CN2048422U

CN2048422U - Micro electromagnetic shaking table

Info

Publication number: CN2048422U
Application number: CN 88215868
Authority: CN
Inventors: 沈六如; 刘成昌; 王吉霖
Original assignee: Suzhou Research Inst Of Concrete Cement Products State Bureau Of Building Mate
Current assignee: Suzhou Research Inst Of Concrete Cement Products State Bureau Of Building Mate
Priority date: 1988-11-05
Filing date: 1988-11-05
Publication date: 1989-11-29

Abstract

The utility model discloses a micro electromagnetic shaking table belonging to the field of concrete test and implements production. The electromagnetic shaking table mainly comprises an electromagnet, a rubber spring, a guide rod, a hanger rod, a regulating wheel, a rectifying circuit, etc. When electric current is input, firstly, half-wave rectification is passed, when in conduction, a suction force is generated by the electromagnet, and the rubber spring is compressed by the electromagnet; when in non-conduction, the suction force of the electromagnet disappears, the rubber spring extends, making the vibration brought about, and the vibration is transferred to a table face by the hanger rod. The utility model has the advantages of small size, light weight, low cost, convenient operation, simple repair, power consumption saving, continuous and adjustable amplitude of the table face, etc. The utility model can be used as the vibrating tight molding of the concrete test block.

Description

Micro electromagnetic shaking table

The utility model belongs to concrete test and machine for producing tool field.

Advantages such as common motor machine shake table is generally adopted in the closely knit moulding of concrete test block, and the motor machine shake table has dependable performance, and exciting force is big, but it is big also to exist the equipment steel consumption, and the cost height is moved inconvenience, and energy consumption is big, and the table top amplitude is inhomogeneous, and shortcoming such as noise is bigger.Commercially available a kind of electromagnetism mini vibrator is used for the closely knit moulding of concrete surface.By electromagnet, push rod (suspension rod), power switch, adjusting device, vibrating bottom plate and shell are formed, and after vibrator was connected power supply, electromagnet began vibration, passes to base plate by push rod, causes the vibration of whole of base plate.The amplitude of base plate can change by adjusting device.During use, base plate is close to concrete surface, the vibration of base plate is delivered to inside concrete from concrete surface, thereby plays densification.The vibration frequency of above-mentioned electromagnetic vibrator is 6000 times/minute, and the operating frequency of concrete test block vibratory compaction is 3000 times/minute, and its vibratory compaction can only act on concrete surface in addition, can not be used for the closely knit moulding of concrete test block.

Big in order to overcome existing motor machine shake table equipment steel consumption, the cost height, vibration is inconvenient, energy consumption is big, shortcomings such as the table top amplitude is inhomogeneous, the solution electromagnetic vibrator can not be used for the closely knit moulding of concrete test block, and vibration frequency and the unmatched contradiction of concrete test block vibratory compaction operating frequency, the ad hoc the utility model of having counted.

The utility model is mainly by electromagnet, rubber spring, table top, guide post, suspension rod, and parts such as regulating wheel constitute.At guaranteed output, stroke is short according to electromagnet, when voltage reduces, the characteristic that suction will fiercely increase has adopted the tractive magnet of 5～15kg tractive force, and passes through the diode halfwave rectifier, the resistance current limliting improves the exciting force of shake table greatly, and has guaranteed 3000 times/minute vibration.When power connection, electric current at first carries out halfwave rectifier through rectification circuit, and rectification circuit is made of heavy-duty diode and protective resistance.The resistance of protective resistance is between 40～150 Ω; when first cycle power source is led to; the electromagnet bottom suction that produces unshakable in one's determination is inhaled top armature down, and compression rubber spring; when the half period, power supply was obstructed instantly; rubber spring is upheld, and armature is resetted, and the vibration of generation is delivered on the table top by suspension rod; regulating wheel is used to regulate the spacing (stroke) of unshakable in one's determination and armature, thereby plays the effect of regulating amplitude and acceleration.The configuration of guide post has guaranteed to vibrate and has carried out in vertical direction.

The utlity model has that volume is little, in light weight, price is low, easy to operate, maintenance and debugging is simple, install easily and advantage such as carrying, the cost of general motor machine shake table is about 600 yuan, and the utility model has only about 200～300 yuan.In addition, amplitude of the present utility model is continuously adjustable, and the table top amplitude is even, and motor machine shake table adjusting amplitude need be regulated the eccentric block position, and the table top amplitude is inhomogeneous, and its noise is greater than 100dB, and the utility model is less than 90dB.

Fig. 1 is an organigram of the present utility model.(1) be electromagnet, (2) are rubber springs, and (3) are suspension rod, and (4) are guide post, and (5) are regulating wheel, and (6) are adjusting rods, and (7) are the cover bowl, and (8) are fixed bar, and (9) are acoustic hood, and (10) are table top, and (11) are the shake table bases.

Fig. 2 is rectification circuit figure of the present utility model, and (12) are diodes, and (13) are protective resistances, and (14) are switch or timer.

Fig. 3 is the organigram of electromagnetism mini vibrator.(15) be steel spring plate, (16) are vibrating bottom plates, and (17) are outer covers, and (18) are switches, and (19) are handles.

Most preferred embodiment of the present utility model is the electromagnet of 8kg for adopting tractive force, and the diode of rectification is with commercially available heavy-duty diode, and the resistance of protective resistance is 50～80 Ω, and the rubber hardness (Shao Er A) of making rubber spring is 60 to spend.Panel and base plate are made by the thick steel plate of 5mm, and guide post, cover bowl, fixed bar, suspension rod, regulating wheel, adjusting rod etc. are all made with steel.When power connection,, finish the vibratory compaction moulding of concrete test block by timer control time of vibration.

Claims

1, a kind of micro electromagnetic shake table; by electromagnet [1], suspension rod [3]; regulating wheel [5] adjusting rod [6] constitutes; electromagnet top (armature) is connected with table top [10] by suspension rod; electromagnet bottom (iron core) is connected with base [11] by the regulating wheel adjusting rod; the invention is characterized in that the electromagnet both sides is provided with rubber spring [2] and guide post [4]; spring top links to each other with table top by cover bowl [7]; the bottom links to each other with base by fixed bar [8], and goes here and there on power line the diode [12] and the protective resistance [13] of halfwave rectifier arranged.

2, electromagnetic vibration generator system as claimed in claim 1 is characterized in that described electromagnet is the tractive magnet of 5～15kg tractive force.Rubber spring hardness (Shao Er A) is 60～80 degree.The resistance of protective resistance is between 40～150 Ω.

3, electromagnetic vibration generator system as claimed in claim 1 or 2 is characterized in that described table top, base make by steel plate, and its thickness is 5～10mm.Described cover bowl and fixed bar, guide post, adjusting rod, suspension rod etc. are made of steel.