Special control operation power supply device for underground high-voltage explosion-proof cabinet

Abstract

The utility model discloses a special control operation power supply device for an underground high-voltage explosion-proof cabinet, which belongs to the technical field of electrical tests and comprises an inversion unit, a transformer and a frequency converter. The inversion unit comprises an inverter, a power switch and a rechargeable battery; the inverter comprises a resistor R1, a resistor R2, a triode Q1 and a triode Q2; one end of the resistor R1 is connected with the base electrode of the triode Q1, and the other end of the resistor R1 is connected with the collector electrode of the triode Q2 and the output end of the high-voltage winding of the transformer; one end of the resistor R2 is respectively connected with the collector of the triode Q1 and the input end of the high-voltage winding of the transformer, and the other end is connected with the base of the triode Q2; the emitters of the triode Q1 and the triode Q2 are connected with the power switch; the power switch is connected with the negative electrode of the rechargeable battery; the positive electrode of the rechargeable battery is connected with the high-voltage winding of the transformer; and a secondary winding of the transformer is connected with the frequency converter, so that the technical problem of inaccurate test data caused by a no-voltage protection mechanism during an underground electrical test in the prior art is solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to electrical test technical field relates to a special control operation power supply device of downhole high pressure explosion -proof cabinet. BACKGROUND

[0002] In the field of mining, as the key equipment of power distribution and safety control, the performance and reliability of downhole high pressure explosion -proof cabinet are directly related to the safety and efficiency of mine operation. In order to ensure that the high pressure explosion -proof cabinet can still run stably under extreme and complex environment, it is particularly important to carry out periodic linkage test. This test process aims to verify the coordination of each electrical component, the sensitivity of protection device and the safety and reliability of overall system.

[0003] However, when carrying out the linkage test of downhole high pressure explosion -proof cabinet, the technical personnel face a technical challenge: the voltage transformer (PT) is usually installed on a movable trolley for daily maintenance and troubleshooting. According to the standard process, the trolley needs to be pulled to a specific test position when carrying out the linkage test. But this operation brings a problem: when the trolley is in the test position, its connection with the main circuit is disconnected, which causes the control power supply and protection device of the switch cabinet to be unable to provide the necessary power supply. More importantly, the voltage transformer cannot sense the system voltage in this state, which triggers the loss of voltage protection mechanism of the switch cabinet, so that the whole test cannot be carried out smoothly.

[0004] The loss of voltage protection mechanism is an important safety feature of high pressure explosion -proof cabinet, which aims to automatically cut off the power supply when the system voltage is lower than the preset threshold, so as to prevent the equipment from running under abnormal voltage conditions, thereby avoiding possible safety accidents. But in the test scene, this automatic protection mechanism becomes an obstacle to the test, because it will misjudge the system state and intervene in advance, resulting in inaccurate test data, and even unable to complete all test items. INVENTION CONTENTS

[0005] The utility model aims at solving the technical problem that the test data is inaccurate in the prior art when the downhole electrical test is carried out, and provides a special control operation power supply device for downhole high pressure explosion -proof cabinet.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] The utility model provides a special control operation power supply device for downhole high pressure explosion -proof cabinet, comprising an inverter unit, a transformer and a frequency converter.

[0008] The inverter unit comprises an inverter, a power switch and a rechargeable battery; the inverter comprises a resistor R1, a resistor R2, a triode Q1 and a triode Q2; one end of the resistor R1 is connected with the base of the triode Q1, and the other end is connected with the collector of the triode Q2 and the output end of the high-voltage winding of a transformer respectively; one end of the resistor R2 is connected with the collector of the triode Q1 and the input end of the high-voltage winding of the transformer respectively, and the other end is connected with the base of the triode Q2; the emitters of the triode Q1 and the triode Q2 are connected with the power switch; the negative pole of the rechargeable battery is connected with the power switch; the positive pole of the rechargeable battery is connected with the high-voltage winding of the transformer; and the secondary winding of the transformer is connected with a frequency converter.

[0009] Further, the well down high-pressure explosion-proof cabinet special control operation power supply device further comprises a shell, and the rechargeable battery is arranged on the bottom plate of the shell.

[0010] Further, the shell is a cuboid structure.

[0011] Further, the power switch is arranged on the long side of the shell.

[0012] Further, the long side of the shell is provided with a hole for fixing the power switch.

[0013] Further, the frequency converter is a three-phase output.

[0014] Further, the side of the shell is provided with an output end connected with the output of the frequency converter.

[0015] Further, the side of the shell is provided with a voltmeter and an ammeter; the voltmeter and the ammeter are connected with the output end of the frequency converter and used for measuring the voltage and the current of the output end.

[0016] Further, the side of the shell is provided with a handle.

[0017] Further, the shell further comprises an output control switch for controlling the output of the power supply device.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] The utility model discloses a control operation power supply device special for underground high pressure explosion -proof cabinet, through integrated high -performance inverter, this device can be the direct current energy of rechargeable battery efficient conversion into alternating current energy. The direct connection design of inverter and battery reduces the loss in the energy transmission process, and ensures the stability and reliability of power output simultaneously, provides the continuous, stable electric power support for the control operation of underground high pressure explosion -proof cabinet. The shell as the main structural component of the device not only protects the internal electrical components from the influence of the external environment, but also meets the explosion -proof requirements of the underground high pressure environment through special design. This greatly enhances the safety and stability of the equipment under harsh working conditions, reduces the risk of explosion caused by electrical failure. The combination of transformer and frequency converter in the device enables the power supply device to flexibly adjust the frequency and amplitude of the output voltage according to actual needs. This flexibility is crucial to meet the power supply needs of different electrical equipment, especially in the complex and variable working conditions underground, which can effectively ensure the normal operation of various control equipment. The power switch is arranged on the side of the shell, which is convenient for the operator to quickly turn on or off the power supply, simplifying the operation process. At the same time, the overall structure is compact, easy to install and maintain, reducing the difficulty and cost of underground operation.

[0020] Further, the utility model adopts cuboid structure design, not only make the whole device in physical form more neat, convenient for installation and deployment in the limited space underground, and optimize the layout of internal components, improve the space utilization. This compact structure design helps to reduce the occupied space of the device underground, reduce the influence on the working environment. The power switch is arranged on the long side of the shell, and this position selection makes the operator easily touch and operate the power switch during underground operation, without bending or complex body action. This design greatly improves the convenience and efficiency of operation, reduces the potential safety hazards caused by inconvenient operation. The hole design reserved on the long side of the shell is specially designed for fixing the power switch, which not only ensures the stable installation of the power switch, but also simplifies the installation process and reduces the need for additional fixing parts. At the same time, this design also facilitates subsequent maintenance and repair work, and the operator can easily disassemble and replace the power switch, reducing maintenance cost and time.

[0021] Further, the frequency converter is designed as three -phase output, and this characteristic makes the power supply device can satisfy the power supply demand of three -phase electrical equipment in the underground high pressure explosion -proof cabinet. Three -phase power supply system has higher efficiency and stability, can effectively reduce energy loss, improve the operation efficiency of electrical equipment. In the underground environment with complex and high demand for power, three -phase output capacity provides a solid guarantee for the stable operation of electrical equipment. The output end arranged on the side of the shell is connected with the output of the frequency converter, and this design makes the connection of electrical equipment more convenient. The operator can directly connect the electrical equipment with the power supply device through the output end, without complicated line arrangement and wiring work.

[0022] Further, the voltage and current meters arranged on the side of the housing are directly connected to the output of the frequency converter. This design allows the operator to monitor the voltage and current at the output of the power supply device in real time and intuitively. This real-time monitoring capability is crucial for ensuring the stable operation of the high-pressure explosion-proof cabinet and its connected equipment in the well. It helps to identify and address potential power issues in a timely manner. By regularly checking the readings of the voltage and current meters, the operator can understand the power status of the power supply device and its connected equipment, and thus develop more reasonable maintenance plans and management strategies. This data-based maintenance approach helps to improve the reliability and service life of the equipment, reducing downtime and maintenance costs caused by equipment failure.

[0023] Further, the handle is designed to allow the operator to easily carry and move the entire power supply device. In the downhole working environment, the power supply device may need to be adjusted in position according to the work requirements. The design of the handle greatly simplifies this process, improving the convenience and efficiency of the operation. Through the handle, the operator can flexibly move the power supply device to any desired position to meet the power requirements of different working areas in the well. This flexibility helps to optimize the work layout and improve overall work efficiency.

[0024] Further, the introduction of the output control switch allows the operator to more flexibly control the output of the power supply device. In downhole operations, the operator can turn on or off the power output at any time according to actual needs to meet the power supply requirements of different electrical equipment. This flexibility helps to improve work efficiency while reducing the risk of equipment failure caused by misoperation or improper power supply. The design of the output control switch provides an additional safety guarantee for the operator. In emergency situations such as electrical equipment failure or electric shock, the operator can quickly cut off the power output to avoid further deterioration of the situation. This emergency shutdown function is crucial for ensuring the safety of downhole operations. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be considered as limiting the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0026] Figure 1 For the present application, the circuit diagram of the control and operation power supply device for the downhole high-pressure explosion-proof cabinet is as follows:

[0027] Figure 2-a is the utility model, embodiment underground high pressure explosion-proof cabinet special control operation power supply device front view;

[0028] Figure 2 -b is the utility model, embodiment underground high pressure explosion-proof cabinet special control operation power supply device rear view;

[0029] Figure 2 -c is the utility model, embodiment underground high pressure explosion-proof cabinet special control operation power supply device right view;

[0030] Figure 2 -d is the utility model, embodiment underground high pressure explosion-proof cabinet special control operation power supply device top view.

[0031] Wherein: 1-ammeter;2-voltmeter;3-battery power display;4-charging port;5-output control switch;6-power switch;7-output;8-battery;9-inverter;10-frequency converter;11-handle. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. The components of the embodiments of the utility model described and indicated in the drawings can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative labor are within the scope of protection of the utility model.

[0034] It should be noted that: similar labels and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0035] In the description of the embodiments of the utility model, it needs to be explained that, if the terms "upper", "lower", "horizontal", "inner" and the like indicate the position or location relationship based on the position or location relationship shown in the drawings, or the position or location relationship of the utility model product in common use, it is only for the convenience of describing the utility model and simplifying the description, and it does not indicate or imply that the indicated device or element must have a specific position, structure and operation, therefore it cannot be understood as the limitation of the utility model. In addition, the terms "first", "second" and the like are only used for distinguishing the description, and cannot be understood as indicating or implying relative importance.

[0036] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0037] In the description of the embodiments of the utility model, it also needs to be explained that, unless otherwise explicitly specified and limited, if the terms "set", "install", "connect", "connect" appear, they should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific situation.

[0038] The utility model will be described in further detail below in combination with the drawings:

[0039] Referring to Figures 1-2 The utility model discloses a kind of control operation power supply devices special for underground high-pressure explosion-proof cabinet, comprising: by shell, inverter unit, transformer, frequency converter 10, voltmeter 2, ammeter 1 and handle 11 etc.;

[0040] The inverter unit includes inverter 9, power switch 6 and rechargeable battery 8;The inverter 9 includes resistance R1, resistance R2, triode Q1 and triode Q2;Resistance R1 one end is connected with the base of triode Q1, the other end is connected with the collector of triode Q2 and the output terminal of the high-voltage winding of transformer respectively;Resistance R2 one end is connected with the collector of triode Q1 and the input terminal of the high-voltage winding of transformer respectively, the other end is connected with the base of triode Q2;The emitter of triode Q1 and triode Q2 are connected with power switch 6;The negative pole of rechargeable battery 8 is connected with power switch;The positive pole of rechargeable battery 8 is connected with the high-voltage winding of transformer;The secondary winding of transformer is connected with frequency converter 10.

[0041] The shell is made of high-strength and corrosion-resistant aluminum alloy material to ensure its durability and explosion-proof performance in the harsh environment of the well.

[0042] A rechargeable battery 8 is fixedly installed on the bottom plate of the shell as an energy reserve of the entire power supply device. An inverter 9 is installed adjacent to the battery and is responsible for converting direct current into alternating current. A power switch 6 is selectively installed on one long side of the shell to facilitate the access and control of the operator. One end of the switch is connected to the output end of the rechargeable battery 8 through a wire, and the other end is connected to the input end of the inverter 9 to realize the opening and closing functions of the power supply. In order to facilitate installation, the long side is also provided with a hole matching the size of the power switch. The output end of the inverter 9 is connected to a transformer, and the transformer further adjusts the voltage level and then outputs to a frequency converter 10. The frequency converter 10 is designed as a three-phase output to meet the demand of the three-phase power supply of the high-pressure explosion-proof cabinet in the well. An output end 7 is provided on the other side (or appropriate position) of the shell and is directly connected to the output of the frequency converter 10 for use by the high-pressure explosion-proof cabinet in the well. In order to monitor the output state of the power supply device in real time, a voltmeter 2 and an ammeter 1 are also installed on the side of the shell and are connected to the output end of the frequency converter 10 to display the current output voltage and current values. In order to facilitate transportation and maintenance, a handle 11 is also provided on one side of the shell, so that the operator can easily move the entire device.

[0043] When installing the utility model, the installation position of the 12V battery base is marked on the aluminum alloy bottom plate in advance. An electric screwdriver is used to firmly fix the battery base on the bottom plate with screws to ensure that the battery is stable after installation. Inverter 9 welding: when selecting the installation position of the inverter 9, it is necessary to ensure that it is close to the 12V battery base to facilitate short-distance connection of the battery and the inverter 9. Use a spot welding machine or appropriate welding tool to weld the inverter 9 to the bottom plate, and pay attention to keep the welding point firm and not affect the installation of other components. On one long side of the aluminum alloy plate, use a drill or laser cutting machine to open three 10cm*5cm holes, which are used to install the voltmeter 2, ammeter 1 and power switch. Ensure that the hole edges are smooth to avoid scratching fingers or damaging components. The voltmeter 2, ammeter 1 and power switch are respectively installed in the holes through appropriate supports or directly, and are fixed with screws or buckles to ensure that they are stable and easy to operate. On one short side of the aluminum alloy plate, use a drill to open three small holes that are just large enough for the three-phase 100V output line of the frequency converter 10 to pass through. The output line is led out from these small holes to ensure that the cable is arranged neatly, and is fixed with cable clips or ties to avoid interference or damage inside.

[0044] The working process / working principle of the utility model is as follows:

[0045] When the power switch 6 is closed, the rechargeable battery 8 provides direct current power for the inverter 9, which converts it into alternating current, and after adjusting the voltage through the transformer, it is sent to the frequency converter 10 for frequency adjustment, and finally through the output end 7 to provide for the downhole high-voltage explosion-proof cabinet. The voltmeter 2 and the ammeter 1 display the output state in real time, and the battery power display 3 displays the power, so as to ensure the safe and stable operation of the power supply device. When the output control switch 5 is opened, the utility model outputs power for the special control operation power supply device for the downhole high-voltage explosion-proof cabinet.

[0046] The above is only the preferred embodiment of the utility model, and is not used for limiting the utility model. For those skilled in the art, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A dedicated control and operating power supply device for underground high-voltage explosion-proof cabinets, characterized in that, The inverter unit, the transformer and the frequency converter (10) are included. The inverter unit includes an inverter (9), a power switch (6) and a rechargeable battery (8); the inverter (9) includes a resistor R1, a resistor R2, a transistor Q1 and a transistor Q2; one end of the resistor R1 is connected with the base of the transistor Q1, and the other end is connected with the collector of the transistor Q2 and the output end of the high-voltage winding of the transformer respectively; one end of the resistor R2 is connected with the collector of the transistor Q1 and the input end of the high-voltage winding of the transformer respectively, and the other end is connected with the base of the transistor Q2; the emitter of the transistor Q1 and the emitter of the transistor Q2 are connected with the power switch (6) respectively; the negative pole of the rechargeable battery (8) is connected with the power switch; the positive pole of the rechargeable battery (8) is connected with the high-voltage winding of the transformer; the secondary winding of the transformer is connected with the frequency converter (10).

2. The well down high pressure explosion-proof cabinet special control operation power supply device according to claim 1, characterized in that, The housing is further included, and the rechargeable battery (8) is arranged on the bottom plate of the housing.

3. The well down high pressure explosion-proof cabinet special control operation power supply device according to claim 2, characterized in that, An output end (7) is arranged on the side of the housing and connected with the output of the frequency converter (10).

4. The well down high pressure explosion-proof cabinet special control operation power supply device according to claim 2, characterized in that, A voltmeter (2) and an ammeter (1) are arranged on the side of the housing; the voltmeter (2) and the ammeter (1) are connected with the output end of the frequency converter (10) and used for measuring the voltage and the current of the output end.

5. The well down high pressure explosion-proof cabinet special control operation power supply device according to claim 2, characterized in that, A handle (11) is arranged on the side of the housing.

6. The well down high pressure explosion-proof cabinet special control operation power supply device according to claim 2, characterized in that, An output control switch (5) is further included, and the output control switch (5) controls the output of the power supply device.

7. The well down high pressure explosion-proof cabinet special control operation power supply device according to claim 2, characterized in that, The housing is in the cuboid structure.

8. The well down high pressure explosion-proof cabinet special control operation power supply device according to claim 3, characterized in that, The power switch (6) is arranged on the long side of the housing.

9. The well down high pressure explosion-proof cabinet special control operation power supply device according to claim 3, characterized in that, Holes are arranged on the long side of the housing and used for fixing the power switch (6).

10. The well down high pressure explosion-proof cabinet special control operation power supply device according to claim 1, characterized in that, The frequency converter (10) is a three-phase output.

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