CN211040437U

CN211040437U - Automatic stop protector

Info

Publication number: CN211040437U
Application number: CN201921740867.5U
Authority: CN
Inventors: 杨艳; 李敬朴; 范力; 焦莹莹; 张晋; 李鸿; 葛恩宜; 蒋冉; 赵林; 张景; 马允全; 张迎迎; 胡永; 李续; 朱金金
Original assignee: Jiangsu Dahan Construction Industrial Group Co ltd
Current assignee: Jiangsu Dahan Construction Industrial Group Co ltd
Priority date: 2019-10-17
Filing date: 2019-10-17
Publication date: 2020-07-17
Anticipated expiration: 2029-10-17

Abstract

The utility model discloses an automatic shutdown protection device relates to the safety protection technical field of reinforcing bar thread rolling machine operation. The protection device comprises a position sensing switch and a relay electrically connected with the position sensing switch, and the relay is electrically connected with a main motor of the thread rolling machine; when the thread rolling machine works normally, the position sensing switch is broken, and the relay is a passage; when the thread rolling machine is toppled, the position sensing switch is switched on, the relay is switched off, and the thread rolling machine is stopped. The utility model discloses an automatic shutdown protection device installs on reinforcing bar thread rolling machine, has improved reinforcing bar thread rolling machine's automatic safety protection ability greatly, but position inductive switch automatic perception thread rolling machine's position, in case monitor thread rolling machine position anomaly, position inductive switch action is rapid, can cut off thread rolling machine main motor power automatically immediately, makes thread rolling machine shut down immediately, does not need to rely on personnel to go to press emergency stop button and shuts down, avoids causing serious injury accident.

Description

Automatic stop protector

Technical Field

The utility model relates to a safety protection technical field of reinforcing bar thread rolling machine operation, concretely relates to reinforcing bar thread rolling machine is emptyd back auto-stop protection device.

Background

The reinforcing steel bar thread rolling machine is used for machining threads at the end parts of reinforcing steel bars in constructional engineering so that the reinforcing steel bars are lengthened by adopting a threaded connection technology, and is widely applied to constructional engineering.

When the steel bar thread rolling machine works, the steel bar is fixed in a clamp of the thread rolling machine, and the rolling cutter head rotates at the end part of the steel bar, so that threads are rolled at the end part of the steel bar. The rotating rolling cutter head is easy to wind the clothes and limbs of the operator, causing safety accidents. Meanwhile, in the process of processing the thread of the steel bar, if the clamp for fixing the steel bar is loosened, the whole steel bar can rotate along with the rolling tool bit, and the rotating steel bar is easy to wind with nearby personnel and articles to cause safety accidents. When more reinforcing steel bar thread rolling machines are operated in China, clothes or limbs of people are wound due to the rotation of the cutter head and the reinforcing steel bars, and further casualty safety accidents are caused.

In order to prevent such safety accidents, the safety protection measures of the currently marketed reinforcing steel bar thread rolling machine are as follows: a red emergency stop button is arranged on a control panel of the reinforcing steel bar thread rolling machine, and once abnormal conditions occur, operating personnel or rescue personnel can press the emergency stop button to stop the thread rolling machine and stop the rotating tool bit and the reinforcing steel bar.

Although the emergency stop button plays a certain safety protection role, serious potential safety hazards also exist. For example, in a security accident occurring in 2018, the clothes of an operator are wound by the thread rolling machine, so that the thread rolling machine is inclined to the ground, the control panel faces the ground, the emergency stop button is blocked by the thread rolling machine body, a rescuer cannot press the emergency stop button, only the main wiring box switch is disconnected, and the operator is wound, extruded and dies on the spot after only a delay of several seconds.

Therefore, in view of the above problems, there is a need for a safety protection device capable of automatically stopping in an abnormal situation, so as to improve the existing safety protection measures of the steel bar thread rolling machine that needs to stop by pressing an emergency stop button by a person, and reduce the occurrence of injury accidents.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model discloses an automatic shutdown protection device installs on the thread rolling machine, when the thread rolling machine emptys, and automatic circular telegram cuts off the relay for the thread rolling machine is shut down, avoids causing serious injury accident.

The utility model provides an automatic shutdown protection device for a steel bar thread rolling machine, which comprises a position sensing switch and a relay electrically connected with the position sensing switch, wherein the relay is electrically connected with a main motor of the thread rolling machine; when the thread rolling machine works normally, the position sensing switch is broken, and the relay is a passage; when the thread rolling machine is toppled, the position sensing switch is switched on, the relay is switched off, and the thread rolling machine is stopped.

The position sensing switch is arranged on the thread rolling machine and comprises an inverted conical cavity, and the disc-shaped top wall and the conical top wall of the conical cavity are two mutually insulated electrodes; when the thread rolling machine works normally, the metal ball is positioned at the bottom of the conical cavity under the influence of gravity, two electrodes are not communicated, and the position sensing switch is opened; when the thread rolling machine is toppled, the metal ball slides to the top of the conical cavity under the influence of gravity, and is connected with the two electrodes and the position sensing switch circuit.

Preferably, the conical cavity is filled with insulating oil for enabling the movement of the metal ball to be in a high damping state.

Preferably, the depth of the insulating oil pouring is greater than the diameter of the metal ball.

Preferably, a disc-shaped electrode is attached to the inner wall of the disc-shaped top wall of the conical cavity, a conical electrode is attached to the inner wall of the conical top wall, and the two electrodes are electrically insulated.

Preferably, the shell of the position sensing switch is cylindrical, a first wiring pile and a second wiring pile are arranged at the top of the position sensing switch, the first wiring pile is connected with the disc-shaped electrode through a wire, and the second wiring pile is connected with the conical electrode through a wire.

Preferably, the conical electrode and the disc-shaped electrode are respectively made of two metal conductor thin plates with good electric conduction.

Preferably, the diameter of the metal ball is less than half of the height of the conical cavity and more than four times of the distance between the conical electrode and the disc-shaped electrode.

Compared with the prior art, the utility model discloses an automatic shutdown protection device's advantage is:

(1) the protection device is installed on a reinforcing steel bar thread rolling machine, the automatic safety protection capability of the reinforcing steel bar thread rolling machine is greatly improved, the position sensing switch can automatically sense the position of the thread rolling machine, and once the position of the thread rolling machine is monitored to be abnormal, the position sensing switch acts rapidly, the power supply of a main motor of the thread rolling machine can be immediately and automatically cut off, so that the thread rolling machine is immediately stopped, and the thread rolling machine does not need to be stopped by pressing an emergency stop button by a person, so that serious injury accidents are avoided.

(2) The protection device is low in cost, small in size, convenient to install, free of electric energy consumption during non-action, simple to reset after action, and capable of improving the safety level of the reinforcing steel bar thread rolling machine and reducing safety accidents of the thread rolling machine when being installed on the reinforcing steel bar thread rolling machine in a large scale.

Drawings

For a clear explanation of the embodiments or prior art solutions of the present invention, the drawings that are needed in the description of the embodiments or prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for a person skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic circuit diagram of an automatic shutdown protection device disclosed in the present invention.

Fig. 2 is a vertical cross-sectional view of the position sensitive switch.

Fig. 3 is a horizontal sectional view of the position sensing switch.

The part names represented by the numbers or letters in the drawings are:

1-a thread rolling machine; 2-main motor of thread roller; 3-position sensing switch; 4-a relay; 5-a housing; 6-metal balls; 7-a conical electrode; 8-a disc-shaped electrode; 9-a first wiring stud; 10-a second wiring stud; 11-insulating oil.

Detailed Description

The following description briefly describes embodiments of the present invention with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work based on the embodiments of the present invention belong to the protection scope of the present invention.

Fig. 1-3 show preferred embodiments of the invention, which have been dissected in detail from different perspectives, respectively.

The automatic stop protection device shown in fig. 1 is suitable for a steel bar thread rolling machine 1 and comprises a position sensing switch 3 and a relay 4 electrically connected with the position sensing switch 3, wherein the relay 4 is electrically connected with a main motor 2 of the thread rolling machine. When the thread rolling machine 1 works normally, the position sensing switch 3 is switched off, and the relay 4 is switched on; when the thread rolling machine 1 topples, the position sensing switch 3 is switched on, the relay 4 is switched off, and the thread rolling machine 1 stops.

As shown in fig. 2 and 3, the position-sensitive switch 3 is installed on the thread rolling machine 1, and when the position-sensitive switch 3 is installed, the normal working position of the position-sensitive switch 3 is maintained, and the position-sensitive switch 3 should be firmly fixed with the thread rolling machine 1, so that the normal operation of the thread rolling machine 1 is not affected. The position sensitive switch 3 comprises an inverted conical cavity with a disc shaped top wall and a conical top wall being two mutually insulated electrodes. Specifically, disc-shaped electrode 8 is attached to the inner wall of the disc-shaped top wall of the conical cavity, conical electrode 7 is attached to the inner wall of the conical top wall, the conical electrode 7 and the disc-shaped electrode 8 are respectively made of two metal conductor thin plates with good electric conduction, and a small distance is reserved between the two metal thin plates, so that the two electrodes are electrically insulated.

A metal ball 6 is placed in the conical cavity, the diameter of the metal ball 6 is less than half the height of the conical cavity and more than four times the distance between the conical electrode 7 and the disc-shaped electrode 8. The metal ball 6 is made of a material which has good conductivity and is not easy to oxidize, and the surface is smooth. When the thread rolling machine 1 works normally, the metal ball 6 is positioned at the bottom of the conical cavity under the influence of gravity, two electrodes are not communicated, and the position sensing switch 3 is switched off; when the thread rolling machine 1 is toppled, the metal ball 6 slides to the top of the conical cavity under the influence of gravity, and is connected with the two electrodes and the position sensing switch 3 is connected.

Further, after the position sensing switch 3 is provided with the rear electrode, the metal ball 6 and the lead, the conical cavity is filled with insulating oil 11 for enabling the movement of the metal ball 6 to be in a high damping state, and then the conical cavity is sealed. The insulating oil 11 is arranged, so that the interference of environmental vibration to the movement of the metal ball 6 is reduced, the false operation of the position sensing switch 3 caused by the environmental interference is reduced, and specifically, the filling depth of the insulating oil is greater than the diameter of the metal ball.

Further, its shell 5 of position sensing switch 3 is for using the cylindrical of insulating material preparation, and the top of shell 5 is provided with first wiring stake 9 and second wiring stake 10, and first wiring stake 9 and second wiring stake 10 are metallic conductor, and disc electrode 8 is connected through the wire to first wiring stake 9, and conical electrode 7 is connected through the wire to second wiring stake 10, and relay 4 is connected with position sensing switch 3 electrical connection through first wiring stake 9 and second wiring stake 10.

To sum up, the utility model discloses an automatic shutdown protection device installs on reinforcing bar thread rolling machine, has improved reinforcing bar thread rolling machine's automatic safety protection ability greatly, but position inductive switch automatic perception thread rolling machine's position, in case monitor thread rolling machine position unusual, position inductive switch action is rapid, can automatic cutout thread rolling machine main motor power immediately, makes thread rolling machine shut down immediately, does not need to rely on personnel to go to press emergency stop button and shuts down, avoids causing serious injury accident. Meanwhile, the protection device is low in cost, small in size, convenient to install, free of electric energy consumption during non-action, simple to reset after action, and capable of improving the safety level of the reinforcing steel bar thread rolling machine and reducing safety accidents of the thread rolling machine when being installed on the reinforcing steel bar thread rolling machine in a large scale.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An automatic shutdown protection device is used for a steel bar thread rolling machine (1) and is characterized by comprising a position sensing switch (3) and a relay (4) electrically connected with the position sensing switch (3), wherein the relay (4) is electrically connected with a main motor (2) of the thread rolling machine; when the thread rolling machine (1) normally works, the position induction switch (3) is in an open circuit, and the relay (4) is in a closed circuit; when the thread rolling machine (1) topples over, the position sensing switch (3) is switched on, the relay (4) is switched off, and the thread rolling machine (1) is stopped;

the position sensing switch (3) is arranged on the thread rolling machine (1) and comprises an inverted conical cavity, and the disc-shaped top wall and the conical top wall of the conical cavity are two mutually insulated electrodes; a metal ball (6) is placed in the conical cavity, when the thread rolling machine (1) works normally, the metal ball (6) is located at the bottom of the conical cavity under the influence of gravity, two electrodes are not communicated, and the position sensing switch (3) is opened; when the thread rolling machine (1) is toppled, the metal ball (6) slides to the top of the conical cavity under the influence of gravity, and is connected with the two electrodes and the position sensing switch (3) to be communicated.

2. Automatic shutdown protection device according to claim 1, characterized in that the conical cavity is filled with an insulating oil (11) for high damping of the movement of the metal ball (6).

3. Automatic shutdown protection device according to claim 2, characterized in that the insulating oil (11) is poured to a depth greater than the diameter of the metal ball (6).

4. Automatic shutdown protection device according to claim 1, characterized in that a disc shaped electrode (8) is attached to the inner wall of the disc shaped top wall of the conical cavity, a conical electrode (7) is attached to the inner wall of the conical top wall, both electrodes being electrically insulated.

5. Automatic shutdown protection device according to claim 4, characterized in that the position sensitive switch (3) has a cylindrical housing (5) with a first terminal stud (9) and a second terminal stud (10) on top, the first terminal stud (9) being connected to the disc-shaped electrode (8) by a wire and the second terminal stud (10) being connected to the cone-shaped electrode (7) by a wire.

6. Automatic shutdown protection device according to claim 5, characterized in that the conical electrode (7) and the disc-shaped electrode (8) are made of two metal conductor sheets with good electrical conductivity.

7. Automatic shutdown protection device according to claim 4, characterized in that the diameter of the metal ball (6) is less than half the height of the conical cavity and more than four times the distance between the conical electrode (7) and the disc-shaped electrode (8).