Coal drop pipe assembly

Abstract

The utility model discloses a coal dropping pipe assembly, which relates to the technical field of coal conveying equipment and comprises a coal dropping pipe, a coal scraping assembly, a driving assembly and a vibrator. A coal falling opening is formed in the top of the coal falling pipe; the coal scraping assembly is movably installed in the coal falling pipe and provided with a coal scraping piece, and the coal scraping piece abuts against the inner wall of the coal falling pipe; the driving assembly is mounted at one end of the coal dropping pipe and is in driving connection with the coal scraping assembly, so that the coal scraping assembly has the circumferential and axial movement strokes of the coal dropping pipe; the vibrator is fixedly installed on the coal scraping piece. According to the technical scheme, the vibrating piece is arranged on the coal scraping assembly, high-frequency vibration is generated on the coal scraping piece through the vibrating piece, the high-frequency vibration is transmitted to raw coal attached to the wall of the coal falling pipe, the raw coal can fall off from the wall of the coal falling pipe more easily, the load borne by the motor is smaller, and the effect of protecting the motor is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of coal conveying equipment, in particular to a coal dropping pipe assembly. Background Art

[0002] There is a coal dropping pipe more than ten meters long between the coal outlet of the fully enclosed coal feeder of the circulating fluidized bed boiler in the thermoelectric workshop and the raw coal entering the furnace. During normal operation, the inner wall of the coal dropping pipe is prone to sticking raw coal. Especially when the raw coal is relatively wet, the coal dropping pipe is frequently blocked. Manual dredging has extremely high labor intensity and poor effect, which greatly affects the safe and stable operation of the boiler.

[0003] Therefore, in the prior art, such as the technical solution in CN212901485U, a motor is used to drive a coal scraping member to rotate inside the wall of the coal dropping pipe to clean the raw coal on the wall, so as to realize automatic cleaning by equipment and improve efficiency. However, since the raw coal adheres relatively firmly, the diameter of the coal dropping pipe is generally 273mm and 325mm, and the motor installed in the coal dropping pipe can only be a small motor with limited output power. For CN212901485U, due to the setting form of the self-cleaning device of the coal dropping pipe, a relatively large output power is required to overcome the adhesion force when cleaning from the pipe wall. The small motor runs overloaded for a long time, which will damage the equipment and there will also be installation hidden dangers. Summary of the Utility Model

[0004] The main object of the utility model is to propose a coal dropping pipe assembly, aiming to make the load smaller when cleaning the raw coal falling inside the wall of the coal dropping pipe, so as to achieve the effect of protecting the motor.

[0005] To achieve the above object, the coal dropping pipe assembly proposed by the utility model includes: a coal dropping pipe, a coal scraping assembly, a driving assembly and a vibrator; a coal dropping port is provided at the top of the coal dropping pipe; the coal scraping assembly is movably installed inside the coal dropping pipe and has a coal scraping member, and the coal scraping member abuts against the inner wall of the coal dropping pipe; the driving assembly is installed at one end of the coal dropping pipe and is drivingly connected to the coal scraping assembly so that the coal scraping member has a circumferential and axial movement stroke inside the coal dropping pipe; the vibrator is fixedly installed on the coal scraping member.

[0006] In an embodiment, the coal scraping assembly further includes: a mounting shaft, and the mounting shaft extends in the same direction as the coal dropping pipe; a plurality of coal scraping members are provided and are installed on the mounting shaft along the circumferential direction of the mounting shaft; a plurality of vibrators are provided and are respectively fixedly connected to the plurality of coal scraping members.

[0007] In an embodiment, the coal scraping member includes:

[0008] a rod portion, one end of which is used for connecting to the mounting shaft;

[0009] a connecting portion, fixedly connected to the other end of the rod portion;

[0010] The abutting part is fixedly arranged on the connecting part and abuts against the inner wall of the coal chute.

[0011] Wherein, at the abutting position, the included angle between the tangent direction of the coal chute and the extending direction of the abutting part is A, and 30° ≤ A ≤ 45°.

[0012] In one embodiment, there are two abutting parts, and the two abutting parts are symmetrically arranged about the extending direction of the rod part.

[0013] In one embodiment, one end of the rod part is used for detachably connecting with the mounting shaft.

[0014] In one embodiment, a limiting groove and a mounting hole are arranged on the outer peripheral side of the mounting shaft. The limiting groove extends in the same direction as the mounting shaft, and the mounting hole communicates with the limiting groove. The coal scraping assembly further includes:

[0015] A limiting member having a first extending part and a second extending part. The first extending part is movably installed in the limiting groove along the extending direction of the mounting shaft, and has a first end and a second end in the extending direction of the mounting shaft. One end of the second extending part is fixedly connected to the first extending part, and the other end extends outside the limiting groove.

[0016] The rod part is provided with a limiting hole, and the rod part is used for passing through the mounting hole so that the limiting hole corresponds to the limiting groove.

[0017] An elastic member extends in the same direction as the mounting shaft, one end abuts against the limiting groove, and the other end abuts against the first end of the limiting member so that the second end of the limiting member passes through the limiting hole.

[0018] In one embodiment, a maintenance opening is arranged on one side of the coal chute, and a cover body is movably installed on the maintenance opening for opening and closing the maintenance opening.

[0019] In one embodiment, a flange is fixedly arranged on the coal chute. The flange is fixedly arranged at one end of the coal chute, and the flange is provided with a plurality of air inlet holes. The coal chute assembly includes a blowing device, and the blowing device is used for communicating with the air inlet holes.

[0020] In one embodiment, the driving assembly includes a hydraulic cylinder. The hydraulic cylinder has a hydraulic cylinder body and a hydraulic push rod. The hydraulic cylinder body is fixedly installed on the flange, and the hydraulic push rod penetrates through the flange and extends into the coal chute to be drivingly connected with the coal scraping assembly.

[0021] In one embodiment, the coal scraping assembly includes a mounting shaft, and the driving assembly further includes a rotating motor. The rotating motor is fixedly connected to the hydraulic push rod and also fixedly connected to the mounting shaft to drive the mounting shaft to rotate along the axial axis of the mounting shaft.

[0022] The technical solution of the present utility model is to provide a vibrating member on the coal scraping assembly, and the vibrating member generates high-frequency vibration on the coal scraping member and transmits it to the raw coal attached to the wall of the coal dropping pipe. The raw coal is more likely to fall off from the wall of the coal dropping pipe. Therefore, the load on the motor is smaller, achieving the effect of protecting the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0024] Figure 1 It is a schematic cross-sectional view of an embodiment of the coal dropping pipe assembly provided by the present utility model;

[0025] Figure 2 For Figure 1 a schematic cross-sectional view of the coal dropping pipe assembly from another perspective in

[0026] Figure 3 For Figure 1 a partial schematic view of the coal dropping pipe assembly in

[0027] Description of the reference numerals in the drawings:

[0028] 100, coal dropping pipe assembly; 1, coal dropping pipe; 11, coal dropping port; 2, coal scraping assembly; 21, coal scraping member; 211, rod part; 2111, limiting hole; 212, connecting part; 213, abutting part; 22, mounting shaft; 23, limiting member; 24, elastic member; 3, driving assembly; 31, hydraulic cylinder; 32, rotating motor; 4, vibrator; 5, flange; 51, air inlet hole; 6, cover body.

[0029] The realization of the object, functional characteristics, and advantages of the present utility model will be further described with reference to the embodiments and the drawings. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the scope of protection of the present utility model.

[0031] It should be noted that if there are directional indications (such as up, down, left, right, front, back,...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative position relationship and movement conditions between components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0032] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution that satisfies both A and B at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0033] In the prior art, in the technical solution of CN212901485U, a motor is used to drive a coal scraping member to rotate inside the wall of the coal dropping pipe to clean the raw coal on the wall, realizing automatic cleaning by equipment and improving efficiency. However, since the raw coal adheres relatively firmly, the diameter of the coal dropping pipe is generally 273 mm and 325 mm, and the motor installed inside the coal dropping pipe can only be a small motor with limited output power. In CN212901485U, due to the setting form of the self-cleaning device of the coal dropping pipe, a relatively large output power is required to overcome the adhesion force when cleaning from the pipe wall. The small motor operates under overload for a long time, which will damage the equipment and there will also be installation hidden dangers.

[0034] The utility model proposes a coal dropping pipe assembly comprising: a coal dropping pipe, a coal scraping assembly, a driving assembly and a vibrator; a coal dropping opening is provided on the top of the coal dropping pipe; the coal scraping assembly is movably installed in the coal dropping pipe, and has a coal scraping part, and the coal scraping part abuts against the inner wall of the coal dropping pipe; the driving assembly is installed at one end of the coal dropping pipe, and is drivingly connected to the coal scraping assembly so that the coal scraping part has a circumferential and axial movable stroke of the coal dropping pipe; the vibrator is fixedly installed on the coal scraping part.

[0035] See also Figure 1 In one embodiment of the utility model, the coal dropping pipe assembly 100 includes: a coal dropping pipe 1, a coal scraping assembly 2, a driving assembly 3 and a vibrator 4; a coal dropping port 11 is provided at the top of the coal dropping pipe 1; the coal scraping assembly 2 is movably installed in the coal dropping pipe 1, and has a coal scraping member 21, and the coal scraping member 21 abuts against the inner wall of the coal dropping pipe 1; the driving assembly 3 is installed at one end of the coal dropping pipe 1, and is drivingly connected to the coal scraping assembly 2, so that the coal scraping member 21 has a circumferential and axial movable stroke of the coal dropping pipe 1; the vibrator 4 is fixedly installed on the coal scraping member 21.

[0036] The technical solution of the utility model is to set a coal scraping assembly 2 in the coal dropping pipe 1, wherein the coal scraping assembly 2 includes a coal scraping member 21, and the coal scraping member 21 abuts against the inner wall of the coal dropping pipe 1. A driving assembly 3 is set at one end of the coal dropping pipe 1, and the driving assembly 3 can drive the coal scraping member 21 to rotate, thereby scraping off the raw coal on the pipe wall of the coal dropping pipe 1. The driving assembly 3 can also drive the coal scraping member 21 to move axially along the coal dropping pipe 1, so that the coal scraping member 21 can clean various places in the coal dropping pipe 1. In order to reduce the adhesion of the raw coal on the pipe wall, the coal scraping member 21 can easily scrape off the raw coal on the pipe wall, thereby reducing the load borne by the motor. Therefore, a vibrating member is set on the coal scraping member 21, and the vibrating member generates high-frequency vibration to the coal scraping member 21. When the coal scraping member 21 contacts the coal dropping pipe 1 and the raw coal in the coal dropping pipe 1, the vibration is transmitted to the coal dropping pipe 1 and the raw coal in the coal dropping pipe 1, so that the two are loose, so that the raw coal on the wall of the coal dropping pipe 1 can be scraped off more easily. Thereby, the operating power of the rotary motor 32 can be reduced.

[0037] In order to improve the efficiency of scraping coal, the coal scraping assembly 2 has a plurality of coal scraping parts 21. Specifically, the coal scraping assembly 2 also includes a mounting shaft 22, and the mounting shaft 22 extends in the same direction as the coal dropping pipe 1. A plurality of coal scraping parts 21 are provided, and are circumferentially mounted on the mounting shaft 22. Correspondingly, a plurality of vibrators 4 are also provided, which are respectively fixedly connected to the plurality of coal scraping parts 21. Compared with the scheme of providing one vibrator 4 and installing it on the mounting shaft 22, since the amplitude of vibration decreases with the increase of the distance from the vibration source, the vibration at the coal scraping part 21 will be greatly weakened by installing the vibrator on the mounting shaft 22, making it difficult for the raw coal attached to the wall of the coal dropping pipe 1 to loosen. Therefore, the vibrator is installed on the coal scraping part 21 to obtain a better vibration effect, and it is easier to clear the raw coal on the inner wall of the coal dropping pipe 1.

[0038] In the prior art (N212901485U), the coal scraper plate extends radially along the fixed column, so during the rotation process, when the coal scraper plate abuts against the raw coal, the raw coal is subjected to a tangential force along the coal drop pipe 1, but not to a radial force along the coal drop pipe 1. Only when the raw coal is subjected to a radial force along the coal drop pipe 1 (towards the axial direction of the coal drop pipe 1), it is easier for the raw coal to escape from the coal drop pipe 1. Therefore, in one type of embodiment, the coal scraper 21 includes: a rod 211, a connecting portion 212 (equivalent to a fixed column in the prior art), and an abutting portion 213 (equivalent to a coal scraper in the prior art); one end of the rod 211 is used to connect with the mounting shaft 22; the connecting portion 212 is fixedly connected to the other end of the rod 211; the abutting portion 213 is fixedly arranged on the connecting portion 212, and abuts against the inner wall of the coal drop pipe 1; wherein, at the abutment point, the angle between the tangent direction of the coal drop pipe 1 and the extension direction of the abutting portion 213 is A, 30°≤A≤45°. The abutting portion 213 is arranged in such a way that, when abutting against the raw coal, the raw coal is subjected to a force along the tangent direction of the coal drop pipe 1 and a force along the radial direction of the coal drop pipe 1 at the same time, and when the forces are of the same magnitude, it is easier to make the raw coal detach from the coal drop pipe 1.

[0039] When the resistance to cleaning the raw coal from one direction is large, it is possible to consider cleaning the raw coal from another direction, so two abutment parts 213 are provided, and the two abutment parts 213 are symmetrically arranged about the extension direction of the rod part 211. The raw coal on the pipe wall can be cleaned when the motor rotates forward or reversely.

[0040] After long-term use, the coal scraper 21 will be deformed or damaged, which will affect the cleaning effect of the raw coal, so the coal scraper plate needs to be replaced in time. Therefore, the installation shaft 22 and the coal scraper 21 need to be detachably connected. Specifically, one end of the rod 211 is used to be detachably connected to the installation shaft 22.

[0041] In a specific embodiment, a limiting groove and a mounting hole are provided on the outer peripheral side of the mounting shaft 22. The limiting groove extends in the same direction as the mounting shaft 22, and the mounting hole communicates with the limiting groove. The coal scraping assembly 2 further includes: a limiting member 23 and an elastic member 24. The limiting member 23 has a first extension portion and a second extension portion. The first extension portion is movably mounted in the limiting groove along the extending direction of the mounting shaft 22, and has a first end and a second end in the extending direction of the mounting shaft 22. One end of the second extension portion is fixedly connected to the first extension portion, and the other end extends outside the limiting groove. A limiting hole 2111 is provided on the rod portion 211. The rod portion 211 is used to penetrate through the mounting hole so that the limiting hole 2111 corresponds to the limiting groove. The elastic member 24 extends in the same direction as the mounting shaft 22, one end abuts against the limiting groove, and the other end abuts against the first end of the limiting member 23, so that the second end of the limiting member 23 penetrates through the limiting hole 2111.

[0042] In order to facilitate the replacement of the coal scraping member 21, a maintenance opening is provided on one side of the coal dropping pipe 1, and a cover body 6 is movably mounted on the maintenance opening for opening and closing the maintenance opening.

[0043] In order to install the driving assembly 3, a flange 5 is fixedly provided on the coal dropping pipe 1, and the flange 5 is fixedly provided at one end of the coal dropping pipe 1. Since the raw coal may still be present in the coal dropping pipe 1 after being scraped off the pipe wall by the coal scraping assembly 2, it is necessary to clean the scraped raw coal in time. The flange 5 is provided with a plurality of air inlet holes 51. The coal dropping pipe assembly 100 includes a blowing device, and the blowing device is used to communicate with the air inlet holes 51. The separated raw coal is blown out in time. In addition, the air blown by the blowing device (which can be hot air) can reduce the moisture in the raw coal, thereby reducing the viscosity of the raw coal and making the raw coal easier to remove.

[0044] In order to realize the movement of the coal scraping member 21 along the axial direction of the coal dropping pipe 1, in one embodiment, the driving assembly 3 includes a hydraulic cylinder 31. The hydraulic cylinder 31 has a hydraulic cylinder 31 main body and a hydraulic push rod. The hydraulic cylinder 31 main body is fixedly mounted on the flange 5, and the hydraulic push rod penetrates through the flange 5 and extends into the coal dropping pipe 1 to be drivingly connected with the coal scraping assembly 2.

[0045] In order to realize the movement of the coal scraping member 21 along the circumferential direction of the coal dropping pipe 1, in one embodiment, the coal scraping assembly 2 includes a mounting shaft 22. The driving assembly 3 further includes a rotating motor 32. The rotating motor 32 is fixedly connected to the hydraulic push rod and is also fixedly connected to the mounting shaft 22 to drive the mounting shaft 22 to rotate along the axial axis of the mounting shaft 22.

[0046] The above are only exemplary embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields, is included in the patent protection scope of the present utility model.

Claims

1. A coal dropping pipe assembly, characterized in that, Comprising: A coal dropping pipe with a coal dropping port at the top; A coal scraping assembly movably installed in the coal dropping pipe, having a coal scraping member that abuts against the inner wall of the coal dropping pipe; A driving assembly installed at one end of the coal dropping pipe and drivingly connected to the coal scraping assembly to enable the coal scraping member to have a circumferential and axial movement stroke in the coal dropping pipe; A vibrator fixedly installed on the coal scraping member.

2. The coal chute assembly according to claim 1, characterized in that, The coal scraping assembly further includes: a mounting shaft extending in the same direction as the coal dropping pipe; a plurality of the coal scraping members are installed circumferentially on the mounting shaft along the mounting shaft; a plurality of the vibrators are provided and are respectively fixedly connected to the plurality of coal scraping members.

3. The coal dropping pipe assembly according to claim 2, characterized in that, The coal scraping member includes: A rod portion, one end of which is used for connection with the mounting shaft; A connecting portion fixedly connected to the other end of the rod portion; An abutting portion fixedly provided on the connecting portion and abutting against the inner wall of the coal dropping pipe; Wherein, the included angle between the tangent direction of the coal dropping pipe at the abutting position and the extending direction of the abutting portion is A, and 30° ≤ A ≤ 45°.

4. The coal chute assembly according to claim 3, characterized in that, Two of the abutting portions are symmetrically arranged with respect to the extending direction of the rod portion.

5. The coal chute assembly according to claim 3, characterized in that, One end of the rod portion is used for detachable connection with the mounting shaft.

6. The coal chute assembly according to claim 5, wherein, A limiting groove and a mounting hole are provided on the outer peripheral side of the mounting shaft. The limiting groove extends in the same direction as the mounting shaft, and the mounting hole communicates with the limiting groove; the coal scraping assembly further includes: A limiting member having a first extending portion and a second extending portion. The first extending portion is movably installed in the limiting groove along the extending direction of the mounting shaft, and has a first end and a second end in the extending direction of the mounting shaft. One end of the second extending portion is fixedly connected to the first extending portion, and the other end extends outside the limiting groove; The rod portion is provided with a limiting hole, and the rod portion is used for passing through the mounting hole so that the limiting hole corresponds to the limiting groove; An elastic member extends in the same direction as the mounting shaft, one end abuts against the limiting groove, and the other end abuts against the first end of the limiting member so that the second end of the limiting member passes through the limiting hole.

7. The coal chute assembly according to claim 1, wherein, An inspection opening is provided on one side of the coal dropping pipe, and a cover body movably installed on the inspection opening is used to open and close the inspection opening.

8. The coal chute assembly according to claim 1, wherein, A flange is fixedly provided on the coal dropping pipe. The flange is fixedly provided at one end of the coal dropping pipe, and the flange is provided with a plurality of air inlet holes. The coal dropping pipe assembly includes a blowing device for communicating with the air inlet holes.

9. The coal chute assembly according to claim 8, characterized in that, The driving assembly includes a hydraulic cylinder. The hydraulic cylinder has a hydraulic cylinder body and a hydraulic push rod. The hydraulic cylinder body is fixedly installed on the flange, and the hydraulic push rod penetrates through the flange and extends into the coal dropping pipe to be drivingly connected to the coal scraping assembly.

10. The coal dropping pipe assembly according to claim 9, wherein, The coal scraping assembly includes a mounting shaft. The driving assembly further includes a rotating motor. The rotating motor is fixedly connected to the hydraulic push rod and is also fixedly connected to the mounting shaft to drive the mounting shaft to rotate along the axial axis of the mounting shaft.

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