Self-adaptive pressure regulation and mold rapid replacement system for RDF fuel forming equipment

Abstract

The invention provides an RDF fuel forming equipment self-adaptive pressure regulation and mold rapid replacement system which comprises a feeding bin and a discharging loop, a compression roller module and a circular mold mechanism are arranged in the feeding bin, the lower end of the circular mold mechanism is in butt joint with the discharging loop, the compression roller module is located in the circular mold mechanism, and the lower end of the circular mold mechanism is in butt joint with the discharging loop. The pressing roller module comprises a positioning support, a variable-pitch support, a pressing roller set and a rotating motor, the upper end and the lower end of the pressing roller set are connected with the positioning support and the variable-pitch support respectively, the lower end of the variable-pitch support penetrates through the discharging annular channel, and the driving end of the rotating motor is connected with the positioning support and the variable-pitch support respectively. The circular mold mechanism comprises a plurality of disc molds which are arranged in a sleeved mode, extension rods and hydraulic cylinders are arranged at the upper ends of the disc molds, and certain gaps are formed among the multiple disc molds. The RDF forming device has the beneficial effects that the forming requirements of different RDF fuels can be met through the combination function of rapid mold replacement and self-adaptive pressure adjustment, and the RDF forming device is suitable for diversified production scenes such as a garbage treatment plant and a biomass power plant.

Description

Technical Field

[0001] The present invention mainly relates to the technical field of RDF fuel molding equipment, and in particular to an adaptive pressure regulation and mold rapid replacement system for RDF fuel molding equipment. Background Art

[0002] In the field of waste resource utilization, RDF fuel has become an important choice to replace traditional fossil energy due to its advantages such as stable calorific value, convenient transportation and high combustion efficiency. Its molding equipment, as the core device for converting loose raw materials into regular fuel, directly determines product quality and production efficiency.

[0003] In actual applications, traditional RDF forming equipment has the problem of low mold replacement efficiency. The mold and the body of existing equipment are mostly rigidly connected by bolts. When replacing, the fixed parts need to be disassembled one by one. The replacement of a single set of molds generally takes more than 1 hour, and the mold position needs to be manually calibrated during the replacement process. The molding accuracy is easily affected by installation deviations, which seriously interrupts the continuous production process and causes the effective production time per day to be shortened by nearly 20%. In addition, the pressure adjustment adaptability is extremely poor. The gap adjustment between the pressure roller and the mold relies on manual operation of the wrench to adjust the positioning screw, and the adjustment accuracy is time-consuming and labor-intensive.

[0004] When processing different raw materials such as wood and straw, fixed gaps can easily lead to two extreme problems: insufficient squeezing pressure on wood raw materials, resulting in loose and easily broken molded particles; excessive squeezing pressure on straw raw materials, resulting in excessive crushing of the raw materials and loss of calorific value. A single mold can only meet the molding requirements of a fixed aperture. If RDF fuels of different specifications are to be produced, the entire set of molds must be shut down and replaced, making it difficult to meet the market demand for diversified products.

[0005] It should be noted that the above content belongs to the technical knowledge scope of the inventor. Since the technical content in this field is vast and too complicated, the above content of this application does not necessarily constitute prior art. Summary of the Invention

[0006] 1. Technical problem to be solved by the invention: The present invention provides an adaptive pressure regulation and mold rapid replacement system for RDF fuel molding equipment, which is used to solve the technical problems existing in the above-mentioned background technology.

[0007] 2. Technical solution: To achieve the above-mentioned purpose, the technical solution provided by the present invention is: an adaptive pressure regulation and mold rapid replacement system for RDF fuel molding equipment, comprising a loading bin and a unloading ring channel, wherein a pressure roller module and a ring die mechanism are provided in the loading bin, and the lower end of the ring die mechanism is connected to the unloading ring channel, and the pressure roller module is located in the ring die mechanism, and the pressure roller module comprises a positioning bracket, a variable pitch bracket, a pressure roller group and a rotating motor, and the upper and lower ends of the pressure roller group are respectively connected to the positioning bracket and the variable pitch bracket, and the lower end of the variable pitch bracket passes through the unloading ring channel, and the driving end of the rotating motor is respectively connected to the positioning bracket and the variable pitch bracket, and the variable pitch bracket comprises a variable pitch disk, a turntable and a servo motor, and the ring die mechanism comprises a plurality of mutually nested disc molds, and an extension rod and a hydraulic cylinder are provided at the upper end of the disc mold, and a certain gap is provided between the plurality of disc molds.

[0008] Furthermore, the positioning bracket includes a positioning plate, and the positioning plate is provided with a swing arm 1 and a swing arm 2 which are rotatably connected to each other. One end of the swing arm 2 is provided with a flange sleeve, and the flange sleeve is fixedly connected to the upper end of the pressure roller group. The positioning plate and the swing arm 1 are fixedly connected by a locking screw.

[0009] Furthermore, the pitch disc and the turntable are respectively provided with a pitch groove and a positioning groove, a material-blocking brush is provided in the pitch groove, the turntable is sleeved on the pitch disc, and the driving end of the servo motor is connected to the bottom of the turntable.

[0010] Furthermore, the pressure roller group includes three pressure rollers, and a positioning rod is provided at the lower end of the pressure roller. The positioning rod passes through the pitch changing slot and is slidably connected to the positioning slot. The positioning rod is connected to the pitch changing slot through a locking nut.

[0011] Furthermore, a plurality of the disc molds are arranged close to the inner wall of the loading bin, and the upper ends of the disc molds are connected to the piston ends of the hydraulic cylinders through the extension rods.

[0012] Furthermore, the feeding bin includes a bin body, a feeding port and an upper cover, a plurality of the extension rods pass through the upper cover, a protective cover is provided on the outside of the rotating motor, and the upper end of the protective cover is fixedly connected to the upper cover.

[0013] Furthermore, an isolation cover is provided on the outside of the servo motor, the isolation cover is connected to the unloading ring, and the lower end of the turntable is rotatably connected to the isolation cover.

[0014] Furthermore, the material discharge ring includes a baffle ring and a material discharge tray, and the material discharge tray is provided with a docking groove corresponding to the tray mold.

[0015] 3.Beneficial effects: Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects: The hydraulic cylinder independently drives the plate mold to rise and fall, allowing molds of different specifications to be switched without disassembly, greatly shortening the replacement time and achieving efficient mold replacement; The servo motor precisely controls the roller spacing, which not only adapts to different diameters of discs but also adjusts the pressure on the same disc, improving the applicability of the equipment and achieving flexible pressure adjustment. The stability of the equipment under long-term high-load extrusion is ensured by the swing arm fixation of the positioning bracket, the locking nut of the variable pitch bracket, and the protective design of the protective cover and the isolation cover.

[0016] It should be noted that the structures not introduced in the present invention are the same as those in the prior art or can be implemented by using the prior art, and are not described in detail here because they do not involve the design points and improvement directions of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a cross-sectional view of the overall structure of the present invention; Figure 3 This is a schematic diagram of the feeding loop structure of the present invention; Figure 4 This is a schematic structural diagram of the pressure roller module of the present invention; Figure 5 This is an exploded schematic diagram of the pressure roller module structure of the present invention; Figure 6 It is a schematic diagram of the ring die structure of the present invention.

[0018] Reference numerals: 1. Feeding silo; 101. Bin body; 102. Feeding port; 103. Upper cover; 2. Feeding channel; 201. Baffle ring; 202. Feeding tray; 203. Docking slot; 3. Press roller assembly; 301. Positioning bracket; 3011. Positioning tray; 3012. Swing arm 1; 3013. Swing arm 2; 3014. Flange sleeve; 302. Pitch-changing bracket; 3021. Pitch-changing tray; 3022. Turntable; 3023. Servo motor; 3024. Pitch-changing slot; 3025. Positioning slot; 3026. Baffle brush; 303. Press roller assembly; 3031. Positioning rod; 304. Rotating motor; 305. Protective cover; 306. Isolation cover; 4. Ring die mechanism; 401. Disc die; 402. Extension rod; 403. Hydraulic cylinder. DETAILED DESCRIPTION

[0019] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0020] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "page", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0022] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," "fixed," "provided with," "provided on," etc. should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integral connection; they may refer to mechanical connection or electrical connection; they may refer to direct connection or indirect connection through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0023] Refer to the attached Figure 1-6 An adaptive pressure regulation and rapid die change system for RDF fuel molding equipment is designed around the core process of "raw material extrusion molding." From top to bottom, the system consists of a loading bin, a pressure roller module, a ring die mechanism, and a discharge ring. The coordination between the pressure roller module and the ring die mechanism is crucial for molding. The pressure roller module rotates and presses the raw material into the forming hole of the ring die, ultimately forming the RDF fuel in a fixed shape. "Adaptive pressure regulation" is achieved by adjusting the pressure roller spacing, and "rapid die change" is achieved by raising and lowering the ring die mechanism.

[0024] The feeding silo provides installation space for other core components and accommodates raw materials, including a silo body 101, a feeding port 102, and an upper cover 103. The upper cover 103 is fixedly connected to the top of the silo body 101 by bolts to ensure the closure of the silo. The feeding port 102 is welded or flanged to the side wall of the silo body 101. After the raw materials enter the silo body 101 through the feeding port 102, they accumulate in the gap between the ring die mechanism and the pressure roller module. The hydraulic cylinder 403 of the ring die mechanism is fixed to the upper surface of the upper cover 103, and the upper end of the rotating motor protective cover 305 of the pressure roller module is fixed to the lower surface of the upper cover 103 to ensure the stable installation of the core drive components.

[0025] The pressure roller module is the core for providing extrusion force and realizing pressure regulation. It consists of a positioning bracket 301, a variable pitch bracket 302, a pressure roller group 303, a rotating motor 304 and protective components. Its core function is to drive the pressure roller to rotate and extrude, and adjust the pressure roller spacing to adapt to the mold or adjust the pressure.

[0026] The positioning bracket 301 is based on the positioning plate 3011. The positioning plate 3011 is connected to the swing arm 1 3012 and the swing arm 2 3013 through a rotating shaft. The flange sleeve 3014 is welded to the end of the swing arm 2 3013 away from the swing arm 1. The flange sleeve 3014 is fixed to the upper end of the pressure roller group 303 by bolts. The rotation of the swing arm 1 3012 and the swing arm 2 3013 can fine-tune the initial angle of the pressure roller to ensure that the pressure roller is parallel to the inner wall of the ring die. After the adjustment is completed, it is fixed by the locking screw between the positioning plate 3011 and the swing arm 1 3012 to avoid angle deviation during extrusion.

[0027] The pitch-variable bracket 302 consists of a pitch-variable disc 3021, a turntable 3022, and a servo motor 3023. The turntable 3022 is mounted on the outside of the pitch-variable disc 3021 via a bearing sleeve. Three sets of pitch-variable slots 3024 are circumferentially defined on the pitch-variable disc 3021. Material-blocking brushes 3026 are located within these slots to prevent material from entering and impacting the drive. The turntable 3022 also has three corresponding sets of positioning slots 3025. The servo motor 3023 is secured within the isolation cover 306. The drive end is connected to the center of the bottom of the turntable 3022 via a coupling, driving the turntable 3022 to rotate relative to the pitch-variable disc 3021.

[0028] The positioning rod 3031 of the pressure roller assembly 303 passes through the pitch-variable slot 3024 of the pitch-variable disc and then slides into the positioning slot 3025 of the turntable. When the servo motor 3023 drives the turntable 3022 to rotate, the positioning slot 3025, via the positioning rod 3031, drives the pressure rollers along the pitch-variable slot 3024. Because the pitch-variable slot 3024 is a radially divergent structure, the pressure rollers move radially toward or away from the center synchronously, achieving synchronized adjustment of the spacing between the three pressure rollers. After adjustment, the locking nut on the positioning rod 3031 secures the pressure rollers to the pitch-variable slot 3024, preventing positional shifting during compression.

[0029] The pressure roller group 303 consists of three pressure rollers evenly distributed around the circumference. The upper end of the pressure roller is connected to the swing arm 2 3013 of the positioning bracket through the flange sleeve 3014, and the lower end is welded with a positioning rod 3031: The driving end of the rotating motor 304 passes through the positioning plate 3011 and is fixedly connected to the center of the pitch-changing plate 3021, driving the positioning bracket, the pitch-changing bracket and the pressure roller group to rotate around the central axis as a whole to achieve revolution; When the pressure roller revolves, its surface contacts the inner wall of the disk die 401 of the ring die mechanism. The friction of the raw material drives the pressure roller to rotate, thus realizing self-rotation. Through the compound motion of "revolution + self-rotation", the raw material in the bin is continuously pushed toward the forming hole on the inner wall of the disk die. The spacing between the three pressure rollers directly affects the gap with the inner wall of the disc mold: the smaller the spacing, the greater the extrusion force between the pressure rollers and the disc mold; the larger the spacing, the smaller the extrusion force, realizing the core logic of adaptive pressure regulation.

[0030] The protective cover 305 on the outside of the rotating motor 304 is fixed to the upper cover 103 to prevent raw materials from entering the interior of the motor. An isolation cover 306 is provided on the outside of the servo motor 3023 of the variable pitch bracket to prevent the raw materials from contaminating the servo motor 3023. The isolation cover 306 is connected to the rotation of the turntable 3022 to ensure stable rotation of the turntable.

[0031] The ring die mechanism 4 adapts to fuel particles of varying shapes and sizes by switching between different disc dies. It consists of multiple disc dies 401 with varying diameters and inner wall pores. The disc dies 401 are annular and nested within one another, with gaps between them. An extension rod 402 is welded to the top of each disc die 401, the top of which is fixedly connected to the piston of a hydraulic cylinder 403. During normal operation, only the innermost disc die 401 is in the working position. When a die needs to be changed, the corresponding hydraulic cylinder 403 is independently controlled. To use a larger-diameter disc die 401, the hydraulic cylinder for the inner, smaller-diameter disc die 401 extends, raising the smaller-diameter disc die 401 and exposing the outer, larger-diameter disc die 401. Conversely, the hydraulic cylinder for the larger-diameter disc die 401 extends, raising it and exposing the inner, smaller-diameter disc die 401. This independent actuation of the hydraulic cylinders 403 allows for rapid switching between different disc dies 401.

[0032] The unloading ring 2 consists of a baffle ring 201 and a unloading tray 202. The unloading tray 202 is provided with a docking groove 203. The RDF fuel particles extruded from the forming holes of the disc die 401 enter the unloading tray 202 through the docking groove 203, slide out of the equipment along the inclined disc surface, and complete the forming output.

[0033] The mold quick change process is as follows: 1. Stop feeding raw materials and suspend the operation of the rotating motor 304; 2. Control the hydraulic cylinder 403 of the corresponding die according to the target fuel size: when a larger diameter die is required, the hydraulic cylinder of the inner smaller die is extended, and the smaller die is lifted out of the working area; 3. After the lower end of the target plate mold is aligned with the docking groove 203 of the blanking plate, the hydraulic cylinder stops moving and the mold replacement is completed; 4. Start the equipment and the new disk module will enter the working state.

[0034] Pressure adjustment is based on the collaborative adaptation logic of "roller spacing" and "disc die adaptation" and is divided into the following two scenarios: Adaptation and adjustment after replacing the plate mold: After replacing a plate mold of a different diameter, start the servo motor 3023 of the pitch-variable bracket to drive the turntable 3022 to rotate, driving the positioning rod 3031 of the pressure roller to move along the pitch-variable groove 3024, and adjust the spacing between the pressure rollers to ensure a reasonable gap between the pressure rollers and the inner wall of the new plate mold; Pressure adjustment without changing the die: Under the same die, if the fuel density needs to be adjusted, the servo motor drives the roller spacing to decrease and the extrusion pressure to increase; if the density needs to be reduced, the roller spacing is increased and the extrusion pressure is reduced to adapt to different raw material characteristics.

[0035] In summary, this system uses hydraulic cylinders to independently drive the lifting and lowering of the disc mold, and different specifications of molds can be switched without disassembly, which greatly shortens the replacement time and realizes efficient mold replacement; the servo motor accurately controls the pressure roller spacing, which can not only adapt to disc molds of different diameters, but also adjust the pressure under the same disc mold, improving the applicability of the equipment and realizing flexible pressure adjustment; the swing arm fixation of the positioning bracket, the locking nut of the variable pitch bracket, the protective cover and the isolation cover are used to ensure the stability of the equipment under long-term high-load extrusion. Through the combination of "quick mold replacement" and "adaptive pressure adjustment", it can meet the molding needs of different RDF fuels and is suitable for diversified production scenarios such as waste treatment plants and biomass power plants.

[0036] The above-mentioned embodiments only express a certain implementation method of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the present invention. It should be pointed out that for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent of the present invention shall be based on the attached claims.

Claims

1. An adaptive pressure regulation and mold rapid replacement system for RDF fuel molding equipment, comprising a loading bin (1) and a unloading loop (2), characterized in that: The loading bin (1) is provided with a pressure roller module (3) and a ring die mechanism (4), the lower end of the ring die mechanism (4) is connected to the unloading ring channel (2), the pressure roller module (3) is located in the ring die mechanism (4), the pressure roller module (3) comprises a positioning bracket (301), a pitch-changing bracket (302), a pressure roller group (303) and a rotating motor (304), the upper and lower ends of the pressure roller group (303) are respectively connected to the positioning bracket (301) and the pitch-changing bracket (302), the pitch-changing bracket (302) is connected to the rotating motor (304), and the upper and lower ends of the pressure roller group (303) are respectively connected to the positioning bracket (301) and the pitch-changing bracket (302). ) has a lower end passing through the unloading ring channel (2), a driving end of the rotating motor (304) is respectively connected to the positioning bracket (301) and the pitch-changing bracket (302), the pitch-changing bracket (302) comprises a pitch-changing disc (3021), a rotating disc (3022) and a servo motor (3023), the ring die mechanism (4) comprises a plurality of disc dies (401) nested with each other, an extension rod (402) and a hydraulic cylinder (403) are provided at the upper end of the disc dies (401), and a certain gap is provided between the plurality of disc dies (401).

2. The adaptive pressure regulation and rapid mold replacement system for RDF fuel forming equipment according to claim 1, characterized in that: The positioning bracket (301) comprises a positioning plate (3011), and the positioning plate (3011) is provided with a swing arm 1 (3012) and a swing arm 2 (3013) which are rotatably connected to each other. One end of the swing arm 2 (3013) is provided with a flange sleeve (3014), and the flange sleeve (3014) is fixedly connected to the upper end of the pressure roller group (303). The positioning plate (3011) and the swing arm 1 (3012) are fixedly connected via a locking screw.

3. The adaptive pressure regulation and rapid mold replacement system for RDF fuel molding equipment according to claim 1 is characterized by: The pitch-changing disc (3021) and the rotating disc (3022) are respectively provided with a pitch-changing groove (3024) and a positioning groove (3025); a material-blocking brush (3026) is provided in the pitch-changing groove (3024); the rotating disc (3022) is sleeved on the pitch-changing disc (3021); and a driving end of the servo motor (3023) is connected to the bottom of the rotating disc (3022).

4. The adaptive pressure regulation and rapid mold replacement system for RDF fuel forming equipment according to claim 3 is characterized by: The pressure roller group (303) includes three pressure rollers. A positioning rod (3031) is provided at the lower end of each pressure roller. The positioning rod (3031) passes through the pitch-changing slot (3024) and is slidably connected to the positioning slot (3025). The positioning rod (3031) is connected to the pitch-changing slot (3024) via a locking nut.

5. The adaptive pressure regulation and rapid mold replacement system for RDF fuel molding equipment according to claim 1 is characterized by: A plurality of the plate molds (401) are arranged close to the inner wall of the loading bin (1), and the upper ends of the plate molds (401) are connected to the piston ends of the hydraulic cylinders (403) via the extension rods (402).

6. The adaptive pressure regulation and rapid mold replacement system for RDF fuel molding equipment according to claim 1 is characterized by: The loading bin (1) comprises a bin body (101), a feeding port (102) and an upper cover (103); a plurality of extension rods (402) pass through the upper cover (103); a protective cover (305) is provided on the outside of the rotating motor (304); and the upper end of the protective cover (305) is fixedly connected to the upper cover (103).

7. The adaptive pressure regulation and rapid mold replacement system for RDF fuel forming equipment according to claim 1 is characterized by: An isolation cover (306) is further provided on the outside of the servo motor (3023), the isolation cover (306) is connected to the unloading ring channel (2), and the lower end of the turntable (3022) is rotatably connected to the isolation cover (306).

8. The adaptive pressure regulation and rapid mold replacement system for RDF fuel molding equipment according to claim 1 is characterized by: The material discharge ring (2) comprises a blocking ring (201) and a material discharge tray (202), and the material discharge tray (202) is provided with a docking groove (203) corresponding to the tray mold (401).

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