Explosion-proof starting control cabinet for inflammable and explosive gas compressor

Abstract

The utility model discloses an explosion-proof starting control cabinet for a flammable and explosive gas compressor. Comprising a cabinet body, a partition plate, an electric control module, a starting module and a power input circuit, the partition plate is arranged in an inner cavity of the cabinet body, a wiring hole is formed in the partition plate, the partition plate divides the inner cavity of the cabinet body into an upper cavity body and a lower cavity body, the electric control module is arranged in the upper cavity body, and the starting module is arranged in the lower cavity body; the power input circuit is electrically connected with the starting module and the electric control module, the starting module is electrically connected with the compressor, and the power input circuit provides 380V alternating current for the starting module; the electric control module comprises a PLC (Programmable Logic Controller) and a transformer, the transformer is connected with the power supply input circuit, and the transformer provides 220V alternating current for the PLC; the electric control module collects temperature and pressure data of the compressor and controls the starting module through the PLC. The occupied space of the explosion-proof cabinet is greatly reduced, the size of the compressor is reduced, and installation and transportation are facilitated.

Description

Technical field:

[0001] The utility model belongs to the technical field of inflammable and explosive gas compressors, and particularly relates to an explosion-proof starting control cabinet for inflammable and explosive gas compressors. Background technology:

[0002] When the gas compressed by the compressor unit is flammable and explosive, the area where it is located is often an explosion-proof area, and the explosion-proof level is generally Class IIC, and a flameproof cabinet is often used. The principle of a flameproof cabinet is to enclose all the parts of the equipment that may ignite the explosive gas mixture in a shell, and the shell can withstand the internal explosion of the flammable mixture that penetrates into the shell through any joint surface or structural gap of the shell without damage, and can ensure that the internal flame gas reduces its energy when propagating through the gap, which is not enough to detonate the gas outside the shell.

[0003] The compressor's electric control part and the starter part require cables of different sizes because of different power supply voltages. Therefore, two separate explosion-proof cabinets are often used to realize the installation of the electric control part and the starter part inside the compressor. The two explosion-proof cabinets increase the occupied space and the size of the compressor, thus affecting the subsequent installation and transportation. In addition, the touch screen on the explosion-proof cabinet under the explosion-proof level CT4 is often not directly exposed to the outside. The information on the touch screen can only be viewed through the explosion-proof glass, and the touch screen cannot be directly operated, which is not conducive to on-site user operation, especially in terms of modifying the setting parameters. The explosion-proof cabinet needs to be opened to set it on the touch screen, which brings great inconvenience to the user.

[0004] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to a person skilled in the art. Utility model content:

[0005] The purpose of the utility model is to provide an explosion-proof starting control cabinet for an inflammable and explosive gas compressor, thereby overcoming the defects in the above-mentioned prior art.

[0006] To achieve the above-mentioned purpose, the utility model provides an explosion-proof starting control cabinet for flammable and explosive gas compressors, comprising a cabinet body, a partition, an electric control module, a starting module, and a power input circuit, wherein the partition is arranged in the inner cavity of the cabinet body, and a wiring hole is opened on the partition, and the partition divides the inner cavity of the cabinet body into an upper cavity and a lower cavity, the upper cavity is provided with an electric control module, and the lower cavity is provided with a starting module; the power input circuit is electrically connected to the starting module and the electric control module respectively, the starting module is electrically connected to the compressor, and the power input circuit provides 380V AC power for the starting module; the electric control module comprises a PLC controller and a transformer, the transformer is connected to the power input circuit, and the transformer provides 220V AC power for the PLC controller; the electric control module collects temperature and pressure data of the compressor, controls the starting module through the PLC controller, and further controls the start and close of the compressor.

[0007] Preferably, in the technical solution, the electronic control module includes a PLC controller, an analog input and output module, a transformer, a DC regulated power supply, an isolation barrier, an intermediate relay, a signal terminal, a circuit breaker, a relay control circuit, and a working circuit. A circuit breaker is provided between the transformer and the power input circuit, a relay control circuit is provided between the transformer and the DC regulated power supply, the DC regulated power supply is connected to the working circuit, the PLC controller is respectively connected to the analog input and output module and the intermediate relay, the analog input and output module is connected to the isolation barrier, the isolation barrier is connected to the compressor temperature and pressure acquisition equipment through the signal terminal, the intermediate relay is provided in the relay control circuit, and the relay control circuit is connected to the starting module; the transformer provides 220V AC power to the PLC controller, and the DC regulated power supply provides 24V DC power to the analog input and output module, the isolation barrier, and the intermediate relay.

[0008] Preferably, in the technical solution, the intermediate relay includes an intermediate relay coil and an intermediate relay switch. The intermediate relay switch is arranged in the relay control circuit. The intermediate relay coil is connected to the PLC controller. The DC regulated power supply provides 24V DC power to the intermediate relay coil. The intermediate relay coil is energized to close the intermediate relay switch.

[0009] Preferably, in the technical solution, the starting module includes a contactor and a thermal relay, the contactor is connected to the power input circuit, the contactor is electrically connected to the thermal relay, the thermal relay is electrically connected to the compressor, the contactor is located in the relay control circuit, and the power input circuit provides 380V AC power to the contactor and the thermal relay.

[0010] Preferably, in the technical solution, the contactor includes a contactor main circuit and a contactor coil. The contactor main circuit is electrically connected to the thermal relay, the contactor coil is located in the relay control circuit, the power input circuit provides 380V AC power to the contactor main circuit, and the transformer provides 220V AC power to the contactor coil; when the intermediate relay switch is closed, the contactor coil is energized, the contactor main circuit is closed, and the compressor is energized.

[0011] Preferably, in the technical solution, openings are provided on the upper cavity and the lower cavity of the cabinet, panels are provided at the openings, and external input display devices are provided on the panels, and the external input display devices include indicator lights, touch screens, explosion-proof mice, and buttons, wherein the indicator lights and explosion-proof mice are located on the panel of the upper cavity, the buttons are located on the panel of the lower cavity, the touch screen is located below the panel of the upper cavity, and explosion-proof glass is provided on the panel of the upper cavity at a position corresponding to the touch screen; the touch screen and buttons are respectively connected to the PLC controller, the touch screen is located in the working circuit, the explosion-proof mouse is connected to the touch screen, and the indicator lights are located in the relay control circuit and the working circuit; the touch screen can be operated and parameters can be set through the explosion-proof mouse without opening the explosion-proof cabinet.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The compressor electric control part and the starting part are integrated into an explosion-proof cabinet. At the same time, the electric control part and the starting part are respectively set in two relatively independent areas above and below through the partition. The power input circuit, transformer and DC regulated power supply are organically combined to meet the power demand of different modules, greatly reducing the space occupied by the explosion-proof cabinet, reducing the size of the compressor, and facilitating installation and transportation. By setting an external explosion-proof mouse, the touch screen can be operated and parameters can be set without opening the explosion-proof cabinet. Description of the drawings:

[0014] Figure 1 This is the main view of the explosion-proof starting control cabinet for the flammable and explosive gas compressor of the utility model;

[0015] Figure 2 This is a left view of the explosion-proof starting control cabinet for the flammable and explosive gas compressor of the utility model;

[0016] Figure 3 This is a schematic diagram of the internal structure of the upper cavity of the utility model;

[0017] Figure 4 This is a schematic diagram of the internal structure of the lower cavity of the utility model;

[0018] Figure 5 This is the electrical schematic diagram of the electric control part of the utility model;

[0019] Figure 6This is the electrical schematic diagram of the starting part of the utility model. Specific implementation method:

[0020] The specific implementation modes of the present invention are described in detail below, but it should be understood that the protection scope of the present invention is not limited by the specific implementation modes.

[0021] Unless explicitly stated otherwise, throughout the specification and claims, the term “comprise” or variations such as “include” or “comprising”, etc., will be understood to include the stated elements or components but not to exclude other elements or components.

[0022] like Figure 1-2 As shown, an explosion-proof starting control cabinet for an inflammable and explosive gas compressor comprises a cabinet 1, a partition 2, an electric control module 3, a starting module 4, and a power input circuit, wherein the partition 2 is arranged in the inner cavity of the cabinet 1, and a wiring hole is opened on the partition 2, and an explosion-proof cable gland is installed at the wiring hole, and the partition 2 divides the inner cavity of the cabinet 1 into an upper cavity 10 and a lower cavity 11, the upper cavity 10 is provided with the electric control module 3, and the lower cavity 11 is provided with the starting module 4; a large current terminal 17 and a small current terminal 18 are arranged at the bottom of the cabinet 1, and the power input circuit is connected to the large current terminal 17 and the small current terminal 18 respectively, the large current terminal 17 is electrically connected to the starting module 4, the small current terminal 18 is electrically connected to the electric control module 3, and the starting module 4 is electrically connected to the main motor of the compressor.

[0023] like Figure 3 As shown, the electric control module 3 includes a PLC controller 30, an analog input and output module 31, a transformer 32, a DC regulated power supply 33, an isolation barrier 34, an intermediate relay 35, a signal terminal 36, a circuit breaker 37, a relay control circuit, and a working circuit. A circuit breaker 37 is provided between the transformer 32 and the power input circuit 5, a relay control circuit is provided between the transformer 32 and the DC regulated power supply 33, the DC regulated power supply 33 is connected to the working circuit, the PLC controller 30 is respectively connected to the analog input and output module 31 and the intermediate relay 35, and the analog The input-output module 31 is connected to the isolation barrier 34, and the isolation barrier 34 is connected to the compressor temperature and pressure acquisition equipment through the signal terminal 36. The intermediate relay 35 includes an intermediate relay coil and an intermediate relay switch. The intermediate relay switch is arranged in the relay control circuit. The intermediate relay coil is connected to the PLC controller 30, and the relay control circuit is connected to the starting module 4; the transformer 32 provides 220V AC power to the PLC controller 30, and the DC regulated power supply 33 provides 24V DC power to the analog input-output module 31, the isolation barrier 34, and the intermediate relay coil.

[0024] like Figure 4As shown, the starting module 4 includes a contactor 40 and a thermal relay 41. The contactor 40 includes a contactor main circuit and a contactor coil. The contactor main circuit is electrically connected to the thermal relay 41. The contactor coil is located in the relay control circuit. The transformer 32 provides 220V AC power to the contactor coil. The thermal relay 41 is electrically connected to the compressor main motor. The power input circuit provides 380V AC power to the contactor main circuit and the thermal relay 41.

[0025] like Figure 1 As shown, the upper cavity 10 and the lower cavity 11 of the cabinet 1 are provided with openings, and the openings are provided with panels 12, and the panel 12 is provided with an external input display device, and the external input display device includes an indicator light 13, a touch screen 14, an explosion-proof mouse 15, and a button 16, wherein the indicator light 13 and the explosion-proof mouse 15 are located on the panel 12 of the upper cavity 10, the button 16 is located on the panel 12 of the lower cavity 11, the touch screen 14 is located below the panel 12 of the upper cavity 10, and explosion-proof glass is provided at a position corresponding to the touch screen 14 on the panel 12 of the upper cavity 10; the touch screen 14 and the button 16 are respectively connected to the PLC controller 30, the touch screen 14 is located in the working circuit, the explosion-proof mouse 15 is connected to the touch screen 14, and the indicator light 13 is located in the relay control circuit and the working circuit; the touch screen 14 can be operated and parameters can be set through the explosion-proof mouse 15 without opening the explosion-proof cabinet.

[0026] like Figure 5-6As shown, 380V AC passes through the small current terminal and circuit breaker QL1, and enters the transformer. The transformer converts 380V AC into 220V AC to power the PLC controller and contactor coils KM1-KM6. The 220V AC enters the DC regulated power supply T2 and is converted into 24V DC to power the analog input and output modules, isolation barriers ae, intermediate relay coils KA1-KA10, touch screens, and buttons. 380V AC flows through the large current terminal to the contactor main circuit KM3-KM5, FR3 thermal relay, and compressor main motor. The intermediate relay coils KA1-KA10 are connected to the PLC controller ports DQa and DQb, the buttons are connected to the PLC controller ports DIb and DIc, the isolation barrier a is connected to the analog input and output module ports 120-123, the isolation barrier b is connected to the analog input and output module ports 124-127, the isolation barrier c is connected to the analog input and output module ports 128-131, the isolation barrier d is connected to the analog input and output module ports 132-135, and the isolation barrier e is connected to the analog input and output module ports 136-137. The pressure transmitter collects the compressor intake pressure output 4-20mA signal and is connected to the isolation barrier a through the signal terminals 420-421, and the pressure transmitter collects the compressor host intake pressure output 4-20mA signal and is connected to the isolation barrier a through the signal terminals 422-423. The pressure transmitter collects the compressor main exhaust pressure and outputs a 4-20mA signal, which is connected to the isolation fence b through the signal terminals 424-425. The pressure transmitter collects the compressor oil pressure and outputs a 4-20mA signal, which is connected to the isolation fence b through the signal terminals 426-427. The pressure transmitter collects the compressor exhaust pressure and outputs a 4-20mA signal, which is connected to the isolation fence c through the signal terminals 428-429. The pressure transmitter collects the compressor electric three-way valve pressure and outputs a 4-20mA signal, which is connected to the isolation fence c through the signal terminals 430-431. The temperature thermal resistor PT100 collects the compressor intake temperature and outputs a 4-20mA signal, which is connected to the isolation fence d through the signal terminals 432-433. The temperature thermal resistor PT100 collects the compressor exhaust temperature and outputs a 4-20mA signal, which is connected to the isolation fence d through the signal terminals 434-435. The temperature thermal resistor PT100 collects the compressor lubricating oil temperature and outputs a 4-20mA signal, which is connected to the isolation fence e through the signal terminals 436-437.

[0027] The operator operates on the touch screen with an explosion-proof mouse to set parameters. The analog input and output module processes the collected compressor pressure and temperature signal data and sends them to the PLC controller. The PLC controller determines the compressor working status based on the compressor pressure and temperature data. When the compressor main motor is to be started, the intermediate relay coil KA2-KA3 is energized, the intermediate relay switch KA2-KA3 is closed, the contactor coil KM3-KM4 is energized, the contactor main circuit KM3-KM4 is closed, the FR3 thermal relay and the compressor main motor are energized and work, and the indicator lights in the corresponding circuits light up.

[0028] The electronic control part and the starting part of the compressor are integrated into an explosion-proof cabinet. At the same time, the electronic control part and the starting part are respectively arranged in two relatively independent areas at the upper and lower parts through partitions. The power input circuit, transformer and DC regulated power supply are organically combined to meet the power demand of different modules, which greatly reduces the space occupied by the explosion-proof cabinet, reduces the size of the compressor, and facilitates installation and transportation.

[0029] The foregoing description of specific exemplary embodiments of the utility model is for the purpose of illustration and illustration. These descriptions are not intended to limit the utility model to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the utility model and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the utility model and various different options and changes. The scope of the utility model is intended to be defined by the claims and their equivalents.

Claims

1. An explosion-proof starting control cabinet for a flammable and explosive gas compressor, characterized in that: It includes a cabinet, a partition, an electric control module, a starting module, and a power input circuit. The partition is arranged in the inner cavity of the cabinet, and a wiring hole is opened on the partition. The partition divides the inner cavity of the cabinet into an upper cavity and a lower cavity. The upper cavity is provided with an electric control module, and the lower cavity is provided with a starting module. The power input circuit is electrically connected to the starting module and the electric control module respectively, and the starting module is electrically connected to the compressor. The power input circuit provides 380V AC power for the starting module. The electric control module includes a PLC controller and a transformer. The transformer is connected to the power input circuit, and the transformer provides 220V AC power for the PLC controller. The electric control module collects temperature and pressure data of the compressor, and controls the starting module through the PLC controller.

2. The explosion-proof starting control cabinet for an inflammable and explosive gas compressor according to claim 1, characterized in that: The electric control module includes a PLC controller, an analog input and output module, a transformer, a DC regulated power supply, an isolation barrier, an intermediate relay, a signal terminal, a circuit breaker, a relay control circuit, and a working circuit. A circuit breaker is arranged between the transformer and the power input circuit, a relay control circuit is arranged between the transformer and the DC regulated power supply, the DC regulated power supply is connected to the working circuit, the PLC controller is respectively connected to the analog input and output module and the intermediate relay, the analog input and output module is connected to the isolation barrier, the isolation barrier is connected to the compressor temperature and pressure acquisition equipment through the signal terminal, the intermediate relay is arranged in the relay control circuit, and the relay control circuit is connected to the starting module; the transformer provides 220V AC power to the PLC controller, and the DC regulated power supply provides 24V DC power to the analog input and output module, the isolation barrier, and the intermediate relay.

3. The explosion-proof starting control cabinet for an inflammable and explosive gas compressor according to claim 2 is characterized in that: The intermediate relay includes an intermediate relay coil and an intermediate relay switch. The intermediate relay switch is arranged in a relay control circuit. The intermediate relay coil is connected to a PLC controller. A DC regulated power supply provides 24V DC power to the intermediate relay coil. When the intermediate relay coil is energized, the intermediate relay switch is closed.

4. The explosion-proof starting control cabinet for an inflammable and explosive gas compressor according to claim 3 is characterized in that: The starting module includes a contactor and a thermal relay. The contactor is connected to a power input circuit, the contactor is electrically connected to the thermal relay, the thermal relay is electrically connected to a compressor, the contactor is located in a relay control circuit, and the power input circuit provides 380V AC power to the contactor and the thermal relay.

5. The explosion-proof starting control cabinet for an inflammable and explosive gas compressor according to claim 4, characterized in that: The contactor includes a contactor main circuit and a contactor coil. The contactor main circuit is electrically connected to the thermal relay. The contactor coil is located in the relay control circuit. The power input circuit provides 380V AC power to the contactor main circuit, and the transformer provides 220V AC power to the contactor coil. When the intermediate relay switch is closed, the contactor coil is energized, the contactor main circuit is closed, and the compressor is energized.

6. The explosion-proof starting control cabinet for an inflammable and explosive gas compressor according to claim 5, characterized in that: The upper cavity and the lower cavity of the cabinet are provided with openings, and the openings are provided with panels. The panels are provided with external input display devices, and the external input display devices include indicator lights, touch screens, explosion-proof mice, and buttons. The indicator lights and explosion-proof mice are located on the panel of the upper cavity, the buttons are located on the panel of the lower cavity, the touch screen is located below the panel of the upper cavity, and explosion-proof glass is provided on the panel of the upper cavity at a position corresponding to the touch screen; the touch screen and the buttons are respectively connected to the PLC controller, the touch screen is located in the working circuit, the explosion-proof mouse is connected to the touch screen, and the indicator lights are located in the relay control circuit and the working circuit.

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