CN211184285U

CN211184285U - Lifting machine unlocking electromagnet and overheating prevention control circuit for switching power supply

Info

Publication number: CN211184285U
Application number: CN201922363078.0U
Authority: CN
Inventors: 赵惠瑶
Original assignee: Zhongshan Jierong Automobile Maintenance Detection Equipment Co ltd
Current assignee: Zhongshan Jierong Automobile Maintenance Detection Equipment Co ltd
Priority date: 2019-12-25
Filing date: 2019-12-25
Publication date: 2020-08-04
Anticipated expiration: 2029-12-25

Abstract

The utility model discloses a machine of lifting unblock electro-magnet and switching power supply are with preventing overheated control circuit, including setting up first unblock electro-magnet and the second unblock electro-magnet on the machine of lifting stand, be fixed with automatically controlled block terminal on the machine of lifting stand be fixed with the installing support in the automatically controlled block terminal be fixed with P L C controller on the installing support, with alternating current switching power supply, direct current switching power supply, decline solenoid valve and the contactor that the P L C controller is connected be fixed with ascending control button, decline control button and lock control button and power change over switch on the automatically controlled block terminal.

Description

Lifting machine unlocking electromagnet and overheating prevention control circuit for switching power supply

Technical Field

The utility model belongs to the technical field of the machine of lifting, concretely relates to machine of lifting unblock electro-magnet and switching power supply are with preventing overheated control circuit.

Background

In the automobile protection industry, a lifter is important equipment for maintaining automobiles, and the descending control is that after an unlocking electromagnet is used for attracting a lock hook to be separated from a lock catch, a descending electromagnetic valve of a hydraulic system is electrified for returning oil, so that the lifter descends. The power of two unlocking electromagnets is 105W, the attraction gap distance of the electromagnet moving iron core is 20mm, the attraction force is 4.5kg, the descending electromagnetic valve is 14W, the switching power supply is 250VA/24V, the current flowing through the electromagnet is 4.4A according to calculation, the temperature of the unlocking electromagnet is too high due to long-time attraction, the actually measured temperature can reach 90 ℃ after 5 minutes of operation, the unlocking electromagnet is easy to damage, on the other hand, the switching power supply can be overloaded due to large current value, the whole control circuit is disabled, and the lifting machine cannot normally work, so that the applicability and the practicability are limited.

Disclosure of Invention

The utility model aims at providing a machine of lifting unblock electro-magnet and switching power supply that structure setting is reasonable and the suitability is strong are with preventing overheated control circuit.

The utility model provides a realize the technical scheme of the purpose is that machine of lifting unblock electro-magnet and switching power supply are with preventing overheated control circuit, including setting up first unblock electro-magnet and the second unblock electro-magnet on the machine stand of lifting, be fixed with automatically controlled block terminal on the machine stand of lifting be fixed with the installing support in the automatically controlled block terminal be fixed with P L C controller on the installing support, with switching power supply, decline solenoid valve and the contactor that P L C controller is connected be fixed with ascending control button, decline control button and lock control button and power change over switch fall on the automatically controlled block terminal, the contactor with the ascending control button is established ties, the decline solenoid valve with the lock control button is established ties, the coil of first unblock electro-magnet is established ties with third normally open contact, the coil of second unblock electro-magnet is established ties with second normally open contact, is connected through the fourth normally closed between the coil of first unblock electro-magnet and the coil of second unblock electro-magnet, the signal output part of P L C controller is connected with first normally open control button, second normally open contact and second normally closed contact and second normally open contact after the descending control button.

The input of the alternating current switching power supply is alternating current 220V, and the output of the alternating current switching power supply is direct current 24V.

The utility model has the advantages of the utility model discloses a structure sets up rationally, and it realizes controlling through P L C controller and a plurality of first ~ fourth normally open normally closed contact, is favorable to guaranteeing stability and the reliability of using, is favorable to preventing simultaneously that the unblock electro-magnet is overheated to lead to the unable normal decline of lift problem, ensures the suction force of unblock electro-magnet when the unblock, also is favorable to reducing the damage of components and parts simultaneously, is favorable to improving life, and the suitability is strong and the practicality is good.

Drawings

In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is provided in connection with the following specific embodiments, taken in conjunction with the accompanying drawings, in which:

fig. 1 is a schematic view of an electric control distribution box of the present invention;

fig. 2 is a schematic diagram of the circuit structure of the present invention.

Detailed Description

(example 1)

Fig. 1 and 2 show an embodiment of the present invention, wherein fig. 1 is a schematic view of an electrically controlled distribution box of the present invention; fig. 2 is a schematic diagram of the circuit structure of the present invention.

Referring to fig. 1 and 2, an overheat prevention control circuit for an unlocking electromagnet and a switching power supply of a lifting machine comprises a first unlocking electromagnet DC1 and a second unlocking electromagnet DC2 which are arranged on a lifting machine upright post, a first normally open and normally closed contact COM1, a second normally open contact COM2, a third normally open contact COM3 and a fourth normally open and normally closed contact COM4, wherein an electric control distribution box 1 is fixed on the lifting machine upright post, a mounting bracket 2 is fixed in the electric control distribution box, a P L C controller 3, a switching power supply AC/DC, a descending electromagnetic valve and a contactor JQ which are connected with the P L C controller are fixed on the mounting bracket, an ascending control button SA, a descending control button XA, a falling lock control button L SA and a power supply changeover switch ZHK are fixed on the electric control distribution box, the contactor is connected in series with the ascending control button, the descending electromagnetic valve is connected in series with the falling lock control button, a first unlocking electromagnet is connected in series with the first unlocking electromagnet, a second unlocking electromagnet is connected in series with the normally open contact coil, a second unlocking electromagnet DC, a second unlocking electromagnet is connected with the second normally closed contact P L, and a light normally closed electromagnet is connected in series with the unlocking electromagnet.

The alternating current switching power supply outputs alternating current 220V and direct current 24V.

When a descending button XA is pressed and maintained, signals are input at an input end X of a P C, a COM normally open contact is attracted for 2 seconds according to a program of the P C, a contactor of a hydraulic station motor is electrified and attracted, the hydraulic station motor is electrified, a COM normally open contact stops rising according to a program of the P C after a lifter rises for 2 seconds, no load exists on a safety lock hook, a normally closed contact of the COM normally open contact is opened while attracting, the input ends X, X and X of the P C wait, when the COM normally open contact is opened after two seconds, the normally closed contact is connected, the input ends X, X and X of the P C simultaneously input signals, signals are input at output ends COM, COM and COM simultaneously attract according to the program of the P C, the COM normally closed contact is opened at the moment, a DC coil of an electromagnet passes through the COM normally open contact and is electrified with direct current 24V, a DC coil of the COM normally closed electromagnet passes through the COM normally open contact and is electrified with a DCF of a COM normally open contact and passes through the COM normally open contact and is electrified and simultaneously, and is electrified with direct current 24V, three load coils, reliable attraction of a DCT is ensured, the lifting electromagnet is reliably attracted after the COM normally closed, the lifting is started to operate according to a power supply W5.

In the circuit, the COM3 and COM4 normally open contacts are firstly attracted for 0.5 second and then disconnected through a P L C controller, the unlocking electromagnets DC1 and DC2 are connected in parallel and electrified with DC24V for 0.5 second and then are converted into series connection DC24V through COM4 normally closed contacts to be attracted, each electromagnet coil is only DC12V, the unlocking electromagnet enables a lock hook to be separated from a lock catch when the lifting machine descends, so that the lifting machine descends, experiments show that the current of the unlocking electromagnet after series connection is 8.8A, the unlocking electromagnet does not generate heat after long-term operation, the actually measured temperature is only 45 ℃ under the condition of 32 ℃ of the ambient temperature, heat balance is achieved, and the switching power supply is not overloaded for a long time.

The utility model discloses a structure sets up rationally, and it is realized controlling through P L C controller and a plurality of normally open and normally closed contact, is favorable to guaranteeing stability and the reliability of using, is favorable to preventing simultaneously that the overheated unable normal decline problem of machine that leads to lifting of unblock electro-magnet, ensures the suction force of unblock electro-magnet when the unblock, also is favorable to reducing the damage of components and parts simultaneously, is favorable to improving life, and the suitability is strong and the practicality is good.

The standard parts used in the present embodiment may be purchased directly from the market, and the non-standard structural components described in the specification and drawings may be obtained by processing without any doubt according to the common general knowledge in the art, and the connection manner of the respective parts is by the conventional means developed in the art, and the machines, parts and equipment are of the conventional type in the art, so that the detailed description thereof is omitted.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And such obvious changes and modifications which fall within the spirit of the invention are deemed to be covered by the present invention.

Claims

1. The utility model provides a lift quick-witted unblock electro-magnet and switching power supply are with preventing overheated control circuit, is including setting up first unblock electro-magnet and the second unblock electro-magnet on lifting quick-witted stand, its characterized in that is fixed with automatically controlled block terminal on lifting quick-witted stand be fixed with the installing support in the automatically controlled block terminal be fixed with P L C controller on the installing support, with alternating current switching power supply, direct current switching power supply, decline solenoid valve and the contactor that the P L C controller is connected be fixed with ascending control button, decline control button and lock control button and power change over switch on the automatically controlled block terminal, the contactor with the ascending control button is established ties, the decline solenoid valve with the lock control button is established ties, the coil and the third normally open contact of first unblock electro-magnet establish ties, the coil and the second normally open electro-magnet of second unblock electro-magnet establish ties, through fourth normally closed connection between the coil of first unblock electro-magnet and the coil of second unblock electro-magnet, the signal output part of P L C controller is connected with first normally closed contact, second normally closed contact and second normally closed contact after descending control button and the second normally open-contact.

2. The elevator unlocking electromagnet and the switching power supply overheating prevention control circuit according to claim 1, characterized in that: the input end of the alternating current switch power supply is alternating current 220V, and the output end of the alternating current switch power supply is direct current 24V.