CN214778833U

CN214778833U - Chain breakage protection device for powder conveyor

Info

Publication number: CN214778833U
Application number: CN202022726320.9U
Authority: CN
Inventors: 王驰; 朱华夏; 刘玉华; 黄丹青
Original assignee: Spic Chongqing Hechuan Power Generation Co ltd
Current assignee: Spic Chongqing Hechuan Power Generation Co ltd
Priority date: 2020-11-23
Filing date: 2020-11-23
Publication date: 2021-11-19
Anticipated expiration: 2030-11-23

Abstract

The utility model relates to the technical field of boiler powder conveyors, in particular to a chain breakage protection device of a powder conveyor, which comprises a main frame, a detection mechanism and a trigger mechanism; the main frame is arranged on one side of a driven wheel of the powder conveyor, the detection mechanism is arranged on the main frame, the trigger mechanisms are fixed on the side part of the driven gear and the side part of the driving gear, which are adjacent to the main frame, and the main frame is of an H-shaped structure; through set up a set of trigger mechanism respectively on driving gear and driven gear for whether the processing module receives two sets of pulse signal, can judge out through comparing two sets of pulse signal frequency and appear breaking the chain, can avoid the buggy to fall the broken chain protection maloperation that arouses, improve the rate of accuracy, and can be timely when breaking the chain and take place protect the action.

Description

Chain breakage protection device for powder conveyor

Technical Field

The patent of the utility model relates to a boiler powder conveyor technical field particularly, relates to a powder conveyor broken chain protection device.

Background

Generally, a powder conveying machine is adopted for feeding a boiler, the powder conveying machine comprises a driving motor, a driving gear driven by the driving motor, a driven gear on a conveying mechanism and a chain sleeved between the driving gear and the driven gear, the chain is easy to break in the feeding process, the powder conveying machine cannot be stopped in time after the chain is broken, a large amount of pulverized coal is accumulated on two sides of the powder conveying machine, great trouble is brought to cleaning work, and the powder conveying system cannot be recovered in time;

at present, a set of chain breakage protection equipment is generally additionally arranged in the conventional improvement mode, the common chain breakage protection equipment comprises a detection sheet fixed on a chain or a driven shaft and an electromagnetic proximity switch used for receiving pulse signals, and the electromagnetic proximity switch sends a stop signal to a driving motor to control the driving motor to stop rotating if not receiving the pulse signals within a specified time; however, the coal powder falling from the powder conveying machine easily blocks the signal transmission between the detection piece and the electromagnetic proximity switch, so that the pulse signal is lost, the chain breakage protection misoperation is caused, the chain breakage fault is frequently reported, meanwhile, the existing chain breakage protection equipment needs to wait until the transmission shaft stops rotating, the pulse signal is lost, the triggering chain breakage protection action is sent out, and the chain breakage protection misoperation can not be quickly carried out after the chain breakage occurs.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a powder conveyor chain breakage protection device aims at solving the problem among the prior art.

The utility model discloses a realize like this:

a chain breakage protection device of a powder conveyor comprises a main frame, a detection mechanism and a trigger mechanism; the main frame is arranged on one side of a driven gear of the powder conveyor, the detection mechanism is arranged on the main frame, the trigger mechanisms are fixed on the side part of the driven gear and the side part of the driving gear, which are adjacent to the main frame, and the main frame is of an H-shaped structure; wherein the content of the first and second substances,

the trigger mechanism comprises a disc and a trigger rod, the disc is fixedly arranged on the side part of the driven gear and the side part of the driving gear, the trigger rod is transversely and fixedly arranged on one side of the disc adjacent to the main rack, and the trigger rod is used for triggering a pulse signal of the detection mechanism;

the detection mechanism comprises a sliding rod, a spring, a detection piece, a pulse sensor and a processing module, the pulse sensor is fixedly installed on the right side wall of the main rack, the sliding rod is connected to the left side wall of the main rack in a sliding mode, the sliding rod is arranged between the pulse sensor and the driven gear and driven by a trigger rod, and the axis of the sliding rod is parallel to the axial direction of the driven gear; the slide bar with the one end that the pulse sensor is adjacent be fixed with the pulse sensor corresponds detect the piece the cover is equipped with the spring that is used for the slide bar to reset on the slide bar, processing module respectively with two the driving motor electric connection of pulse sensor, powder transmission machine, processing module is used for analyzing two the pulse signal that the pulse sensor uploaded controls the driving motor work of powder transmission machine.

Preferably, the number of the trigger rods is 2-6, and the trigger rods are uniformly distributed along the circumferential direction of the disc.

Preferably, the trigger bar includes extension rod and a magnet, the one end fixed connection of extension rod is on the disc, and the other end fixedly connected with magnet of extension rod, just the slide bar is kept away from the one end fixedly connected with that detects the piece and magnet repellent No. two magnet.

Preferably, a reinforcing rib is connected between two adjacent extension rods.

Preferably, the processing module comprises a processor and a control panel, the processor is used for detecting the frequency of the pulse signals output by the two pulse sensors, analyzing and comparing the frequency, and the control panel is used for setting parameters.

Compared with the prior art, the utility model provides a chain breakage protection device of a powder conveyor,

1. the processing module receives two groups of pulse signals by respectively arranging the trigger mechanisms on the driving gear and the driven gear, and can judge whether chain breakage occurs or not by comparing the frequencies of the two groups of pulse signals, so that chain breakage protection misoperation caused by coal dust falling can be avoided, the accuracy rate is improved, and protection action can be timely carried out when chain breakage occurs;

2. through setting up magnet and No. two magnets, not only realized will detecting the effect that the piece pushed pulse sensor's response scope, still avoided the contact between trip bar and slide bar, greatly reduced the noise to wearing and tearing have been avoided.

Drawings

Fig. 1 is a block diagram of the chain breakage protection device of the powder conveyor provided by the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to fig. 1 and the following embodiments. It should be understood that the detailed description and specific examples, while indicating the invention, are given by way of illustration only.

The implementation of the present invention will be described in detail below with reference to preferred embodiments.

In a specific embodiment, as shown in fig. 1, the chain breakage protection device of the powder conveyor comprises a main frame 1, a detection mechanism 3 and a trigger mechanism 4; the main frame 1 is arranged on one side of a driven gear 2 of the powder conveyor, the detection mechanism 3 is arranged on the main frame 1, the trigger mechanisms 4 are fixed on the side parts of the driven gear 2 and the driving gear 5 adjacent to the main frame 1, and the main frame 1 is of an H-shaped structure; wherein the content of the first and second substances,

the trigger mechanism 4 comprises a disc 41 and a trigger rod 42, the disc 41 is fixedly installed on the side of the driven gear 2 and the side of the driving gear 5, the trigger rod 42 is transversely and fixedly installed on one side of the disc 41 adjacent to the main frame 1, and the trigger rod 42 is used for triggering a pulse signal of the detection mechanism 3;

the detection mechanism 3 comprises a sliding rod 31, a spring 32, a detection piece 33, a pulse sensor 34 and a processing module 35, wherein the pulse sensor 34 is fixedly installed on the right side wall of the main frame 1, the sliding rod 31 is slidably connected on the left side wall of the main frame 1, the sliding rod 31 is arranged between the pulse sensor 34 and the driven gear 2, the sliding rod 31 is driven by a trigger rod 42, and the axis of the sliding rod 31 is parallel to the axial direction of the driven gear 2; the sliding rod 31 with the one end that pulse sensor 34 is adjacent is fixed with pulse sensor 34 corresponds detect the piece 33 slide rod 31 is equipped with the cover and is used for the spring 32 that slide rod 31 resets, processing module 35 respectively with two pulse sensor 34, the driving motor electric connection of powder conveyor, processing module 35 is used for analyzing two pulse signal that pulse sensor 34 uploaded and control the driving motor work of powder conveyor.

When the device works, the driving motor drives the driving gear 5 and the driven gear 2 to work together, the disc 41 rotates together with the driving gear 5 and the driven gear 2, when the disc 41 drives the trigger mechanism 4 to contact the sliding rod 31, the sliding rod 31 pushes the detection sheet 33 into the sensing range of the pulse sensor 34, when the spring 32 is reset, the detection sheet 33 moves out of the sensing range of the pulse sensor 34, so that the processing module 35 detects a pulse signal, the processing module 35 receives two groups of pulse signals, whether chain breakage occurs or not can be judged by comparing the frequency of the two groups of pulse signals, concretely, when the gear ratio of the driving gear 5 to the driven gear 2 is 1:4, the driving gear 5 rotates for one circle, the driven gear 2 rotates for four circles, the frequency of the pulse signal triggered by the trigger rod 42 on the driven gear 2 is four times that triggered by the trigger rod 42 on the driving gear 5, when the frequency of the pulse signal triggered by the trigger rod 42 on the driven gear 2 falls to four times of the frequency of the pulse signal triggered by the trigger rod 42 on the driving gear 5, the processing module 35 judges that the powder conveyor has a broken chain, controls the driving motor to stop rotating in time, can avoid the broken chain protection misoperation caused by the falling of the pulverized coal, improves the accuracy rate, and can timely perform protection action when the broken chain occurs.

As an embodiment of the present invention, the number of the triggering rods 42 is 2-6, and the triggering rods 42 are uniformly distributed along the circumferential direction of the disc 41; set up a plurality of trigger bars 42, when driven gear 2 drove a plurality of trigger bars 42 and rotate, can promote the control lever in proper order and make and detect piece 33 and get into pulse sensor 34's detection scope, and then realize sending a plurality of pulse signals in broken chain alarm time within range, avoid the phenomenon that the pulse is lost to appear, further reduce the wrong report of broken chain trouble.

As an embodiment of the present invention, the triggering rod 42 includes an extension rod 421 and a first magnet 422, one end of the extension rod 421 is fixedly connected to the disc 41, the other end of the extension rod 421 is fixedly connected to the first magnet 422, and one end of the sliding rod 31, which is far away from the detecting piece 33, is fixedly connected to a second magnet 423 which is repelled by the first magnet 422; when the first magnet 422 rotates to a position corresponding to the second magnet 423, the second magnet 423 is pushed rightwards, so that the sliding rod 31 pushes the detection piece 33 into the sensing range of the pulse sensor 34, meanwhile, the contact between the trigger rod 42 and the sliding rod 31 is avoided, and the noise is greatly reduced.

As an embodiment of the present invention, two adjacent extension rods 421 are connected to each other by a reinforcing rib 43. The extension bar 421 is prevented from being deformed when rotating at a high speed.

As an embodiment of the present invention, the processing module 35 includes a processor and a control panel, the processor is used for detecting two the pulse signal frequency output by the pulse sensor 34 is analyzed and compared, the control panel is used for setting parameters, and the set parameters are the gear ratio of the driving gear 5 and the driven gear 2.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Although embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims

1. A chain breakage protection device of a powder conveyor is characterized by comprising a main frame, a detection mechanism and a trigger mechanism; the main frame is arranged on one side of a driven gear of the powder conveyor, the detection mechanism is arranged on the main frame, the trigger mechanisms are fixed on the side part of the driven gear and the side part of the driving gear, which are adjacent to the main frame, and the main frame is of an H-shaped structure; wherein the content of the first and second substances,

2. The chain breakage protection device of the powder conveyor as claimed in claim 1, wherein the number of the trigger rods is 2-6, and the trigger rods are uniformly distributed along the circumferential direction of the disc.

3. The chain breakage protection device of the powder conveyor as claimed in claim 2, wherein the triggering rod comprises an extension rod and a first magnet, one end of the extension rod is fixedly connected to the disc, the other end of the extension rod is fixedly connected with the first magnet, and one end of the sliding rod, which is far away from the detection piece, is fixedly connected with a second magnet which is repellent to the first magnet.

4. The chain breakage protection device of the powder conveyor as claimed in claim 3, wherein a reinforcing rib is connected between two adjacent extension rods.

5. The chain breakage protection device of the powder conveyor as claimed in claim 1, wherein the processing module comprises a processor and a control panel, the processor is used for detecting the frequency of the pulse signals output by the two pulse sensors, analyzing and comparing the frequencies, and the control panel is used for setting parameters.