CN115465636A - Low-resistance capacity-expansion dust-fall closed guide chute of belt conveyor - Google Patents
Low-resistance capacity-expansion dust-fall closed guide chute of belt conveyor Download PDFInfo
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- CN115465636A CN115465636A CN202110657991.0A CN202110657991A CN115465636A CN 115465636 A CN115465636 A CN 115465636A CN 202110657991 A CN202110657991 A CN 202110657991A CN 115465636 A CN115465636 A CN 115465636A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G47/00—Article or material-handling devices associated with conveyors; Methods employing such devices
- B65G47/02—Devices for feeding articles or materials to conveyors
- B65G47/16—Devices for feeding articles or materials to conveyors for feeding materials in bulk
- B65G47/18—Arrangements or applications of hoppers or chutes
- B65G47/19—Arrangements or applications of hoppers or chutes having means for controlling material flow, e.g. to prevent overloading
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G21/00—Supporting or protective framework or housings for endless load-carriers or traction elements of belt or chain conveyors
- B65G21/20—Means incorporated in, or attached to, framework or housings for guiding load-carriers, traction elements or loads supported on moving surfaces
- B65G21/2045—Mechanical means for guiding or retaining the load on the load-carrying surface
- B65G21/2063—Mechanical means for guiding or retaining the load on the load-carrying surface comprising elements not movable in the direction of load-transport
- B65G21/2072—Laterial guidance means
- B65G21/2081—Laterial guidance means for bulk material, e.g. skirts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G39/00—Rollers, e.g. drive rollers, or arrangements thereof incorporated in roller-ways or other types of mechanical conveyors
- B65G39/10—Arrangements of rollers
- B65G39/12—Arrangements of rollers mounted on framework
- B65G39/125—Arrangements of rollers mounted on framework for selectively adjusting troughing of the conveying belt
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Abstract
A low-resistance capacity-expanding dust-falling closed guide chute of a belt conveyor is used for a guide chute matched with a general belt conveyor. The material does not contact with the side plate of the guide chute, and the operation noise is low. The anti-overflow skirtboard is installed in the baffle box curb plate inboard, sets up wear-resisting slide between conveyer belt and the baffle box curb plate, has better sealed effect and less running resistance. Under the condition that the height of the guide chute is unchanged, the effective sectional area of the guide chute can be increased, so that the air flow rate in the guide chute is reduced, and the arrangement length of the guide chute is reduced. The baffle box curb plate does not have the side to support, when dismantling apron (13), anti-overflow skirtboard installation fastener (24), anti-overflow skirtboard installation clamp plate (25) and hexagon bolt (9) of curb plate supporting flange (8) department, back is shifted out bracing piece (27) to adjusting bolt (26) on supporting beam (6), can make baffle box curb plate (10) open to the outside, can dismantle countersunk head bolt (19) and then conveniently maintain or change wear-resisting slide (23).
Description
Technical Field
The invention belongs to a material guide groove matched with a general belt conveyor.
Background
In the field of bulk material conveying, a general belt conveyor is most widely applied. Wherein the material guide chute is one of the key equipments on the belt conveyor. The guide chute has the basic functions of guiding materials to fall into the middle of the conveying belt and keeping the materials to run along the conveying direction, so that the materials can stably reach the normal belt speed, and the materials are prevented from being scattered.
At present, the current latest standard of the general belt conveyor industry is 'design manual of belt conveyor (DTII (a))' of the main institute of design of hoisting and transporting machinery (2 nd edition) in beijing in 2013, and the matched standard diagram is 'special diagram-2011 of belt conveyor (DTII (a)' (hereinafter referred to as standard diagram for short)). Referring to the arrangement diagram of the material guiding chute in the standard drawing, fig. 1 shows a common structure form of the material guiding chute in a bell mouth form, and a structure diagram is shown in fig. 4. As a supplement to the DTII (A) belt conveyor, the arrangement diagram of the material guide chute in the handbook of typical design and selection of coal transporting parts of the belt conveyor in a thermal power plant is shown in figure 2, and the structure diagram is shown in figure 5.
For the material guide chute applied in fig. 4 and 5, due to the unstable material flow direction and angle in the discharging chute, when the material enters the material guide chute, the pile shape of the material is more dispersed, when the material runs in the material guide chute, the material can generate friction with the wear-resistant lining plate (12) of the material guide chute, and the running noise is large; the abrasion-resistant lining plate (12) and the anti-overflow apron plate (14) at the bottom of the guide chute side plate (10) are quickly abraded, the replacement period is short, and the maintenance cost is high.
The guide chute structure in fig. 4 and 5 is designed for the basic function of the guide chute, and the guide chute mainly functions to guide materials, and in recent years, the environmental protection requirement is improved, and the tightness and the dust falling effect of the guide chute are higher. The current common practice is that on the basis of fig. 4 and 5: the design of the anti-overflow apron board (14) is optimized, and the tightness of the contact part of the anti-overflow apron board (14) and the conveying belt (15) is improved to prevent dust from overflowing. Because the static sectional area inside the guide chute is limited, the air flow rate can not be effectively reduced, the dust settling time in the guide chute is longer, the arrangement length of the guide chute can only be prolonged to ensure the full settling of the dust, and the dust concentration at the discharge port of the guide chute is reduced. The result of this is: the anti-overflow skirtboard (14) can increase the abrasion of the conveyer belt (15); the friction resistance between the overflow-preventing apron board (14) of the material guide groove and the conveying belt (15) is increased, and the friction resistance between the material and the wear-resisting lining board (12) is increased; the operating noise influence range is increased.
For the material guiding chutes in fig. 4 and 5, each material guiding chute is installed by using the side support (11) through the section (1), and when the material guiding chutes, the trough carrier roller group (16) and the anti-overflow apron plate (14) are maintained, the operation space is limited due to the existence of the side support (11), which is very inconvenient.
For the material guiding chutes in fig. 4 and 5, the conveyor belt (15) between the adjacent trough-shaped carrier roller sets (16) may sag due to the weight of the conveyor belt and the material, so that the contact pressure between the overflow-preventing apron board (14) and the conveyor belt (15) is reduced, which is likely to cause material leakage or dust overflow, and the sealing effect is not ideal.
Disclosure of Invention
In order to overcome the defect that the maintenance period of vulnerable parts such as the wear-resistant lining plate and the anti-overflow apron plate of the conventional guide chute is short; the running resistance is large; the static cross section area in the material guide groove is smaller; the arrangement distance is long; the running noise is high; the maintenance operation is inconvenient; the sealing effect is not ideal. The invention provides a low-resistance capacity-expansion dust-fall closed guide chute, which comprises the following components in part by weight: the guide chute is not supported by a side edge, the guide chute is arranged on a supporting beam, when the cover plate, the anti-overflow apron plate mounting fastener, the anti-overflow apron plate mounting pressure plate and the hexagon bolt at the side plate supporting flange are disassembled, the adjusting bolt on the supporting beam is screwed out, and after the support rod is moved out, the side plate of the guide chute can be opened outwards, so that the wear-resistant sliding plate is convenient to maintain or replace; the wear-resistant sliding plate is made of high-density polyethylene, has light weight, high hardness and small friction coefficient with the conveying belt, and can effectively reduce the running resistance of the guide chute and reduce the running noise; the main material of the anti-overflow apron board is rubber, and the polyurethane is partially vulcanized when contacting with the adhesive tape, so that the friction coefficient between the anti-overflow apron board and the adhesive tape can be reduced, and the wear resistance is improved; the anti-overflow skirtboard is arranged on the inner side of the guide chute side plate and can be longitudinally bent along the inner side of the guide chute side plate, and the anti-overflow skirtboard is in airtight contact with the conveying belt by means of elasticity generated by bending of the anti-overflow skirtboard per se, so that a sealing effect is achieved.
The structure diagram of the passage section of the material guide chute is shown in fig. 8, and the lower carrier roller group adopts groove-shaped carrier rollers for reducing the length of the side rollers, so that the material guide chute has smaller running resistance on the premise of ensuring the tightness of the material guide chute. The specification parameters suitable for the low-resistance capacity-expansion dust-fall closed guide chute are shown in the table 1.
Technical scheme
The technical scheme adopted by the invention for solving the technical problems is as follows:
(1) according to the functional requirements on the guide chute, the material receiving section and the passing section are respectively designed: a material guide port is additionally arranged in the material receiving section to complete the stacking and flow guiding of the materials; the material in the passing section is in a natural state, and the side plate of the guide chute does not guide the material, so that the functions of sealing and dust falling are achieved; the side plates of the material receiving section and the material guide groove of the passing section are moved to the outer side of the conveying belt, the static section area in the material guide groove is increased under the condition that the height of the material guide groove is not increased, the air flow rate in the material guide groove can be reduced under the condition that the total air flow entering the material guide groove is unchanged, and the natural sedimentation of dust particles is facilitated.
(2) In the material receiving section of the guide chute, the angle of a side plate of a material receiving port and the height of the bottom edge of the wear-resisting plate are reasonably designed according to the static stacking angle and the dynamic stacking angle of the material, so that the material can be kept in a concentrated stacking shape when entering the guide chute, the material is prevented from directly impacting the anti-overflow apron plate, and the material is ensured to have better trafficability in the material receiving section of the guide chute; the material receiving port of the material receiving section of the material guide chute is provided with a temporary side support for temporarily fixing the material receiving port during installation or maintenance, and the material receiving port and the upstream discharging chute are detachably mounted and fixed so as to vacate a space, so that the material guide chute can be conveniently opened by the side plate of the material receiving section and maintained and replaced by the wear-resistant sliding plate.
(3) The baffle box adopts no side bearing structure through the section curb plate, and the baffle box curb plate can be opened to both sides respectively when installation and maintenance, conveniently dismantles and changes the slide. The supporting roller at the lower part of the guide chute can adopt a groove-shaped supporting roller with the length of the side roller reduced, so that the requirement for large bearing capacity can be met, and meanwhile, the guide chute can be ensured to have good tightness and small running resistance.
(4) The anti-overflow apron board is arranged on the inner side of the side plate of the guide chute, the bending generated by the anti-overflow apron board is in sealed contact with the conveying belt through the installation of the fastener, and the pressure generated by the anti-overflow apron board and the conveying belt after bending is less than 30-50N/m specified in the national standard (GB/T36698-2018 belt conveyor design calculation method). Can effectively reduce the frictional resistance between anti-overflow skirtboard and conveyer belt, anti-overflow skirtboard installation clamp plate can avoid simultaneously because of the not tight phenomenon of contact with the conveyer belt that the installation error of anti-overflow skirtboard caused, guarantee its and conveyer belt sealing effect within a definite time.
Advantageous effects
The beneficial effects of the invention are:
(1) the material passes through the baffle box and passes through the section when contactless with the baffle box curb plate, and the noise that no friction produced reduces by a wide margin equipment whole noise.
(2) The baffle box through the section need not to carry out the water conservancy diversion to the material, need not to arrange the wear-resisting welt that plays the water conservancy diversion effect, can effectively reduce the weight of baffle box.
(3) The baffle box side plate can be opened towards two sides, so that the wear-resistant sliding plate is convenient to replace.
(4) The side plates of the material guide groove are not provided with side supporting structures, so that the maintenance and the operation are more convenient.
(5) The pressure between the anti-overflow apron board and the conveying belt is small, so that the resistance of the guide chute is reduced, and the service life of the anti-overflow apron board can be prolonged. The pressure between the anti-overflow apron board and the conveying belt is uniform, the attachment is stable, and the sealing effect is good.
(6) Under the condition that a plurality of material receiving points are arranged on the belt conveyor, the material receiving section of the guide chute has better passing performance.
(7) Under the unchangeable condition of baffle box height H, can increase the effective sectional area of baffle box, and then reduce the air velocity in the baffle box, the length of arranging of reducible baffle box, the concrete analysis is as follows:
under the condition of not considering setting up the dust remover and other supplementary dust fall measures, the dust particle in the dust air current in the baffle box is according to the effect of gravity natural settling, and the air velocity in the baffle box is:
in the formula: v is the air flow velocity in the guide chute, m/s;
q is the total air flow into the chute, m 3 /s；
A is the static cross-sectional area in the material guide chute, m 2 。
The staying time of the airflow in the guide chute is as follows:
in the formula: t is the time required for the air flow to flow through the material guide chute, s;
l is the calculated length m of the subsidence area of the material guide groove;
the remaining symbols have the same meanings as above.
The natural settling time of dust particles in the dust airflow under the action of gravity is as follows:
in the formula: h is the net height m in the material guide groove;
g is the acceleration of gravity, m/s 2 。
In design, t > t should be guaranteed 1 From (formula 1), (formula 2) and (formula 3)
All symbols in the formula are as defined above.
Taking the conveyor belt width B =1200mm as an example, when the total air flow Q into the material guiding chute is a fixed value under the condition that the process of the conveying system is determined, the time t required for the air flow to flow through the material guiding chute is larger than the natural settling time of the dust particles in the dust air flow in the material guiding chute, and therefore, the time is also a fixed value. When the guide chute structure in DTII (A) design manual of belt conveyor is adopted, the static cross-sectional area A in the guide chute is =0.4m 2 The net height h in the guide chute is =0.46m; when the guide chute structure in the handbook for typical design and selection of coal transportation parts is adopted, the static cross-sectional area A =0.54m in the guide chute 2 The net height h in the guide chute is =0.64m; when the guide chute structure is adopted, the static cross-sectional area A =0.68m in the guide chute 2 And the net height h in the guide chute is =0.59m. From (equation 4) it can be calculated: when the guide chute is adopted, the arrangement length L can be shortened by 33 percent compared with the guide chute in a DTII (A) belt conveyor design manual and by 23 percent compared with the guide chute in a typical design selection manual of coal conveying parts.
(8) The running resistance of the guide chute can be effectively reduced, and the specific analysis is as follows:
according to the national standard (GB/T36698-2018 belt conveyorComputer design calculation method), the total running resistance of the material guide chute section comprises the following steps: frictional resistance F for sealing apron board of feeding section guide chute Sk Frictional resistance F of apron board seal of feeding section outer guide chute Sk1 Frictional resistance F between material conveyed by feeding section and side plate of material guide groove f And the frictional resistance F between the material conveyed outside the feeding section and the side plate of the material guide chute gl 。
Frictional resistance F for sealing apron board of feeding section guide chute Sk Comprises the following steps:
F Sk ＝2μ S ·p Sk ·l b (formula 5)
In the formula: mu.s S The sliding friction coefficient between the conveyer belt and the apron board sealing rubber is dimensionless;
p Sk is the effective unit length positive pressure between the conveyer belt and the apron board sealing rubber, N/m;
l b is the length m of the material guide groove of the feeding section.
In general, the sliding friction coefficient between the conveyor belt and the apron rubber is μ S =1; the positive pressure of the effective unit length between the conveyer belt and the apron board sealing rubber is p Sk ＝30N/m～50N/m。
Frictional resistance F for sealing apron board of feeding section outer guide chute Sk1 Comprises the following steps:
F Sk1 ＝2μ S ·p Sk ·l gl (formula 6)
In the formula: l gl Is the length m of the guide chute outside the feeding section.
The remaining symbols have the same meanings as above.
Frictional resistance F between material conveyed by feeding section and side plate of guide chute f Comprises the following steps:
length l of material guide groove of material feeding section b Comprises the following steps:
coefficient of active side pressure c Rank Comprises the following steps:
in the formula: i is m，N For the design of mass transport capacity, kg/s;
μ 1 the friction coefficient between the conveying belt and the conveyed material is dimensionless;
μ 2 the friction coefficient between the conveyed material and the side plate of the guide chute is dimensionless;
b Sch m is the clear width between the guide chutes;
l b，min is the minimum length of the material guide chute, m;
l M is the length, m, of the middle roller of the 3-roller carrier roller group;
c Schb the additive resistance coefficient caused by material disturbance in the feeding section is dimensionless;
c Rank the coefficient is the active side pressure coefficient and is dimensionless;
v is the belt speed of the conveyor, m/s;
v 0 the speed of the material fed onto the conveying belt in the conveying direction is m/s;
rho is the bulk density of the conveyed material, kg/m 3 ；
Lambda is a groove angle of the carrier roller set;
theta is the dynamic stacking angle of the conveyed materials.
The rest symbols have the same meanings as above.
For a belt conveyor of conventional design, it is advisable: c. C Schb ·c Rank =1, coefficient of friction between material and conveyor belt μ 1 = 0.5-0.7, and the friction coefficient between the material and the side plate of the material guide chute is mu 2 ＝0.5～0.7。
Frictional resistance F between material conveyed outside the feeding section and side plate of the material guide groove gl Comprises the following steps:
all symbols in the formula are as defined above.
Total running resistance F of guide chute in national standard (GB/T36698-2018 belt conveyor design and calculation method) ∑ Comprises the following steps:
F ∑ ＝F Sk +F Sk1 +F f +F gl (formula 11)
All symbols in the formula are as defined above.
When the guide chute structure is adopted, the edge of the wear-resisting plate at the bottom of the side plate of the receiving port is higher than the section of the material in the guide chute, and no frictional resistance exists between the material and the side plate of the guide chute along the running direction of the conveying belt, so that the total running resistance of the guide chute comprises the following steps: frictional resistance F for sealing apron board of feeding section guide chute Sk Frictional resistance F of apron board seal of feeding section outer guide chute Sk1 And the frictional resistance F between the side edge of the conveying belt and the wear-resistant sliding plate of the material guide chute hm . The anti-overflow apron board of the guide chute is attached to the conveying belt by the aid of rebound pressure generated by natural bending, and the accurate calculation of the frictional resistance of the apron board seal of the guide chute is difficult. In the national standard (GB/T36698-2018 design and calculation method for belt conveyor), when the frictional resistance of the guide chute apron seal is calculated, the pre-pressure mode is adopted for the anti-overflow apron. In fact, the frictional resistance of the guide chute apron plate seal is smaller than the calculated resistance in the national standard (GB/T36698-2018 belt conveyor design calculation method), so the frictional resistance of the guide chute apron plate seal can adopt the calculated method in the national standard (GB/T36698-2018 belt conveyor design calculation method), and the calculated result is safer.
Frictional resistance F between side edge of conveying belt and wear-resistant sliding plate of material guide chute hm Comprises the following steps:
F hm ＝2μ m l d (p Sk +K 1 q G g+K 2 q B g) (formula 12)
In the formula: mu.s m The coefficient of sliding friction between the conveying belt and the wear-resistant sliding plate is 0.2;
l d is the length of the guide chute, m, l d ＝l b +l gl ；
K 1 The gravity distribution coefficient of the material is obtained;
K 2 distributing coefficients for the gravity of the conveying belt;
q G the mass per unit length of the materials on the conveying belt is kg/m;
q B the mass per unit length of the conveyer belt is kg/m;
the rest symbols have the same meanings as above.
In the invention shown in fig. 6 and 8, the weight of the material is borne by the carrier roller group with shortened side rollers, and K can be selected 1 =0; the wear-resistant sliding plate only bears the weight of the edge of the conveying belt and can be taken K 2 ＝0.15。
Total running resistance F of guide chute ∑ Comprises the following steps:
F ∑ ＝F Sk +F Sk1 +F hm (formula 13)
All symbols in the formula are as defined above.
Taking the example that the belt width of the conveyer is B =1200mm, the conveyer is horizontally conveyed, the conveyed material is fed in a way of being vertical to the material guide chute, and the mass conveying capacity I m，N =223kg/s; conveyor belt speed v =2.5m/s; mass per unit length q of material on conveyor belt G =89kg/m; mass per unit length q of conveyor belt B =16.6kg/m; speed v of material in conveying direction on feeding conveyer belt 0 =0m/s; the conveying material is raw coal; bulk density of conveyed material rho =850kg/m 3 (ii) a The operation stacking angle theta of the conveyed materials is =20 degrees; idler set groove angle λ =35 °; length l of intermediate roller of carrier roller group M =0.465m; length l of feeding section of guide chute b =2m; external length l of feeding section of guide chute gl =14m; clear width b between guide chutes Sch =0.65m; taking the friction coefficient mu between the conveyer belt and the conveyed material 1 =0.5; taking the friction coefficient mu between the conveyed material and the side plate of the material guide chute 2 =0.5; the positive pressure of the effective unit length between the conveyer belt and the apron board sealing rubber is p Sk =30N/m; the gravity acceleration g =9.81m/s is taken 2 。
When the guide chute structure in a DTII (A) belt conveyor design manual and the guide chute structure in a coal transportation component typical design selection manual are adopted, the total running resistance F of the guide chute can be calculated by the formula 11 ∑ =1.735KN. When the material guide groove structure is adopted, the total running resistance F of the material guide groove can be calculated according to the formula 13 ∑ =1.308KN. Therefore, the invention can effectively reduce the running resistance of the guide chute.
Drawings
The invention is further illustrated by the following examples in conjunction with the drawings.
Fig. 1 is a diagram of a DTII (a) belt conveyor chute arrangement.
Fig. 2 is a layout diagram of a material guide chute in a handbook of typical design and selection of coal conveying parts of a belt conveyor in a thermal power plant.
Fig. 3 is a layout view of the guide chute according to the present invention.
Fig. 4 is a view showing the construction of a guide groove of a DTII (a) belt conveyor.
Fig. 5 is a structure diagram of a material guide chute in a handbook of typical design and selection of coal conveying parts of a belt conveyor in a thermal power plant.
Fig. 6 is a structural view of a receiving section of the guide chute according to the present invention.
Fig. 7 is a view from direction D of fig. 6.
Fig. 8 is a structural view of a pass through segment of the guide chute of the present invention.
Fig. 9 is a view from direction E of fig. 8.
Fig. 10 is a structural view of a baffle plate behind the material guide chute according to the present invention.
Fig. 11 is a structural view of a front curtain of a guide chute according to the present invention.
Fig. 12 is a structural view of a guide chute supporting beam of the present invention.
Fig. 13 is a schematic view of the installation of the overflow prevention skirt plate of the material guide chute of the present invention.
Fig. 14 is a view taken along direction H of fig. 13 (b).
In the drawing, 1, a guide chute passing section, 2, a guide chute rear baffle, 3, a guide chute front curtain, 4, a guide chute receiving section, 5, a pressing plate, 6, a supporting beam, 7, a discharging chute, 8, a side plate supporting flange, 9, a hexagon bolt, 10, a guide chute side plate, 11, a side support, 12, a wear-resistant lining plate, 13, a cover plate, 14, an anti-overflow apron plate, 15, a conveying belt, 16, a groove-shaped idler group, 17, a guide opening, 18, a guide opening side plate, 19, a countersunk head bolt, 20, a sealing flange, 21, a buffer idler group for shortening a side roller, 22, a side buffer roller, 23, a wear-resistant sliding plate, 24, an anti-overflow apron plate mounting fastener, 25, an anti-overflow apron plate mounting pressing plate, 26, an adjusting bolt, 27, a supporting rod, 28, a pin shaft, 29, a groove-shaped idler group for shortening a side roller, 30, a middle roller, 31, a side roller, 32, a buffer box, 33, an observation window, 34, a rubber sealing plate, 35, a rubber dust blocking curtain, 36, a supporting rod, a supporting seat 38, a handle, a 40, a bolt and a handle.
Parameters in fig. 6 and 8: the matching relationship of B, φ D, L1, L2 is shown in Table 1.
The standard idler groove angle λ referred to in fig. 6, 8 is: 30 degrees, 35 degrees, 45 degrees, 60 degrees and various nonstandard angles which are larger than 20 degrees and smaller than 70 degrees.
TABLE 1
Detailed Description
(1) In fig. 3, the material guide groove is composed of a material guide groove passing section (1), a material guide groove rear baffle (2), a material guide groove front curtain (3), a material guide groove receiving section (4), a pressing plate (5) and a supporting beam (6). The guide chute is arranged on the supporting beam (6) through the section (1), the guide chute rear baffle (2), the guide chute front curtain (3) and the guide chute receiving section (4), and the guide chute is connected with the guide chute receiving section (4) through the section (1), the guide chute rear baffle (2), the guide chute front curtain (3) by adopting the side plate supporting flange (8) and the hexagon bolt (9). The pressing plate (5) is arranged at the joint of the upper parts of all the sections of the material guide groove, so that a better sealing effect can be realized. The material receiving section (4) of the guide chute is independently designed and mainly plays a role in guiding the conveyed materials falling from the discharging chute (7). The material receiving section (4) of the guide chute is connected with the upstream discharging chute (7) by adopting a standard flange opening, and the size K value of the flange opening is detailed in a table 1.
(2) In the figure 6, the material guide port (17) is connected with the side support (11) through the hexagon bolts (9), the width between the wear-resistant lining plates (12) on the two sides of the bottom of the material guide port (17) and the height between the bottom edges of the wear-resistant lining plates (12) and the conveying belt (15) are optimally designed according to the static stacking angle of materials, the materials falling from the upstream can be ensured to be in a concentrated pile shape in the middle of the conveying belt (15), the material flow is prevented from directly impacting the anti-overflow apron plates (14) on the two sides of the bottom of the material guide port (17), and meanwhile, the falling materials can have good trafficability when being continuously conveyed on the conveying belt. The wear-resistant lining plate (12) is connected with the material guide port side plate (18) by a countersunk head bolt (19), so that the wear-resistant lining plate (12) is convenient to maintain and replace. A sealing flange (20) is reserved between the material guide port (17) and the cover plate (13), so that the cover plate (13) is convenient to install and seal. The lower part of the guide chute adopts a buffer carrier roller group (21) for shortening the side rollers, so that the impact generated by falling of materials can be effectively buffered, the impact range of the materials is ensured to be within the bearing range of the buffer carrier roller group, and the length L1 value of the side buffer rollers (22) is shown in table 1. A wear-resistant sliding plate (23) is arranged between the edge of the conveying belt (15) and the side plate (10) of the material guide groove. The edge of the conveying belt (15) is supported by the wear-resistant sliding plate (23), so that the conveying belt (15) can be effectively prevented from sagging, and the conveying belt (15) and the anti-overflow apron board (14) are ensured to have good contact sealing.
(3) In fig. 7, (a) is a sectional view of the chute receiving section (4) at the time of initial installation. When the discharging chute (7) is connected with the material guiding opening (17) for installation, the side support (11) can be detached to make room for maintaining the material receiving section (4) of the material guiding groove, and at the moment, the gravity of the material guiding opening (17) is loaded on the discharging chute (7) at the upstream for bearing.
(4) Fig. 7 (b) is a schematic view showing the assembly and disassembly of the chute side wear-resistant slide plate (23) during maintenance and replacement. The wear-resistant sliding plate (23) is connected with the side plate (10) of the material guide groove by a countersunk bolt (19), and the side plate supporting flange (8) is hinged with the supporting rod (27). When the side supports (11) and the cover plate (13) are removed, the anti-overflow apron board mounting fasteners (24), the anti-overflow apron board mounting pressing plates (25) and the hexagon bolts (9) at the side plate supporting flanges (8) are removed, the adjusting bolts (26) on the supporting cross beams (6) are screwed out, and after the support rods (27) are moved out, the guide chute side plates (10) can be opened towards the outer side, so that the countersunk head bolts (19) can be removed to maintain or replace the wear-resistant sliding plates (23). The pin shaft (28) can also be disassembled to take down the whole guide chute side plate (10) from the supporting cross beam (6) for maintenance or replacement.
(5) In fig. 8, the cover plate (13) is made by bending a steel plate with the thickness not larger than 4mm, rib plates are welded at two ends, and the whole weight is light and the rigidity is good. The lower part of the guide chute adopts a groove-shaped carrier roller group (29) for shortening side rollers, the section of the material on the conveying belt (15) is designed according to the stacking angle, the covering range of the material is ensured to be within the bearing range of the groove-shaped carrier roller group, and the length L1 value of the side roller (31) is shown in table 1. Wear-resisting slide plates (23) are arranged between the edges of the conveying belts (15) and the guide chute side plates (10), the edges of the conveying belts (15) are supported by the wear-resisting slide plates (23), so that the conveying belts (15) can be effectively prevented from sagging, and good contact sealing between the conveying belts (15) and the anti-overflow apron plates (14) is ensured.
(6) In FIG. 9, (a) is a sectional view showing the installation of the chute passing section (1), and (b) is a schematic view showing the assembly and disassembly of the chute side wear slide plate (23) during maintenance and replacement. In the figure (b), a wear-resistant sliding plate (23) is connected with a guide chute side plate (10) by adopting a countersunk bolt (19), and a side plate supporting flange (8) is hinged with a support rod (27). When the cover plate (13) is removed, the anti-overflow apron plate mounting fastener (24), the anti-overflow apron plate mounting pressing plate (25) and the hexagon bolts (9) at the side plate supporting flanges (8) are removed, the adjusting bolts (26) on the supporting cross beam (6) are screwed out, and after the supporting rod (27) is moved out, the guide chute side plate (10) can be opened towards the outside, so that the countersunk bolts (19) can be removed to further maintain or replace the wear-resistant sliding plate (23). The pin shaft (28) can also be disassembled to integrally take down the side plate (10) of the guide chute from the supporting beam (6) for maintenance or replacement.
(7) In fig. 10, the baffle (2) at the rear of the material guide chute is provided with a buffer box (32) to prevent the phenomenon of powder spraying caused by large airflow pressure at the tail of the material receiving section (4) of the material guide chute. The periphery of the buffer box (32) and the conveyer belt (15) are sealed by a rubber sealing plate (34). An observation window (33) is arranged at the tail part of the buffer tank (32) and can be used for observation or emergency disposal. The buffer box (32) is connected with the side plate supporting flange (8) by adopting a hexagon bolt (9), so that the disassembly, the assembly and the maintenance are convenient.
(8) In fig. 11, the baffle box front curtain (3) is composed of a side plate supporting flange (8), a rubber dust-blocking curtain (35) and a baffle (36) which are connected by a hexagon bolt (9), and is convenient to disassemble, assemble and maintain. The bottom edge of the rubber dust-blocking curtain (35) is cut according to the section profile of the conveyed material, so that the open area is reduced to the maximum extent.
(9) In fig. 12, the support beam (6) is provided with an adjusting bolt (26), a pin (28), and a strut support (37). Each supporting beam (6) is used for supporting a side plate supporting flange (8) of each section of adjacent guide chute. The pin shaft (28) is shared by two adjacent side plate supporting flanges (8) and plays a role in positioning the side plate supporting flanges (8) and rotatably supporting the side plates (10) of the dismounting and mounting material guide chute. Two pairs of adjusting bolts (26) and corresponding brace rod supports (37) are arranged on each supporting cross beam (6), the adjusting bolts (26) on each side of the supporting cross beam (6) can be independently operated, the end parts of the brace rods (27) are moved out of the brace rod supports (37), each section of guide chute side plate (10) can be independently opened outwards, and the wear-resistant sliding plate (23) of the wear-resistant sliding plate is convenient to maintain or replace.
And (c) in fig. 13, (a) is an exploded view of the spill-guiding skirt plate (12) before installation, and (b) is a position view of the spill-guiding skirt plate (12) after installation.
The anti-overflow skirt board installation pressing plate (25) and the anti-overflow skirt board (14) are installed on the inner side of the guide chute side plate (10) by adopting a fastener handle (39) and a fastener bolt (40). The anti-overflow skirtboard (14) can be longitudinally bent along the inner side of the guide chute side plate (10), and the lower edge of the anti-overflow skirtboard (14) can be well attached to the conveying belt (15) due to the elasticity generated by bending of the anti-overflow skirtboard, so that a good sealing effect is achieved. The anti-overflow skirtboard (14) is provided with corresponding mounting holes according to the specification and the mounting position of a fastener bolt (40) in the anti-overflow skirtboard mounting fastener (24), and is integrally manufactured in a full length mode according to the total arrangement length of the guide chute. The anti-overflow apron board mounting pressing plate (25) is manufactured in a segmented mode according to the length of the guide chute side plate (10) which is correspondingly mounted, and mounting is convenient. The anti-overflow skirtboard mounting pressing plate (25) is provided with the pressing strips (38) at intervals, so that the phenomenon that the edge of the anti-overflow skirtboard (14) contacting with the conveying belt (15) is warped due to mounting errors or material impact of the anti-overflow skirtboard (14) can be prevented, and the anti-overflow skirtboard (14) can be effectively protected from being well attached to the conveying belt (15).
After the anti-overflow apron board (14) is installed, the upper edge extends to a position higher than the installation surfaces of the cover board (13) and the guide chute side board (10), and the connection position of the guide chute side board supporting flange (8) can be well sealed. The main material of anti-overflow skirtboard (14) is rubber, and the surface vulcanization polyurethane that bottom and conveyer belt (15) contacted is less to the coefficient of friction of conveyer belt (15), improves the wearability of anti-overflow skirtboard (14) simultaneously, prolongs its life.
Claims (2)
1. The airtight baffle box of belt conveyor low resistance dilatation dust fall, the baffle box curb plate is installed in the conveyer belt outside, and anti-overflow skirtboard is installed in the baffle box curb plate inboard, and the baffle box curb plate can be opened characterized by to both sides when maintaining to change wear-resisting slide: when the cover plate (13) is removed, the anti-overflow apron plate mounting fastener (24), the anti-overflow apron plate mounting pressing plate (25) and the hexagon bolts (9) at the side plate supporting flanges (8) are removed, the adjusting bolts (26) on the supporting cross beam (6) are screwed out, and after the supporting rod (27) is moved out, the guide chute side plate (10) can be opened outwards, so that the countersunk bolts (19) can be removed to maintain or replace the wear-resistant sliding plate (23); the pin shaft (28) can also be disassembled to take down the whole guide chute side plate (10) from the supporting cross beam (6) for maintenance or replacement.
2. The belt conveyor low-resistance capacity-expansion dust-fall closed guide chute of claim 1, which is characterized in that: a guide chute side plate (10) is arranged on the supporting beam (6) through a side plate supporting flange (8); the supporting beam (6) is provided with an adjusting bolt (26), a pin shaft (28) and a stay bar support (37); each supporting beam (6) is used for supporting a side plate supporting flange (8) of each section of adjacent guide chute; the pin shaft (28) is shared by two adjacent side plate supporting flanges (8) and plays a role in positioning the side plate supporting flanges (8) and rotatably supporting the side plates (10) of the dismounting and mounting guide chute; two pairs of adjusting bolts (26) and corresponding brace supports (37) are arranged on each supporting cross beam (6), the adjusting bolts (26) on each side of the supporting cross beam (6) can be independently operated, the end parts of the braces (27) are moved out of the brace supports (37), and each section of guide chute side plate (10) can be independently opened outwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110657991.0A CN115465636A (en) | 2021-06-11 | 2021-06-11 | Low-resistance capacity-expansion dust-fall closed guide chute of belt conveyor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110657991.0A CN115465636A (en) | 2021-06-11 | 2021-06-11 | Low-resistance capacity-expansion dust-fall closed guide chute of belt conveyor |
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| Publication Number | Publication Date |
|---|---|
| CN115465636A true CN115465636A (en) | 2022-12-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110657991.0A Pending CN115465636A (en) | 2021-06-11 | 2021-06-11 | Low-resistance capacity-expansion dust-fall closed guide chute of belt conveyor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117699519A (en) * | 2024-01-29 | 2024-03-15 | 南京飞达机械有限公司 | Totally-enclosed environment-friendly guide chute |
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2021
- 2021-06-11 CN CN202110657991.0A patent/CN115465636A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117699519A (en) * | 2024-01-29 | 2024-03-15 | 南京飞达机械有限公司 | Totally-enclosed environment-friendly guide chute |
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