Direct-current electricity checking and discharging integrated device

Abstract

The utility model discloses a direct current electricity checking and discharging integrated device, a detachable grounding wire is arranged on a rod body of an insulating rod, an electricity checking and discharging detection box is arranged at the front end of the insulating rod, and the detection box comprises a box body and a contact end which is arranged at the front end of the box body and is used for being connected with a direct current contact network. A contact network live detection circuit and a contact network discharge circuit are arranged in the box body. According to the utility model, integrated automatic operation of electricity testing and discharging of the direct-current contact network can be realized, and when the power failure of the contact network is verified, automatic control and rapid discharging can be realized, so that the operation is simplified, and the discharging time is reduced at the same time.

Description

Technical Field

[0001] The utility model relates to a device for electric power maintenance tools, in particular to a DC inspection and discharge integrated device for use in DC catenary maintenance operations. Background Art

[0002] When the subway catenary specialty conducts sectional power outage maintenance operations in the depot / parking lot, due to the normal electrification of adjacent power supply sections in the operation area, there is still residual voltage (the residual voltage can be as high as 1200V) after the operation area is powered off. It is necessary to use a DC discharge rod to discharge the catenary end; currently, the traditional DC discharge rod has a slow discharge speed, and it takes up to about 1 hour at most to reduce the residual voltage to the safe voltage range. However, the power outage maintenance operation time in the depot / parking lot sectional area is often less than 3 hours, and the discharge time accounts for 1 / 3 of the entire sectional maintenance operation time, seriously affecting the maintenance operation efficiency. Therefore, if the existing device can be improved to accurately determine whether there is residual voltage at the catenary end and quickly reduce it below the safe voltage range, the maintenance operation efficiency of the catenary specialty in the depot / parking lot sectional area can be greatly improved. Summary of the Utility Model

[0003] In view of this, the purpose of the utility model is to provide a DC inspection and discharge integrated device, which can overcome the defects existing in the prior art.

[0004] The purpose of the utility model is realized by the following technical solutions:

[0005] For the DC inspection and discharge integrated device, the device includes an insulating rod, a detachable grounding wire is arranged on the rod body of the insulating rod, a inspection and discharge detection box is arranged at the front end of the insulating rod, the detection box includes a box body and a contact end arranged at the front end of the box body for connecting with the DC catenary, and a catenary electrified detection circuit and a catenary discharge circuit are arranged inside the box body;

[0006] The catenary electrified detection circuit includes a catenary electrified judgment loop module, a self-check and battery power self-check loop module, and a catenary electrified alarm loop module;

[0007] The catenary discharge circuit includes a catenary normal electrification detection module, a catenary induced electricity detection module, a discharge loop module, and a discharge display loop module.

[0008] Further, the catenary electrified judgment loop module includes a logic control NAND gate chip U1, a first triode Q1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a first capacitor C1, and a twenty-eighth resistor R28, a twenty-ninth resistor R29, a thirtieth resistor R30, a thirty-first resistor R31, and a thirty-second resistor R32;

[0009] The self-checking and battery power self-checking circuit module includes a voltage detection chip U2, a first diode D1, a second diode D2, a third diode D3, a second indicator U6, an eighth triode Q8, a seventh resistor R7, an eighth resistor R8, a thirty-sixth resistor R36, and a thirty-seventh resistor R37;

[0010] The catenary live alarm circuit module includes a sixth triode Q6, a nineteenth resistor R19, a twentieth resistor R20, a twenty-second resistor R22, a twenty-third resistor R23, a twenty-seventh resistor R27, a third capacitor C3, a buzzer BUZZER1, and a first indicator U5;

[0011] After the 1A and 1B pins of the chip U1 are connected to the 2Y pin, they are sequentially connected in series with the twentieth resistor R20 and the nineteenth resistor R19 and then connected to the 2B pin of the chip U1. The common connection point of the twentieth resistor R20 and the nineteenth resistor R19 is sequentially connected in series with the third capacitor C3 and the twenty-second resistor R22 and then connected to the base of the sixth triode Q6. The 1Y pin of the chip U1 is connected to the common connection point of the third capacitor C3 and the twenty-second resistor R22. The emitter of the sixth triode Q6 is grounded, and the collector of the sixth triode Q6 is connected to the buzzer BUZZER1 and then connected to the power supply;

[0012] The VDD pin of the chip U1 is connected to the power supply. The 3Y pin of the chip U1 is connected to the 2A pin. After the 3A and 3B pins of the chip U1 are connected, they are sequentially connected in series with the sixth resistor R6 and the fourth resistor R4 and then connected to the collector of the first triode Q1. The common connection point of the sixth resistor R6 and the fourth resistor R4 is sequentially connected in series with the first capacitor C1 and the fifth resistor R5 and then connected to the power supply through the thirty-second resistor R32; The common connection point of the fifth resistor R5 and the thirty-second resistor R32 is also connected to the collector of the first triode Q1. The common connection point of the first capacitor C1 and the fifth resistor R5 is connected to the VSS pin of the chip U1 and then grounded;

[0013] The emitter of the first triode Q1 is connected to the base of the first triode Q1 through the second resistor R2 and the emitter is grounded. The base of the first triode Q1 is connected to the contact end of the device after being successively connected in series with the third resistor R3, the twenty-eighth resistor R28, the twenty-ninth resistor R29, the thirtieth resistor R30 and the thirty-first resistor R31. The base of the first triode Q1 is also connected to the negative electrode of the first diode D1. The positive electrode of the first diode D1 is connected in series with the seventh resistor R7 and then connected to the positive electrode of the third diode D3. The negative electrode of the third diode D3 is connected to the positive electrode of the second diode D2. The negative electrode of the second diode D2 is connected to the VCC pin of the first voltage detection chip U2. The RES pin of the first voltage detection chip U2 is connected to the base of the eighth triode Q8 through the eighth resistor R8. The GND pin of the first voltage detection chip U2 is connected to the emitters of the eighth triode Q8 and the ninth triode Q9 respectively and then grounded. The second indicator U6 includes a third light-emitting diode and a fourth light-emitting diode with different light colors. The positive electrodes of the two light-emitting diodes are connected and then connected to the positive electrode of the third diode D3 through the thirty-seventh resistor R37. The common connection point of the thirty-seventh resistor R37 and the third diode D3 is connected to the power supply through the switch SW1. The collector of the eighth triode Q8 is connected to the base of the ninth triode Q9 through the thirty-sixth resistor R36. The common connection point of the collector of the eighth triode Q8 and the thirty-sixth resistor R36 is connected to the negative electrode of the third light-emitting diode. The collector of the ninth triode Q9 is connected to the negative electrode of the fourth light-emitting diode.

[0014] The first indicator U5 includes a first light-emitting diode and a second light-emitting diode with different light colors. The positive electrodes of the first light-emitting diode and the second light-emitting diode are both connected to the power supply. The negative electrode of the first light-emitting diode is connected to the collector of the sixth triode Q6.

[0015] Further, the catenary normal charged detection module includes a second voltage detection chip U3, a ninth resistor R9, a tenth resistor R10, a thirty-third resistor R33, a thirty-fourth resistor R34 and a thirty-fifth resistor R35.

[0016] The catenary induced electricity detection module includes an operational amplifier chip U4, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, an eighteenth resistor R18, a second capacitor C2, a third triode Q3, and a fourth diode D4.

[0017] The discharge circuit module includes a field effect transistor Q2, an eleventh resistor R11, a twelfth resistor R12, a twenty-fourth resistor R24, and a twenty-fifth resistor R25.

[0018] The discharge display circuit module includes a fifth triode Q5 and a twenty-sixth resistor R26.

[0019] The VIN- pin of the operational amplifier chip U4 is grounded through the sixteenth resistor R16, and this pin is also connected to the VOUT pin through the seventeenth resistor R17. The +VS pin of the operational amplifier chip U4 is grounded through the second capacitor C2, and this pin is also connected to the cathode of the fourth diode D4. The anode of the fourth diode D4 is connected to the power supply. The VOUT pin of the operational amplifier chip U4 is connected to the base of the third triode Q3 through the fifteenth resistor R15. The emitter of the third triode Q3 is grounded. The collector of the third triode Q3 is connected to the power supply through the fourteenth resistor R14 on the one hand. On the other hand, the collector is also connected to the anode of the sixth diode D6, and the cathode of the sixth diode D6 is grounded through the eighteenth resistor R18. The common connection point of the sixth diode D6 and the eighteenth resistor R18 is connected to the 4A pin of the chip U1. The -VS pin of the operational amplifier chip U4 is grounded.

[0020] The VIN+ pin of the operational amplifier chip U4 is connected to the VCC pin of the second voltage detection chip U3 through the thirteenth resistor R13. This VCC pin is connected to the contact end of the device after being serially connected with the thirty-fourth resistor R34, the thirty-fifth resistor R35, the thirty-third resistor R33, and the ninth resistor R9 in sequence. This VCC pin is also grounded after being connected to the GND pin of the second voltage detection chip U3 through the tenth resistor R10. The RES pin of the operational amplifier chip U4 is connected to the anode of the fifth diode D5, and the cathode of the fifth diode D5 is grounded through the eighteenth resistor R18.

[0021] The D pole of the field effect transistor Q2 is connected to the contact end of the device through the eleventh resistor R11. On the other hand, the D pole of the field effect transistor Q2 is also connected to the S pole of the field effect transistor Q2 through the twelfth diode D12, and the common connection point of the twelfth diode D12 and the S pole is grounded. The S pole of the field effect transistor Q2 is also connected to the G pole of the field effect transistor Q2 through the twenty-fifth resistor R25. This G pole is connected to the base of the fifth triode Q5 after being serially connected with the twenty-fourth resistor R24 and the twenty-sixth resistor R26 in sequence. The emitter of the fifth triode Q5 is grounded.

[0022] The cathode of the second light-emitting diode is connected to the collector of the fifth triode Q5.

[0023] Furthermore, the power supply is a battery.

[0024] Furthermore, the chip model of the U1 is HEF4093.

[0025] Furthermore, the model of the U2 is CN61C33.

[0026] Furthermore, the model of the U3 is CN61C33.

[0027] Further, the model of U4 is SGM8041.

[0028] The beneficial effects of the present utility model are as follows:

[0029] The present utility model can realize the integrated automatic operation of DC catenary power verification and discharge. When it is verified that the catenary is de-energized (the catenary voltage is below 1000V), it can realize the automatic control of rapid discharge, simplify the operation, and reduce the discharge time at the same time.

[0030] Other advantages, objectives and features of the present utility model will be described to some extent in the subsequent specification, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the present utility model. The objectives and other advantages of the present utility model can be realized and obtained through the following specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings, where:

[0032] Figure 1 is a schematic diagram of the circuit connection of the present utility model;

[0033] Figure 2 is a schematic diagram of the physical structure of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] The following will refer to the drawings to describe the preferred embodiments of the present utility model in detail. It should be understood that the preferred embodiments are only for explaining the present utility model, rather than limiting the protection scope of the present utility model.

[0035] As Figure 1 shown, the DC power verification and discharge integrated device of the present utility model includes an insulating rod 1. A detachable grounding wire 4 is provided on the rod body of the insulating rod. An inspection and discharge detection box is provided at the front end of the insulating rod. The inspection and discharge detection box includes a box body 2 and a contact end 3 provided at the front end of the box body for connecting to the DC catenary. A catenary live detection circuit and a catenary discharge circuit are provided inside the box body;

[0036] Among them, the catenary live detection circuit includes a catenary live judgment loop module, a self-check and battery power self-check loop module, and a catenary live alarm loop module;

[0037] The catenary discharge circuit includes a catenary normal live detection module, a catenary induced electricity detection module, a discharge loop module, and a discharge display loop module.

[0038] In this embodiment, the catenary live judgment loop module includes a logic control NAND gate chip U1, a first triode Q1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a first capacitor C1, and a twenty-eighth resistor R28, a twenty-ninth resistor R29, a thirtieth resistor R30, a thirty-first resistor R31, and a thirty-second resistor R32; in this embodiment, the chip model of U1 is HEF4093. It is a four-way 2-input NAND gate with Schmitt trigger inputs. The inputs include clamping diodes, which enables the input interface to be connected to a voltage exceeding VDD using a current-limiting resistor. Additionally, the HEF4093 Schmitt trigger inputs convert slowly changing input signals into clearly defined jitter-free output signals.

[0039] The self-check and battery power self-check loop module includes a voltage detection chip U2, a first diode D1, a second diode D2, a third diode D3, a second indicator U6, an eighth triode Q8, a seventh resistor R7, an eighth resistor R8, a thirty-sixth resistor R36, and a thirty-seventh resistor R37; in this embodiment, the model of U2 is CN61C33. The CN61C series of circuits are high-precision, low-power voltage detection integrated circuits developed using CMOS technology. This series of circuits do not require external components, thereby improving the reliability of the system and reducing the cost of the system. When the detected power supply voltage is lower than the detection threshold, the RES pin outputs a low level; when the power supply voltage is greater than the detection threshold plus the hysteresis, the RES pin outputs a high level.

[0040] The catenary live alarm loop module includes a sixth triode Q6, a nineteenth resistor R19, a twentieth resistor R20, a twenty-second resistor R22, a twenty-third resistor R23, a twenty-seventh resistor R27, a third capacitor C3, a buzzer BUZZER1, and a first indicator U5;

[0041] After the 1A and 1B pins of the chip U1 are connected to the 2Y pin, they are sequentially connected in series with the twentieth resistor R20 and the nineteenth resistor R19 and then connected to the 2B pin of the chip U1. The common connection point of the twentieth resistor R20 and the nineteenth resistor R19 is sequentially connected in series with the third capacitor C3 and the twenty-second resistor R22 and then connected to the base of the sixth triode Q6. The 1Y pin of the chip U1 is connected to the common connection point of the third capacitor C3 and the twenty-second resistor R22. The emitter of the sixth triode Q6 is grounded, and the collector of the sixth triode Q6 is connected to the buzzer BUZZER1 and then connected to the power supply;

[0042] The VDD pin of chip U1 is connected to the power supply. The 3Y pin of chip U1 is connected to the 2A pin. After the 3A and 3B pins of chip U1 are connected, they are successively connected in series with the sixth resistor R6 and the fourth resistor R4, and then connected to the collector of the first triode Q1. The common connection point of the sixth resistor R6 and the fourth resistor R4 is successively connected in series with the first capacitor C1 and the fifth resistor R5, and then connected to the power supply through the thirty-second resistor R32. The common connection point of the fifth resistor R5 and the thirty-second resistor R32 is also connected to the collector of the first triode Q1. The common connection point of the first capacitor C1 and the fifth resistor R5 is connected to the VSS pin of chip U1 and then grounded.

[0043] The emitter of the first triode Q1 is connected to the base of the first triode Q1 through the second resistor R2 and the emitter is grounded. The base of the first triode Q1 is successively connected in series with the third resistor R3, the twenty-eighth resistor R28, the twenty-ninth resistor R29, the thirtieth resistor R30 and the thirty-first resistor R31, and then connected to the contact end of the device. The base of the first triode Q1 is also connected to the negative electrode of the first diode D1. The positive electrode of the first diode D1 is connected in series with the seventh resistor R7 and then connected to the positive electrode of the third diode D3. The negative electrode of the third diode D3 is connected to the positive electrode of the second diode D2. The negative electrode of the second diode D2 is connected to the VCC pin of the first voltage detection chip U2. The RES pin of the first voltage detection chip U2 is connected to the base of the eighth triode Q8 through the eighth resistor R8. The GND pin of the first voltage detection chip U2 is connected to the emitters of the eighth triode Q8 and the ninth triode Q9 respectively and then grounded.

[0044] The second indicator U6 includes a third light-emitting diode and a fourth light-emitting diode with different light colors. The positive electrodes of the light-emitting diodes are connected and then connected to the positive electrode of the third diode D3 through the thirty-seventh resistor R37. The common connection point of the thirty-seventh resistor R37 and the third diode D3 is connected to the power supply through the switch SW1. The collector of the eighth triode Q8 is connected to the base of the ninth triode Q9 through the thirty-sixth resistor R36. The common connection point of the collector of the eighth triode Q8 and the thirty-sixth resistor R36 is connected to the negative electrode of the third light-emitting diode. The collector of the ninth triode Q9 is connected to the negative electrode of the fourth light-emitting diode. In this embodiment, the third light-emitting diode is a red light, and the fourth light-emitting diode is a green light.

[0045] The first indicator U5 includes a first light-emitting diode and a second light-emitting diode with different light colors. The positive electrodes of the light-emitting diodes are both connected to the power supply. The negative electrode of the first light-emitting diode is connected to the collector of the sixth triode Q6 (i.e., at Q4C in the figure). In this embodiment, the first light-emitting diode is a red light, and the second light-emitting diode is a green light.

[0046] The catenary normal live detection module includes a second voltage detection chip U3, a ninth resistor R9, a tenth resistor R10, a thirty-third resistor R33, a thirty-fourth resistor R34, and a thirty-fifth resistor R35; in this embodiment, the model of U3 is the same as that of U2, both being CN61C33.

[0047] The catenary induced electricity detection module includes an operational amplifier chip U4, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, an eighteenth resistor R18, a second capacitor C2, a third triode Q3, and a fourth diode D4; in this embodiment, the model of U4 is SGM8041.

[0048] The discharge loop module includes a field effect transistor Q2, an eleventh resistor R11, a twelfth resistor R12, a twenty-fourth resistor R24, and a twenty-fifth resistor R25;

[0049] The discharge display loop module includes a fifth triode Q5 and a twenty-sixth resistor R26;

[0050] The VIN- pin of the operational amplifier chip U4 is grounded through the sixteenth resistor R16, and this pin is also connected to the VOUT pin through the seventeenth resistor R17. The +VS pin of the operational amplifier chip U4 is grounded through the second capacitor C2, and this pin is also connected to the negative electrode of the fourth diode D4. The positive electrode of the fourth diode D4 is connected to the power supply. The VOUT pin of the operational amplifier chip U4 is connected to the base of the third triode Q3 through the fifteenth resistor R15. The emitter of the third triode Q3 is grounded. The collector of the third triode Q3 is connected to the power supply through the fourteenth resistor R14 on the one hand; on the other hand, this collector is also connected to the positive electrode of the sixth diode D6. The negative electrode of the sixth diode D6 is grounded through the eighteenth resistor R18. The common connection point of the sixth diode D6 and the eighteenth resistor R18 is connected to the 4A pin of the chip U1. The -VS pin of the operational amplifier chip U4 is grounded;

[0051] The VIN+ pin of the operational amplifier chip U4 is connected to the VCC pin of the second voltage detection chip U3 through the thirteenth resistor R13. This VCC pin is connected to the contact end of the device in sequence after being serially connected with the thirty-fourth resistor R34, the thirty-fifth resistor R35, the thirty-third resistor R33, and the ninth resistor R9. This VCC pin is also connected to the GND pin of the second voltage detection chip U3 through the tenth resistor R10 and then grounded. The RES pin of the operational amplifier chip (U4) is connected to the positive electrode of the fifth diode D5. The negative electrode of the fifth diode D5 is grounded through the eighteenth resistor R18;

[0052] The D pole of the field effect transistor Q2 is connected to the contact end of the device through the eleventh resistor R11. On the other hand, the D pole of the field effect transistor Q2 is also connected to the S pole of the field effect transistor Q2 through the twelfth diode D12, and the common contact point of the twelfth diode D12 and the S pole is grounded; the S pole of the field effect transistor Q2 is also connected to the G pole of the field effect transistor Q2 through the twenty-fifth resistor R25, and this G pole is connected to the base of the fifth triode Q5 in series with the twenty-fourth resistor R24 and the twenty-sixth resistor R26 in sequence; the emitter of the fifth triode Q5 is grounded;

[0053] The negative pole of the second light-emitting diode D52 is connected to the collector of the fifth triode Q5 (i.e., at Q5C in the figure).

[0054] The power supply VBAT in this embodiment is a battery, which can be a dry battery or a storage battery, as long as it can meet the device requirements. The power supply voltage of the detection box in this embodiment is 6V and is composed of 4 1.5V button batteries connected in series.

[0055] The functions that the present utility model can achieve are as follows:

[0056] 1. Self-check function:

[0057] (1) When the battery power is low and the test button is pressed, the red light of the second indicator U6 lights up;

[0058] (2) When the battery power is sufficient and the test button is pressed, the green light of the second indicator U6 lights up and the buzzer sounds, indicating that the self-check is passed.

[0059] 2. Detection and discharge functions:

[0060] (1) When the detected DC voltage is 1000V - 1800V, at this time the buzzer of the device sounds and the red light of the first indicator U5 flashes, and it is determined that the catenary is normally energized at this time;

[0061] (2) When the detected DC voltage is 250V - 1000V, at this time the buzzer of the device sounds and the blue light of the first indicator U5 lights up. At this time, it is determined that the catenary is inductively energized, and at the same time the discharge circuit is opened and automatic discharge starts;

[0062] (3) When the detected DC voltage is 24V - 600V, the buzzer does not sound and the blue light of the first indicator U5 lights up, and the discharge continues;

[0063] (4) When the detected DC voltage is 0V - 24V, the buzzer does not sound and the first indicator U5 does not light up, and the discharge ends.

[0064] Function test:

[0065] (1) Automatic integrated voltage detection and discharge test

[0066]

[0067] Through actual operation verification, the utility model can realize the integrated functions of power verification and discharging.

[0068] (2) The discharging time is less than 1 minute

[0069] It was tested 9 times in a certain vehicle depot. The discharging time of each operation was shortened from 90 minutes to within 1 minute, and the discharging time was significantly reduced.

[0070] The test data record form is as follows:

[0071]

[0072] By studying the principles of the existing technology, the utility model redesigned the schematic diagram and developed a new integrated power verification and discharging device. When operating in the catenary yard section, it can accurately judge the network voltage at the catenary end, quickly conduct power verification and automatically discharge, so as to improve the safety and operation efficiency of catenary maintenance operations.

[0073] By collecting and analyzing on-site data, the performance and reliability of the new power verification and discharging device were verified, and it was compared with the traditional DC 1500V audible and visual alarm power checker. The comparison results show that the new power verification and discharging device has significant advantages in the sectional power outage maintenance operations of catenary vehicle depots / parking lots. It can accurately judge the residual voltage state at the catenary end and quickly reduce it to the safe voltage range, which can help maintenance personnel quickly set corresponding safety protection measures and reduce the operation safety risks. At the same time, its fast discharging function can significantly shorten the discharging time at the catenary end and improve the operation efficiency. Through long-term practical application, this technology has broad application prospects in the field of catenary maintenance and repair.

[0074] In the embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only illustrative. For example, the division of the units can be a logical function division. In actual implementation, there can be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection between each other can be through some interfaces. The indirect coupling or communication connection of units or modules can be in an electrical or other form.

[0075] The units described as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0076] In addition, in each embodiment of the present utility model, each functional unit may be integrated into one processing unit, may exist separately as individual units physically, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model rather than to limit them. Although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present utility model may be modified or equivalently replaced without departing from the spirit and scope of the technical solutions, and they should all be covered by the scope of the claims of the present utility model.

Claims

1. A DC test and discharge integrated device, comprising an insulating rod, characterized in that: The insulating rod is provided with a detachable grounding wire on its rod body, and a discharge detection box is provided at the front end of the insulating rod. The detection box comprises a box body and a contact terminal provided at the front end of the box body for connecting to a DC contact network, and a contact network live detection circuit and a contact network discharge circuit are provided inside the box body; The contact network live detection circuit includes a contact network live judgment circuit module, a self-check and battery power self-check circuit module, and a contact network live alarm circuit module; The contact network discharge circuit comprises a contact network normal charge detection module, a contact network induction power detection module, a discharge loop module and a discharge display loop module.

2. The DC test and discharge integrated device according to claim 1, characterized in that: The contact network live judgment circuit module comprises a logic control NAND gate chip (U1), a first transistor (Q1), a second resistor (R2), a third resistor (R3), a fourth resistor (R4), a fifth resistor (R5), a sixth resistor (R6), a first capacitor (C1), a twenty-eighth resistor (R28), a twenty-ninth resistor (R29), a thirtieth resistor (R30), a thirty-first resistor (R31) and a thirty-second resistor (R32); The self-test and battery power self-test loop module comprises a voltage detection chip (U2), a first diode (D1), a second diode (D2), a third diode (D3), a second indicator light (U6), an eighth transistor (Q8), a seventh resistor (R7), an eighth resistor (R8), a thirty-sixth resistor (R36) and a thirty-seventh resistor (R37); The contact network live alarm circuit module comprises a sixth transistor (Q6), a nineteenth resistor (R19), a twentieth resistor (R20), a twenty-second resistor (R22), a twenty-third resistor (R23), a twenty-seventh resistor (R27), a third capacitor (C3), a buzzer (BUZZER1) and a first indicator light (U5); The chip model of the logic control NAND gate chip (U1) is HEF4093. After the 1A and 1B pins of the logic control NAND gate chip (U1) are connected to the 2Y pin, the 20th resistor (R20) and the 19th resistor (R19) are sequentially connected in series and then connected to the 2B pin of the logic control NAND gate chip (U1). The common connection point of the 20th resistor (R20) and the 19th resistor (R19) is sequentially connected in series to the third capacitor (C3) and the 22nd resistor (R22) and then connected to the base of the sixth transistor (Q6). The 1Y pin of the logic control NAND gate chip (U1) is connected to the common connection point of the third capacitor (C3) and the 22nd resistor (R22). The emitter of the sixth transistor (Q6) is grounded, and the collector of the sixth transistor (Q6) is connected to the buzzer (BUZZER1) and then connected to the power supply. The VDD pin of the logic control NAND gate chip (U1) is connected to the power supply, the 3Y pin of the logic control NAND gate chip (U1) is connected to the 2A pin, the 3A pin of the logic control NAND gate chip (U1) is connected to the 3B pin, and then connected in series with the sixth resistor (R6) and the fourth resistor (R4) in sequence, and then connected to the collector of the first transistor (Q1), the common connection point of the sixth resistor (R6) and the fourth resistor (R4) is connected in series with the first capacitor (C1) and the fifth resistor (R5) in sequence, and then connected to the power supply through the thirty-second resistor (R32); the common connection point of the fifth resistor (R5) and the thirty-second resistor (R32) is also connected to the collector of the first transistor (Q1), and the common connection point of the first capacitor (C1) and the fifth resistor (R5) is connected to the VSS pin of the logic control NAND gate chip (U1) and then grounded; The emitter of the first transistor (Q1) is connected to the base of the first transistor (Q1) through the second resistor (R2) and the emitter is grounded; the base of the first transistor (Q1) is connected in series with the third resistor (R3), the twenty-eighth resistor (R28), the twenty-ninth resistor (R29), the thirtieth resistor (R30) and the thirty-first resistor (R31) in sequence and then connected to the contact end of the device; the base of the first transistor (Q1) is also connected to the cathode of the first diode (D1); the anode of the first diode (D1) is connected in series with the seventh resistor (R7) and then connected to the anode of the third diode (D3); the cathode of the third diode (D3) is connected to the anode of the second diode (D2); the cathode of the second diode (D2) is connected to the VCC pin of the first voltage detection chip (U2); the RES pin of the first voltage detection chip (U2) is connected to the eighth resistor (R8) through the eighth resistor (R8). The first voltage detection chip (U2) is connected to the base of the eighth triode (Q8), and the GND pin of the first voltage detection chip (U2) is connected to the emitter of the eighth triode (Q8) and the emitter of the ninth triode (Q9) and then grounded; the second indicator light (U6) includes a third light-emitting diode and a fourth light-emitting diode with different light colors, and the positive electrodes of the two light-emitting diodes are connected to the positive electrode of the third diode (D3) through a thirty-seventh resistor (R37), and the common contact of the thirty-seventh resistor (R37) and the third diode (D3) is connected to the power supply through a switch (SW1); the collector of the eighth triode (Q8) is connected to the base of the ninth triode (Q9) through a thirty-sixth resistor (R36), and the common contact of the collector of the eighth triode (Q8) and the thirty-sixth resistor (R36) is connected to the cathode of the third light-emitting diode, and the collector of the ninth triode (Q9) is connected to the cathode of the fourth light-emitting diode; The first indicator light U5 includes a first light emitting diode and a second light emitting diode of different light colors. The anodes of the first light emitting diode and the second light emitting diode are both connected to a power source, and the cathode of the first light emitting diode is connected to the collector of the sixth transistor (Q6).

3. The DC test and discharge integrated device according to claim 1 or 2, characterized in that: The contact network normal live detection module comprises a second voltage detection chip (U3), a ninth resistor (R9), a tenth resistor (R10), a thirty-third resistor (R33), a thirty-fourth resistor (R34) and a thirty-fifth resistor (R35); The contact network induction detection module comprises an operational amplifier chip (U4), a thirteenth resistor (R13), a fourteenth resistor (R14), a fifteenth resistor (R15), a sixteenth resistor (R16), a seventeenth resistor (R17), an eighteenth resistor (R18), a second capacitor (C2), a third triode (Q3), and a fourth diode (D4); The discharge circuit module includes a field effect transistor (Q2), an eleventh resistor (R11), a twelfth resistor (R12), a twenty-fourth resistor (R24), and a twenty-fifth resistor (R25); The discharge display circuit module includes a fifth transistor (Q5) and a twenty-sixth resistor (R26); The VIN- pin of the operational amplifier chip (U4) is grounded through a sixteenth resistor (R16), and the pin is also connected to the VOUT pin through a seventeenth resistor (R17); the +VS pin of the operational amplifier chip (U4) is grounded through a second capacitor (C2), and the pin is also connected to the cathode of a fourth diode (D4), and the anode of the fourth diode (D4) is connected to the power supply; the VOUT pin of the operational amplifier chip (U4) is connected to the cathode of the third transistor (Q3) through a fifteenth resistor (R15); The base, the emitter of the third triode (Q3) is grounded, the collector of the third triode (Q3) is connected to the power supply through the fourteenth resistor (R14); on the other hand, the collector is also connected to the positive electrode of the sixth diode (D6), and the negative electrode of the sixth diode (D6) is grounded through the eighteenth resistor (R18); the common contact point of the sixth diode (D6) and the eighteenth resistor (R18) is connected to the 4A pin of the logic control NAND gate chip (U1); the -VS pin of the operational amplifier chip (U4) is grounded; The VIN+ pin of the operational amplifier chip (U4) is connected to the VCC pin of the second voltage detection chip (U3) through a thirteenth resistor (R13), and the VCC pin is connected in series with a thirty-fourth resistor (R34), a thirty-fifth resistor (R35), a thirty-third resistor (R33) and a ninth resistor (R9) in sequence, and then connected to the contact end of the device; the VCC pin is also connected to the GND pin of the second voltage detection chip (U3) through a tenth resistor (R10) and then grounded; the RES pin of the operational amplifier chip (U4) is connected to the positive electrode of the fifth diode (D5), and the negative electrode of the fifth diode (D5) is grounded through an eighteenth resistor (R18); The D pole of the field effect tube (Q2) is connected to the contact end of the device through an eleventh resistor R11. On the other hand, the D pole of the field effect tube (Q2) is also connected to the S pole of the field effect tube (Q2) through a twelfth diode (D12), and the common connection point between the twelfth diode (D12) and the S pole is grounded; the S pole of the field effect tube (Q2) is also connected to the G pole of the field effect tube (Q2) through a twenty-fifth resistor (R25), and the G pole is connected in series with a twenty-fourth resistor (R24) and a twenty-sixth resistor (R26) in sequence, and then connected to the base of the fifth triode (Q5); the emitter of the fifth triode (Q5) is grounded; The cathode of the second light emitting diode (D52) is connected to the collector of the fifth transistor (Q5).

4. The integrated DC test and discharge device according to claim 3, characterized in that: The power source is a battery.

5. The DC test and discharge integrated device according to claim 2, characterized in that: The model of the voltage detection chip (U2) is CN61C33.

6. The DC test and discharge integrated device according to claim 3, characterized in that: The model of the second voltage detection chip (U3) is CN61C33.

7. The integrated DC test and discharge device according to claim 3, characterized in that: The model of the operational amplifier chip (U4) is SGM8041.

Images