Digital electronic detonator control module and detonator allowed in coal mine

Abstract

The application relates to the technical field of civil blasting, in particular to a digital electronic detonator control module allowed in coal mines, which comprises a rectifier circuit, an LDO module, an initiating circuit, a preset delay chip and an initiating capacitor. The initiating circuit comprises a charging switch, an initiating switch, a preset delay module and a decoding module. The charging switch, the initiating switch, the preset delay module and the decoding module are sequentially connected with the initiating capacitor outside the preset delay chip. When the decoding module decodes, the charging switch is closed to connect the rectifier circuit and the initiating capacitor, so that the initiating capacitor is charged. After the initiating capacitor is charged, the preset delay module controls the initiating switch to be closed in delay, so that the initiating capacitor provides electric energy for the initiating element. The application is provided with the initiating circuit, so that the digital electronic detonator is safer when applied to the special environment of underground blasting in coal mines.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of civilian initiating explosive device, and particularly relates to a digital electronic detonator control module which is suitable for underground operation environment, meets the coal mine allowable standard, and meets the intrinsic safety standard. BACKGROUND

[0002] With the development of the application technology of the digital electronic detonator, the technical bottleneck of the digital electronic detonator product in a complex environment is continuously broken, and the product quality tends to be mature. However, the application of the digital electronic detonator in the special environment of the coal mine underground blasting has not been realized. The main reason is that the production environment of the coal mine underground has certain particularity, and the main characteristics are small section, complex surrounding environment, electromagnetism, high temperature, sulfur, humidity, and the generation of flammable gas. Therefore, the blasting equipment and the digital electronic detonator used in the coal mine underground must eliminate the safety hazard of static spark igniting gas.

[0003] At present, the coal mine allowable electric detonator blasting is still adopted in China, which will seriously restrict the technical level of the civilian explosive industry and the comprehensive popularization and application of the digital electronic detonator. How to make the digital electronic detonator eliminate the safety hazard of static spark igniting gas and apply the digital electronic detonator to the special environment of the coal mine underground blasting becomes a problem to be solved by people in the industry. SUMMARY

[0004] Therefore, it is necessary to provide a digital electronic detonator control module allowed by the coal mine in view of the above technical problems.

[0005] The first aspect of the application provides a preset delay chip allowed by the coal mine, which comprises the following inside the preset delay chip:

[0006] The rectifier circuit is used for converting the input alternating current into direct current and supplying power to other modules.

[0007] The LDO module is used for charging the working capacitor outside the preset delay chip.

[0008] The initiation circuit is used for controlling the charging of the initiation capacitor outside the preset delay chip and providing power for the initiation element. The initiation circuit comprises a charging switch, an initiation switch, a preset delay module and a decoding module, and the charging switch, the initiation switch, the preset delay module and the decoding module are sequentially connected with the initiation capacitor outside the preset delay chip. When the decoding module is decoded, the charging switch is closed to connect the rectifier circuit and the initiation capacitor, so that the initiation capacitor is charged. After the initiation capacitor is charged, the preset delay module controls the initiation switch to be closed in delay, so that the initiation capacitor provides power for the initiation element.

[0009] The second aspect of the application provides an electronic control module, which comprises the following:

[0010] The preset delay chip for coal mine use of the first aspect of the application;

[0011] A working capacitor, a first end of the working capacitor being connected with the input end of the LDO module, and a second end being grounded, for providing power for the preset delay chip;

[0012] A working capacitor protection circuit, a first end of the working capacitor protection circuit being connected with the input end of the LDO module, and a second end and a third end being connected with the first end and the second end of the bus respectively, for protecting the working capacitor;

[0013] An initiating capacitor, a first end of the initiating capacitor being connected with the charging switch and a first end of the initiating element, a second end of the initiating element being connected with the initiating switch, and a second end of the initiating capacitor being grounded, for providing power for the initiating element;

[0014] An initiating capacitor protection circuit, a first end of the initiating capacitor protection circuit being connected with the bus and the rectifier circuit, and a second end being grounded, for protecting the initiating capacitor.

[0015] In one of the embodiments, the working capacitor protection circuit comprises:

[0016] A first diode, a first end of the first diode being connected with the first end of the bus, and a second end being connected with the input end of the LDO module;

[0017] A second diode, a second end of the second diode being connected with the first end of the bus, and a first end being grounded;

[0018] A third diode, a second end of the third diode being connected with the second end of the bus, and a first end being grounded;

[0019] A fourth diode, a first end of the fourth diode being connected with the second end of the bus, and a second end being connected with the input end of the LDO module.

[0020] In one of the embodiments, the initiating capacitor protection circuit comprises:

[0021] A fifth diode, a first end of the fifth diode being connected with the first end of the bus, and a second end being connected with the rectifier circuit;

[0022] A sixth diode, a first end of the sixth diode being connected with the second end of the bus, and a second end being connected with the rectifier circuit;

[0023] A first resistor, a first end of the first resistor being connected with the rectifier circuit and the second end of the fifth diode, and a second end being grounded;

[0024] A second resistor, a first end of the second resistor being connected with the rectifier circuit and the second end of the sixth diode, and a second end being grounded.

[0025] In one of the embodiments, an anti-static circuit is further arranged on the bus, and the anti-static circuit comprises:

[0026] The first variable resistor has a first end connected to the first end of the bus and a second end connected to the ground.

[0027] The second variable resistor has a first end connected to the first end of the bus and a second end connected to the second end of the bus.

[0028] In one of the embodiments, the rectifier circuit is further connected in parallel with a communication module.

[0029] In one of the embodiments, the first end of the bus is connected with a third resistor and the second end of the bus is connected with a fourth resistor.

[0030] In one of the embodiments, the initiating element comprises a nichrome bridge wire capable of generating heat energy after being electrified, the nichrome bridge wire being dipped with a primer; or a MEPIC resistor; or a semiconductor bridge igniter.

[0031] In a third aspect, a digital electronic detonator is provided, and the digital electronic detonator comprises:

[0032] The digital electronic detonator control module of any one of the above embodiments;

[0033] A detonator shell;

[0034] An initiating agent.

[0035] The preset delay chip provided by the present application is provided with a preset delay module and a decoding module, so that after the decoding module is decoded, the charging switch is closed to connect the rectifier circuit and the initiating capacitor, so that the initiating capacitor is charged; after the initiating capacitor is charged, the preset delay module controls the initiating switch to be closed with a delay, so that the initiating capacitor provides electric energy for the initiating element, so that the digital electronic detonator is more secure when applied to the special environment of underground blasting of coal mines. The present application is also provided with a working capacitor protection circuit and an initiating capacitor protection circuit, which effectively prevent the residual electricity on the working capacitor and the initiating capacitor from being returned to the bus, eliminate the safety hazard of static spark igniting gas, and make the digital electronic detonator applicable to the special environment of underground blasting of coal mines, and promote the technical level of the civilian explosive industry and the comprehensive popularization and application of the digital electronic detonator. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 FIG. 1 is a structural schematic diagram of a digital electronic detonator control module for coal mines according to the present application. DETAILED DESCRIPTION

[0037] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the related drawings. The drawings show embodiments of the present application. However, the present application can be implemented in many different forms, and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application.

[0039] It is to be understood that the terms “first”, “second”, and etc. can be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, a first resistor can be called a second resistor without departing from the scope of the present application, and similarly, a second resistor can be called a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0040] It is to be understood that “connection” in the following embodiments, if the circuits, modules, units, etc. connected to each other have the transmission of electrical signals or data, should be understood as “electrically connected”, “communicatively connected” and the like.

[0041] As used herein, the singular forms “a”, “an” and “the” include plural referents unless the context clearly dictates otherwise. It is also to be understood that the term “comprising” or “including” or “having” and the like, specifies the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

[0042] As shown in FIG. 1, in one embodiment of the present application, a pre-set delay chip for coal mine license is provided, and the pre-set delay chip comprises: Figure 1

[0043] a rectifier circuit for converting input alternating current into direct current and powering other modules;

[0044] an LDO module for charging a working capacitor outside the pre-set delay chip;

[0045] an initiation circuit for controlling charging of an initiation capacitor outside the pre-set delay chip and providing power for an initiation element, the initiation circuit comprising a charging switch, an initiation switch, a pre-set delay module and a decoding module, the charging switch, the initiation switch, the pre-set delay module and the decoding module being connected with the initiation capacitor outside the pre-set delay chip in sequence; wherein, after decoding by the decoding module, the charging switch is closed to connect the rectifier circuit and the initiation capacitor, so as to charge the initiation capacitor; after charging of the initiation capacitor, the pre-set delay module controls the initiation switch to close with a delay, so as to provide power for the initiation element by the initiation capacitor. ​

[0046] In one embodiment of the present application, an electronic control module for coal mine license is provided, comprising: the preset delay chip U1 in the above embodiment; a working capacitor C1, a first end of the working capacitor C1 is connected with an input end of an LDO module, a second end is grounded, and the working capacitor C1 is used to provide power for the preset delay chip U1; a working capacitor protection circuit, a first end of the working capacitor protection circuit is connected with the input end of the LDO module, a second end and a third end are respectively connected with a first end BUS1 and a second end BUS2 of a bus, and the working capacitor protection circuit is used to protect residual electricity on the working capacitor C1 from being returned; an initiation capacitor C3, a first end of the initiation capacitor C3 is connected with a charging switch and a first end of an initiation element J2, a second end of the initiation element J2 is connected with an initiation switch, a second end of the initiation capacitor C3 is grounded, and the initiation capacitor C3 is used to provide power for the initiation element J2; and an initiation capacitor protection circuit, a first end of the initiation capacitor protection circuit is connected with the bus and a rectifier circuit, and a second end is grounded, and the initiation capacitor protection circuit is used to protect the initiation capacitor.

[0047] Specifically, the digital electronic detonator control module for coal mine license comprises: a preset delay chip U1, a working capacitor C1, an initiation capacitor C3, and an initiation capacitor protection circuit. The preset delay chip U1 is internally integrated with an LDO module, a rectifier circuit, a charging switch, and an initiation switch.

[0048] Specifically, a first end of the working capacitor C1 is connected with an input end of an LDO module in the preset delay chip U1 through a pin 2, a second end of the working capacitor C1 is grounded, and the working capacitor C1 is used to provide power for the preset delay chip U1. A first end of the working capacitor protection circuit is connected with the input end of the LDO module in the preset delay chip U1 through the pin 2. A second end and a third end of the working capacitor protection circuit are respectively connected with a first end and a second end of a bus, and the working capacitor protection circuit is used to protect residual electricity on the working capacitor C1 from being returned. The bus can charge the working capacitor C1 through the working capacitor protection circuit. When the working capacitor C1 is saturated, the power of the working capacitor C1 cannot pass through the working capacitor protection circuit, and therefore, the working capacitor protection circuit is used to protect the working capacitor C1.

[0049] Specifically, a first end of the initiation capacitor C3 is connected with a charging switch in the preset delay chip U1 through a pin 10, and the charging switch is used to control the bus to charge the initiation capacitor C3. The first end of the initiation capacitor C3 is also connected with a first end of an initiation element J2, and a second end of the initiation capacitor C3 is grounded. A second end of the initiation element J2 is connected with an initiation switch in the preset delay chip U1 through a pin 8 and a pin 9. When the preset delay chip U1 receives an initiation instruction, a decoding module decodes, the charging switch is closed to connect a rectifier circuit and the initiation capacitor C3, so that the initiation capacitor C3 is charged. After the initiation capacitor is charged, the preset delay module controls the initiation switch to delay closing,

[0050] The initiation capacitor C3 is short-circuited to the ground end by the initiation switch control, so that the initiation capacitor C3 provides power for the initiation element J2. The first end of the initiation capacitor protection circuit is connected with the bus and the internal rectifier circuit of the preset delay chip U1, and the second end is grounded, for protecting the residual electricity on the initiation capacitor C3 from returning to the bus.

[0051] In the embodiment, the digital electronic detonator control module allowed in coal mines effectively prevents the residual electricity on the working capacitor and the initiation capacitor from returning to the bus by setting the working capacitor protection circuit and the initiation capacitor protection circuit, and eliminates the safety hazard of static spark igniting gas. The digital electronic detonator can be applied to the special environment of underground blasting in coal mines, and promotes the technical level of the civilian explosive industry and the comprehensive popularization and application of the digital electronic detonator.

[0052] In one of the embodiments, the working capacitor protection circuit comprises: a first diode D5, a second diode D6, a third diode D4, and a fourth diode D3. The first end of the first diode D5 is connected with the first end BUS1 of the bus, and the second end is connected with the input end of the LDO module; the second end of the second diode D6 is connected with the first end BUS1 of the bus, and the first end is grounded; the second end of the third diode D4 is connected with the second end BUS2 of the bus, and the first end is grounded; and the first end of the fourth diode D3 is connected with the second end BUS2 of the bus, and the second end is connected with the input end of the LDO module.

[0053] Specifically, the working capacitor protection circuit rectifier bridge composed of the first diode D5, the second diode D6, the third diode D4, and the fourth diode D3 forms double protection with the internal rectifier bridge of the preset delay chip U1. Only the current on the bus can pass through to charge the working capacitor C1 in the working process, and the current flowing out of the working capacitor C1 is cut off, so as to protect the residual electricity on the working capacitor C1 from returning to the first end BUS1 and the second end BUS2 of the bus.

[0054] In the embodiment, the working capacitor protection circuit is a rectifier bridge composed of the first diode D5, the second diode D6, the third diode D4, and the fourth diode D3, which forms double protection with the internal rectifier bridge of the preset delay chip U1, so as to prevent the residual electricity on the working capacitor C1 from returning to the first end BUS1 and the second end BUS2 of the bus.

[0055] In one of the embodiments, the initiation capacitor protection circuit comprises: a fifth diode D7, the first end of the fifth diode D7 being connected with the first end BUS1 of the bus, and the second end being connected with the rectifier circuit; a sixth diode D8, the first end of the sixth diode D8 being connected with the second end BUS2 of the bus, and the second end being connected with the rectifier circuit; a first resistor R4, the first end of the first resistor R4 being connected with the rectifier circuit and the second end of the fifth diode D7, and the second end being grounded; and a second resistor R3, the first end of the second resistor R3 being connected with the rectifier circuit and the second end of the sixth diode D8, and the second end being grounded.

[0056] Specifically, the detonation capacitor protection circuit comprises a fifth diode D7, a sixth diode D8, a first resistor R4 and a second resistor R3. The fifth diode D7 and the sixth diode D8 are connected to the bus and connected to the rectifier circuit in the preset delay chip U1 through the pin 4 and the pin 5, so that the current in the bus can charge the detonation capacitor C3 through the fifth diode D7 and the sixth diode D8. After the detonation capacitor C3 is fully charged, the fifth diode D7 and the sixth diode D8 prevent the current of the detonation capacitor C3 from flowing into the bus.

[0057] The chip internal rectifier circuit makes the bus current more stable after passing through the rectifier circuit. The first resistor R4 and the second resistor R3 are connected to the rectifier circuit in the preset delay chip U1 through the pin 4 and the pin 5, so that the feedback information in the pin 4 and the pin 5 is returned.

[0058] In the embodiment, the detonation capacitor protection circuit comprises a fifth diode D7, a sixth diode D8, a first resistor R4 and a second resistor R3. The fifth diode D7 and the sixth diode D8 effectively prevent the residual electricity on the working capacitor C1 from flowing back into the bus first end BUS1 and the bus second end BUS2. The first resistor R4 and the second resistor R3 provide a feedback information return circuit for communication.

[0059] In one of the embodiments, the LDO module output end is also connected to the first end of the filter capacitor C2, and the second end of the filter capacitor C2 is grounded.

[0060] Specifically, the preset delay chip U1 is externally provided with a filter capacitor C2, which filters the power supply of the chip to improve the stability of the power supply.

[0061] In one of the embodiments, an anti-static circuit is further arranged on the bus. The anti-static circuit comprises a first varistor D2, a second varistor D1, the first end of the first varistor D2 is connected to the bus, and the second end is grounded. The first end of the second varistor D1 is connected to the bus first end BUS1, and the second end of the second varistor D1 is connected to the bus second end BUS2. The anti-static circuit is arranged at the first end and the second end of the bus, which further enhances the safety of the circuit.

[0062] In one of the embodiments, the rectifier circuit is further connected in parallel with a communication module.

[0063] Specifically, the rectifier circuit is connected to the detonation capacitor protection circuit and the bus outside the preset delay chip U1 through the pin 4 and the pin 5 in sequence. The pin 4 and the pin 5 are connected to the rectifier circuit, the voltage stabilizing circuit and the working capacitor C1 inside the chip, and the input voltage signal of the bus BUS1 and the bus BUS2 is converted into a stable voltage power supply to supply power to the preset delay chip U1.

[0064] The rectifier circuit is also connected in parallel with a communication module, so that the pin 4 and pin 5 of the preset delay chip U1 can detect the voltage difference between the bus BUS1 and the bus BUS2, and analyze the message sent by the initiator to the preset delay chip U1; the pin 4 and pin 5 are connected with the GND through a switching circuit inside the preset delay chip U1, so as to return the current signal with information to the initiator.

[0065] In one of the embodiments, the first end and the second end of the bus are respectively connected with the third resistor R1 and the fourth resistor R2, so as to limit the current of the bus.

[0066] In the embodiment, the initiating element J2 comprises: a nickel-chromium bridge wire capable of generating heat energy after being electrified, and the nickel-chromium bridge wire is dipped with a primer; or a MEPIC resistor; or a semiconductor bridge igniter.

[0067] In one of the embodiments, a digital electronic detonator is provided, which comprises the coal mine permitted digital electronic detonator control module in any of the above embodiments.

[0068] A detonator shell;

[0069] An initiating agent.

[0070] According to the digital electronic detonator, the multi-channel thermocouple measurement circuit in the above embodiment is adopted, so that all the beneficial effects of the coal mine permitted digital electronic detonator control module are achieved, and will not be described again.

[0071] The technical features of the above embodiments can be combined arbitrarily, and in order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the description.

[0072] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as the limitation of the patent scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A digital electronic detonator control module approved for use in coal mines, characterised in that, The coal mine permissible digital electronic detonator control module comprises a preset delay chip, The preset delay chip comprises: a rectifier circuit for converting input alternating current into direct current and powering other modules; an LDO module for charging a working capacitor outside the preset delay chip; an initiation circuit for controlling charging of an initiation capacitor outside the preset delay chip and providing power for an initiation element, the initiation circuit comprising a charging switch, an initiation switch, a preset delay module and a decoding module, the charging switch, the initiation switch, the preset delay module and the decoding module being connected with the initiation capacitor outside the preset delay chip in sequence; when the decoding module is decoded, the charging switch is closed to connect the rectifier circuit and the initiation capacitor, so that the initiation capacitor is charged; after the initiation capacitor is charged, the preset delay module controls the initiation switch to be closed in delay, so that the initiation capacitor provides power for the initiation element; The coal mine permissible digital electronic detonator control module further comprises: a working capacitor, a first end of the working capacitor being connected with an input end of the LDO module, a second end of the working capacitor being grounded, the working capacitor being used for providing power for the preset delay chip; a working capacitor protection circuit, a first end of the working capacitor protection circuit being connected with the input end of the LDO module, a second end and a third end of the working capacitor protection circuit being connected with a first end and a second end of a bus respectively, the working capacitor protection circuit being used for protecting the working capacitor; an initiation capacitor, a first end of the initiation capacitor being connected with the charging switch and an initiation element, a second end of the initiation element being connected with the initiation switch, a second end of the initiation capacitor being grounded, the initiation capacitor being used for providing power for the initiation element; an initiation capacitor protection circuit, a first end of the initiation capacitor protection circuit being connected with the bus and the rectifier circuit, a second end of the initiation capacitor protection circuit being grounded, the initiation capacitor protection circuit being used for protecting the initiation capacitor; The working capacitor protection circuit comprises: a first diode, a first end of the first diode being connected with the first end of the bus, a second end of the first diode being connected with the input end of the LDO module; a second diode, a second end of the second diode being connected with the first end of the bus, a first end of the second diode being grounded; a third diode, a second end of the third diode being connected with the second end of the bus, a first end of the third diode being grounded; a fourth diode, a first end of the fourth diode being connected with the second end of the bus, a second end of the fourth diode being connected with the input end of the LDO module; The initiation capacitor protection circuit comprises: a fifth diode, a first end of the fifth diode being connected with the first end of the bus, a second end of the fifth diode being connected with the rectifier circuit; a sixth diode, a first end of the sixth diode being connected with the second end of the bus, a second end of the sixth diode being connected with the rectifier circuit; a first resistor, a first end of the first resistor being connected with the rectifier circuit and the second end of the fifth diode, a second end of the first resistor being grounded; a second resistor, a first end of the second resistor being connected with the rectifier circuit and the second end of the sixth diode, a second end of the second resistor being grounded.

2. The coal mine permissible digital electronic detonator control module of claim 1, wherein, The output end of the LDO module is further connected with a first end of a filter capacitor, a second end of the filter capacitor being grounded.

3. The coal mine permissible digital electronic detonator control module of claim 1, wherein, The bus is further provided with an anti-static circuit, the anti-static circuit comprising: A first rheostat, the first end of which is connected to the bus, and the second end of which is grounded; A second rheostat, the first end of which is connected to the first end of the bus, and the second end of which is connected to the second end of the bus.

4. The coal mine permissible digital electronic detonator control module of claim 1, wherein, The rectifier circuit is also connected in parallel with a communication module.

5. The coal mine permissible digital electronic detonator control module of claim 1, wherein, The first end of the bus is connected with a third resistor, and the second end of the bus is connected with a fourth resistor.

6. The coal mine permissible digital electronic detonator control module of claim 1, wherein, The initiating element comprises: A nickel-chromium bridge wire capable of generating heat energy after being electrified, the nickel-chromium bridge wire being dipped with a priming agent; or a MEPIC resistor; or a semiconductor bridge firing element.

7. A digital electronic detonator, characterized in that, The application further relates to a digital electronic detonator control module for coal mines, comprising: A detonator shell; An initiating agent. ​

Images