CN211678189U

CN211678189U - Comprehensive anti-blocking device of double-geared roller crusher

Info

Publication number: CN211678189U
Application number: CN201922225328.4U
Authority: CN
Inventors: 徐莽; 杨耀霞; 张福; 白亮亮; 杨海东
Original assignee: Datong Coal Mine Group Co Ltd
Current assignee: Datong Coal Mine Group Co Ltd
Priority date: 2019-12-12
Filing date: 2019-12-12
Publication date: 2020-10-16
Anticipated expiration: 2029-12-12

Abstract

The utility model belongs to the technical field of the anti-blocking of double tooth roller crusher, specifically a double tooth roller crusher synthesizes anti-blocking device, has solved double tooth roller crusher's the technical problem that the card often takes place stifled, easy wearing and tearing. The following technical scheme is adopted: the double-tooth roller double-gear protection device comprises a mechanical protection part and a circuit protection part, wherein the mechanical protection part comprises shaft protection plates arranged at two end parts of a double-tooth roller in a surrounding manner; the circuit protection part comprises a main circuit and a control circuit, wherein the main circuit comprises a starting relay and a diode; the control circuit includes a time relay. The shaft protecting plate can control the coal receiving position of the double-tooth roller, so that the aim of mechanical protection of the double-tooth roller is fulfilled; effectively reduced stall protection circuit's spurious triggering, prevented that double tooth roller crusher from having a failure to stop for stall protection circuit is more accurate, has effectively ensured double tooth roller crusher safe and reliable operation, has ensured double tooth roller crusher to produce smoothly, has reduced the probability that maintainer does not have the use work, has saved manpower and materials.

Description

Comprehensive anti-blocking device of double-geared roller crusher

Technical Field

The utility model relates to a double tooth roller crusher prevents stifled card technical field, specifically is a double tooth roller crusher synthesizes anti-blocking device.

Background

The MMD-625 double-geared roller crusher is arranged in a coal preparation building, the double-geared roller crusher is positioned at the throat position of the whole mine raw coal lifting system, and once the double-geared roller crusher is blocked, the whole raw coal lifting system falls into paralysis. A stall protection circuit is arranged at a double-tooth roller of the MMD-625 type double-tooth roller crusher, the stall protection circuit comprises a first stall protection device 6 used for monitoring a main shaft and a second stall protection device 7 used for detecting a driven shaft, the first stall protection device 6 and the second stall protection device 7 respectively comprise a stall controller and a proximity switch (sensor) which are connected, when the stall protection circuit is powered on, a normally closed contact between a COM end and an N/C end of the stall controller is instantly changed into a normally open state, when the stall protection circuit detects that the main shaft or the driven shaft is abnormal, the COM end and the N/C end of the stall controller are instantly changed into the normally closed state, the double-tooth roller crusher is stopped within a time shorter than six seconds after receiving a signal, and the double-tooth roller crusher plays a role in protecting the double-tooth roller crusher, wherein the first stall protection device 6 and the second stall protection device 7 are all stall controllers with the models of Crouzet HSV84974320 And a proximity switch with the model number PEPEPEPEPRL FUCHS NBB8, wherein the COM end and the N/C end of the first stall protection device 6 or the second stall protection device 7 are both the COM end and the N/C end of the Crouzet HSV84974320 stall controller. In the trial run stage of the MMD-625 type double-toothed roller crusher, the operation condition is unsatisfactory, the conditions such as blocking and vibration are frequently generated at the double-toothed roller which mainly comprises a main shaft and a driven shaft, lump coal is inevitable to be generated, and the impact of large gangue on the double-toothed roller of the crusher, the stall protection circuit of the double-toothed roller crusher is too sensitive, the condition that the double-toothed roller crusher is stopped by false triggering is frequently generated, so that the accident that the crusher is stopped frequently occurs, and the maintainers need to consume manpower to find out the problem places, so that the normal operation of the coal dressing building is very unfavorable for the material resources of the coal dressing building, the smooth production of the coal dressing building is seriously influenced, and the coal mine production benefit is seriously influenced.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving the technical problem in the background art. Therefore, the utility model provides a double geared roller crusher synthesizes anti-blocking device.

The utility model provides a technical scheme that its technical problem adopted is:

a comprehensive anti-blocking device of a double-tooth roller crusher comprises a stall protection circuit, a mechanical protection part and a circuit protection part, wherein the mechanical protection part comprises shaft protection plates arranged at two end parts of a double-tooth roller in a surrounding manner, the shaft protection plates are arranged at the screwing sides of a main shaft and a driven shaft of the double-tooth roller, the shapes of the shaft protection plates are matched with those of the main shaft and the driven shaft, gaps for preventing coal blocks and gangue from being clamped are reserved between the shaft protection plates and the main shaft and between the shaft protection plates and the driven shaft, and one end part of the shaft protection plate positioned between the main shaft and the driven shaft at least extends to the position of a connecting line of the axes of the main shaft and the; the circuit protection part comprises a main circuit and a control circuit, wherein the main circuit comprises a starting relay and a diode, and a coil of the starting relay is connected with an external power supply after being connected with the diode in parallel; the control circuit comprises a time relay, a coil of the time relay is connected with a normally closed contact consisting of a COM end and an N/C end of a stall protection circuit in series to form a delay protection circuit, two ends of the delay protection circuit are connected to two ends of a positive electrode and a negative electrode of an external power supply, a normally open contact of a starting relay is connected between the delay protection circuit and the positive electrode of the external power supply in series, and two ends of the delay protection circuit are connected with a power supply end of a stall controller in the stall protection circuit; the passive normally open contact of the time relay is connected with the alarm indicator light loop in series, and the passive normally closed contact of the time relay is connected with the emergency stop loop of the double-geared roller crusher in series. The utility model discloses in the double teeth roller receive the coal position can be controlled to the protect axial sheet, reach the purpose to double teeth roller mechanics protection. After the shaft protecting plate is installed, impact of lump coal and massive gangue on the double-tooth rollers of the crusher is well solved, abrasion of the double-tooth rollers is avoided, the service life of the double-tooth-roller crusher is prolonged, the accident rate of the double-tooth-roller crusher is reduced, and safe and reliable operation of the double-tooth-roller crusher is guaranteed. The electric protection part has set up time relay and start relay, has effectively reduced stall protection circuit's spurious triggering, prevents that double tooth roller crusher from having the accident to park for stall protection circuit is more accurate, has effectively ensured double tooth roller crusher safe and reliable operation, has ensured double tooth roller crusher to produce smoothly, has reduced the probability that maintainer does the idle work, has saved manpower and materials.

Wherein, the working principle of the electric protection part is as follows: when the crusher equipment is started, an operation signal is sent to the PLC control cabinet, the PLC control cabinet controls a coil of the starting relay to be connected with an external power supply, the coil of the starting relay is attracted, a normally open contact of the starting relay is closed, the external power supply supplies power to the stall protection circuit, a stall controller of a first stall protection device and a stall controller of a second stall protection device in the stall protection circuit are powered on, and a normally closed contact formed by a COM end and an N/C end of the stall controller is in a normally open state, so that the delay protection circuit is disconnected; the stall controllers supply power to respective proximity switches, the first stall protection device and the second stall protection device work normally, the proximity switches of the first stall protection device and the second stall protection device respectively detect signals of each rotation of the main shaft and the auxiliary shaft and feed back signals to the stall controllers of the first stall protection device or the second stall protection device uninterruptedly, when the feedback signals from any shaft of the main shaft or the auxiliary shaft disappear, the COM end and the N/C end of the stall controller of the corresponding shaft are instantly changed into a normally closed state from a normally open state when the power supply is switched on, the delay protection circuit is switched on, after a coil of a time relay in the delay protection circuit is powered on, the time relay acts according to the set delay time, after the time relay reads the delay time, a passive normally open contact of the time relay is closed, and an alarm indicator lamp circuit is switched on, the function of alarm indication is achieved; the passive normally closed contact of the time relay is disconnected, the emergency stop circuit of the double-geared roller crusher is disconnected, and the double-geared roller crusher stops running.

The utility model has the advantages that: the utility model provides a comprehensive anti-blocking device of a double-geared roller crusher, which comprises a mechanical protection part and an electrical appliance protection part, wherein the mechanical protection part is mainly provided with shaft protection plates at two ends of a double-geared roller, and the shaft protection plates can control the coal receiving position of the double-geared roller so as to achieve the purpose of mechanical protection of the double-geared roller; after the shaft protecting plate is installed, the impact of lump coal and large gangue on the double-tooth roller of the crusher is effectively solved, and the abrasion of the double-tooth roller is avoided; the electric protection part is provided with a time relay for an original stall protection circuit, the stall protection reaction time is prolonged in a certain range, the phenomenon that the temperature of a working medium of a hydraulic coupler rises instantly after stalling and a large amount of lump coal enters a crusher to cause serious blockage of the crusher can be avoided, the false triggering of the stall protection circuit is effectively reduced, the double-tooth-roller crusher is prevented from stopping without accident, the stall protection circuit is more accurate, the safe and reliable operation of the double-tooth-roller crusher is effectively guaranteed, the smooth production of the double-tooth-roller crusher is guaranteed, and the probability of idle work of maintainers is reduced; the accident probability of the double-geared roller crusher is reduced, the safe and reliable operation of the double-geared roller crusher is guaranteed, the smooth production and operation of the coal preparation building are effectively guaranteed, the production cost is reduced, financial resources, material resources and manpower are saved, and higher economic value is brought.

Drawings

FIG. 1 is a schematic structural view of a shaft guard plate of the present invention;

fig. 2 is a schematic circuit diagram of the electrical protection part of the present invention.

In the figure: 1-a shaft protecting plate; 2-double toothed rolls; 3-starting a relay; 4-a diode; 5-a time relay; 6-a first stall protection device; 7-a second stall protection device; 8-rib plate.

Detailed Description

Referring to fig. 1 to 2, the comprehensive anti-blocking device of the double-geared roller crusher of the present invention will be described in detail.

A comprehensive anti-blocking device of a double-tooth roller crusher comprises a stall protection circuit, a mechanical protection part and a circuit protection part, wherein the mechanical protection part comprises shaft protection plates 1 which are arranged at two end parts of a double-tooth roller 2 in a surrounding manner, the shaft protection plates 1 are arranged at the screwing-in sides of a main shaft and an auxiliary shaft of the double-tooth roller 2, the shape of the shaft protection plates 1 is matched with the shapes of the main shaft and the auxiliary shaft, gaps for preventing coal blocks and gangue from being clamped are reserved between the shaft protection plates 1 and the main shaft and between the shaft protection plates and the auxiliary shaft, and one end part of the shaft protection plate 1 positioned between the main shaft and the auxiliary shaft at least extends to the position of a connecting line of the axes of the; the circuit protection part comprises a main circuit and a control circuit, the main circuit comprises a starting relay 3 and a diode 4, and a coil of the starting relay 3 is connected with an external power supply after being connected with the diode 4 in parallel; the control circuit comprises a time relay 5, a coil of the time relay 5 is connected with a normally closed contact consisting of a COM end and an N/C end of a stall protection circuit in series to form a delay protection circuit, two ends of the delay protection circuit are connected to two ends of a positive electrode and a negative electrode of an external power supply, a normally open contact of a starting relay 3 is connected between the delay protection circuit and the positive electrode of the external power supply in series, and two ends of the delay protection circuit are connected with a power supply end of a stall controller in the stall protection circuit; the passive normally open contact of the time relay 5 is connected with an alarm indicator light loop in series, and the passive normally closed contact of the time relay 5 is connected with an emergency stop loop of the double-geared roller crusher in series.

In the concrete implementation, use 16mm steel sheet processing curved axle board 1 and main shaft and from the axle adaptation, the width of protecting axle board 1 is 70mm, the utility model discloses in protect axle board 1 can control double-toothed roller 2 receive the coal position, reach the purpose to double-toothed roller 2 mechanics protection. After the shaft protecting plate 1 is installed, impact of lump coal and large gangue on the double-tooth roller 2 of the crusher is well solved, abrasion of the double-tooth roller 2 is avoided, the service life of the double-tooth roller crusher is prolonged, the accident rate of the double-tooth roller crusher is reduced, and safe and reliable operation of the double-tooth roller crusher is guaranteed. As shown in fig. 1, one end of the shaft protecting plate 1 between the main shaft and the driven shaft extends to at least the axis connecting line position of the main shaft and the driven shaft, because the main shaft and the driven shaft are both cylindrical, and the axis connecting line position of the main shaft and the driven shaft is the shortest distance position during the rotation process, and then when the main shaft and the driven shaft rotate outwards, the distance between the outer surface of the main shaft and the driven shaft becomes larger and larger, and the main shaft and the driven shaft enter an outward rotation state, even though gangue and coal blocks fall in, the gangue and the coal blocks are thrown out by the main shaft and the driven shaft. The electric protection part is mainly that time relay 5 and start-up relay 3 have been increased on the stall protection circuit's of the double tooth roller crusher of MMD-625 type basis, the false triggering of stall protection circuit has effectively been reduced, prevent that the double tooth roller crusher from having the accident to park, make the stall protection circuit more accurate, effectively ensured double tooth roller crusher safe and reliable operation, ensured the smooth production of double tooth roller crusher, reduced the probability that maintainer does the idle work, manpower and materials have been saved.

Wherein, the working principle of the electric protection part is as follows: when the crusher equipment is started, an operation signal is sent to the PLC control cabinet, the PLC control cabinet controls a coil of the starting relay 3 to be connected with an external power supply, the coil of the starting relay 3 is attracted, a normally open contact of the starting relay 3 is closed, the external power supply supplies power to the stall protection circuit, stall controllers of a first stall protection device 6 and a second stall protection device 7 in the stall protection circuit are powered on, and a normally closed contact composed of a COM end and an N/C end of the stall controller is in a normally open state, so that the delay protection circuit is disconnected; the stall controllers supply power to respective proximity switches, the first stall protection device 6 and the second stall protection device 7 work normally, the proximity switches of the first stall protection device 6 and the second stall protection device 7 detect signals of each rotation of the main shaft and the auxiliary shaft respectively and feed back signals to the stall controllers of the first stall protection device 6 or the second stall protection device 7 uninterruptedly, when the feedback signals from any shaft of the main shaft or the auxiliary shaft disappear, the COM end and the N/C end of the stall controller of the corresponding shaft are instantly changed into a normally closed state from a normally open state when the power supply is switched on, the delay protection circuit is switched on, after a coil of a time relay 5 in the delay protection circuit is electrified, the time relay 5 acts according to set delay time, after the time relay 5 reads the delay time, a passive normally open contact of the time relay 5 is closed, the alarm indicator lamp loop is connected to play a role in alarm indication; the passive normally closed contact of the time relay 5 is disconnected, the emergency stop circuit of the double-geared roller crusher is disconnected, and the double-geared roller crusher stops running. The time for determining whether the double-tooth roller has a fault can be further prolonged by adding the time relay 5, so that the stall protection accuracy is improved, in the specific implementation, the delay time of the time relay 5 is set to be 2 seconds, 4 seconds or 6 seconds, preferably, the delay time of the time relay 5 is set to be 4 seconds, then the original reaction time of the stall protection circuit is added, the fault detection time of the double-tooth roller crusher is prolonged to be within 10 seconds, the stall protection circuit can be prevented from being triggered by mistake to the maximum extent, the double-tooth roller can be effectively protected, the phenomenon that the double-tooth roller is blocked for too long time is avoided, and the phenomenon that the temperature of a working medium of a hydraulic coupler is increased instantly to spray liquid and a large amount of lump coal enters the crusher to cause serious blockage of the crusher after the blockage is avoided; the service life of the double-geared roller crusher is prolonged, the accident probability of the double-geared roller crusher is reduced, and the safe and reliable operation of the double-geared roller crusher is ensured.

Further, as a double geared roller crusher synthesize and prevent stifled concrete implementation who clamps the device, as shown in fig. 1, protect axial plate 1 to divide into the several part and enclose respectively and establish to the periphery of main shaft and from the axle. In the double-geared roller crusher of the MMD-625 type, the rotation directions of the main shaft and the sub-shaft are opposite, so the double-geared roller 2 can be divided into a rotation-in side and a rotation-out side, for example, if the rotation directions of the main shaft and the sub-shaft are as shown in fig. 1, the rotation-in side of the main shaft and the sub-shaft is a range of nine o ' clock to three o ' clock in the clockwise direction of the main shaft and the sub-shaft, and if the rotation directions of the main shaft and the sub-shaft are opposite to that shown in fig. 1, the rotation-in side of the main shaft and the sub-shaft is a range of three o ' clock; the shaft protection plate 1 is arranged on the rotating side, so that the main shaft and the driven shaft can be effectively prevented from being wound with stones and coal blocks into the double-tooth rollers 2 in the rotating process, the effect of protecting the double-tooth rollers 2 is achieved, a gap is reserved between the shaft protection plate 1 and the main shaft and between the driven shaft, and the gap is small enough to prevent the stones, the coal blocks and the gangue from falling into the double-tooth rollers 2. For the convenience of installation, the shaft protecting plate 1 is provided with a plurality of blocks which respectively surround the peripheries of the main shaft and the driven shaft.

Further, as a double gear roller crusher synthesize and prevent stifled concrete implementation mode who clamps the device, as shown in fig. 1, protect axial plate 1 to fix on the quick-witted case around double gear roller 2 through gusset 8.

While the invention has been particularly shown and described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a double geared roller crusher synthesizes anti-blocking device, includes stall protection circuit, its characterized in that: the double-tooth roller type coal mine underground coal mine; the circuit protection part comprises a main circuit and a control circuit, the main circuit comprises a starting relay (3) and a diode (4), and a coil of the starting relay (3) is connected with an external power supply after being connected with the diode (4) in parallel; the control circuit comprises a time relay (5), a coil of the time relay (5) is connected with a normally closed contact consisting of a COM end and an N/C end of a stall protection circuit in series to form a delay protection circuit, two ends of the delay protection circuit are connected to two ends of a positive electrode and a negative electrode of an external power supply, a normally open contact of a starting relay (3) is connected between the delay protection circuit and the positive electrode of the external power supply in series, and two ends of the delay protection circuit are connected with a power supply end of a stall controller in the stall protection circuit; the passive normally open contact of the time relay (5) is connected with the alarm indicator light loop in series, and the passive normally closed contact of the time relay (5) is connected with the emergency stop loop of the double-geared roller crusher in series.

2. The comprehensive anti-blocking device of the double-geared roller crusher as claimed in claim 1, wherein: the shaft protecting plate (1) is divided into a plurality of parts which are respectively arranged around the periphery of the main shaft and the driven shaft.

3. The comprehensive anti-blocking device of the double-geared roller crusher as claimed in claim 2, wherein: the shaft protecting plate (1) is fixed on the machine case around the double-tooth roller (2) through a rib plate (8).