CN116699468A - An inspection instrument for judging the grounding wire of a crane - Google Patents

Abstract

The invention provides an inspection instrument for judging a crane grounding wire, which comprises a transmitter and a receiver; the transmitter is arranged at least one grounding point arranged on the crane, and the receiver is arranged at one grounding end connected with the body of the crane; the transmitter is used for responding to a starting instruction to generate an output signal and transmitting the output signal to the grounding end through the grounding point and the vehicle body; the receiver is used for collecting the output signal received by the grounding end, verifying the output signal, and recording a signal receiving condition after the verification is successful; the receiver is also used for judging whether the grounding wire is disconnected according to all recorded signal receiving conditions, and judging that the grounding wire is disconnected and alarming when the interval time between any two signal receiving conditions exceeds a preset time threshold value. The receiver of the invention always detects the pulse signal, judges that the ground wire is disconnected, and sends out an alarm.

Description

An inspection instrument for judging the grounding wire of a crane

technical field

The invention relates to the technical field of judging the grounding wire of a crane, in particular to an inspection instrument for judging the grounding wire of a crane.

Background technique

In places where high-voltage cables are exposed, such as high-voltage substations, it is extremely dangerous to perform hoisting operations. Both the crane arm and the car body are metal materials, which are conductors. In addition, the crane arm needs to be extended or rotated during the operation, and the operation range is large, so it is very easy to touch the high-voltage cables.

After the crane touches the live wire, the current is conducted through the metal boom to make the whole body electrified. Workers on and near the vehicle will be shocked by touch voltage and step voltage respectively. Due to the strong power and high voltage level of high-voltage lines, people who are shocked by electric shocks are prone to serious injuries and death. The lack of electric shock protection measures for cranes has become a serious hidden danger that has been threatening the safety of crane operators for many years.

In order to solve this problem, the crane is often grounded, so that the current can be quickly led to the ground to protect the staff. However, the existing solutions can only visually check whether the grounding is grounded, and cannot accurately guarantee that the grounding effect of the grounding wire is still good after the crane rotates for a period of time.

Contents of the invention

The purpose of the present invention is to provide an inspection instrument for judging the grounding wire of a crane, so as to solve the technical problem of how to accurately and quickly determine whether the grounding wire of a crane is good.

On the one hand, an inspection instrument for judging the grounding wire of a crane is provided, including:

transmitter and receiver;

The transmitter is arranged at at least one grounding point provided on the crane, and the receiver is arranged at a grounding terminal connected to the car body of the crane;

The transmitter is used to generate an output signal in response to a starting command, and transmit the output signal to the ground terminal through the ground point and the vehicle body;

The receiver is used to collect the output signal received by the ground terminal, and verify the output signal, and record the signal reception once after the verification is successful;

The receiver is also used to judge whether the grounding wire is disconnected according to all recorded signal receiving situations, and when the interval between any two signal receiving situations exceeds a preset time threshold, it is determined that the grounding wire is disconnected, and the Call the police.

Preferably, the transmitter includes:

A transmitter housing, in which a transmitting circuit board and a transmitter battery are arranged, and the transmitting circuit board is electrically connected to the transmitter battery;

The front end of the transmitter housing is provided with a transmitting terminal, the transmitting terminal is fixed in the transmitter housing by a transmitting terminal fixing screw, and the transmitting terminal is electrically connected to the transmitting circuit board.

Preferably, the transmitter also includes:

The transmitter upper shell is fixed on the tail end of the transmitter shell and is sleeved on the outside of the launch circuit board, and is used to prevent liquid from flowing into the transmitter shell.

Preferably, the transmitter also includes:

A permanent magnet, a plurality of permanent magnets are evenly engaged and fixed on the front end of the transmitter casing, and the permanent magnets are used to fix the transmitter to a grounding point on the crane.

Preferably, the receiver includes:

The receiver shell is provided with a receiver circuit board and a receiver battery; the receiver circuit board is electrically connected to the receiver battery.

Preferably, the receiver also includes:

The magnetic conductive block is fixed on the bottom of the receiver shell, and the magnetic conductive block is used to detect the signal receiving condition of the ground terminal.

Preferably, the receiver includes:

The upper shell of the receiver is fixed on the top of the receiver shell and sleeved on the outside of the receiver circuit board, and is used to prevent liquid from flowing into the receiver shell.

Preferably, the transmitting circuit board mixes the signal loaded with the fingerprint authentication according to a preset signal, and outputs the mixed signal to the grounding point of the crane through the transmitting terminal.

Preferably, the receiver circuit board receives the signal detected by the magnetic conductive block, and verifies the received signal according to the preset signal characteristics. After the verification is passed, it is recorded as a valid signal, and the continuous verification judgment is performed, Generate test results.

In summary, implementing the embodiments of the present invention has the following beneficial effects:

In the inspection instrument for judging the grounding wire of a crane provided by the invention, the transmitter is adsorbed to the car body or boom of the crane through a magnet, and its discharge point is connected with the car body by a conductor. The receiver is attracted to the grounding rod or the conical temporary grounding rod through a magnet, and the detection line is in good contact with the grounding rod or the conical temporary grounding rod. The receiver is always detecting the pulse signal. When no pulse signal is detected for 3 consecutive times , it is judged that the ground connection is disconnected and an alarm is issued.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, obtaining other drawings based on these drawings still belongs to the scope of the present invention without any creative effort.

Fig. 1 is a schematic diagram of an inspection instrument for judging the ground wire of a crane in an embodiment of the present invention.

Fig. 2 is a schematic diagram of a transmitter in an embodiment of the present invention.

Fig. 3 is a schematic diagram of a receiver in an embodiment of the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

As shown in FIG. 1 , it is a schematic diagram of an embodiment of an inspection instrument for judging the ground wire of a crane provided by the present invention. In this example, include:

A transmitter 101 and a receiver 102; the transmitter 101 is arranged at least one grounding point provided on the crane, and the receiver 102 is arranged at a grounding end connected with the car body of the crane; the The transmitter 101 is used to generate an output signal in response to the start command, and transmit the output signal to the ground terminal through the ground point and the vehicle body; the receiver 102 is used to collect all the signals received by the ground terminal. The output signal is described above, and the output signal is verified. When the verification is successful, the signal reception is recorded once; the receiver 102 is also used to judge whether the ground wire is disconnected according to all the signal reception recorded. When the interval time between two signal receiving situations exceeds the preset time threshold, it is determined that the grounding wire is disconnected, and an alarm is issued. It can be understood that the detection instrument is composed of two modules, one module is the transmitter 101, which is adsorbed to the crane body or the boom through a magnet. And the discharge point is connected with the vehicle body by a conductor. The other module is the receiver 102, which is also attracted to the grounding round rod or the conical temporary grounding rod by a magnet, and the detection wire is in good contact with the grounding round rod or the conical temporary grounding rod. Wherein, the transmitter 101 sends a modulated signal every 1 second, and the signal passes through the grounding point A, the crane body, the grounding point B, the grounding wire, and reaches the grounding terminal C in sequence. The receiver 102 installed at the ground terminal C is always detecting the pulse signal, and when the pulse signal is not detected for 3 consecutive times, it is determined that the connection of the ground wire is disconnected. Sound the alarm.

In a specific embodiment, as shown in FIG. 2 , the transmitter 101 includes: a transmitter housing 2, in which a transmitting circuit board 1 and a transmitter battery 3 are arranged, and the connection between the transmitting circuit board 1 and the transmitter battery 3 Electrically connected; the front end of the transmitter housing 2 is provided with a transmitting terminal 4, and the transmitting terminal 4 is fixed in the transmitter housing 2 by a transmitting terminal fixing screw 5, and the transmitting terminal 4 is connected to the transmitting circuit board 1 electrical connection. The transmitter upper case 7 is fixed on the tail end of the transmitter case 2 and sleeved on the outside of the launch circuit board 1 for preventing liquid from flowing into the transmitter case 2 . The permanent magnet 6, a plurality of the permanent magnets 6 are evenly engaged and fixed on the front end of the transmitter housing 2, and the permanent magnet 6 is used to fix the transmitter 101 to the grounding point on the crane.

Understandably, the transmitting circuit board 1 is installed inside the transmitter housing 2, and the transmitter battery 3 is connected to the transmitting circuit board 1 for power supply. 4 pieces of permanent magnets are installed in the four corners of the bottom of the transmitter housing 2 . The transmitting terminal 4 is installed in the center of the bottom of the transmitter housing 2, and the transmitting circuit board 1, the transmitter housing 2, and the transmitting terminal 4 are connected and fixed by fixing screws; so that the transmitting circuit board 1 and the transmitting terminal 4 are kept in communication. The transmitter upper shell 7 is installed on the transmitter shell 2 to play the role of waterproof protection.

In this embodiment, as shown in FIG. 3 , the receiver 102 includes: a receiver housing 9 in which a receiver circuit board 8 and a receiver battery 10 are arranged; the receiver circuit board 8 and the receiver battery 10 are electrically connected. The magnetic conductive block 11 is fixed on the bottom of the receiver shell 9, and the magnetic conductive block 11 is used to detect the signal receiving condition of the ground terminal. The receiver upper shell 13 is fixed on the top of the receiver housing 9 and sleeved on the outside of the receiver circuit board 8 for preventing liquid from flowing into the receiver housing 9 . Understandably, the receiver circuit board 8 is installed inside the receiver housing 9 , and the receiver battery 10 is connected to the receiver circuit board 8 for power supply. The magnetic conductive block 11 is installed on the bottom of the receiver shell 9, and the magnetic conductive block 11, the receiver shell 9, and the receiver circuit board 8 are connected and fixed by fixing screws 12. The magnetic conductive block 11 of the receiver 102 is kept in communication with the receiver circuit board 8 . The receiver shell 9 is installed on the receiver shell 9 to play the role of waterproof protection.

In this embodiment, the transmitting circuit board 1 mixes the signal loaded with the fingerprint authentication signal according to the preset signal, and outputs the authenticated output signal to the grounding point of the crane through the transmitting terminal 4 . The receiver circuit board 8 receives the signal detected by the magnetic conductive block 11, and verifies the received signal according to the preset signal characteristics. After the verification is passed, it is recorded as a valid signal, and is continuously verified and judged to generate Test Results. It can be understood that, during detection, after the crane car body is parked, there are two connection points of grounding point A and connection point of grounding point B on the car body. Wherein the transmitter 101 is magnetically installed at the connection A, and it is ensured that the transmitting terminal 4 is in good contact with the connection A. The connection of the car body B is connected to the ground terminal C through a temporary ground cable. The receiver 102 is magnetically mounted to the ground terminal C, and it is ensured that the magnetic conductive block 11 of the receiver 102 is in good contact with C.

Start the transmitter 101, the transmitter 101 supplies power, through the internal transformer, the boost circuit boosts the voltage, and outputs it after ANDing with the prefabricated modulation signal. The high-voltage and low-current signals generated by it are transmitted to the transmitting terminal 4 through the fixing screw; then flow into the crane body through the connection of the crane body A, and because the connection of the crane body B has been well grounded, the signal finds the shortest discharge path and flows into the ground Wire.

The signal reaches the ground terminal C through the ground wire and the receiver 102 installed on the ground terminal C. The magnetic conductive block 11 receives part of the signal and transmits it to the receiving circuit board through the fixing screw.

The receiving circuit board passes signal detection and signal amplification, and the processor performs fingerprint authentication on the received signal, and if it is confirmed to be a signal sent by the transmitter 101, record it once. If no legal signal is received for 3 consecutive seconds, it is considered that the grounding wire is disconnected and an alarm is triggered immediately.

In summary, implementing the embodiments of the present invention has the following beneficial effects:

In the inspection instrument for judging the grounding wire of a crane provided by the invention, the transmitter is adsorbed to the car body or boom of the crane through a magnet, and its discharge point is connected with the car body by a conductor. The receiver is attracted to the grounding rod or the conical temporary grounding rod through a magnet, and the detection line is in good contact with the grounding rod or the conical temporary grounding rod. The receiver is always detecting the pulse signal. When no pulse signal is detected for 3 consecutive times , it is judged that the ground connection is disconnected and an alarm is issued.

The above disclosures are only preferred embodiments of the present invention, and certainly cannot limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention still fall within the scope of the present invention.

Claims (9)

1. An inspection instrument for crane ground wire determination, comprising:

a transmitter and a receiver;

the transmitter is arranged at least one grounding point arranged on the crane, and the receiver is arranged at one grounding end connected with the body of the crane;

the transmitter is used for responding to a starting instruction to generate an output signal and transmitting the output signal to the grounding end through the grounding point and the vehicle body;

the receiver is used for collecting the output signal received by the grounding end, verifying the output signal, and recording a signal receiving condition after the verification is successful;

the receiver is also used for judging whether the grounding wire is disconnected according to all recorded signal receiving conditions, and judging that the grounding wire is disconnected and alarming when the interval time between any two signal receiving conditions exceeds a preset time threshold value.

2. The inspection apparatus of claim 1, wherein the transmitter comprises:

the transmitter comprises a transmitter shell, a transmitter circuit board and a transmitter battery, wherein the transmitter circuit board and the transmitter battery are arranged in the transmitter shell and are electrically connected;

the front end of the transmitter shell is provided with a transmitting terminal, the transmitting terminal is fixed in the transmitter shell through a transmitting terminal fixing screw, and the transmitting terminal is electrically connected with the transmitting circuit board.

3. The inspection apparatus of claim 2, wherein the transmitter further comprises:

and the emitter upper shell is fixed at the tail end of the emitter shell and sleeved on the outer side of the emitting circuit board, and is used for preventing liquid from flowing into the emitter shell.

4. The inspection apparatus of claim 3, wherein the transmitter further comprises:

the permanent magnets are uniformly clamped and fixed at the front end of the emitter shell, and the permanent magnets are used for fixing the emitter at the grounding point on the crane.

5. The inspection apparatus of claim 4, wherein the receiver comprises:

a receiver housing in which a receiver circuit board and a receiver battery are disposed; the receiver circuit board is electrically connected with the receiver battery.

6. The inspection apparatus of claim 5, wherein the receiver further comprises:

the magnetic conductive block is fixed at the bottom end of the receiver shell and is used for detecting the signal receiving condition of the grounding end.

7. The inspection apparatus of claim 6, wherein the receiver comprises:

and the receiver upper shell is fixed at the top end of the receiver shell and sleeved outside the receiver circuit board, and is used for preventing liquid from flowing into the receiver shell.

8. The inspection apparatus of claim 7, wherein the transmitting circuit board mixes the loading fingerprint authentication signal according to a preset signal and outputs the mixed signal to the ground point of the crane through the transmitting terminal.

9. The inspection apparatus according to claim 8, wherein the receiver circuit board receives the signal detected by the magnetic conductive block, verifies the received signal according to a preset signal characteristic, records as a valid signal after the verification is passed, and performs continuous verification judgment to generate the test result.