阅读说明：本技术 积煤清理装置、给煤机以及给煤机落煤口防堵方法 (Accumulated coal cleaning device, coal feeder and coal feeding port anti-blocking method of coal feeder ) 是由 张同喜 姚路 林文辉 袁鸿生 李敏 冯珑 梁银河 王彦忠 叶剑勇 方良铖 郑君潇 于 2020-08-19 设计创作，主要内容包括：本发明涉及给煤机技术领域,公开了一种积煤清理装置、给煤机以及给煤机落煤口防堵方法。其中,所述积煤清理装置包括积煤报警检测机构和积煤清理机构；所述积煤报警检测机构包括挡板、连杆和限位开关；所述连杆的一端与所述挡板连接,另一端与所述限位开关连接,以使得所述挡板和所述限位开关能够发生联动；在所述挡板产生的位移达到设定阈值时,触发所述限位开关动作；所述积煤清理机构包括连接杆、操作手柄以及与落煤口侧壁的形状相适配的刮板,所述连接杆的一端与所述刮板连接,另一端与所述操作手柄连接。应用本发明的积煤清理装置,无需停运给煤机或对应的整套系统即可对落煤口实施清理、疏通工作。(The invention relates to the technical field of coal feeders and discloses a accumulated coal cleaning device, a coal feeder and a coal dropping port anti-blocking method of the coal feeder. The accumulated coal cleaning device comprises an accumulated coal alarm detection mechanism and an accumulated coal cleaning mechanism; the coal accumulation alarm detection mechanism comprises a baffle, a connecting rod and a limit switch; one end of the connecting rod is connected with the baffle, and the other end of the connecting rod is connected with the limit switch, so that the baffle and the limit switch can be linked; when the displacement generated by the baffle reaches a set threshold value, triggering the limit switch to act; the accumulated coal cleaning mechanism comprises a connecting rod, an operating handle and a scraper matched with the shape of the side wall of the coal dropping port, one end of the connecting rod is connected with the scraper, and the other end of the connecting rod is connected with the operating handle. By applying the accumulated coal cleaning device, the coal dropping port can be cleaned and dredged without stopping the coal feeder or a corresponding whole system.)

1. The accumulated coal cleaning device is characterized by comprising an accumulated coal alarm detection mechanism and an accumulated coal cleaning mechanism;

the coal accumulation alarm detection mechanism comprises a baffle (11), a connecting rod (12) and a limit switch (13); one end of the connecting rod (12) is connected with the baffle (11), and the other end of the connecting rod is connected with the limit switch (13), so that the baffle (11) and the limit switch (13) can be linked; when the displacement generated by the baffle (11) reaches a set threshold value, triggering the limit switch (13) to act;

accumulated coal clearance mechanism include connecting rod (21), operating handle (22) and with scraper blade (23) of the shape looks adaptation of coal breakage mouth lateral wall, the one end of connecting rod (21) with scraper blade (23) are connected, the other end with operating handle (22) are connected, operating handle (22) are provided with anti-skidding line.

2. The accumulated coal cleaning apparatus according to claim 1, wherein an upper edge of the scraper (23) is extended outward to form a flange portion (24).

3. The accumulated coal cleaning device according to claim 1, wherein the accumulated coal alarm detection mechanism further comprises a controller and an alarm connected with the controller, and the limit switch (13) is connected with the controller.

4. The accumulated coal cleaning device according to claim 3, wherein the alarm is a buzzer and/or a warning light.

5. The accumulated coal cleaning device according to claim 1, wherein the accumulated coal alarm detection mechanism further comprises a relay and an alarm connected with the control, and the limit switch (13) is connected with the relay.

6. Accumulated coal cleaning device according to claim 1, characterized in that one side of the baffle (23) is provided with a hinge (14).

7. Accumulated coal cleaning device according to claim 1, characterised in that the connecting rod (21) is articulated with the scraper (23).

8. A coal feeder, characterized in that the coal feeder comprises a coal drop opening (30) and a coal accumulation cleaning device according to any one of claims 1 to 7, the coal alarm detection mechanism being arranged at an upper edge of the coal drop opening (30), the coal accumulation cleaning device being arranged on a side wall of the coal drop opening (30).

9. The coal feeder according to claim 8, characterized in that the scraper (23) is attached to the inner wall of the coal drop opening (30), an opening (31) arranged along the circumferential direction of the coal drop opening (30) is arranged on the side wall of the coal drop opening (30), one end of the connecting rod (21) passes through the opening (31) to be connected with the scraper (23), and the other end of the connecting rod is located outside the coal drop opening.

10. A coal feeder coal drop port blockage prevention method, characterized by comprising the coal feeder of any one of claims 8 to 9, the coal feeder coal drop port blockage prevention method comprising: the accumulated coal alarming and detecting mechanism sends out an alarming signal, and the accumulated coal cleaning mechanism is utilized to dredge and clean the accumulated coal at the coal drop port according to the alarming signal.

Technical Field

The invention relates to the technical field of coal feeders, in particular to a accumulated coal cleaning device, a coal feeder and a coal outlet blockage prevention method of the coal feeder.

Background

The coal feeder is one of main devices in a powder preparation system of a coal-fired power plant, raw coal is uniformly and continuously conveyed to a coal mill according to a certain flow rate, under the influence of plum rain seasons, the moisture content of the coal entering a coal feeder from a coal bunker is increased, the caking property is improved, the coal is easily stuck on the pipe wall of a coal dropping port 30 (shown in figure 1) in the area of the coal dropping port of the coal feeder after being weighed by a belt of the coal feeder, the amount of the stuck coal is gradually increased, the coal dropping port of the coal feeder is blocked, and the coal stuck on the pipe wall of the coal dropping port of the coal feeder can be cleaned only by stopping the corresponding whole system and isolating a cold and hot air door of the system, so that the problem of load limitation of a generator set can be caused.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a accumulated coal cleaning device, which is used for effectively solving the problem of accumulated coal at a coal dropping port of a coal feeder and ensuring the normal operation of the coal feeder.

In order to achieve the above object, a first aspect of the present invention provides a deposited coal cleaning apparatus, including a deposited coal alarm detecting mechanism and a deposited coal cleaning mechanism;

the coal accumulation alarm detection mechanism comprises a baffle, a connecting rod and a limit switch; one end of the connecting rod is connected with the baffle, and the other end of the connecting rod is connected with the limit switch, so that the baffle and the limit switch can be linked; when the displacement generated by the baffle reaches a set threshold value, triggering the limit switch to act;

accumulated coal clearance mechanism include connecting rod, operating handle and with the scraper blade of the shape looks adaptation of coal breakage mouth lateral wall, the one end of connecting rod with the scraper blade is connected, the other end with operating handle connects, operating handle is provided with anti-skidding line.

After the accumulated coal cleaning device is applied to a coal drop port of a coal feeder, when accumulated coal occurs at the coal drop port, the accumulated coal alarm detection mechanism sends out an alarm signal, and according to the alarm signal, the accumulated coal at the coal drop port is dredged and cleaned by the accumulated coal cleaning mechanism so as to ensure the normal operation of the coal feeder. By applying the accumulated coal cleaning device, the coal dropping port can be cleaned and dredged without stopping the coal feeder or a corresponding whole system. The method can overcome the technical problems in the prior art and has remarkable progress.

Further, the upper edge of the scraper extends outwards to form a flange part.

Furthermore, coal accumulation alarm detection mechanism still include the controller and with the alarm of control connection, limit switch with the controller is connected.

Further, the alarm is a buzzer and/or a warning lamp.

Furthermore, coal accumulation alarm detection mechanism still include the relay and with the alarm of control connection, limit switch with the relay is connected.

Further, one side of the baffle is provided with a hinge.

Further, the connecting rod is hinged to the scraper.

The invention provides a coal feeder which comprises a coal dropping port and the accumulated coal cleaning device, wherein the coal alarm detection mechanism is arranged at the upper edge of the coal dropping port, and the accumulated coal cleaning device is arranged on the side wall of the coal dropping port.

Through the technical scheme, when the coal accumulation occurs at the coal dropping port, the coal accumulation alarm detection mechanism sends out an alarm signal, and according to the alarm signal, the accumulated coal at the coal dropping port is dredged and cleaned by the accumulated coal cleaning mechanism so as to ensure the normal operation of the coal feeder. According to the coal feeder disclosed by the invention, when the coal accumulation occurs at the coal drop port, the coal feeder or a corresponding whole system does not need to be stopped, and the coal drop port can be cleaned and dredged in the normal operation process of the coal feeder or the corresponding system. The method can overcome the technical problems in the prior art and has remarkable progress.

Further, the scraper blade with the inner wall laminating of coal breakage mouth, be provided with on the lateral wall of coal breakage mouth along the opening that the circumference of coal breakage mouth was arranged, the one end of connecting rod is passed the opening with the scraper blade is connected, and the other end is located outside the coal breakage mouth.

The invention provides a coal feeder coal drop port anti-blocking method, which comprises the coal feeder, and the coal feeder coal drop port anti-blocking method comprises the following steps: the accumulated coal alarming and detecting mechanism sends out an alarming signal, and the accumulated coal cleaning mechanism is utilized to dredge and clean the accumulated coal at the coal drop port according to the alarming signal.

Through the technical scheme, when the coal accumulation occurs at the coal dropping port, the coal accumulation alarm detection mechanism sends out an alarm signal, and according to the alarm signal, the accumulated coal at the coal dropping port is dredged and cleaned by the accumulated coal cleaning mechanism so as to ensure the normal operation of the coal feeder. By applying the anti-blocking method, when the coal outlet of the coal feeder is influenced by the accumulated coal at the coal outlet, the coal feeder or a corresponding whole system does not need to be stopped, and the coal outlet can be cleaned and dredged in the normal operation process of the coal feeder or the corresponding system. The method can overcome the technical problems in the prior art and has remarkable progress.

Additional features and advantages of the invention will be set forth in the detailed description which follows.

Drawings

FIG. 1 is a schematic diagram of a prior art coal feeder coal drop opening when coal accumulation occurs;

FIG. 2 is a schematic structural diagram of one embodiment of a coal accumulation alarm detection mechanism according to the present invention;

FIG. 3 is a schematic structural view of an embodiment of a coal deposit clearing mechanism;

FIG. 4 is a schematic structural view of another embodiment of the accumulated coal cleaning mechanism;

FIG. 5 is a schematic structural view of an embodiment of a coal drop port;

FIG. 6 is a schematic structural view of yet another embodiment of a coal deposit clearing mechanism;

FIG. 7 is a schematic view showing an assembled state of the accumulated coal cleaning mechanism after being assembled to the coal dropping port;

FIG. 8 is a state diagram of the coal accumulation alarm detecting mechanism installed at the coal drop port;

FIG. 9 is a schematic view showing an assembled state of the accumulated coal cleaning mechanism after being assembled to the coal dropping port.

Description of the reference numerals

11 baffle 12 connecting rod

13 limit switch 21 connecting rod

22 operating handle 23 scraper

24 flange 30 coal drop

14 hinge 25 stopper

251 notch

Detailed Description

The following describes in detail specific embodiments of the present invention. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

In the present invention, the use of the terms of orientation such as "upper and lower" in the case where no description is made to the contrary generally means the orientation in the assembled and used state. "inner and outer" refer to the inner and outer contours of the respective component itself.

The invention provides a accumulated coal cleaning device which comprises an accumulated coal alarm detection mechanism and an accumulated coal cleaning mechanism.

As shown in fig. 2, the coal accumulation alarm detection mechanism comprises a baffle plate, a connecting rod and a limit switch; one end of the connecting rod is connected with the baffle, and the other end of the connecting rod is connected with the limit switch, so that the baffle and the limit switch can be linked; and when the displacement generated by the baffle reaches a set threshold value, triggering the limit switch to act. Preferably, as shown in fig. 2, one side of the flap is provided with a hinge 14. By means of which hinge 14 can be hinged with a peripheral fixture. Hinge 14 may be a hinge. The connecting rod 21 and the scraper 23 may be fixedly connected or hinged.

As shown in fig. 3, the accumulated coal cleaning mechanism includes a connecting rod, an operating handle and a scraper 23 adapted to the shape of the side wall of the coal dropping port, one end of the connecting rod 21 is connected to the scraper 23, and the other end is connected to the operating handle 22.

The term "fit" as used herein means that, if the side wall of the coal dropping port is circular, the scraper 23 is also circular. This ensures that the scraper 23 can be attached to the side wall of the coal dropping port.

The coal dropping port 30 is a tubular structure, and the cross section of the coal dropping port can be round or oval. In a preferred embodiment, the coal drop opening 30 is provided with a circular cross-section. In the embodiment where the coal drop opening 30 has a tubular shape and a circular cross section, the outer peripheral surface of the scraper has the same shape as the inner wall of the coal drop opening 30. Thus, the scraper 23 can be attached to the inner wall of the coal dropping port 30.

In addition, the thickness of the scraper 23 should not be too thick, otherwise, the opening of the coal dropping port 30 would be indirectly reduced, and the coal output efficiency would be affected. Preferably, the thickness of the blade 23 is between 1cm and 2 cm.

Preferably, the accumulated coal cleaning mechanisms are provided in two sets, and the two sets of accumulated coal cleaning mechanisms are arranged on opposite side walls of the coal dropping opening 30. This increases the scraping range of the scraper 23, so that it can clean every accumulated coal on the wall surface of the coal dropping port 30.

According to the technical scheme, after the accumulated coal cleaning device is applied to the coal dropping port 30 of the coal feeder, when accumulated coal occurs at the coal dropping port, the accumulated coal alarm detection mechanism sends out an alarm signal, and according to the alarm signal, the accumulated coal at the coal dropping port 30 is dredged and cleaned by the accumulated coal cleaning mechanism, so that the normal operation of the coal feeder is ensured. By applying the accumulated coal cleaning device, the coal dropping port 30 can be cleaned and dredged without stopping the coal feeder or a corresponding whole system. The method can overcome the technical problems in the prior art and has remarkable progress.

In order to clean the accumulated coal at the periphery of the upper edge of the coal dropping port 30, in another embodiment of the accumulated coal cleaning mechanism, as shown in fig. 4, a flange portion 24 is provided at the upper edge of the scraper 23, and the flange portion 24 is formed by extending the upper edge of the scraper 23 outwards. In use, the flange portion 24 is attached to the upper edge of the coal drop port 30.

In addition, coal accumulation alarm detection mechanism still include the controller and with the alarm of control connection, limit switch with the controller is connected. Wherein, the alarm is a buzzer and/or a warning light. Preferably, the controller is a PLC controller. Of course, the controller may be replaced by a relay.

The coal accumulation alarm detection mechanism further comprises a DCS operator station which is connected with the controller or the relay, and the controller can transmit signals to the DCS operator station when receiving alarm signals. Staff in the DCS operator station can receive the signal to remind the staff to clean accumulated coal at the coal dropping port 30, and the situation that the accumulated coal port 30 is blocked to influence the normal operation of the coal feeder is avoided.

In a second aspect of the present invention, there is provided a coal feeder, as shown in fig. 5, comprising a coal drop port 30 and the accumulated coal cleaning device. As shown in fig. 8, the coal alarm detecting mechanism is provided at the upper edge of the coal drop port 30. As shown in fig. 9, the accumulated coal cleaning device is disposed on the side wall of the coal dropping port 30. The scraper 23 is attached to the inner wall of the coal dropping port 30, an opening 31 (shown in fig. 5) arranged along the circumferential direction of the coal dropping port 30 is formed in the side wall of the coal dropping port 30, one end of the connecting rod 21 penetrates through the opening 31 to be connected with the scraper 23, the other end of the connecting rod is located outside the coal dropping port 30, and the end is provided with an operating handle 22. In order to increase the friction between the operating handle 22 and the hand, so as to facilitate the grip of the operator, the operating handle 22 is provided with anti-slip threads.

In order to prevent the scraper 23 from separating from the inner wall of the coal dropping opening 30, in an alternative embodiment, a stopper 25 is provided. Preferably, the limiting block 25 is arranged in a ring structure, as shown in fig. 6 and 7, the limiting block 25 is sleeved on the connecting rod 21 and can slide back and forth along the axis of the connecting rod 21. A notch 251 is arranged on the limiting block 25, and the size of the notch 251 is gradually increased from the center of the limiting block 25 to the outside. The stop block 25 is made of an elastic material, such as rubber, and the diameter of its inner ring should be slightly smaller than the diameter of the connecting rod 21, so that it has a force to tighten the connecting rod 21 after it is installed on the connecting rod 21. During the use, with the breach 251 orientation of stopper 25 the connecting rod 21, press stopper 25 for stopper 25 card is in on the connecting rod 21, promote stopper 25, make it with the lateral wall laminating of coal breakage mouth 30, in order to prevent doctor-bar 23 breaks away from the inner wall of coal breakage mouth 30.

The working principle of the accumulated coal cleaning device is briefly explained as follows:

as shown in fig. 8 and 9, when coal accumulation occurs at the coal dropping port 30, the coal accumulation 40 below the baffle plate 11 gradually increases and rises. Since the hinge 14 is provided at one side of the barrier 11, the hinge 14 is connected to a peripheral fixture. Thus, as the coal 40 builds up, it will lift the flap 11 relative to the other end of the hinge 14. One end of the connecting rod 12 is connected with the baffle 11, and the other end is connected with the limit switch 13. Therefore, when the flap 11 rises to a set threshold relative to the other end of the hinged member 14, the limit switch 13 is triggered, and the limit switch 13 triggers a controller or relay which controls the alarm to give an alarm signal. After receiving the alarm signal, the worker operates the operating handle 22 to drive the scraper 23 to move back and forth along the track of the opening 31 so as to scrape off accumulated coal and dredge the coal dropping port 30.

In fig. 7, the direction indicated by the arrow is a coal dropping direction.

In fact, the controller or the relay can be omitted, and the limit switch 13 is directly connected with the alarm to realize the alarm.

The "threshold" in the above description may be set as needed.

Through the technical scheme, the coal feeder or the corresponding whole system does not need to be stopped, and the coal dropping port 30 can be cleaned and dredged in the normal operation process of the coal feeder or the corresponding system. The method can overcome the technical problems in the prior art and has remarkable progress.

The invention provides a coal feeder coal drop port anti-blocking method, which comprises the coal feeder, and the coal feeder coal drop port anti-blocking method comprises the following steps: the accumulated coal alarming and detecting mechanism sends out an alarming signal, and the accumulated coal cleaning mechanism is utilized to dredge and clean the accumulated coal at the coal drop port according to the alarming signal.

Through the technical scheme, when the coal accumulation occurs at the coal dropping port, the coal accumulation alarm detection mechanism sends out an alarm signal, and according to the alarm signal, the accumulated coal at the coal dropping port is dredged and cleaned by the accumulated coal cleaning mechanism so as to ensure the normal operation of the coal feeder. By applying the anti-blocking method, when the coal outlet of the coal feeder is influenced by the accumulated coal at the coal outlet, the coal feeder or a corresponding whole system does not need to be stopped, and the coal outlet can be cleaned and dredged in the normal operation process of the coal feeder or the corresponding system. The method can overcome the technical problems in the prior art and has remarkable progress.

The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.

It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.

In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.