CN205932836U - Lift with solenoid valve - Google Patents

Abstract

The utility model discloses a lift with solenoid valve, which comprises a housing, the lower part of casing is provided with pneumatic cylinder, sprocket mechanism and by pneumatic cylinder, sprocket mechanism driven elevating gear, elevating gear's right side and cargo bed fixed connection to it goes up and down to drive cargo bed, sprocket mechanism includes a sprocket and a chain, the sprocket shaft is located on the piston rod of pneumatic cylinder, the sprocket is walked around to the chain, the first end of chain with elevating gear connects, second end with the casing is connected, meet an oil pipe on the advancing of pneumatic cylinder, the oil -out the last magenetic exchange valve that connects of oil pipe, oil pipe and oil pump connection, casing upper portion is provided with control switch, control switch constitutes control circuit with the solenoid valve. The utility model discloses nevertheless occupation space is little, and convenient little place light grade material goes up and down, and its material lift platform direct mount improves work efficiency greatly on the horizontal plane moreover.

Description

A kind of elevator with electromagnetic valve

Technical field

This utility model is related to a kind of elevator with electromagnetic valve.

Background technology

Conventional elevator platform is all mounted in the groove of ground level, is difficult the hygiene of the food enterprises, and And its installation area occupied is excessive, is unfavorable for that little space light grade place is installed, does not more crucially solve in lifting process Automatically the difficult problem stopping, material descending operation is comparatively laborious.

Utility model content

The purpose of this utility model is to provide a kind of elevator with electromagnetic valve, and it can solve on of the prior art State shortcoming, provide a kind of take up room little, facilitate the lifting of little place light grade material, dependable performance and be easy to maintenance operation Elevator.

This utility model employs the following technical solutions：

A kind of elevator with electromagnetic valve, including casing, the bottom of described casing be provided with hydraulic cylinder, chain-wheel mechanism and The lowering or hoisting gear being driven by hydraulic cylinder, chain-wheel mechanism, the right side of described lowering or hoisting gear is fixedly connected with load bed, to drive load bed liter Fall；Described chain-wheel mechanism includes a sprocket wheel and a chain, described sprocket shaft on the piston rod of described hydraulic cylinder, described chain Bypass sprocket wheel, the first end of chain is connected with described lowering or hoisting gear；Second end is connected with described casing；The entering of described hydraulic cylinder, One oil pipe is connect on oil-out, a solenoid directional control valve is connect on described oil pipe, described oil pipe is connected with oil pump；Portion on the housing It is provided with controlling switch；Described controlling switch constitutes control loop with electromagnetic valve；Described electromagnetic valve includes valve seat, sleeve pipe, valve port Part and the core iron positioning element with core iron locating surface；The two ends of described valve seat offer respectively and install the first of described sleeve pipe Installing hole, and the second installing hole of described valve port part is installed；Described core iron positioning element and described valve seat are Split type structure, and It is connected with described valve seat or described sleeve pipe.

Described core iron positioning element is connected with described sleeve pipe, and the bottom of described sleeve pipe is provided with the bending of inside lateral bend Portion, described bending section forms described core iron positioning element, and the top surface of described bending section forms described core iron locating surface.

Described controlling switch includes a control circuit, and described control circuit includes：

One electric capacity, is electrically connected to a power end；One resistance, with this capacitances in series；

Bypass switch, with this resistor coupled in parallel；And

One front device, in order to provide at least one operating control signal to a motor, and sets time delay according to one, produces Raw at least one delayed control signal, to this by-pass switch, makes this by-pass switch turn on, so that this resistive short.

This by-pass switch is a pass-transistor, and this pass-transistor includes a drain electrode, a source electrode and a grid, this drain electrode And this source electrode and this resistor coupled in parallel, at least one delayed control signal described in the reception of this grid.

The utility model has the advantages that：Not only take up room little, facilitate the light grade material lifting of little place, and its material Hoistable platform is mounted directly in the horizontal plane, facilitates daily hygiene to clean, and meets food hygiene cleaning and requires.More importantly thing After material rises to specified location, after setting time terminates, hoistable platform is automatically performed decline, convenient operation, also greatly improves Work efficiency.

Brief description

With reference to embodiment and accompanying drawing, this utility model is described in detail, wherein：

Fig. 1 is structural representation of the present utility model.

Fig. 2 is the structural representation of the electromagnetic valve of Fig. 1.

Fig. 3 is the circuit diagram of control circuit of the present utility model.

Specific embodiment

Of the present utility model specific embodiment is expanded on further below in conjunction with the accompanying drawings：

As shown in figure 1, a kind of elevator with electromagnetic valve, including casing 5, the bottom of casing 5 is provided with a hydraulic pressure Cylinder 9 and chain-wheel mechanism and the lowering or hoisting gear 21 being driven by hydraulic cylinder 9, chain-wheel mechanism.Chain-wheel mechanism includes sprocket wheel 8 and chain 7, chain Take turns that 8 axles are located on the piston shaft of hydraulic cylinder 9 and sprocket wheel 8 can rotate around its center.Chain 7 bypasses sprocket wheel 8, its first end 22 with Lifting support 11 in lowering or hoisting gear 21 connects, and the second end 23 is connected with casing 5.So when the piston shaft of hydraulic cylinder 9 lifts, Lowering or hoisting gear 21 just can be driven to be lifted by sprocket wheel 8 and chain 7.Lowering or hoisting gear 21 includes lifting support 11, pulley 10 And lifter plate 12, pulley 10 is arranged on lifting support 11, rolls and carries out oscilaltion along the track 6 being located in casing 5； Lifter plate 12 is fixedly connected with lifting support 11, lifts with the lifting of lifting support 11；Load bed 14 is fixedly connected with lifter plate, So lifter plate 12 just can drive load bed 14 to lift in lifting process.

Hydraulic cylinder 9 be connected with an oil pipe 15 into and out of on hydraulic fluid port 17,16, a solenoid directional control valve 19, oil pipe are connect on oil pipe 15 15 are connected with oil pump (not shown).Casing top is provided with controlling switch, controlling switch includes scram button 1, rises Button 2, stop button 3 and decline button 4 and a control circuit, rise button 2, facilitate manual operation material to rise；Rising is pressed It is off button 3 below button 2, run to stopping operation manually after specified location for material；The decline of stop button 3 lower section Button 4 is used for the decline process of manual operation material.Built with relay, control material rises to specified location stop and sets casing After fixing time, hoistable platform declines automatically, it is to avoid the unexpected wait declining, also reducing subsequent operation simultaneously during material handling Time is it is ensured that improve labor efficiency while safety again.

In order to prevent load bed from rushing to summit and stop in time when landing, the bottom of casing 5 and top are provided with upper limit sensing and open Close 20 and lower limit inductive switch 13, upper limit inductive switch 20, lower limit inductive switch 13 are touched by lifter plate 12, scram button 1, on Rise button 2, stop button 3, decline button 4, upper limit inductive switch 20, lower limit inductive switch 13 and electromagnetic valve 19 composition control Loop.

During cargo transport, this elevator adopts hydraulic pressure as the power moving up and down, and provides high pressure by extraneous oil pump station Oil.Hydraulic oil through reversal valve, unidirectional regulating valve by oil inlet pipe 15 send into hydraulic cylinder so that the piston shaft in hydraulic cylinder is increased and Decline work.When opening the rising button 2 of elevator (solenoid directional control valve ascent direction is started working), oil-in 17 oil-feed, Piston shaft rises and promotes load bed 14 to rise, now oil-out 16 oil return, and this oil returns to pump through solenoid directional control valve and oil pipe Stand；When opening elevator down switch button 4, (solenoid directional control valve descent direction is started working) oil-out 16 oil-feed promotes goods Platform 14 declines, and now oil-in 17 is fuel-displaced, defines a contrary flow direction, and the oil return pipe that this oil also passes through reversal valve returns to pump Stand, raising and lowering works repeatedly successively.

When starting rising button 2, extraneous oil pump station provides hydraulic oil to hydraulic cylinder 9, and now, hydraulic oil changes through electromagnetism To valve 19, unidirectional regulating valve sends into hydraulic cylinder makes the piston shaft in hydraulic cylinder play the effect of rising, the piston shaft of hydraulic cylinder 9 this When start to carry movable sprocket 8 slowly to rise, due to being connected of chain 7 one end and lifting support 11, so chain 7 also drives simultaneously Lifting support 11 moves upwardly together, thus driving load bed 14 to move together.

When rising to setting height, lifter plate 12, close to upper limit inductive switch 20, makes upper limit inductive switch 20 close electricity Magnetic reversal valve, opens fall time relay simultaneously, rises and stops；When stopping to the time setting, solenoid directional control valve (passes through Fall time relay) automatically open up (solenoid directional control valve descent direction) and begin to decline, when drop to setting low when, decline Limited block declines stopping close to stopping inductive switch (closing solenoid directional control valve descent direction).Press again and once rise button 2 and recover Working condition ibid.

As shown in Fig. 2 electromagnetic valve includes valve seat 1901, sleeve pipe 1902, valve port part 1903 and has core iron locating surface 1941 core iron positioning element 1904；The two ends of described valve seat 1901 offer the first installation installing described sleeve pipe 1902 respectively Hole, and the second installing hole of described valve port part 1903 is installed；Described core iron positioning element 1904 and described valve seat 1901 are to divide Body structure, and be connected with described valve seat 1901 or described sleeve pipe 1902.Described core iron positioning element 1904 and described sleeve pipe 1902 connections.The bottom of described sleeve pipe 1902 is provided with the bending section of inside lateral bend, and it is fixed that described bending section forms described core iron Position part 1904, the top surface of described bending section forms described core iron locating surface 1941.Described sleeve pipe 1902 is stretching casing tube, described The bottom of stretching casing tube is provided with the extension section of inside side stretching, and described extension section forms described bending section.Described core iron positioning Part 1904 is pad, and described pad is connected to the inner side of described sleeve pipe 1902 bottom, and the top surface of described pad forms described Core iron locating surface 1941.Described pad is connected to the inner side of described sleeve pipe 1902 bottom by laser welding.Described core iron is fixed Position part 1904 is connected with described valve seat 1901.Described core iron positioning element 1904 is pad, described pad and described valve seat 1901 rivetings, the top surface of described pad forms the lower end of the first installing hole place valve seat location described in described core iron locating surface 1941 Portion is provided with caulking part, and described pad is riveted with described caulking part.Described electromagnetic valve also includes core iron part, described core iron part bag Include core iron 1905 and sealing-plug 1906, described core iron 1905 is provided with the self poisoning face with the cooperation of described core iron locating surface 1941, The distance between described self poisoning face 1951 and sealing surface of described sealing-plug 1906 more than described core iron locating surface 1941 with The distance between valve port 1931 end face of described valve port part 1903.The core iron positioning element of electromagnetic valve of the present utility model and valve Seat is Split type structure, that is, core iron positioning element is not directly to open up on valve seat, thus described first installing hole and the second peace Dress hole can all be formed from same one end processing of described valve seat, just can be machined by one procedure, thus the first installing hole And second the axiality between installing hole be guaranteed, and then can ensure that the axiality of core iron part and valve port, thus Reduce the probability that valve occurs internal hemorrhage due to trauma, improve its sealing property, extend its service life.Additionally, being provided with the core of core iron locating surface Ferrum positioning element and valve seat are Split type structure, and this core iron positioning element can select and valve seat or telescopic joint, thus core iron Locating surface is not to open up on valve seat, thus by the size of the associated components such as control valve mouthpiece and valve base part, just controlled Coremaking definitely plane and the range accuracy of valve port.Electromagnetic valve can effectively ensure that core iron part is fixed with the axiality of valve port and core iron The range accuracy of plane and valve port, thus improve the sealing property of valve it is ensured that its service life.

As shown in figure 3, control circuit includes：One electric capacity, is electrically connected to a power end；One resistance, with this capacitances in series；One By-pass switch, with this resistor coupled in parallel；And a front device, in order to provide at least one operating control signal to a motor, and foundation One sets time delay, produces at least one delayed control signal to this by-pass switch, so that this by-pass switch is turned on, so that this resistance Short circuit.This by-pass switch is a pass-transistor, and this pass-transistor includes a drain electrode, a source electrode and a grid, this drain electrode and This source electrode and this resistor coupled in parallel, at least one delayed control signal described in the reception of this grid.Described circuit for controlling motor is another to include one First fairing, is connected between this front device and this by-pass switch, in order at least one delayed control signal described in rectification. This first fairing includes two commutation diodes, a commutation capacitor and a dead resistance, and described two commutation diodes receive two Delayed control signal, this commutation capacitor and this dead resistance are in parallel, and connect to the negative electrode of described two commutation diodes.This resistance Resistance value be 10 ohm to 100 ohm between.Described circuit for controlling motor is another to include four switching switches, described four switchings Switch connects this motor, and at least one operating control signal described in receiving.Described at least one delayed control signal with partly described At least one operating control signal is identical.Described circuit for controlling motor is another to include one second fairing, its be connected to this electric capacity and Between this power end.Described circuit for controlling motor is another to include one the 3rd fairing and a mu balanced circuit, described 3rd rectification dress Put and described mu balanced circuit is connected between this front device and this power end.By-pass switch 33 is a pass-transistor, by this Road transistor includes a drain electrode, a source electrode and a grid, and this drain electrode and this source electrode 332 are in parallel with this resistance 32, and this grid 333 connects Receive at least one delayed control signal S5, S6.Also include one first fairing 36, be connected to this front device 34 and this bypass is opened Close between 33, in order to rectification at least a delayed control signal S5, S6.In one embodiment, this first fairing 36 includes two An individual commutation diode 361,362, commutation capacitor 363 and a dead resistance 364, two commutation diodes 361,362 receive two Individual delayed control signal S5, S6, this commutation capacitor 363 and this dead resistance 364 are in parallel, and this commutation capacitor 363 and this rectification One end of resistance 364 connects to the negative electrode of two commutation diodes 361,362, this commutation capacitor 363 and this dead resistance 364 The other end is grounded.Also include four switching switches 371,372,373,374, connect this motor 35, four switching switches 371, 372nd, 373,374 receive operating control signal S1-S4 respectively.In one embodiment, four switching switches 371,372,373,374 Can be switching transistor, its grid is to be controlled by operating control signal S1-S4, with control switching transistor conducting whether, and Control the operating of this motor 35.Delayed control signal S5, S6 are identical with part operating control signal S1, S2, that is, this preposition dress Put 34 after this setting time delay, also produce operating control signal S1, S2.Therefore, delayed control signal S5, S6 can share fortune Turn control signal S1, S2, with control this by-pass switch 33 conducting whether.Including one second fairing 38, it is connected to this electricity Hold between 31 and this power end VCC.This second fairing 38 includes two commutation diodes 381,382.Motor control of the present invention Circuit processed is another to include one the 3rd fairing and a mu balanced circuit, is connected between this front device 34 and this power end VCC, with There is provided stabilized power source to this front device 34.In one embodiment, this front device 34 can be a pre-driver integrated circuit Or microcontroller (MCU) (IC).Circuit for controlling motor of the present invention is another to include a position element and a protection device.Do not show in figure Show the 3rd fairing, the component of this mu balanced circuit, this position element and this protection device.Using resistance and this electric capacity Series connection, can suppress power supply to turn on the current spikes of moment.After this by-pass switch and this resistor coupled in parallel, and power supply stable state, make The conducting short circuit of this by-pass switch, makes electric capacity will not be affected by this resistance, can maintain filter effect without producing noise.

The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all this Any modification, equivalent and improvement made within the spirit of utility model and principle etc., should be included in this utility model Protection domain within.

Claims (3)

1. a kind of elevator with electromagnetic valve, including casing it is characterised in that the bottom of described casing be provided with hydraulic cylinder, Chain-wheel mechanism and the lowering or hoisting gear being driven by hydraulic cylinder, chain-wheel mechanism, the right side of described lowering or hoisting gear is fixedly connected with load bed, with Drive load bed lifting；Described chain-wheel mechanism includes a sprocket wheel and a chain, and described sprocket shaft is located at the piston rod of described hydraulic cylinder On, described chain bypasses sprocket wheel, and the first end of chain is connected with described lowering or hoisting gear；Second end is connected with described casing；Described Hydraulic cylinder an oil pipe is connect into and out of on hydraulic fluid port, a solenoid directional control valve is connect on described oil pipe, described oil pipe is connected with oil pump；? Described casing top is provided with controlling switch；Described controlling switch constitutes control loop with electromagnetic valve；Described electromagnetic valve includes valve Seat, sleeve pipe, valve port part and the core iron positioning element with core iron locating surface；The two ends of described valve seat offer installation institute respectively State the first installing hole of sleeve pipe, and the second installing hole installing described valve port part；Described core iron positioning element and described valve seat For Split type structure, and it is connected with described valve seat or described sleeve pipe, described controlling switch includes a control circuit, and described control Circuit includes：

One electric capacity, is electrically connected to a power end；One resistance, with this capacitances in series；

Bypass switch, with this resistor coupled in parallel；And

One front device, in order to provide at least one operating control signal to a motor, and according to one setting time delay, produce to A few delayed control signal, to this by-pass switch, makes this by-pass switch turn on, so that this resistive short.

2. the elevator with electromagnetic valve according to claim 1 it is characterised in that described core iron positioning element with described Telescopic joint, the bottom of described sleeve pipe is provided with the bending section of inside lateral bend, and described bending section forms described core iron location division Part, the top surface of described bending section forms described core iron locating surface.

3. the elevator with electromagnetic valve according to claim 2 is it is characterised in that this by-pass switch is a bypass crystal Pipe, this pass-transistor includes a drain electrode, a source electrode and a grid, this drain electrode and this source electrode and this resistor coupled in parallel, and this grid connects At least one delayed control signal described in receipts.