CN215515393U

CN215515393U - Coal blockage prevention protection mechanism for coal discharge cylinder

Info

Publication number: CN215515393U
Application number: CN202122009307.6U
Authority: CN
Inventors: 沈强; 许珂; 单军; 徐海; 尹浩洁
Original assignee: Huaneng Linyi Power Generation Co Ltd
Current assignee: Huaneng Linyi Power Generation Co Ltd
Priority date: 2021-08-25
Filing date: 2021-08-25
Publication date: 2022-01-14
Anticipated expiration: 2031-08-25

Abstract

The utility model provides a coal block prevention protection mechanism for a lower coal cylinder, which comprises a detection device and a control box, wherein the detection device comprises a mounting seat arranged in the lower coal cylinder and an ultrasonic detector positioned in the mounting seat, the control box is connected on the outer wall of the lower coal cylinder, a controller is arranged in the control box, when the ultrasonic detector detects coal block, the controller controls a belt motor to stop running, the bottom surface of the mounting seat is an inclined surface facing to the bottom of the lower coal cylinder, the transmitting end and the receiving end of the ultrasonic detector are arranged on the inclined surface, so that coal is not easy to accumulate at the position of the ultrasonic detector, a connecting rod connected with the mounting seat is arranged in the control box, the connecting rod is perpendicular to the side wall of the lower coal cylinder and can reciprocate along the axial direction of the connecting rod, the mounting seat can be driven to reciprocate by the connecting rod to shake off accumulated coal, the technical effect of automatically cleaning the accumulated coal is realized, and the position of the mounting seat can be changed by the connecting rod, therefore, the detection position of the ultrasonic detector can be flexibly adjusted according to actual requirements.

Description

Coal blockage prevention protection mechanism for coal discharge cylinder

Technical Field

The utility model relates to the technical field of coal conveying system protection, in particular to a coal blockage preventing protection mechanism for a coal discharging cylinder.

Background

The lower coal cylinder is used as an important component of a coal conveying system, and is easy to block in the conveying process when raw coal is wet or raw coal particles are large in viscosity, so that a large amount of raw coal overflows if the raw coal cannot be found and treated in time, equipment accidents are caused, the cleaning problem is caused, and the safe and continuous operation of the coal conveying system is influenced.

The existing coal-blocking-prevention protection mechanism for the lower coal cylinder is divided into a mechanical type and an electric rotating blocking type, the mechanical protection mechanism utilizes the tilting action of a metal rod to connect a contact in the metal rod, so that coal blocking detection is realized, and the mode has the defects that the lower coal cylinder is a closed space, the internal working condition is complex, flying coal blocks can strike the metal rod, the metal rod is frequently tilted, and the misoperation of the coal-blocking protection device is caused; the principle of the electric rotating blocking type protection mechanism is as follows: the mode has the defect that a large amount of sundries such as iron wires, straws, straw ropes, gunny bags and the like are carried during conveying of raw coal, and the sundries can be wound on the electric rotary switch to cause misoperation of the coal blockage protection device.

In order to solve the problems, the anti-blocking coal protection device which is not influenced by coal briquettes and sundries and is accurate in detection appears on the market, a device is disclosed in Chinese patent CN212668153U, but an ultrasonic detector of the device is located in an outward sunken concave part on the wall of a lower coal cylinder, coal is easily accumulated in the sunken concave part, the device not only can interfere with the ultrasonic detector and is difficult to clean up, and the ultrasonic detector is located on the outer side of the wall of the lower coal cylinder, the detection position of the device is large in limitation, and flexible adjustment can not be carried out according to actual requirements.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provide a coal blockage preventing protection mechanism for a coal feeding cylinder, which is not easy to accumulate coal and can automatically clean accumulated coal.

In order to achieve the purpose, the utility model provides a technical scheme that the coal blockage preventing protection mechanism for the lower coal cylinder comprises:

the detection device comprises a mounting seat and an ultrasonic detector arranged in the mounting seat, the mounting seat is arranged in the lower coal barrel, the bottom surface of the mounting seat is an inclined surface facing the bottom of the lower coal barrel, and a transmitting end and a receiving end of the ultrasonic detector are both arranged on the inclined surface;

the control box is connected to the outer wall of the lower coal barrel, a controller is arranged in the control box, the controller is electrically connected with the belt motor and the ultrasonic detector, and when the ultrasonic detector detects that coal is blocked at the bottom of the lower coal barrel, the controller controls the belt motor to stop running;

the coal bucket installation device is characterized in that a connecting rod used for being connected with the installation seat is arranged in the control box, the connecting rod penetrates through the control box and the side wall of the lower coal bucket and is connected with the installation seat, the connecting rod is perpendicular to the side wall of the lower coal bucket, the connecting rod can reciprocate along the axial direction of the connecting rod, and a driving device used for driving the connecting rod to reciprocate is further arranged in the control box.

Preferably, the driving device comprises a driving motor and a cam, the cam is in contact with the end of the connecting rod, and the driving motor drives the connecting rod to reciprocate by driving the cam to rotate.

Further preferably, the driving device further comprises a spring for driving the connecting rod to return, the spring is sleeved on the connecting rod, and two end parts of the spring are respectively abutted against the inner wall of the control box and a nut in threaded connection with the connecting rod.

Preferably, the number of the connecting rods is at least two, and the two connecting rods are arranged at intervals along the up-down direction.

Preferably, the connecting rod is a hollow rod, and a middle cavity of the connecting rod is used for accommodating the connecting wire of the ultrasonic detector and the controller.

Preferably, the top surface of the mounting seat is a smooth surface with a raised middle part.

Further preferably, the top surface of the mounting seat has a herringbone or circular arc-shaped cross section.

Preferably, a detection cylinder is further arranged in the control box, a cylinder rod of the detection cylinder penetrates through the control box and the side wall of the lower coal barrel, when the cylinder rod extends out, the end of the cylinder rod is located on a detection path of the ultrasonic detector, whether the ultrasonic detector is normal or not can be detected, when the cylinder rod retracts, the cylinder rod is separated from the detection path of the ultrasonic detector, and the ultrasonic detector can achieve a detection function.

Further preferably, the end of the cylinder rod is threadedly connected with a hemispherical cover.

Further preferably, the inclined surface and the axial line of the lower coal cylinder form an included angle of 20-50 degrees.

Due to the application of the technical scheme, compared with the prior art, the utility model has the following advantages:

Drawings

Fig. 1 is a schematic illustration of the installation of a preferred embodiment of the present invention.

Fig. 2, 3 and 4 are schematic front views, partially in section, of a preferred embodiment of the utility model, fig. 2 and 3 showing the reciprocating movement of the connecting rod, fig. 4 with the cylinder rod extended.

Fig. 5 is a schematic left side view of fig. 2.

Fig. 6 is a schematic right view of fig. 2.

Fig. 7 is a schematic bottom view of fig. 2.

Fig. 8 is a perspective view of fig. 2.

FIG. 9 is a control logic diagram of another embodiment of the present invention.

Wherein: 10. a detection device; 11. a mounting seat; 111. an inclined surface; 112. a top surface; 121. a transmitting end; 122. a receiving end; 20. a control box; 21. a connecting rod; 211. a first connecting rod; 212. a second connecting rod; 22. a drive device; 221. a drive motor; 222. a cam; 223. a spring; 224. a nut; 23. detecting a cylinder; 231. a cylinder rod; 232. a cover; 24. a panel; 241. a power indicator light; 242. an action indicating lamp; 243. a buzzer; 244. a switch; 245. a delay button; 30. discharging a coal cylinder; 40. a coal conveying belt.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the scope of the present invention can be clearly and clearly defined.

The vertical direction in the present invention refers to the vertical direction in fig. 1.

As shown in fig. 1 to 8, the coal block prevention protection mechanism for the lower coal cylinder provided by the utility model comprises: the detection device 10 comprises a mounting seat 11 and an ultrasonic detector (not shown in the figure) arranged inside the mounting seat 11, the mounting seat 11 is arranged inside the lower coal barrel 30, the bottom surface of the mounting seat 11 is an inclined surface 111 facing the bottom of the lower coal barrel 30, the included angle between the inclined surface 111 and the axial line of the lower coal barrel 30 is preferably 20-50 degrees, in the embodiment, the included angle is 30 degrees, and a transmitting end 121 and a receiving end 122 of the ultrasonic detector are both arranged on the inclined surface 111; the control box 20 is connected to the outer wall of the lower coal cylinder 30, a controller (not shown in the figure) is arranged in the control box 20, the controller is electrically connected with a belt motor (not shown in the figure) of the coal conveying belt 40 and the ultrasonic detector, and when the ultrasonic detector detects that coal is blocked at the bottom of the lower coal cylinder 30, the controller controls the belt motor to stop running.

In this embodiment, a connecting rod 21 for connecting the mounting seat 11 is disposed in the control box 20, the connecting rod 21 penetrates through the side walls of the control box 20 and the lower coal cylinder 30 to be connected with the mounting seat 11, the connecting rod 21 is perpendicular to the side wall of the lower coal cylinder 30, the connecting rod 21 can reciprocate along the axial direction of the connecting rod 21, and a driving device 22 for driving the connecting rod 21 to reciprocate is further disposed in the control box 20.

The advantage that sets up like this lies in, can enough make ultrasonic detector's transmitting terminal 121 and receiving terminal 122 department be difficult for long-pending coal, can drive mount pad 11 reciprocating motion through the reciprocating motion of connecting rod 21 again in order to shake off the long-pending coal on the mount pad 11, realizes clearing up the technological effect of long-pending coal by oneself, can also change the concrete position of mount pad 11 in coal section of thick bamboo 30 down through the length of adjustment connecting rod 21 to adjust ultrasonic detector's detection position in a flexible way according to actual demand.

In this embodiment, the driving device 22 includes a driving motor 221, a cam 222, and a spring 223, the driving motor 221 is fixed in the control box 20, the cam 222 is connected to an output shaft of the driving motor 221, an outer edge of the cam 222 is in contact with an end portion of the connecting rod 21 located in the control box 20, when the output shaft of the driving motor 221 rotates, the driving cam 222 can rotate to drive the connecting rod 21 to move toward a direction close to an axial line of the lower coal barrel 30, the spring 223 is sleeved on the connecting rod 21, two end portions of the spring 223 respectively abut against an inner wall of the control box 20 and a nut 224 screwed onto the connecting rod 21, and the spring 223 is used for driving the connecting rod 21 to move toward a direction away from the axial line of the lower coal barrel 30, so as to achieve the resetting of the connecting rod 21, and thus cooperate with the rotation of the cam 222 to achieve the reciprocating movement of the connecting rod 21.

The advantage that sets up like this lies in, simple structure, and the reciprocating motion of mount pad is stable, and the effect of shake off long-pending coal is good.

In this embodiment, the connecting plate 21 is a hollow rod, the connecting plate 21 includes a first connecting rod 211 and a second connecting rod 212, the first connecting rod 211 and the second connecting rod 212 are disposed at intervals in the up-down direction, specifically, the outer edge of the cam 222 contacts with the end of the first connecting rod 211 located in the control box 20, and the middle cavity of the second connecting rod 212 is used for accommodating the connecting wire of the ultrasonic detector and the controller.

The benefit that sets up like this lies in, can avoid mount pad 11 to produce when reciprocating motion and rotate, avoids ultrasonic detector detection angle's change, can also avoid 11 reciprocating motion of mount pad to drag and rub that the connecting wire produced, can prolong the life of connecting wire and promote this lower coal section of thick bamboo and prevent chute blockage protection mechanism's stability in use.

To avoid coal accumulation on the top of the mounting seat 11, in the present embodiment, the top surface 112 of the mounting seat 11 is a smooth surface with a raised middle portion, and specifically, the top surface 111 of the mounting seat 11 has a herringbone shape in cross section.

In order to confirm whether the ultrasonic detector is normal, in this embodiment, a detection cylinder 23 is further disposed in the control box 20, a cylinder rod 231 of the detection cylinder 23 penetrates through the side walls of the control box 20 and the lower coal barrel 30, when the cylinder rod 231 extends out, the end of the cylinder rod 231 is located on a detection path of the ultrasonic detector, and can detect whether the ultrasonic detector is normal, when the cylinder rod 231 retracts, the cylinder rod 231 is separated from the detection path of the ultrasonic detector, and the ultrasonic detector can realize a detection function, and a hemispherical cover 232 is connected to the end of the cylinder rod 231 through a screw thread, so as to prevent the end of the cylinder rod 231 from generating coal accumulation.

In this embodiment, the panel 24 of the control box 20 is further provided with a power indicator 241, an operation indicator 242, a buzzer 243, a switch 244, and a delay button 245.

Fig. 9 shows the control logic of another embodiment of the present invention in actual operation.

The above embodiments are merely illustrative of the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the content of the present invention and implement the utility model, and not to limit the scope of the utility model, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the scope of the present invention.

Claims

1. A lower coal section of thick bamboo prevents chute blockage protection mechanism includes:

the method is characterized in that:

2. The lower coal cylinder anti-coal-blockage protection mechanism according to claim 1, characterized in that: the driving device comprises a driving motor and a cam, the cam is in contact with the end part of the connecting rod, and the driving motor drives the cam to rotate to drive the connecting rod to reciprocate.

3. The lower coal cylinder anti-coal-blockage protection mechanism according to claim 2, characterized in that: the driving device further comprises a spring for driving the connecting rod to reset, the spring is sleeved on the connecting rod, and two end parts of the spring are respectively abutted against the inner wall of the control box and a nut in threaded connection with the connecting rod.

4. The lower coal cylinder anti-coal-blockage protection mechanism according to claim 1, characterized in that: the connecting rods are at least two and are arranged at intervals along the up-down direction.

5. The lower coal cylinder anti-coal-blockage protection mechanism according to claim 1, characterized in that: the connecting rod is the cavity pole, the middle part cavity of connecting rod is used for holding ultrasonic detector with the connecting wire of controller.

6. The lower coal cylinder anti-coal-blockage protection mechanism according to claim 1, characterized in that: the top surface of the mounting seat is a smooth surface with a raised middle part.

7. The lower coal cylinder anti-coal-blockage protection mechanism according to claim 6, characterized in that: the section of the top surface of the mounting seat is in a herringbone shape or a circular arc shape.

8. The lower coal cylinder anti-coal-blockage protection mechanism according to claim 1, characterized in that: the control box is internally provided with a detection cylinder, a cylinder rod of the detection cylinder penetrates through the control box and the side wall of the lower coal barrel, when the cylinder rod extends out, the end part of the cylinder rod is positioned on a detection path of the ultrasonic detector, whether the ultrasonic detector is normal or not can be detected, when the cylinder rod retracts, the cylinder rod is separated from the detection path of the ultrasonic detector, and the ultrasonic detector can realize a detection function.

9. The lower coal cylinder anti-coal-blockage protection mechanism according to claim 8, characterized in that: the end part of the cylinder rod is in threaded connection with a hemispherical cover cap.

10. The lower cartridge coal blockage prevention protection mechanism according to any one of claims 1 to 9, wherein: the included angle between the inclined surface and the axial lead of the lower coal cylinder is 20-50 degrees.