CN201694632U

CN201694632U - Chute blocking detector

Info

Publication number: CN201694632U
Application number: CN2010201744872U
Authority: CN
Inventors: 于丰; 李多雷; 沈文斌; 彭程; 李桉
Original assignee: Shenyang Engineering Technical Ltd Co Of National Coal
Current assignee: Shenyang Engineering Technical Ltd Co Of National Coal
Priority date: 2010-04-29
Filing date: 2010-04-29
Publication date: 2011-01-05
Anticipated expiration: 2020-04-29

Abstract

A chute blocking detector solves the problems that in the prior art, a capacitance is formed by a plate electrode encapsulated in epoxy resin and a chute wall, the malfunction of a sensor happens a lot, the prior art is vulnerable to the influence of the changes of environmental temperature and material type, and the manual adjustment of work parameter points according to environmental temperature and different materials is needed. The utility model is characterized in that the capacitance is formed by an elastic plate and a shell, an oscillation circuit is arranged in the shell and a control circuit is arranged in a control box, which consists of a monostable trigger circuit, a secondary integrator circuit, a pipe voltage reducing circuit, a comparator, a time-delay circuit, a reverse circuit, a relay and a light emitting diode. Compared with the prior art, the utility model has simple structure. The capacitance pressure sensor is openable door-type installation and provides convenience for the routine overhaul of a user. The control circuit in the control box can automatically adjust the work parameter points along with environment condition change and can not be influenced by material instant impact and collision. The reliability of products is greatly improved.

Description

A kind of chute stops up detector

Technical field

The utility model belongs to a kind of belt conveyer automatic checkout equipment that is used for, and particularly a kind of chute stops up detector.

Background technology

The sensor that is used for chute obstruction detecting device on the belt conveyer in the prior art, be generally the pressure sensor of gravity contact, this sensor is made up of offset plate, baffle plate and travel switch, when chute occurs stopping up to material contact offset plate, offset plate is subjected to displacement and promotes baffle plate and triggers travel switch and send jam signal.Can cause misoperation if this sensor at normal discharge process material collision offset plate takes place, in addition, this sensor is fragile under material impacts, and makes anti-block system lose measuring ability.In order to address this problem, open day is 1994 days 17, application (patent) number is that 93227923.6 patent application discloses a kind of " the induction type chute stops up detector ", it is that plate electrode and chute walls form electric capacity in the epoxy resin by being packaged in that this utility model induction type chute stops up detector, also cause the sensor misoperation easily if there is wet stock between plate electrode and chute walls, in addition, sensitive member is passive mechanical type, be subjected to the variable effect of ambient temperature and material variety very big, need carry out artificial adjusting work parameter point according to ambient temperature and different material, make detector adapt to varying environment temperature and different material, thereby use inconvenience.

Summary of the invention

Technical problem to be solved in the utility model is, overcomes the deficiencies in the prior art part, and a kind of shock resistance is provided, and is safe in utilization, can stop up detector with the chute of changes in environmental conditions automatic compensation working parameter point.

The technical solution adopted in the utility model comprises chute, capacitive pressure sensor is installed on chute side wall, by cable capacitive pressure sensor is connected with the control box that control circuit is installed, described capacitive pressure sensor has a metal base plate, on metal base plate, be connected with metal shell, a Jiao Gai is installed between metal base plate and metal shell, at metal shell inside face fitting insulating panels, between insulcrete and glue lid, the elasticity pole plate is installed, be provided with a bossing in described housing vertical centre line position lower end, this bossing has formed a circuit cavity with line outlet and connection jaws, in this circuit cavity, an insulated column of making of nylon material is installed by fix screw, wiring board that is used for sensor installation oscillating circuit electric elements of captive joint on insulated column, form the 8th capacitor C 8 by described elasticity pole plate and housing, integrated chip IC4 in the circuit board is installed, the 7th resistance R 7 and the 8th resistance R 8 and the 8th capacitor C 8 constitute oscillating circuit.

The described control circuit that is installed in the control box contains by the integrated chip IC1 and first resistance R 1, the single-shot trigger circuit that first capacitor C 1 and second capacitor C 2 constitute, the mouth of single-shot trigger circuit connects by second resistance R 2, the 3rd capacitor C 3, the second order product parallel circuit that the 3rd resistance R 3 and the 4th capacitor C 4 constitute, the second order product parallel circuit connects the positive input terminal of the comparator that is made of integrated chip IC2, pass through again by the first diode D1, the second diode D2, the 4th resistance R 4 is connected the negative input end of comparator with the tube voltage drop circuit that the 5th capacitor C 5 is formed, the mouth of comparator connects the time delay circuit that is made of the 5th resistance R 5 and the 6th capacitor C 6, the mouth of time delay circuit connects the negater circuit that is made of integrated chip IC3 and the 7th capacitor C 7, the mouth connection relay of negater circuit and the luminous warning circuit that is made of light-emitting diode D3 and the 6th resistance R 6 in parallel with relay.

Compared with prior art, the utility model is simple in structure, capacitive pressure sensor is that openable gate-type is installed, for user's regular maintenance provides convenience, control circuit in the control box can not be subjected to the influence of material moment impact and collision with changes in environmental conditions automatic compensation operation point, misoperation can not take place, and strong shock resistance is greatly improved reliability of products.

Description of drawings

Fig. 1 is a front view of the present utility model,

Fig. 2 is the utility model capacitive pressure sensor structural representation,

Fig. 3 is the utility model pressure sensor oscillating circuit constructional drawing,

Fig. 4 is the utility model control box inner control circuit constructional drawing.

Among the figure:

1. chute,

2. capacitive pressure sensor,

2-1 base plate .2-2. attaching screw, the 2-3 housing, 2-4 elasticity pole plate, the 2-5. insulcrete,

2-6. wiring board, the 2-7. seal joint, the 2-8. insulated column, the 2-9 fix screw,

2-10. pressing plate, 2-11. Jiao Gai,

3. cable,

4. control box,

4-1. single-shot trigger circuit, 4-2. second order product parallel circuit, 4-3. tube voltage drop circuit, 4-4. comparator, 4-5. time delay circuit, 4-6. negater circuit, 4-7. relay, the luminous warning circuit of 4-8.

The specific embodiment

As shown in Figure 1, the utility model comprises chute 1, and capacitive pressure sensor 2 is installed on chute 1 sidewall, by cable 3 capacitive pressure sensor 2 is connected with control box 4.

As shown in Figure 2, described capacitive pressure sensor 2 has a metal base plate 2-1, on metal base plate 2-1, be connected with metal shell 2-3 by attaching screw 2-2, a glue lid 2-11 is installed between metal base plate 2-1 and metal shell 2-3, at metal shell 2-3 inside face fitting insulating panels 2-5, between insulcrete 2-5 and glue lid 2-11, rubber-like copper metallic elastic pole plate 2-4 is installed, be provided with a bossing in described housing 2-3 vertical centre line position lower end, this bossing has formed a circuit cavity with line outlet and connection jaws, in this circuit cavity, an insulated column 2-8 who makes of nylon material is installed by fix screw 2-9, one of captive joint is used for the wiring board 2-6 of sensor installation oscillating circuit electric elements on insulated column 2-8, install one at described circuit cavity connection jaws end the circuit cavity played sealing process, play the pressing plate 2-10 of lead-in wire effect simultaneously, link to each other with elasticity pole plate 2-4 with fairlead on the insulcrete 2-5 by pressing plate 2-10 with wiring board 2-6 bonded assembly signal wire (SW), at described circuit cavity line outlet end seal joint 2-7 is installed, draws by seal joint 2-7 with wiring board 2-6 bonded assembly cable 3.

As shown in Figure 3, form the 8th capacitor C 8 by described elasticity pole plate 2-4 and housing 3, be installed in model on the wiring board 2-6 and be the integrated chip IC4 of SA555 and the 7th resistance R 7 and the 8th resistance R 8 and the 8th capacitor C 8 and constitute oscillating circuits, the rectangular wave Vx that is inversely proportional in mouth output frequency and the 8th capacitor C 8 of integrated chip IC4.

As shown in Figure 4, it is the SA555 integrated chip IC1 and first resistance R 1 that described control circuit contains by model, the single-shot trigger circuit 4-1 that first capacitor C 1 and second capacitor C 2 constitute, the mouth of single-shot trigger circuit 4-1 connects by second resistance R 2, the 3rd capacitor C 3, the second order product parallel circuit 4-2 that the 3rd resistance R 3 and the 4th capacitor C 4 constitute, it is the positive input terminal of the comparator 4-4 that constitutes of the integrated chip IC2 of LM2904 that second order product parallel circuit 4-2 connects by model, pass through again by the first diode D1, the second diode D2, the 4th resistance R 4 is connected the negative input end of comparator 4-4 with the tube voltage drop circuit 4-3 that the 5th capacitor C 5 is formed, the time delay circuit 4-5 that the output termination of comparator 4-4 is made of the 5th resistance R 5 and the 6th capacitor C 6, the output termination of time delay circuit 4-5 is the integrated chip IC3 of SA555 and the negater circuit 4-6 that the 7th capacitor C 7 constitutes by model, the output relay termination 4-7 of negater circuit 4-6 and the luminous warning circuit that is made of light-emitting diode D3 and the 6th resistance R 6 in parallel with relay 4-7.

During use, the utility model capacitive pressure sensor is installed on the vertical sidewall of chute, draw with the control box inner control circuit by seal joint with capacitive pressure sensor wiring board bonded assembly cable and to be connected, also can shock transducer when material is by chute under the normal circumstances, or even continuous impact, because the in-service time of impulsive force is very short, so can not cause jam signal.When material stops up, the cross component that material produces the Jiao Gai extruding continuingly acts on the capacitive pressure sensor, be used as when surpassing setting value with the time, changed the gap between elasticity pole plate and the housing, described oscillating circuit 2-6 output wave shape is changed, this signal is delivered to single-shot trigger circuit 4-1 through cable, at its mouth input high level unmodified square wave, obtaining galvanic current behind second order product parallel circuit 4-2 presses, send the positive input terminal of comparator 4-4, send the negative input end of comparator 4-4 again through tube voltage drop circuit 4-3, comparator 4-4 output low level is sent negater circuit 4-6 integrated chip input end after time delay circuit 4-5 time-delay, the mouth of integrated chip is a high level, the relay J action, light-emitting diode sends normal jam signal, and this signal will be retained to stop up always and be eliminated.

Claims

1. a chute stops up detector, comprise chute (1), on chute (1) sidewall, capacitive pressure sensor (2) is installed, by cable (3) capacitive pressure sensor (2) is connected with the control box that control circuit is installed (4), it is characterized in that, described capacitive pressure sensor (2) has a metal base plate (2-1), on metal base plate (2-1), be connected with metal shell (2-3), between metal base plate (2-1) and metal shell (2-3), a Jiao Gai (2-11) is installed, at metal shell (2-3) inside face fitting insulating panels (2-5), between insulcrete (2-5) and Jiao Gai (2-11), elasticity pole plate (2-4) is installed, be provided with a bossing in described housing (2-3) vertical centre line position lower end, this bossing has formed a circuit cavity with line outlet and connection jaws, in this circuit cavity, an insulated column (2-8) of making of nylon material is installed by fix screw (2-9), go up the wiring board (2-6) that one of captive joint is used for sensor installation oscillating circuit electric elements at insulated column (2-8), form the 8th capacitor C 8 by described elasticity pole plate (2-4) and housing (3), be installed in the integrated chip IC4 on the wiring board (2-6), the 7th resistance R 7 and the 8th resistance R 8 and the 8th capacitor C 8 constitute oscillating circuit.

2. stop up detector according to the described a kind of chute of claim 1, it is characterized in that, the described control circuit that is installed in the control box (4) contains by the integrated chip IC1 and first resistance R 1, the single-shot trigger circuit (4-1) that first capacitor C 1 and second capacitor C 2 constitute, the mouth of single-shot trigger circuit (4-1) connects by second resistance R 2, the 3rd capacitor C 3, the second order product parallel circuit (4-2) that the 3rd resistance R 3 and the 4th capacitor C 4 constitute, second order product parallel circuit (4-2) connects the positive input terminal of the comparator (4-4) that is made of integrated chip IC2, pass through again by the first diode D1, the second diode D2, the 4th resistance R 4 is connected the negative input end of comparator (4-4) with the tube voltage drop circuit (4-3) that the 5th capacitor C 5 is formed, the mouth of comparator (4-4) connects the time delay circuit (4-5) that is made of the 5th resistance R 5 and the 6th capacitor C 6, the mouth of time delay circuit (4-5) connects the negater circuit (4-6) that is made of integrated chip IC3 and the 7th capacitor C 7, the mouth connection relay (4-7) of negater circuit (4-6) and the luminous warning circuit (4-8) that is made of light-emitting diode D3 and the 6th resistance R 6 in parallel with relay (4-7).