A charge metering device for medium-length hole blasting

Abstract

The utility model discloses a kind of charge quantity measuring devices of medium-length hole blasting, including measuring main part, feed assembly being located at the top of measuring main part, embedding in the weighing module of measuring main part inside, with the display control unit of weighing module electric connection, and located at the middle place of the bottom of measuring main part, discharge assembly;The measuring main part is the hollow cavity structure of top opening, the weighing module is horizontally laid in the middle place of the cavity of measuring main part, the flow regulating valve of feed assembly is butterfly valve structure, its control end extends to the outside of measuring main part, it is convenient for on-site personnel to manually fine-tune feed speed according to the characteristics of medicament (such as fluidity);The end of discharge pipe away from transition channel is equipped with quick connector, can be connected with subsequent blasting hole charging equipment (such as charging pipe) quickly, reduce the time of connection, further improve the convenience and flexibility of on-site operation.

Description

Technical Field

[0001] This utility model relates to the field of drug dosage measurement technology, and in particular to a drug dosage measurement device for medium-deep hole blasting. Background Technology

[0002] In engineering fields such as mining, highway and railway infrastructure, and tunnel excavation, medium-deep hole blasting is one of the core technologies for large-scale earthwork operations. Its blasting effect is directly related to the accuracy of the charge measurement. Excessive charge can easily lead to over-blasting, causing safety hazards such as damage to the surrounding rock stability and excessive flyrock, and also waste of the charge. Insufficient charge will result in under-blasting, which will lead to insufficient rock fragmentation, increase the cost of subsequent slag removal operations, and even affect the progress of the project.

[0003] However, the current method of charge measurement in medium-deep hole blasting still faces many technical challenges, making it difficult to meet the engineering requirements for accuracy, efficiency, and safety. Specific problems are as follows: 1. Low measurement accuracy and reliance on manual experience: Traditional explosive measurement often uses "volume estimation" (such as roughly judging the amount of explosive by the volume of the hopper) or "manual weighing in multiple stages". Volume estimation is easily affected by the looseness and moisture content of explosive agents (such as emulsion explosives and ammonium nitrate explosives), and the error can reach 10%-15%; manual weighing requires multiple handling and cumulative measurement, which is not only inefficient, but also easily reduces the accuracy due to human operation errors (such as deviation in weighing readings, spillage of explosives).

[0004] 2. Low level of automation and limited work efficiency: Some existing metering devices require manual intervention in valve opening and closing (such as feed cut-off and discharge control), which cannot realize the continuous process of "weighing-measuring-automatic feed stop-automatic discharge". Especially in large-scale blasting operations, frequent manual operation leads to low metering efficiency and is difficult to match the high-intensity operation requirements on site.

[0005] 3. Poor discharge stability and susceptibility to agent characteristics: Some blasting agents are hygroscopic or prone to caking at low temperatures. The discharge channels of existing devices are mostly straight cylindrical structures without insulation or anti-clogging design. Caking agents are prone to accumulate and blockage in the channels, leading to interruption of discharge. At the same time, unreasonable channel angle design (such as too small angle) will cause agent retention, further affecting the smooth delivery of metered agents.

[0006] 4. Weak corrosion resistance and short service life of the equipment: Some blasting agents (such as mixed agents containing nitrate and chloride) are corrosive. The inner walls of the cavity and channel of the existing metering device are mostly made of ordinary steel. Long-term contact with the agent will easily cause corrosion, which will not only contaminate the agent and affect the blasting performance, but also shorten the service life of the equipment and increase maintenance costs.

[0007] 5. Poor data traceability and high management difficulty: Traditional measurement methods lack data recording and transmission functions. The amount of explosives measured each time needs to be recorded manually, which is prone to problems such as data omission and tampering. It is impossible to form a complete measurement data chain, which is not conducive to subsequent blasting effect analysis, process optimization and safety traceability. Utility Model Content

[0008] In order to overcome the shortcomings of the existing technology, one of the objectives of this utility model is to provide a charge metering device for medium-deep hole blasting.

[0009] One of the objectives of this utility model is achieved through the following technical solution: A metering device for medium-deep hole blasting includes a metering body, a feeding assembly located at the top of the metering body, a weighing module embedded inside the metering body, a display control unit electrically connected to the weighing module, and a discharge assembly located at the bottom center of the metering body. The metering body is a hollow cavity structure with an open top. The weighing module is horizontally laid in the center of the cavity of the metering body, and the top of the weighing module forms a bearing surface for bearing the blasting agent. The metering body also has a transition channel inside. The feeding end of the transition channel corresponds to the bottom of the bearing surface of the weighing module and is connected to it. The discharge end of the transition channel is connected to the feeding end of the discharge assembly. An electric valve for controlling the on / off state is provided in the transition channel, and the electric valve is electrically connected to the display control unit.

[0010] As a further improvement to the above technical solution: The feeding assembly includes a feeding hopper adapted to the top opening of the metering body, and a flow regulating valve located at the outlet of the feeding hopper; the bottom of the feeding hopper is fixedly connected to the top of the metering body, the flow regulating valve is a butterfly valve structure, and the control end of the flow regulating valve extends to the outside of the metering body; when the weighing module detects that the weight of the explosive agent reaches a preset value, the display control unit triggers the flow regulating valve to close and simultaneously triggers the electric valve to open.

[0011] The discharge assembly includes a discharge pipe connected to the discharge end of the transition channel, and a heating and insulation sleeve fitted on the outside of the discharge pipe; the axis of the discharge pipe forms an angle of 15°-30° with the horizontal direction, and a quick-connect interface is provided at the end of the discharge pipe away from the transition channel; the axis of the transition channel forms an angle of 20°-40° with the horizontal direction, and the inner diameter of the transition channel gradually decreases from the inlet end to the outlet end.

[0012] The display control unit includes a display screen and operation buttons fixed to the outer wall of the metering body, and a controller built into the side wall of the metering body; the weighing module, electric valve, display screen, and operation buttons are electrically connected to the controller, and the controller is also connected to a wireless communication module for data transmission; after receiving the weight signal from the weighing module, if the weight reaches a preset threshold, the controller generates a valve switching command to control the electric valve to open and maintain it for a preset time.

[0013] The weighing module has an upwardly protruding baffle edge on the edge of its bearing surface, and the baffle edge is integrally formed with the weighing module.

[0014] The inner wall of the metering body is provided with a corrosion-resistant coating, which is a polytetrafluoroethylene coating and has a thickness of 0.5-1mm; the inner wall of the transition channel and the valve core surface of the electric valve are both provided with a corrosion-resistant coating of the same material.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. The device features a built-in horizontally laid weighing module, with its top forming a dedicated bearing surface. This allows for direct weight measurement of the blasting agent, replacing traditional volume estimation or manual weighing. The measurement error can be controlled within ±2%. Simultaneously, the weighing module has an integrated, molded edge to effectively prevent spillage of the agent during weighing, further ensuring the accuracy of the measurement data. Precise charge control avoids over-explosion or under-explosion problems, ensuring blasting operation safety, reducing agent waste, and lowering project costs.

[0016] 2. The display control unit's controller is electrically connected to the weighing module, the flow regulating valve of the feeding assembly, and the electric valve of the transition channel, forming a closed-loop automatic control: when the weighing module detects that the agent weight has reached the preset value, the controller can automatically trigger the flow regulating valve to close (stop feeding) and simultaneously open the electric valve (start discharging), completing the entire "feed-metering-discharging" process without manual intervention. This design significantly reduces manual operation steps, and in large-scale blasting operations, the metering efficiency is 3-5 times higher than traditional manual methods, effectively matching the high-intensity operation requirements on site.

[0017] 3. The discharge pipe axis of the discharge assembly forms an angle of 15°-30° with the horizontal direction, and the transition channel axis forms an angle of 20°-40° with the inner diameter gradually decreasing from the feed end to the discharge end. This angle and the tapering structure can utilize gravity to promote the smooth flow of the agent and avoid stagnation. At the same time, a heating and insulation sleeve is installed on the outside of the discharge pipe to keep the agent that is prone to caking warm and prevent condensation. This effectively solves the problem of agent caking and clogging the channel in low temperature or high humidity environments, ensuring continuous and stable discharge and reducing operation interruption time.

[0018] 4. The inner wall of the metering main cavity, the inner wall of the transition channel, and the surface of the electric valve core are all coated with a 0.5-1mm thick polytetrafluoroethylene (PTFE) corrosion-resistant coating. PTFE has excellent chemical stability and can withstand the corrosion of most explosive agents. This not only prevents the agents from being contaminated by metal corrosion (ensuring explosive performance) but also effectively delays equipment wear and tear, extending the service life of the equipment by 2-3 times compared to traditional uncoated devices, thus reducing equipment maintenance and replacement costs.

[0019] 5. The display control unit has a built-in wireless communication module. The controller can wirelessly transmit the dosage data (such as measurement time and dosage value) collected by the weighing module to the background management system. At the same time, the display screen can display the current measurement data in real time, which is convenient for on-site personnel to view. The automatic recording and transmission of data can form a complete measurement data chain, avoiding errors and omissions in manual recording, facilitating subsequent blasting effect analysis, process parameter optimization and safety responsibility traceability, and improving the level of precision in project management.

[0020] 6. The flow regulating valve of the feeding component is a butterfly valve structure, and its control end extends to the outside of the metering body, which makes it convenient for on-site personnel to manually fine-tune the feeding speed according to the characteristics of the agent (such as flowability); the end of the discharge pipe away from the transition channel is equipped with a quick-connect interface, which can be quickly connected to the subsequent blasting hole charging equipment (such as charging pipe), reducing connection time and further improving the convenience and flexibility of on-site operations.

[0021] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0022] Figure 1 This is a perspective view of this embodiment; Figure 2 This is a schematic diagram of the component discharge assembly in this embodiment; Figure 3 This is a schematic diagram of the component display control unit in this embodiment; Figure 4 This is a schematic diagram of the material outlet pipe of the component in this embodiment.

[0023] In the diagram: 1. Metering body; 10. Transition channel; 11. Electric valve; 2. Feeding assembly; 21. Feed hopper; 22. Flow regulating valve; 3. Weighing module; 31. Material stop; 4. Display control unit; 41. Display screen; 42. Operation buttons; 43. Controller; 5. Discharge assembly; 51. Discharge pipe; 52. Heating and insulation jacket; 53. Quick connector; 6. Corrosion-resistant coating. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0025] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0026] 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 invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] This embodiment takes a medium-deep hole blasting operation in a mining scenario as an example to provide a detailed description of the medium-deep hole blasting charge metering device of this utility model, ensuring that those skilled in the art can completely reproduce the device structure and workflow based on this embodiment.

[0028] I. Overall Structure and Installation Scenarios of the Device The dosage metering device in this embodiment adopts a movable design, and can be equipped with universal wheels with brakes at the bottom for easy movement on the blasting face in the mine. The core components of the device are: the metering body 1 as a load-bearing frame, the feeding component 2 fixed at the top, the weighing module 3 and the transition channel 10 embedded inside, the display control unit 4 fixed on the outer wall, and the discharge component 5 connected in the middle of the bottom; all metal parts requiring corrosion protection are coated with a corrosion-resistant coating 6, and the electrical components are connected by waterproof cables to ensure stable operation in the humid and dusty environment of the mine.

[0029] II. Detailed Composition of Each Component 1. Metering body 1, transition channel 10, electric valve 11 Composition details: The weighing body 1 is made of 304 stainless steel and has a hollow cavity structure with an open top. The cavity dimensions are 800mm long × 600mm wide × 500mm high, with a wall thickness of 5mm, ensuring structural strength while reducing overall weight (for easy movement). A horizontal mounting groove (10mm deep) is reserved in the middle of the cavity for embedding the weighing module 3; a circular through hole (150mm inner diameter) is opened in the middle of the bottom of the cavity, which is welded and fixed to the feed end of the transition channel 10.

[0030] The transition channel 10 is also made of 304 stainless steel and has a tapered tubular structure: the inner diameter of the feed end is 150mm (matching the bottom through hole of the metering body 1), the inner diameter of the discharge end is 120mm, the channel axis forms a 25° angle with the horizontal direction (meeting the design range of 20°-40° in the document), and the length is 300mm; a valve installation hole is opened in the middle section of the channel, and an electric valve 11 is built in.

[0031] The electric valve 11 is an electromagnetic butterfly valve, model D971X-10, with a nominal diameter of 120mm and a working pressure of 0.1MPa, which is compatible with the inner diameter of the discharge end of the transition channel 10. The valve core is coated with polytetrafluoroethylene (the same material as the corrosion-resistant coating 6), and the valve stem is connected to the outer wall of the transition channel 10 through a waterproof bearing to ensure smooth opening and closing and to prevent mine dust from entering the valve.

[0032] Core function: The metering body 1 provides an installation reference and temporary storage space for the reagents for all components; the transition channel 10 guides the weighed reagents to flow to the discharge component 5 by gravity through a tapered structure and tilt angle, avoiding reagent retention; the electric valve 11 serves as a key control node for "weighing-discharge", enabling accurate discharge of the reagents after the metering meets the standards.

[0033] 2. Feeding assembly 2 (including feed hopper 21 and flow regulating valve 22) Composition details: The feed hopper 21 has an inverted conical structure and is made of the same material as the metering body 1 (304 stainless steel). The hopper opening diameter is 500mm (to facilitate the receiving of bagged or bulk explosive agents), the hopper height is 300mm, and the hopper wall thickness is 3mm. The bottom of the feed hopper 21 is fixedly connected to the top opening (inner diameter 500mm) of the metering body 1 through a flange. An oil-resistant rubber gasket (unmarked) is installed between the flanges to prevent the agent powder from leaking out from the gap.

[0034] The flow regulating valve 22 is a manual butterfly valve, model D71X-10, with a nominal diameter of 150mm. It is installed at the discharge port of the feed hopper 21 (i.e., between the flange connecting the bottom of the feed hopper 21 and the top of the metering body 1). The valve's control handle (i.e., the "control end" mentioned in the document) extends to the outside of the metering body 1 with an extension length of 100mm. The handle surface is covered with an anti-slip rubber sleeve, which allows the operator to manually adjust the valve opening according to the flowability of the agent (e.g., emulsion explosives tend to stick to the wall, while ammonium nitrate explosives tend to loosen). This controls the feeding speed (the opening is adjustable from 0-100%, and the larger the opening, the faster the feeding speed).

[0035] Core function: The feed hopper 21 expands the receiving area of ​​the agent to prevent the agent from spilling during feeding; the flow regulating valve 22 can adjust the feeding rate in advance, and together with the subsequent automatic control, it can achieve "rapid feeding + precise replenishment" to balance metering efficiency and accuracy.

[0036] 3. Weighing module 3 (including material stop 31) Composition details: The weighing module 3 uses a resistance strain gauge weighing sensor group with a total of 4 sensors (evenly distributed at the four corners below the bearing surface), with a total range of 0-500kg and a graduation value of 0.1kg, which meets the metering requirements of 50-300kg of explosives per deep hole blasting in mines. The top of the sensor is fixed with an integrated bearing surface, which is a rectangular aluminum alloy plate (lightweight and high strength), with dimensions of 700mm long × 500mm wide and 8mm thick. It matches the internal dimensions of the measuring body 1 to ensure that the explosives can fall completely on the bearing surface.

[0037] The baffle 31 is integrally formed with the bearing surface (made by aluminum alloy die casting process), and protrudes upward along the four edges of the bearing surface with a height of 20mm. The inner side is rounded (radius 5mm) to prevent the agent from spilling due to slight shaking of the device during the weighing process, and to avoid the agent from accumulating at the edge and causing weighing errors.

[0038] The weighing module 3 is fixed in the mounting groove in the middle of the cavity of the metering body 1 by bolts. The sensor output line passes through the wire hole (with waterproof sealing ring) on ​​the side wall of the metering body 1 and is electrically connected to the controller 43 of the display control unit 4.

[0039] Core function: The material directly carries the explosive agent and converts the weight signal into an electrical signal, which is the core guarantee of measurement accuracy; the material stop 31 further eliminates the influence of external interference (such as shaking and spillage) on the measurement data, ensuring that the weighing error is ≤ ±0.2kg.

[0040] 4. Display control unit 4 (including display screen 41, operation buttons 42, controller 43, and wireless communication module 44) Composition details: The display screen 41 is a 5-inch industrial-grade LCD touch screen with a resolution of 800×480. It is waterproof and dustproof (IP65 protection level) and is fixed to the upper part of the outer wall of the metering body 1 with screws (height 1.2m, suitable for operators to stand and view). The display screen 41 can display the current weighing value, preset dosage value, status of electric valve 11 (open / closed), temperature of heating insulation jacket 52 and other information in real time. It supports touch operation (complementing the function of operation button 42).

[0041] The operation buttons 42 are a physically waterproof button group with a total of 5 buttons: "Power button", "Zero button", "Parameter setting button", "Manual feeding button" and "Manual discharging button". They are installed on the side wall of the metering body 1 below the display screen 41. The buttons have a travel of 2mm and provide clear feedback, making them easy for mine operators wearing gloves to use.

[0042] The controller 43 uses an STM32F103RCT6 microcontroller as its core chip and is built into a waterproof mounting box (unnumbered) inside the side wall of the metering body 1. The mounting box is fixed to the inside of the side wall with bolts. The input interface of the controller 43 is connected to the weighing module 3, the operation button 42, and the touch signal terminal of the display screen 41. The output interface is connected to the drive motor of the flow regulating valve 22, the electromagnetic coil of the electric valve 11, and the temperature controller of the heating and insulation jacket 52, realizing a closed loop of "signal acquisition-logic judgment-execution control".

[0043] The wireless communication module 44 uses the SIM800C4G module, which is connected to the serial port (UART) of the controller 43 via DuPont wires. The module antenna extends to the outside of the metering body 1 (to avoid signal shielding by the metal cavity). The module supports communication with the back-end server of the mine blasting operation management system and can upload the "time-dosage-operator" data of each measurement in real time (operator information is input through operation button 42).

[0044] Core function: As the "brain" of the device, it integrates the signals and control logic of all components; at the same time, through the display screen 41 and the wireless communication module 44, it realizes "on-site visual operation" and "remote data traceability" to meet the management needs of mining operations.

[0045] 5. Discharge assembly 5 (including discharge pipe 51, heating and insulation jacket 52, quick-connect interface 53) Composition details: The discharge pipe 51 is a seamless 304 stainless steel pipe with an inner diameter of 120mm (matching the inner diameter of the discharge end of the transition channel 10) and a length of 500mm. Its axis forms a 20° angle with the horizontal direction (meeting the design range of 15°-30° in the document). The inlet end of the discharge pipe 51 is fixedly connected to the discharge end of the transition channel 10 through a flange (an oil-resistant gasket is installed between the flanges), and the discharge end is welded with a quick-connect interface 53.

[0046] The heating and insulation jacket 52 is made of silicone and completely wraps the outer surface of the discharge pipe 51 (covering a length of 400mm). It has a power of 500W and an operating temperature range of 0-60℃. An aluminum foil reflective layer is provided on the inner side of the heating jacket where it is in contact with the discharge pipe 51 (to improve heating efficiency), and flame-retardant insulation cotton is wrapped on the outer side (to prevent heat loss). The temperature controller (unnumbered) of the heating and insulation jacket 52 is electrically connected to the controller 43 and can automatically start and stop according to the ambient temperature (automatically start when the ambient temperature is ≤10℃ and automatically shut down when it is ≥25℃).

[0047] The quick-connect interface 53 has a snap-fit ​​structure and is made of engineering plastic (PA66 + glass fiber). The inner ring is equipped with a sealing rubber ring (oil-resistant nitrile rubber). The inner diameter of the interface is 120mm, which is compatible with the explosive charging pipe commonly used in mines (outer diameter 120mm). It can be quickly connected / disconnected with the charging pipe by pressing the snap. After connection, the sealing performance is good and there is no leakage of explosives.

[0048] Core function: The metered agent is stably delivered to the blasting charging pipe; the heating and insulation sleeve 52 is designed for low-temperature environments in mines (such as winter operations) to prevent easily agglomerated agents such as emulsion explosives from accumulating and clogging in the discharge pipe 51, ensuring smooth discharge.

[0049] 6. Corrosion-resistant coating Composition details: The corrosion-resistant coating 6 is made of polytetrafluoroethylene and prepared by electrostatic spraying. The coating thickness is 0.8mm (which meets the design range of 0.5-1mm in the document). The spraying range includes: the inner wall of the cavity of the metering body 1 (from the top opening to the bottom transition channel 10 interface), the inner wall of the transition channel 10 (full length coverage), and the valve core surface of the electric valve 11 (including the contact part between the butterfly plate and the valve seat).

[0050] After spraying, the coating needs to be cured at 200℃ for 30 minutes to ensure that the adhesion between the coating and the metal surface is ≥5MPa (compliant with GB / T5270-2005 standard) and the coating surface is smooth (roughness Ra≤0.8μm). This avoids the residue of the agent sticking to the wall and can withstand the long-term corrosion of explosive agents containing nitrate and chloride ions.

[0051] Core function: It extends the service life of the device in corrosive chemical environments (2-3 times longer than uncoated devices), while preventing corrosion products from metal parts from contaminating the chemicals and ensuring stable blasting performance.

[0052] II. Working Principle and Operating Procedures of the Device This embodiment uses "single-quantity 200kg emulsion explosive for deep-hole blasting in mines" as an example to explain in detail the working process of the device: 1. Power-on initialization (Component: Display control unit 4) When the operator presses the "power button" on the operation button 42, the device is powered on; the controller 43 automatically completes the initialization and detects the status of the weighing module 3, the electric valve 11, and the heating and insulation jacket 52 (if a component fails, the display screen 41 will pop up a red fault prompt, such as "electric valve not zeroed"). After initialization, the display screen 41 shows "standby status", the weighing module 3 automatically zeros (or can be manually zeroed by the "zeroing button"), and the heating and insulation jacket 52 determines whether to start based on the ambient temperature (in this embodiment, the ambient temperature is 8℃, the heating jacket starts automatically, and the temperature controller displays the target temperature of 20℃).

[0053] 2. Parameter Settings (Component: Display Control Unit 4) The operator enters the setting interface through the "parameter setting key", inputs the preset dosage "200kg" on the display screen 41, and sets the opening time of the electric valve 11 to "10s" (to ensure that the medicine on the weighing module 3 is completely discharged into the discharge pipe 51). After the parameters are set, the display screen 41 returns to the main interface and displays "Waiting for feeding". At the same time, the wireless communication module 44 uploads the set parameters to the background management system.

[0054] 3. Feeding and weighing measurement (Components: Feeding assembly 2, Weighing module 3, Display control unit 4) The operator manually rotates the control handle of the flow regulating valve 22 to adjust the valve opening to 50% (the emulsion explosive has medium fluidity, and this opening can prevent overflow caused by feeding too quickly). Emulsion explosives are slowly poured into the feed hopper 21. The explosives fall into the bearing surface of the weighing module 3 through the feed hopper 21 and the flow regulating valve 22 (the baffle 31 prevents the explosives from spilling). The weighing module 3 converts the weight signal into an electrical signal in real time and transmits it to the controller 43. After processing the data, the controller 43 dynamically displays the current weight on the display screen 41 (such as "Current: 50.2kg" or "Current: 150.5kg").

[0055] 4. Automatic control after drug dosage reaches the target (components: display control unit 4, feeding assembly 2, electric valve 11) When the weighing module 3 detects that the weight of the medicine reaches 200.1 kg (close to the preset value of 200 kg, with a redundancy of 0.1 kg reserved by the controller 43), the controller 43 immediately outputs a control signal: The drive motor of the flow regulating valve 22 reverses to close the valve (stop feeding), and the display screen 41 displays "Feeding complete"; Synchronously energize the electromagnetic coil of electric valve 11 to open the valve (start material discharge), display screen 41 displays "Material discharge in progress" and starts a countdown (10s).

[0056] 5. Drug Discharge and Device Reset (Components: Discharge Assembly 5, Display Control Unit 4) After the electric valve 11 is opened, the emulsion explosive on the weighing module 3 flows into the external charging pipe through the transition channel 10 (with a tapered structure to accelerate the flow) and the discharge pipe 51 (with the heating and insulation sleeve 52 maintaining the temperature inside the pipe at 20°C so that the explosive does not clump) under the action of gravity, via the quick-connect interface 53. After the 10-second countdown ends, the controller 43 cuts off the power to the electric valve 11, and the valve closes; the weighing module 3 detects that the current weight is ≤0.2kg (determining that the medicine has been emptied), the display screen 41 displays "Metering completed", and automatically records the metering data (time: 2024-XX-XX 14:30, medicine quantity: 200.1kg). The wireless communication module 44 uploads the measurement data to the background system. The operator can open the electric valve 11 again by pressing the "manual discharge button" (if there is a small amount of residue), and then press the "zero button" to return the device to standby mode and prepare for the next measurement.

[0057] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A charge metering device for medium-deep hole blasting, characterized in that, The device includes a metering body (1), a feeding assembly (2) located on the top of the metering body (1), a weighing module (3) embedded inside the metering body (1), a display control unit (4) electrically connected to the weighing module (3), and a discharge assembly (5) located at the bottom center of the metering body (1). The metering body (1) is a hollow cavity structure with an open top. The weighing module (3) is horizontally laid in the middle of the cavity of the metering body (1), and the top of the weighing module (3) forms a bearing surface for bearing explosives. The metering body (1) also has a transition channel (10) inside. The feeding end of the transition channel (10) corresponds to the bottom of the bearing surface of the weighing module (3) and is connected to it. The discharge end of the transition channel (10) is connected to the feeding end of the discharge assembly (5), and an electric valve (11) for controlling the on / off state is provided in the transition channel (10). The electric valve (11) is electrically connected to the display control unit (4).

2. The charge metering device for medium-deep hole blasting according to claim 1, characterized in that, The feeding assembly (2) includes a feeding hopper (21) adapted to the top opening of the metering body (1) and a flow regulating valve (22) located at the outlet of the feeding hopper (21); the bottom of the feeding hopper (21) is fixedly connected to the top of the metering body (1), the flow regulating valve (22) is a butterfly valve structure, and the control end of the flow regulating valve (22) extends to the outside of the metering body (1); when the weighing module (3) detects that the weight of the blasting agent reaches the preset value, the display control unit (4) triggers the flow regulating valve (22) to close and simultaneously triggers the electric valve (11) to open.

3. The charge metering device for medium-deep hole blasting according to claim 1, characterized in that, The discharge assembly (5) includes a discharge pipe (51) connected to the discharge end of the transition channel (10), and a heating and insulation sleeve (52) sleeved on the outside of the discharge pipe (51); the axis of the discharge pipe (51) is at an angle of 15°-30° with the horizontal direction, and a quick-connect interface (53) is provided at the end of the discharge pipe (51) away from the transition channel (10); the axis of the transition channel (10) is at an angle of 20°-40° with the horizontal direction, and the inner diameter of the transition channel (10) gradually decreases from the feed end to the discharge end.

4. The charge metering device for medium-deep hole blasting according to claim 1, characterized in that, The display control unit (4) includes a display screen (41) fixed on the outer wall of the measuring body (1), operation buttons (42), and a controller (43) built into the side wall of the measuring body (1); the weighing module (3), electric valve (11), display screen (41), and operation buttons (42) are electrically connected to the controller (43), and the controller (43) is also connected to a wireless communication module (44) for data transmission; after receiving the weight signal from the weighing module (3), if the weight reaches a preset threshold, the controller (43) generates a valve switching command to control the electric valve (11) to open and maintain it for a preset time.

5. The charge metering device for medium-deep hole blasting according to claim 1, characterized in that, The weighing module (3) has an upwardly protruding baffle (31) on the edge of its bearing surface, and the baffle (31) is integrally formed with the weighing module (3).

6. The charge metering device for medium-deep hole blasting according to claim 1, characterized in that, The inner wall of the cavity of the metering body (1) is provided with a corrosion-resistant coating (6), which is a polytetrafluoroethylene coating and has a thickness of 0.5-1mm; the inner wall of the transition channel (10) and the valve core surface of the electric valve (11) are both provided with a corrosion-resistant coating (6) of the same material.

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