Raw material storing and taking system of wood chip storage yard and raw material storing and taking control method

Abstract

The invention discloses a raw material storing and taking system of a wood chip storage yard. The raw material storing and taking system comprises unloading equipment and material taking equipment. The unloading equipment comprises a stack type unloader and a limiter; the stack type unloader comprises a main body support, a rotating support arranged on the main body support, a sliding rail arranged on the rotating support and a skip car arranged on the sliding rail in a sliding mode. The limiting device is installed on the rotating support and divides the sliding rail into a plurality of different discharging areas, and the discharging end of the skip car is limited to discharge in the preset discharging areas. The unloading equipment in the raw material storing and taking system comprises the stack type unloader, the rotating support in the stack type unloader can rotate in the circumferential direction in the unloading process, and then a limiting stopper is matched to enable a skip car to unload materials in a preset unloading area on a sliding rail; therefore, raw materials of different types and different water contents are unloaded into fan-shaped ground areas with different radial ranges, different wood chip raw materials are unloaded and stored in different areas, follow-up invoking is facilitated, and the invoking efficiency is improved. The invention further provides a raw material access control method.

Description

Technical Field

[0001] This application relates to the field of raw material storage and retrieval technology in the pulp and paper industry, and more specifically, to a raw material storage and retrieval system for a wood chip yard, and also includes a raw material storage and retrieval control method for a wood chip yard. Background Technology

[0002] In the pulp and paper industry, wood chip storage yards are key facilities for storing and retrieving raw materials, directly affecting the continuity and stability of subsequent pulping processes.

[0003] The traditional unloading method for wood chip yards involves configuring work units with unloading channels, installing belt conveyors on the unloading channels, and setting up stockpiles on both sides of the unloading channels. The stockpiles on both sides are divided into grid areas. The specific unloading location is selected based on the volume or height of the material in the grid area. Empty grids are selected for unloading first, and if there are no empty grids, grids with lower height or smaller volume are selected for unloading.

[0004] In existing technologies, wood chip raw materials are unloaded only based on the amount of material stored in pre-divided grid areas in the stockpile, resulting in the mixed stacking of different types of wood chips with different moisture contents, making it difficult to effectively distinguish them, and causing difficulties in later retrieval and low efficiency. Summary of the Invention

[0005] In view of this, this application provides a raw material storage and retrieval system for a wood chip yard, which can unload and store different wood chip raw materials in different areas, facilitating subsequent retrieval and improving retrieval efficiency. This application also provides a raw material storage and retrieval control method for the above-mentioned raw material storage and retrieval system.

[0006] To achieve the above objectives, this application provides the following technical solution: a stack-type unloader utilizing a limit switch.

[0007] A raw material storage and retrieval system for a wood chip yard includes unloading equipment and retrieving equipment; the unloading equipment includes a stack-type unloader and a limiter; the stack-type unloader includes a main support, a rotating support disposed on the main support, a slide rail disposed on the rotating support, and a trolley slidably disposed on the slide rail; the limiter is installed on the rotating support and divides the slide rail into multiple different unloading areas to restrict the unloading end of the trolley from unloading within the preset unloading area.

[0008] Optionally, in the above-described raw material storage and retrieval system, the installation position of the limiter on the rotating bracket is adjustable to adjust the size of each unloading area.

[0009] Optionally, in the above-mentioned raw material storage and retrieval system, there is one limiter, and the unloading area includes an inner diameter area and an outer diameter area.

[0010] Optionally, the above-mentioned raw material storage and retrieval system further includes a controller; the limit switch is a limit switch connected to the controller; the controller is used to control the unloading end of the material cart to unload within the preset unloading area according to the signal fed back by the limit switch.

[0011] Optionally, in the above-mentioned raw material storage and retrieval system, the unloading equipment further includes a belt conveyor for conveying wood chips to the material cart.

[0012] Optionally, in the above-mentioned raw material storage and retrieval system, the material retrieval equipment includes a screw conveyor.

[0013] A method for controlling the storage and retrieval of raw materials in a wood chip yard, used in any of the above-described technical solutions' raw material storage and retrieval systems, includes an unloading method; the unloading method includes:

[0014] (1) The material cart receives wood chips;

[0015] (2) The material cart slides back and forth along the slide rail and unloads material. During the back and forth sliding process, the unloading end of the material cart is always in the preset unloading area under the limiting action of the limiter.

[0016] (3) If the material car has no incoming material or the ground material area corresponding to the preset unloading area is full, stop unloading.

[0017] Optionally, in the above raw material storage and retrieval control method, the method further includes the following step before step (1):

[0018] (01) The controller of the raw material storage and retrieval system receives incoming material information and unloading request information, and then allocates an unloading area according to the incoming material information. The unloading area is the preset unloading area.

[0019] (02) The controller controls the belt conveyor of the unloading equipment to transport raw materials to the material car.

[0020] Optionally, in the above raw material storage and retrieval control method, the raw material storage and retrieval system is multiple sets; the allocation of the unloading area in step (01) includes allocating the raw material storage system and the unloading area of ​​the raw material storage system;

[0021] The steps following step (01) and before step (02) include:

[0022] (121) Use a distributor to transport the raw materials to the belt conveyor of the raw material storage system allocated in step (01).

[0023] Optionally, in the above raw material storage and retrieval control method, after step (01) and before step (02), the method further includes:

[0024] (122) The controller adjusts the position of the limiter of the raw material storage system allocated in step (121) based on the incoming material information, so as to adjust the size of the preset unloading area.

[0025] This application provides a raw material storage and retrieval system for a wood chip yard, including unloading equipment and retrieving equipment; the unloading equipment includes a stack unloader and a limiter; the stack unloader includes a main support, a rotating support disposed on the main support, a slide rail disposed on the rotating support, and a trolley slidably disposed on the slide rail; the limiter is installed on the rotating support and divides the slide rail into multiple different unloading areas to restrict the unloading end of the trolley from unloading within a preset unloading area.

[0026] The unloading equipment in the raw material storage and retrieval system of the aforementioned wood chip yard includes a stack-type unloader. The rotating support in the stack-type unloader can rotate circumferentially during the unloading process. In conjunction with the limiter, the unloading end of the material cart unloads material in a preset unloading area on the slide rail. This allows different types of raw materials with different moisture contents to be unloaded into fan-shaped ground areas with different radial ranges, enabling different wood chip raw materials to be unloaded and stored in different areas, facilitating subsequent retrieval and improving retrieval efficiency.

[0027] This application also provides a raw material storage and retrieval control method for the above-mentioned raw material storage and retrieval system. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 A schematic diagram of the raw material storage and retrieval system for a wood chip yard provided in an embodiment of this application;

[0030] Figure 2 A schematic diagram of the fan-shaped ground material area formed by the unloading equipment in the raw material storage and retrieval system provided in this application embodiment;

[0031] Figure 3 A schematic diagram of the material conveying process of a raw material system for a wood chip yard is provided for an embodiment of this application;

[0032] in, Figure 1-2 middle:

[0033] Unloading equipment 100; stack unloader 101; rotating support 111; support arm 112; main support 113; belt conveyor 102;

[0034] Material handling equipment 200; screw conveyor 201;

[0035] Inner circle fabric area 11, outer circle fabric area 12. Detailed Implementation

[0036] This application discloses a raw material storage and retrieval system for a wood chip yard, which can unload and store different types of wood chips in different areas, facilitating subsequent retrieval and improving retrieval efficiency. This application also discloses a raw material storage and retrieval control method for the above-mentioned raw material storage and retrieval system.

[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0038] Please see Figures 1-3 This application provides a raw material storage and retrieval system for a wood chip yard, including an unloading device 100 and a retrieving device 200. The unloading device 100 includes a stack unloader 101 and a limiter. The stack unloader 101 includes a main support 113, a rotating support 111 disposed on the main support 113, a slide rail disposed on the rotating support 111, and a slidable trolley disposed on the slide rail. The limiter is installed on the rotating support 111 and divides the slide rail into multiple different unloading areas to restrict the unloading end of the trolley from unloading within the preset unloading area.

[0039] In the above-mentioned raw material storage and retrieval system of wood chip yard, the unloading equipment 100 is equipped with a stack unloader 101, and the rotating bracket 111 in the stack unloader 101 can rotate circumferentially during the unloading process. In conjunction with the limiter, the unloading end of the material car is unloaded in the preset unloading area on the slide rail, thereby realizing the unloading of different types of raw materials with different moisture contents into the fan-shaped ground material area with different radial ranges. This allows different wood chip raw materials to be unloaded and stored in different areas, which is convenient for subsequent retrieval and improves retrieval efficiency.

[0040] The rotating bracket 111 is long-arm shaped, connected to the main bracket 113 at its central, off-center position, and connected to the lower end of the main bracket 113 via a support arm 112. Two support arms 112 may be provided, distributed on both sides of the main bracket 113. The upper end of the support arm 112 is connected to a position in the rotating bracket 111 furthest from the main bracket 113.

[0041] In one embodiment, the rotating bracket 111 is fixedly connected to the main bracket 113, and the bottom end of the main bracket 113 is rotatably mounted on the base. During unloading, the rotating bracket 111 is rotated by rotating the main bracket 113 on the base. In another embodiment, the rotating bracket 111 is rotatably mounted on the main bracket 113, and the bottom end of the support arm 112 is rotatably mounted on the main bracket 113. During unloading, the rotating bracket 111 and the support arm 112 rotate together around the main bracket 113.

[0042] The rotating support 111 rotates within a preset angle range. Those skilled in the art will understand that during the unloading process, the rotating support 111 initially remains stationary, while the material trolley continuously reciprocates to unload within the preset unloading area until the raw material on the ground accumulates to a sufficient height (the unloading end of the material trolley is equipped with a radar level gauge used to detect the height of the raw material accumulation on the ground). Then, the rotating support 111 rotates to a certain angle (the specific value of this angle is not limited, as long as it rotates until the radar level gauge detects that the height of the raw material accumulation on the bottom surface is less than a pre-set value) and stops rotating. During the rotation of the rotating support and after it stops rotating, the material trolley continues to reciprocate along the slide rail and unload within the preset unloading area until the raw material on the ground accumulates to a sufficient height. Then, the rotating support 111 repeats the previous rotation action, while the material trolley continues to unload within the preset unloading area. This process continues until the rotating support 111 reaches the limit angle of the preset angle range, and the material trolley unloads until the raw material accumulation on the ground is sufficient, thus completing the unloading of the fan-shaped ground material area.

[0043] In some embodiments, the installation position of the limiter on the rotating bracket 111 is adjustable to adjust the size of each unloading area to meet the unloading needs of various raw materials. For example, the limiter is installed on the rotating bracket 111 in a direction that allows it to slide, and the sliding direction of the limiter is set to be parallel to the extension direction of the slide rail; the limiter can be configured to be driven to slide by a hydraulic cylinder, a pneumatic cylinder, or a motor gear mechanism.

[0044] The limiter can be set to one, and the corresponding unloading area includes the inner diameter area and the outer diameter area; during the unloading process, when the material trolley unloads in the inner diameter area, the material falls to the fan-shaped inner circle ground material area 11 on the ground, and when the material trolley unloads in the outer diameter area, the material falls to the fan-shaped outer circle ground material area 12 on the ground.

[0045] The aforementioned raw material storage and retrieval system also includes a controller; the limit switch is a limit switch connected to the controller signal; the controller is used to control the material cart to move to the preset unloading area for unloading based on the signal feedback from the limit switch. Specifically, when the material cart reaches the limit switch corresponding to the preset unloading area, the controller can control the material cart to stop to prevent unloading from entering the wrong area.

[0046] The sliding drive device of the limit switch can be set to be controlled by the controller; the radar level gauge installed at the unloading end of the material cart is connected to the controller signal, and the reciprocating motion of the material cart along the slide rail and the unloading action are both controlled by the controller.

[0047] The unloading equipment 100 also includes a belt conveyor 102, which is used to transport wood chips to the material cart. Those skilled in the art will understand that the rotating support 111 in the stack unloader 101 is mounted at the top of the main support 113, and is elevated; the belt conveyor 102 also needs to be elevated via a support to ensure that it can transport wood chip raw materials to the material cart. The belt conveyor 102 is controlled by a controller.

[0048] In one embodiment, the material cart is configured as a discharge belt conveyor, whose belt continuously receives material and discharges it from one end during rotation. The stack-type discharger 101 also includes a central tower, the top of which is used to receive wood chips conveyed by the belt conveyor 102, and the bottom of which is used to convey the wood chips to the discharge belt conveyor.

[0049] The central tower is installed on the rotating support 111. When the unloading end of the unloading belt is in any unloading area, the unloading belt can receive the wood chip raw material output from the bottom of the central tower.

[0050] The material handling equipment 200 includes a screw conveyor 201. During the material handling process, the screw conveyor 201 rotates as a whole according to the material handling progress to maintain close contact with the end of the material pile. At the start of material handling, the screw conveyor 201 is initially positioned at one end of the fan-shaped area where the material pile is located and continuously outputs material until all material near the screw conveyor 201 has been conveyed. Then, the screw conveyor 201 stops conveying material and rotates to move closer to the material pile. Afterward, the screw conveyor 201 resumes conveying material, and this process is repeated to complete the unloading of the preset unloading area. The material handling equipment 200 is controlled by a controller.

[0051] The raw material storage and retrieval system provided in this application can effectively distinguish different types of wood chips. In specific applications, multiple sets of raw material storage and retrieval systems can be deployed as needed to ensure that more different types of wood chip raw materials are stored in separate areas, meeting the needs of zoned storage for wood chip transportation. After each set of raw material storage and retrieval systems is unloaded and piled up, it forms a material pile (which contains various raw materials arranged in different areas). Each set of raw material storage and retrieval systems can be configured to be controlled by the same controller.

[0052] In one embodiment, the wood chip yard has two berths and five sets of raw material access systems, as detailed in the appendix. Figure 3 The incoming materials from the two berths are connected to the belt conveyors 102 of each set of raw material storage and retrieval systems through multi-stage distributors, so as to realize the transportation of wood chip raw materials to any unloading area of ​​any raw material storage and retrieval system as needed.

[0053] The raw material storage and retrieval system provided in this application allows for the storage of different wood chip raw materials in separate areas, improving the efficiency of raw material turnover and preventing the quality of wood chip raw materials from deteriorating due to excessive storage time in large quantities.

[0054] In addition, those skilled in the art will understand that the pulp and paper industry requires a variety of raw materials in a certain ratio. In this application, different raw materials are stored in separate areas, which can improve space utilization and facilitate the scientific planning of the storage area layout according to the ratio requirements of pulp and paper making, thereby improving the accuracy of wood chip ratio by 10%-20%.

[0055] Furthermore, in existing technologies, various wood chip raw materials are mixed and stacked. When different types of wood chips are needed for pulp and paper production, it is often difficult to retrieve sufficient quantities of various raw materials from the same pile. This often requires opening multiple material retrieval devices 200 for each pile, causing inconvenience and energy waste. In this application, however, different raw materials are stored in separate areas within each pile, and the unloading area for wood chip raw materials can be planned according to the needs of pulp and paper production before unloading the pile. This reduces the number of material retrieval devices 200 that need to be opened during material retrieval.

[0056] Each raw material storage and retrieval system is located in a circular storage yard with a diameter that can be set to 140 meters. The storage yard can be equipped with cameras and weight sensors to monitor the status of raw materials in each unloading area and in areas where unloading has been completed in real time.

[0057] This application also includes a raw material storage and retrieval control method for a wood chip yard, used in the raw material storage and retrieval system provided in the embodiments of this application, including an unloading method; the unloading method includes:

[0058] (1) The material cart receives wood chips;

[0059] (2) The material cart slides back and forth along the slide rail and unloads the material. During the back and forth sliding process, the unloading end of the material cart is always in the preset unloading area under the limiting action of the limiter.

[0060] (3) Stop unloading when the material car has no incoming material or the ground material area corresponding to the preset unloading area is full.

[0061] In steps (1), (2), and (3) above, the movement of the material cart is controlled by the controller.

[0062] Step (1) includes the following:

[0063] (01) The controller of the raw material storage and retrieval system receives the incoming material information and the unloading request information, and then allocates the unloading area according to the incoming material information. The unloading area is the preset unloading area.

[0064] The controller is connected to a data acquisition unit to collect the incoming material information and unloading request information input by the user. When allocating unloading areas, the controller can allocate unloading areas according to the arrival time of the material, as well as the origin, type, moisture content, and other information of the raw materials. For example, wood chips with similar origins and types can be allocated to the same pile or piles that are close to each other. Based on the arrival time, the wood chips that arrive first can be allocated to the inner area of ​​the same pile, and the wood chips that arrive later can be allocated to the outer area of ​​the pile.

[0065] (02) The controller controls the belt conveyor 102 of the unloading equipment 100 to transport raw materials to the material car.

[0066] In a scheme where there are multiple raw material storage and retrieval systems, the allocation of the unloading area in step (01) includes allocating the raw material storage system and the unloading area of ​​the raw material storage system.

[0067] The steps following step (01) and before step (02) include:

[0068] (121) The raw materials are transported to the belt conveyor 102 of the raw material storage system allocated in step (01) using a distributor.

[0069] The process after step (01) and before step (02) includes: (122) The controller adjusts the position of the limit switch of the raw material storage system allocated in step (121) based on the incoming material information, so as to adjust the size of the preset unloading area. This step (122) can be set before step (121) or after step (122), and this embodiment does not make specific limitations.

[0070] The steps following step (01) and before step (121) include:

[0071] (120) The wood chips are tested in the laboratory and the wood chip parameters are confirmed. The detected wood chip parameters and the allocated unloading area are stored in the memory connected to the controller for subsequent retrieval of raw materials. The wood chip parameters include at least the origin parameters, the type parameters, and the moisture content parameters. If step (122) is before step (121), step (120) can be performed simultaneously with step (122), or it can be set before step (122) or after step (122).

[0072] The raw material storage and retrieval control method provided in this application also includes a material retrieval method, which includes: a controller controlling the screw conveyor 201 of the material retrieval equipment 200 to simultaneously retrieve materials from different material areas of the material pile. Those skilled in the art will understand that the unloading volume of different raw materials in the same material pile is pre-designed according to pulping needs. Correspondingly, during material retrieval and pulping, materials can be retrieved simultaneously from different material areas of the same material pile, which not only meets the pulping ratio requirements but also improves material retrieval efficiency.

[0073] The original access control method provided in this application is applied to the raw material access control system provided in the above embodiments, and has the same technical effects as the raw material access control system provided in the above embodiments, which will not be repeated here.

[0074] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0075] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A raw material storage and retrieval system for a wood chip yard, characterized in that, It includes unloading equipment and unloading equipment; the unloading equipment includes a stack-type unloader and a limiter; the stack-type unloader includes a main support, a rotating support disposed on the main support, a slide rail disposed on the rotating support, and a material cart slidably disposed on the slide rail; the limiter is installed on the rotating support and divides the slide rail into multiple different unloading areas to restrict the unloading end of the material cart from unloading within the preset unloading area.

2. The raw material storage and retrieval system according to claim 1, characterized in that, The installation position of the limiter on the rotating bracket is adjustable to adjust the size of each unloading area.

3. The raw material storage and retrieval system according to claim 2, characterized in that, The limiter is one unit, and the unloading area includes an inner diameter area and an outer diameter area.

4. The raw material storage and retrieval system according to claim 1, characterized in that, It also includes a controller; the limit switch is a limit switch connected to the controller; the controller is used to control the unloading end of the material cart to unload within the preset unloading area according to the signal fed back by the limit switch.

5. The raw material storage and retrieval system according to claim 1, characterized in that, The unloading equipment also includes a belt conveyor for transporting wood chips to the material cart.

6. The raw material storage and retrieval system according to claim 1, characterized in that, The material handling equipment includes a screw conveyor.

7. A method for controlling the storage and retrieval of raw materials in a wood chip yard, characterized in that, The raw material storage and retrieval system according to any one of claims 1-6, characterized in that it includes a discharge method; the discharge method includes: (1) The material cart receives wood chips; (2) The material cart slides back and forth along the slide rail and unloads material. During the back and forth sliding process, the unloading end of the material cart is always in the preset unloading area under the limiting action of the limiter. (3) If the material car has no incoming material or the ground material area corresponding to the preset unloading area is full, stop unloading.

8. The raw material storage and retrieval control method according to claim 7, characterized in that, The steps preceding step (1) also include: (01) The controller of the raw material storage and retrieval system receives incoming material information and unloading request information, and then allocates an unloading area according to the incoming material information. The unloading area is the preset unloading area. (02) The controller controls the belt conveyor of the unloading equipment to transport raw materials to the material car.

9. The raw material storage and retrieval control method according to claim 8, characterized in that, The raw material storage and retrieval system is multiple sets; the allocation of the unloading area in step (01) includes allocating the raw material storage system and the unloading area of ​​the raw material storage system; The steps following step (01) and before step (02) include: (121) Use a distributor to transport the raw materials to the belt conveyor of the raw material storage system allocated in step (01).

10. The raw material storage and retrieval control method according to claim 8, characterized in that, The steps following step (01) and before step (02) include: (122) The controller adjusts the position of the limiter of the raw material storage system allocated in step (121) based on the incoming material information, so as to adjust the size of the preset unloading area.

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