CN221027350U

CN221027350U - Safety loop of tower crane

Info

Publication number: CN221027350U
Application number: CN202323086770.6U
Authority: CN
Inventors: 尹志豪; 徐景鲁; 刘闯; 张刊; 王汉炜; 刘坤鑫; 何罗波
Original assignee: Zhejiang Construction Engineering Machinery Group Co Ltd
Current assignee: Zhejiang Construction Engineering Machinery Group Co Ltd
Priority date: 2023-11-16
Filing date: 2023-11-16
Publication date: 2024-05-28
Anticipated expiration: 2033-11-16

Abstract

The utility model discloses a safety loop of a tower crane, which comprises a main circuit breaker of the tower crane, a control transformer and a phase sequence protector, wherein the control transformer comprises a first circuit breaker QF1, a second circuit breaker QF2 and a transformer TC1 positioned between the first circuit breaker QF1 and the second circuit breaker QF2, one side of the second circuit breaker QF2 is connected in series with an emergency stop button SB1, a main starting button SB2, a luffing handle SX0, a rotary handle SH0, a lifting handle SQ0, a phase sequence voltage protector KAU and a coil of a main starting contactor KMC, and normally open contacts of the main starting contactor KMC are connected in parallel on the main starting button SB2, the luffing handle SX0, the rotary handle SH0 and the lifting handle SQ0, so that the use safety of the tower crane is improved.

Description

Safety loop of tower crane

Technical Field

The utility model relates to the technical field of tower crane safety, in particular to a safety loop of a tower crane.

Background

The tower crane is widely applied to various construction projects and is used for lifting various building elements on the ground to the top of a building object under construction, so that the working efficiency can be greatly improved. In the prior art, a plurality of buttons or operation handles are arranged on the tower crane and are required to be in a zero state during starting, once the starting loop is disconnected due to the fact that a certain button or operation handle is touched by mistake or shakes in the using process, and once input actions are carried out at the moment, safety accidents can occur, so that a scheme capable of normally working after the tower crane is started is needed when the starting loop is disconnected abnormally.

Disclosure of utility model

In order to solve the technical problems, the utility model provides a safety loop of the tower crane, and the safety of the tower crane during use is improved.

The utility model adopts the following technical scheme:

The utility model provides a safety loop of tower machine, includes tower machine total circuit breaker, control transformer and phase sequence protector, control transformer includes first circuit breaker QF1, second circuit breaker QF2 and lies in the transformer TC1 between first circuit breaker QF1, the second circuit breaker QF2, quick-witted emergency stop button SB1, total start button SB2, luffing handle SX0, gyration handle SH0, lifting handle SQ0, phase sequence voltage protector KAU1 and total start contactor KMC coil are established ties to still connect in parallel on total start button SB2, luffing handle SX0, gyration handle SH0, the lifting handle SQ0 and have the normally open contact of total start contactor KMC, the security when improving the tower machine and using.

Preferably, a start success indicator lamp HL2 is connected in parallel to the coil of the total start contactor KMC.

Preferably, a normally closed contact of the emergency stop button SB1, a normally open contact of the total start button SB2, a normally open contact of the amplitude changing handle SX0, a normally open contact of the turning handle SH0, and a normally open contact of the lifting handle SQ0 are connected in series to one side of the second circuit breaker QF 2.

Preferably, the safety circuit has a first state, in which the total start button SB2 is pressed, and when the scram button SB1, the luffing handle SX0, the swing handle SH0, the lifting handle SQ0, and the phase sequence voltage protector KAU1 are closed, the coil of the total start contactor KMC is powered on, and the normally open contact of the total start contactor KMC forms self-locking for the total start button SB2, the lifting handle SQ0, the luffing handle SX0, and the swing handle SH 0.

Preferably, the main circuit also comprises a main circuit, wherein the main circuit comprises a main circuit breaker Q3, a temperature and humidity module and a main circuit contactor KMA2.

Preferably, the temperature and humidity module includes a temperature and humidity sensor WX1 and a heater JR1, and a temperature and humidity normal relay KA1 is connected in parallel to the heater JR 1.

Compared with the prior art, the utility model has the following advantages: the utility model provides a safety loop of a tower crane, wherein one side of a second breaker QF2 is connected with an emergency stop button SB1, a total start button SB2, an amplitude changing handle SX0, a rotary handle SH0, a lifting handle SQ0, a phase sequence voltage protector KAU and a total start contactor KMC coil in series, the total start button SB2 is pressed, when the emergency stop button SB1, the amplitude changing handle SX0, the rotary handle SH0, the lifting handle SQ0 and the phase sequence voltage protector KAU1 are closed, the total start contactor KMC coil is electrified, and the normally open contact of the total start contactor KMC forms self-locking to the total start button SB2, the lifting handle SQ0, the amplitude changing handle SX0 and the rotary handle SH0, so that the safety of the tower crane in use is improved.

Drawings

Fig. 1 shows a safety circuit of a tower crane.

Fig. 2 shows a main circuit of the turret machine.

Fig. 3 is a main lifting circuit of the tower crane.

Fig. 4 is a main circuit of the tower crane in amplitude variation.

Fig. 5 shows the main boom circuit of the tower crane.

Detailed Description

In order to facilitate understanding of the technical scheme of the present utility model, the following detailed description is made with reference to the accompanying drawings and specific embodiments.

Example 1

As shown in fig. 1, a safety loop of a tower crane comprises a tower crane main breaker, a control transformer and a phase sequence protector, wherein the control transformer comprises a first breaker QF1, a second breaker QF2 and a transformer TC1 positioned between the first breaker QF1 and the second breaker QF2, an emergency stop button SB1, a main starting button SB2, a luffing handle SX0, a rotary handle SH0, a lifting handle SQ0, a phase sequence voltage protector KAU and a main starting contactor KMC coil are connected in series on one side of the second breaker QF2, and normally open contacts of the main starting contactor KMC are connected in parallel on the main starting button SB2, the luffing handle SX0, the rotary handle SH0 and the lifting handle SQ 0.

The coil of the total start contactor KMC is connected with a start success indicator lamp HL2 in parallel.

The normal close contact of the emergency stop button SB1, the normal open contact of the total start button SB2, the normal open contact of the amplitude changing handle SX0, the normal open contact of the turning handle SH0 and the normal open contact of the lifting handle SQ0 are connected in series at one side of the second breaker QF 2.

The safety loop has a first state, in the first state, the total start button SB2 is pressed down, when the scram button SB1, the amplitude changing handle SX0, the rotary handle SH0, the lifting handle SQ0 and the phase sequence voltage protector KAU are closed, the coil of the total start contactor KMC is electrified, and the normally open contact of the total start contactor KMC is closed to form self-locking for the total start button SB2, the lifting handle SQ0, the amplitude changing handle SX0 and the rotary handle SH0, so that the safety of the tower crane during use is improved.

Specifically, before the total start button SB2 (line number 6-7) is pressed, it is required to satisfy that the scram button SB1 is in a released state, the lifting handle SQ0 is in a zero state, the amplitude handle SX0 is in a zero state, the swing handle SH0 is in a zero state, and the phase sequence voltage protector KAU1 is normal;

When the emergency presses the emergency stop button SB1, the safety circuit can be disconnected, namely, the line number 5-6 is not communicated, and the total starting contactor KMC is not sucked; in the zero state of the lifting handle, the line number is 7-8; otherwise, the wire number 7-8 is disconnected and cannot be started, and in order to protect the safety accident if the lifting handle has input action during starting; in the zero position state of the amplitude handle, the line number is 8-9; if the line number 8-9 is disconnected and cannot be started, in order to protect the safety accident if the amplitude handle has input action during starting; the zero state of the rotary handle is realized, and the line number is 9-10; if the wire number 9-10 is disconnected and cannot be started, the safety accident occurs if the rotary handle has input action during starting; the phase sequence voltage protector is normal, the line number is 10-11, otherwise, the 10-11 is disconnected and can not be started, and the phase sequence voltage protector can be started when the phase sequence voltage is normal, otherwise, the components of the control loop can work abnormally and uncontrollable conditions can be generated.

The emergency stop button SB1 is in a loosening state, the lifting handle SQ0 is in a zero state, the amplitude changing handle SX0 is in a zero state, the rotary handle SH0 is in a zero state, when the phase sequence voltage protector KAU1 is normal, the line number 5-6 is communicated, the line number 7-8 is communicated, the line number 8-9 is communicated, the line number 9-10 is communicated, the line number 10-11 is communicated, at the moment, the total starting buttons SB2 and 6-7 are pressed, the total starting contactor KMC is powered on, the normally open and closed line number 6-10 of the KMC form self-locking, and after self-locking, the total starting button SB2, the lifting handle SQ0, the amplitude changing handle SX0 and the switching of the rotary handle SH0 have no influence on whether the total starting contactor KMC is powered off, so that any one of the total starting button SB2, the lifting handle SX0 and the rotary handle SH0 is prevented from being disconnected abnormally and still working normally.

Example 2

The intelligent control system further comprises a rotary main circuit, wherein the rotary main circuit comprises a rotary main circuit breaker Q3, a temperature and humidity module and a rotary circuit main contactor KMA2.

The temperature and humidity module comprises a temperature and humidity sensor WX1 and a heater JR1, and a temperature and humidity normal relay KA1 is connected to the heater JR1 in parallel.

As shown in fig. 2, when the temperature and humidity sensor WX1 alarms and the normally open contact of the temperature and humidity sensor WX1 is closed, the coil (starting heater) of the heater JR1 and the coil of the normal temperature and humidity relay KA1 are powered on, when the coil of the normal temperature and humidity relay KA1 is powered on, the normally closed contact of the normal temperature and humidity relay KA1 becomes normally open, the coil of the main contactor KMA2 of the rotary circuit is not powered on, and when the normally open contact of the main contactor KMA2 of the rotary circuit is not changed, the main circuit of the rotary circuit is not powered on;

When the temperature and humidity sensor WX1 does not alarm, the normally open contact of the temperature and humidity sensor WX1 is unchanged, the coil of the heater JR1 (starting heater) and the coil of the normal temperature and humidity relay KA1 are not electrified, the normally closed contact of the normal temperature and humidity relay KA1 is unchanged when the coil of the normal temperature and humidity relay KA1 is not electrified, the coil of the main contactor KMA2 of the rotary circuit is electrified, and the normally open contact of the main contactor KMA2 of the rotary circuit is normally closed, namely the main circuit of the rotary circuit is electrified.

As shown in fig. 3-5, the present embodiment further includes a lifting main circuit, a luffing main circuit, and a boom main circuit.

The foregoing is merely a preferred embodiment of the present utility model, and the scope of the utility model is defined by the claims, and those skilled in the art should also consider the scope of the present utility model without departing from the spirit and scope of the utility model.

Claims

1. The utility model provides a safety loop of tower machine, its characterized in that includes tower machine total circuit breaker, control transformer and phase sequence protector, control transformer includes first circuit breaker QF1, second circuit breaker QF2 and lies in first circuit breaker QF1, the transformer TC1 between the second circuit breaker QF2, quick-stop button SB1, total start button SB2, luffing handle SX0, gyration handle SH0, lifting handle SQ0, phase sequence voltage protector KAU and total start contactor KMC coil are established ties to second circuit breaker QF2 one side to total start button SB2, luffing handle SX0, lifting handle SQ0 are gone up and are still parallelly connected total start contactor KMC's normally open contact.

2. A safety circuit of a tower crane according to claim 1, wherein the total start contactor KMC coil is connected in parallel with a start success indicator HL2.

3. The safety loop of the tower crane according to claim 1, wherein a normally closed contact of an emergency stop button SB1, a normally open contact of a total start button SB2, a normally open contact of an amplitude changing handle SX0, a normally open contact of a turning handle SH0 and a normally open contact of a lifting handle SQ0 are connected in series at one side of the second circuit breaker QF 2.

4. The safety circuit of a tower crane according to claim 1, wherein the safety circuit has a first state in which the total start button SB2 is pressed, and when the scram button SB1, the luffing handle SX0, the swing handle SH0, the lifting handle SQ0, and the phase sequence voltage protector KAU are closed, the coil of the total start contactor KMC is energized, and the normally open contact of the total start contactor KMC forms a self-lock for the total start button SB2, the lifting handle SQ0, the luffing handle SX0, and the swing handle SH 0.

5. The safety circuit of the tower crane according to claim 1, further comprising a main circuit, wherein the main circuit comprises a main circuit breaker Q3, a temperature and humidity module and a main circuit contactor KMA2.

6. The safety circuit of claim 5, wherein the temperature and humidity module comprises a temperature and humidity sensor WX1 and a heater JR1, and the heater JR1 is connected with a temperature and humidity normal relay KA1 in parallel.