Portable multifunctional detector for combustor

Abstract

The utility model relates to the technical field of industrial combustor detection, in particular to a portable multifunctional detector for a combustor. The portable multifunctional detector for the combustor comprises a power supply module, a control module, two intermediate relays, a flame detector, a stop valve and a display and touch control unit. In the portable multifunctional detector for the combustor, two intermediate relays are respectively connected to a control module and are connected with a flame detector and a stop valve, a power supply module supplies power to the control module and a display and touch control unit, and the display and touch control unit is connected with the control module and is used for providing a user interaction interface. A timer system is integrated in the control module. According to the portable multifunctional detector for the combustor, a user interface is visual, operation is easy, the stability of a system is enhanced through the intermediate relay, the accuracy of detecting flameout and ignition protection time of the combustor is improved through the built-in timer, and the safety and reliability of use of the combustor are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial burner detection, in particular to a portable multifunctional burner detector. Background Art

[0002] According to relevant standards, when testing the burner, multiple aspects need to be covered to ensure the safety and efficiency of the burner. The test items include: interlock protection when the gas pressure is low, pre-purge and post-purge time, and ignition and flameout protection time. The interlock protection when the gas pressure is low ensures that when the gas supply pressure is lower than a certain set value, the burner can automatically cut off the power supply and stop running to prevent incomplete combustion or safety hazards caused by insufficient gas supply; the purge process is an important part of the start-up and shutdown of the burner. It can remove any residual gas that may exist in the combustion chamber, thereby reducing the risk of fire and explosion; the ignition protection is to ensure that when the ignition fails or the flame is accidentally extinguished, the burner can quickly cut off the gas supply to avoid gas leakage; the flameout protection is to ensure that once the flame is accidentally extinguished, the burner can cut off the gas supply within a specified time to prevent excessive gas accumulation.

[0003] Under the existing technology, when detecting the burner ignition and flameout protection time, the traditional detection method is to use a stopwatch for manual timing. Although this method is simple, it has limitations in accuracy. Since the protection time is calculated in seconds, the stopwatch timing may be affected by human operating errors, resulting in the final detection result being inaccurate. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] The utility model provides a portable multifunctional burner detector to overcome the problem that the existing technology has limitations in the accuracy of manual timing using a stopwatch, and the protection time may be affected by human operation errors, resulting in the problem that the final detection result is not accurate enough.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the utility model provides a portable burner multifunctional detector, comprising: a power module, a control module, two intermediate relays, a flame detector, a cut-off valve, and a display and touch unit;

[0008] The two intermediate relays include: a first intermediate relay and a second intermediate relay;

[0009] The first intermediate relay is connected to the flame detector and the control module respectively, and the second intermediate relay is connected to the cut-off valve and the control module respectively;

[0010] The power module is connected to the control module and the display and touch module respectively, and the display and touch module is connected to the control module;

[0011] A timer system is built into the control module.

[0012] Preferably, the power module is a rechargeable 24VDC power supply.

[0013] Preferably, the flame detector and the cut-off valve both have 220VAC signals.

[0014] Preferably, the intermediate relay is a relay with AC input and DC output functions, a coil is provided in the intermediate relay, the output end of the flame detector is connected to the coil of the first intermediate relay, the normally open contact of the first intermediate relay is connected to the input end of the control module, the output end of the cut-off valve is connected to the coil of the second intermediate relay, and the normally open contact of the second intermediate relay is connected to the input end of the control module.

[0015] Preferably, the control module is a Siemens S7-200 PLC controller, and the Siemens S7-200 PLC controller is respectively provided with an AI terminal, a DI terminal, a DO terminal, an AO terminal, an RS-485 port, an L+ terminal and an N- terminal.

[0016] Preferably, the display and touch control unit is a Kunlun Tongtai touch screen, and the display and touch control unit is connected to the control module via an RS-485 transmission wire.

[0017] Preferably, the display and touch control unit are respectively connected to the DO and DI terminals on the control module.

[0018] Preferably, the positive pole of the power module is connected to the L+ terminal of the control module, and the negative pole of the power module is connected to the N- terminal of the control module.

[0019] (III) Beneficial effects

[0020] The utility model provides a portable burner multifunctional detector, which can realize a more intuitive and easy-to-use user interface when the staff operates through a display and a touch unit, thereby reducing the complexity of operation; through the isolation effect of the intermediate relay, the stability and anti-interference ability of the system are enhanced, and the accuracy of signal transmission is guaranteed; through the built-in timer in the control module instead of the manual stopwatch timing, the timing accuracy in detecting the flameout protection time and the ignition protection time of the burner is improved, thereby achieving the purpose of improving the safety and reliability of the use of the burner. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The utility model shows a structural schematic diagram of a portable multifunctional burner detector.

[0022] Among them: 1: power module; 2: control module; 3: intermediate relay; 4: flame detector; 5: cut-off valve; 6: display and touch unit. DETAILED DESCRIPTION

[0023] The utility model is described in detail below with reference to the accompanying drawings and embodiments.

[0024] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by "up", "down", "left", "right", "inside", "outside", "top" and "bottom" are all based on the directions or positional relationships shown in the accompanying drawings. The purpose is only to facilitate the description of the present invention and simplify the description. It does not indicate or imply that the referred parts must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0025] like Figure 1 As shown, the utility model provides a portable burner multifunctional detector, comprising: a power module 1, a control module 2, two intermediate relays 3, a flame detector 4, a cut-off valve 5 and a display and touch unit 6;

[0026] The two intermediate relays 3 include: a first intermediate relay and a second intermediate relay. The intermediate relay is a relay that plays an isolating role in a circuit. The intermediate relay is used to transfer a signal from one circuit to another circuit without directly connecting the two circuits. The first intermediate relay is respectively connected to the flame detector 4 and the control module 2, and the second intermediate relay is respectively connected to the cut-off valve 5 and the control module 2. Both the flame detector 4 and the cut-off valve 5 are 220VAC signals. The intermediate relay 3 is a relay with AC input and DC output functions. A coil is provided in the intermediate relay 3. The output end of the flame detector 4 is connected to the coil of the first intermediate relay, and the normally open contact of the first intermediate relay is connected to the input end of the control module 2. The output end of the cut-off valve 5 is connected to the coil of the second intermediate relay, and the normally open contact of the second intermediate relay is connected to the input end of the control module 2.

[0027] The function of the intermediate relay 4 is to process the AC signals from the flame detector 4 and the shut-off valve 5, and convert these signals into DC signals for supplying to the control module 2. The flame detector 4 and the shut-off valve 5 are both high-voltage AC devices. Since the control module receives a DC signal, the intermediate relay 3 is required to complete the level conversion. The intermediate relay 3 has two main parts: a coil and a contact. When the flame detector 4 detects a flame or the shut-off valve 5 needs to be actuated, it will output an AC signal to the corresponding coil of the intermediate relay 3. In the coil, the AC signal will generate an alternating magnetic field. This magnetic field causes the normally open contacts in the contact group to close. Once the normally open contacts are closed, a low-voltage DC signal path will be formed at the input end of the control module 2, and the intermediate relay 3 will match the output voltage and output it to the control module 2.

[0028] The power module 1 is a rechargeable 24VDC power supply. The function of the power module 1 is to provide a stable working voltage for the entire system to maintain the normal operation of the system. The power module 1 is respectively connected to the control module 2 and the display and touch module 6 to power the two modules. The display and touch module 6 is connected to the control module 2 to ensure that the device can work normally without an external power supply, thereby realizing the function of portable detection. The control module 2 is a Siemens S7-200PLC controller. The Siemens S7-200PLC controller is a small programmable logic controller. The Siemens S7-200PLC controller is respectively provided with AI terminals, DI terminals, DO terminals, AO terminals and RS-485 ports. These interfaces are used for data exchange and control with other devices. The L+ terminal of the controller is connected to the positive pole of the power module 1, and the N- terminal is connected to the negative pole of the power module 1 to obtain a stable power supply.

[0029] The control module 2 has a built-in timer system. The control module 2 accurately calculates the time of ignition and flameout protection through the intermediate relay 3 connected to the flame detector 4 and the shut-off valve 5. Ignition and flameout protection are key functions to ensure the safe operation of the burner system. Ignition protection involves ensuring sufficient ignition time before the fuel is introduced into the combustion area to avoid the accumulation of unburned fuel. Flameout protection is to ensure sufficient cooling time after the combustion process is completed to prevent accidental ignition or overheating caused by premature contact with the fuel.

[0030] The display and touch unit 6 adopts the Kunlun Tongtai touch screen. The display and touch unit 6 is connected to the control module 2 through the RS-485 communication protocol. The RS-485 transmission wire usually includes two wires, a forward wire and a reverse wire, for differential signal transmission. The display and touch unit 6 is respectively connected to the DO and DI terminals on the control module 2. The control module 2 can send data to the display and touch unit 6, and can also receive commands from the display and touch unit 6. The positive pole of the power module 1 is connected to the L+ terminal of the control module 2 to power the control module 2, and the negative pole of the power module 1 is connected to the N- terminal of the control module 2 to form a loop to ensure that the current can flow through the control module 2 to enable it to work normally.

[0031] The following is a detailed introduction to the actual working scenario of a portable burner multi-function detector.

[0032] When the burner is tested for ignition protection, first ensure that the burner is in a stopped state, release the flame detection function, connect the portable burner multifunctional detector to the burner, turn on the portable burner multifunctional detector through the display and touch unit 6, start the burner to the pre-purge step, start the timer system in the control module 2, and complete the time recording when the flame detector 4 detects the flame, completing the recording of the burner ignition protection time once;

[0033] When performing a flameout protection test on the burner, first ensure that the burner is in a stopped state, check whether the flame detection device is working properly, connect the portable burner multi-function detector to the burner, turn on the portable burner multi-function detector through the display and touch unit 6, restart the burner and ensure that it can ignite normally and the flame is stable. When the burner is running, the flame detection signal is manually cut off to simulate the situation where the flame suddenly goes out, the timer system in the control module 2 is started, and when the burner shut-off valve 5 detects the valve closing signal, the time recording is completed, and the burner flameout protection time is recorded once.

[0034] It can be understood that the above-mentioned various embodiments mentioned in the present invention can be combined with each other to form a combined embodiment without violating the principle logic. Due to space limitations, the present invention will not elaborate on them.

[0035] Those skilled in the art will appreciate that, in the above method of specific implementation, the order in which the steps are written does not imply a strict execution order and does not constitute any limitation on the implementation process. The specific execution order of the steps should be determined by their functions and possible internal logic.

[0036] The utility model provides a portable burner multifunctional detector, which makes the user interface more intuitive and easy to use when the staff operates it through the display and touch unit 6, thereby reducing the complexity of operation; through the isolation effect of the intermediate relay 3, the stability and anti-interference ability of the system are enhanced, and the accuracy of signal transmission is guaranteed; the built-in timer in the control module 2 replaces the manual stopwatch timing, thereby improving the timing accuracy of the burner flameout protection time and the ignition protection time, thereby achieving the purpose of improving the safety and reliability of the use of the burner.

[0037] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A portable burner multifunctional detector, characterized in that: include: A power module (1), a control module (2), two intermediate relays (3), a flame detector (4), a cut-off valve (5), and a display and touch unit (6); The two intermediate relays (3) include: a first intermediate relay and a second intermediate relay; The first intermediate relay is respectively connected to the flame detector (4) and the control module (2), and the second intermediate relay is respectively connected to the cut-off valve (5) and the control module (2); The power module (1) is connected to the control module (2) and the display and touch unit (6) respectively, and the display and touch unit (6) is connected to the control module (2); The control module (2) has a built-in timer system.

2. The portable burner multifunctional detector according to claim 1, characterized in that: The power module (1) is a rechargeable 24VDC power supply.

3. The portable burner multifunctional detector according to claim 1, characterized in that: The flame detector (4) and the cut-off valve (5) both have 220VAC signals.

4. The portable burner multifunctional detector according to claim 3, characterized in that: The intermediate relay (3) is a relay having AC input and DC output functions. A coil is provided in the intermediate relay (3). The output end of the flame detector (4) is connected to the coil of the first intermediate relay. The normally open contact of the first intermediate relay is connected to the input end of the control module (2). The output end of the cut-off valve (5) is connected to the coil of the second intermediate relay. The normally open contact of the second intermediate relay is connected to the input end of the control module (2).

5. The portable burner multifunctional detector according to claim 1, characterized in that: The control module (2) is a Siemens S7-200 PLC controller, and the Siemens S7-200 PLC controller is respectively provided with an AI terminal, a DI terminal, a DO terminal, an AO terminal, an RS-485 port, an L+ terminal and an N- terminal.

6. The portable burner multifunctional detector according to claim 5, characterized in that: The display and touch control unit (6) is a Kunlun Tongtai touch screen, and the display and touch control unit (6) is connected to the control module (2) via an RS-485 transmission wire.

7. The portable multifunctional burner detector according to claim 6, characterized in that: The display and touch control unit (6) is respectively connected to the DO and DI terminals on the control module (2).

8. The portable burner multifunctional detector according to claim 5, characterized in that: The positive pole of the power module (1) is connected to the L+ terminal of the control module (2), and the negative pole of the power module (1) is connected to the N- terminal of the control module (2).

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