Insulating shoe with step voltage alarm function

Abstract

The utility model discloses an insulating shoe with step voltage alarm, which comprises a shoe body, an early warning circuit is arranged in the shoe body, the front end and the rear end of the bottom of the shoe body are respectively provided with a mounting groove, each mounting groove is provided with a grounding electrode slice, the grounding electrode slices at the front end and the rear end and the early warning circuit form a grounding loop through the mounting grooves, and the grounding loop is connected with the early warning circuit. And the early warning circuit is used for carrying out step voltage early warning prompt on an area where a person wearing the insulated shoe is located so as to provide step voltage risk prompt for the worker.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrical tools, in particular to an insulating shoe with step voltage alarm. BACKGROUND

[0002] Step voltage refers to the voltage between the two feet of a person walking in the potential distribution area around the grounding current entry point when an electrical equipment has a grounding fault. When a charged wire of an overhead line falls to the ground, the falling point has the same potential as the charged wire, and the current spreads from the falling point of the wire to the ground. Thus, a potential distribution area is formed around the falling point of the wire on the ground. The farther away from the falling point, the lower the ground potential. The closer to the falling point, the higher the ground potential. Meanwhile, the closer to the falling point, the greater the potential difference per unit distance. Therefore, the closer to the falling point of the wire, the greater the potential difference between the two feet of the person. The potential difference generates current, which forms a path from the feet through the legs, the waist, and the feet to the ground, resulting in electric shock of the person.

[0003] Currently, the main preventive measures for step voltage are to keep away from the falling point of the wire and wear insulating shoes, but there is a lack of real-time monitoring and early warning means for step voltage. Meanwhile, even if the insulating shoes are worn, if the distance to the falling point of the wire is too close, the insulating shoes may be broken down due to the too large voltage difference, resulting in electric shock of the person. CONTENT OF THE INVENTION

[0004] In view of the above problems, the present application provides an insulating shoe with step voltage alarm, which collects the potential difference on the ground through the shoe body grounding electrode piece at the bottom of the shoe body, and performs step voltage early warning after power supply to the early warning circuit.

[0005] The present application is achieved by the following technical solutions:

[0006] An insulating shoe with step voltage alarm comprises a shoe body, an early warning circuit arranged in the shoe body, mounting grooves arranged at the front and rear ends of the bottom of the shoe body, and grounding electrode pieces mounted in the mounting grooves. The grounding electrode pieces at the front and rear ends form a grounding loop with the early warning circuit through the mounting grooves. The early warning circuit is used for early warning of step voltage in the area where a person wearing the insulating shoe is located.

[0007] In some embodiments, springs are arranged in the mounting grooves, and each spring is connected to the grounding electrode piece at the front or rear end, so that the grounding electrode piece protrudes from the sole of the shoe body.

[0008] In some embodiments, the mounting groove comprises a first groove part and a second groove part, the second groove part is used for placing the grounding electrode, and the surface area of the second groove part is greater than that of the first groove part.

[0009] In some embodiments, the ground electrode pieces are connected with the spring buckle.

[0010] In some embodiments, the ground electrode pieces include a first ground electrode piece at the front end of the shoe body bottom and a second ground electrode piece at the rear end of the shoe body bottom, the first ground electrode piece and the second ground electrode piece are used to provide a potential difference for the early warning circuit.

[0011] In some embodiments, the early warning circuit includes a buzzer, an NPN triode, a first resistor and a second resistor, wherein:

[0012] one end of the first resistor and one end of the second resistor are connected to the base of the NPN triode;

[0013] the collector of the NPN triode is connected to the first ground electrode piece and the other end of the second resistor;

[0014] the emitter of the NPN triode is connected to the buzzer, the second ground electrode and the other end of the first resistor.

[0015] In some embodiments, the shoe body is an insulating shoe body.

[0016] In some embodiments, the distance between the first ground electrode piece and the second ground electrode piece is 20 cm.

[0017] In some embodiments, the first resistor is smaller than the second resistor.

[0018] In some embodiments, the first resistor is 1 ohm and the second resistor is 9 ohms.

[0019] Compared with the prior art, the present application can have at least the following advantages or beneficial effects:

[0020] In the present application, an insulating shoe with step voltage alarm is provided, which includes a shoe body, an early warning circuit arranged in the shoe body, mounting grooves arranged at the front and rear ends of the shoe body bottom, ground electrode pieces mounted in the mounting grooves, the ground electrode pieces at the front and rear ends forming a grounding loop with the early warning circuit through the mounting grooves, and the early warning circuit being used to provide step voltage early warning prompt for the area where the personnel wearing the insulating shoe are located, so as to provide step voltage risk prompt for the staff.

[0021] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present application, nor is it used to limit the scope of the present application. Other features of the present application will become apparent through the following description. BRIEF DESCRIPTION OF DRAWINGS

[0022] The present application will be described in more detail below based on the embodiments and with reference to the accompanying drawings.

[0023] Figure 1 A side view of an example insulating shoe is shown in an embodiment of the present application.

[0024] Figure 2 A perspective view of an example insulating shoe is shown in an embodiment of the present application.

[0025] Figure 3 A schematic diagram of an example early warning circuit is shown in an embodiment of the present application. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0027] In the related art, the preventive measures for step voltage mainly include keeping away from the drop point of the conductor and wearing insulating shoes, but there is a lack of real-time monitoring and early warning means for step voltage. Meanwhile, even if the insulating shoes are worn, if the distance to the drop point of the conductor is too close, the insulating shoes may be broken down due to the excessively large voltage difference, causing the person to be electrocuted.

[0028] In view of the above problems, the present application provides an insulating shoe with step voltage alarm, which can solve the problem that the ordinary insulating shoes do not have monitoring and early warning functions. The buzzer in the early warning circuit is combined with the insulating shoe, and the electrode sheet is used to collect the potential difference of the ground. When the potential difference exceeds a certain value, the buzzer rings to remind the person of the danger of step voltage.

[0029] Please refer to Figure 1 , Figure 1 A side view of an example insulating shoe is shown in an embodiment of the present application.

[0030] An insulating shoe with step voltage alarm includes: an insulating shoe body, an early warning circuit arranged in the insulating shoe body, a mounting groove arranged at the front end and the rear end of the bottom of the insulating shoe body, a grounding electrode sheet mounted in each mounting groove, and the grounding electrode sheets at the front end and the rear end forming a grounding loop with the early warning circuit through the mounting grooves. The early warning circuit is used for early warning and prompting of step voltage in the area where the person wearing the insulating shoe is located.

[0031] In some embodiments, the grounding electrode sheet includes a first grounding electrode sheet at the front end of the bottom of the shoe body and a second grounding electrode sheet at the rear end of the bottom of the shoe body, and the first grounding electrode sheet and the second grounding electrode sheet are used to provide a potential difference for the early warning circuit.

[0032] In the embodiment, the ground electrode pieces are installed in front and back of the insulating shoe sole, used for collecting potential difference in front and back of the insulating shoe, and providing power for the buzzer in the early warning circuit.

[0033] In some embodiments, springs are arranged in the installation slot, and each spring is connected to the ground electrode piece at the front end and the back end respectively, so that the ground electrode piece protrudes from the shoe sole of the shoe body.

[0034] In the embodiment, the reset spring is connected to the inside of the ground electrode piece, and the inside of the spring is fixed in the installation slot of the shoe sole. The outside of the ground electrode piece protrudes from a part of the shoe sole, which can ensure that the electrode piece can effectively contact the ground.

[0035] In some embodiments, the installation slot includes a first recess portion and a second recess portion, and the second recess portion is used for placing the ground electrode, and the surface area of the second recess portion is greater than the surface area of the first recess portion.

[0036] In the embodiment, the first recess portion and the second recess portion, and the second recess portion with a surface area greater than the surface area of the first recess portion, are arranged so that there is a gap between the inside of the electrode piece and the insulating shoe sole, which ensures that the electrode piece can move a certain distance in the direction of the installation slot under the condition of pressure on the outside without being damaged.

[0037] In some embodiments, the ground electrode piece is buckle-connected with the spring.

[0038] In the embodiment, the ground electrode piece is buckle-connected with the spring, and when the ground electrode piece is worn out and cannot be in good contact with the ground, the buckle can be released and the electrode piece can be replaced.

[0039] In some embodiments, the early warning circuit includes a buzzer, an NPN triode, a first resistor, and a second resistor, wherein:

[0040] The base of the NPN triode is connected to one end of the first resistor and one end of the second resistor;

[0041] The collector of the NPN triode is connected to the first ground electrode piece and the other end of the second resistor;

[0042] The emitter of the NPN triode is connected to the buzzer, the second ground electrode, and the other end of the first resistor.

[0043] In the embodiment of the present application, the pre-warning circuit adopts NPN transistor circuit, and utilizes the characteristic of the dead zone voltage of NPN transistor. When the base-emitter voltage (voltage on the first resistor) is greater than the dead zone voltage, the transistor is turned on, the buzzer is powered and emits a buzzing sound, which is used to remind the personnel that there is a step voltage here and to evacuate as soon as possible. When the base-emitter voltage (voltage on the first resistor) is less than the dead zone voltage, the transistor is turned off, the buzzer stops emitting a buzzing sound, and the personnel is reminded of the correct evacuation direction or has evacuated to a safe place.

[0044] The present application provides an insulating shoe with step voltage alarm. The pre-warning circuit does not have built-in power supply, and is powered by the ground electrode sheet, so that the power supply does not need to be disassembled, the circuit can be simplified, and the convenience and reliability are improved.

[0045] In combination Figure 1 With Figure 2 A ground electrode sheet is installed on the front and rear parts of the bottom of the insulating shoe, wherein the ground electrode sheet on the front side of the shoe bottom is a ground electrode 1, the ground electrode sheet on the rear side of the shoe bottom is a ground electrode 2, and the distance between the ground electrode 1 and the ground electrode 2 is 20 cm. The inner side of the electrode sheet is connected to a reset spring, and the inner side of the reset spring is fixed in the shoe bottom mounting groove. The outer side of the electrode sheet protrudes from the shoe bottom by a part, so that the electrode sheet can be in effective contact with the ground. At the same time, there is a certain gap between the inner side of the electrode sheet and the insulating shoe bottom, so that the electrode sheet can move a certain distance in the direction of the mounting groove under the condition of external pressure without being damaged. In addition, the electrode sheet and the reset spring are connected by buckling, and when the electrode sheet is worn and cannot be in good contact with the ground, the buckling can be released and the electrode sheet can be replaced.

[0046] The ground electrode 1 and the ground electrode 2 are connected to the buzzer circuit, which is used to provide a potential difference for the buzzer circuit.

[0047] Referring to Figure 3 The pre-warning circuit schematic diagram shown in the figure, wherein the NPN transistor is a silicon transistor with a dead zone voltage of 0.5 V. Since the distance between the ground electrode 1 and the ground electrode 2 is 20 cm, and the person's step is generally 80 cm, the step voltage received by the personnel is approximately 4 times the potential difference between the ground electrode 1 and the ground electrode 2. When the step voltage reaches 40 V, the person will have the risk of electric shock, so the step voltage alarm of the present insulating shoe is set to 20 V.

[0048] When the personnel walks towards the ground, the potential of the ground electrode 1 is higher than that of the ground electrode 2, and when the potential difference reaches 5 V, the step voltage received by the personnel at this moment is 20 V. According to Ohm's law, the voltage on the R1 resistor at this time is 0.5 V, which reaches the dead zone voltage of the NPN transistor. At this time, the NPN transistor is turned on, the buzzer is powered and emits a buzzing sound.

[0049] When the personnel walk away from the grounding point, or have evacuated to a safe place, at this time the potential difference between the grounding electrode 1 and the grounding electrode 2 is lower than the 0.5V dead zone voltage, the buzzer stops beeping. In a complex environment, the personnel cannot observe the specific grounding point of the wire, and the personnel are reminded of the correct evacuation direction.

[0050] The above examples are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art will understand that the technical solutions recorded in the foregoing examples can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not drive the essence of the corresponding technical solutions out of the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An insulating shoe with a step voltage alarm, characterized by comprising: The utility model relates to an insulating shoe with a prewarning circuit, which comprises: a shoe body, a prewarning circuit arranged in the shoe body, mounting grooves arranged at the front and rear ends of the bottom of the shoe body, and ground electrode pieces mounted in the mounting grooves, the ground electrode pieces at the front and rear ends forming a grounding loop with the prewarning circuit through the mounting grooves, and the prewarning circuit being used for prewarning the step voltage of the area where the person wearing the insulating shoe is located.

2. The insulating shoes with step voltage alarm according to claim 1, characterized in that, The mounting grooves are provided with springs, and each spring is connected to the ground electrode piece at the front or rear end to make the ground electrode piece protrude from the sole of the shoe body.

3. The insulating shoes with step voltage alarm according to claim 2, characterized in that, The mounting grooves comprise a first recess part and a second recess part, the second recess part being used for placing the ground electrode, and the surface area of the second recess part being greater than that of the first recess part.

4. The insulating shoes with step voltage alarm according to claim 2, characterized in that, The ground electrode pieces are snap-connected to the springs.

5. The insulating shoe with step voltage alarm according to claim 1, wherein The ground electrode pieces comprise a first ground electrode piece at the front end of the bottom of the shoe body and a second ground electrode piece at the rear end of the bottom of the shoe body, and the first and second ground electrode pieces are used for providing a potential difference for the prewarning circuit.

6. The insulating shoes with step voltage alarm according to claim 5, characterized in that, The prewarning circuit comprises a buzzer, an NPN triode, a first resistor, and a second resistor, wherein: the base of the NPN triode is connected to one end of the first resistor and one end of the second resistor; the collector of the NPN triode is connected to the first ground electrode piece and the other end of the second resistor; the emitter of the NPN triode is connected to the buzzer, the second ground electrode, and the other end of the first resistor.

7. The insulating shoe with step voltage alarm according to claim 1, wherein The shoe body is an insulating shoe body.

8. The insulating shoe with step voltage alarm according to claim 5, wherein, The distance between the first ground electrode piece and the second ground electrode piece is 20 cm.

9. The insulating shoe with step voltage alarm according to claim 6, wherein The first resistor is smaller than the second resistor.

10. The insulating shoe with step voltage alarm according to claim 9, wherein The first resistor is 1 ohm, and the second resistor is 9 ohm.

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