CN213737341U - Anti-blocking type curve coal breakage structure - Google Patents
Anti-blocking type curve coal breakage structure Download PDFInfo
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- CN213737341U CN213737341U CN202022769316.0U CN202022769316U CN213737341U CN 213737341 U CN213737341 U CN 213737341U CN 202022769316 U CN202022769316 U CN 202022769316U CN 213737341 U CN213737341 U CN 213737341U
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Abstract
The utility model discloses a prevent stifled type curve coal breakage structure, including kuppe and the cylinder of connection at kuppe top open end, the winding has the conveyer belt on the external diameter of cylinder, goes up the direction of delivery of conveyer belt in the inner chamber of kuppe, is provided with the kuppe baffle in the inner chamber of institute kuppe, the kuppe baffle is arc structure, the one end of kuppe baffle and the top surface connection of kuppe, the conveyer belt under the other end perpendicular to of just kuppe baffle is connected to the other end of kuppe baffle and the bottom open end of kuppe, the bottom open end of kuppe baffle still communicates there is the curve coal breakage pipe. The utility model discloses reduced the impact, increased the area of contact of coal stream with the pipe wall, become the sudden kinetic energy loss that the striking arouses the slow kinetic energy loss that the friction arouses, reduced the dust that arouses by the impact and because the wet coal that the striking arouses bonds with the pipe wall to can make coal stream speed controllable in the certain limit through changing kuppe department circular arc parameter.
Description
Technical Field
The utility model belongs to the technical field of coal fired power plant, specifically belong to a prevent stifled type curve coal breakage structure.
Background
The main components of the material transshipment system of the traditional coal-fired power plant transshipment point are as follows: a head blanking hopper 9, a three-way baffle, a coal dropping pipe, a buffering air lock and a material guide chute, and a flow chart of a coal conveying system is shown in figure 1.
In the prior art, materials in the system are thrown out at a head roller at the speed of a belt conveyor, coal flow and a head blanking hopper are impacted in an explosive mode to generate a large amount of dust, the thrown materials are prone to forming disordered coal flow, the disordered coal flow is fully mixed with air in a coal blanking pipe to form high-pressure dust-containing air flow, the materials enter a guide chute along with a large amount of induced air generated when falling, and when the seal between the guide chute and the belt conveyor is not tight, the dust is caused to leak from gaps. The induced air quantity entering the guide chute is large, so that a positive pressure state in the guide chute is caused, the induced air speed in the guide chute is too high, the dust particle size dispersion range is large, the dust remover can extract coal particles, but the dust cannot be extracted at a high horizontal air speed, the dust removal efficiency is low, and the maintenance cost is high. And the falling flow velocity of the coal flow thrown out is too high, so that the impact angle between the coal flow and the pipe wall of the traditional coal dropping pipe is too large. The original kinetic energy loss is almost lost after collision, and the phenomena of coal blockage and coal accumulation are easy to occur when the coal quality is poor and the humidity is high.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that exists among the prior art, the utility model provides an prevent stifled type curve coal breakage structure solves among the prior art head blanking fill and easily lets the coal stream form the state of disorder and disorderly and the velocity of flow too fast thereby lead to whole coal conveying system dust too big and easily take place chute blockage and long-pending coal phenomenon at the coal breakage pipe end.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides an prevent stifled type curve coal breakage structure, includes kuppe and connects the cylinder at kuppe top open end, the winding has the conveyer belt on the external diameter of cylinder, in the direction of delivery of going up the conveyer belt towards the inner chamber of kuppe, be provided with the kuppe baffle in the inner chamber of institute kuppe, the kuppe baffle is the arc structure, the one end of kuppe baffle and the top surface connection of kuppe, the conveyer belt under the other end perpendicular to of just kuppe baffle is connected to the bottom open end of the other end of kuppe baffle and kuppe, the bottom open end of kuppe baffle still communicates there is the curve coal breakage pipe.
Furthermore, the included angle between the coal flow conveyed by the upper conveying belt and the baffle of the flow guide cover in the first contact is within 10 degrees.
Furthermore, the device also comprises an upper funnel, a three-way distributor and a lower funnel, wherein the open end of the bottom of the air guide sleeve is communicated with the curved coal dropping pipe through the upper funnel, the three-way distributor and the lower funnel in sequence, and the port connected with the curved coal dropping pipe faces the lower conveying belt.
Furthermore, the curved coal dropping pipe is divided into a coal flowing section close to the air guide sleeve and a coal dropping section close to the lower conveying belt, the coal flowing section and the coal dropping section are integrally formed, the coal flowing section is obliquely arranged towards the direction of the lower conveying belt, and the outlet of the coal dropping section is arranged towards the conveying direction of the lower conveying belt.
Furthermore, the junction of the coal flowing section and the coal dropping section is of an arc structure.
Further, the center of the outlet of the coal falling section is aligned with the center of the lower conveying belt.
Furthermore, the welding seam of the curve coal dropping pipe is arranged in the area where the curve coal dropping pipe does not contact with the coal flow.
Furthermore, the curved coal dropping pipe adopts a circular pipe section.
Furthermore, a plurality of personal hole doors are arranged on the pipe section of the curve coal dropping pipe, which is not contacted with the coal flow.
Furthermore, the curved coal dropping pipe is made of a composite surfacing high-chromium wear-resistant alloy steel plate material.
Compared with the prior art, the utility model discloses following beneficial effect has at least:
the utility model discloses a prevent stifled type curve coal breakage structure intervenes the falling motion of the flow of coal through the kuppe baffle that has the radian, makes the coal stream change into according to the predetermined route landing by throwing freely falling into, guarantees that the coal stream is concentrated, reduces the impact, reduces the induced wind intensity that arouses by the coal stream motion, avoids the baffle box malleation too high to and the production of dust. And the direct contact between the coal flow and the air guide sleeve is changed into arc transition between the coal flow and the air guide sleeve baffle plate, so that the coal flow which is originally directly impacted on the coal dropping pipe is changed into the coal flow which is contacted with the inner wall of the coal dropping pipe along the tangential direction and then falls along the inner wall in a spiral curve form, the impact is reduced, the contact area between the coal flow and the pipe wall is increased, the sudden kinetic energy loss caused by the impact is changed into the slow kinetic energy loss caused by friction, the dust caused by the impact and the adhesion between wet coal and the pipe wall caused by the impact are reduced, and the coal flow speed can be controlled within a certain range by changing the arc parameter at the air guide sleeve.
Furthermore, the included angle formed by the first contact of the coal flow transmitted by the upper conveying belt and the baffle of the flow guide cover is within 10 degrees, so that the speed of the coal flow is reduced to the most appropriate range, and the adhesion of wet coal and the pipe wall caused by the impact of the coal flow on the inner wall of the coal dropping pipe is reduced.
Furthermore, the angle at the outlet of the coal dropping pipe enables the coal flow velocity direction originally perpendicular to the belt to be decomposed into three directions of being perpendicular to the lower conveying belt direction, being along the lower conveying belt direction and being along the lower conveying belt transmission direction, so that the velocity in the vertical direction is reduced, the impact and the abrasion to the subordinate equipment are reduced, the safe soft landing of the material on the belt is realized, the generation of material leakage and dust raising is effectively reduced, and the belt tearing phenomenon is thoroughly eliminated.
Furthermore, the junction of the coal flowing section and the coal dropping section is of an arc structure, and no bevel appears, so that the coal flows slide down along the predicted optimal route in the coal dropping pipe, and the excessive kinetic energy loss of the coal flows is avoided.
Furthermore, the center of the outlet of the coal dropping section is aligned with the center of the lower conveying belt, so that the contact position of the coal flow and the lower conveying belt is in the center of the lower conveying belt, the deviation of the lower conveying belt and the coal scattering caused by unbalance loading are prevented, and the effective output of the lower conveying belt is ensured.
Furthermore, the welding seam of the curved coal dropping pipe is arranged in the area where the curved coal dropping pipe is not in contact with the coal flow, so that the coal flow slides downwards along the predicted optimal route in the coal dropping pipe, and the excessive kinetic energy loss of the coal flow is avoided.
Furthermore, the curved coal dropping pipe adopts a circular pipe section, so that the coal accumulation probability is reduced.
Furthermore, a plurality of manhole doors are arranged on the pipe section of the curve coal dropping pipe, which is not in contact with the coal flow, so that the curve coal dropping pipe is conveniently dredged when coal piling and coal accumulation are generated on the curve coal dropping pipe, convenience and rapidness are realized, and the operation is simple and different.
Drawings
FIG. 1 is a schematic view of a prior art coal handling system in use;
FIG. 2 is an enlarged partial schematic view of the inner cavity of the pod;
FIG. 3 is a schematic structural view of the present invention;
fig. 4 is a schematic view of the working state of the present invention;
FIG. 5 is a side view of the structure of FIG. 4;
in the drawings: 1-upper conveyer belt, 2-roller, 3-dome, 4-upper funnel, 5-three-way distributor, 6-lower funnel, 7-curved coal dropping pipe, 8-lower conveyer belt, 9-head dropping hopper, 10-dome baffle, 11-coal flow.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description.
As shown in figure 2, the utility model provides an anti-blocking type curve coal breakage structure, which comprises a flow guide cover 3 and a roller 2 connected with the top opening end of the flow guide cover 3, wherein an upper conveying belt 1 is wound on the outer diameter of the roller 2, the roller 2 rotates to drive the upper conveying belt 1 to transmit, the upper conveying belt 1 conveys coal into the inner cavity of the flow guide cover 3, the conveying direction of the upper conveying belt 1 faces to the inner cavity of the flow guide cover 3, a flow guide cover baffle plate 10 is arranged in the inner cavity of the flow guide cover 3, the flow guide cover baffle plate 10 is of an arc structure, one end of the flow guide cover baffle plate 10 is connected with the top surface of the flow guide cover 3, the other end of the flow guide cover baffle plate 10 is connected with the bottom opening end of the flow guide cover 3, the other end of the flow guide cover baffle plate 10 is vertical to a lower conveying belt 8, the bottom opening end of the flow guide cover baffle plate 10 is also communicated with a curve coal breakage pipe 7, and an arc flow guide cover baffle plate 10 is additionally arranged in the flow guide cover 3, the coal flow falls in a cluster along the curve of the baffle plate and has uniform and moderate speed, thereby effectively eliminating the phenomena that a coal dropping pipe is blocked and dust is easily generated when high-water content materials are conveyed.
As shown in fig. 3, specifically, the bottom opening end of the air guide sleeve 3 is sequentially communicated with an upper funnel 4, a three-way distributor 5, a lower funnel 6 and a curved coal dropping pipe 7, wherein the outlet end of the upper funnel 6 is perpendicular to the lower conveyer belt 8, the outlet of the upper funnel 4 is communicated with one opening end of the three-way distributor 5, the other port of the three-way distributor 5 is communicated with the lower funnel 6, and the outlet of the lower funnel 6 is communicated with one port of the curved coal dropping pipe 7, wherein the three-way distributor 5 converts the sliding path between the upper funnel 4 and the lower funnel 6 into an arc path, the outlet of the lower funnel 6 faces the lower conveyer belt 8, the outlet of the lower funnel 6 is communicated with the curved coal dropping pipe 7, wherein, as shown in fig. 4 and 5, the curved coal dropping pipe 7 is divided into a coal flowing section near the air guide sleeve 3 and a coal dropping section near the lower conveyer belt 8, the coal flowing section and the coal dropping section are integrally formed, the coal flowing section is obliquely arranged toward the lower conveyer belt 8, the coal flowing section has a certain radian but the radian cannot be too large so as to avoid the phenomena of coal piling and coal accumulation in the curved coal dropping pipe 7, and the outlet of the coal dropping section is arranged towards the conveying direction of the lower conveying belt 8.
In the embodiment, the contact part of the coal dropping pipe and the coal flow avoids seams and folding angles, so that the coal flow slides downwards along an expected optimal route in the curved coal dropping pipe 7, and the excessive kinetic energy loss of the coal flow is avoided. Specifically, the welding seam of the curved coal dropping pipe 7 of the utility model is arranged in the area of the curved coal dropping pipe 7 which is not contacted with the coal flow, and the junction of the coal flow section and the coal dropping section is of an arc structure; meanwhile, the curved coal dropping pipe 7 with the curved structure enables the center distance between the top port and the bottom port of the curved coal dropping pipe 7 to be reduced, so that the kinetic energy loss caused by coal flow friction is reduced, and when the center distance between the top port and the bottom port of the curved coal dropping pipe 7 is larger, the curved coal dropping pipe 7 is additionally provided with a rapping device at a place with a larger pipe section curvature.
In this embodiment, the cross-section of the coal dropping pipe is a circular pipe section, so that the coal accumulation probability is reduced, a manhole door can be opened in the pipe section which is not contacted by coal flow, and when the phenomena of coal piling and coal accumulation occur in the curved coal dropping pipe 7, the pipeline of the curved coal dropping pipe 7 can be cleaned through the manhole door.
In this embodiment, the curved coal dropping pipe 7 is made of a composite surfacing high-chromium wear-resistant alloy steel plate. The design of the curve coal dropping pipe 7 is combined with coal parameters to carry out design calculation, and streamline design is adopted, so that the direct impact of the dropping on a receiving belt is avoided, the actual data coupling of the dynamic repose angle of the material is carried out, the final simulation parameters are determined, the operation performance index is met, and the functions of dust removal, blockage prevention, speed reduction and impact reduction are achieved.
The utility model discloses a manufacturing process as follows:
(1) through simulation calculation, the motion state of the coal flow is simulated, the falling motion of the coal flow is interfered, the coal flow is changed from free falling to sliding along a preset route, the coal flow is centralized, the induced wind strength caused by the coal flow motion is reduced, and the over-high positive pressure of the guide chute is avoided.
(2) The conversion process between kinetic energy and gravitational potential energy of coal flow in falling is controlled through the structural design of the flow guide cover baffle 10 and the curved coal dropping pipe 7, the curved coal dropping pipe 7 avoids seams and folding angles, the coal flow slides downwards in the curved coal dropping pipe 7 along an expected optimal route, and coal blockage is avoided.
(3) The lower section of the curved coal dropping pipe 7 is designed to ensure that the horizontal speed of the coal flow is close to the speed of the lower conveying belt, and the vertical speed is reduced as much as possible, so that the abrasion of the coal flow to the lower conveying belt and the impact of the coal flow to lower-level equipment caused by relative motion are reduced, the service life of the lower conveying belt 8 is prolonged, and the maintenance cost of the equipment is reduced.
(4) By controlling the movement track of the coal flow and aligning the center of the outlet of the coal dropping section in the curved coal dropping pipe 7 with the center of the lower conveying belt 8, the contact position of the coal flow and the lower conveying belt 8 is in the center of the lower conveying belt 8, the lower conveying belt 8 is prevented from deviating and coal is prevented from scattering, and the effective output of the lower conveying belt 8 is ensured.
(5) The baffle 10 of the flow guide cover must adopt a curve design to ensure that the contact angle of the coal flow and the restraint baffle is in an optimal range, wherein when the included angle formed by the coal flow conveyed by the upper conveying belt 1 and the baffle 10 of the flow guide cover in the first contact is within 10 degrees, the speed of the coal flow is most appropriate, the cluster movement of the coal flow is ensured, the impact is reduced, and the generation of induced wind is avoided.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the technical solution of the present invention, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: those skilled in the art can still modify or easily conceive of changes in the technical solutions described in the foregoing embodiments or make equivalent substitutions for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides an anti-blocking type curve coal breakage structure, its characterized in that includes kuppe (3) and connects cylinder (2) at kuppe (3) open-top end, the winding has last conveyer belt (1) on the external diameter of cylinder (2), in the direction of delivery of going up conveyer belt (1) towards the inner chamber of kuppe (3), be provided with kuppe baffle (10) in the inner chamber of kuppe (3), kuppe baffle (10) are the arc structure, the one end of kuppe baffle (10) and the top surface connection of kuppe (3), the other end of kuppe baffle (10) and the bottom open end of kuppe (3) are connected and conveyer belt (8) under the other end perpendicular to of kuppe baffle (10), the bottom open end intercommunication of kuppe baffle (10) has curve coal breakage pipe (7).
2. The anti-blocking type curved coal breakage structure according to claim 1, wherein an included angle between the coal flow conveyed by the upper conveyor belt (1) and the baffle plate (10) of the air guide sleeve in the first contact is within 10 degrees.
3. The anti-blocking type curve coal breakage structure of claim 1, further comprising an upper funnel (4), a three-way distributor (5) and a lower funnel (6), wherein the bottom opening end of the air guide sleeve (3) is communicated with the curve coal breakage pipe (7) sequentially through the upper funnel (4), the three-way distributor (5) and the lower funnel (6), and the port where the lower funnel (6) and the curve coal breakage pipe (7) are connected faces the lower conveying belt (8).
4. The anti-blocking type curved coal breakage structure according to claim 1, wherein the curved coal breakage pipe (7) is divided into a coal flow section near the air guide sleeve (3) and a coal breakage section near the lower conveying belt (8), the coal flow section and the coal breakage section are integrally formed, the coal flow section is obliquely arranged towards the direction of the lower conveying belt (8), and an outlet of the coal breakage section is arranged towards the conveying direction of the lower conveying belt (8).
5. The anti-blocking type curved coal breakage structure according to claim 4, wherein the junction of the coal flowing section and the coal breakage section is an arc-shaped structure.
6. An anti-blocking type curved coal breakage structure according to claim 4, characterized in that the center of the outlet of the coal breakage section is aligned with the center of the lower conveyor belt (8).
7. The anti-blocking type curved coal breakage structure according to claim 1, wherein the welding seam of the curved coal breakage pipe (7) is arranged in a region where the curved coal breakage pipe (7) does not contact with coal flow.
8. The anti-blocking type curved coal breakage structure according to claim 1, wherein the curved coal breakage pipe (7) is a circular pipe section.
9. The anti-blocking type curved coal breakage structure according to claim 1, wherein a plurality of individual hole doors are arranged on the section of the curved coal breakage pipe (7) not contacting with the coal flow.
10. The anti-blocking type curved coal breakage structure according to claim 1, wherein the curved coal breakage pipe (7) is made of a composite surfacing high-chromium wear-resistant alloy steel plate material.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022769316.0U CN213737341U (en) | 2020-11-25 | 2020-11-25 | Anti-blocking type curve coal breakage structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022769316.0U CN213737341U (en) | 2020-11-25 | 2020-11-25 | Anti-blocking type curve coal breakage structure |
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| CN213737341U true CN213737341U (en) | 2021-07-20 |
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| CN202022769316.0U Active CN213737341U (en) | 2020-11-25 | 2020-11-25 | Anti-blocking type curve coal breakage structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114368578A (en) * | 2022-01-21 | 2022-04-19 | 中国电力工程顾问集团西北电力设计院有限公司 | From abrasionproof coal breakage pipe |
-
2020
- 2020-11-25 CN CN202022769316.0U patent/CN213737341U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114368578A (en) * | 2022-01-21 | 2022-04-19 | 中国电力工程顾问集团西北电力设计院有限公司 | From abrasionproof coal breakage pipe |
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