Intrinsic safety pilot module and mining equipment

Abstract

The utility model discloses an intrinsic safety pilot module and mining equipment, relates to the technical field of pilot modules, and solves the problem that the probability that a remote control cable is short-circuited is increased as the remote control distance of an existing pilot circuit is longer and longer, so that personal casualty accidents are caused. The intrinsically safe pilot module comprises a remote button, a remote control cable and a pilot controller, the remote button is electrically connected with the pilot controller through the remote control cable, and the pilot controller comprises an alternating-current transformer, a signal generating circuit, a signal discriminating circuit, an isolation driving circuit, a relay module, a rectifying and filtering module and a three-terminal voltage stabilizing module. The main output end of the alternating-current transformer is electrically connected with the rectifying and filtering module, the three-end voltage stabilizing module and the relay module in sequence and serves as a relay driving power supply, the auxiliary output end of the alternating-current transformer is electrically connected with the signal generating circuit, the signal discriminating circuit, the isolation driving circuit and the relay module in sequence, and the relay module is driven to be closed through the isolation driving circuit. The pilot circuit is suitable for the pilot circuit in the mining equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of pilot modules, and in particular belongs to an intrinsically safe pilot module. Background Technique

[0002] The connection circuit between a mine-used combined switch and a remote control button is called a pilot circuit. It is the control circuit that first receives command signals when controlling the main circuit to close (or) open, and it must be intrinsically safe. Since in underground coal mines, with the increase of the excavation power, the control method is becoming more and more centralized, and the remote control distance of the combined switch is getting longer and longer, resulting in an increased probability of the remote control cable being short-circuited. The phenomenon of self-starting of mine-used equipment such as coal shearers and conveyors will cause mechanical and electrical failures, thus causing personal injury accidents. Content of the Utility Model

[0003] The utility model provides an intrinsically safe pilot module, which solves the problem that with the increase of the remote control distance of the existing pilot circuit, the probability of the remote control cable being short-circuited increases, thus causing personal injury accidents.

[0004] To achieve the above object, the utility model provides the following solutions:

[0005] The utility model provides an intrinsically safe pilot module, which includes a remote button, a remote control cable and a pilot controller;

[0006] The pilot controller includes a signal generation circuit, a signal discrimination circuit, an isolation drive circuit and a relay module;

[0007] The remote button is used to be connected in series with the signal generation circuit and the signal discrimination circuit through the remote control cable;

[0008] The signal generation circuit is used to generate a pilot signal and send it to the signal discrimination circuit through the remote button and the remote control cable;

[0009] The signal discrimination circuit is used to provide a normal drive voltage for the isolation drive circuit according to the pilot signal;

[0010] The isolation drive circuit is used to drive the relay module to attract under the action of the drive voltage.

[0011] Further, there is also a preferred embodiment. The above signal discrimination circuit includes an A1 signal detection terminal, an A2 signal detection terminal, a capacitor, a second resistor, a second diode and a third resistor;

[0012] The remote button is connected to the A1 signal detection terminal and the A2 signal detection terminal respectively through the remote control cable;

[0013] The output terminal of the signal generation circuit is connected to the A1 signal detection terminal. The A1 signal detection terminal is connected to the A2 signal detection terminal through a remote button. The A2 signal detection terminal is connected to the input end of the capacitor and the output end of the second diode and is in series with the third resistor. The output end of the capacitor is connected to the input end of the second resistor, and the output end of the second resistor is connected to the input end of the second diode, so that the pilot signal generated by the signal generation circuit is sent to the signal discrimination circuit through the remote button and the remote control cable. The signal discrimination circuit provides a normal driving voltage for the isolation driving circuit according to the received pilot signal, and the isolation driving circuit drives the relay module to close under the action of the driving voltage.

[0014] Further, there is also a preferred embodiment. The above-mentioned remote button includes a normally open button and a first diode;

[0015] The normally open button is in series with the first diode, and the first diode is used to prevent reverse current flow.

[0016] Further, there is also a preferred embodiment. The above-mentioned signal generation circuit includes a first resistor and a pilot diode;

[0017] The output end of the first resistor is connected to the A1 signal detection terminal, and the pilot diode is used to rectify the current limited by the first resistor.

[0018] Further, there is also a preferred embodiment. The above-mentioned pilot controller further includes an AC transformer, a rectification and filtering module, and a three-terminal voltage stabilization module;

[0019] The main output terminal of the AC transformer is sequentially connected to the rectification and filtering module, the three-terminal voltage stabilization module, and the relay module, so that the rectification and filtering module rectifies the AC voltage provided by the AC transformer into a stable DC voltage, and the three-terminal voltage stabilization module converts the stable DC voltage into a DC voltage to provide a driving power supply for the relay module;

[0020] The secondary output terminal of the AC transformer is sequentially connected to the signal generation circuit, the signal discrimination circuit, the isolation driving circuit, and the relay module.

[0021] Further, there is also a preferred embodiment. The above-mentioned DC voltage is 24V.

[0022] Further, there is also a preferred embodiment. The above-mentioned AC transformer is implemented by a dual-output isolated power transformer.

[0023] The beneficial effects of the present utility model are:

[0024] 1. The intrinsically safe pilot module provided by the utility model realizes the suction of the relay module by charging the capacitor in the signal discrimination circuit with the pilot signal. At the same time, the remote control button and the remote control cable are connected in series on the pilot signal and the signal discrimination circuit, so that when the remote control cable is open or short-circuited, the transmission of the pilot signal is blocked, avoiding the problem of misoperation of electrical equipment in case of short circuit or open circuit of the remote control cable, thus ensuring the reliable operation of the power supply system in coal mines.

[0025] The utility model is applicable to the pilot circuit in mining equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only for further understanding of the embodiments of the present utility model and constitute a part of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. In the drawings:

[0027] Figure 1 is a schematic diagram of the composition of an intrinsically safe pilot module described in the present utility model;

[0028] Figure 2 is a schematic circuit diagram of the remote button of the intrinsically safe pilot module described in the present utility model;

[0029] Figure 3 is a schematic circuit diagram of the pilot controller of the intrinsically safe pilot module described in the present utility model.

[0030] Among them, T1 is a rectifier filter module; U1 is a three-terminal voltage regulator module; K1 is a relay module; R4 is a first resistor; D3 is a pilot diode; A1 is an A1 signal detection terminal; A2 is an A2 signal detection terminal; C3 is a capacitor; R6 is a second resistor; D2 is a second diode, R5 is a third resistor; K is an open button, D is a first diode. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The following will further describe in detail the specific embodiments of the present utility model in conjunction with the drawings and embodiments. The following embodiments will help those skilled in the art to further understand the present utility model, but do not limit the present utility model in any form. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several changes and improvements can still be made, and these all belong to the protection scope of the present utility model.

[0032] Embodiment 1. Refer to Figures 1 to 3To describe this embodiment, this embodiment provides an intrinsically safe pilot module, which includes a remote button, a remote control cable, and a pilot controller;

[0033] The pilot controller includes a signal generation circuit, a signal discrimination circuit, an isolation drive circuit, and a relay module;

[0034] The remote button is used to be connected in series between the signal generation circuit and the signal discrimination circuit through the remote control cable;

[0035] The signal generation circuit is used to generate a pilot signal and send it to the signal discrimination circuit through the remote button and the remote control cable;

[0036] The signal discrimination circuit is used to provide a normal drive voltage for the isolation drive circuit according to the pilot signal;

[0037] The isolation drive circuit is used to drive the relay module to close under the action of the drive voltage.

[0038] When this embodiment is actually applied, as Figure 1 shown, the intrinsically safe pilot module includes a remote button, a remote control cable, and a pilot controller; the pilot controller includes a signal generation circuit, a signal discrimination circuit, an isolation drive circuit, and a relay module; the remote button is connected in series between the signal generation circuit and the signal discrimination circuit through the remote control cable, so that the signal generation circuit generates a pilot signal and sends it to the signal discrimination circuit through the remote button and the remote control cable, and the signal discrimination circuit provides a normal drive voltage for the isolation drive circuit according to the pilot signal, so that the isolation drive circuit drives the relay module to close under the action of the drive voltage, realizing driving the electrical module to close in the way of the pilot signal, so that when the remote control cable is open or short-circuited, the transmission of the pilot signal is blocked, avoiding the occurrence of personal injury accidents caused by the short circuit or open circuit of the remote control cable.

[0039] Embodiment 2. Refer to Figure 2 and Figure 3 To describe this embodiment, this embodiment gives an example of the signal discrimination circuit in an intrinsically safe pilot module described in Embodiment 1;

[0040] The signal discrimination circuit includes an A1 signal detection terminal, an A2 signal detection terminal, a capacitor, a second resistor, a second diode, and a third resistor;

[0041] The remote button is respectively connected to the A1 signal detection terminal and the A2 signal detection terminal through the remote control cable;

[0042] The output terminal of the signal generation circuit is connected to the A1 signal detection terminal. The A1 signal detection terminal is connected to the A2 signal detection terminal through a remote button. The A2 signal detection terminal is connected to the input end of the capacitor and the output end of the second diode and is in series with the third resistor. The output end of the capacitor is connected to the input end of the second resistor. The output end of the second resistor is connected to the input end of the second diode, so that the pilot signal generated by the signal generation circuit is sent to the signal discrimination circuit through the remote button and the remote control cable. The signal discrimination circuit provides a normal driving voltage for the isolation driving circuit according to the received pilot signal. The isolation driving circuit drives the relay module to close under the action of the driving voltage.

[0043] In actual application of this embodiment, as Figure 3 shown, the signal discrimination circuit includes an A1 signal detection terminal, an A2 signal detection terminal, a capacitor, a second resistor, a second diode, and a third resistor;

[0044] Among them, the A1 signal detection terminal is electrically connected to the output terminal of the signal generation circuit. The A2 signal detection terminal is connected to the input end of the capacitor. The input end of the second resistor is connected to the output end of the capacitor. The output end of the second resistor is electrically connected to the input end of the second diode. The output end of the second diode is connected to the third resistor. The third resistor is in series with the A2 signal detection terminal, so that when the remote control button is activated, the pilot signal generated by the signal generation circuit enters the A1 signal detection terminal, passes through the first diode and the switch button in sequence through the remote control cable, and then enters the A2 signal detection terminal through the remote control cable. At this time, the pilot signal charges the capacitor, passes through the second resistor, the second diode, and the third resistor, so that the isolation driving circuit obtains a normal driving voltage to drive the relay module to close, thereby driving the local electrical equipment to operate. When a fault such as an open circuit or a short circuit occurs in the remote control cable, the pilot signal cannot charge the capacitor through the A2 signal detection terminal to meet the driving voltage requirement, so that the relay module cannot be driven to close by the isolation driving circuit, effectively improving the reliability and completely avoiding the misoperation problem caused by the short circuit or open circuit of the remote control cable.

[0045] Embodiment 3. Refer to Figure 2 To illustrate this embodiment, this embodiment gives an example of the remote button in an intrinsically safe pilot module described in Embodiment 2;

[0046] The remote button includes a normally open button and a first diode;

[0047] The normally open button is in series with the first diode, and the first diode is used to prevent reverse current flow.

[0048] In actual application of this embodiment, as Figure 2As shown, the remote button includes a normally open button and a first diode. The normally open button is connected in series with the first diode. The other end of the normally open button is connected to the A2 signal detection terminal through a remote control cable, and the other end of the first diode is connected to the A1 signal detection terminal, effectively ensuring a simple connection between the remote button and the pilot controller. At the same time, the pilot signal can be sent from the A1 signal detection terminal, enter the A2 signal detection terminal through the remote button.

[0049] Embodiment 4. Refer to Figure 3 To illustrate this embodiment, this embodiment is an example of the signal generation circuit in an intrinsically safe pilot module described in Embodiment 1.

[0050] The signal generation circuit includes a first resistor and a pilot diode.

[0051] The output end of the first resistor is connected to the A1 signal detection terminal, and the pilot diode is used to rectify the current limited by the first resistor.

[0052] In actual application of this embodiment, as Figure 3 shown, after being limited in current by the first resistor and then rectified by the pilot diode, the voltage signal becomes a pilot signal, which is connected to the A2 signal detection terminal through the remote button and the first diode is connected to the A1 signal detection terminal.

[0053] Embodiment 5. Refer to Figure 3 To illustrate this embodiment, this embodiment is an example of the pilot controller in an intrinsically safe pilot module described in Embodiment 1.

[0054] The pilot controller further includes an AC transformer, a rectification and filtering module, and a three-terminal voltage regulator module.

[0055] The main output terminal of the AC transformer is sequentially connected to the rectification and filtering module, the three-terminal voltage regulator module, and the relay module, so that the rectification and filtering module rectifies the AC voltage provided by the AC transformer into a stable DC voltage, and the three-terminal voltage regulator module converts the stable DC voltage into a DC voltage to provide a driving power supply for the relay module.

[0056] The secondary output terminal of the AC transformer is sequentially connected to the signal generation circuit, the signal discrimination circuit, the isolation drive circuit, and the relay module.

[0057] In actual application of this embodiment, as Figure 3As shown in the figure, the main output terminal of the AC transformer is electrically connected to the rectification and filtering module, the three-terminal voltage regulator module, and the relay module in sequence, serving as the relay drive power supply; the secondary output terminal of the AC transformer is electrically connected to the signal generation circuit, the signal discrimination circuit, the isolation drive circuit, and the relay module in sequence, and drives the relay module to close through the isolation drive circuit.

[0058] Specifically, the alternating current output from the main output terminal of the AC transformer becomes a stable DC power supply after being rectified by the rectification and filtering module, and outputs 24V DC power after passing through a three-terminal voltage regulator device for the drive power supply of the relay module. The AC voltage output from the secondary output terminal of the AC transformer is rectified by a pilot diode after being limited in current by a first resistor, making the voltage signal a pilot signal. It is connected to the A2 signal detection terminal through a switch button and to the A1 signal detection terminal through a first diode. When the switch button is activated, the pilot signal enters the A1 signal detection terminal, passes through the first diode and the switch button in sequence through a remote control cable, and then enters the A2 signal detection terminal through the remote control cable. At this time, the pilot signal charges the capacitor, and through the second resistor, the second diode, and the third resistor, the isolation drive circuit obtains a normal drive voltage to drive the relay module to close, thereby driving the local electrical equipment to operate. When a fault such as a break or short circuit occurs in the remote control cable, the pilot signal cannot charge the capacitor through the A2 signal detection terminal to reach the drive voltage requirement, so the relay module cannot be driven to close through the isolation drive circuit, effectively improving the reliability and completely avoiding the problem of misoperation caused by a short circuit or break in the remote control cable.

[0059] Embodiment Six: This embodiment gives an example of the DC voltage in an intrinsically safe pilot module described in Embodiment Five;

[0060] The three-terminal voltage regulator module converts the stable DC voltage into 24V DC voltage to provide a drive power supply for the relay module.

[0061] Embodiment Seven: This embodiment gives an example of the AC transformer in an intrinsically safe pilot module described in Embodiment Five;

[0062] The AC transformer is implemented by a dual-output isolated power transformer.

[0063] Embodiment Eight: This embodiment provides an example of a mining equipment implemented by using an intrinsically safe pilot module described in any one of Embodiments One to Seven;

[0064] In actual application of this embodiment, the intrinsically safe pilot module is used in mining equipment to avoid the problem that the long remote control distance of the combined switch increases the probability of the remote control cable being short-circuited, resulting in the self-start phenomenon of mining equipment such as shearers and conveyors, and further leading to mechanical and electrical failures and causing personal injury accidents.

[0065] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0066] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0067] The above are only the embodiments of the present utility model and do not limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the scope of the claims of the present utility model.

Claims

1. Intrinsically safe pilot module, characterized in that: The module includes a remote button, a remote control cable and a pilot controller; The pilot controller includes a signal generating circuit, a signal identifying circuit, an isolation driving circuit and a relay module; The remote button is used to be connected in series with the signal generating circuit and the signal identifying circuit via a remote control cable; The signal generating circuit is used to generate a pilot signal and send it to the signal identification circuit through a remote button and a remote control cable; The signal identification circuit is used to provide a normal driving voltage for the isolation driving circuit according to the pilot signal; The isolation drive circuit is used to drive the relay module to be attracted under the action of the drive voltage; The signal identification circuit includes an A1 signal detection terminal, an A2 signal detection terminal, a capacitor, a second resistor, a second diode and a third resistor; The signal generating circuit comprises a first resistor and a pilot diode; The output end of the first resistor is connected to the A1 signal detection terminal, and the pilot diode is used to rectify the current after the current is limited by the first resistor; The remote button is connected to the A1 signal detection terminal and the A2 signal detection terminal respectively through a remote control cable; The output end of the signal generating circuit is connected to the A1 signal detection terminal, and the A1 signal detection terminal is connected to the A2 signal detection terminal through a remote button. The A2 signal detection terminal is connected to the input end of the capacitor and the output end of the second diode and is connected in series with a third resistor. The output end of the capacitor is connected to the input end of the second resistor, and the output end of the second resistor is connected to the input end of the second diode, so that the pilot signal generated by the signal generating circuit is sent to the signal identification circuit through the remote button and the remote control cable. The signal identification circuit provides a normal driving voltage for the isolation drive circuit according to the received pilot signal, and the isolation drive circuit drives the relay module to be attracted under the action of the driving voltage.

2. The intrinsically safe pilot module according to claim 1, characterized in that: The remote button includes a normally open button and a first diode; The normally open button is connected in series with a first diode, and the first diode is used to prevent current from flowing in reverse direction.

3. The intrinsically safe pilot module according to claim 1, characterized in that: The pilot controller also includes an AC transformer, a rectifier and filter module, and a three-terminal voltage stabilization module; The main output end of the AC transformer is connected to the rectification and filtering module, the three-terminal voltage stabilization module and the relay module in sequence, so that the rectification and filtering module rectifies the AC voltage provided by the AC transformer into a stable DC voltage, and the three-terminal voltage stabilization module converts the stable DC voltage into a DC voltage to provide a driving power supply for the relay module; The secondary output end of the AC transformer is connected to the signal generating circuit, the signal identifying circuit, the isolation driving circuit and the relay module in sequence.

4. The intrinsically safe pilot module according to claim 3, characterized in that: The DC voltage is 24V.

5. The intrinsically safe pilot module according to claim 3, characterized in that: The AC transformer is implemented by a dual-channel output isolation power transformer.

6. Mining equipment, characterized in that: The mining equipment is realized based on the intrinsically safe pilot module described in any one of claims 1-5.

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