CN2121055U

CN2121055U - Device for demonstrating electrified solenoid magnetism

Info

Publication number: CN2121055U
Application number: CN 92213000
Authority: CN
Inventors: 张孟嘉
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-06-01
Filing date: 1992-06-01
Publication date: 1992-11-04

Abstract

The utility model discloses a device for demonstrating electrified solenoid magnetism, belonging to the technical field of magnetic detecting device. The device for demonstrating electrified solenoid magnetism comprises a power source, a varistor, a key, a sliding magnet changer, a magnetic indication amplifier and a conducting wire. The sliding magnet changer is provided with a solenoid; the winding end head of the solenoid is provided with a post head; the side of the solenoid is provided with a sliding bar which is parallel with the solenoid; the sliding bar is provided with a sliding head which can move along the sliding bar; the lower end of the sliding head is provided with a contact terminal; the end head of the sliding bar is provided with the post head, the solenoid and the sliding bar which are supported and fixed by a supporting frame; the magnetic indication device is arranged on the neighborhood of one end of the sliding magnet changer. The utility model can demonstrate the relationship between the size of the electric current in the solenoid, the change of direction, the change of the turn numbers of the winding, the change of the iron core, etc. and the magnetic performance.

Description

Device for demonstrating electrified solenoid magnetism

The utility model belongs to magnetic and surveys the showing device technical field, is a kind of device of demonstrating energization solenoid magnetic.

In the physics teaching in junior middle school, the experiment of a research energization solenoid magnetic is arranged, existing experimental provision is to hang an iron block down with spring to be energized solenoid attraction, the length that is stretched according to spring is differentiated the power of energising spiral pipe magnetic, because the coefficient of stiffiness of spring can not be done very for a short time, make the distance between iron block and the solenoid can not be big, and be subjected to certain restriction, so experiment effect be not obvious usually by solenoidal electric current.Magnetic and coil turn relation for the research energization solenoid want the different solenoid of the changing-over number of turn, so step are various, experimental period is long.

The purpose of this utility model be to provide that a kind of experiment effect is good, operation steps is simple, convenient, save the device of the demonstration energization solenoid magnetic of experimental period.

The purpose of this utility model realizes with the following methods.The device of this demonstration energization solenoid magnetic comprises power supply, rheostat, telegraph key, slide and become chinaware, magnetic indication amplifier, connect power supply, rheostat, slide and become chinaware, the lead of telegraph key, the change chinaware that slides comprises solenoid, solenoidal coil end is equipped with binding post, the slide bar parallel with solenoid is equipped with on the solenoid next door, adorning the slippery fellow that can move along slide bar on the bar, there is the contact that well contacts with the coil maintenance foxy lower end, there is binding post the termination of slide bar, solenoid and slide bar are by stent support and fixing, iron core inserts in the solenoid, magnetic indicator places to slide and becomes near the end of chinaware, and it is by bearing, be installed in ferromagnetic bar and index dial on the bearing, pointer, the connecting rod that connects ferromagnetic bar and pointer constitutes.The utility model will be further described below in conjunction with the embodiment accompanying drawing.

Fig. 1 slides and becomes the chinaware structure diagram;

Fig. 2 magnetic indicator structure diagram;

Fig. 3, Fig. 4, Fig. 5, Fig. 6 are the utility model user mode schematic diagram.

Among the figure: A-reometer, B-slide and become chinaware, C-magnetic indicator, D-lead, the E-power supply, P-rheostat, K-telegraph key, 1-solenoid, the 2-binding post, 3-slide bar, 4-slippery fellow, the 5-contact, 6-binding post, 7-support, the 8-iron core, 9-ferromagnetic bar, 11-bearing, the 12-index dial, 13-pointer, 14-connecting rod.

Solenoid (1) is to be made of the copper cash that is surrounded by temperature insulation layer close coiled coil on porcelain tube, removed temperature insulation layer at the outermost layer coil with contact (5) contact position, contact (5) slides on coil and just can change the number of turn of line midline circle at an easy rate like this.Ferromagnetic bar (9) adopts iron bar or magnetic stripe.Foxy (4) both sides, lower end respectively have a contact (5) and the coil of solenoid (1) to keep excellent contact.A binding post (2) is respectively arranged at the coil two ends of solenoid (1), a binding post (6) is respectively arranged at the two ends of slide bar (3).

The utility model can be done following purposes:

1, the relation of demonstration energization solenoid magnetic and strength of current.The binding post (6) of the binding post (2) of solenoid (1) and slide bar (3) is respectively got one to be connected with lead (D) and to become chinaware (B) sliding and be serially connected in the circuit as shown in Figure 3.Moving foxy (4) makes the coil turn in solenoid (11) place in circuit maximum, behind the closed telegraph key (K), the slide plate of mobile rheostat (P) changes the strength of current in the circuit, can observe magnetic indication amplifier (C) and go up the change in location of pointer (13) on index dial (12).Ferromagnetic bar (9) adopts iron bar, resistance value on the rheostat (P) hour, electric current in the circuit is big, the magnetic field intensity that is produced by the coil of solenoid (1) is big, attractive force to ferromagnetic bar (9) is big, the amount that the ferromagnetic bar (9) that is suspended on the connecting rod (9) is moved to the left is big, and this amount of movement is little by the amplification of the connecting rod (14) that is connected with ferromagnetic bar (9) and pointer (13), shows big by the angle of the position deflection left of pointer on index dial (12).When the resistance on the rheostat (P) was big, electric current was little, and then to go up the magnetic field intensity that coil produces little for solenoid (1), little to the attractive force of ferromagnetic bar (9), and then the amount that is moved to the left of ferromagnetic bar (9) is little, and the angle of pointer (13) deflection left is little.After magnetic force was eliminated, ferromagnetic bar (9) made pointer (13) return to vertical position under sagging action of gravity own.Therefore from the deflection angle size of pointer (13) size of magnetic field intensity in the size of electric current and the solenoid (1) the circuit as can be known.

2, the relation of the demonstration energization solenoid magnetic and the solenoid link electric coil number of turn.Fixedly the resistance of rheostat (P) is constant, moves the slippery fellow (4) on the change chinaware (B) that slides, and the coil turn of solenoid in the place in circuit (1) is changed, and the change in location of pointer on index dial as shown in Figure 4 in the observation magnetic indication amplifier (C).When the coil turn in the place in circuit increased, the magnetic field intensity in the solenoid (1) increased, and the deflection angle of pointer (13) increases.When the coil turn in the place in circuit reduced, the magnetic field intensity in the solenoid (1) reduced, and the deflection angle of pointer (13) reduces.

3, the relation that has or not iron core in the magnetic of demonstration energization solenoid (1) and the solenoid.Fixedly the resistance of rheostat (P) is constant and slide to become the slippery fellow's (4) of chinaware (B) invariant position, behind the closed telegraph key (K), insertion portion or whole iron core (8) in solenoid (1), the change in location of pointer on index dial as shown in Figure 5 in the observation magnetic indication amplifier.Along with the insertion of iron core (8), the magnetic field intensity that solenoid (1) produces increases, and the deflection angle of pointer (13) increases.

4, the magnetic pole of demonstration energization solenoid and the relation of direction of current.Fixedly the resistance of rheostat (P) is constant, slides to become the invariant position of chinaware (B) foxy (4).With the ferromagnetic bar (9) in the magamp (C) when being changed to magnetic stripe by iron bar, when the magnetic direction of solenoid (1) is consistent with the magnetic direction of magnetic stripe, both attract each other, pointer (13) deflection left, when the magnetic direction of the magnetic direction of solenoid (1) and magnetic stripe is opposite, both repel mutually, and magnetic stripe moves right, and make pointer (13) deflection to the right.The wiring of the last solenoid (1) of changing-over slip change chinaware (B) is shown in Figure 6 as pressing, wiring is changed to the b end by a end, then flow through the direction of current and original current opposite in direction of coil, the magnetic direction that solenoid (1) produces is also opposite, with the interaction of magnetic stripe, will show by the yawing moment of pointer (13) on display panel (12).

The utility model is obvious as energization solenoid magnetic experimental provision experiment effect, experimental implementation is simple, principle is very clear, can do multiple magnetic property and show, saves experimental period greatly, is easy to be accepted by the student.

Claims

1, a kind of device of demonstrating energization solenoid magnetic, comprise power supply (E), rheostat (P), telegraph key (K), slide and become chinaware (B), magnetic indication amplifier (C), connect power supply, rheostat, slide and become chinaware, the lead of telegraph key (D), the change chinaware (B) that it is characterized in that sliding comprises solenoid (1), the coil end of solenoid (1) is equipped with binding post (2), the slide bar (3) parallel with solenoid (1) is equipped with on solenoid (1) next door, adorning the slippery fellow (4) that can move along slide bar on the bar, there is the contact (5) that well contacts with the coil maintenance foxy (4) lower end, there is binding post (6) termination of slide bar (3), solenoid (1) and slide bar (3) are supported by support (7) and are fixing, iron core (8) inserts in the solenoid (1), magnetic indicator (C) places to slide and becomes near the end of chinaware (13), and it is by bearing (11), be installed in ferromagnetic bar (9) and index dial (12) on the bearing (11), pointer (13), the connecting rod (14) that connects ferromagnetic bar (9) and pointer (13) constitutes.

2, the device of demonstration energization solenoid magnetic according to claim 1, it is characterized in that solenoid (1) is to be made of the copper cash that is surrounded by temperature insulation layer close coiled coil on porcelain tube, has removed temperature insulation layer at the outermost layer coil with contact (5) contact position.

3, the device of demonstration energization solenoid magnetic according to claim 1 and 2 is characterized in that ferromagnetic bar (9) is iron bar or magnetic stripe.