CN212449441U

CN212449441U - Belt conveyor material-breaking alarm interlocking device

Info

Publication number: CN212449441U
Application number: CN202021063957.8U
Authority: CN
Inventors: 李辉德; 张小玲
Original assignee: Wengfu Zijin Chemical Industry Co Ltd
Current assignee: Wengfu Zijin Chemical Industry Co Ltd
Priority date: 2020-06-11
Filing date: 2020-06-11
Publication date: 2021-02-02
Anticipated expiration: 2030-06-11

Abstract

The utility model discloses a material-breaking alarm interlocking device of a belt conveyor, which is characterized in that a gantry support is made of steel bars on a support of the belt conveyor, and the top and the middle part of the gantry support are connected with a plurality of steel bars in the backward horizontal direction; welding the tail end of the top steel bar by using angle iron; a normally closed proximity switch is arranged in the middle of the angle iron in a punching way and is connected with a time relay; the tail ends of steel bars in the middle of two ends of the gantry support are provided with connecting holes, a cross movable connecting rod passes through the connecting holes, a small iron block is welded at the top of the connecting hole, the proximity switch can sense through the iron block, and the cross movable connecting rod can swing at any angle in the connecting holes; a light spring is arranged between the cross movable connecting rod and the middle upper part of the gantry support; the proximity switch and the top end of the cross movable connecting rod keep a distance of 3-5 mm. The utility model discloses simple manufacture, the effect is showing, can extensively use on likely defeated coal, defeated likepowder or graininess band conveyer such as fertilizer.

Description

Belt conveyor material-breaking alarm interlocking device

Technical Field

The utility model relates to a powdery material band conveyer specifically is a band conveyer's disconnected material is reported to the police and a technique of interlocking.

Background

The belt conveyor is widely applied to the product conveying links of enterprises in various industries, but sometimes whether the belt is in a certain batching link possibly influencing the normal conveying or not in the production can also influence the high energy consumption caused by the material-free empty conveying of the belt conveyor. The existing solution is mainly to judge whether the belt conveying is broken or not by manually observing on site or detecting the weight on the belt by a belt scale.

The proximity switch is also called contactless proximity switch, which is a position switch that can be operated without mechanical direct contact with moving parts, when the sensing surface of the metal object proximity switch reaches the action distance, the switch can be actuated without mechanical contact and any pressure applied, thereby providing a switch command. The approach switch is a switch type sensor (i.e. a non-contact switch), has the characteristics of reliable action, stable performance, fast frequency response, long service life, strong anti-interference capability, water resistance, shock resistance, corrosion resistance and the like. The product has inductance type, capacitance type, Hall type, AC type and DC type. The automatic control system can be used as the links of limiting, counting, positioning control, automatic protection and the like. Normally open and normally closed types are commonly used, the normally open type: its switch is opened (off) when it is not touched and closed (on) when it is touched. A normally closed type: its switch is closed (on) when it is not touched and opened (off) when it is touched.

The time relay is a very important component in an electrical control system, and in many control systems, the time relay is required to realize time delay control. The time relay is an automatic control electric appliance which utilizes an electromagnetic principle or a mechanical action principle to delay the closing or the breaking of a contact. The time relay is used as an executive device in simple program control, starts timing after receiving a starting signal, and performs opening or closing action on a working contact after timing is finished, so that subsequent circuits are pushed to work. Generally, the delay performance of a time relay can be adjusted within a design range, so that the delay time of the time relay can be conveniently adjusted. The relay can not be closed in a delayed way only by one time relay, and is closed for a period of time and then opened, so that the relay is closed in a delayed way and then opened in a delayed way, but in general, the relay can be realized by configuring a certain number of time relays and intermediate relays.

Disclosure of Invention

The to-be-solved technical problem of the utility model is to traditional band conveyer expect the back absolutely, needs the people to inspect at the scene, perhaps learns the problem of expecting absolutely already by the data change of belt weigher, provides a band conveyer's disconnected material warning interlock.

The technical scheme of the utility model is that: a belt conveyor material-breaking alarm interlocking device is characterized in that a gantry support is made of steel bars on a support of a belt conveyor, and the top and the middle of the gantry support are connected with a plurality of steel bars in the backward horizontal direction; welding the tail ends of the steel bars backwards in the horizontal direction of the top by using angle irons; a normally closed proximity switch is arranged in the middle of the angle iron in a punching mode and connected with a time relay; connecting holes are formed in the middle parts of the two ends of the gantry support in the horizontal direction towards the tail ends of the rear steel bars, the connecting holes are horizontally consistent, a cross-shaped movable connecting rod penetrates through the connecting holes, a small iron block is welded to the top of the cross-shaped movable connecting rod, the proximity switch can sense the connection through the iron block, and the cross-shaped movable connecting rod can swing at any angle in the connecting holes; a light spring is arranged between the cross movable connecting rod and the middle upper part of the gantry support; the proximity switch and the top end of the cross movable connecting rod keep a distance of 3-5 mm.

The principle of the utility model is as follows: the proximity switch is arranged on the top angle iron and keeps a distance of 3-5mm with the top end of the cross movable connecting rod, and the proximity switch is connected with a time relay; the distance between the bottom of the cross movable connecting rod and the belt is kept to be 3cm, when no material passes through the belt, the cross movable connecting rod is restored to be kept in a state vertical to the belt under the action of the tensile force of the light spring, and the iron block at the top of the connecting rod can enable the proximity switch to output a switch-on signal within the sensing range of the proximity switch. When coal or material passes through the belt, the coal or material layer has a height and can provide a driving force for the movable connecting rod, so that the connecting rod overcomes the tension of the light spring to form an angle inclination, the iron block at the top of the connecting rod leaves the sensing distance of the proximity switch, and the proximity switch does not detect the iron block, thereby outputting a switch off signal. Because the proximity switch is connected with the time relay, the time relay is provided with a signal for switching on and delaying output, namely when the belt has no coal to walk, the connecting rod is perpendicular to the belt, and when the belt keeps for a plurality of seconds (such as 10 seconds), a switching-on signal is output, and the switching-on signal can trigger an alarm to give an alarm and can also be used as an interlocking signal to trigger the belt conveyor to stop.

The inventor points out that: so adopt a time relay because coal seam thickness on the belt is probably inhomogeneous, and the in-process of defeated material is because of the height on the bed of material, and is big time spent little during the driving force, and the cross connecting rod can be under the combined action of the thrust of light spring pulling force and material, and the swing back and forth is close to proximity switch often, keeps away from often, makes proximity switch-on state of disconnection often. In order to solve the problems, a proximity switch is connected with a time relay, a signal of the proximity switch is input into the time relay, and the time of delay output can be set on the time relay (according to the field working condition). For example, 10 seconds are set, namely the cross movable connecting rod can continuously turn on and off the proximity switch under the action of coal seam thrust, the time relay judges that the material on the belt is cut off only after the closing signals of the proximity switch to the time relay are consistent and keep more than 10 seconds, and at the moment, the time relay can output a turned-on alarm signal to an alarm or signal to unlock and stop the belt conveyor and other operations, so that the energy-saving effect is achieved. If the proximity switch gives the on signal of the time relay, the time relay is switched off in less than 10 seconds, and the time relay judges that the coal is not cut off, the alarm signal and the interlocking signal cannot be output.

The utility model discloses simple manufacture can extensively apply to likely defeated coal, defeated likepowder or graininess band conveyer such as fertilizer, makes operating personnel obtain the condition whether disconnected material on the belt feeder in real time, also can provide the interlocking contact, can realize disconnected material and stop interlocking functions such as belt feeder.

Drawings

FIG. 1 is a front view of the belt of the present invention;

FIG. 2 is a side view of the present invention in the absence of material;

fig. 3 is a side view of the present invention when in material.

In the figure: 1, a time relay; 2 a proximity switch; 3, a light spring; 4, a gantry support; 5, a cross movable connecting rod; 6 a conveyor belt.

Detailed Description

In order to achieve a better desulfurization effect, a thermoelectric device of a certain company performs a certain amount of in-furnace desulfurization, and therefore, it is necessary to mix a certain proportion of limestone with the furnace coal. The inlet of tragedy limestone is installed on a No. 1 coaling belt conveyor of a coaling system, a certain amount of limestone powder is added to coal conveyed to a coal conveying belt while coaling is carried out in the operation of the belt, however, the coal is often broken due to objective reasons (such as material blockage and the like) sometimes when the coal is fed into the No. 1 coaling belt, so that no coal is conveyed to the belt, but a machine for tragedy limestone cannot judge whether the coal is conveyed to the belt, and the machine for tragedy limestone or continuously adds limestone powder to the belt, so that excessive tragedy limestone distribution is caused, and the coal breakage is caused, so that production operators cannot timely find that the limestone is passed through a coal outlet, and finally the limestone is in an excessive amount for a long time, and the final proportioning proportion is unbalanced.

In order to avoid the problem, people must arrange to observe the coal on the belt in real time on site, and when the coal is cut off, the people manually stop a machine for preparing limestone and then deal with the coal blockage fault.

The company adopts the device of the utility model, a gantry support 4 is made of steel bars on the support of the belt conveyor, and the top and the middle part of the gantry support 4 are connected with a plurality of steel bars in the backward horizontal direction; welding the tail ends of the steel bars backwards in the horizontal direction of the top by using angle irons; a normally closed proximity switch 2 is arranged in the middle of the angle iron in a punching mode, and the proximity switch 2 is connected with a time relay 1; connecting holes are formed in the middle parts of the two ends of the gantry support in the horizontal direction towards the tail ends of the rear steel bars, the connecting holes are horizontally consistent, a cross-shaped movable connecting rod 5 penetrates through the connecting holes, a small iron block is welded to the top of the cross-shaped movable connecting rod 5, the proximity switch can sense the connection through the iron block, and the cross-shaped movable connecting rod can swing at any angle in the connecting holes; a light spring 3 is arranged between the cross movable connecting rod 5 and the middle upper part of the gantry support 4; the proximity switch 2 and the top end of the cross movable connecting rod 5 keep a distance of 3-5 mm.

When the coal on the coal conveying belt is cut off, the coal cutting condition of the belt conveyor can be detected in time, the audible and visual alarms on the site are respectively connected through signals output by the time relay to inform production operators that the coal cutting has occurred, and meanwhile, the signals can stop the operation of the limestone machine and stop the continuous addition of limestone. Therefore, the batching can be stopped in time, and production operators can find the coal breaking fault of the belt conveyor in time.

Claims

1. The utility model provides a belt conveyor expects warning interlock absolutely which characterized in that: the device is characterized in that a gantry support (4) is manufactured on a support of a belt conveyor by steel bars, and the top and the middle of the gantry support (4) are connected with a plurality of steel bars in the backward horizontal direction; welding the tail ends of the steel bars backwards in the horizontal direction of the top by using angle irons; a normally closed proximity switch (2) is arranged in the middle of the angle iron in a punching mode, and the proximity switch (2) is connected with a time relay (1); connecting holes are formed in the middle parts of the two ends of the gantry support in the horizontal direction towards the tail ends of the rear steel bars, the connecting holes are horizontally consistent, a cross movable connecting rod (5) penetrates through the connecting holes, a small iron block is welded to the top of the cross movable connecting rod (5), the proximity switch can sense through the iron block, and the cross movable connecting rod can swing at any angle in the connecting holes; a light spring (3) is arranged between the cross movable connecting rod (5) and the middle upper part of the gantry support (4); the distance between the proximity switch (2) and the top end of the cross movable connecting rod (5) is kept between 3 and 5 mm.