Anti-blocking biomass raw material screw conveying device

Abstract

The utility model discloses a kind of anti-blocking biomass raw material screw conveyors, it includes: support shell, support shell is the horizontal structure of top open, the bottom of one end of support shell is set to blanking gap;Material box, material box is placed in the inboard of support shell, the bottom of one end of material box and corresponding blanking gap is set to discharge port, the top of the other end of material box is set to inlet, and both ends of material box are provided with avoiding hole;Elastic member, elastic member has multiple groups and is fixed between material box and support shell, material box can float in support shell based on elastic member;Combined screw shaft, combined screw shaft is placed in the inside of material box and the both ends shaft portion of combined screw shaft passes through avoiding hole and is rotatably connected with support shell, the aperture size of avoiding hole is greater than the shaft diameter size of shaft portion, the utility model structure is simple, avoid biomass raw material conveying process in plugging, dismounting and maintaining conveniently.

Description

Technical Field

[0001] This utility model belongs to the field of biomass raw material conveying technology, specifically relating to a spiral conveying device for preventing blockage of biomass raw materials. Background Technology

[0002] Biomass gasification is the process of producing combustible gas from biomass raw materials such as wood chips, bamboo, rice husks, and fruit shells through high-temperature pyrolysis and reduction reactions. The biomass raw materials are conveyed into the gasifier via a conveying device, where they undergo oxidation, reduction, pyrolysis, and drying to produce clean and environmentally friendly biomass fuel gas. After being lifted to the top of the gasifier, the biomass raw materials must be evenly distributed into the gasifier by a material distribution device to prevent localized accumulation and bridging, which could affect the normal operation of the gasifier. Currently, the commonly used material distribution device is a screw conveyor, but it generally has the following problems:

[0003] (1) Biomass feedstock or impurities clog the feed screw. Commonly used biomass feedstocks in gasification projects, such as wood chips and waste wood, still contain some materials whose dimensions exceed standard requirements after primary crushing. When a conventional feed screw conveys this material, the oversized material is compressed and clogs the space between the screw and the pipe wall, preventing the screw from rotating. Additionally, the feedstock may contain hard solid impurities such as metals and stones, which can jam the screw during feeding and cause deformation and damage. When the screw feeder is clogged by feedstock or impurities, the screw cannot rotate normally, requiring shutdown for maintenance, leading to production interruptions and economic losses for the user.

[0004] (2) The screw mechanism of the screw feeder needs to be replaced as a whole after it is damaged. The screw of a conventional screw feeder is a whole structure, welded to the drive shaft. When the screw feeder is damaged due to blockage by hard impurities in the raw material and needs to be repaired, the entire screw needs to be replaced, which is a lot of work, a long downtime, and has a significant impact on normal production.

[0005] Therefore, how to provide a biomass feedstock screw conveyor that avoids material blockage and is easy to maintain is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0006] In view of this, the present invention provides a screw conveyor device for preventing blockage of biomass raw materials, which can avoid material blockage during biomass conveying process, facilitate subsequent maintenance and replacement, and reduce downtime.

[0007] To achieve the above objectives, this utility model adopts the following technical solution: a clog-resistant biomass raw material screw conveyor device, comprising:

[0008] A support housing, which is a horizontal structure with an open top, and a material feeding notch is provided at the bottom of one end of the support housing;

[0009] The material box is horizontally placed inside the supporting shell. A discharge port is provided at the bottom of one end of the material box and corresponding to the material feeding notch. A feed port is provided at the top of the other end of the material box. A clearance hole is provided at both ends of the material box.

[0010] An elastic element, wherein multiple sets of the elastic element are fixedly located between the material box and the support housing, and the material box is able to float on the support housing based on the elastic element;

[0011] A combined spiral shaft is placed inside the material box, and the two ends of the combined spiral shaft pass through the clearance holes and are rotatably connected to the support housing. The diameter of the clearance holes is larger than the diameter of the shaft.

[0012] The beneficial effects of this utility model are: the material box floats inside the support shell through the elastic element. The purpose of this setting is that when the combined screw shaft is blocked, the material box can move slightly along the direction of force, so that the feeding screw can continue to rotate and transport materials, reducing the system shutdown caused by hard impurities blocking the screw, thereby ensuring production efficiency.

[0013] Preferably, it also includes a fixed support, which is fixed to the bottom outer side of the support housing and is used to connect to the top of the gasifier.

[0014] The resulting technical effect is that the supporting shell can be connected to the gasifier through the fixed support, which facilitates the subsequent feeding process of the gasifier.

[0015] Preferably, the outline dimension of the feeding notch is larger than the outer outline dimension of the discharge port, and the bottom end of the discharge port extends to the lower side of the support housing.

[0016] The resulting technical effect is that the material discharge notch is relatively large, leaving room for a small displacement of the discharge port. The bottom of the discharge port extends to the lower side of the support shell to prevent the material from falling into the gap between the material box and the support shell, thus avoiding affecting the subsequent floating effect of the material box.

[0017] Preferably, one end of the support housing is detachably connected to a maintenance end cover, the maintenance end cover has a through hole in the middle, a bearing is installed in the through hole, and the shaft of the combined spiral shaft is connected to the bearing.

[0018] The resulting technical effect is that the maintenance end cap at the end of the supporting shell is designed to facilitate the disassembly and maintenance of internal components.

[0019] Preferably, a first material box inspection cover is detachably connected to the top of the material box, an inspection port is provided at one end of the material box near the discharge port, a second material box inspection cover is detachably connected to the inspection port, and the clearance hole is provided on the second material box inspection cover.

[0020] The resulting technical effect is that the inspection cover of the hopper facilitates the maintenance of the internal combined spiral shaft.

[0021] Preferably, the elastic element is a spring or a rubber block.

[0022] The resulting technical effect is that, in practical implementation, it is not limited to springs and rubber blocks, but can also be other flexible components.

[0023] Preferably, the combined spiral shaft includes multiple linearly spliced ​​shaft segments. Each shaft segment at both ends of the combined spiral shaft extends outward with a stepped shaft. The stepped shaft is the shaft portion of the combined spiral shaft and passes through the clearance hole and is rotatably connected to the support housing.

[0024] The resulting technical benefits are: the modular screw shaft is formed by linearly splicing several shaft sections, which facilitates subsequent disassembly and maintenance, and also allows for the adaptation to lengthening the screw shaft as needed. When the screw shaft is damaged and needs to be repaired or replaced, the corresponding damaged shaft section can be quickly replaced without replacing the entire shaft, thus reducing the workload and time of the feeding device's maintenance and reducing the economic losses from system downtime.

[0025] Preferably, the stepped shaft includes a first shaft segment and a second shaft segment. The diameter of the first shaft segment is smaller than that of the second shaft segment. The first shaft segment is rotatably connected to the support housing and can be transmitted to an external rotating power device. The first shaft segment is located inside the clearance hole. The shoulder between the first shaft segment and the second shaft segment abuts against the inner wall of the end of the material box. The diameter of the first shaft segment is 5mm to 10mm smaller than the diameter of the clearance hole, and the diameter of the second shaft segment is 5mm to 10mm larger than the diameter of the clearance hole.

[0026] The resulting technical effect is that the stepped shaft is conducive to matching the material box clearance hole. In specific implementation, the first shaft section can move up, down, left and right within the clearance hole to meet the requirements for material box displacement. The shaft shoulder between the first shaft section and the second shaft section can also abut against the inner walls of both ends of the material box to prevent material leakage.

[0027] Preferably, the shaft segment includes a drive shaft and a helical blade. The two ends of the drive shaft are respectively provided with a polygonal drive groove and a polygonal drive column. The polygonal drive groove is inserted into the polygonal drive column of the adjacent shaft segment for transmission. The outer edge of the helical blade is provided with material breaking saw teeth. There is a material passing gap between the outer edge of the helical blade and the inner wall of the material box.

[0028] The resulting technical effect is that the outer edge of the spiral blade is equipped with a material-breaking serration. When flexible materials clog the spiral, the serration structure can cut the flexible impurities such as biomass raw materials or waste fibers stuck between the spiral and the inner wall of the hopper into small pieces, so that the spiral can run continuously and stably, reducing the failure and shutdown of the feeding spiral caused by flexible impurities due to entanglement and compression. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of an anti-clogging biomass raw material screw conveyor according to the present invention;

[0030] Figure 2 This is a schematic diagram of the supporting shell structure of an anti-clogging biomass raw material screw conveyor according to the present invention;

[0031] Figure 3 This is a schematic diagram of the material box structure of an anti-clogging biomass raw material screw conveyor according to the present invention;

[0032] Figure 4 This is a structural diagram of a combined screw shaft of an anti-clogging biomass raw material screw conveyor according to the present invention;

[0033] Figure 5 This is a schematic diagram of the combined screw shaft splicing of an anti-clogging biomass raw material screw conveyor according to the present invention;

[0034] Figure 6 This is a cross-sectional view of an anti-clogging biomass raw material screw conveyor according to the present invention;

[0035] Figure 7 This is an axial cross-sectional view of an anti-clogging biomass raw material screw conveyor according to the present invention;

[0036] Figure 8 This is a radial cross-sectional view of an anti-clogging biomass raw material screw conveyor according to the present invention;

[0037] Figure 9 This is a detailed drawing of the stepped shaft assembly of an anti-clogging biomass raw material screw conveyor according to the present invention.

[0038] 1 Support housing, 11 Feeding notch, 12 Inspection end cover, 13 Bearing, 2 Material box, 21 Discharge port, 22 Feed inlet, 23 Alternating hole, 24 First material box inspection cover, 25 Second material box inspection cover, 3 Elastic element, 4 Combined spiral shaft, 41 Shaft section, 411 Transmission shaft, 412 Spiral blade, 413 Polygonal transmission groove, 414 Polygonal transmission column, 415 Breaking saw teeth, 42 Stepped shaft, 421 First shaft section, 422 Second shaft section, 5 Fixed support. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] See appendix to this utility model Figures 1 to 9 According to an embodiment of the present invention, a clog-resistant biomass raw material screw conveyor device includes:

[0041] Support shell 1, which is a horizontal structure with an open top, and a material feeding notch 11 is provided at the bottom of one end of the support shell 1;

[0042] Material box 2 has a similar shape to the support shell, both being rectangular structures. It is placed horizontally inside the support shell 1. There is a necessary clearance between the periphery of material box 2 and the support shell 1. A discharge port 21 is provided at the bottom of one end of material box 2 and corresponding to the material feeding notch 11. An inverted conical inlet 22 is provided at the top of the other end of material box 2. Alternating holes 23 are provided at both ends of material box 2.

[0043] Elastic element 3, multiple sets of elastic element 3 are fixedly located between material box 2 and support shell 1, material box 2 can float on support shell 1 based on elastic element 3;

[0044] The combined spiral shaft 4 is placed inside the material box 2, and the two ends of the combined spiral shaft pass through the avoidance hole 23 and are rotatably connected to the support shell 1. The diameter of the avoidance hole 23 is larger than the diameter of the shaft, providing space avoidance conditions for the material box to float.

[0045] The suspended feed box 2 is used. When hard impurities such as stones and scrap metal in the raw materials block the screw shaft, the feed box can be slightly displaced along the direction of force, so that the screw can continue to rotate and transport materials, reducing the system shutdown caused by hard impurities blocking the screw.

[0046] In other embodiments, a fixed support 5 is also included, which is fixed to the bottom outer side of the support housing 1 and is used to connect to the top of the gasifier.

[0047] In other embodiments, the outline dimension of the feeding notch 11 is larger than the outer outline dimension of the discharge port 21 to ensure that the material box does not interfere with the feeding notch 11 when it shakes. The bottom end of the discharge port 21 extends to the lower side of the support housing 1 to avoid material accumulation between the material box 2 and the support housing 1.

[0048] In some other specific embodiments, a maintenance end cover 12 is detachably connected to one end of the support housing 1. The maintenance end cover 12 has a through hole in the middle, and a bearing 13 is installed in the through hole. The shaft of the combined spiral shaft 4 is connected to the bearing 13. The maintenance end cover facilitates subsequent maintenance by workers.

[0049] In some other embodiments, a first material box inspection cover 24 is detachably connected to the top of the material box 2, an inspection port is provided at one end of the material box 2 near the discharge port 21, and a second material box inspection cover 25 is detachably connected to the inspection port. A clearance hole 23 is provided on the second material box inspection cover 25, and the material box inspection cover is easy to disassemble for maintenance of the internal combined spiral shaft.

[0050] In practical use, the elastic element 3 is a spring, which can achieve a small-amplitude elastic displacement.

[0051] In some other specific embodiments, the combined spiral shaft 4 includes multiple linearly spliced ​​shaft segments 41. The shaft segments 41 at both ends of the combined spiral shaft 4 are provided with stepped shafts 42 extending outward. The stepped shafts 42 are the shaft parts of the combined spiral shaft 4. The stepped shafts 42 pass through the clearance holes 23 and are rotatably connected to the support housing 1. The stepped shafts at the ends are provided for the purpose of supporting the rotation in the future, and also to cooperate with the clearance holes of the material box to achieve floating sealing.

[0052] Specifically, the stepped shaft 42 includes a first shaft section 421 and a second shaft section 422. The shaft diameter of the first shaft section 421 is smaller than that of the second shaft section 422. The first shaft section 421 is rotatably connected to the support housing 1 and can be transmitted to an external rotating power device. The first shaft section 421 is located inside the clearance hole 23. The shoulder between the first shaft section 421 and the second shaft section 422 abuts against the inner wall of the end of the material box 2. The shaft diameter of the first shaft section 421 is 5mm to 10mm smaller than the diameter of the clearance hole 23, and the shaft diameter of the second shaft section 422 is 5mm to 10mm larger than the diameter of the clearance hole 23. The shoulder of the stepped shaft abuts against the outer edge of the clearance hole at the end of the material box to prevent material leakage and will not affect the displacement of the material box relative to the spiral shaft.

[0053] In other embodiments, the shaft segment 41 includes a drive shaft 411 and a spiral blade 412. The two ends of the drive shaft 411 are respectively provided with a polygonal drive groove 413 and a polygonal drive column 414. The polygonal drive groove 413 is inserted into the polygonal drive column 414 of the adjacent shaft segment for transmission. The outer edge of the spiral blade 412 is provided with material-breaking serrations 415, and there is a material passage gap between the outer edge of the spiral blade 412 and the inner wall of the material box 2. When flexible material clogs the spiral, the serrated edge structure can cut the flexible impurities such as biomass raw materials or waste fibers stuck between the spiral and the inner wall of the material box into small pieces, allowing the spiral to operate continuously and stably, reducing spiral shaft failures and shutdowns caused by flexible impurities entanglement and compression.

[0054] The drive shaft 411, polygonal drive groove 413, and polygonal drive column 414 are arranged coaxially. This ensures the concentricity of the combined helical shaft so that it can rotate flexibly.

[0055] The apparatus and methods disclosed in the embodiments are described simply because they correspond to the methods disclosed in the embodiments. For relevant details, please refer to the method section.

[0056] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. 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 the present invention. Therefore, the present invention 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 clog-resistant screw conveyor for biomass raw materials, characterized in that, include: Support shell (1), the support shell (1) is a horizontal structure with an open top, and a material feeding notch (11) is provided at the bottom of one end of the support shell (1); Material box (2), the material box (2) is placed inside the support shell (1), the bottom of one end of the material box (2) is provided with a discharge port (21) corresponding to the material discharge notch (11), the top of the other end of the material box (2) is provided with a feed port (22), and the two ends of the material box (2) are provided with clearance holes (23); Elastic element (3), there are multiple sets of elastic element (3) and they are fixedly located between the material box (2) and the support shell (1). The material box (2) can float on the support shell (1) based on the elastic element (3). A combined spiral shaft (4) is placed inside the material box (2), and the two ends of the combined spiral shaft pass through the clearance hole (23) and are rotatably connected to the support housing (1). The diameter of the clearance hole (23) is larger than the diameter of the shaft.

2. The anti-clogging biomass raw material screw conveyor device according to claim 1, characterized in that, It also includes a fixed support (5), which is fixed to the bottom of the outer side of the support housing (1) and is used to connect to the top of the gasifier.

3. The anti-clogging biomass raw material screw conveyor device according to claim 1, characterized in that, The outline dimension of the feeding notch (11) is larger than the outer outline dimension of the discharge port (21), and the bottom end of the discharge port (21) extends to the lower side of the support housing (1).

4. The anti-clogging biomass raw material screw conveyor device according to claim 1, characterized in that, One end of the support housing (1) is detachably connected to a maintenance end cover (12). The maintenance end cover (12) has a through hole in the middle, and a bearing (13) is installed in the through hole. The shaft of the combined spiral shaft (4) is connected to the bearing (13).

5. The anti-clogging biomass raw material screw conveyor device according to claim 1, characterized in that, The top of the material box (2) is detachably connected to a first material box inspection cover (24). An inspection port is provided at one end of the material box (2) near the discharge port (21). The inspection port is detachably connected to a second material box inspection cover (25). The clearance hole (23) is provided on the second material box inspection cover (25).

6. The anti-clogging biomass raw material screw conveyor device according to claim 1, characterized in that, The elastic element (3) is a spring or a rubber block.

7. A clog-resistant biomass feedstock screw conveyor according to any one of claims 1-6, characterized in that, The combined spiral shaft (4) includes multiple linearly spliced ​​shaft segments (41). The shaft segments (41) at both ends of the combined spiral shaft (4) are provided with stepped shafts (42) extending outward. The stepped shafts (42) are the shaft parts of the combined spiral shaft (4). The stepped shafts (42) pass through the clearance hole (23) and are rotatably connected to the support housing (1).

8. The anti-clogging biomass raw material screw conveyor device according to claim 7, characterized in that, The stepped shaft (42) includes a first shaft segment (421) and a second shaft segment (422). The shaft diameter of the first shaft segment (421) is smaller than that of the second shaft segment (422). The first shaft segment (421) is rotatably connected to the support housing (1) and can be transmitted to an external rotating power device. The first shaft segment (421) is located in the clearance hole (23). The shoulder between the first shaft segment (421) and the second shaft segment (422) abuts against the inner wall of the end of the material box (2). The shaft diameter of the first shaft segment (421) is 5mm to 10mm smaller than that of the clearance hole (23), and the shaft diameter of the second shaft segment (422) is 5mm to 10mm larger than that of the clearance hole (23).

9. The anti-clogging biomass raw material screw conveyor device according to claim 7, characterized in that, The shaft segment (41) includes a drive shaft (411) and a spiral blade (412). The two ends of the drive shaft (411) are respectively provided with a polygonal drive groove (413) and a polygonal drive column (414). The polygonal drive groove (413) is inserted into the polygonal drive column (414) of the adjacent shaft segment for transmission. The outer edge of the spiral blade (412) is provided with a breaking saw tooth (415). There is a material passage gap between the outer edge of the spiral blade (412) and the inner wall of the material box (2).

Images