timed and automated sampling requirements, which increases production costs and makes it difficult to meet the quality control requirements of modern large-scale cement production. Therefore, we have made improvements to this and proposed a chute sampler for cement production. Summary of the Invention

[0004] The purpose of this invention is to provide a chute sampler for cement production, so as to solve the technical problems of poor sample representativeness, severe component wear and low degree of automation in the prior art.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solution: A chute sampler for cement production is proposed to improve the above-mentioned problems.

[0006] The application is as follows: A chute sampler for cement production includes a homogenizing and dispersing device, a confluence device, and a rotary sampling device arranged sequentially along the material flow direction. The homogenizing and dispersing device is located inside the upstream of the inclined chute and includes multiple suspended chains for dispersing and homogenizing the material flowing through the inclined chute. The confluence device is located downstream of the homogenization and dispersing device. It includes two inclined guide plates arranged opposite each other. The two inclined guide plates are fixed to the inner walls of the two sides of the chute respectively, and form a narrowing channel from wide to narrow in the width direction of the chute, which is used to gather the material of the entire cross section of the chute to the preset sampling area. The rotary sampling device is located downstream of the confluence device, and its sampling port is set in accordance with the sampling area formed by the confluence device. The rotary sampling device includes a drive unit, a sampling tube, and a controller; One end of the sampling tube is the sampling port, and the other end is the discharge port. The sampling tube is rotatably installed on the inclined chute, and its sampling port is located inside the inclined chute. The drive end of the drive unit is connected to the sampling tube and is used to drive the sampling tube to rotate around its axial center line so that the sampling port can switch between the sampling station facing the material flow direction and the avoidance station facing away from the material flow direction. The controller is electrically connected to the drive unit and is used to control the action of the drive unit.

[0007] As a preferred technical solution of this application, the homogenizing and dispersing device also includes a mounting beam that spans and is fixed to the upper part of the inclined chute. The upper end of the chain is detachably suspended on the mounting beam through a connector, and the lower end of the chain extends freely and is close to the bottom of the inclined chute.

[0008] As a preferred technical solution of this application, the inclined guide plate of the converging device includes a front guide section and a rear gathering section. The front guide section extends smoothly along the material flow direction to guide the material to move towards the center of the inclined trough. The spacing between the plates of the rear gathering section gradually decreases along the material flow direction, eventually forming a discharge port.

[0009] As a preferred technical solution of this application, the rotary sampling device also includes a mounting flange and a material discharge switch; The mounting flange is a ring-shaped sealing structure, which is fixedly fitted to the part where the sampling tube passes through the side wall of the inclined groove, and is used to achieve rotational sealing between the sampling tube and the inclined groove wall; The material discharge switch is located at the outlet of the sampling tube and is electrically connected to the controller. It is used to open when the sampling tube is in the sampling position and close when the sampling tube is in the avoidance position.

[0010] As a preferred technical solution of this application, the rotary sampling device also includes a lower gate valve located downstream of the discharge channel. The lower gate valve is electrically connected to the controller and is used to control the final discharge of the accumulated sample.

[0011] As a preferred technical solution of this application, the controller has a sampling program preset in it. The sampling program is configured to: respond to the sampling command, control the drive to rotate forward by a first preset angle, so that the sampling tube is switched to the sampling position, and at the same time control the material drop switch to open. After maintaining the position for a first preset time, control the drive to rotate backward by a second preset angle to reset, so that the sampling tube is switched to the avoidance position, and at the same time control the material drop switch to close. The sampling program is also configured to perform the above actions multiple times in a loop to achieve multiple sampling.

[0012] As a preferred technical solution of this application, the inclined trough sampler also includes an observation device, which is disposed on the side wall of the inclined trough between the confluence device and the rotary sampling device. The observation device includes a manhole assembly and mounting hardware; The manhole assembly includes an observation port formed in the side wall of the inclined groove, a sealing cover for closing the observation port, and a transparent viewing window provided on the sealing cover; The mounting hardware is used to seal and secure the manhole assembly to the side wall of the sloping groove.

[0013] As a preferred technical solution of this application, the driving component is a rotary cylinder or a servo motor.

[0014] As a preferred technical solution of this application, the sampling port of the sampling tube has an oblique opening structure.

[0015] As a preferred technical solution of this application, the inclined guide plate is installed on the inner wall of the inclined groove by a fastener with an elongated hole, so that the installation angle of the inclined guide plate is adjustable.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: In the scheme of this application: 1. When high-speed cement material passes through the chain suspended in the homogenizing and dispersing device, the chain oscillates flexibly under the impact of the material. On the one hand, this physical disturbance can effectively disperse any lumps or agglomerates that may exist in the chute, so that particles of different sizes and densities are redistributed uniformly before entering the downstream, thus achieving homogenization pretreatment of the material. On the other hand, the oscillation of the chain absorbs part of the kinetic energy of the material, forming a deceleration and protection effect. This significantly reduces the impact and grinding effect of high-speed material on the precision components at the downstream end, significantly extends the service life of core components such as sampling tubes, and reduces equipment maintenance and replacement costs. 2. Through the two opposing inclined guide plates in the confluence device, the converging channel formed by them can force the material flowing through the entire cross section of the chute (including the dead corners at the edges and the central area) to be physically gathered and finally converged to the preset sampling area. This design completely breaks the limitation of traditional sampling methods that can only intercept local materials, ensuring that the sample taken can cover the material in all areas of the chute, providing a prerequisite for obtaining real and comprehensive analysis data in the subsequent sampling process, and fundamentally avoiding the sample deviation problem caused by "local sampling". 3. By combining the sampling tube, driving component, and controller in the rotary sampling device, precise and automated control of the sampling process is achieved. The controller drives the sampling tube to rotate according to a preset program, so that its sampling port can quickly switch between a sampling position facing the material flow direction and an avoidance position facing away from the material flow direction. In the non-sampling state, the sampling port faces away from the material flow, which effectively avoids the continuous scouring and wear of the material on the sampling tube and does not affect the normal material conveying. In the sampling state, the sampling port quickly cuts into the material flow to achieve rapid quantitative interception in 1-2 seconds. At the same time, the controller can preset multiple cyclic sampling programs, and further eliminate random errors caused by instantaneous fluctuations in the material through the accumulation of samples over time, which significantly improves the representativeness of the sample and the reliability of the test data. 4. Through the manhole assembly and transparent window in the observation device, operators can monitor the internal working conditions of the chute in real time without disassembling the main structure of the chute, including the working status of the chain, the material gathering effect of the guide plate, and the operation of the sampling tube. When routine maintenance is required (such as chain replacement, guide plate angle adjustment, or sampling tube cleaning), the operation can be carried out directly by simply opening the manhole, which reduces the maintenance time by more than 60%, greatly reduces downtime costs and maintenance labor intensity, and realizes the integrated "observation-maintenance" dual function. Attached Figure Description

[0017] Figure 1 A schematic diagram of the overall structure of a chute sampler for cement production provided in this application; Figure 2 A schematic diagram of the homogenization and dispersion device of a chute sampler for cement production provided in this application; Figure 3 A schematic diagram of the manifold device for a chute sampler used in cement production, provided in this application; Figure 4 A cross-sectional view and working schematic diagram of the rotary sampling device of an inclined trough sampler for cement production provided in this application; Figure 5 This application provides a schematic diagram of the observation device for an inclined trough sampler used in cement production.

[0018] The image shows: 1. Homogenizing and dispersing device; 11. Mounting beam; 12. Chain; 13. Handle; 2. Combining device; 21. Inclined guide plate; 22. Fixing component; 3. Rotary sampling device; 31. Rotary cylinder; 32. Sampling tube; 321. Feed port; 322. Discharge port; 33. Mounting flange; 34. Material drop switch; 35. Lower slide valve; 36. Coupling; 4. Observation device; 41. Manhole assembly; 411. Sealing cover; 412. Transparent window; 413. Quick-release locking structure; 42. Mounting component; 5. Inclined groove. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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.

[0020] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely to illustrate some embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention. It should be noted that, unless otherwise specified, the embodiments, features, and technical solutions in the embodiments of the present invention can be combined with each other.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] like Figures 1-5As shown, this embodiment proposes a sampler for a chute 5 used in cement production, including a homogenizing and dispersing device 1, a converging device 2, and a rotary sampling device 3 arranged sequentially along the material flow direction. The homogenizing and dispersing device 1 is located upstream of the chute 5 and includes multiple suspended chains 12 for dispersing and homogenizing the material flowing through the chute 5. The converging device 2 is located downstream of the homogenizing and dispersing device 1 and includes two opposing inclined guide plates 21. The two inclined guide plates 21 are respectively fixed to the inner walls of both sides of the chute 5 and form a narrowing channel in the width direction of the chute 5 to gather the material of the entire cross section of the chute 5 to a preset sampling area. The rotary sampling device... Device 3 is located downstream of confluence device 2, and its sampling port 321 is set corresponding to the sampling area formed by confluence device 2. Rotary sampling device 3 includes a drive unit, sampling tube 32, and controller. One end of sampling tube 32 is sampling port 321, and the other end is discharge port 322. Sampling tube 32 is rotatably mounted on inclined chute 5, and its sampling port 321 is located inside inclined chute 5. The drive end of the drive unit is connected to the sampling tube 32 for driving the sampling tube 32 to rotate around its axial center line, so that the sampling port 321 switches between the sampling position facing the material flow direction and the avoidance position facing away from the material flow direction. The controller is electrically connected to the drive unit for controlling the action of the drive unit.

[0023] The homogenizing and dispersing device 1 also includes a mounting beam 11 that spans and is fixed to the upper part of the inclined chute 5. The upper end of the chain 12 is detachably suspended on the mounting beam 11 through a connector, and the lower end of the chain 12 extends freely and is close to the bottom of the inclined chute 5.

[0024] The inclined guide plate 21 of the converging device 2 includes a front guide section and a rear gathering section. The front guide section extends smoothly along the material flow direction to guide the material to move towards the center of the inclined chute 5. The spacing between the plates of the rear gathering section gradually decreases along the material flow direction, eventually forming a discharge port 322.

[0025] The rotary sampling device 3 also includes a mounting flange 33 and a discharge switch 34; the mounting flange 33 is an annular sealing structure, which is fixedly fitted on the part where the sampling tube 32 passes through the side wall of the inclined groove 5, and is used to achieve a rotational seal between the sampling tube 32 and the wall of the inclined groove 5; the discharge switch 34 is set at the discharge port 322 of the sampling tube 32 and is electrically connected to the controller, and is used to open when the sampling tube 32 is in the sampling position and close when the sampling tube 32 is in the avoidance position.

[0026] The rotary sampling device 3 also includes a lower slide valve 35 located downstream of the discharge channel. The lower slide valve 35 is electrically connected to the controller and is used to control the final discharge of the accumulated sample.

[0027] The controller has a pre-set sampling program, which is configured to: respond to a sampling command, control the drive to rotate forward by a first preset angle, so that the sampling tube 32 switches to the sampling position, and at the same time control the material drop switch 34 to open; after maintaining the position for a first preset time, control the drive to rotate backward by a second preset angle to reset, so that the sampling tube 32 switches to the avoidance position, and at the same time control the material drop switch 34 to close; the sampling program is also configured to perform the above actions multiple times in a loop to achieve multiple sampling.

[0028] The sloping trough 5 sampler also includes an observation device 4, which is disposed on the side wall of the sloping trough 5 between the confluence device 2 and the rotary sampling device 3. The observation device 4 includes a manhole assembly 41 and a mounting member 42. The manhole assembly 41 includes an observation port opened on the side wall of the sloping trough 5, a sealing cover 411 for closing the observation port, and a transparent viewing window 412 disposed on the sealing cover 411. The mounting member 42 is used to seal and fix the manhole assembly 41 to the side wall of the sloping trough 5.

[0029] The driving component is a rotary cylinder 31 or a servo motor.

[0030] The sampling port 321 of the sampling tube 32 has an oblique opening structure.

[0031] The inclined guide plate 21 is installed on the inner wall of the inclined groove 5 by a fastener 22 with an elongated hole, so that the installation angle of the inclined guide plate 21 is adjustable.

[0032] like Figure 1 As shown, in a preferred embodiment, based on the above method, this embodiment further provides a sampler for a chute 5 used in cement production, which is installed on the conveying chute 5 of the cement production line. This sampler mainly includes components along the material flow direction (e.g., ...). Figure 1 The homogenizing and dispersing device 1, the confluence device 2, and the rotary sampling device 3 are arranged sequentially (as indicated by the middle arrow). In addition, for ease of monitoring and maintenance, this embodiment also provides an observation device 4 on the side wall of the inclined groove 5 between the confluence device 2 and the rotary sampling device 3.

[0033] like Figures 1-2 As shown, in a preferred embodiment, based on the above method, the homogenizing and dispersing device 1 is further disposed inside the upstream of the inclined chute 5 for pre-processing the material entering the sampling area.

[0034] Specifically, the device includes a mounting beam 11 and multiple chains 12. The mounting beam 11 is fixed across the upper opening or inner wall of the inclined chute 5, for example, by bolts. The upper ends of the chains 12 are detachably suspended from the mounting beam 11 by connectors (such as clips or eye bolts), and the lower ends of the chains 12 hang vertically and extend freely, with their ends close to the bottom of the inclined chute 5 but not in contact with the bottom to avoid obstructing material transport.

[0035] When large pieces or fast-flowing cement material in the inclined chute 5 pass through this point, the chain 12 will oscillate slightly under the impact of the material. This flexible contact can effectively "cut" and break down large pieces of material, making the material particles more evenly distributed; on the other hand, the oscillation of the chain 12 also absorbs some of the material's kinetic energy, acting as a "slowering down" effect, thereby significantly reducing the impact force of the material on the downstream device. The top mounting beam 11 is also equipped with a convenient handle 13, which makes it easy for operators to lift the entire chain 12 assembly for quick replacement and maintenance.

[0036] like Figure 1 and Figure 3 As shown, in a preferred embodiment, based on the above method, the confluence device 2 is further disposed downstream of the homogenizing and dispersing device 1, and is used to forcibly gather the material that has been dispersed and flows through the entire cross section of the inclined chute 5 into a smaller preset area.

[0037] The core structure of this device consists of two inclined guide plates 21, which are symmetrically installed on the inner walls of the inclined chute 5 using dedicated fasteners 22 (such as angle steel and bolts). Each inclined guide plate 21 includes a front guiding section and a rear converging section. The front guiding section extends smoothly along the inner wall of the inclined chute 5, guiding the material at the edge towards the center; the surface of the rear converging section curves towards the center of the inclined chute 5 at a certain arc, so that the distance between the two plates gradually decreases along the material flow direction, eventually forming a narrow discharge channel (or a small-mouth discharge channel).

[0038] The design works by using the tilt angle and guiding curvature of the guide plate to force the material across the entire cross-section of the inclined chute 5 (including the edge dead corners and the central area) to be gathered. This ensures that the subsequent sampling process can capture material from all areas within the chute, fundamentally avoiding the sample deviation problem caused by "partial sampling".

[0039] like Figure 1 and Figure 4 As shown, in a preferred embodiment, based on the above method, the rotary sampling device 3 is further configured as the core execution component of the sampling system. It is located downstream of the confluence device 2, and its sampling port 321 is directly opposite to or located below the discharge channel formed by the confluence device 2 to receive the converged material.

[0040] The device specifically includes a rotary cylinder 31 as a driving component, a sampling tube 32, a mounting flange 33, a material drop switch 34, a lower gate valve 35, and a controller.

[0041] The sampling tube 32 is a hollow tube with a sampling port 321 at one end and a discharge port 322 at the other end. The sampling tube 32 is rotatably mounted on the side wall of the inclined trough 5 via bearings, with the sampling port 321 located inside the inclined trough 5 and the discharge port 322 located outside the inclined trough 5. A rotary cylinder 31 is fixed to the outer wall of the inclined trough 5, and its output shaft is fixedly connected to the end of the sampling tube 32 located outside the inclined trough 5 via a coupling 36, thereby driving the sampling tube 32 to rotate precisely around its axial centerline.

[0042] The mounting flange 33 has an annular sealing structure. Its inner ring is rotatably sealed to the outer wall of the sampling tube 32 through a sealing element (such as an O-ring or packing), while its outer ring is fixedly sealed to the side wall of the inclined trough 5 by bolts. This structure allows the sampling tube 32 to rotate flexibly while ensuring that dust-laden gas and materials in the inclined trough 5 do not leak from the connection.

[0043] A discharge switch 34 (e.g., a small gate controlled by a solenoid valve) is integrated at the end outlet 322 of the sampling tube 32 to precisely control whether material is discharged from the sampling tube 32. A lower gate valve 35 is located at the very downstream end of the entire discharge channel, usually below a temporary storage hopper, to release samples in batches to a downstream sample delivery device or collection container after multiple sampling accumulations.

[0044] The controller (such as a PLC or microcontroller) is electrically connected to the solenoid valve of the rotary cylinder 31, the material drop switch 34, and the actuator of the lower slide gate valve 35, and is used to coordinate and control the actions of each component according to a preset program.

[0045] The above working process is as follows: In the standby state, the controller controls the rotary cylinder 31 to be in the initial position. The sampling port 321 of the sampling tube 32 is kept facing away from the material flow direction under the drive of the cylinder. At this time, the material drop switch 34 and the lower slide valve 35 are both in the closed state. The material gathered by the confluence device 2 passes normally along the inclined channel 5 and flows directly to the next process. The device does not interfere with the normal material conveying. At the same time, the sampling port 321 faces away from the material to avoid high-speed scouring of the material. In sampling mode, when the controller receives a sampling command (which can be a timed trigger or a host computer command), it outputs an electrical signal to drive the rotary cylinder 31 to rotate forward by a preset angle (e.g., 90°), causing the sampling tube 32 to rotate synchronously, so that the sampling port 321 quickly rotates to face the direction of material flow (e.g., ...). Figure 4 (As shown by the dotted line in the middle), at the same time, the controller sends a signal to open the material discharge switch 34. At this time, the material gathered by the confluence device 2 enters the sampling tube 32 through the material inlet 321 under its own gravity and flow inertia, completing a rapid interception (for example, lasting 1-2 seconds). In the reset state, after the sampling time is reached, the controller drives the rotary cylinder 31 to rotate in the opposite direction to reset, the sampling tube 32 and the material inlet 321 return to the opposite direction of material flow, and at the same time the material drop switch 34 is closed to terminate the sampling. To eliminate errors caused by instantaneous fluctuations in materials, multiple cumulative sampling can be performed. The controller can be set to execute the above-mentioned rotation, sampling, and reset cycle multiple times (for example, sampling once every 5 minutes, for a total of 10 times). Each sample is temporarily stored in the temporary storage hopper below after passing through the material drop switch 34. Once the preset cyclic sampling process is completed, the sample is discharged. The controller outputs a signal to drive the lower gate valve 35 to open, and the sample accumulated in the temporary storage hopper flows into the downstream device through the discharge channel, completing the closed loop of sampling and delivery.

[0046] like Figure 5 As shown, the observation device 4 is installed on the side wall of the inclined trough 5 between the confluence device 2 and the rotary sampling device 3, serving as a key auxiliary support component.

[0047] The device includes a manhole assembly 41 and a mounting component 42. The manhole assembly 41 includes a circular or rectangular observation port formed in the side wall of the inclined groove 5, a flip-top sealing cover 411 for closing the observation port, and a transparent viewing window 412 (such as tempered glass) embedded in the sealing cover 411. The sealing cover 411 is pressed and sealed against the wall of the inclined groove 5 by a quick-release locking structure 413 (such as a latch, eccentric wheel clamping device). The mounting component 42 is typically an annular flange structure, the inner diameter of which is adapted to the observation port, and the outer diameter is rigidly fixed to the side wall of the inclined groove 5 by a bolt group, with a sealing gasket added to the contact surface to ensure the airtightness of the connection.

[0048] This device has a dual function: (1) Real-time monitoring is possible: Operators can open the quick-release locking structure 413, flip open the sealing cover 411, and directly observe the internal working conditions of the inclined chute 5 through the transparent window 412, such as the working status of the chain 12, the material gathering effect of the guide plate, and the uniformity of material flow. (2) It can also be convenient to perform maintenance: when it is necessary to replace the chain 12, adjust the angle of the guide plate or clean the sampling tube 32, there is no need to disassemble the main body of the inclined groove 5. Just open the manhole assembly 41 and you can insert tools or hands to operate, which greatly improves maintenance efficiency.

[0049] One embodiment is basically similar to the above technical solution, except that the driving and control methods of the rotating sampling device 3 have been optimized; Given that the rotational resistance of the sampling tube 32 may be significant in certain large inclined troughs 5 or under conditions with high material viscosity, this embodiment replaces the rotary cylinder 31 with a servo motor and a reducer. The servo motor can achieve higher precision angle control and torque output; Meanwhile, the sampling program within the controller is configured with a more flexible sampling strategy. In addition to conventional timed and quantitative sampling, the sampling frequency and duration can be dynamically adjusted based on the production line's load signals (such as feed rate). For example, when the feed rate increases and the material flow rate accelerates, the controller automatically shortens the duration of each sampling session but increases the number of samplings to ensure that the representativeness of the accumulated samples is not affected by changes in flow rate. The servo motor's position feedback function can monitor in real time whether the sampling tube 32 has rotated into position; if jamming occurs, an alarm signal can be issued promptly, improving the system's reliability.

[0050] Another difference in this embodiment lies in the slight adjustment to the structure of the confluence device 2: the fixed inclined guide plate 21 is designed to be adjustable. Specifically, the fixing member 22 has an elongated hole, and the installation angle of the inclined guide plate 21 can be finely adjusted by tightening the bolts within the elongated hole. The operator can adjust the inclination of the guide plate online based on the material convergence feedback from the observation device 4 to achieve the best converging effect and prevent material from accumulating or converging unevenly in front of the guide plate. This adjustable structure allows the sampler to better adapt to different production conditions and material characteristics, improving the product's versatility and adaptability.

[0051] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described herein. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the specific embodiments described above. Therefore, any modifications or equivalent substitutions to the present invention, as well as all technical solutions and improvements that do not depart from the spirit and scope of the invention, are covered within the scope of the claims of the present invention.

Claims

1. A chute sampler for cement production, installed on the conveying chute (5) of a cement production line, characterized in that, It includes a homogenizing and dispersing device (1), a confluence device (2), and a rotary sampling device (3) arranged sequentially along the material flow direction; The homogenizing and dispersing device (1) is located inside the upstream of the inclined chute (5) and includes multiple suspended chains (12) for dispersing and homogenizing the material flowing through the inclined chute (5); The confluence device (2) is located downstream of the homogenization and dispersing device (1) and includes two inclined guide plates (21) arranged opposite to each other. The two inclined guide plates (21) are respectively fixed to the inner walls of the two sides of the chute (5) and form a narrowing channel from wide to narrow in the width direction of the chute (5) to gather the material of the entire cross section of the chute (5) to the preset sampling area. The rotary sampling device (3) is located downstream of the confluence device (2), and its sampling port (321) is set in relation to the sampling area formed by the confluence device (2). The rotating sampling device (3) includes a drive unit, a sampling tube (32), and a controller; One end of the sampling tube (32) is a sampling port (321), and the other end is a discharge port (322). The sampling tube (32) is rotatably installed on the inclined groove (5), and its sampling port (321) is located inside the inclined groove (5). The driving end of the driving component is connected to the sampling tube (32) for driving the sampling tube (32) to rotate around its axial center line so that the sampling port (321) can switch between the sampling station facing the material flow direction and the avoidance station facing away from the material flow direction. The controller is electrically connected to the drive unit and is used to control the operation of the drive unit.

2. The inclined trough sampler for cement production according to claim 1, characterized in that, The homogenizing and dispersing device (1) also includes a mounting beam (11) that spans and is fixed to the upper part of the inclined groove (5). The upper end of the chain (12) is detachably suspended on the mounting beam (11) through a connector, and the lower end of the chain (12) extends freely and is close to the bottom of the inclined groove (5).

3. The inclined trough sampler for cement production according to claim 1, characterized in that, The inclined guide plate (21) of the confluence device (2) includes a front guide section and a rear gathering section. The front guide section extends smoothly along the material flow direction to guide the material to move towards the center of the inclined trough (5). The plate spacing of the rear gathering section gradually decreases along the material flow direction, eventually forming a discharge port (322).

4. The inclined trough sampler for cement production according to claim 1, characterized in that, The rotary sampling device (3) also includes a mounting flange (33) and a material discharge switch (34); The mounting flange (33) is an annular sealing structure, which is fixedly fitted on the part where the sampling tube (32) passes through the side wall of the inclined groove (5) to achieve rotational sealing between the sampling tube (32) and the wall of the inclined groove (5); The material discharge switch (34) is located at the outlet (322) of the sampling tube (32) and is electrically connected to the controller. It is used to open when the sampling tube (32) is in the sampling position and close when the sampling tube (32) is in the avoidance position.

5. A chute sampler for cement production according to claim 4, characterized in that, The rotary sampling device (3) also includes a lower slide valve (35) located downstream of the discharge channel. The lower slide valve (35) is electrically connected to the controller and is used to control the final discharge of the accumulated sample.

6. A chute sampler for cement production according to claim 4 or 5, characterized in that, The controller has a pre-set sampling program, which is configured to: respond to a sampling command, control the drive component to rotate forward by a first preset angle, so that the sampling tube (32) is switched to the sampling station, and at the same time control the material drop switch (34) to open, maintain for a first preset time, control the drive component to rotate in the opposite direction by a second preset angle to reset, so that the sampling tube (32) is switched to the avoidance station, and at the same time control the material drop switch (34) to close; the sampling program is also configured to perform the above actions multiple times in a loop to achieve multiple sampling.

7. A chute sampler for cement production according to claim 1, characterized in that, The sloping trough (5) sampler also includes an observation device (4), which is located on the side wall of the sloping trough (5) between the confluence device (2) and the rotary sampling device (3); The observation device (4) includes a manhole assembly (41) and a mounting component (42). The manhole assembly (41) includes an observation port opened on the side wall of the inclined groove (5), a sealing cover (411) for closing the observation port, and a transparent window (412) disposed on the sealing cover (411). The mounting component (42) is used to seal and fix the manhole assembly (41) to the side wall of the inclined groove (5).

8. A chute sampler for cement production according to claim 1, characterized in that, The driving component is a rotary cylinder (31) or a servo motor.

9. A chute sampler for cement production according to claim 1, characterized in that, The sampling port (321) of the sampling tube (32) has an oblique opening structure.

10. A chute sampler for cement production according to claim 3, characterized in that, The inclined guide plate (21) is installed on the inner wall of the inclined groove (5) by a fastener (22) with an elongated hole, so that the installation angle of the inclined guide plate (21) is adjustable.

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